A fastening device for fastening a bolt to a fastening target object, wherein the bolt has a bolt head female screw section in an inner circumferential surface of a recess provided in an upper surface of a bolt head section. The fastening device includes a tension rod having a rod male screw section engaging the bolt head female screw section; a drive socket circumferentially surrounding the tension rod and having a lower end section with a grasper for laterally grasping the bolt head section; a supporter circumferentially surrounding the drive socket and having a lower end section protruding downward beyond a lower end section of the drive socket; a sensor for sensing compression force acting on the supporter in the upward/downward direction; a first motor for rotating the tension rod around an axis extending in the upward/downward direction; and a second motor for rotating the drive socket around the axis.
In a fastening device for fastening a bolt, a male thread is formed on a side surface of a bolt head part, and a part to be engaged is formed on a top surface of the bolt head part. The fastening device includes a bit having a tension rod having a rod female thread part, and an engaging part installed inside the tension rod and engaging the engaged part, the bit causing the bolt to rotate where the engaged part and engaging part are engaged; a supporter surrounding the tension rod in the circumferential direction such that the lower end part thereof protrudes below the lower end part; a sensor for sensing vertical compression force acting on the supporter; a first motor for causing the bit to rotate about the axis; and a second motor for causing the tension rod to rotate about the vertically extending axis.
Tightening device can fasten a fastening element by a target tightening force with good accuracy and facilitate automation. The tightening device includes a cylindrical drive socket holding a nut in the lower end opening thereof; a nut holder disposed inside the drive socket, a bolt passing through a bottom thereof, and regulating movement of the nut held by the drive socket toward the tip end of a threaded par; a tension rod which is disposed inside the nut holder and the lower end face of which has a threaded hole into which a portion of the threaded part that is further on the tip end side than the nut is screwed; a sensor for detecting tension force; a first motor for turning the tension rod around an axis that extends in the vertical direction; and a second motor for turning the drive socket around an axis.
B23P 19/06 - Screw or nut setting or loosening machines
B25B 21/00 - Portable power-driven screw or nut setting or loosening toolsAttachments for drilling apparatus serving the same purpose
B25B 23/147 - Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers
Provided is a nut and a bolt tightening method for fastening an object, wherein a tightening force is applied on the object by rotating a nut or a bolt in a state in which a predetermined tension force is applied on the bolt in the axial direction of the bolt. When the tensile force exerted on the bolt decreases as the tightening force increases and after a timing when an inflection point occurs in a time course change in a ratio of an amount of change in the tensile force exerted on the bolt to an amount of change in an angle of rotation of the nut or the bolt, the tightening resulting from the rotation of the nut or bolt is terminated and the tensile force applied on the bolt is removed.
B23P 19/06 - Screw or nut setting or loosening machines
B25B 23/14 - Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
F16B 31/02 - Screwed connections specially modified in view of tensile loadBreak-bolts for indicating or limiting tensile load
F16B 31/04 - Screwed connections specially modified in view of tensile loadBreak-bolts for maintaining constant tensile load
G01L 5/24 - Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed
[Problem] To make the tightening force resulting from a nut and bolt to have a target tightening force. [Solution] Provided is a nut and a bolt tightening method for fastening an object, wherein a tightening force is applied on the object by turning a nut or a bolt in a state in which a prescribed tension force is applied on the bolt in the axial direction of the bolt. After a time point when the bolt tension force decreases with an increase of the tightening force and an inflection point in changes over time in the ratio of the amount of change in the bolt tension force with respect to the amount of change in a nut or bolt rotation angle occurs, the tightening resulting from the turning of the nut or bolt is terminated and the tension force applied on the bolt is released.
[Problem] The purpose of the present invention is to provide a tightening device which can fasten a fastening element by a target tightening force with good accuracy and facilitates automation. [Solution] This tightening device is characterized by comprising: a drive socket which is cylindrical and holds a nut in the lower end opening thereof; a nut holder which is a bottomed cylinder that is disposed inside the drive socket, through the bottom of which a bolt is passed, and which regulates the movement of the nut held by the drive socket toward the tip end of a threaded part by means of said bottom; a tension rod which is disposed inside the nut holder and the lower end face of which has a threaded hole into which a portion of the threaded part that is further on the tip end side than the nut is screwed; a sensor for detecting tension force; a first motor for turning the tension rod around an axis that extends in the vertical direction; and a second motor for turning the drive socket around an axis that extends in the vertical direction.
B25B 21/00 - Portable power-driven screw or nut setting or loosening toolsAttachments for drilling apparatus serving the same purpose
B23P 19/06 - Screw or nut setting or loosening machines
B25B 23/14 - Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
B25B 23/147 - Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers
F16B 31/04 - Screwed connections specially modified in view of tensile loadBreak-bolts for maintaining constant tensile load
[Problem] To automate an operation for fastening a bolt in which a male thread part is formed on the outer peripheral surface of a bolt head part. [Solution] A fastening device for fastening a bolt into an object to be fastened, the bolt being such that a bolt-head-part male thread part is formed on a side surface of a bolt head part, and such that a part to be engaged is formed on a top surface of the bolt head part, wherein the fastening device is characterized by having: a bit having a tension rod that has a rod female thread part for threading onto the bolt-head-part male thread part, and an engaging part that is installed inside the tension rod so as to be vertically retractable and that engages with the part to be engaged, the bit causing the bolt to rotate about a vertically extending axis in a state in which the part to be engaged and the engaging part are engaged; a supporter disposed at a position so as to surround the tension rod in the circumferential direction, the supporter being such that the lower end part thereof protrudes below the lower end part of the tension rod; a sensor for sensing vertical compression force acting on the supporter; a first motor for causing the bit to rotate about the axis; and a second motor for causing the tension rod to rotate about the vertically extending axis.
B25B 21/00 - Portable power-driven screw or nut setting or loosening toolsAttachments for drilling apparatus serving the same purpose
B23P 19/06 - Screw or nut setting or loosening machines
B25B 23/14 - Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
B25B 23/147 - Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers
F16B 31/04 - Screwed connections specially modified in view of tensile loadBreak-bolts for maintaining constant tensile load
An error of an axial force detection is reduced by tensioning a bolt with a tensioning device engaged with a part of the bolt, different from a shaft portion of the bolt. A tensioning device is configured to apply upward tension to a bolt fastened to a fastened member H, and fitted with a washer. A first male thread portion is formed on an outer circumferential surface of the washer. The tensioning device includes a connection member having a first female thread portion to be engaged with the first male thread portion, a tensioning mechanism for tensioning the connection member in a state where the first male thread portion is engaged with the first female thread portion, and a tension bearer which is disposed around an outer circumference of the connection member, and bears a reaction force applied from the fastened member H in tensioning performed by the tensioning mechanism.
To provide a tensioning device capable of tensioning a bolt from a bolt head side while suppressing increase in the number of components. A tensioning device is configured to apply upward tension to a bolt fastened to a fastened member H. A first male thread portion is formed on an outer circumferential surface of a head of the bolt. The tensioning device includes a connection member having a first female thread portion to be threadly engaged with the first male thread portion, a tensioning mechanism for tensioning the bolt via the connection member in a state where the first male thread portion is threadly engaged with the first female thread portion, and a tension bearer which is disposed around an outer circumference of the connection member, and bears a reaction force applied from the fastened member H in tensioning performed by the tensioning mechanism.
A tensioning device is configured to apply upward tension to a bolt-nut fastener including a bolt fitted with a fastened member H, and a nut to be fastened to a shaft of the bolt, which protrudes from the fastened member. A first male thread portion is formed on an outer circumferential surface of the nut. The tensioning device includes a connection member having a first female thread portion to be engaged with the first male thread portion, a tensioning mechanism for tensioning the nut via the connection member in a state where the first male thread portion is engaged with the first female thread portion, and a tension bearer which is disposed around an outer circumference of the connection member, and bears a reaction force applied from the fastened member H in tensioning performed by the tensioning mechanism.
[Problem] To provide a pulling device capable of pulling a bolt from the bolt head side while suppressing the need to increase the number of components. [Solution] A pulling device 1 for upwardly pulling a bolt 10 fastened to a fastened body H, is characterized by comprising: a connection member 2 having a first female screw portion 21a1 with which a first male screw portion 12a is engaged, the first male screw portion 12a being formed on the outer circumferential surface of a head 12 of the bolt 10; a pulling mechanism 3 for pulling the bolt 10 via the connection member 2 in a state where the first male screw portion 12a is engaged with the first female screw portion 21a1; and a tension reception part 4 that is disposed around the outer circumference of the connection member 2 and that receives a reaction force applied from the fastened body H when the pulling mechanism 3 is performing pulling.
[Problem] The object of the present invention is to reduce errors in axial force detection, and the like, by screwing a pulling device to a site on a bolt that differs from the shaft portion and pulling on the bolt. [Solution] A pulling device 1 which is for pulling upward a bolt 10 that is fastened to a fastening target H, with a washer 11 inserted therebetween, and which is characterized in that: a first male thread portion 11a is formed on the outer circumferential surface of the washer 11; and the device is provided with a connecting member 2 having a first female thread portion 21a1 to which the first male thread portion 11a screws, a pulling mechanism 3 for pulling the connecting member 2 in a state in which the first male thread portion 11a is screwed to the first female thread portion 21a1, and a tension receiving portion 4 disposed around the outer periphery of the connecting member 2 and for receiving a reaction force acting from the fastening target H during pulling by the pulling mechanism 3.
[Problem] The purpose of the present invention is to improve the engagement between a pulling device and a bolt-nut assembly while limiting increases to the number of components. [Solution] A pulling device 1 which is for pulling upward a bolt-nut assembly provided with a bolt 10 inserted in a fastening target H and a nut 14 fastened to the shaft portion 11 of the bolt 10 protruding from the fastening target, and which is characterized in that: a first male thread portion 14a is formed on the outer circumferential surface of the nut 14; and the device is provided with a connecting member 2 having a first female thread portion 21a1 to which the first male thread portion 14a screws, a pulling mechanism 3 for pulling the nut 14 via the connecting member 2 in a state in which the first male thread portion 14a is screwed to the first female thread portion 21a1, and a tension receiving portion 4 disposed around the outer periphery of the connecting member 2 and for receiving a reaction force acting from the fastening target H during pulling by the pulling mechanism 3.
09 - Scientific and electric apparatus and instruments
Goods & Services
Torque wrenches Force measurement products, namely, digital force gauges, digital torque gauges and manual and motorized test stands used therewith sold as a unit with the gauges
09 - Scientific and electric apparatus and instruments
Goods & Services
Torque wrenches Force measurement products, namely, digital force gauges, digital torque gauges and manual and motorized test stands used therewith sold as a unit with the gauges
09 - Scientific and electric apparatus and instruments
Goods & Services
Torque wrenches Force measurement products, namely, digital force gauges, digital torque gauges and manual and motorized test stands used therewith sold as a unit with the gauges
A tightening tool such as a torque wrench is provided in which electric power can be fed to an electronic circuit with eliminating the need for a battery and achieving daily maintenance-free. In the tightening tool, when a tightening torque has reached a set torque value and a torque limiter is actuated, an electronic circuit unit that has obtained a detection signal outputted from a torque limiter actuation detection unit outputs a tightening completion signal. The tightening tool has a power generation unit for feeding electric power to the electronic circuit unit at least during the actuation of the torque limiter. The power generation unit performs photovoltaic power generation, electromagnetic induction power generation, power generation by conversion from mechanical energy into electrical energy, or temperature difference power generation.
B25B 23/142 - Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers
H02J 7/35 - Parallel operation in networks using both storage and other DC sources, e.g. providing buffering with light sensitive cells
[Problem] To provide a fastening tool such as a torque wrench which enables power supply to an electronic circuit while eliminating the need for routine maintenance by making a battery unnecessary. [Solution] A fastening tool which outputs a fastening completion signal from an electronic circuit unit that has acquired a detection signal outputted by a torque limiter operation detection unit when fastening torque has reached a set torque value and a torque limiter operates, the fastening tool comprising a power generation unit which supplies power to the electronic circuit unit at least when the torque limiter operates. The power generation unit is a photovoltaic power generator, electromagnetic induction power generator, power generator for converting mechanical energy to electrical energy, or temperature difference power generator.
B25B 23/144 - Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers wherein the work-contacting component pivots or rotates relative to the handle when a selected torque is exceeded having an electrical device activated by the pivotal or rotational movement which emits a signal when the selected torque is exceeded
An angle wrench has a simple structure and is capable of accurately measuring rotation angle. The angle wrench is used for tightening an object to be tightened by means of the rotation angle method, and includes a handle having a grip; a head section having a tightening head for tightening the object to be tightened, and a tail section that extends from the tightening head pivotally supported with respect to the handle via a head pin; torque-detecting mechanisms for detecting when the torque for tightening the object being tightened reaches the specified torque; and a rotation angle-measuring section for measuring the rotation angle of the angle wrench in a tightening action, on the basis of the angular velocity of the angle wrench around the axis of the object being tightened, after the torque-detecting mechanism has detected that the specified torque has been reached.
B25B 23/142 - Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers
G01B 5/24 - Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapersMeasuring arrangements characterised by the use of mechanical techniques for testing the alignment of axes
It is to provide a torque driver capable of bringing a marker into direct contact with a surface of a fastener member such as a screw to perform marking.
A torque driver 1 is configured such that a case 10 is rotated relative to a main shaft 20 when a tightening force applied to the case 10 is transmitted to the main shaft 20 through a torque limiter section 30 and a tightening torque on a screw 80 engaged with a bit 70 attached to a coupler 60 fixed at a tip portion of the main shaft 20 reaches a torque value set in the torque limiter section 30. The torque driver 1 includes: a marker 54 extending from an inside of the coupler 60 to a tip portion of the bit 70 along a side surface of the bit 70; and a marker activating section 40 that allows the marker 54 to move forward by utilizing rotation of the case 10 relative to the main shaft 20 so that a marker tip portion 53 is brought into contact with the screw 80 to perform marking.
B25B 23/145 - Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for fluid operated wrenches or screwdrivers
B25B 23/15 - Arrangement of torque limiters or torque indicators in wrenches or screwdrivers having a mechanism to mark the work when the selected torque is applied to the work
B25B 23/142 - Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers
The present invention addresses the problem of providing an angle wrench that has a simple structure and is capable of accurately measuring rotation angle. The solution to the problem is an angle wrench used for tightening an object to be tightened by means of the turn-of-nut method, the angle wrench being provided with: a handle (2) having a grip (2a); a head section (4) having a tightening head (4a) for tightening the object to be tightened, and the tail section (4c) that extends from the tightening head (4a) being pivotally supported with respect to the handle (2) via a head pin (2b); torque-detecting mechanisms (6, 18, 20) for detecting when the torque for tightening the object being tightened reaches the specified torque; and a rotation angle-measuring section (24, 102) for measuring the rotation angle of the angle wrench in a tightening action, on the basis of the angular velocity of the angle wrench around the axis of the object being tightened, after the torque detection mechanism has detected that the specified torque has been reached.
B25B 23/144 - Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers wherein the work-contacting component pivots or rotates relative to the handle when a selected torque is exceeded having an electrical device activated by the pivotal or rotational movement which emits a signal when the selected torque is exceeded
B25B 23/14 - Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
[Problem] To provide a torque driver capable of making a mark by bringing the marker into direct contact with the surface of the screw or other type of fastening member. [Solution] A torque driver (1) in which the tightening force on the case (10) is transmitted to the main shaft (20) via a torque limiter part (30) and in which the case (10) rotates with respect to the main shaft (20) when the tightening torque on a screw (80), which is engaged with a bit (70) mounted on a coupler (60) that is fixed to the tip of the main shaft (20), reaches a torque value established for the torque limiter part (30). The torque driver comprises: a marker (54) that passes from inside the coupler (60) through the side surface of the bit (70) to reach the tip of the bit (70); and a marker-operating part (40) that causes the tip (53) of the marker to contact and mark the screw (80) by moving the marker (54) forward using the rotation of the case (10) with respect to the main shaft (20).
B25B 23/15 - Arrangement of torque limiters or torque indicators in wrenches or screwdrivers having a mechanism to mark the work when the selected torque is applied to the work
B25B 23/14 - Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
B25B 23/142 - Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers
To make improvements in torque wrenches with a torque limiter that uses a cam mechanism and to provide a torque wrench that realizes more stable operation and is capable of highly precise tightening. In a torque wrench with a torque limiter that uses a cam mechanism, a solid columnar roller member 14 is engaged with a cam part 7 of a cam shaft 8 such that it is rotatably supported by a roller support lever member 12 mounted in a head portion 2 such as to be rotatable around a support shaft 16 and such that it is pressed against the cam part 7 by a spring force transmitting rod 18 biased by a torque setting spring. The roller support lever member 12 is configured such that the distance r2 from the support shaft 16 to a point of application of force of the spring force transmitting rod 18 is longer than the distance r1 from the support shaft 16 to the roller member 14.
Provided is an improved torque wrench having a torque limiter using a cam mechanism capable of operating more stably and fastening objects with high accuracy. In a torque wrench having a torque limiter using a cam mechanism, a solid cylindrical roller member (14) engages with a cam portion (7) of a cam shaft (8), and a roller supporting lever body (12) attached to a head portion (2) so as to be rotatable about a spindle (16) supports the roller member (14) such that the roller member (14) can rotate. The roller member (14) is pushed toward the cam portion (7) by a spring force transmitting rod (18) urged by a torque setting spring. In the roller supporting lever body (12), the distance (r2) from the spindle (16) to the point of action of the spring force transmitting rod (18) is longer than the distance (r1) from the spindle (16) to the roller member (14).
B25B 23/157 - Arrangement of torque limiters or torque indicators in wrenches or screwdrivers having torque controlled clutch-type arrangements
B25B 23/142 - Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers
Provided is a torque wrench having a cam-type torque detection mechanism capable of detecting torque with high accuracy and allowing users to safely fasten members to be fastened such as bolts with natural handling feel after torque detection. In a torque wrench having a cam-type torque detection mechanism, a cam portion (27) formed at the outer periphery of a cam cylinder (22) includes a static engaging cam surface (27a) with which a roller member (18) at a standstill engages while the roller member (18) is not operating, a torque peak increasing cam surface (27b) that is linked to the static engaging cam surface (27a) and gradually increases the peak value of the torque when the roller member (18) moves while being in contact with the torque peak increasing cam surface (27b), a cam top surface (27c) that is linked to the torque peak increasing cam surface (27b) and forms a cam top portion, a torque reducing cam surface (27d) that gradually reduces the positive torque applied to the roller member (18) to zero, and a negative torque cam surface (27e) that applies negative torque to the roller member (18) after the roller member (18) passes through the torque reducing cam surface (27d).
The torque tool device includes a torque tool and an information processing terminal. The torque tool is capable of measuring the torque value at which a bolt or the like was tightened and then transmitting the measured torque value via wireless communication unit and the information processing terminal has information processing unit receiving the measured torque value and determining whether the torque value is acceptable.
[PROBLEMS] A torque tool device can quickly perform tightening work without requiring operation other than the tightening and can perform continuous tightening by instantaneously determining whether tightening has been appropriately performed. [MEANS FOR SOLVING PROBLEMS] The torque tool device has a torque tool (1) for measuring a torque value by which a bolt or any other fastener is tightened and capable of transmitting the measured torque value by wireless communication means, and also has an information processing terminal (20) having information processing means that receives the measured torque value and determines whether the torque value is appropriate. It is not necessary to provide the torque tool (1) with a device for a pass/fail determination, and this helps to reduce the weight of the torque tool device. Further, because the ISM frequency band is used for the wireless communication, instantaneous transmission and reception of determination results are possible to allow the torque tool (1) to perform continuous and quick tightening work.
B25B 23/144 - Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers wherein the work-contacting component pivots or rotates relative to the handle when a selected torque is exceeded having an electrical device activated by the pivotal or rotational movement which emits a signal when the selected torque is exceeded
B25B 23/14 - Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
[PROBLEMS] A torque tool device can reliably determine which torque tool performed bolt tightening and can ensure traceability from a torque tool to a standard of torque. [MEANS FOR SOLVING PROBLEMS] Upon completion of tightening of a bolt, a torque wrench (1) transmits as a set the production number of the torque wrench (1) and tightening data, such as a tightening torque value, to a processing terminal (20). The processing terminal (20) transmits the production number and the tightening data to an externally connected device (30). Tightening data and data on tightened bolts etc. are recorded for each production number into the externally connected device (30). Thus, the torque wrench (1) is specified from a tightened bolt, and traceability can be ensured.
B25B 23/144 - Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for hand operated wrenches or screwdrivers wherein the work-contacting component pivots or rotates relative to the handle when a selected torque is exceeded having an electrical device activated by the pivotal or rotational movement which emits a signal when the selected torque is exceeded
B25B 23/14 - Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
