To provide a method for producing a resin additive with which inorganic particles can be incorporated in large amounts into resins and which has satisfactory flowability even when having a high inorganic-particle content and can improve thermal conductivity and lower water absorption. A method for producing a resin additive comprising a mixing step in which inorganic particles, an organic acid, and a pH adjusting agent are mixed together to obtain a mixture having a pH of 5-9, a pretreatment step in which the surface of the inorganic particles is treated with an organic acid to form a surface treatment layer having a functional group, and a post-treatment step in which the inorganic particles having the surface treatment layer are treated with a nitrogen-containing post-treatment agent to form a post-treatment layer on the surface of the inorganic particles.
Provided is a water supply device for a blade capable of continuously supplying a sufficient amount of cooling water from a water supply tank to a blade, and reliably and smoothly executing water supply work in cutting work. The present invention is characterized in that: the water supply device has a pressurizing case 4 surrounding an outer side of an outer peripheral surface of a blade shaft 2 and forming a pressure chamber 45; an impeller 8 is fixed, in the pressure chamber 45, to the outer peripheral surface of the blade shaft 2; a region on the inner side in the radial direction in the pressure chamber 45 is configured to communicate with supply passages (an introduction chamber 44, the water supply tank and the like) on the upstream side for supplying cooling water to the pressure chamber 45; and a region on the outer side in the radial direction in the pressure chamber 45 is configured to communicate with supply passages (a water supply chamber 46, a central water passage 21 and the like) on the downstream side for supplying cooling water to a blade 6.
E01C 23/09 - Devices or arrangements for working the finished surfaceDevices for repairing the surface of damaged paving for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removedDevices or arrangements for working the finished surfaceDevices for repairing the surface of damaged paving for cleaning, treating, or filling cuts, grooves, recesses, or fissuresDevices or arrangements for working the finished surfaceDevices for repairing the surface of damaged paving for trimming paving edges
A breather for a vibration generating device includes a center passage extending from an inner portion to an outer portion of a vibration generating shaft, an inner opening portion in an outer circumferential surface of the inner portion, an intake opening portion in a surface of the outer portion, an exhaust opening portion, an inner passage causing the center passage and the inner opening portion to communicate with each other, an intake passage causing the center passage and the intake opening portion to communicate with each other, and an exhaust passage causing the center passage and the exhaust opening portion to communicate with each other, an intake valve that opens in a case in which a pressure in the casing becomes negative disposed inside the intake passage, and an exhaust valve that opens in a case in which a pressure in the casing becomes positive disposed inside the exhaust passage.
Provided is a block compactor equipped with a brake mechanism capable of securely locking rollers with a simple structure and stably maintaining a locked state and an unlocked state even when exposed to vibration. A brake pad 12 is fixed to a lower end portion of a brake shaft 11 and is configured to be rotatable together with the brake shaft 11 between two rollers 5 adjacent in the front and rear. By rotating a brake lever 13, the brake pad 12 can be switched between an unlocked state in which the brake pad 12 does not contact with the outer circumferential surfaces of the rollers 5, and the rollers 5 are free to rotate, and a locked state in which the brake pad 12 contacts with the outer circumferential surfaces of the rollers 5, and the rollers 5 cannot rotate with the friction force.
YAMAGUCHI PREFECTURAL INDUSTRIAL TECHNOLOGY INSTITUTE (Japan)
Inventor
Nogami Osamu
Ino Haruka
Mae Hideo
Miyazaki Shogo
Abstract
[Problem] To provide a method for producing a resin additive with which inorganic particles can be incorporated in large amounts into resins and which has satisfactory flowability even when having a high inorganic-particle content and can improve thermal conductivity and lower water absorption. [Solution] A method for producing a resin additive comprising a mixing step in which inorganic particles, an organic acid, and a pH regulator are mixed together to obtain a mixture having a pH of 5-9, a pretreatment step in which the surface of the inorganic particles is treated with an organic acid to form a surface treatment layer having a functional group, and a post-treatment step in which the inorganic particles having the surface treatment layer are treated with a nitrogen-containing post-treatment agent to form a post-treatment layer on the surface of the inorganic particles.
Provided is a breather for a vibrator device that allows for an inflow or outflow of air according to a differential pressure between the inside and the outside of a casing, and that can prevent water from entering the casing even when submerged. The breather for a vibrator device comprises: a central passage 61 formed to extend from an inside part 31 to an outside part 32 of a vibrator shaft 3; an inside opening 62 formed on an outer circumferential surface of the inside part 31; an intake opening 63 and an exhaust opening 64 formed in a surface of the outside part 32; an inside passage 65 communicating between the central passage 61 and the inside opening 62; an intake passage 66 communicating between the central passage 61 and the intake opening 63; and an exhaust passage 67 communicating between the central passage 61 and the exhaust opening 64. An intake valve 7 that opens when the pressure inside the casing turns negative is placed in the intake passage 66, and an exhaust valve 8 that opens when the pressure inside the casing turns positive is placed in the exhaust passage 67.
A concrete vibrator can automatically change the rotational speed of a motor depending on the state of a vibrating tube. Under control by a controller, the concrete vibrator is operated in a normal mode in which the motor is supplied with driving power having a frequency to make the motor rotate at a rotational speed suitable for air bubble removal, or in an idling mode in which the motor is supplied with driving power having a frequency to make the motor rotate at a lower rotational speed than in the normal mode. The controller measures, per unit of time, a value of a current that is input to the controller or motor, compares a latest current value to a reference value calculated based on a past measurement value, and compares an absolute value of the comparison value to a threshold to grasp the state of the vibrating tube.
E04G 21/06 - Compacting concrete, e.g. by application of vacuum before hardening
H02P 29/032 - Preventing damage to the motor, e.g. setting individual current limits for different drive conditions
H02P 29/40 - Regulating or controlling the amount of current drawn or delivered by the motor for controlling the mechanical load
B06B 1/16 - Processes or apparatus for generating mechanical vibrations of infrasonic, sonic or ultrasonic frequency making use of mechanical energy operating with systems involving rotary unbalanced masses
H02K 7/06 - Means for converting reciprocating motion into rotary motion or vice versa
The objective of the present invention is to provide a concrete vibrator which is capable of automatically changing the rotational speed of a motor in accordance with the state of a vibrating cylinder, and which is capable of suitably avoiding an overheated state of the motor and failure resulting therefrom. This concrete vibrator is configured in such a way as to be operated under the control of a control means 8 in a normal mode in which driving power having a frequency capable of causing a motor 2 to rotate at a rotational speed suitable for a bubble removing operation is supplied to the motor 2, or in an idling mode in which driving power having a frequency capable of causing the motor 2 to rotate at a rotational speed lower than in the normal mode is supplied to the motor 2, wherein the control means 8 is configured in such a way that the operating mode is switched appropriately, by measuring the value of a current input into the control means 8 or the motor 2 at intervals of a unit of time and recording the same in a memory, comparing the most recent current value with a reference value calculated on the basis of a previous measured value, and recognizing the state of the vibrating cylinder by comparing the absolute value of the comparison value with a threshold.
A fall detection sensor for a rammer includes an acceleration sensor, a low-pass filter, an integrator, a first comparator, a second comparator, and control means. The second comparator compares wave patterns of input signals with a plurality of types of fall sample waves and non-fall sample waves stored in advance. The second comparator outputs a fall detection signal upon determining that the rammer has fallen when the similarity with one of the fall sample waves exceeds a threshold, and the second comparator outputs a non-fall signal upon determining that the rammer has not fallen when the similarity with one of the non-fall sample waves exceeds a threshold.
G01C 9/02 - Measuring inclination, e.g. by clinometers, by levels Details
H02P 3/06 - Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
H02P 3/00 - Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
Provided is a fall-down detection sensor for a rammer, which is capable of determining, with high accuracy, a fall-down state of the rammer which operates with a large amount of vibration and shock, and rapidly stopping a motor (engine or the like). The present invention includes an acceleration sensor (2), a low pass filter (3), an integrator (4), a first comparator (5), a second comparator (6), and a control means (7), wherein the second comparator (6) is configured to compare patterns of waveforms of input signals (x'~ z') with patterns of a plurality of kinds of pre-stored sample waveforms (FW) when fall–down occurs, and sample waveforms (NFW) when fall–down does not occur, determine the rammer to have fallen down and output a fall-down detection signal (fs) when similarities with the sample waveforms (FW) when fall-down exceeds a threshold value, and determine the rammer has not fallen down and output a non-fall down signal (nfs), when similarities with the sample waveform (NFW) when fall-down does not occur exceeds a threshold value.
Provided are: a method which, by the use of a reduced number of steps and by only simple working, is capable of manufacturing a box-shaped protective cover for a vibrating compactor, the protective cover having sufficient strength; and a protective cover for a vibrating compactor. A box-shaped protective cover for covering the upper structure of the body of a vibrating compactor is manufactured by performing the following steps: a cutting step in which a single metallic plate is worked into a shape having a first flat surface section (1), a second flat surface section (2), an intermediate section (3), and side flaps (5 (5a-5d)); a bending step in which the side flaps (5) and the intermediate section (3) are bent or curved; and a welding step in which the side flap (5a (or 5b)) of the first flat surface section (1) and the side flap (5c (or 5d)) of the second flat surface section (2) are welded together.
A box-shaped protective cover that covers an upper structural portion of a body of a vibrating compactor is manufactured by executing a cutting process for fashioning a single metal plate into a shape including a first planar portion, a second planar portion, an intermediate portion, and a plurality of side flaps, a bending process for bending or curving the side flaps and the intermediate portion, and a welding process for welding a side flap of the first planar portion to a side flap of the second planar portion.
A cutting apparatus has a main body including a body frame, wheels, a motor and a blade; a blade cover; and a slide guide. A cutting depth of the blade is adjustable. A blade cover casing entirely covers the blade. A slider having left and right linear portions is attached to a rear surface of the casing. The slide guide has circular-arc portions and flaps for sandwiching the linear portions of the slider. A gap is formed between the flaps and a side surface of the body frame. By sandwiching the linear portions of the slider between a flap and the body frame, and sandwiching the circular-arc portions between the left and right linear portions, the blade cover can slide in the up-down direction with respect to the slide guide and the body frame and can rotate about the circular-arc portions.
E01C 23/09 - Devices or arrangements for working the finished surfaceDevices for repairing the surface of damaged paving for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removedDevices or arrangements for working the finished surfaceDevices for repairing the surface of damaged paving for cleaning, treating, or filling cuts, grooves, recesses, or fissuresDevices or arrangements for working the finished surfaceDevices for repairing the surface of damaged paving for trimming paving edges
A dust collection device for a concrete cutter includes a suction duct disposed on an upstream-most side; a plurality of dust collectors of a cylindrical cyclone system disposed in series downstream of the suction duct; and a plurality of dust collection chambers connected respectively to the plurality of dust collectors and storing individually dust separated in each of the dust collectors. A blower is disposed between any two of the plurality of dust collectors and performs intake and discharge of air by rotation of a built-in fan. A return flow channel communicates the suction duct with the dust collection chamber which is connected via a connection portion to a dust collector disposed on a downstream-most side from among the plurality of dust collectors, or a return flow channel communicates the suction duct with the connection portion.
An overturn detecting sensor, which can precisely, namely, highly precisely judge overturn of a machine body even if the sensor is applied to a compaction machine operating with large vibration and shock. The overturn detecting sensor is provided with an acceleration sensor (2), a low pass filter (3), an integrating circuit (4) and a comparator (5). The acceleration sensor (2) can detect gravity acceleration and is mounted on the compaction machine so that a detection axis becomes almost vertical when only one detection axis exists and the compaction machine is in a basic position. A signal outputted from the acceleration sensor (2) is worked by the low pass filter (3) and the integrating circuit (4), and is inputted to the comparator (5). It can be judged whether the compaction machine overturns or not.
An engine stop switch and a fuel open-close lock are accommodated in a throttle lever case so that they can be easily disassembled, and the engine stop switch is turned on and off and the fuel open-close cock is opened and closed adequately by the actuation of a rotary valve in response to the turning of a lever. An engine stop switch and a fuel open-close lock are integrally incorporated in a throttle lever case, a partially toothless driven gear is intermittently rotated via a partially toothless drive gear rotated by a lever, and the intermittent rotation of the partially toothless driven gear turns on/off the engine stop switch and opens/closes the fuel open/close cock.
F02D 11/02 - Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by hand, foot, or like operator controlled initiation means
F02D 11/04 - Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by mechanical control linkages
