WO2017104534A1

WO2017104534A1 - Work aid device

Info

Publication number: WO2017104534A1
Application number: PCT/JP2016/086552
Authority: WO
Inventors: 洋一郎小池; 智弘蜂須賀; バンルェントン
Original assignee: 株式会社マキタ
Priority date: 2015-12-18
Filing date: 2016-12-08
Publication date: 2017-06-22
Also published as: JP2017109290A

Abstract

A work aid device (10) includes the following: a torso harness (20) to be worn on the torso of a worker who is working using a handheld work device (W); an arm (30) that extends upward and forward from the torso harness (20) and that has a tip located above the arm of the worker; a wire (40) that hangs down from the tip of the arm (30); and an arm support (50) that dangles from the wire (40) and is to be worn on the arm of the worker. When the worker works using the handheld work device (W), the arm of the worker holding the handheld work device (W) is supported by the arm support (50).

Description

Work assistance device

The present invention relates to a work assistance device for supporting an arm part of an operator who holds a hand-held work machine, and more particularly, to support an arm part when the worker is holding the work machine. An arm portion that includes an arm support that is suspended from above the worker to be mounted on the worker's arm portion, thereby reducing the load on the worker's arm portion to grip the work implement The present invention relates to a support device.

Work assist devices that are intended to reduce the load on the hand due to the load of a hand-held work machine that is held by the operator's hand are known in this technical field. For example, WO97 / 14540 discloses a harness that an operator carries with a shoulder strap and a waist strap, a tubular arm that is attached to the harness and extends to the upper front side of the operator, and is slidably inserted into the tubular arm. An operation assisting device is disclosed that includes a wire that hangs from the front upper portion of the tubular arm, a spring balancer that is attached to a harness and pulls the wire with a predetermined load, and a hook provided at the tip of the wire. In this work assisting device, the handheld work machine that is held by the worker is hooked on the hook, so that the handheld work machine is suspended by the wire in front of the worker, and the operator can load the load on the handheld work machine. It can be made not to receive the load on the hand by.

The work assist device described in the above PCT publication allows the handheld work machine to be suspended by a wire in front of the worker, so that the worker does not feel the load caused by the load of the handheld work machine. Can work. However, when the worker releases the hand holding the handheld work machine, the handheld work machine is suspended while swinging in front of the worker, and the handheld work machine is There was a risk of swaying toward the operator.

The present invention does not suspend the work machine from above with a wire on the front side of the worker, and suspends the arm support that supports the arm part of the worker working on the hand-held work machine with the wire. The load applied to the operator's arm to grip the operator (the force required for the operator's arm) should be reduced, and the work implement suspended on the wire will sway in front of the operator and hit the operator's body. The purpose is to prevent the occurrence of

In order to achieve the above object, the present invention provides a body part mounting tool to be mounted on a body part of an operator working on a hand-held work machine, and the body part connected to the body part mounting tool at a back part of the worker. An arm having a tip extending upward and forward from the mounting tool and having a tip above the worker's arm, a wire hanging from the tip of the arm, and the work when the worker holds the hand-held work machine. An arm support that is suspended by the wire to be mounted on the person's arm, and the arm of the operator holding the handheld work machine is supported by the arm support It is an object of the present invention to provide a work auxiliary device characterized by the above.

In the work auxiliary device configured as described above, the arm portion of the worker who holds the hand-held work machine is supported by the arm support tool that is mounted on the arm portion of the worker and suspended by the wire. The load applied to the worker's arm to hold the work machine is reduced, and the worker can work without feeling the load on the arm due to the load of the gripped work machine. At this time, if the hand-held work machine moves away from the operator's hand (slids down), the hand-held work machine is not directly suspended by the wire and falls to the ground. It will not be a situation where it hangs and shakes and hits the worker.

In the work auxiliary device according to the present invention, more preferably, the arm is made of a hollow tube material, and a part of the wire is slidably inserted into the hollow tube material, and is connected to the wire. Is provided with a spring balancer for pulling the arm support tool upward with a predetermined load and pulling the arm support tool upward. When this is done, the wire can be pulled according to the load of the handheld work machine by the spring balancer. In addition, since the spring balancer was attached to the body mounting tool without being attached to the tip of the arm, it was possible to prevent the tip of the arm from becoming heavy.

More preferably, the work assisting device according to the present invention includes a first arm part having an arm extending upward from the body part mounting tool, and a second arm part extending forward from a tip part of the first arm part. And at least one of the second arms is configured to be extendable. When it does in this way, it becomes possible to arrange | position the front-end | tip part of a 2nd arm part in the suitable upper position of an operator's arm part according to a worker's physique.

The work assisting device according to the present invention is more preferably a harness in which the body part mounting tool includes a back pad part to be mounted on an operator's back, a shoulder strap provided on the back pad part, and a waist strap. In such a case, the body part mounting tool can be mounted on the operator's body part without taking time and effort.

In the work assistance device according to the present invention, the arm support may be a glove that is worn on the operator's hand as an embodiment. Moreover, an arm part support tool can be made into the cylindrical band with which an operator's forearm part is mounted | worn as other embodiment. As still another embodiment, the arm attachment device can be a grip that is attached by being gripped by an operator's hand.

FIG. 1 is a side view of an embodiment of a work assisting device according to the present invention attached to an operator, in which the arm support is a glove.

FIG. 2 is a side view of another embodiment of the work assisting device according to the present invention attached to an operator, where the arm support is a cylindrical band.

FIG. 3 is a side view of a further embodiment of the work assisting device according to the present invention attached to an operator, where the arm support is a grip.

Hereinafter, an embodiment of the work assistance device of the present invention will be described with reference to the accompanying drawings. As shown in FIG. 1, the work assisting device 10 is for reducing the load on the arm of the worker due to the load of the hand-held work machine W that the worker grips with his hand. This embodiment demonstrates the case where the hand-held working machine W is a hedge trimmer as an example. Since the hedge trimmer W is a known hand-held work machine, detailed description thereof is omitted. The work assisting device 10 includes a body part mounting tool 20 to be mounted on the worker's body part, and extends upward from the body part mounting tool 20 and then forwards, with a tip above the worker's arm (hand, forearm). An arm 30, a wire 40 that hangs down from the tip of the arm 30, and an arm support 50 that is attached to the operator's arm and suspended by the wire 40.

The torso part mounting tool 20 is attached to the operator's torso part (shoulder, chest, abdomen, back, etc.), and in this embodiment, has a harness structure that is carried by the operator. The body part mounting tool 20 includes a back pad part 21 to be mounted on the operator's back, a pair of left and right shoulder straps 22 provided on the back pad part 21, and a waist strap 23 provided below the back pad part 21. I have. The body part mounting tool 20 is not limited to the harness structure, and clothes such as a vest, a backpack or the like may be used as long as the body part mounting tool 20 is attached to the body part of the operator. An arm 30 and a spring balancer 41 are attached to the rear surface of the backrest portion 21 of the body portion mounting tool 20.

The arm 30 is intended to hang the wire 40 from above the arm portion of the operator, and uses a hollow tube material through which the wire 40 is slidably inserted. The arm 30 includes a first arm portion 31 that is fixed to the rear surface of the backrest portion 21 and extends upward, and a second arm portion 32 that extends forward from the distal end portion of the first arm portion 31. The 1st arm part 31 and the 2nd arm part 32 can be expanded-contracted by a telescopic mechanism, for example. The upper part and the lower part of the first arm part 31 are fixed to the backrest part 21, and are difficult to tilt forward and backward. The 1st arm part 31 is extended from the lower part of the trunk | drum mounting tool 20 diagonally on the left, and the upper part of the 1st arm part 31 is extended above the operator's left shoulder. The length of the 1st arm part 31 is the length in which the upper end part is located in a worker's head vicinity. The lower end portion of the first arm portion 31 is attached to the lower portion of the body portion mounting tool 20 so as to be rotatable about the longitudinal axis, and the upper portion of the first arm portion 31 extends upward from the right shoulder of the operator. You may do it. Further, the first arm portion 31 is rotatable about its axis, and the second arm portion 32 is rotated about the axis of the first arm portion 31 on the left front side of the operator by the rotation of the first arm portion 31. Can be rotated. The first arm portion 31 is preferably rotated within a range of 3 ° to the operator's face side and 20 ° to the opposite side of the operator's face when the direction in which the operator faces the front is 0 °. By restricting the rotation angle of the first arm portion 31, the second arm portion 32 is prevented from coming into contact with the worker and is not greatly displaced from the upper position of the worker's arm portion. The second arm portion 32 is rotatable about its axis, and the second arm portion 32 is preferably rotatable within a range of 30 ° or less.

The second arm portion 32 is fixedly connected to the upper end portion of the first arm portion 31 via a mounting bracket 33. The second arm portion 32 extends obliquely upward from the upper end of the first arm portion 31, and the second arm portion 32 has a length when the arm is extended forward so that the worker is in a working posture. In addition, the tip of the second arm portion 32 is positioned above the arm portion of the operator. A pulley 34 is provided at the front end portion of the second arm portion 32 to improve the sliding of the sliding wire 40. A pulley 35 is also provided on the mounting bracket 33 that connects the first arm portion 31 and the second arm portion 32, and the pulley 35 allows the wire 40 to pass through the first arm portion and the second arm portion 32. Good. The arm 30 of this embodiment includes a first arm portion 31 and a second arm portion 32 connected to the tip portion of the first arm portion 31, but is not limited to this. The arm part 31 and the second arm part 32 may be integrally formed of one pipe material. Further, the angle between the first arm portion 31 and the second arm portion 32 is not limited to an obtuse angle, and may be a right angle or an acute angle. Furthermore, the arm 30 may have an arc shape and extend from the backrest portion 21 to above the operator's arm portion in a curved shape.

The wire 40 hangs the hedge trimmer W which is a hand-held work machine, and comes out of a spring balancer 41 provided at the lower rear portion of the backrest portion 21. The wire 40 coming out of the spring balancer 41 is inserted from the lower end opening of the first arm portion 31 into the inner hole of the first arm portion 31, and passes through the upper end opening of the first arm portion 31 and the rear end opening of the second arm portion 32. It passes through the front end opening of the second arm portion 32. The wire 40 hangs down from the front end portion of the second arm portion 32 to the front side of the operator, and is attached to the arm portion (forearm or hand) of the operator via a mounting bracket 42 such as a carabiner at the tip end portion of the wire 40. The arm support 50 to be attached is detachably connected. The arm support 50 in the embodiment of FIG. 1 is a glove that is worn on the hand of an operator. The spring balancer 41 pulls the wire 40 with a predetermined force corresponding to the weight of the hedge trimmer W. Note that the pulling force of the spring balancer 41 can be changed according to the weight of a hand-held work machine such as a hedge trimmer.

Next, the work using the hedge trimmer W when the worker wears the work auxiliary device 10 of the present invention will be described. An operator wears the harness that is the body attachment device 20 and pulls the wire 40 to attach the attachment fitting 42 at the distal end to the glove that is attached to the left hand that is the arm support 50. In this state, the operator holds the rear handle W1 of the hedge trimmer W with the right hand and holds the front handle W2 with the left hand. In this state, when the operator turns on the trigger switch provided on the rear handle W1 with the right hand, the pair of upper and lower shear blades W3 reciprocate back and forth in opposite directions, and hit the shear blade W3 against the hedge. Are cut by a pair of upper and lower shear blades W3 that reciprocate in opposite directions. At this time, the arm support 50 of the left hand of the operator is suspended from the front end of the second arm 32 by the wire 40, and the hedge trimmer W is mounted on the hand holding the front handle W2. The wire 40 is suspended from the front end portion of the second arm portion 32 via the support 50, and the operator can work without feeling a load due to the load of the gripped hedge trimmer W. In this work assisting device 10, the hedge trimmer W is not directly hung by the wire 40, but the arm portion of the worker holding the hedge trimmer W is hung by the arm support 50 attached to the hand of the worker. Therefore, even if the hedge trimmer W slides down from the operator's hand during the work of the worker, the hedge trimmer W falls to the ground without being suspended in front of the worker, and the hedge trimmer W It is no longer possible to hang on the front side and hit the worker.

In the work assisting device 10 described here, a pipe material is employed for the arm 30, and the wire 40 is slidably inserted into the arm 30, and the wire 40 is pulled to the body portion mounting tool 20 with a predetermined load. A spring balancer 41 was provided. Thus, the wire 40 can be pulled according to the load of the hedge trimmer W by the spring balancer 41, and the operator does not feel the load due to the load of the hedge trimmer W or the minimum necessary amount due to the load of the hedge trimmer W. Pruning can be done just by feeling the load. That is, by feeling a slight load of the handheld work machine, it is possible to work while feeling the operational feeling of the handheld work machine.

In the work auxiliary device 10 described here, the arm 30 includes a first arm portion 31 that extends upward from the backrest portion 21 of the body portion mounting tool 20, and a second arm that extends forward from the distal end portion of the first arm portion 31. The arm part 32 was provided, and both the 1st arm part 31 and the 2nd arm part 32 were made extensible. Thereby, it becomes possible to arrange | position the front-end | tip part of the 2nd arm part 32 appropriately above an operator's hand according to a worker's physique, and hold | grip the hedge trimmer W in the position which is easy to use on the operator's front side. The operator's arm can be suspended by the wire 40. In this embodiment, both the first arm portion 31 and the second arm portion 32 are extendable. However, the present invention is not limited to this, but the effect is limited, but the first arm portion 31 is not limited thereto. Alternatively, only one of the second arm portions 32 may be telescopic.

In the work assistance device 10 described here, the body part mounting tool 20 is a harness having a back pad part 21 to be mounted on the operator's back, a shoulder strap 22 provided on the back pad part 21, and a waist strap 23. The structure. When doing in this way, the operator can mount the body part mounting tool 20 without taking time and effort. Further, the shoulder strap 22 and the waist strap 23 prevent the back rest 21 from being separated from the operator's back, and the tip of the arm 30 fixed to the back rest 21 can be prevented from falling forward. . Note that a chest strap may be further provided on the body part mounting tool 20.

In the work auxiliary tool 10 described above, a glove that is worn on the operator's hand is adopted as the arm support tool 50. Since the operator only wears the glove as the arm support 50 in his / her hand, the arm support 50 can be easily attached / detached. Further, as another embodiment of the arm support 50, as shown in FIG. 2, a cylindrical band attached to the operator's forearm (this may be the upper arm) may be adopted. Good. This band is not limited to a cylindrical band, and may be a band that is used by wrapping a cloth material around a forearm (or upper arm). Further, the shape of the band adopted for the arm support 50 may be a C-shaped cross section and a flexible band along the longitudinal direction of the arm. Furthermore, as another embodiment of the arm support 50, as shown in FIG. 3, an annular grip that is gripped by the operator's hand may be employed. When a grip is employed for the arm support 50, the operator works by gripping the grip as the arm support 50 together with the front handle W2 of the hedge trimmer W. The grip is not limited to an annular shape, and various shapes such as an L shape and a rod shape may be employed.

In the above embodiment, the hedge trimmer has been described as an example of a handheld work machine. However, another example of a handheld work machine used by a worker who is assisted by the work assistance device 10 of the present invention is a brush cutter. Further, it may be a handheld gardening machine such as a chain saw, a handheld blower, or a gardening hair clipper, or a handheld electric tool (handheld working machine) such as a hammer, a hammer drill, or a driver. As can be understood from the above description, the work assisting device 10 of the present invention can reduce the load on the worker due to the load of the handheld work machine when the worker holds various types of handheld work machines. it can.

Claims

A torso mounting tool to be mounted on the torso of an operator working on a handheld work machine;
An arm connected to the body part mounting tool at the back of the worker, extending upward and forward from the body part mounting tool, and having a tip above the arm part of the worker;
A wire hanging from the tip of the arm;
An arm support that is suspended by the wire to be attached to the arm of the operator when the operator holds the handheld work machine,
A work assisting device, wherein an arm portion of the worker holding the hand-held work machine is supported by the arm portion support tool.
The work auxiliary tool according to claim 1,
The arm is made of a hollow tube,
A part of the wire is slidably inserted into the hollow tube material,
The body support device is provided with a work balance device which is connected to the wire and is provided with a spring balancer which pulls the wire with a predetermined load and pulls the arm support tool upward.
In the work assistance tool according to claim 1 or 2,
The arm includes a first arm part extending upward from the body part mounting tool, and a second arm part extending forward from a distal end part of the first arm part, and at least one of the first arm and the second arm. A work auxiliary device characterized in that one of the two is extendable.
The work auxiliary device according to any one of claims 1 to 3,
The said body part mounting tool is a work assistance apparatus characterized by the harness structure which has a back support part with which a worker's back is mounted | worn, a shoulder strap connected to the said back support part, and a waist strap.
The work auxiliary device according to any one of claims 1 to 4,
The work support device according to claim 1, wherein the arm support tool is a glove to be worn on the hand of the worker.
The work auxiliary device according to any one of claims 1 to 4,
The work support device according to claim 1, wherein the arm support is a cylindrical band attached to the forearm of the worker.
The work auxiliary device according to any one of claims 1 to 4,
The work support device according to claim 1, wherein the arm support is a grip that is gripped and attached by the operator's hand.