JP2018001360A - Fall prevention device of tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fall prevention device of a tool which can connect a tool through an attaching hole and can release the connection easily, and can securely connect the tool without being removed unexpectedly.SOLUTION: A fall prevention device of a tool includes a first hook tool 5 on a worker side, a second hook tool 6 on a tool 4 side, and a cable member 8 for connecting them. A lock ring 41 is interposed between the second hook tool 6 and the tool 4. The lock ring 41 includes a pair of hook parts 45 which can be inserted in an attaching hole 16 formed on the tool 4. The pair of hook parts 45 can open and close freely between a closed state X in which tip end parts 45a close in a ring shape, and an open state Y in which the tip end parts 45a separates from each other and open, and are connected with each other so as to be locked in the closed state X when the second hook tool 6 is engaged with the lock ring 41.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tool fall prevention tool that prevents a tool from falling from an operator side.

The tool fall prevention tool for preventing the tool from falling includes a first hook tool connected to the operator's waist belt, a second hook tool connected to the tool side, and a first hook tool. And a cord member such as a stretchable spiral cord that connects the second hook device and the second hook device.
This type of conventional tool fall prevention tool is provided with a double ring interposed between the second hook tool and the tool. The double ring is composed of a double circular ring made of an elastic wire. It is formed in a shape, inserted into an attachment hole provided in the tool from its end, and engaged with the second ring, and the second hook is engaged with the double ring (for example, Patent Document 1). , 2).

  Another conventional tool fall prevention tool is provided with a wire ring interposed between the second hook tool and the tool, and the wire ring has a retaining member and a ring projecting from the retaining member. The annular wire is inserted into an attachment hole provided in the tool, is prevented from being removed by a retaining member, and the second hook is engaged with the annular wire (for example, Patent Document 3). .

JP 2012-166280 A Japanese Utility Model Publication 2-48221 JP 2014-159061 A

However, conventionally, in the former case, particularly when the thickness of the portion where the tool mounting hole is provided is large, it is difficult to insert and engage the double ring in the mounting hole, and the double ring can be attached and detached. It was very cumbersome and the tool could not be easily connected or disconnected from the fall prevention device.
In the latter case, when the usage frequency is increased, the annular wire may be rubbed and broken, which may cause the tool to come off from the drop prevention tool unexpectedly.

  In view of the above problems, the present invention is a tool that can easily connect or disconnect a tool through an attachment hole, and can securely connect the tool without fear of accidental disconnection. The purpose is to provide a fall prevention device.

Specific means for solving the problems in the present invention are as follows.
The technical means of the present invention for solving this technical problem includes a first hook device 5 connected to the operator side, a second hook device 6 connected to the tool 4 side, a first hook device 5 and a first hook device. In the tool fall prevention tool provided with the rope member 8 that connects the two hook tools 6,
A lock ring 41 interposed between the second hook device 6 and the tool 4 is provided. The lock ring 41 has a pair of hook portions 45 that can be inserted into the mounting holes 16 provided in the tool 4. The hook portion 45 is openable and closable in a closed state X in which the tip portions 45a are closed to form a ring shape and an open state Y in which the tip portions 45a are opened apart from each other. It is in the point which is mutually connected so that it may lock in closed state X, if 6 is engaged. In addition, other technical means of the present invention are the first hook device 5 connected to the worker side, the second hook device 6 connected to the tool 4 side, the first hook device 5 and the second hook device. In the tool fall prevention tool provided with the rope member 8 which connects 6 to,
A lock ring 41 interposed between the second hook device 6 and the tool 4 is provided, and the lock ring 41 is inserted into a mounting hole 16 provided in the tool 4 and a base side of the hook portion 45. Provided with a pair of ring components 43 each having a pivotal portion 46 and an interlocking portion 47 projecting from the pivotal portion 46, and the hook portions 45 of the pair of ring components 43 are formed in an arc shape that bends in opposite directions. The pair of interlocking portions 47 are provided with corresponding insertion holes 48,
The pair of hook portions 45 opens and closes in a closed state X in which the tip portions 45a are overlapped to form a ring shape and an open state Y in which the tip portions 45a are opened apart from each other, and the insertion holes of the pair of interlocking portions 47 The pivot portions 46 are pivotally supported around the pivot shaft 50 so as to be locked in the closed state X when the second hook member 6 is engaged with 48.

Further, according to another technical means of the present invention, the pair of ring structural bodies 43 are each formed in a plate shape from stainless steel, and the pair of pivot portions 46 are superposed in the thickness direction so as to be around the support shaft 50. It is in the point pivoted so that it can swing freely.
Further, according to another technical means of the present invention, the rope member 8 is formed of an expandable / contractible spiral cord, and the second hook 6 closes the hook 17 and the opening of the hook 17 so as to be freely opened and closed. A tool body 20 having a closing piece 18 and a connection ring 22 connected to the tool body 20, and the connection ring 22 is connected to the end of the rope member, and the hook 17 is engaged with the lock ring 41. The opening of the hook 17 is closed by the closing piece 18.

According to the present invention, when a lock ring is attached to a tool, a pair of hook portions are opened and the tip portions thereof are separated from each other, so that the hook portion can be attached even to a tool having a considerably thick portion. The mounting hole can be easily inserted and engaged, and the pair of hook portions can be easily removed from the mounting hole.
In addition, after the hook portion is inserted into the mounting hole, when the pair of hook portions are closed and the second hook device is engaged with the lock ring, the pair of hook portions are locked in the closed state in which the tip portions are closed. Therefore, it is possible to prevent the hook portion from being unexpectedly detached from the tool.

  Therefore, the tool can be easily connected to or disconnected from the fall prevention tool by the lock ring, and the tool can be reliably connected to the fall prevention tool without any risk of accidental disconnection.

It is a whole front view of the fall prevention tool which shows 1st Embodiment of this invention. It is a perspective view of the state which connected the tool to the waist belt with the fall prevention tool. It is a front view of the open state of the lock ring. It is a top view of the lock ring. It is a front view of the lock ring. It is a left view of the lock ring. It is a right view of the lock ring. It is a bottom view of the lock ring. It is a rear view of the lock ring. It is the sectional view on the AA line of the same FIG. It is a front view of the fall prevention tool which shows 2nd Embodiment. It is a front view of the open state of the lock ring.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 10 show an embodiment of the present invention. 1 to 2, the tool fall prevention tool 1 includes a first hook tool 5 connected to the operator's waist belt 3 (worker side), a second hook tool 6 connected to the tool 4, An elongated wire member 8 that connects the first hook device 5 and the second hook device 6 is provided. The rope member 8 is composed of a retractable spiral cord, the first hook member 5 is connected to one end portion of the rope member 8, and the second hook member 6 is connected to the other end portion of the rope member 8. .

  Here, the waist belt 3 (safety belt) to which the fall prevention device 1 is attached includes a belt body 13 that is detachably attached to the operator's waist, as shown in FIG. A plurality of tool sack 15 for storing and holding a plurality of tools 4 such as a hammer, a monkey wrench, a screwdriver, a pliers, and an electric drill are attached. The tool 4 is provided with an attachment hole 16 for connecting to the fall prevention tool 1.

  The first hook device 5 is constituted by a metal fitting called a so-called NASKAN, and the first hook device 5 includes a hook 17 and a closing piece 18 for closing the opening of the hook 17 so as to be freely opened and closed. 20 and a connecting ring 22 rotatably supported around the mounting shaft 21 on the tool body 20, and the closing piece 18 is formed in a ring shape by an elastic wire and closes the opening of the hook 17 (in the figure). Both ends thereof are engaged with the tool body 20 so as to generate a biasing force in the direction of arrow a). The first hook 5 is detachably connected to the retaining ring 14 of the operator's waist belt 3 via a hook 17.

  As in the case of the first hook device 5, the second hook device 6 is formed of a metal fitting called a so-called eggplant, and includes a hook 17 and a closing piece 18 for closing the opening of the hook 17 so as to be freely opened and closed. The tool body 20 has a connecting ring 22 rotatably supported around the mounting shaft 21 on the tool body 20, and the closing piece 18 is formed in a ring shape by an elastic wire and closes the opening of the hook 17. Both end portions of the second hook member 6 are engaged with each other so as to generate an urging force, and when the hook 17 of the second hook member 6 is engaged with a lock ring 41 described later, the hook 17 is closed by the closing piece 18. The opening is closed. The second hook device 6 is detachably connected to the tool 4 by a hook 17 via a lock ring 41 described later.

The spiral cord constituting the rope member 8 is formed by winding around a core wire obtained by twisting a large number of thin stainless steel wires with a polyurethane covering and winding it in a spiral shape. Is extended to about 5 to 8 times, and the original contracted state is restored by releasing the tensile force.
A first loop portion 33 is provided at one end portion of the rope member 8, a second loop portion 34 is provided at the other end portion, and the first loop portion 33 is connected to the connection ring 22 of the first hook device 5 in a chain shape. Thereby, the one end part of the rope member 8 and the 1st hook tool 5 are connected flexibly. The 2nd loop part 34 is connected with the connection ring 22 of the 2nd hook tool 5 at chain shape, and, thereby, the other end part of the rope member 8 and the 2nd hook tool 6 are connected flexibly.

The first loop portion 33 and the second loop portion 34 of the strip member 8 are folded in two at the end side of the spiral cord, leaving the ring-shaped bent portion and the folded end portion. It is formed by externally fitting and crimping (crimping) a metallic cylindrical body 36 to the curved base. A flexible synthetic resin-coated cylindrical body 37 is externally fitted on the cylindrical body 36.
A lock ring 41 interposed between the second hook tool and the tool 4 is provided.

  1 and 3 to 10, the lock ring 41 includes a pair of ring structures 43. Each ring structure 43 is formed in a plate shape from stainless steel. The hook portion 45 can be inserted into the mounting hole 16 provided in the tool 4, the pivot portion 46 provided on the base side of the hook portion 45, and the pivot portion 46. The ring portion 43 is integrally formed with an interlocking portion 47 protruding to the opposite side from the hook portion 45, and the hook portion 45, the pivotally supporting portion 46 and the interlocking portion 47 of each ring structure 43 are formed in a continuous plate shape, and a pair of rings The structure 43 is line-symmetric with respect to the left and right, and another ring structure 43 can be formed by reversing the ring structure 43 having the same shape so that the left and right and the front and back are reversed. The hook portions 45 of the pair of ring structures 43 are formed in an arc shape that is slightly flattened back and forth, and the tip portion 45a is formed in an arc shape that gradually decreases in width toward the tip. It is easy to insert into the mounting hole 16. An insertion hole 48 is provided in correspondence with the pair of interlocking portions 47.

  The pair of pivot portions 46 are overlapped with each other in the plate thickness direction and are lightly fastened and fixed by bolts and nuts 49, and are pivotally supported around a pivot 50 composed of the bolt shafts of the bolts and nuts 49. The pair of hook portions 45 opens and closes in a closed state X in which the tip portions 45a are overlapped to form a ring shape and an open state Y in which the tip portions 45a are opened apart from each other, and the pair of interlocking portions 47 are inserted. When the second hook device is engaged with the hole 48, it is locked in the closed state X.

Thus, the lock ring 41 has a pair of hook portions 45 that can be inserted into the mounting holes 16 provided in the tool 4, and the pair of hook portions 45 are closed in a ring shape by closing the tip portions 45 a thereof. The state X and the open state Y that the tip portions 45a are spaced apart from each other can be opened and closed freely, and are connected to each other so that when the second hook device 6 is engaged with the lock ring 41, the closed state X is locked. Yes.

  According to the first embodiment, when working at a high place, for example, by engaging the hook 17 of the first hook device 5 with the retaining ring 14 of the waist belt 3 attached to the waist of the operator, a plurality of hooks 17 are engaged. Are connected to a plurality of tools 4 such as a hammer, a monkey wrench, a screwdriver, a pliers, and an electric drill, respectively. The plurality of tools 4 are connected to each other via a lock ring 41 and stored and held in the tool sack 15 of the waist belt 3.

When working, the desired tool 4 may be taken out from the tool sack 15 and the tool 4 may be held in the hand. At this time, the rope member 8 is pulled in the longitudinal direction and stretched about 5 to 8 times by elastic deformation, so that the work can be smoothly performed with the tool 4 held in the hand.
At this time, even if the tool 4 is unexpectedly detached from the hand, the tool 4 is connected to the operator's waist belt 3 by the rope member 8, so that the tool 4 is surely dropped from a high place. Can be prevented.

  And when attaching the lock ring 41 to the tool 4 in order to connect the tool 4 to the other end part of the rope member 8, as shown in FIG. By separating the tip portions 45a from each other, the hook portion 45 can be easily inserted into and engaged with the attachment hole 16 even with respect to the tool 4 in which the portion provided with the attachment hole 16 is considerably thick, and the pair of hook portions 45 Can be easily removed from the mounting hole 16.

  Further, after the hook portion 45 is inserted into the mounting hole 16, when the pair of hook portions 45 are brought into the closed state X and the second hook device 6 is engaged with the lock ring 41, the closing piece 18 of the second hook device 6. Thus, the opening portion of the hook 17 is closed, and the pair of hook portions 45 are locked in the closed state X in which the tip portions 45a are closed, so that the hook portion 45 can be prevented from being accidentally detached from the tool 4.

Therefore, the tool 4 can be easily connected to or disconnected from the fall prevention tool 1 by the lock ring 41, and the tool 4 can be securely connected to the fall prevention tool 1 without the risk of accidental disconnection. Can do.
11 and 12 show the second embodiment, the shape of the lock ring 41 is changed, the pair of hook portions 45 are formed in a larger arc shape than in the case of the first embodiment, and the mounting holes 16 are formed. The hook portion 45 can be easily inserted into and engaged with a tool 4 having a larger thickness, such as a screwdriver shown in FIG. 2, for example. The other points are the same as those in the first embodiment.

In the above-described embodiment, the lock ring 41 is configured such that the pair of hook portions 45 are in the closed state X in which the tip portions 45a are overlapped to form a ring shape. You may make it the front-end | tip parts 45a of 45 contact | abut or approach, and you may make it a closed state.
Moreover, in the said embodiment, although the interlocking | locking part 47 of a pair of ring structure 43 protrudes in the opposite side to the hook part 45 from the pivotal support part 46, it replaces with this and a pair of ring structure is replaced with this. 43 interlocking portions 47 may be protruded from the pivotal portion 46 toward the hook portion 45, or may be projected from the pivotal portion 46 in the left-right direction or other directions, or may be bent in the thickness direction. .

  In the above-described embodiment, the lock ring 41 is pivotally supported so that the pair of pivot portions 46 can swing around the pivot shaft 50, and the pair of hook portions 45 can be opened and closed in a closed state X and an open state Y. However, instead of this, for example, the one hook part 45 side and the other hook part 45 side of the lock ring 41 are supported so as to be relatively slidable and slid to one side. You may comprise so that the hook part 45 will be in the closed state X, and if it is made to slide to the other side, it will be in the open state Y.

Moreover, in the said embodiment, although the rope member 8 is comprised with the elastic | stretchable elastic cord, it may replace with this and may be comprised with an elastic rubber cord, a chain, a linear cord, etc. instead.
Moreover, in the said embodiment, although the 1st hook tool 5 and the 2nd hook tool 6 are comprised by the metal fittings called what is called a NASKA, instead of this, the 1st hook tool 5 or the 2nd hook tool 6 is used. You may make it comprise a hook made of synthetic resin or the like having a simpler structure.

  In addition, the lock ring 41 of the said embodiment can be used also as back | bags other than a tool fall prevention tool, a key holder, and other connection metal fittings.

DESCRIPTION OF SYMBOLS 1 Fall prevention tool 5 1st hook tool 6 2nd hook tool 8 Cable member 16 Mounting hole 41 Lock ring 43 Ring structure 45 Hook part 45a Tip part 46 Pivoting part 47 Interlocking part 48 Insertion hole 50 Support shaft X Closed state Y Open state

Claims (4)

A first hook device (5) connected to the worker side, a second hook device (6) connected to the tool (4) side, a first hook device (5) and a second hook device (6); In the tool fall prevention tool provided with the rope member (8) for connecting the
A lock ring (41) interposed between the second hook device (6) and the tool (4) is provided, and the lock ring (41) is inserted into a mounting hole (16) provided in the tool (4). It has a pair of possible hook parts (45), and the pair of hook parts (45) is in a closed state (X) in which the tip parts (45a) are closed to form a ring shape and the tip parts (45a) are separated from each other. And can be opened and closed in an open state (Y), and is connected to each other so that when the second hook device (6) is engaged with the lock ring (41), the lock state is locked in the closed state (X). A tool for preventing the fall of the tool. A first hook device (5) connected to the worker side, a second hook device (6) connected to the tool (4) side, a first hook device (5) and a second hook device (6); In the tool fall prevention tool provided with the rope member (8) for connecting the
A lock ring (41) interposed between the second hook device (6) and the tool (4) is provided, and the lock ring (41) is inserted into a mounting hole (16) provided in the tool (4). A pair of ring structures (43) having a possible hook part (45), a pivot part (46) provided on the base side of the hook part (45), and an interlocking part (47) protruding from the pivot part (46). The hook portions (45) of the pair of ring structural bodies (43) are formed in arc shapes that bend in opposite directions, and the pair of interlocking portions (47) are provided with corresponding insertion holes (48). And
The pair of hook portions (45) opens and closes in a closed state (X) in which the tip portions (45a) are overlapped to form a ring shape and an open state (Y) in which the tip portions (45a) are opened apart from each other. In addition, when the second hook device (6) is engaged with the insertion holes (48) of the pair of interlocking portions (47), the pivot portions (46) are supported by the support shaft (46) so that they are locked in the closed state (X). 50) A tool fall prevention device characterized by being pivotably supported around the tool.   The pair of ring structural bodies (43) are each formed in a plate shape from stainless steel, and the pair of pivot portions (46) are superposed in the thickness direction so as to be pivotable about the pivot shaft (50). The tool fall prevention tool according to claim 2, wherein the tool fall prevention tool is supported.   The cord member (8) is formed of a retractable spiral cord, and the second hook device (6) is a closing piece (18) for closing the opening of the hook (17) and the hook (17) so as to be freely opened and closed. ) And a connecting ring (22) connected to the tool main body (20). The connecting ring (22) is connected to the end of the rope member (8), and a hook ( 4. The device according to claim 1, wherein the opening of the hook is closed by the closing piece when the lock ring is engaged with the lock ring. Tool fall prevention tool described in 1.

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