JP2007053835A - Falling prevention tool of cylindrical tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent falling of a cylindrical tool surely without restricting movement of the cylindrical tool more than required in high position work. <P>SOLUTION: The falling prevention tool comprises a falling prevention ring 31 formed by winding a string-like member 3 on the outer circumferential surface of a cylindrical tool 1 tightly at least one turn over the entire circumference and capable of changing between a loose state where the string-like member 3 slides on the outer circumferential surface of the cylindrical tool 1 and a tight state where the string-like member 3 adheres to the outer circumferential surface of the cylindrical tool 1, and a connection ring 32 concatenated with the falling prevention ring 31 such that an auxiliary rope 4 can be attached removably thereto. When a force intersecting the axial direction of the cylindrical tool 1 is applied to the falling prevention ring 31 through the auxiliary rope 4 and the connection ring 32, the falling prevention ring 31 changes from loose state to tight state thus holding the cylindrical tool 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a fall prevention tool for preventing falling by being attached to a rod-shaped tool, and in particular, for preventing a voltage detector, a grounding tool, or the like used in a high-place work on a high-voltage electric wire tower from dropping during the work. The present invention relates to a rod-shaped tool fall prevention tool.

  Conventionally, in order to perform inspection work using a voltage detector or grounding tool at a high place such as a steel tower of a high-voltage cable, the body part of the voltage detector or grounding tool can be divided into a plurality of parts. After storing it in a shoulder bag and climbing to the work place, the main body was added to assemble a voltage detector and grounding tool.

  For example, a grounding tool for 500 kV has five joints that are divided so that the length of one is about 1.5 m. Then, the grounding tool was transported to the work place in a divided state, and the workers were handed over to each other carefully, and assembled a grounding tool having a total length of about 7.5 m.

The weight of the grounding tool is about 12.5 kg including the ground wire and the grounding rod, and the weight of the grounding tool is about 2.5 kg per one in the divided state.
The grounding tool in the split state is not equipped with any fall prevention tool, and especially when the grounding tool is slippery as in rainy weather, particularly careful work is required.

  Conventionally, in high-altitude work, there has been proposed a fall prevention tool for connecting tools to an operator's arm or safety belt to prevent the tool from falling. For example, in Japanese Patent Application Laid-Open No. 9-272077 “Bracelet-type tool fall prevention device” of Patent Document 1, various tools such as a hammer, a driver, and pliers are dropped by using a string-like body having an annular member and a hook at both ends. Various techniques for preventing this have been proposed.

The bracelet type tool fall prevention device described in Patent Document 1 is provided with a hook that can be disconnected from the tool on one end side of the string-like body, and an annular portion on the other end side of the string-like body. Is. In order to use this bracelet type tool fall prevention tool, the string-like body is passed through the annular portion in a sliding state, the hand is passed through the formed loop portion, and the string-like body is pulled so as not to come off the wrist. The hook is connected to the tool.
In high-altitude work, even if the tool is separated from the hand, the tool is tied to the wrist by a string-like body, so that the danger of falling to the ground can be avoided.
Japanese Patent Laid-Open No. 9-272077

  However, the bracelet type tool fall prevention tool described in Patent Document 1 described above is for preventing the fall of tools such as lightweight hammers, drivers, pliers, etc. , It is designed to be received by the human body.

  Further, loosening of the bracelet portion is prevented by sliding resistance between the rough surfaces formed on the inner peripheral side outer surface of the annular portion and the outer surface of the string-like body. However, the string-like body is assumed to be used by being wound around the wrist, and does not produce a strong tightening force.

  As described above, a bar-shaped tool used at a high place such as a steel tower of a high-voltage electric wire has a weight of about 2.5 kg in a divided state, and is described in Patent Document 1 when the bar-shaped tool falls. It is too heavy to be received by the bracelet type tool fall prevention tool. In particular, when working at a high place such as a steel tower for high-voltage electric wires, you should not use a fall-preventing device that will cause the operator to lose balance.

  In addition, a rod-shaped tool used at a high place such as a steel tower of a high-voltage electric wire has a length of about 1.5 m in a divided state, and it is necessary to handle it freely to some extent when workers deliver it. is there. For this reason, when the bracelet type tool fall prevention tool described in Patent Document 1 is used, when the string-like body becomes too long and the rod-like tool falls, the rod-like tool is swung around and hits the operator. There is a risk.

In addition, using the bracelet type tool fall prevention device described in Patent Document 1, a method of inserting a rod-like tool into the bracelet part and hooking a hook provided on one side of the string-like body to a steel tower or the like is also considered. It is done.
However, as described above, the bracelet-type tool fall prevention device described in Patent Document 1 cannot generate a strong tightening force at the bracelet portion, so that the rod-like tool can be reliably prevented from falling. difficult.

  The present invention has been developed to solve the above-described problems. That is, an object of the present invention is to provide a fall prevention tool that can reliably prevent the rod-shaped tool from dropping without unnecessarily restricting the handling of the rod-shaped tool during work at a high place.

  According to this invention, it is a fall prevention tool (2) for attaching to a rod-shaped tool (1) and preventing fall, Comprising: A string-like member (3) is extended over the perimeter of the outer peripheral surface of a rod-shaped tool (1) at least. The string-like member (3) is formed so as to be tightly wound so that the string-like member (3) slides on the outer peripheral surface of the rod-like tool (1), and the string-like member (3) is the rod-like tool (1). A fall-preventing ring (31) that can be converted into a tightened state that is in close contact with the outer peripheral surface, and a connection ring (32) that is connected to the fall-preventing ring (31) and that can attach and detach the auxiliary rope (4). And when a force is applied to the fall prevention ring (31) through the auxiliary rope (4) and the connection ring (32) in a direction intersecting the axial direction of the rod-shaped tool (1), The fall prevention ring (31) is configured to convert from the relaxed state to the tightened state. Fall preventing device of the rod-like tool is provided, characterized in that.

The fall prevention ring (31) and the connection ring (32) are formed of a single string-like member (3) communicating with each other between the fall prevention ring (31) and the connection ring (32). A partition member for partitioning was attached.
A crimping sleeve (33) can be used as the partition member.

The said string-like member (3) can be made into a flat shape.
The said string-like member (3) can be comprised so that it may have a some protrusion part (34) in the position wound around the outer periphery of the said rod-shaped tool (1) at least.
It is preferable that the said string-like member (3) consists of an insulator.

  In the rod-shaped tool fall prevention device of the present invention, if the rod-shaped tool (1) is separated from the operator's hand during work at a high place, the rod-shaped tool (1) is connected via the auxiliary rope (4) and the connecting ring (32). ) Is applied in a direction intersecting the axial direction of the rod-shaped member, and the fall-preventing ring (31) is tightened, and the string-like member (3) is in close contact with the outer peripheral surface of the rod-like tool (1). Can be reliably prevented. On the other hand, in the normal working state, the fall prevention ring (31) is in a relaxed state, and the string-like member (3) slides on the outer peripheral surface of the rod-like tool (1), so that the rod-like tool (1) within the necessary range. Can be managed.

By manufacturing the fall prevention ring (31) and the connection ring (32) using a single string-like member (3) in communication, the fall prevention device (2) can be easily and inexpensively produced.
By using the crimp sleeve (33) as a member that partitions the fall prevention ring (31) and the connection ring (32), the fall prevention tool (2) can be manufactured more easily.

  By making the string-like member (3) flat, the frictional force between the string-like member (3) and the outer peripheral surface of the rod-shaped tool (1) can be increased, and the rod-shaped tool (1) can be more reliably dropped. Can be prevented. Moreover, the frictional force between the string-like member (3) and the outer peripheral surface of the rod-shaped tool (1) can be further increased by providing a plurality of protrusions (34) at positions wound around the outer periphery of the rod-shaped tool (1). It is possible to prevent the rod-shaped tool (1) from dropping more reliably.

  By constituting the string-like member (3) from an insulator, electrical insulation between the rod-shaped tool (1) and the fall prevention tool (2) can be achieved, and work can be performed safely.

  The rod-shaped tool fall prevention device of the present invention includes a drop-preventing ring formed by winding a string-like member so as to be in close contact with the entire circumference of the outer periphery of the rod-shaped tool, and a connecting ring connected to the fall-preventing ring. It has. This fall prevention device is used, for example, when assembling a rod-like tool such as a grounding rod on a high-voltage electric wire tower. Prior to work, one end of the auxiliary rope is connected to the connection ring, and the other end of the auxiliary rope Is connected to the tower.

  In a normal working state, the fall prevention ring is in a relaxed state, and the string-like member slides on the outer peripheral surface of the rod-shaped tool, and the rod-shaped tool can be handled within a necessary range. On the other hand, if the rod-shaped tool moves away from the operator's hand and a force is applied to the fall prevention ring in the direction intersecting the axial direction of the rod-shaped tool, the string-shaped member is tightly attached to the outer peripheral surface of the rod-shaped tool. The rod-shaped tool can be received by the auxiliary rope connected to the connection ring.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory view showing a state in which the fall prevention tool of Example 1 is attached to a rod-shaped tool. FIG. 2 is an explanatory view showing a state in which the rod-shaped tool to which the fall prevention tool of Example 1 is attached is viewed from above. FIG. 3 is a plan view of the fall prevention device of Example 1 when the fall prevention ring is in a relaxed state. FIG. 4 is a side view of the fall prevention device of Example 1 when the fall prevention ring is in a relaxed state. FIG. 5 is a plan view of the fall prevention device of Example 1 when the fall prevention ring is in a tightened state. FIG. 6 is a side view of the fall prevention device of Example 1 when the fall prevention ring is in a tightened state.

  As shown in FIG. 1, the fall prevention tool 2 of the first embodiment is used by being attached to the outer periphery of a grounding tool that is a bar-shaped tool 1. This grounding tool has a total length of about 7.5 m by adding five split rods 11 each having a length of about 1.5 m, and can be used when, for example, a 500 kV electric wire is grounded.

  As shown in FIG. 1, the fall prevention tool 2 is formed by folding the string-like member 3 around the outer peripheral surface of the split rod 11 and folding the end of the string-like member 3 into a ring shape. It comprises a connection ring 32 and a crimp sleeve 33 that partitions the fall prevention ring 31 and the connection ring 32.

  The string-like member 3 used for the fall prevention tool 2 of Example 1 is comprised by the Kevlar fiber which has insulation, for example, and the cross section is substantially circular shape. The material of the string-like member 3 may be any material as long as it has moderate flexibility and elasticity and can exert a frictional force with the rod-shaped tool 1.

  When using the fall prevention tool 2, the auxiliary rope 4 is connected to the connection ring 32. The auxiliary rope 4 is provided with a fall prevention hook 41 at each end. In FIG. 1, only the auxiliary rope 4 connected to the connection ring 32 is shown, but a fall prevention hook for attaching to a steel tower of a high-voltage electric wire or the like is also attached to the other end side of the auxiliary rope 4. . The length of the auxiliary rope 4 is appropriately changed according to the length of the grounding tool. The length of the auxiliary rope 4 is a length that allows the split rod 11 to be freely handled when the operators transfer the split rod 11 to each other. It is preferable to do.

  Each split rod 11 is provided with connecting portions 12 and 13 at both upper and lower ends. As shown in FIGS. 1 and 2, the upper connection portion 12 is a cylindrical member that covers the upper part of the main body of the split rod 11, and projects two connection pins 14 a and 14 b outward from the outer peripheral surface. It is provided. Both connection pins 14a and 14b are provided with an angle of about 90 ° in the circumferential direction while being separated in the vertical direction. As shown in FIG. 1, the lower connection portion 13 has a cylindrical shape into which the upper connection portion 12 can be inserted. The side connection portion 13 has an inverted L-shape for inserting the connection pins 14 a and 14 b on the side surfaces. Connection grooves 15a and 15b are provided.

  In addition, although it is preferable to provide the upper connection part 12 and the lower connection part 13 in all the division | segmentation hooks 11 at the point of connecting the division | segmentation hooks 11 easily, the upper side connection part of the division | segmentation hook 11 located in the uppermost end 12 can be omitted, and the lower connecting portion 13 of the split rod 11 located at the lowermost end can be omitted.

  In order to connect the upper and lower two split rods 11, 11, the connection pins 14 a, 14 b provided in the upper connection part 12 are provided at the lower ends of the connection grooves 15 a, 15 b provided in the lower connection part 13. After the upper connecting portion 12 is inserted into the lower connecting portion 13 with each other aligned, the respective dividing rods 11 are relatively rotated by about 90 ° to connect the connecting pins 14a and 14b to the upper right ends of the connecting grooves 15a and 15b. What is necessary is just to move to a part. On the other hand, in order to divide the rod-shaped tool 1 in the connected state, each dividing rod 11 may be rotated in the direction opposite to that at the time of connection, and the upper connection portion 12 may be pulled out from the lower connection portion 13.

A fall prevention tool 2 made of a string-like member 3 is attached to each split rod 11.
In order to attach the fall prevention device 2 to the split rod 11, the string-like member 3 is wound around the outer peripheral surface of the split rod 11 twice, the end of the string-like member 3 is folded into a ring shape, and the connection ring 32 is formed. The connection ring 32 may be inserted into the crimp sleeve 33 in the state, and the crimp sleeve 33 may be crimped by a crimper or the like at a position where the fall prevention ring 31 has an appropriate size.

  Thus, by winding the string-like member 3 around the outer circumferential surface of the split rod 11 twice, the string-like member 3 that adheres to the entire circumference of the outer circumferential surface of the divided rod 11 becomes less than about two rounds. The number of times of winding 3 is not limited to this. That is, the split collar 11 can be held by the fall prevention ring 31 by winding the string-like member 3 so as to be in close contact with the circumference of the outer circumference of the split collar 11 at least once. Therefore, the number of times of winding the string-like member 3 can be three or more.

  The size of the fall prevention ring 31 is appropriately changed according to the thickness of the split collar 11, and as shown in FIGS. 3 and 4, between the string-like member 3 and the outer peripheral surface of the split collar 11. A loose state in which the gap 5 is generated and the string-like member 3 slides on the outer peripheral surface of the split rod 11, and tightening in which the string-like member 3 is in close contact with the outer peripheral surface of the split rod 11 as shown in FIGS. Set to a size that can be converted into a state.

  At this time, the fall prevention ring 31 in the relaxed state abuts on the lower end portion of the upper connection portion 12 or the upper end portion of the lower connection portion 13 and does not fall off from the split rod 11. In particular, since the connection pins 14a and 14b exist in the upper connection portion 13, even if the split rod 11 slides down from the upper side to the lower side in a normal working state, the connection pins 14a and 14b prevent the fall prevention ring. It is possible to reliably prevent 31 from falling off.

  In a normal working state, since no force is applied to the connection ring 32, a gap 5 is generated between the string-like member 3 and the outer peripheral surface of the split rod 11, and the fall prevention ring 31 is in a relaxed state, and the string-like member 3. Slides on the outer peripheral surface of the split rod 11. In this state, the dividing rod 11 can be routed within a necessary range.

  On the other hand, when the split rod 11 is separated from the operator's hand, a force is applied in the direction intersecting the axial direction of the split rod 11 via the auxiliary rope 4 and the connection ring 32, and the fall prevention ring 31 is tightened. The string-like member 3 is in close contact with the outer peripheral surface of the split rod 11. In this state, the split rod 11 can be received by the auxiliary rope 4 connected to the steel tower of the high voltage electric wire, and the fall of the split rod 11 can be reliably prevented.

FIG. 7 is a partial perspective view of a string-like member used in the fall prevention device of the second embodiment.
As shown in FIG. 7, the string-like member 3 </ b> A used for the fall prevention tool 2 of Example 2 has a flat shape. Thereby, when it closely_contact | adheres to the outer peripheral surface of the division hook 11, the frictional force of the outer peripheral surface of the division hook 11 and the string-like member 3A increases, and the division hook 11 can be hold | maintained still more firmly.

FIG. 8 is a partial perspective view of a string-like member used in the fall prevention device of the third embodiment.
As shown in FIG. 8, the string-like member 3 </ b> B used for the fall prevention device 2 of the third embodiment has a flat shape, and a plurality of protruding portions 34 are provided on the side in contact with the outer peripheral surface of the split rod 11. Yes. Thereby, when it closely_contact | adheres to the outer peripheral surface of the division hook 11, the frictional force of the outer peripheral surface of the division hook 11 and the string-like member 3B further increases, and the division hook 11 can be hold | maintained still more firmly.

  The protruding portion 34 can be formed, for example, by fixing an elastic synthetic resin or the like to the surface of the string-like member 3. The projecting portion 34 may be provided over the entire string-like member 3, but may be provided only on one side contacting the outer peripheral surface of the split rod 11, or provided only on a portion contacting the outer peripheral surface of the split rod 11. May be.

  In addition, in the example mentioned above, while using the one string-like member 3 and using the crimping sleeve 33, the fall prevention tool 2 which partitioned off the fall prevention ring 31 and the connection ring 32 was explained in full detail. And the connection ring 32 are formed by separate string-like members 3, or the string-like member 3 is fastened at the boundary between the fall prevention ring 31 and the connection ring 32 without using the crimp sleeve 33. Of course, various modifications can be made without departing from the scope of the present invention.

  The rod-shaped tool fall prevention tool of the present invention is mainly used for preventing the rod-shaped tool 1 such as a voltage detector or a grounding tool from falling when performing work using a voltage detector or a grounding tool on a high-voltage electric wire tower. be able to.

It is explanatory drawing which shows the state which attached the fall prevention tool of Example 1 of this invention to the rod-shaped tool. It is explanatory drawing of the state which looked at the rod-shaped tool which attaches the fall prevention tool of Example 1 of this invention from the upper side. It is a top view of the fall prevention tool of Example 1 of this invention in case a fall prevention ring will be in a relaxed state. It is a side view of the fall prevention tool of Example 1 of this invention in case a fall prevention ring will be in a relaxed state. It is a top view of the fall prevention tool of Example 1 of this invention in case a fall prevention ring will be in a clamping | tightening state. It is a side view of the fall prevention tool of Example 1 of this invention when a fall prevention ring will be in a clamping | tightening state. It is a partial perspective view of the string-like member used for the fall prevention tool of Example 2 of the present invention. It is a partial perspective view of the string-like member used for the fall prevention tool of Example 3 of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bar-shaped tool 2 Fall prevention tool 3, 3A, 3B String-like member 4 Auxiliary rope 5 Crevice 11 Dividing rod 12 Upper connection part 13 Lower connection part 14a, 14b Connection pin 15a, 15b Connection groove 31 Fall prevention ring 32 Connection ring 33 Crimp sleeve 34 Projection 41 Drop prevention hook

Claims (6)

A fall preventer (2) for attaching to the rod-shaped tool (1) to prevent the fall,
The string-like member (3) is formed by winding the string-like member (3) so as to be in close contact with the entire circumference of the outer circumference of the rod-shaped tool (1). A fall prevention ring (31) that can be converted into a relaxed state that moves and a tightened state in which the string-like member (3) is in close contact with the outer peripheral surface of the rod-like tool (1)
A connection ring (32) connected to the fall prevention ring (31) and capable of attaching and detaching the auxiliary rope (4);
When a force is applied to the fall prevention ring (31) through the auxiliary rope (4) and the connection ring (32) in a direction crossing the axial direction of the rod-like tool (1), the fall A preventive tool for a rod-shaped tool, wherein the prevention ring (31) is configured to convert from the relaxed state to the tightened state. The fall prevention ring (31) and the connection ring (32) are composed of a single string-like member (3) in communication,
The rod tool fall prevention tool according to claim 1, wherein a partition member for partitioning both of the fall prevention rings (31) and the connection ring (32) is attached. The rod-shaped tool fall prevention device according to claim 2, wherein the partition member comprises a crimp sleeve (33). The rod-shaped tool fall prevention device according to claim 1, wherein the string-like member (3) has a flat shape. The rod-shaped tool fall prevention tool according to claim 1, wherein the string-shaped member (3) has a plurality of projecting portions (34) at least at positions wound around the outer periphery of the rod-shaped tool (1). The rod-shaped tool fall prevention device according to claim 1, wherein the string-like member (3) is made of an insulator.

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