JP3045351U - Lifeline connector for work at height - Google Patents

Abstract

(57) [Summary] [Problem] To connect a main line and a life line stretched between structures at a work place at a high place, and when the worker falls, the life line is pulled in any direction with respect to the main line. In addition, the present invention provides a connecting device that is securely locked to the main rope, withstands the impact load, and ensures the safety of workers. A body is formed by bending a plate-like body into a substantially U-shape. The main tightening member 4 is disposed in the concave portion of the main body. The fixing block 11 extends through the guide slit 5 of the main rope fastening member and is fixed between the opposing walls 2a and 2b of the main body. A leaf spring 7 is attached to the bottom wall of the main body recess. A connecting portion of the lifeline is provided at the tip of the main line fastening member. A through hole 13 is formed in the opposing wall of the main body.
The guide slit overlaps the parent rope through hole in a state where the parent rope tightening member is pushed into the main body concave portion against the elastic biasing force of the spring, and the parent rope tightening member is elastically urged outward from the concave part by the spring. It does not overlap the parent through hole in the state.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a connecting device for connecting a main line stretched between structures at a workplace at a height and a life line mounted on a worker.

[0002]

[Prior art]

 At an aerial work site, for example, as shown in FIG. 5, a worker wears a lifeline 40 to ensure safety in the event of a fall at a construction site of a house roof. Then, the worker connects the lifeline 40 to the master line 41 stretched on the roof to perform work. Therefore, a connecting tool 42 for connecting the lifeline 40 and the parent line 41 is required.

[0003] Conventionally, for example, a connector as shown in FIG. 4 has been used as such a connector. As shown in FIG. 4, both ends of a two-node triple link 25, 26, 27 in which a hook 22 is combined with shafts 23, 24 on both side walls 21, 21 of a rope insertion holding body 20, as shown in FIG. The parts are pivoted on the shafts 28 and 29 to form a four-node rotating link mechanism, and the lower ends of the left and right rotating links 25 and 27 are extended to provide a rope stopper 30.

[0004] The parent rope stretched on the roof is inserted into the rope insertion holder 20, and a hook at the tip of the life rope is connected to the hook 22. If the worker falls and the floating link 26 is pulled toward the hook 22, the rotating links 25 and 27 rotate around the shafts 28 and 29, respectively, so that the rope pawl 30 connects the parent rope. It is designed to press down and prevent dropping.

However, according to this connecting device, the effect of preventing the fall is obtained only when the lifeline is pulled in the direction of pulling the floating link 26 toward the hook 22 along the masterline. Rope pulling claw 30 cannot press the parent rope and cannot prevent the falling down even if the floating link 26 is pulled in the reverse direction along the . For this reason, for example, when working on the roof of a house, it is necessary to change the mounting direction of the connector to the parent rope when working on one side of the roof and when working on the other side, which is very difficult. Was complicated. In addition, this connector could be applied to a round rope-shaped master rope, but could not be applied to a flat belt-shaped master rope.

[0006]

[Problems to be solved by the invention]

 Therefore, the problem of the present invention is that the lifeline is connected to the lifeline by connecting the lifeline and the main line between the structures at the workplaces at high places. The present invention provides a connecting device that can be securely locked at a predetermined position on a master rope even when pulled in any direction, can withstand the impact load, and sufficiently secure worker safety. . Another object of the present invention is to provide a connector which can be applied to both a round rope-shaped master rope and a flat belt-shaped master rope.

[0007]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention relates to a connecting tool for connecting a main rope stretched between structures at a workplace at a high place and a lifeline attached to a worker, wherein a plate-like body is substantially used. A main body formed by bending an upper U-shape and a plate-like body, disposed so as to be able to be taken in and out of the concave portion of the main body, and having a guide slit formed in a side facing the opposing wall of the main body along the direction of taking in and out. A rope tightening member, a fixing block extending through the guide slit of the tightening member and fixed between opposing walls of the main body, and attached to a bottom wall of the concave portion of the main body, and the main rope tightening member is directed outward from the concave portion. An elastically biasing spring, a connecting portion for a lifeline provided at a tip portion of the mainline fastening member protruding from the concave portion of the main body, and a mainline through hole formed through an opposing wall of the main body, Guide slits are locked When the retaining member is pushed into the concave portion of the main body against the elastic biasing force of the spring, it overlaps with the through hole of the parent rope, and the parent tightening member is elastically outwardly biased outward from the concave portion by the spring. The connector is characterized in that it does not overlap with the through hole.

[0008] In the above configuration, preferably, the distance between the opposing walls of the main body gradually decreases from the bottom of the concave portion of the main body toward the opening, and the thickness of the main tightening member is equal to the thickness of the main tightening member at the opening. The size is added.

[0009]

[Embodiment of the invention]

 Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIGS. 1A and 1B are views showing a connector according to an embodiment of the present invention, wherein FIG. 1A is a partially cutaway front view, and FIG. 1B is a side sectional view taken along line XX of FIG. .

[0010] The connecting device according to the present invention is used to connect a main line stretched between structures at a work place at a high place and a life line mounted on an operator, and is shown in FIG. As described above, the main body 1 is formed by bending a metal plate into a substantially U-shape. In this case, the main body 1 is formed such that the distance between the opposing walls 2a and 2b gradually decreases from the bottom of the concave portion of the main body 1 toward the opening. The opposing side edges of the opposing walls 2a, 2b of the main body 1 are connected by a reinforcing member 3 over a certain length.

In the concave portion of the main body 1, a parent rope tightening member 4 made of a metal plate is arranged so as to be able to be taken in and out freely. At this time, at the opening of the concave portion of the main body 1, a gap corresponding to の of the thickness of the main rope is formed on both sides of the main rope fastening member 4. That is, the distance between the opposing walls 2a and 2b of the main body 1 is set to be equal to the thickness of the main rope fastening member 4 plus the thickness of the main rope at the opening of the concave portion of the main body 1. ing. Further, a guide slit 5 is formed in the main rope tightening member 4 along a direction in which the main body 1 faces the opposing walls 2a, 2b.

A leaf spring 7 is attached to the bottom wall 6 of the concave portion of the main body 1 by a rivet 8 so as to elastically urge the main line tightening member 4 outward from the concave portion.

A circular opening 9 that partially overlaps with the guide slit 5 of the main rope tightening member 4 is formed at a distal end of the main rope tightening member 4 protruding from the concave portion of the main body 1. The leading end of the main rope tightening member 4 is formed substantially in a ring shape, and forms a connecting portion 10 for a life rope mounted on an operator.

A fixing block 11 extends through the guide slit 5 of the main rope tightening member 4 and is fixed between the opposing walls 2 a and 2 b of the main body 1 by rivets 12. In this way, the main rope tightening member 4 is moved in and out of the concave portion of the main body 1 while the movement is regulated by the guide of the fixed block 11 in the guide slit 5.

The two side walls 2a and 2b of the main body 1 are formed with through holes 13 through which the parent rope passes. In this embodiment, it is planned to use a flat belt-shaped thing as the master rope. Therefore, the master rope through hole 13 has a rectangular cross section corresponding to the shape of the master rope. I have. The opening edge of each parent rope through hole 13 is rounded so as to prevent the parent rope from fraying.

The guide slit 5 overlaps with the parent through hole 13 in a state where the parent tightening member 4 is pushed into the recess of the main body 1 against the elastic biasing force of the leaf spring 7 (see FIG. 1). When the main rope tightening member 4 is elastically urged outward from the concave portion by the leaf spring 7, the main rope tightening member 4 does not overlap with the main rope passing hole 13. Saw-tooth irregularities are formed on the edge 5a of the guide slit 5 on the concave side of the main body 1.

A master rope guide rod 14 is joined to an opening edge on the bottom wall side of the main body 1 in the through hole 13 on the surface of the opposing walls 2 a and 2 b of the main body 1.

Next, a description will be given of a method of using the connector having the above-described configuration according to the present invention. 2 and 3 are side sectional views similar to FIG. 1B, showing a use state of the coupler shown in FIG.

First, the main rope tightening member 4 is pushed into the concave portion of the main body 1 by a worker's hand against the elastic biasing force of the leaf spring 7, and the guide slit 5 of the main rope tightening member 4 and the main tightening member 4 are closed. The stringing holes 13 are overlapped (see FIG. 1), and in this state, the flat belt-shaped parent rope is inserted through the parent rope passing hole 13 and the guide slit 5.

A hook at the tip of a lifeline attached to the worker is connected to the connecting portion 10 of the main line tightening member 4 or a hook fixed to a reel with an emergency stop lock mechanism that winds up the lifeline. Are linked. In the latter case, the hook at the end of the lifeline pulled out from the reel with the emergency stop lock mechanism is connected to the D ring of the belt worn by the worker.

When the hand is released from the main rope tightening member 4, the main rope tightening member 4 is pushed outward from the concave portion of the main body 1 by the elastic force of the leaf spring 7. Thereby, as shown in FIG. 2, the master rope 15 is pushed toward the concave opening of the main body 1 by the edge 5 a of the guide slit 5 of the main rope tightening member 4, and the inside of the main body 1 is closed. The connector is temporarily fixed to the master rope 15 at that position. In this manner, the connecting tool is moved along the main cable 15 with the main cable tightening member 4 being pushed into the recess of the main body 1 by hand, and when the connecting tool reaches a desired position, the main cable tightening member 4 is moved. By releasing the hand from 4, the coupling can be fixed in its position. In FIG. 2, reference numeral 16 denotes a hook at the tip of a lifeline attached to an operator or a hook fixed to a reel with an emergency stop lock mechanism that winds up the lifeline.

If the worker falls by slipping his / her foot, the hook 16 is pulled by the lifeline and the main line tightening member 4 is pulled out from the concave portion of the main body 1 as shown in FIG. At this time, even if the lifeline, and hence the hook 16 is pulled in any direction with respect to the masterline 15, the masterline fastening member 4 is pulled out from the concave portion of the main body 1. As a result, the main rope 15 is drawn into the gap between the main rope tightening member 4 and the opposing walls 2a and 2b of the main body 1, and bites between the main rope tightening member 4 and the opposing walls 2a and 2b of the main body 1 and is pinched. Is done. At the same time, the serrations of the edge 5 a of the guide slit 5 of the parent tightening member 4 bite into the parent rope 15.

In this case, the parent rope portion extending outward from the parent rope through hole 13 (the upper parent rope through hole 13 in FIG. 3) on the opposite side to the direction in which the life rope (hook 16) is pulled is a through hole of the parent rope. 13, it does not bend directly from the opening edge, but bends after partially contacting the outer circumference of the master rope guide rod 14, so that the emergency cut 15 of the master rope 15 is prevented, and furthermore, In addition, the bite of the parent rope 15 is more reliably performed. Further, since the space between the opposed walls 2a and 2b of the main body 1 is formed so as to gradually decrease from the bottom of the concave portion of the main body 1 toward the opening, the main rope 15 is connected to the main rope fastening member 4 and the main body. 1 is securely and sufficiently bitten between the opposing walls 2a, 2b and firmly sandwiched. In addition, the master rope 15 bites between the master rope tightening member 4 and the opposing walls 2a, 2b of the main body 1, and is firmly clamped.

In addition, even when the main rope 15 is too deeply bite between the main rope tightening member 4 and the opposing walls 2 a and 2 b of the main body 1, the main rope tightening member 4 has the guide slit 5. Is pressed against the fixing block 11 with the parent rope 15 interposed therebetween, the edge 5a is no longer pulled out of the concave portion of the main body 1 and the parent rope 15 is separated from the main rope fastening member 4 and the main body 1. Between the opposed walls 2a and 2b, and between the edge 5a of the guide slit 5 and the fixed block 11.

In this way, if the worker falls down by slipping the foot or the like, even if the hook 16 is pulled in any direction with respect to the parent rope 15 by the life rope, the connecting tool is not It is firmly locked to the rope 15, so that the worker can avoid falling.

In using this connecting device, it is necessary that the connecting device satisfies the safety belt standard of the Ministry of Labor. The following experimental results have been obtained. That is, a flat belt-shaped nylon belt having a width of 18 to 20 mm and a thickness of 4 to 4.5 mm is used as a master rope, a worker weighing 75 kg falls vertically 1.5 m, and the connecting device is used as a master rope. When the impact load when locked is measured, it is about 800 kgf. According to the safety belt standard by the Ministry of Labor, the impact load is 900 kgf or less, and this standard is satisfied. In addition, according to this standard, the strength of the safety belt must be able to withstand the impact of 1150 kgf, but the connecting device according to the present invention is also locked to the master rope when the worker falls. In this case, it has a strength that can withstand an impact of 1150 kgf.

In the above-described embodiment, the flat belt-shaped master rope is used. However, the connecting device of the present invention can be applied to a round rope-shaped master rope. In this case, the through hole 13 may be circular.

[0028]

[Effect of the invention]

 As described above, according to the present invention, the main line stretched between the structures at the work site at a high place and the life line mounted on the worker are connected, and the worker slides his / her foot and falls. In the event of an emergency, regardless of the direction in which the lifeline is pulled relative to the masterline, it is securely locked in place on the masterline and withstands the impact load, ensuring sufficient worker safety. Can be provided. Further, the connecting device according to the present invention can be applied to both a round rope-shaped master rope and a flat belt-shaped master rope.

[Brief description of the drawings]

FIG. 1 is a view showing a connector according to an embodiment of the present invention;
It is a sectional side view along the line.

FIG. 2 shows a state of use of the coupler shown in FIG. 1;
It is side sectional drawing similar to (B).

1. FIG. 3 shows a use state of the coupler shown in FIG.
It is side sectional drawing similar to (B).

FIG. 4 is a side view showing a conventional connecting tool for connecting a lifeline and a parent line.

FIG. 5 is a diagram showing an operation state in a conventional roof construction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2a, 2b Opposing wall 3 Reinforcement member 4 Main line tightening member 5 Guide slit 6 Bottom wall 7 Leaf spring 8 Rivets 10 Connecting part 11 Fixed block 13 Main line through hole 14 Main line guide rod 15 Main line

Claims (2)

[Utility model registration claims] 1. A connecting tool for connecting a main rope stretched between structures at a work place at a high place and a lifeline mounted on an operator, wherein the plate-like body is bent substantially into a U-shape. A main rope fastening member comprising a formed main body and a plate-like body, which is disposed so as to be able to be taken in and out of the concave portion of the main body, and has a guide slit formed on the side facing the opposing wall of the main body along the direction of taking in and out. A fixing block extending through a guide slit of the tightening member and fixed between opposing walls of the main body; being attached to a bottom wall of a concave portion of the main body, removing the master rope tightening member from the concave portion. A spring elastically biasing in a direction, a connecting portion for the lifeline provided at a tip portion of the mainline fastening member protruding from a concave portion of the main body, and a mainline pass-through formed through an opposing wall of the main body. Consisting of holes and The guide slit overlaps with the parent rope through hole in a state where the parent rope tightening member is pressed into the concave portion of the main body against the elastic biasing force of the spring, and the parent rope tightening member is formed by the spring. A connector which does not overlap with the parent rope passing hole in a state of being elastically urged outward from the concave portion. 2. The distance between the opposing walls of the main body gradually decreases from the bottom of the concave portion of the main body toward the opening, and the thickness of the main tightening member is added to the thickness of the main tightening member at the opening. The connecting tool according to claim 1, wherein the connecting tool has a size.