Lanyard hook cover and fall protection equipment

Abstract

To provide a lanyard hook cover that can arrest damage of a structure such as an insulator even if the hook oscillates.SOLUTION: A lanyard hook cover 10 is attached to the lanyard of a piece of fall arrest equipment and is capable of housing the hook of the lanyard. The lanyard hook cover 10 is formed from a material having impact buffering capacity, and is equipped with a body 11 for housing the hook. The body 11 has a first opening and a second opening, a first engaging member 13 arranged in the first opening, and a second engaging member 12 arranged in the second opening. When the first engaging member 13 and the second engaging member 12 are in the state of nonengagement, passage of the lanyard is allowed, and when the first engaging member 13 and the second engaging member 12 are in the engaged state, the discharge of the hook is suppressed.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a lanyard hook cover and a fall arrest device.

Background Art

[0002] At work sites at height, workers wear fall arrest devices to work in order to prevent workers from falling. As a fall arrest device, a torso belt type equipped with a rope lanyard is widely used. In a torso belt type fall arrest device, one end of a rope is connected to the torso belt via a shock absorber or the like, and a hook for locking to a main rope or the like is arranged at the other end of the rope (for example, Patent Documents 1 and 2).

[0003] For example, as shown in Fig. 11, at a work site for substation equipment at height, a hook 28 is locked directly to a main rope 40 attached to an insulator 50, or a rope 27 is wrapped around the main rope 40 and the hook 28 is locked to a connecting ring 26 or the like, so as to prevent the worker from falling.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problem to be Solved by the Invention

[0005] Since the hook arranged on the lanyard is made of sturdy metal, it has high weight and hardness. When the hook swings during work, it may come into contact with structures such as insulators and damage the structures.

[0006] The present invention has been made in view of the above matters, and its object is to provide a lanyard hook cover and a fall arrest device that can suppress damage to structures such as insulators even when the hook swings. [Means for solving the problem]

[0007] A lanyard hook cover according to a first aspect of the present invention is: A lanyard hook cover that is attached to the lanyard of a fall arrest device and capable of housing the hook of the lanyard, It comprises a body made of a material having shock-absorbing properties, and which houses the hook, The main body has a first opening and a second opening, A first locking member is positioned in the first opening, and a second locking member is positioned in the second opening. The first locking member and the second locking member are allowed to pass through when they are not locked, and the hook is prevented from being ejected when they are locked. It is characterized by the following:

[0008] Furthermore, the main body has an opening and closing section from which the lanyard can be removed. It is preferable that the first opening is formed by the opening / closing part.

[0009] A fall arrest device according to a second aspect of the present invention is: A fall arrest device equipped with a rope-type lanyard, A lanyard hook cover according to a first aspect of the present invention is attached to the aforementioned lanyard. It is characterized by the following: [Effects of the Invention]

[0010] According to the present invention, it is possible to provide a lanyard hook cover and a fall arrest device that can suppress damage to structures such as insulators even when the hook swings. [Brief explanation of the drawing]

[0011] [Figure 1] Fig. 1(A) is a plan view showing the closed state of the lanyard hook cover, and Fig. 1(B) is a cross-sectional view along A-A' in Fig. 1(A). [Figure 2] It is a plan view showing the open state of the lanyard hook cover. [Figure 3] It is a diagram explaining the method of using the lanyard hook cover in wrap-around anchoring. [Figure 4] It is a diagram explaining the method of using the lanyard hook cover in wrap-around anchoring. [Figure 5] It is a diagram explaining the method of using the lanyard hook cover in wrap-around anchoring. [Figure 6] It is a diagram explaining the method of using the lanyard hook cover in direct anchoring. [Figure 7] It is a diagram explaining the method of using the lanyard hook cover in direct anchoring. [Figure 8] It is a diagram explaining the method of using the lanyard hook cover in direct anchoring. [Figure 9] It is a diagram showing the usage state of a fall arrest equipment. [Figure 10] Figs. 10(A) and (B) are respectively a plan view showing an unlocked state and a plan view showing a locked state of a lanyard hook cover according to another embodiment. [Figure 11] It is a diagram showing the usage state of a conventional fall arrest equipment. MODE FOR CARRYING OUT THE INVENTION

[0012] (Lanyard Hook Cover) The lanyard hook cover according to the present embodiment will be described with reference to the drawings. As shown in Figs. 1 and 2, the lanyard hook cover 10 includes a main body 11, an opening / closing part 11a, a locking member 12, and a locking member 13. The lanyard hook cover 10 is used by being attached to a rope-type lanyard of a fall arrest equipment.

[0013] The main body 11 is shaped to be able to accommodate a lanyard hook, and is cylindrical herein. The main body 11 has two openings, one of which is locked by a locking member 12 to narrow the opening. The other opening is locked by a locking member 13 to narrow the opening.

[0014] The main body 11 has an opening / closing portion 11a, which facilitates inserting and removing the hook into and out of the main body 11. Herein, the opening / closing portion 11a is formed by cutting out a part of the main body 11, and has a shape that allows the hook to be inserted into and removed from the main body 11. Note that the opening / closing portion 11a may be a separate member joined to the main body 11 by stitching or the like.

[0015] The main body 11 and the opening / closing portion 11a exhibit impact buffering capability that mitigates impact and suppresses damage to an insulator even when the hook accommodated therein swings and contacts the insulator. The main body 11 and the opening / closing portion 11a may be formed of any material as long as the impact buffering capability can be achieved. For example, the main body 11 and the opening / closing portion 11a may be made of thick cloth, or a fabric such as cloth or sheet enclosing a buffer material such as urethane sponge or air packing.

[0016] The locking member 13 detachably locks the main body 11 and the opening / closing portion 11a. The locking member 13 suppresses discharge of the hook accommodated in the main body 11. Herein, the locking member 13 is a hook-and-loop fastener, provided at the edge of the opening / closing portion 11a and at a corresponding position of the main body 11.

[0017] The locking member 12 is disposed at one opening of the main body 11. The locking member 12 detachably locks the front surface and the back surface of the main body 11. In a state where the locking member 12 is locked, discharge of the accommodated hook and connection ring is suppressed. Herein, the locking member 12 is two snap buttons, and the interval between the two snap buttons is set to a degree that allows a rope or strap of a lanyard to pass therethrough.

[0018] (Fall arrest equipment) The fall protection equipment includes a rope-type lanyard, to which the aforementioned lanyard hook cover 10 is attached. As an example, Figure 3 shows a body belt type fall protection equipment 20. The fall protection equipment 20 includes a body belt 21 for wrapping around and securing to the worker's torso, a connecting ring 22 for attaching the lanyard 23, the lanyard 23, and the lanyard hook cover 10. The lanyard 23 includes a body belt connection part 24, a shock absorber 25, a connecting ring 26, a rope 27, a hook 28, and a swivel 29, to which the lanyard hook cover 10 is attached. The body belt 21, connecting ring 22, and lanyard 23 can be commercially available. It is preferable that the rope 27 and hook 28 of the lanyard 23 are connected by a swivel 29 to prevent twisting. It is also preferable that the body belt connection part 24 has a locking function with a safety device attached to a double hook. Furthermore, the connecting ring 26 directly or indirectly connects the shock absorber 25 and the rope 27, and, as described later, is preferably sized and shaped to accommodate the hook 28 in order to secure it when the rope is wrapped around.

[0019] The lanyard hook cover 10 can be attached by passing the lanyard 23 through it as shown in Figure 3 when the locking members 12 and 13 are not locked, and then locking the locking member 12 at the shock absorber 25 and connecting ring 26. The locking member 12 secures the lanyard hook cover 10 to the lanyard 23, preventing it from falling off.

[0020] Next, we will explain how to use the lanyard hook cover 10. First, we will explain how to use it by wrapping the lanyard 23 around it. As shown in Figure 4, wrap the rope 27 around the main rope 40. Then, attach the hook 28 to the connecting ring 26 and place it in a position where it can be housed in the main body 11.

[0021] Then, as shown in Figure 5, the hook 28 is housed in the main body 11 by closing the opening / closing part 11a and locking the opening / closing part 11a with the locking member 13. This prevents the hook 28 from being ejected from the main body 11.

[0022] Next, we will explain the case where the lanyard is used by attaching it directly to the main rope 40. As shown in Figure 6, the hook 28 is directly attached to the main rope 40.

[0023] Then, the locking members 12 and 13 are released, and the lanyard hook cover 10 is moved along the rope 27 as shown in Figure 7. The lanyard hook cover 10 is moved to a position where the hook 28 is housed in the main body 11.

[0024] Then, as shown in Figure 8, the locking member 12 is locked, and after closing the opening / closing section 11a, the locking member 13 is locked and the hook 28 is housed in the main body 11. This prevents the hook 28 from being ejected from the main body 11.

[0025] Figure 9 shows the use of the fall arrest device 20 during work at height. Here, the lanyard 23 is shown being used by directly attaching it to the main rope 40. The hook 28 of the lanyard is housed in a lanyard hook cover 10 which has shock absorption capabilities, so even if the hook 28 swings during work and comes into contact with the insulator 50, damage to the insulator 50 can be suppressed.

[0026] As described above, the lanyard hook cover 10 is suitable for both cases where the lanyard 23 is used by looping it around the hook and when it is used by directly hooking it. Furthermore, since the hook 28 can be kept housed in the shock-absorbing body 11, damage to the structure can be suppressed even if the hook 28 swings and comes into contact with a structure such as an insulator 50.

[0027] Furthermore, the lanyard hook cover 10 is versatile and can be applied to the lanyards of various fall protection devices.

[0028] Furthermore, the lanyard hook cover 10 can be modified in various ways as long as the above functions can be performed. For example, although the above description described an example where the locking member 12 is a snap button and the locking member 13 is a hook-and-loop fastener, it can take any form as long as the above functions can be performed. In addition to snap buttons and hook-and-loop fasteners, the locking members 12 and 13 may also be, for example, wire fasteners, clips, strings and fasteners, etc.

[0029] Furthermore, the shape of the main body 11 and the opening / closing part 11a may vary, as long as the function of the lanyard hook cover 10 is not impaired.

[0030] Furthermore, as shown in Figures 10(A) and (B), the lanyard hook cover 10 may not have an opening or closing mechanism. In the lanyard hook cover 10 shown in Figure 10, locking members 12 and 13 are arranged in two openings of a cylindrical body 11. Here, the locking member 12 is a combination of a string 12a and a fastener 12b. A passage for the string 12a is formed in the body 11, and the fastener 12b is attached to the string 12a. The fastener 12b is a known fastener equipped with a button and a spring, and the fastener 12b is movable along the string 12a when the button is pressed, and fixed so as not to move when the button is released. The locking member 13 is a wire fastener. When the locking members 12 and 13 are not locked, the lanyard, including the hook, can pass through, and when locked, the ejection of the contained hook is suppressed. [Explanation of Symbols]

[0031] 10 Lanyard Hook Covers 11 Main unit 11a Opening / closing part 12 Locking member 12a String 12b Fastener 13 Locking member 20 Fall arrest equipment 21 Waist belt 22 connecting ring 23 lanyards 24 Waist belt connection part 25 Shock absorbers 26 connecting rings 27 Rope 28 hooks 29 Swivel 40 Main rope 50 insulators

Claims

1. A lanyard hook cover that is attached to the lanyard of a fall arrest device and capable of housing the hook of the lanyard, It comprises a body made of a material having shock-absorbing properties, and which houses the hook, The main body has a first opening and a second opening, A first locking member is positioned in the first opening, and a second locking member is positioned in the second opening. The lanyard is allowed to pass when the first locking member and the second locking member are not locked, and the release of the hook is suppressed when the first locking member and the second locking member are locked. A lanyard hook cover characterized by the following features.

2. The main body has an opening / closing section from which the lanyard can be removed. The opening and closing portion forms the first opening. The lanyard hook cover according to feature 1.

3. A fall arrest device equipped with a rope-type lanyard, The lanyard is fitted with the lanyard hook cover described in claim 1 or 2. A fall arrest device characterized by the following features.

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