Fall prevention equipment

Abstract

To provide a fall prevention tool capable of improving workability and safety.SOLUTION: A first holding part 15 is provided for joining one end of a first lifting rope 13 to a first list belt 11 and attracting and holding the head of a bolt 10a to the other end with magnetic force. A second holding part 16 is provided for joining one end of a second lifting rope 14 to a second list belt 12 and attracting and holding the back of the seating face of a nut 10b to the other end with magnetic force. First and second attracting and fixing parts 17, 18 are provided for attracting the first and second holding parts to the first and second list belts with the magnetic force, respectively, to fix the other end of the lifting rope. The first and second list belt are mounted to both wrists of a worker, and the bolt and the nut are attracted to the first and second holding parts, and fastened by rotation, respectively. After work, the first and second holding parts are fixed to the first and second attracting and fixing parts, respectively.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a fall prevention device that prevents bolts and nuts from falling when assembling a structure using bolts and nuts. [Background technology]

[0002] Patent Documents 1 and 2 describe fall prevention devices that prevent bolts and nuts from falling when working at heights such as on steel towers.

[0003] In Patent Document 1, magnets are used to attract and hold the flat surface of the bolt head and the side of the nut, and a safety cord is used to attach the tool to a tool bag or a harness, preventing the bolts and nuts from falling during work.

[0004] On the other hand, in Patent Document 2, a bolt and a nut are housed and held in a blind hole so that they cannot rotate, and are attached to the worker's body or a surrounding structure with a coil wire. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 5424839 [Patent Document 2] Patent No. 4654226 Summary of the Invention [Problem to be solved by the invention]

[0006] However, as in Patent Document 1, when a safety cord is used to attach a tool bag or a harness, it is possible to prevent the bolts and nuts from falling, but there is a problem in that after the attachment work, the holding part and safety cord may swing and get in the way of the work, or the holding part may get stuck to a steel tower or the like.

[0007] On the other hand, Patent Document 2 discloses a configuration in which the hanging part is attached to a wristband, which is unlikely to get in the way of work or get stuck to steel towers or the like as in Patent Document 1, but once the fastening work with the bolt and nut is completed, the holding part hangs down from the wristband. This causes the holding part to swing around every time you move your hand, which is annoying and can even be dangerous as it could get caught on a structure.

[0008] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a fall prevention device that can improve workability and safety. [Means for solving the problem]

[0009] The fall prevention device according to the present invention comprises a pair of first and second wrist belts to be worn on the left and right wrists of a worker, first and second suspenders, one end of each of which is connected to the first and second wrist belts, a first holding part connected to the other end of the first suspender cord and which magnetically attracts and holds the head of a bolt, a second holding part connected to the other end of the second suspender cord and which magnetically attracts and holds the underside of the seat of a nut, a first attracting and fixing part provided on the first wrist belt and which magnetically attracts and fixes the first holding part, and a second attracting and fixing part provided on the second wrist belt and which magnetically attracts and fixes the second holding part. The first holding portion comprises a first magnet and a first bolt holding member made of a magnetic material that is interposed between the first magnet and the head of the bolt and into which the head of the bolt is fitted, and the second holding portion comprises a second magnet and a nut holding member made of a magnetic material that is interposed between the second magnet and the back surface of the seat of the nut and into which the nut is fitted. This solved the above-mentioned problem.

[0010] According to the above configuration, the first and second holding parts can be adsorbed and fixed to the first and second adsorption and fixing parts of the first and second wrist belts, respectively, so that the first and second holding parts can be fixed after the installation work. Furthermore, by interposing the bolt holding member and the nut holding member, when tightening the bolt and nut, the bolt and nut can be tightened by rotating the bolt holding member and the nut holding member, thereby improving workability.

[0011] This prevents the first and second holding parts from swinging and getting in the way after work, and also prevents them from getting caught on structures.When it's time to install the next bolt or nut, the first and second holding parts can be removed from the first and second suction fixing parts, and the bolt and nut can be attached to them, allowing for continuous work.

[0012] Furthermore, the above-mentioned problem is solved by further providing first and second swivels that are provided between the first and second holding parts and the first and second hanging cords, at the middle parts of the first and second hanging cords, or at the joint parts of the first and second hanging cords and the wrist belt, and that take up twists in the first and second hanging cords.

[0013] By providing the first and second swivels, when the first and second holding parts are rotated to fasten the bolt and nut, twisting and tangling of the first and second hanging cords due to rotation can be avoided, and the work of removing twists is also unnecessary.

[0014] In addition, the above-mentioned problem is also solved by further providing first and second take-up reels that are respectively provided on the first and second hanging cords and that take up the first and second hanging cords, respectively, when the first and second holding parts are held by the first and second suction fixing parts, respectively.

[0015] First and second take-up reels are provided, and when the first and second holding parts are held by the first and second suction fixing parts, respectively, the first and second hanging cords that hang down in a loop are wound up, eliminating slack in the hanging cords and preventing the hanging cords from getting caught on workers or structures, thereby improving work safety.

[0016] In addition, the first and second hanging cords are each an elastic safety cord, thereby solving the above-mentioned problem.

[0017] By using an elastic safety cord for the first and second hanging cords, when the first and second holding parts are held by the first and second suction fixing parts, respectively, the slack in the first and second hanging cords is reduced, preventing the hanging cords from getting caught on workers or structures, thereby improving work safety. [Effects of the Invention]

[0020] Therefore, according to the present invention, a fall prevention device can be provided that can improve workability and safety. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a perspective view showing a schematic configuration of a fall prevention device according to an embodiment of the present invention. [Figure 2] 2 is a perspective view showing the operation of fastening a bolt and a nut using the fall prevention device shown in FIG. 1. [Figure 3] 10 is a perspective view for explaining another example of the configuration of the first and second suction and fixing units. FIG. [Figure 4] 10 is a perspective view for explaining still another example of the configuration of the first and second suction and fixing portions. FIG. [Figure 5] 10A and 10B are perspective views for explaining modified examples of the first and second holding portions. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0023] 1 shows the schematic configuration of a fall prevention device according to an embodiment of the present invention. This fall prevention device is composed of a pair of first and second wrist belts (also called wrist bands or wrist straps) 11, 12, first and second hanging cords 13, 14, first and second holding parts 15, 16, and first and second suction fixing parts 17, 18.

[0024] The first and second wrist belts 11, 12 are worn on the worker's left and right wrists, respectively. In this example, flat belt fittings 11a, 12a are provided at one end of the belt-shaped belt, and the other end is folded back through these flat belt fittings 11a, 12a and fastened to the belt body using hook-and-loop fasteners 11b, 12b or the like.

[0025] One end 13a, 14a of each of the first and second suspending cords 13, 14 is connected to the first and second wrist belts 11, 12. The other end 13b, 14b of each of the first and second suspending cords 13, 14 is provided with first and second holding portions 15, 16.

[0026] The first holding portion 15 is formed of a button-shaped magnet and uses magnetic force to attract and hold the head of the bolt. The second holding portion 16 is also formed of a button-shaped magnet and uses magnetic force to attract and hold the backside of the nut seat. Because the first and second holding portions 15, 16 have the same shape, it is possible to hold the nut in the first holding portion 15 and the bolt in the second holding portion 16 depending on the ease of work and the position and arrangement of the bolt and nut to be fastened.

[0027] First attracting and fixing portion 17 is provided on the side surface of first wrist belt 11 and is made of a plate-shaped magnetic material, for example, an iron plate. First holding portion 15 is attracted and fixed to first attracting and fixing portion 17 by magnetic force. Second attracting and fixing portion 18 is provided on the side surface of second wrist belt 12 and is made of a plate-shaped magnetic material, for example, an iron plate. As shown by the two-dot chain line, second holding portion 16 is attracted and fixed to second attracting and fixing portion 18 by magnetic force.

[0028] Figure 2 shows the operation of tightening a bolt and a nut using the fall prevention device shown in Figure 1. First wrist belt 11 is worn on left wrist 100, and second wrist belt 12 is worn on right wrist 110. The head of bolt 10a is magnetically attracted and held by first holding part 15, and the backside of the bearing surface of nut 10b is magnetically attracted and held by second holding part 16. In this state, the first and second holding parts 15, 16 or bolt 10a and nut 10b are rotated with the fingertips of both hands to tighten them.

[0029] If necessary, a washer can be attached to the nut 10b by suction, and the washer can be interposed between the bolt 10a and the nut 10b.

[0030] Next, with the bolt 10a and the nut 10b locked together, the first holding part 15 is removed from the head of the bolt and fixed by being adsorbed to the first adsorption fixing part 17, and the second holding part 16 is removed from the nut and fixed by being adsorbed to the second adsorption fixing part 18.

[0031] Then, the bolt 10a and the nut 10b are tightened to the required torque using tools such as a spanner or various wrenches.

[0032] Next, the first holding part 15 is removed from the first suction fixing part 17, and the head of another bolt 10a is attracted and held by magnetic force, and the second holding part 16 is removed from the second suction fixing part 18, and the back surface of the seat of the nut 10b is attracted and held by magnetic force.

[0033] In this state, the first and second holding portions 15, 16 or the bolt 10a and nut 10b are rotated and locked with the fingertips of both hands, and the bolt 10a and nut 10b are tightened with the required torque using a tool.

[0034] Thereafter, the same fastening operation is repeated.

[0035] 3(a) and (b) show other configuration examples of the first attracting and fixing part 17. While a plate-shaped example is shown in Fig. 1, as shown in Fig. 3(a), a ring-shaped housing part 17b is formed in a plate-shaped part 17a. This housing part 17b may be made of a magnetic material or a non-magnetic material.

[0036] Then, as shown in FIG. 1(b), the first holding portion 15 is housed and fixed by suction to the plate-like portion 17a.

[0037] The second suction and fixing part 18 has a similar configuration.

[0038] 4(a) and (b) show still another example of the configuration of the first attracting and fixing part 17. While a plate-shaped example is shown in Fig. 1, as shown in Fig. 4(a), a columnar protrusion 17c is formed on a plate-shaped part 17a. This protrusion 17c may be made of a magnetic material or a non-magnetic material.

[0039] Then, as shown in FIG. 1(b), the annular first holding portion 15a is inserted into the protruding portion 17c and is fixed by suction to the plate-like portion 17a.

[0040] The second suction and fixing part 18 has a similar configuration.

[0041] Even with the configurations shown in FIGS. 3 and 4, the first and second holding portions 15 and 16 can be attracted and fixed by magnetic force in the same manner as in FIG.

[0042] 5 shows a modified example of the first holding part 15. A first swivel 19 is provided between the first holding part 15 and the first hanging cord 13. Although not shown, a second swivel is provided between the second holding part 16 and the second hanging cord 14.

[0043] Then, the first and second holding portions 15, 16 or the bolt 10a and nut 10b are rotated and locked with the fingertips of both hands, and the bolt 10a and nut 10b are tightened with the required torque using a tool.

[0044] The first and second swivels rotate freely as shown by the arrows even when the first and second holding parts 15, 16 (bolt 10a, nut 10b) rotate, preventing the rotational movement from being transmitted to the first and second hanging cords 13, 14.

[0045] In FIG. 5, the first and second swivels are provided between the first and second holding parts 15, 16 and the first and second hanging cords 13, 14, but they may also be provided in the middle parts of the first and second hanging cords 13, 14 or at the joints of the first and second hanging cords 13, 14 and the wrist belts 11, 12.

[0046] According to the configuration shown in FIG. 5, twisting and entanglement of the first and second suspension strings 13, 14 can be avoided when the bolt 10a and the nut 10b are fastened, and the work of removing twists can be eliminated.

[0047] The present invention is not limited to the above-described embodiment and modifications, and can be implemented in various modifications without departing from the spirit and scope of the present invention.

[0048] For example, first and second take-up reels may be provided to take up the first and second hanging cords 13 and 14, respectively, when the first and second holding parts 15 and 16 are held by the first and second suction and fixing parts, respectively.

[0049] When the first and second holding parts 15, 16 are held by the first and second suction fixing parts, respectively, the first and second hanging strings 13, 14 hanging down in a loop are wound up by the first and second winding reels, thereby eliminating slack in the hanging strings and preventing the hanging strings from getting caught on workers or structures, thereby improving work safety.

[0050] Further, the first and second hanging cords 13, 14 may be elastic safety cords.

[0051] Even in a configuration using an extendable safety cord, the slack in the first and second suspension cords 13, 14 can be reduced, preventing the first and second suspension cords 13, 14 from getting caught on a worker or a structure, thereby improving work safety.

[0052] Furthermore, the first retaining portion 15 can be composed of a first magnet and a first bolt retaining member made of a disk-shaped magnetic material that is interposed between the first magnet and the head of the bolt and into which the head of the bolt is fitted, and the second retaining portion 16 can be composed of a second magnet and a nut retaining member made of a disk-shaped magnetic material that is interposed between the second magnet and the back surface of the seat of the nut and into which the nut is fitted.

[0053] With this configuration, by interposing the bolt holding member and the nut holding member, when tightening the bolt and nut, the bolt holding member and the nut holding member can be rotated to tighten the bolt and the nut, improving workability. Workability can be improved by making the bolt holding member and the nut holding member easier to rotate with the fingertips by enlarging the outer shapes of the first and second holding portions 15, 16 or by providing grooves or checkering on the outer periphery. [Explanation of symbols]

[0054] 10a...Bolt 10b...Nut 11, 12...1st and 2nd wrist belts 11a, 12a...Flat belt fittings 11b, 12b...Hook and loop fastener 13, 14...First and second hanging cords 13a, 14a...One end of the first and second hanging cords 13b, 14b...other ends of the first and second hanging cords 15, 16...First and second holding parts 17, 18 First and second suction fixing parts 17a...Plate-shaped part 17b... Storage area 17c…Protrusion 19...First swivel 100...Left wrist 110...Right wrist

Claims

1. a pair of first and second wrist belts to be worn on the left and right wrists of the worker, respectively; first and second suspension straps, one end of each of which is connected to the first and second wrist belts; A first holding member is connected to the other end of the first hanging cord and holds the head of the bolt by magnetic attraction. With Mochibe, A second suspender is connected to the other end of the second suspender cord and holds the nut by magnetically attracting the back surface of the seating surface of the nut. 2 holding portions, a second wrist belt that is provided on the first wrist belt and that magnetically attracts and fixes the first holding portion; 1. an adsorption fixing unit; a second wrist belt that is provided with a magnetic attraction and fixes the second holding portion; and two suction fixing parts, A fall prevention device characterized in that the first retaining portion comprises a first magnet and a first bolt retaining member formed of a magnetic material that is interposed between the first magnet and the head of the bolt and into which the head of the bolt is fitted, and the second retaining portion comprises a second magnet and a nut retaining member formed of a magnetic material that is interposed between the second magnet and the back surface of the seat of the nut and into which the nut is fitted.

2. Between the first and second holding portions and the first and second hanging cords, The intermediate portion and the connecting portion of the first and second suspension cords with the wrist belt are provided. and, further comprising first and second swivels for removing twists in the first and second suspension cords. The fall prevention device according to claim 1 .

3. The first and second suspension cords are provided with the first and second holding portions, respectively. When the device is held by the first and second suction and fixing parts, the first and second hanging strings are wound up, respectively.

2. The fall prevention device according to claim 1, further comprising first and second take-up reels.

4. The first and second hanging cords are each an elastic safety cord. The fall prevention device according to claim 1.

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