JP3171756U - Fall prevention tool - Google Patents

Abstract

Provided is a plate-like fall prevention tool for preventing a screw or bolt from dropping in a high-place work or the like. A plate body made of synthetic resin having flexibility and elasticity, and a first latching hole formed in the plate body and set to a diameter equal to or less than the length of a shaft diameter of a screw or bolt. And a notch portion 4 for introduction that is set to a width shorter than the diameter of the first latching hole that opens by connecting the first latching hole and the end of the plate body, and one end is held in place. The second retaining hole 7 is detachably connected to the other end of the connecting member 19. Further, the pair of pieces 4a and 4b forming the notch for introduction are twisted to widen the gap, and the shaft portion 12 of the held member is inserted into or removed from the first hooking hole. [Selection] Figure 1

Description

  The present invention relates to a plate-like fall prevention device for preventing the fall of mounting screws and bolts used for assembling and repairing various members and devices in high-altitude work and the like.

2. Description of the Related Art Conventionally, as a fall prevention tool for screws and bolts, for example, in the fall prevention tool disclosed in Japanese Patent Application Laid-Open No. 2009-41741, a holding part that holds a bolt or a nut and a suspension that is connected to the holding part and can suspend the holding part. It has been known that the holding portion has a cylindrical body having one end opened, and a bolt or a nut is held by the cylindrical body.
However, it was bulky by making it into a cylinder, and it was necessary to remove it after tightening screws and bolts.
Japanese Patent Application Laid-Open No. 10-184462 discloses a structure for preventing a fall by connecting to a bolt head or a nut using a ring made of an elastic material. However, there is a similar problem.

JP 2009-41741 A Japanese Patent Laid-Open No. 10-184652

  The problem to be solved by the present invention is to provide a plate-like fall prevention device capable of detachably hanging screws and bolts without being bulky.

The present invention provides a first latching hole for latching a shaft portion that contacts a screw or bolt head on one side of the plate body, and a second latch for latching a detachable hook on the plate body on the other side. A hole is formed, and an elastic member such as a coiled string is connected to the hook.
In the device of claim 1,
A plate body made of synthetic resin having flexibility and elasticity;
A first retaining hole that is drilled in the plate body and set to a diameter that is equal to or less than the length of the shaft diameter of the member to be held made of screws or bolts;
A notch for introduction set to a width shorter than the diameter of the first hooking hole that opens by connecting the first hooking hole and the end of the plate body;
It consists of a second retaining hole detachably connected to the other end of the connecting member whose one end is held in place,
The pair of pieces forming the notch for introduction are twisted to widen the gap, and the shaft portion of the held member is inserted into or removed from the first retaining hole.
In the device of claim 2,
The plate body has a substantially rectangular shape, and the first and second retaining holes are spaced apart from each other along a center line extending in the longitudinal direction,
The introduction notch extends from one side edge in the longitudinal direction of the plate body toward the first retaining hole, and the introduction notch extends from the midway position toward the side edge of the plate body. A tapered first guide edge that gradually expands in an arc shape, and a tapered second guide edge that gradually expands in an arc shape from the midway position toward the first retaining hole. It is characterized by being.
In the device of claim 3,
The connecting member has a stretchable part made of a coiled string in whole or in part, and is provided with a hook that can be closed or opened by being inserted into the second hooking hole at the tip. And

In the fall prevention device of the present invention, the connecting member is locked to the second retaining hole, and the retained member made of a screw or a bolt is retained in the first retaining hole. Since the bolt can be held, there is no possibility that the screw or the bolt will drop when tightening or removing.
Further, if necessary, the drop holder may be fastened while being hooked on the shaft that is in contact with the head of the screw or bolt. In that case, the hook may be removed from the second hook hole.

It is a perspective view which shows the use condition of a fall prevention tool. It is a perspective view of the fall prevention tool of Example 1. FIG. It is a perspective view of the fall prevention tool of Example 2. FIG. It is a side view which shows the use condition of a fall prevention tool.

  The fall prevention device has a plate shape, and is hooked to the first hooking hole through the shaft part in contact with the head of the screw or bolt through the notch for introduction and detachably hooked to the second hooking hole. It is possible to prevent them from falling by hanging.

Below, the Example at the time of using a hexagon bolt as an example of a to-be-held member is described.
FIG. 1 shows a use state of a fall prevention device 1 of the present invention. The fall prevention device 1 has a plate body made of a rectangular synthetic resin plate, in this embodiment, a transparent polypropylene plate body 1A. .

[Plate body]
The plate body 1A has a rectangular shape with four corners chamfered with a predetermined radius (5 mm in the illustrated example), and along the center line in the longitudinal direction (on the lower side in the illustrated example), on the head of the bolt 10 A first latching hole 2 capable of latching a shaft portion 12 in contact with 11 is formed, and a second latching hole 7 capable of hooking a hook is provided on the other side (upward in the illustrated example) spaced apart from the first latching hole 2. Is drilled.

FIG. 2 shows a state in which the fall prevention device 1 holding a hexagon bolt having a nominal screw diameter of M16 is turned sideways.
The plate main body 1A is made of a transparent rectangular plate having a length of 65 mm, a width of 30 mm, and a thickness of 1 mm, and is centered at a position 15 mm away from the upper and lower ends in the longitudinal direction along a center line extending in the longitudinal direction. A first hooking hole 2 and a second hooking hole 7 having the above are drilled.

[First retaining hole]
The first hooking hole 2 has a hole body 3 having a diameter of 14 mm and an introduction notch 4 extending from one of the left and right sides in the short direction toward the center of the hole body 3.
Here, since the shaft diameter R is 16 mm, the M16 hexagon bolt is inserted in a state in which the first hooking hole 2 is twisted and deformed against the repulsive force, and the repulsive force of the first hooking hole 2 is used. The hexagon bolt is locked.
Further, since the two-sided width S of the bolt head is 24 mm, it does not fall out of the first retaining hole 2.

[Notch for introduction]
The introduction notch 4 is a notch that connects one side edge of the plate main body 1A and the first retaining hole 2 and is a curved line in this embodiment.
That is, the introduction notch 4 has a curved taper shape that expands from the first latching hole 2 toward the side edge, and therefore, the arcuate raised pieces 4a and 4b that face each other with the introduction notch 4 interposed therebetween. Is formed.

The raised pieces 4a and 4b are arcs having a radius of 5 mm in the illustrated example.
The narrowest width between the raised pieces 4a and 4b is set to 4 mm.
Thus, since the notch 4 for introduction has a tapered shape, the insertion of the shaft portion 12 of the bolt 10 is facilitated.

In order to insert the shaft portion 12 of the hexagonal bolt 10 having a shaft diameter of 16 mm into the first retaining hole 2, one of the pair of raised pieces 4 a, 4 b facing the introduction notch portion 4 is the front side and the other is the back side A finger is applied and twisted in opposite directions against the repulsive force to widen the gap and pass through the shaft portion 12 of the bolt 10, and at the same time, the hole body 3 is also twisted and expanded so that it can be inserted therein. ing.
In this way, the hexagon bolt 10 can be firmly locked in the first retaining hole 2.

[Second retaining hole]
The second retaining hole 7 is a circular hole and has a diameter of 16 mm.
Therefore, the distance from the outer peripheral edge of the second retaining hole 7 to the short side and the left and right long sides of the upper end of the plate body 1A is 7 mm.

[Connecting member]
A hook 20 fixed to the tip of a connecting string 19 shown as an example of a connecting member is hooked in the second hooking hole 7.
The connecting string 19 is made of a suitable material such as thread, rubber, or plastic and has flexibility. For example, the connecting string 19 having a part that can be expanded and contracted (or a coiled string) may be used as a fall prevention tool. The degree of freedom of work 1 is preferred.

[hook]
In the illustrated example, a swivel type eggplant ring is used as the hook 20 fixed to the tip of the connecting string 19. However, this invention is not particularly limited, and various eggplant rings, carabiners, and other removable attachments are possible. A known latching tool can be used.
The hook 20 has a latching portion 21 and an opening / closing member 22 that opens and closes the latching portion 21. When the hook 20 is opened, the hooking portion 21 enters the second latching hole 7 and closes the opening / closing member 22. In this case, it is preferable that the latching portion 21 is endless and has an opening / closing structure connected to the second latching hole 7.

By fixing the base end of the connecting string 19 to a predetermined fixing location (not shown), the plate body of the fall prevention device 1 that holds the hexagon bolt even if the hexagon bolt falls unexpectedly. Since 1A is held by the connecting string, there is no possibility that the hexagon bolt falls.
Alternatively, a fixing tool (not shown) may be provided at the distal end of the connecting string 19 and detachably fixed to the fixing portion.

As shown in FIG. 4, the fall prevention device 1 is used not only when the hexagon bolt is screwed, but also when the hexagon bolt already screwed is removed, as shown in FIG. 4. If there is enough space to insert the plate body 1A between them and twist the introduction cutout 4, the hexagonal bolt can be hooked and fall prevention can be achieved.
The shape and dimensions of the fall prevention device of the present invention are not limited to the above embodiment, and may be any size and shape that can hold the member to be held.

FIG. 3 shows the fall prevention device 1 applied to a hexagonal bolt having a nominal screw diameter of M12.
The plate body 1A is a rectangle having a length of 65 mm, a width of 30 mm, and a thickness of 1 mm, and a first latching hole is located at a position 15 mm away from the upper and lower ends in the longitudinal direction along a center line extending in the longitudinal direction. 2 and a second retaining hole 7 are formed.

The first retaining hole 2 has a hole body 3 having a diameter of 10 mm and an introduction notch 4 extending from one of the left and right sides toward the center of the hole body 3.
Here, since M12 has a shaft diameter of 12 mm, it is inserted in a state in which the first hooking hole 2 is twisted against the repulsive force and is expanded and deformed. Lock.
Moreover, since the two-sided width of the bolt head is 18 mm, it does not fall out of the first retaining hole 2.

The notch 4 for introduction has a curved taper shape that expands from the first latching hole 2 toward the side edge, so that arc-shaped raised pieces 4a and 4b that face each other across the notch 4 for introduction are formed. Has been.
The raised pieces 4a and 4b are arcs having a radius of 5 mm in the illustrated example, and the narrowest width between the raised pieces 4a and 4b is set to 3 mm and is connected to the hole body 3 by a curve.

Thus, since the notch 4 for introduction has a tapered shape, the insertion of the shaft portion 12 of the bolt 10 is facilitated.
In order to insert the shaft portion 12 of the M12 hexagon bolt 10 having a shaft length of 12 mm into the first retaining hole 2, a pair of raised pieces 4 a facing the notch portion 4 for introduction as in the first embodiment, 4b is twisted in the opposite direction against the repulsive force to widen the gap, and the shaft portion 12 of the bolt 10 is passed through. At the same time, the hole body 3 is also twisted and expanded, so it is inserted into the inside.
In this way, the hexagon bolt 10 can be firmly locked in the first retaining hole 2.

The second retaining hole 7 is a circular hole, and the diameter is set to 16 mm as in the first embodiment.
Since the other configuration and usage are the same as those of the first embodiment, the description of the first embodiment and FIGS.

The fall prevention device 1 of the present invention locks a hook 20 fixed to the tip of a connecting string 19 in a second hooking hole 7, and the first hooking hole 2 has a shaft in contact with a screw or bolt head 11. Since the portion 12 is hooked by the repulsive force of the plate body 1A, the screw or bolt does not fall when the screw or bolt is tightened or removed.
Further, depending on the case, it may be tightened with the fall holder attached, and in that case, the hook may be removed from the second retaining hole and latched at the time of use.

In the present invention, an example of a screw or bolt is shown, but it is needless to say that the invention can be applied to screws and bolts of various sizes.
In addition, it goes without saying that various design changes can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Fall prevention tool 1A Plate main body 2 1st latching hole 3 Hole main body 4 Notch part 4a, 4b Opposing piece 5 Guide edge part 7 2nd latching hole 10 Bolt 11 Head 12 Shaft part 19 Connecting string 20 Hook 21 Hanging part 22 Opening and closing member R Shaft diameter S Width across flats

Claims (3)

A plate body made of synthetic resin having flexibility and elasticity;
A first retaining hole that is drilled in the plate body and set to a diameter that is equal to or less than the length of the shaft diameter of the member to be held made of screws or bolts;
A notch for introduction set to a width shorter than the diameter of the first hooking hole that opens by connecting the first hooking hole and the end of the plate body;
It consists of a second retaining hole detachably connected to the other end of the connecting member whose one end is held in place,
A fall prevention device, wherein a pair of pieces forming the notch for introduction is twisted to widen the gap, and the shaft portion of the held member is inserted into or removed from the first retaining hole. The plate body has a substantially rectangular shape, and the first and second retaining holes are spaced apart from each other along a center line extending in the longitudinal direction,
The introduction notch extends from one side edge in the longitudinal direction of the plate body toward the first retaining hole, and the introduction notch extends from the midway position toward the side edge of the plate body. A tapered first guide edge that gradually expands in an arc shape, and a tapered second guide edge that gradually expands in an arc shape from the midway position toward the first retaining hole. The fall prevention tool according to claim 1, wherein   The connecting member has a stretchable part made of a coiled string in whole or in part, and is provided with a hook that can be inserted into the second hooking hole and closed or opened at the tip. The fall prevention tool according to claim 1.

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