JP2819109B2 - Footrest mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a foot portion, a side portion located on both sides thereof and a leg portion, and the foot portion and the side portion are formed of a cored bar and a synthetic resin covering the core bar. The present invention relates to a device for mounting a footrest for a manhole or the like.

[0002]

2. Description of the Related Art Conventionally, a manhole or the like which has a foot portion, a side portion located on both sides thereof, and a leg portion, wherein the foot portion and the side portion are formed of a core bar and a synthetic resin covering the core bar. For example, as shown in Japanese Utility Model Publication No. 4-4040, a hook-shaped leg is extended from both sides, and this hook-shaped leg is attached to a wall such as a manhole. There is an apparatus in which a footrest is fixed by inserting it into a formed hole for fixing the footrest and fixing it with an adhesive.

Further, as shown in FIG. 5, a leg extending linearly from both sides is inserted into a hole for fixing a footrest formed in a wall of a manhole or the like to fix the footrest. Some have been made. That is, a split 23 is formed at the tip of each of the legs 22, 22 extending linearly from both sides 21, 21 of the footrest 20 in the axial direction. Is arranged. Then, while the piece 24 is slightly inserted into the tip opening of the leg 22, the foot of the footholding tool 20 is inserted into a hole formed in a wall of, for example, a manhole having a diameter substantially equal to the outer diameter of the leg 22. The leg 22 is inserted while hitting the tread 25 with a hammer. At this time, when the piece 24 comes into contact with the inner wall of the hole, the piece 24 thereafter sequentially enters the leg 22 and the tip portion is sequentially enlarged in the split portion 23 of the leg 22. The leg 22 abuts around the hole, and the leg 22 of the footrest 20 is fixed to the wall of the manhole.

[0004]

By the way, in the case where the legs are hook-shaped, a manhole for inserting the legs is used.
The diameter of the hole formed in the wall of the tool or the like becomes large, and the work of digging the hole is not easy, requiring an excessive amount of labor and a large amount of adhesive.

[0005] Also, in the case of using the linearly extending legs, the holes formed in the wall of a manhole or the like are accurately formed with a hole formed in a wall such as a manhole because the piece is moved by using the inner wall of the hole. Must be installed, the work is troublesome,
Since the hammer strikes the foot step or the like when attaching the footrest, the footrest may be deformed.

SUMMARY OF THE INVENTION The present invention has been made in view of such problems of the prior art, and an object of the present invention is to provide a foot for a hole formed in a concrete wall such as a manhole. The legs of the hook are securely held, the holes are relatively easy to drill, the foot is securely attached to the wall such as a manhole, and the foot can withstand long-term use. It is an object of the present invention to provide a safe attachment device for a footrest for a manhole or the like.

[0007]

In order to achieve the above-mentioned object, the present invention provides an apparatus for mounting a foot-holding tool for a manhole or the like, wherein a metal core is extended from both sides and a plurality of retaining bars are provided on the outer periphery thereof. A leg made of a synthetic resin, formed with a plurality of retaining protrusions on the outer periphery and formed with a plurality of splits in the axial direction on the distal end side and fixed in a concrete wall hole with an adhesive. A socket, wherein the socket is fixed in a concrete wall hole, and a leg portion of the footrest is inserted into the socket and the footrest is fixed in the concrete wall hole. Is what you do.

[0008]

1 to 4 relate to an embodiment of the present invention. FIG. 1 is a plan view of a footrest, FIG. 2 is a front view thereof, and FIG. 3 is a foot inserted into a socket. FIG. 4 is a side view of the hook, and FIG. 4 is a sectional view of a main part in which the foot hook is fixed in the concrete wall hole.

In the drawings, reference numeral 1 denotes the entire footwear. The footwear 1 is composed of a foot portion 2 and side portions 3 and 3 located on both sides thereof. The side portions 3 are formed by coating a synthetic resin 5 such as polypropylene on a core 4 made of iron having a substantially U-shape in plan view.

The metal core 4 extends from both sides 3 and 3 to form the legs 6 and 6 of the footrest 1. The core metal 4 constituting the leg portion 6 has a plurality of retaining projections such as a ring-shaped projection 7 on the outer periphery near the side portion 3 and a projection 8 due to a step near the tip. doing.

The upper and lower surfaces of the foot portion 2 are formed to be inclined at an angle of 1 to 5 degrees from the center S in the axial direction to both sides, and the upper and lower surfaces of the foot portion 2 are raised and lowered. A number of anti-slip patterns 9 are formed in the axial direction to prevent the foot of the person from slipping. It is formed in the direction. A reflector 13 in which reflector elements 11 and 12 are attached and coupled from above and below is attached to a corner between the foot portion 2 and the side portion 3.

Reference numeral 14 denotes a socket made of a synthetic resin. A plurality of saw-tooth-shaped protrusions 15 for retaining are formed on the outer periphery of the socket 14, and a plurality of splits 16 are formed on the distal end side in the axial direction. Are formed. On the inner periphery of the socket 14, there are formed steps 17, 18 and the like for locking the ring-shaped protrusion 7 formed on the leg 6 and the protrusion 8 due to a step. Reference numeral 19 'denotes a concrete wall forming a manhole wall, seawall, and the like.

In the mounting device for the footrest 1 having the above-described structure, when the footrest 1 is fixedly mounted on the concrete wall 19 ', the holes 19 are provided at predetermined intervals in the concrete wall 19'. Drilling. The diameter of this hole 19 is
Can be easily inserted.

Then, the socket 14 is inserted into the hole 19, and the outer periphery of the socket 14 is filled with an adhesive. Next, the leg 6 of the footrest 1 is inserted into the socket 14. As a result of this insertion, the diameter of the socket 14 is enlarged at the split 16, and the outer periphery of the distal end of the socket 14 is in close contact with the hole 19 via an adhesive, and the outer peripheral portions of the socket 14 press the adhesive, and the socket 14 is The concrete wall hole 19 is securely fixed.

Also, the footrest 1 inserted into the socket 14
The leg 6 has its projections 7, 8, etc. locked to the steps 17, 18, etc. of the socket 14, and the socket 14 of the footrest 1.
As a result, the footrest 1 is securely fixed to the concrete wall.

[0016]

According to the present invention, a leg having a core extending from both sides and a plurality of retaining projections formed on the outer periphery thereof, and a plurality of retaining projections formed on the outer periphery thereof, and having A synthetic resin socket which has a plurality of splits on its side in the axial direction and is fixed in the concrete wall hole with an adhesive. The socket is fixed in the concrete wall hole, and is inserted into the socket. Since the leg of the footrest is inserted into the hole in the concrete wall, the footrest is securely fixed to the concrete wall via the socket and is made of synthetic resin. With this socket, the footrest mounting device can reliably prevent corrosion of the leg of the footrest by concrete.

[Brief description of the drawings]

FIG. 1 is a plan view of a footrest according to one embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a side view of the footrest inserted into the socket.

FIG. 4 is a cross-sectional view of a main part in which a footrest is fixed in a concrete wall hole.

FIG. 5 is a plan view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Foot-holding tool 2 Foot step 3 Side part 4 Metal core 5 Synthetic resin 6 Leg part 7, 8 Retaining projection 14 Socket 15 Retaining projection 16 Split 19 Concrete wall hole

Claims (1)

(57) [Claims] 1. A footrest having a foot portion, a side portion located on both sides thereof, and a leg portion, wherein the foot portion and the side portion are formed of a cored bar and a synthetic resin covering the core bar. A leg having a plurality of retaining protrusions formed on the outer periphery of a metal core extending from the portion, and a plurality of retaining protrusions formed on the outer periphery and having a plurality of splits in the axial direction on the distal end side. A socket made of synthetic resin which is fixed in the wall of the concrete wall with an adhesive material, the socket is fixed in the hole of the concrete wall, and the leg of the footrest is inserted into the socket for concrete. -An attachment device for a footrest, wherein the footrest is fixed in the wall hole.