JPH10280452A - Mounting structure for manhole footrest - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manhole footrest mounting structure enabling an easy mounting work and an easy use as well as ensuring safety by unitizing a structure having an oblong hole used in common to a handrail and a safety rope, between an upper footrest member and a lower footrest member and then firmly fixing the unit to a manhole wall. SOLUTION: One side 7 of a plate material is formed to suit the wall of a manhole 1 and a bolt hole 8 is formed on the side of the plate material. Also, a fixing hole 10 for a footrest member 2 is provided on the upper and lower parts of the other side of the plate material, and an oblong hole used in common to a handrail and a safety rope is formed between the upper and lower parts. In addition, the footrest member 2 is extended into the fixing hole 10 thereof between the plate materials laid within a manhole 1 in parallel along a vertical direction, thereby forming a footrest unit. Then, the unit is fixed to the wall of the manhole 1 along one side of the plate material, and a plurality of the units are arranged in a fixed state along a vertical direction within the manhole 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for a footrest installed in a manhole, and more particularly to a method for replacing a footrest installed in an existing manhole. The present invention relates to an optimal mounting structure for a footrest.

[0002]

2. Description of the Related Art Conventionally, a foot portion and side portions located on both sides of the foot portion are conventionally formed, and the foot portion and the side portion are formed of a metal core and a synthetic resin covering the metal core, and the metal core is further extended. A footrest for a manhole in which a leg is formed by burying the leg in a manhole wall is well known, for example, as disclosed in Japanese Utility Model Publication No. 4-4040.

[0003]

By the way, in the above-mentioned conventional example, since the two legs of each footrest are buried in the manhole wall, the operation is troublesome. In particular, there is a problem that when replacing a footrest in an existing manhole, it is not very easy to attach a new footrest to the manhole in a narrow place.

The present invention has been made in view of the above-mentioned problems of the prior art. It is an object of the present invention to provide a handrail and a safety-loop long hole between upper and lower foot members. The object of the present invention is to provide a manhole footrest mounting structure that is easy to use, easy to use, and secure by unitizing the product and fixing it to the wall of the manhole.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, a mounting structure for a foothold for a manhole according to the present invention comprises:
A synthetic resin-made plate having a substantially L-shaped cross section and a foot member having fixing portions formed at both ends are provided.
Holes along the side walls of the plate body, holes for bolt insertion are provided on the other side of the plate, holes for fixing the stepping members are provided on the upper and lower sides of the other side of the plate, and a handrail and safety rod is provided between the holes on the upper and lower parts. A long hole is formed for the stepping member, and the stepping member is inserted into the fixing hole of each stepping member between the plate members arranged vertically in the manhole, and the stepping member is inserted into both plate members. Fixed to form a footrest unit, the unit is fixed to the wall of the manhole on one side of the plate, and a plurality of the units are fixed vertically in the manhole. It is.

Further, the fixing portion for fixing the foot member to the plate and the fixing portion for fixing the plate to the wall of the manhole are covered with a protection cap.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 3 relate to an embodiment of the present invention. FIG. 1 is a schematic side view of a foothold according to the present invention mounted on a manhole, and FIG. 2 is a front view thereof. , FIG.
FIG. 3 is a sectional view taken along line AA of FIG. 2.

In the drawing, reference numeral 1 denotes an entire manhole. In the manhole 1, two foot members 2 and both ends of the foot members 2, 2 are held. Unit members 4, 5, 6, etc., of footrests, which constitute one unit with the plate bodies 3, 3 to be fixed, are vertically arranged. Since the units 4, 5, 6, etc. have no substantial difference in the configuration of the present invention, the unit 4 will be described below as a representative.

The plate 3 has a substantially L-shaped cross section and is made of synthetic resin. The two plates 3 are arranged in the manhole 1 in parallel in the vertical direction. I have. And
One side surface 7 of the plate 3 is formed along the wall of the manhole 1, and holes 8 for inserting bolts are provided in the upper and lower portions of the side surface 7. Further, holes 10 and 10 for fixing the stepping member 2 are provided in the upper and lower portions of the other side surface 9 of the plate body 3, and between the holes 10 and 10 in the upper and lower portions are a handrail and a safety rope. A long hole 11 is formed. In addition,
The plate 3 has a length of about 60 cm, from the upper end to the fixing hole 10 of the upper foot member 2 and from the lower end to the fixing hole 10 of the lower foot member 2, respectively, about 15 cm,
The interval between the fixing holes 10, 10 of the upper and lower foot members 2 is about 30.
cm.

The stepping member 2 is composed of a linear core material coated with a synthetic resin so as to have a loft angle from the central portion S to each end portion.
2, two corrugated grips 13 are formed on the side surfaces, and screws are screwed at both ends to form fixing portions 14 to the plate 3. Reference numeral 15 denotes reflectors provided at both ends of the slip stopper 12.

Then, the fixing portions 14 of the foot members 2 are inserted into the fixing holes 10 of the plate 3 and tightened by the nuts 16 so that the foot members 2 are fixed between the plates 3. Thus, the unit 4 of one footrest tool is configured.

The unit 4, 5, 6, etc. of the footrest unit unitized as described above has one side 7 of the plate 3 along the wall of the manhole 1, and one side of the plate 3 By fixing the bolt insertion holes 8, 8 formed in 7 to the wall of the manhole 1 with anchor bolts 17, a large number of footrests are vertically arranged on the wall of the manhole 1. Become

[0013] In this way, since the two foot portions are formed in one unit, the attachment of the footrest to the wall of the manhole 1 is greatly simplified as compared with the conventional example. Since the mounting is performed only by fixing the plate 3, workability is good, and further, a long hole 11 for a handrail and a safety loop is formed between the foot members 2 on the side surface 9 of the plate 3. Therefore, the plate 3 can be used as a handrail, and can also be used as a hole for mounting a safety rope, so that it is easy to use, and a safe mounting structure for a foothold for a manhole can be obtained.

A fixing portion 14 for fixing the foot member 2 to the plate 3 and a fixing portion 17 for fixing the plate 3 to the wall of the manhole 1 are provided with protection caps 18 and 1, respectively.
When the cover is covered with 9, the whole footrest is protected from corrosion, and a more useful manhole footrest mounting structure is provided.

[0015]

According to the mounting structure for a footrest for a manhole according to the present invention, since two foot portions are formed in one unit, the footrest can be attached to the wall of the manhole. Installation is extremely simple compared to the conventional example, and since the installation is performed only by fixing the plate, workability is good, and furthermore, a handrail and safety rod is provided between the foot members on the side of the plate. Because the long hole for the lamp is formed, the plate can be used as a handrail, and it can also be used as a hole for attaching a safety loop, and it is easy to use and safe, especially installed in the existing manhole. It is the most suitable structure for mounting manhole footwear to replace the existing footwear.

When the fixing portion for fixing the foot member to the plate and the fixing portion for fixing the plate to the wall of the manhole are respectively covered with protection caps, the entire footrest is protected from corrosion. As a result, a more useful manhole footrest mounting structure is provided, which is particularly useful for replacing a footrest installed in an existing manhole.

[Brief description of the drawings]

FIG. 1 is a perspective view of a footrest according to an embodiment of the present invention;
FIG.

FIG. 2 is a front view of the same.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Manhole 2 Foot member 3 Plate body 4,5,6 Foot unit 7 Side of plate body 8 Hole for bolt insertion 9 Other side of plate body 10 Fixing hole 11 Handrail and safety rope Slot 18, 19 Protection cap

Claims (2)

[Claims] 1. A plate made of a synthetic resin and having a substantially L-shaped cross section and a stepping member having fixed portions formed at both ends, wherein one side of the plate is formed along the manhole wall. A hole for bolt insertion is provided on the side surface, a hole for fixing the foot member is provided on the upper and lower portions of the other side surface of the plate body, and a long hole for a handrail and a safety rope is formed between the upper and lower holes. A footrest member is fixed to both the plate members by inserting the footstep member into the fixing hole of each foot member between the plate members arranged in parallel in the vertical direction in the A mounting structure for a foothold for a manhole, wherein the unit is fixed to a wall of the manhole on one side surface of the plate body, and a plurality of the units are vertically fixed in the manhole. . 2. A manhole according to claim 1, wherein a fixing portion for fixing the foot member to the plate and a fixing portion for fixing the plate to the wall of the manhole are covered with a protection cap. -Mounting structure for footrests.