JP2948172B2 - Attachment structure for manhole footrest - Google Patents

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 core metal and a synthetic resin covering the core, and the core metal 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, and an object of the present invention is to provide an apparatus having a footrest having a plurality of steps on the upper and lower sides. By unitizing and fixing it to the wall of the manhole using the mounting plate provided in each unit,
It is an object of the present invention to provide a mounting structure for a manhole footrest that can be mounted quickly and easily.

Another object of the present invention is to provide a safe and easy-to-use manhole footrest mounting structure by providing auxiliary handrail members between upper and lower foot steps.

[0006]

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:
It consists of a mounting plate made of synthetic resin and a foot member having a fixed part formed in the center. The back surface of the mounting plate is formed along the manhole wall, and the upper and lower ends of the mounting plate are formed. A joint insertion space portion, a bolt insertion hole is provided in the joint insertion space portion, and a plurality of protrusions for fixing the footstep member are provided between the upper and lower joint insertion space portions. A footrest unit is formed by fixing each footrest member to the mounting plate vertically disposed in the manhole, and the unit is used as an upper joint insertion space of the mounting plate for the lower unit. And the lower joint insertion space of the mounting plate of the upper unit is made continuous, a joint is inserted into the space, and the unit is vertically inserted into the wall of the manhole using the bolt insertion hole. Fix the unit in the manhole Vertically it is obtained so as to plural arrangement.

[0007] Further, an auxiliary handrail member is provided at both ends of the stepping member.

[0008]

1 to 6 relate to an embodiment of the present invention. FIG. 1 is a front view in which a footwear according to the present invention is mounted on a manhole, and FIG. 2 is A in FIG. -A sectional view,
3 is a cross-sectional view taken along line BB of FIG. 1, FIG. 4 is a front view of a foot member,
FIG. 5 is a plan view of FIG. 4, and FIG. 6 is a front view in which a footrest provided with an auxiliary handrail member is attached to a manhole.

In the drawing, reference numeral 1 denotes the entire manhole. The manhole 1 holds two foot members 2 and the center of the foot members 2 respectively. Units 4, 5, and the like of footrests that constitute one unit with the mounting plate 3 to be fixed are vertically arranged. And
Since there is no substantial difference between the units 4, 5 and the like in the present invention, the unit 4 will be described below as a representative.

The mounting plate 3 is made of a synthetic resin, and is arranged vertically in the manhole 1. The rear surface of the mounting plate 3 is formed along the wall of the manhole 1, and joint insertion spaces 6, 6 are formed at the upper and lower ends of the mounting plate 3,
The joint insertion spaces 6, 6 are provided with holes 7, 7 for bolt insertion. Further, fixing protrusions 8, 8 for fixing the stepping member 2 are formed in upper and lower portions between the joint insertion spaces 6, 6, respectively. The projection 8 has a concave portion 1 into which the foot member 2 is inserted for fixing the central portion 9 of the foot member 2.
In the upper and lower portions of the concave portion 10, fixing holes 11, 11 for the stepping member 2 are provided. The mounting plate 3 has a length of about 60 cm, and a length from the upper end to the fixing recess 10 of the upper footrest 2 and from the lower end to the fixing recess 10 of the lower footrest 2 are each approximately. 15cm, fixing recesses 10 for fixing the upper and lower footrests 2 are about 30cm apart
It is.

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. And the corrugated grip 13 is formed on the side surface. In addition, 14 is a reflector provided at both ends of the slip stopper 11.

Then, the center portion 9 of the stepping member 2 is mounted in the recess 10, the titanium bolt 16 is inserted through the stepping member stopper plate 15, and is tightened by the nut 17, so that the mounting plate 3 is The foot members 2 are fixed to form a single foot unit 4.

The unit 4, 5 and the like of the footrest unit unitized as described above are sequentially mounted in the vertical direction with the back surface of each mounting plate 3 along the wall of the manhole 1. For example, first, the mounting plate 3 of the unit 4
The upper half of the joint 18 is inserted into the unit 5 in a state where the joint 18 is inserted into the upper joint insertion space 6 of the unit 5.
By inserting the anchor bolt 19 into the bolt insertion hole 7 formed in the joint insertion space 6 in this state, the unit 4 is inserted into the lower joint insertion space 6 of the mounting plate 3. Attached to the wall of Manhole 1,
Next, the joint 18 is inserted into the upper joint insertion space 6 of the unit 5. By repeating this, the units 4, 5,... Of the footrests are connected and fixed to the wall of the manhole 1, and a large number of footwears are vertically arranged on the wall of the manhole 1.

In this manner, since the two foot portions are formed in one unit, the attachment of the footrest to the wall of the manhole 1 is significantly simplified as compared with the conventional example. Since the mounting is performed only by fixing the mounting plate 3, the mounting to the manhole can be easily and quickly performed. Further, since the units 4 and 5 of the respective footwear are connected, the unit 4 of the footwear is connected. , 5 can be mounted straight and accurately.

As shown in FIG. 6, an auxiliary handrail member 20 can be attached between one end of the upper stepping member 2 and one end of the lower stepping member 2 of the footrest unit 4 by bolts 21 and 21. . The auxiliary handrail member 20 has a corrugated grip portion 22 formed on a side surface thereof.
It can be installed between.

By attaching the auxiliary handrail member 20 between the two stepping members 2 in this manner, when the elevating person lifts and lowers the footrest, the auxiliary handrail member 20, 20... This provides a safe and easy-to-use manhole footrest mounting structure.

[0017]

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. The installation is extremely simple compared to the conventional example, and the installation is performed only by fixing the plate, and the unit members of each footrest are connected. This is the most suitable mounting structure for manhole footrests to replace the footrests installed inside the manhole.

Further, by providing auxiliary handrail members at both ends of the stepping member, a more convenient and safe mounting structure for the manhole footrest can be obtained.

[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 sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along the line BB of FIG. 1;

FIG. 4 is a front view of a stepping member.

FIG. 5 is a plan view of FIG. 4;

FIG. 6 shows a footrest provided with an auxiliary handrail member;
FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 manhole 2 foot member 3 mounting plate 4, 5 foothold unit 6 joint insertion space 7 bolt insertion hole 8 protrusion 18 joint 20 auxiliary handrail member

Claims (2)

(57) [Claims] 1. A mounting plate made of a synthetic resin and a foot member having a fixed portion formed in the center, the back surface of the mounting plate being formed along a manhole wall, and Spaces for joint insertion are formed at both upper and lower ends of the plate body, holes for bolt insertion are provided in the space for joint insertion, and a plurality of holes for fixing the stepping member are provided between the upper and lower space for joint insertion. Are provided, and each footrest member is fixed to the mounting plate vertically arranged in the manhole to constitute a unit for a footrest, and the unit is used to form an upper portion of the mounting plate for the lower unit. The joint insertion space portion and the lower joint insertion space portion of the mounting plate of the upper unit are made continuous to insert a joint into the space portion, and the unit is provided with the bolt insertion hole in the wall of the manhole. And fix it vertically. A mounting structure for manhole footrests, which are arranged vertically in the manhole. 2. The mounting structure according to claim 1, wherein auxiliary handrail members are provided at both ends of said stepping member.