JP2754475B2 - 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 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.

SUMMARY OF THE INVENTION 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 unitize a plurality of foot members and use a bolt and an adhesive to make a manhole. An object of the present invention is to provide a manhole footrest mounting structure that is easy to install, strong, and resistant to rust and corrosion by being fixed to a wall and by reusing sludge.

[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:
It consists of a bottomed box made of synthetic resin and a foot member having fixed parts formed at both ends, and a plurality of foot members are inserted between the boxes arranged vertically in the manhole in the delivery box. The stepping member is fixed, the fired granular sludge is accommodated in the box, and the box and the sludge are integrated with an adhesive to constitute a unit of a footrest device, and a leg formed in the box of the unit is bolted. And the legs and the sludge are also fixed to the manhole wall with an adhesive.

[0006] Further, a plurality of the units are vertically and independently provided in the manhole.

Further, a reflector is provided near both ends of the foot member near the outside of the box.

[0008]

1 to 5 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.
2 is a sectional view taken along line AA of FIG. 2, FIG. 4 is a sectional view taken along line BB of FIG. 3, and FIG. 5 is a front view of a hook applied at the time of construction.

In the drawing, reference numeral 1 denotes an entire manhole. The manhole 1 includes units 2, 3, 4, and 5 of footrests in the manhole 1 in a vertical direction. It is designed to be connected independently. Each unit 2,
Each of 3, 4, and 5 has two or three foot members 6, but since there is no particular difference in the substantial configuration of the invention,
The following describes the unit 4 as a representative.

The bottomed box 7 is made of a synthetic resin, and the two boxes 7, 7 are arranged in the manhole in parallel in the vertical direction. The stepping member 6 has a straight core material coated with a synthetic resin, a non-slip 8 is formed on the upper surface, a corrugated grip 9 is formed on the side surface, and a fixing portion 10 is formed on both ends. Are formed.

Two foot members 6 are arranged in parallel between the boxes 7, 7 at an interval of about 30 cm, and fixed portions 10 at both ends of each foot member 6 are provided with nuts 1 in the box 7.
Fixed by 1. As shown in FIG. 3, the box 7 has a leg 1 at the free end side of the surface to which the foot member 6 is fixed.
2 and the leg 12 is configured to abut against the wall of the manhole 1. Further, as shown in FIG. 4, the box 7 forms a box with upper and lower surfaces. Reference numeral 13 denotes burned granular sludge 13 (sand and sludge) having a diameter of about 1 to 2 mm stored in each box 7.

In the units 2, 3, 4, and 5 of the footrest for manhole having the above structure,
The box 7 and the sludge 13 are integrated into a unit by filling the baked sludge 13 with a strong adhesive such as an epoxy-based or polyester-based adhesive. These units 2, 3,
Reference numerals 4 and 5 further apply the adhesive to the surfaces of the legs 12 and the sludge 13 which come into contact with the wall of the manhole 1 and
The anchor bolts 14 embedded in the wall of the pedestal are passed through the bolt holes of the legs 12 and the nuts 15 are tightened.
Attached to the At this time, since the sludge 13 is sealed in the box 7, the fixing portion 10 of the foot member 6 is protected by the sludge 13 from touching moisture or the like in the manhole. The order of mounting the units is as follows: from the upper unit 2 to the unit 3, unit 4,
When the upper unit is securely attached to the manhole 1, the hook 16 provided at the upper part of the box 7 of the lower unit is attached to the lower part of the box 7 of the upper unit. By locking the locking portions 17 provided on the manhole 1, the work of attaching the lower unit to the manhole 1 becomes easier.

In this manner, since a plurality of foot portions are formed in one unit, the mounting of the footrest on the manhole wall is significantly simplified as compared with the conventional example, and furthermore, the mounting of the footrest is simplified. Is performed by bolting the legs of the box and fixing the legs and sludge with adhesive, so workability is good, and the box contains fired granular sludge, so sludge can be reused. In addition, the footrest can be reinforced by the sludge, and furthermore, the rust and the corrosion of the fixing portion of the foot step can be prevented by the sludge.

As shown in FIGS. 1 and 2, each of the units 2, 3, 4, and 5 is independent, and a plurality of these units are appropriately arranged vertically depending on the scale of the manhole 1. You can do it.

As shown in FIGS. 3 and 4, reflectors 18 and 18 are provided near both sides of the box 7 at both ends of the foot member 6.
Is provided, the outline of the footstep can be clearly determined.

[0016]

According to the mounting structure for a footrest for a manhole according to the present invention, since a plurality of foot steps are formed in one unit, the footrest is mounted on the wall of the manhole. Is much simpler than the conventional example, and the mounting is done by bolting the legs of the box and fixing the legs and sludge with adhesive, so the bolts need to be small in diameter and workability is good. Since the fired granular sludge is stored in the box, the sludge can be reused and the footwear can be reinforced by the sludge. It is easy to install, strong, resistant to rust and corrosion,
In particular, the mounting structure of the footrest for manhole that is optimal for replacing the footwear installed in the existing manhole.

In the case where a plurality of units are independently and vertically arranged in the manhole, the manhole footholding attachment structure can be easily adapted to the scale of the manhole.

Further, when reflectors are provided near the outside of the box at both ends of the stepping member, the contour of each stepping portion can be clearly determined, so that the manhole can be easily moved up and down. Mounting structure for manhole footrest.

[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;

FIG. 4 is a sectional view taken along line BB of FIG. 3;

FIG. 5 is a front view of a hook applied during construction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Manhole 2,3,4,5 Foot unit 6 Foot member 7 Box 10 Fixing part 12 Leg part 13 Sludge 14 Bolt 18 Reflector

Claims (3)

(57) [Claims] 1. A bottomed box made of a synthetic resin and a stepping member having fixed portions formed at both ends, and a plurality of stepping members are provided between the boxes arranged vertically in a manhole. The stepping member is fixed in the delivery box, the fired granular sludge is stored in the box, and the box and the sludge are integrated with an adhesive to form a unit for a footrest, and formed in the box of the unit. Mounting structure for a manhole footrest, wherein the leg portion is fixed to the manhole wall with bolts, and the leg portion and the sludge are also fixed to the manhole wall with an adhesive. 2. The mounting structure according to claim 1, wherein a plurality of said units are independently and vertically connected in the manhole. 3. The mounting structure according to claim 1, wherein reflectors are provided near the outside of the box at both ends of the stepping member.