JP2754477B2 - 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, and an object of the present invention is to provide a footrest as a unit having a plurality of footboards,
By using the footrest base and fixing the base to the manhole wall with bolts and adhesive, and by reusing sludge, installation work is easy, strong, rust and corrosion. It is an object of the present invention to provide a mounting structure for a manhole footrest that is highly resistant to manholes.

[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 foothold component mainly comprising a plurality of footboards and handrail members extending vertically at both end portions thereof and fixed portions at both ends of the handrail members,
A manhole footrest comprising a box-shaped synthetic resin base extending in the vertical direction and having an opening along the wall surface of the manhole and having a hole for inserting the fixing portion; Attaching a plurality of footboards to the handrail member, fixing the fixing portion of the handrail member in the base, storing the fired granular sludge in the base, and integrating the base and the sludge with an adhesive. Into a unit, and the unit is
The leg provided on the base is fixed to the manhole wall with a bolt, and the leg and the sludge are fixed to the manhole wall with an adhesive.

[0006] Further, the handrail member is of a split type, and a plurality of foot plates are attached in the middle of the split type.

Further, the foot plate is formed in a wide honeycomb structure.

[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.
FIG. 4 is an exploded view of the footrest according to the present invention, FIG. 4 is a side view of a unit mounted on the upper part of the manhole, and FIG.
FIG. 6 is a side view of a unit attached to a lower part of the unit.

In the drawing, reference numeral 1 denotes an entire manhole. The manhole 1 includes a footrest unit 2,
Are arranged in the manhole 1 in the vertical direction.

The foot-holding unit 2 comprises a foot-holding tool main body 6 comprising two foot treads 3, 3 and a handrail member 4 extending vertically at both ends thereof and fixing portions 5 at both ends of the handrail member 4.
And a box-shaped synthetic resin base 9 elongated in the vertical direction and having an opening 8 extending along the wall surface of the manhole 1 and having a hole 7 into which the fixing portion 5 is inserted. .

The footrest body 6 has its fixing portions 5 and 5 inserted into holes 7 and 7 formed in upper and lower positions of the base 9, and is fixed in the base 9 by nuts 10. It is done. In the base 9, fired granular (about 1 to 2 mm diameter) sludge 11 (sand and sludge) is stored.
After the sludge 1 is fixed to the base 9, a strong adhesive such as an epoxy-based or polyester-based adhesive is applied to the base 9.
1, the base 9 and the sludge 11 are integrated by the adhesive while protecting the fixing portion 5. Reference numeral 12 denotes a leg formed integrally with the base 9.

Since the footrest for a manhole is constructed as described above, the footrest unit 2 in which the footrest main body 6 is fixed to the base 9 and the sludge 11 is stored in the base 9 is provided. ,
The adhesive is further applied to the surface of the leg 12 and the sludge 11 which comes into contact with the wall of the manhole 1, and the anchor bolt embedded in the wall of the manhole 1 is inserted into the bolt hole 1 of the leg 12.
It is attached to the manhole by tightening the nut through 3. At this time, the sludge 1
Since the slug 11 is sealed, the sludge 11 protects the fixing portion 5 of the handrail member 4 of the leg holder 6 without touching moisture or the like in the manhole 1.

In this manner, the footwear unit 2 is composed of the footwear main body 6 and the base 9, and the footwear unit 2 having the plurality of footboards 3, 3 is mounted on the wall of the manhole 1. Mounting is performed by bolting the legs 12 of the base 9 and the legs 12 and the sludge 1.
As it is performed by fixing with 1 adhesive, workability is good,
Since the fired granular sludge 11 is stored in the base 9, the sludge 11 can be reused and the sludge 11 can be reused.
This makes it possible to reinforce the footwear unit 2, and furthermore, the sludge 11 can prevent rust and corrosion of the fixing portion 5 of the handrail member 4 of the footwear main body 6.

As shown in detail in FIG. 3, the handrail member 4 is fixed to a fixing portion 5 inserted into a hole 7 formed at an upper position of the base 9 and a penetrating portion 15 penetrating the upper foot plate 3. , A tube 42 between both foot plates 3, 3,
An elbow 43 having a fixing portion 5 inserted into a hole 7 formed at a lower position of the base plate and a penetrating portion 16 penetrating the lower foot plate 3.
When the end portions of the penetrating portions 15 and 16 are inserted into the pipe 42 and assembled, the handrail member 4 and the foot plate 3
Can be assembled very easily.

[0015] Further, as shown in FIG.
By making the width wider than that of the conventional foot step portion, the stability of the foot when ascending and descending is increased, and the configuration of the plate is changed to the honeycomb structure 17.
By doing so, the lightweight and strong footboard 3 can be obtained.

[0016]

According to the mounting structure for a foothold for a manhole according to the present invention, the footwear unit provided with a plurality of footboards is composed of a footrest main body and a base. The mounting of the footrest to the wall of the manhole is carried out by bolting the legs of the base and fixing the legs and sludge with adhesive, as compared with the conventional case. The bolts are small in diameter and workability is good, and fired granular sludge is stored in the base, so that sludge can be reused and the foothold unit is made of sludge. Can be reinforced, and furthermore, the rust and corrosion of the fixed part of the handrail member mainly composed of footholding equipment can be prevented by sludge, and the installation work is easy, strong, strong against rust and corrosion, especially the existing Replace the footrest installed in the manhole The mounting structure of the Le for footrests instrument - optimum sailing on.

In the case where the handrail member is of a split type and a plurality of footboards are mounted in the middle of the split type, assembly of the handrail member mainly composed of a footrest and the footboard can be extremely easily performed. Mounting structure for manhole footrest.

Further, when the footboard is formed in a wide honeycomb structure, the stability of the foot when ascending and descending is increased, and the mounting structure of the foothold for a manhole having a lightweight and strong footboard is provided. Become.

[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 an exploded view of the footwear according to the present invention.

FIG. 4 is a side view of a unit mounted on the upper part of the manhole.

FIG. 5 is a side view of a unit attached to a lower portion of the manhole.

FIG. 6 is a plan view of a foot plate in the footwear according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Manhole 2 Footrest unit 3 Footstep board 4 Handrail member 5 Fixed part 6 Footrest main body 7 Hole for inserting fixed part 8 Opening 9 Base 11 Sludge 12 Leg 17 Honeycomb structure 41, 42, 43 Split member

Claims (3)

(57) [Claims] 1. A footrest comprising a plurality of footboards, a handrail member extending vertically at both ends thereof, and fixing portions at both ends of the handrail member, and a manhole having a hole for inserting the fixing portion.
And a box-shaped synthetic resin base elongated in the vertical direction and having an opening along the wall of the manhole, and a plurality of footboards attached to the handrail member. A fixed unit of the handrail member is fixed in the base, and the baked granular sludge is stored in the base, and the base and the sludge are integrated with an adhesive to constitute a unit,
In this unit, the leg provided on the base is fixed to the manhole wall with a bolt, and the leg and the sludge are also fixed to the manhole wall with an adhesive. Mounting structure for hooks. 2. The mounting structure according to claim 1, wherein the handrail member is of a split type, and a plurality of footboards are mounted in the middle of the split type. 3. The mounting structure according to claim 1, wherein the foot plate is formed in a wide honeycomb structure.