JP2004162273A - Mounting device for footstep implement for manhole and the like - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mounting device for a footstep implement for a manhole and the like, which makes the footstep implement surely mounted on a wall of the manhole and the like, not only by surely/easily fitting a leg part of the footstep implement to a cap to be embedded in the wall of the manhole and the like but also by increasing mounting strength. <P>SOLUTION: In this mounting device for the footstep implement for the manhole and the like, a protrusive streak 15 for preventing the cap 14 from slipping off is formed on the outer periphery of the cap 14; a plurality of locking grooves 16 are formed on the inner periphery of the cap 14; an expanded cylindrical part 17 is formed in the opening part of the cap 14; many belt-like groups 11 of protrusions, which are arranged in the leg part 4 in the axial direction of the leg part 4, are radially split into a plurality of pieces; air vent passages 12 are formed among the respective split groups 11; some of the respective groups 11 are locked to the locking groove 16 of the cap 14; and a flange 13, which is formed on the side of the side part of the leg part 4, is superposed into the cylindrical part 17 of the cap 14. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
According to the present invention, a plurality of locking portions are formed on the leg portion of a footrest having a foot portion, side portions located on both sides thereof, and a leg portion attached to a manhole or the like. The present invention relates to a device for attaching a foot-holding tool for a manhole or the like, which is engaged with an inner peripheral surface of a cap buried in a concrete wall.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a plurality of locking portions are formed on a leg portion of a footrest having a foot portion, side portions located on both sides thereof, and a leg portion attached to a manhole or the like, and the locking portion is made of concrete. In a mounting device for a foothold device for a manhole or the like which is to be locked to an inner peripheral surface of a cap buried in a wall, a synthetic resin covering a metal core of a leg portion is formed in a substantially circular cross section, and a side portion is formed. A plurality of fins are formed integrally with the covering synthetic resin, and a plurality of fins are provided on the outer peripheral surface of the substantially circular synthetic resin in the axial direction from the leg side to the side, and are mounted on a concrete wall. Are generally hollow cylinders, and a plurality of steps are provided on the inner wall of the hollow cylinder to lock the fins (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
JP 2000-144776 A
[Problems to be solved by the invention]
By the way, in the device for mounting a footrest for a manhole or the like, since the plurality of fins of the leg and the groove of the mounting member are locked, the mounting strength of the footrest to the mounting member is weak, and furthermore, Since there is no air vent passage, there is a possibility that the legs may be difficult to insert into the mounting member. Further, the footrest cannot be mounted in a good appearance due to the shape of the wall surface of the manhole or the like, and the footrest may become unstable due to long-term use of the footrest.
[0005]
The present invention has been made in view of the above-mentioned problems of the related art, and an object of the present invention is to attach a leg of a footrest to a cap buried in a wall such as a manhole. An object of the present invention is to provide a device for attaching a foothold device for a manhole or the like in which the fitting can be securely and easily performed and the mounting strength is increased so that the footrest device can be securely mounted on a wall such as a manhole.
[0006]
In addition, an attempt is made to provide a mounting device for a manhole or the like that can be mounted with a good appearance in accordance with the shape of the wall surface of the manhole or the like and can withstand long-term use of the footwear. To do.
[0007]
[Means for Solving the Problems]
Means for Solving the Problems To achieve the above object, a footrest mounting device for a manhole or the like according to the present invention comprises a footrest having a foot portion, side portions located on both sides thereof, and a leg portion attached to the manhole or the like. A plurality of locking portions formed on the leg portion of the tool, and the locking portion is locked on the inner peripheral surface of the cap embedded in the concrete wall. A plurality of locking grooves are formed on the inner periphery, a plurality of locking grooves are formed on the inner periphery, an enlarged cylindrical portion is formed at the opening of the cap, and a plurality of strips are arranged on the legs in the axial direction. The projection group is radially divided into a plurality of groups, an air vent passage is formed between each of the divided band-shaped projection groups, and a part of each of the band-shaped projection groups is locked in the locking groove of the cap. A flange is formed on the side of the cap, and the flange is formed into an enlarged cylinder of the cap. It is characterized in that so as to polymerize within.
[0008]
Further, the flange and one end surface of the enlarged cylindrical portion are formed with an inclined surface corresponding to the shape of the concrete wall surface.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
1 to 4 relate to an embodiment of the present invention. FIG. 1 is an explanatory plan view of attaching a footrest to a concrete wall, FIG. 2 is a front view of the footrest, and FIG. 3 is a side view of the footrest. FIG. 4 is a front view of the cap.
[0010]
In the drawing, reference numeral 1 denotes the entire footrest, and the footrest 1 has a foot portion 2 and side portions 3 and 3 located on both sides thereof, and leg portions 4 attached to a manhole or the like. The foot step 2, the side part 3, and the leg part 4 are each formed by coating a synthetic resin 6 such as polypropylene on a metal core 5 having a substantially U-shape in plan view with a synthetic resin 6 such as polypropylene. is there.
[0011]
A substantially non-slip pattern 7 is formed on almost the entire surface of the foot portion 2 and the side portions 3, 3, and reflectors 8, 8 are provided at both corners of the foot portion 2. Reference numerals 9 denote wavy grip portions formed on one side surface of the foot portion 2. On the front surface of the foot portion 2, impact receiving portions 10, 10 for driving the footrest 1 are integrally formed with the covering of the synthetic resin 6 of the foot portion 2. Further, the thickness of the foot portion 2 is changed so as to be inclined upward at an angle of 1 to 5 degrees from the center portion S of the upper surface toward both ends.
[0012]
The synthetic resin 6 covering the metal core 5 of the leg portion 4 is formed to have a substantially circular cross section, and a plurality of band-shaped protrusions arranged on the outer peripheral surface of the substantially circular synthetic resin 6 on the leg side in the axial direction. The groups 11, 11,... Are divided into a plurality in the radial direction and are integrally formed with the synthetic resin 6. Air vent passages 12, 12,... Are formed between each of the divided strip-shaped projection groups.
[0013]
A flange 13 is integrally formed of a synthetic resin 6 at a boundary between the side portion 3 and the leg portion 4.
[0014]
Reference numeral 14 denotes a cap for fixing the leg portion 4, which has a substantially hollow cylindrical shape. On the outer periphery of the cap 14, projections 15, 15,... Are substantially equal to the outer diameter of the synthetic resin 6 of the leg portion 4, and a plurality of locking grooves 16, 16,... For locking the band-shaped projection groups 11, 11,. . An enlarged cylindrical portion 17 for overlapping the flange 13 is formed at the opening of the cap 14.
[0015]
In the mounting device for the footrest 1 having the above-described configuration, when the footrest 1 is fixedly mounted on a concrete wall 18 such as a manhole wall, the caps 14 are embedded in the concrete wall 18 at predetermined intervals. I do. .. Formed on the outer periphery of the cap 14 make it difficult for the cap 14 to come off from the concrete wall 18.
[0016]
Then, the tip of the leg 4 is arranged at the opening of the cap 14, and is driven into the hit receiving portions 10, 10 formed on the front of the foot 2 by using a hammer or the like. The leg 4 of the footrest 1 is inserted into the arm. At this time, since the air vent passages 12, 12,... Are formed between the band-shaped projections of the leg 4, the air in the cap 14 escapes and the leg 4 can be easily inserted into the cap 14.
[0017]
When the leg 4 is inserted into the cap 14, a part of the band-shaped protrusion groups 11, 11,... Formed on the leg 4 is formed by a plurality of locking grooves 16, 16 formed on the inner periphery of the cap 14. , ... respectively. By forming a large number of the band-shaped projection groups 11, 11,..., Even if the band-shaped projection 11 is crushed when the leg 4 is inserted into the cap 14, the other band-shaped projection groups 11, 11,. Are locked in the stop grooves 16, 16,... Respectively.
[0018]
In addition, the flange 13 formed at the boundary between the side portion 3 and the leg portion 4 is superimposed on the enlarged cylindrical portion 17 formed at the opening portion of the cap 14, so that the mounting strength to the cap 14 is further increased. The leg hook 1 is securely fixed to the concrete wall 18.
[0019]
Also, one end surfaces of the flange 13 and the enlarged cylindrical portion 17 may be inclined surfaces 19 and 20 according to the shape of the concrete wall 18. In this case, for example, if the end surfaces of the flange 13 and the enlarged cylindrical portion 17 are inclined surfaces 19 and 20 in accordance with the circumference of the manhole wall surface, the cap 14 is finely embedded in the concrete wall 18 of the manhole, and the footrest device 1 looks good. Can be attached well.
[0020]
Although the concrete wall 18 has been described as being a straight wall surface in this embodiment, the footrest 1 according to the present invention can be attached even if the concrete wall 18 has an inclined surface.
[0021]
【The invention's effect】
According to the first aspect of the present invention, a plurality of locking portions are formed on the leg portion of the footrest having the foot portion, the side portions located on both sides thereof, and the leg portion attached to the manhole or the like. The locking portion is locked to an inner peripheral surface of a cap buried in a concrete wall. A cap retaining projection is formed on an outer periphery of the cap, and a plurality of ribs are formed on the inner periphery. Of the cap, an enlarged cylindrical portion is formed at the opening of the cap, and a plurality of band-shaped projections arranged in the axial direction on the leg portion are divided into a plurality in the radial direction. An air vent passage is formed between the group of band-shaped projections, and a part of each group of band-shaped projections is locked in the locking groove of the cap, and a flange is formed on the side of the leg portion. Since the polymer is polymerized inside the enlarged cylindrical part of the cap, the wall of the manhole etc. The footrest for manholes, etc., in which the legs of the footwear are fitted easily and securely to the cap to be buried, and the mounting strength is increased, so that the footwear can be securely attached to the wall, such as a manhole. It becomes a mounting device.
[0022]
According to the second aspect, the flange and one end surface of the enlarged cylindrical portion are formed with an inclined surface according to the shape of the concrete wall surface, so that the footrest can be mounted with a good appearance according to the shape of the wall surface such as a manhole. This makes it possible to provide a mounting device for a foothold for a manhole or the like that can withstand long-term use of the footrest.
[Brief description of the drawings]
FIG. 1 is an explanatory plan view for attaching a footrest to a concrete wall according to an embodiment of the present invention.
FIG. 2 is a front view of a footrest.
FIG. 3 is a side view of a footrest.
FIG. 4 is a front view of the cap.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 footwear 2 footstep 3 side 4 leg 11 band-like projections 12 air vent passage 13 flange 14 cap 15 retaining ridge 16 locking groove 17 enlarged cylindrical part 18 concrete wall 19, 20 inclined surface

Claims (2)

A plurality of engaging portions are formed on the leg portion of the footrest having a foot portion, side portions located on both sides thereof, and a leg portion attached to a manhole or the like, and the engaging portion is formed on a concrete wall. In a mounting device for a foothold device for a manhole or the like, which is to be locked to an inner peripheral surface of a buried cap,
Forming a projection for retaining the cap on the outer periphery of the cap, forming a plurality of locking grooves on the inner periphery, forming an enlarged cylindrical portion at the opening of the cap,
On the leg portion, a plurality of band-shaped projections arranged in the axial direction are divided into a plurality in the radial direction, an air vent passage is formed between each of the divided band-shaped projections, and one of the band-shaped projections is formed. The cap is locked in the locking groove of the cap, a flange is formed on the side of the leg, and the flange is overlapped in the enlarged cylindrical portion of the cap. A device for mounting footrests. 2. The mounting device according to claim 1, wherein one end surface of the flange and the enlarged cylindrical portion has an inclined surface conforming to the shape of a concrete wall surface.

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