JP3235993B2 - Intermediate footrest for maintenance - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intermediate footrest for maintenance which can be attached to and detached from a plurality of footrests which are vertically installed in a manhole.

[0002]

2. Description of the Related Art Conventionally, for maintenance in a manhole, a mandrel having a footrest having a foldable footrest fixed by a fixture is disclosed in, for example, JP-A-9-195498. As shown in FIG.

[0003]

By the way, the above-mentioned known device, in which the footrest itself is fixed to the wall surface of the manhole by a fixing tool, requires an excessive amount of work for installation, and Even when folded when not in use, there is a risk that the footrest will be slightly hindered when the worker goes up and down, and that the footrest may be damaged by infiltration or the like in the manhole.

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 use a footrest installed in a manhole for an intermediate operation. It is an object of the present invention to provide an intermediate footrest for maintenance which can be easily attached and detached, does not hinder a worker from going up and down when not in use, is easily installed, and is not damaged.

[0005]

In order to achieve the above-mentioned object, an intermediate footrest for maintenance according to the present invention is a maintenance tool which can be attached to and detached from a plurality of footrests installed vertically in a manhole. Intermediate footrest for
The intermediate footrest for maintenance is composed of a rectangular footrest having a non-slip irregularity formed on the upper surface and a base for holding the footrest. An engaging portion engageable with the upper and lower footrests is formed, and a bearing portion for fixing one side of the hinge for holding the footrest portion and pivoting one end of the guide arm is formed, and one end of the footrest portion is formed. The other side of the hinge is fixed to the part , and the other end of the guide arm is pivoted on the side of the footrest part .
Pin on the side of the footrest from the middle
The pin is slid toward one end to form a slot that can slide.
Guide arm between the bearing for the pivot and the long hole
-It is characterized by being connected by a

[0006]

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 relate to an embodiment of an intermediate foothold for maintenance according to the present invention .
FIG. 1 is a side view of a partial cross section of the intermediate footholding tool for maintenance,
FIG. 2 shows a plan view thereof .

In the figure, reference numerals 1a, 1b, 1c... Denote footrests which are fixed to the manhole wall 2 in the vertical direction, and all of the footrests 1a, 1b, 1c. Reflectors 4 and 4 are provided at both ends of the foot-shaped portion 3 in the shape of a letter.

Reference numeral 5 denotes a maintenance footrest, which comprises a base 6 and a footrest 7.
These are made of aluminum plywood or synthetic resin to reduce the weight.

The base 6 has an L-shaped latch which can be engaged with, for example, the footrests 1b, 1c among the footrests 1a, 1b, 1c... Fixed in the manhole. A hinge 8 for holding the footrest 6 so that it can be folded, and a guide arm 10
Is formed at one end of which is pivoted.

The footrest 7 is formed in a rectangular shape having unevenness 12 for preventing slipping on the upper surface.
The other side of the hinge 9 having one side fixed to the base 6 is fixed to one end of the base 6.

Then, on the side of the footrest 7,
A long hole 14 is formed toward one end of the footrest 7
The guide arm 10 is composed of a single rod.
One end of the door arm 10 is pivoted on the bearing 11 and the other end is
It is pivoted on a pin 15 arranged on the side of the footrest 7 and
A pin 15 is slidable in the elongated hole 14.

In the embodiment described above, when maintenance in the manhole is not required, the intermediate footrest 5 for maintenance is detached from the footrests 1b and 1c fixed and installed in the manhole. Because it is folded and outside the manhole, the inside of the manhole has foot rests 1a, 1b, 1c ...
You can freely go up and down by using.

When maintenance is required in the manhole, the base 6 of the intermediate footrest 5 is attached to upper and lower footrests, for example, the footrests 1b and 1c in the vicinity of the location requiring maintenance. Are engaged, and the footrests 7 are sequentially opened as shown by the imaginary lines in FIG. 1 to be substantially horizontal as shown in the figure. At this time, the footrest 7 is securely guided by the guide arm 10 and securely holds the footrest 7 substantially horizontally.

In this state, the operator can perform maintenance on the manhole by placing his / her feet on the footrests 7 which have wide feet and are difficult to slide.

[0016]

[0017]

[0018]

According to the present invention, an intermediate footrest for maintenance according to the present invention is provided.
Can be attached to and detached from footholds that are installed in multiple stages in the manhole vertically.When maintenance inside the manhole is not required, fold it out of the manhole as appropriate. Thus, the worker can freely move up and down using the footrests installed in the manhole, and can avoid damage to the intermediate footrests for maintenance.
In addition, when maintenance in the manhole is required, the intermediate footrest for maintenance can be easily attached to a desired position by using the footrest that has been installed, and the slipper having a wide foot can be easily mounted. The foot can be placed on the foot rest that is difficult to slip, and the maintenance in the manhole can be performed reliably.

[Brief description of the drawings]

FIG. 1 is a side view of a partial cross section of an intermediate footholding device for maintenance according to an embodiment of the present invention.

FIG. 2 and FIG. 2 is a flat view.

[Explanation of symbols]

1a, 1b, 1c Footrest fixed to manhole 2 Manhole wall 5 Intermediate footrest for maintenance 6 Base 7 Footrest 8a, 8b Locking part 9 Hinge 10 Guide arm 11 Bearing 12 Non-slip irregularities 14 Slot 15 Pin

Claims (1)

(57) [Claims] An intermediate footrest for maintenance which can be attached to and detached from footwear installed in a plurality of stages vertically in a manhole, wherein the intermediate footwear for maintenance is non-slip on an upper surface. And a base for holding the footrest.
Forming a locking portion engageable with upper and lower footholding tools in the rack, and forming a bearing portion for fixing one side of a hinge for holding a footrest portion and pivoting one end of a guide arm; The other side of the hinge is fixed to one end of the footrest, and the guide
-Place a pin that pivots the other end of the
The pin can slide from one end to one end of the footrest
A long hole is formed to form a bearing for the guide arm pivot
An intermediate footrest for maintenance, wherein the intermediate armrest is connected to the hole by a guide arm.