JPH0547047U - Simple manhole cover device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a lightweight manhole cover that is convenient to handle. [Structure] A lattice-shaped bisection semicircular manhole cover (1), and when the manhole cover is inserted into a receiving frame (4) of a manhole body, the manhole cover has an outer periphery and an inner periphery of the receiving frame. A simple manhole cover device provided with a clip (7) made of an elastic material placed in between.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a simple manhole cover device, and more specifically, when a vehicle or the like passes over a manhole during work such as cable laying in a manhole on a narrow road or connecting core wires, it may interfere with passing vehicles. The present invention relates to a manhole cover device manufactured in a lattice (grating) that is temporarily (temporarily) used so as not to cause it.

[0002]

[Prior Art]

 Conventionally, when a vehicle, etc. passes over a manhole while working in a manhole on a narrow road, the work is interrupted, and the manhole cover (large size about 200 kg, small size about 130 kg) is removed from the manhole. It was closed by two people and was passing vehicles. After passing, one or two people opened the manhole cover again.

[0003]

[Problems to be solved by the device]

 However, the manhole cover was heavy, and depending on where the manhole was installed, there were places where one person could not open or close it. Also, with the conventional method, it took time to open and close the manhole cover temporarily, and there was concern about safety. The present invention was proposed in order to improve the above-mentioned drawbacks, and the purpose thereof is to make the lid into a shape of a chip and to divide the lid into two (half) to reduce the weight (about 35 kg on one side). It is an object of the present invention to provide a lid device that allows one person to open and close the lid.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a lattice-shaped bisection semicircular manhole cover, and an outer periphery of the manhole cover when the manhole cover is inserted into a receiving frame of a manhole body. It is an object of the invention to provide a simple manhole cover device including a clip made of an elastic material installed between the inner circumference of the receiving frame.

[0005]

[Action]

 According to the present invention, by constructing the lid in a grid pattern and dividing the lid into two parts, the lid is lightweight, convenient to handle, and working efficiency can be improved.

[0006]

【Example】

 Next, an embodiment of the present invention will be described. FIG. 1 shows a lattice-shaped manhole cover of the present invention. In the figure, (A) shows the left half of the manhole cover, and (B) shows the right half. The main bodies 1 and 2 have a lattice shape, respectively. It is made into two halves. A ring 3 for preventing movement is joined to the bottom of the main body 1. This lid is made of metal such as iron, and as an example, the diameter of the main body is 920 mm, the diameter of the ring is 850 mm, and the thickness is 75 mm. The lattice spacing is 35 × 100 mm.

FIG. 2A shows a state in which the manhole cover 1 of the present invention is attached to the manhole receiving frame 4, and a step portion 5 is formed on the inner side of the upper portion, and the step portion 5 moves to the lower side of the step portion 5. A groove 6 for inserting the prevention ring 3 is provided, and when the manhole lid of the present invention is mounted on the step portion 5 of the receiving frame 4, the step portion 5 of the receiving frame 4 is prevented to prevent the lid from jumping up from the receiving frame 4. A clip 7 made of an elastic material is inserted between the inner circumference of and the outer circumferences of the manhole covers 1 and 2. (B) shows the lid body 1.

FIG. 3 is an enlarged view showing a state where the clip 7 is inserted. With this clip, the manhole cover 1 is pressed and fixed to the receiving frame 4.

4A and 4B are detailed views of the clip. FIG. 4A is a front view, FIG. 4B is a side view, and FIG. 4C is a side view seen from obliquely above.

When the lid of the present invention is used, the lid body 1 (left half) is attached to the manhole receiving frame 4, the lid body 2 (right half) is not attached to the manhole receiving frame, and is used as an entrance / exit for workers, which is necessary. In some cases, the left half of the main body is also attached to the receiving frame.

[0011]

[Effect of the device]

 As described above, according to the present invention, a lattice-shaped bisection semicircular manhole cover and, when the manhole cover is inserted into the receiving frame of the manhole body, the outer periphery of the manhole cover and the inside of the receiving frame. Since the manhole cover is divided into two parts (half) by having a clip made of an elastic material installed between the circumference, it is possible to reduce the weight and to open and close the cover easily by one person. It has the effect of improving the sex.

[Brief description of drawings]

FIG. 1 shows a manhole cover of the present invention, (A) showing a left half and (B) a right half.

2A and 2B show a state in which a manhole cover is attached to a manhole receiving frame, FIG. 2A is a sectional view, and FIG. 2B is a plan view of a main body.

FIG. 3 shows a detailed view of a manhole cover attached to a manhole receiving frame.

FIG. 4 shows a clip, (A) is a front view,
(B) shows a side view, and (C) shows a side view seen from obliquely above.

[Explanation of symbols]

 1 Lid body 2 Lid body 3 Movement prevention ring 4 Manhole receiving frame 5 Step 6 Groove 7 Clip

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Ono 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Inside Nippon Telegraph and Telephone Corporation (72) Tadashi Chiba 1-6-1, Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation

Claims (1)

[Scope of utility model registration request] 1. A lattice-shaped bisecting semi-circular manhole cover, and when the manhole cover is inserted into a receiving frame of a manhole body, the manhole cover is installed between the outer periphery of the manhole cover and the inner periphery of the receiving frame. A simple manhole cover device comprising a clip made of an elastic material.