JPH0540207U - Manhole cover opening and closing device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an opening / closing device for a manhole cover that does not require heavy equipment such as a tow truck and can be easily moved. [Structure] A hook 2 capable of suspending the lid 20 is provided by being locked to a part of a lid 20 of a manhole, and a support 1 having the hook 2 suspended at a constant interval is provided.
Flexible jacks 3 are arranged on both sides of the hook 2 to hold the support 2 so that the support 2 can move up and down, and the whole can be run by a wheel 4 provided at a mounting portion of the jack 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for opening and closing a heavy lid, especially a large manhole lid.

[0002]

[Prior Art]

 Conventionally, in water conduits, culverts, etc., people come in and out of the pipes for cleaning and inspection.Therefore, a manhole communicating with the pipe is provided, and this manhole is usually covered with a lid when not in use. It is being appreciated. In order to open and close the lid, it is heavy and large, especially when the weight is 1 ton and the diameter exceeds 1.2 m, it is necessary to install a tow truck for lifting the lid.

[0003]

[Problems to be solved by the device]

 However, in such a case, since a large area occupies a place such as a general road where a manhole is provided, and the work becomes large, it is necessary to consider traffic and it is difficult to move the work equipment. Therefore, work efficiency is poor.

Therefore, it would be advantageous if the lid could be opened and closed with a simple device without using a heavy machine such as a wrecker. The present invention has been made in view of such circumstances, and an object of the present invention is to provide a manhole cover opening / closing device that does not require heavy equipment such as a wrecker and can be easily moved.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention has the following configuration. That is, a hook 2 is provided, which is hooked to a part of the manhole cover 20 to suspend the cover 20, and the hook 2 is hung at a constant interval to form a support 1. In addition, telescopic jacks 3 are arranged on both sides of the hook 2 to hold the support 2 so that the support 2 can move up and down, and the whole can be traveled by wheels 4 provided on the mounting portion of the jack 3. .

Various types of jacks can be used as the jack 3. For example, the jack 3 can be bent by being connected by a link member screwed to a rotary shaft and can be bent. It is possible to use a screw jack or the like formed with.

[0007]

[Action]

 Since the present invention has the above-mentioned structure, the support 1 moves up and down when the jack 3 is operated, so that the hook 2 is set at a position where the hook 2 can be locked with the lid 20 of the manhole and the hook 2 is fixed. After engaging with the lid 20, the jack 3 is moved up. Then, the lid 20 rises and the manhole 22 is opened.

Further, the entire device can be moved by the wheels 4 and can be moved even when the lid is lifted.

[0009]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall perspective view showing an outline of an opening / closing device of the present invention, and FIG. 2 is a perspective view showing a state where a lid is lifted by this device. This opening / closing device is provided with a long support 1 made of channel steel, and expandable and contractible screw jacks 3 are attached to both ends of the support 1. A convex portion 12 is formed on the tops of the screw jacks 3 and 3, and the convex portion 12 is fitted and fixed in the through hole 9 of the support 1. The screw jacks 3, 3 and the rotary shaft 5 are connected by a link member 7 that is screwed together so that they can be bent, and a rhombus-shaped expandable portion 6 around the rotary shaft 5 is formed. Then, by connecting a crank or the like to the rotating shaft 5 and rotating it, it is possible to manually extend or contract.

Further, hooks 2, 2 each having a lower end bent into a hook shape hang down from the support 1. The hooks 2 and 2 are movable in a direction (vertical direction) perpendicular to the longitudinal direction of the support 1, and are locked to the support 1 at predetermined positions. That is, the intermediate portions 8 of the hooks 2, 2 are rod-shaped that penetrates through the through holes 9 provided in the support body 1 and slides, and the thumbscrews 10 and the like screwed into the screws formed in the intermediate portions 8 , It is a structure that locks at a fixed position. The support 1 is provided with a plurality of through holes 9 in the longitudinal direction, and the positions of the hooks 2 are changed along the length of the support 1 in accordance with the diameter of the lid 20 to be lifted. be able to.

With the movement of the positions of the hooks 2 and 2, the attachment positions of the jacks 3 and 3 can be changed. This is done by changing the through hole 9 of the support 1 that fits into the convex portion 12 of the jack 3.

Further, the entire apparatus can be driven by the wheels 4 and 4 provided on the base portion 11 of each jack 3 by two. On the other hand, at both ends of the lid body 20, hooking portions 21, 21 for hooking the hooks 2, 2 are provided.

The device of this embodiment is used as follows. First, the apparatus is installed so that the support 1 is located above the manhole cover 20. Then, the through hole 9 through which the hooks 2 and 2 penetrate is selected, the position of the hook 2 is adjusted so as to correspond to the hooking portion 21 of the manhole 22, and the hook 2 is hooked to the lid 20.

Next, when the jacks 3 and 3 are extended and the support 1 is moved upward, the hooks 2 and 2 ascend while suspending the lid 20, and this is opened. When this device is run, the lid 20 moves in a suspended state, so that the obstacle on the manhole 22 can be easily removed.

In order to close the lid 20, the device is run in the opposite manner to set the lid 20 at a predetermined position on the manhole 22, and both jacks 3 and 3 are contracted to close the lid 20. Align 20 with manhole 22 and lower it to close it.

[0016]

[Effect of the device]

 As described above, according to the present invention, since the support body is formed by suspending the hooks at regular intervals, and the support body is held so as to be movable up and down by the elastic jack, it is possible to use heavy equipment such as a wrecker. You can easily open and close the lid of a large manhole without using it.

Further, since the device can be moved quickly, the working time can be shortened, and the space around the manhole is not occupied so much that the influence on the surroundings caused by the work can be reduced. You can

[Brief description of drawings]

FIG. 1 is an overall perspective view showing an outline of an opening / closing device of the present invention.

FIG. 2 is a perspective view showing a state where the lid body is lifted by the opening / closing device.

[Explanation of symbols]

 1 Support 2 Hook 3 Jack 4 Wheel

Claims (1)

[Scope of utility model registration request] 1. A hook (2) which can be suspended from a part of a lid (20) of a manhole so as to suspend the lid (20).
To form a support body (1) in which the hooks (2) are hung at regular intervals, and expandable and contractible jacks (3) are arranged on both sides of the hooks (2). A manhole cover opening / closing device, characterized in that it holds a body (2) so that it can move up and down, and that the whole body can travel by means of wheels (4) provided in the mounting portion of the jack (3).