JP2579498Y2 - Edge opening and closing device for manhole iron lid - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening and closing device for opening and closing a manhole iron cover for lifting the manhole iron cover.

[0002]

2. Description of the Related Art In general, when a manhole iron cover is separated from a manhole frame and lifted, sand or the like accumulates at joints between the manhole frame and the manhole iron cover, and the manhole frame is opened only by human power due to adhesion of a waterproof packing or the like. Becomes difficult. Therefore, an opening / closing rim device is used to facilitate opening of the iron cover.

[0003] A conventional opening / closing edging device is such that a bracket is rotatably mounted on a connecting shaft to which a hook for hooking on a handle portion of a manhole iron cover is provided, and an edge cutting roller is provided at one end of the bracket and a transport wheel is provided at the other end. Are rotatably supported, the bracket is rotated by a handle, the edge cutting roller is pressed against the ground, and the manhole iron cover is levitated on the principle of leverage. This device is applied to the left and right handles of the manhole iron cover, respectively.

[0004]

However, the conventional structure has a problem that the number of components is increased and the bracket needs to be rotated, which complicates the structure and takes much time to manufacture. is there. Further, the weight of the opening / closing edging device is increased by the number of parts, which makes it inconvenient to carry.

SUMMARY OF THE INVENTION An object of the present invention is to provide an opening and closing device for opening and closing a manhole iron cover without the above-mentioned conventional disadvantages.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a main rod having an elongated hole at one end side along a longitudinal direction, and a handle portion of a manhole iron cover attached to the elongated hole of the main rod so as to be adjustable. A hook for stopping, and a jack portion disposed outside the manhole frame for lifting and lowering the main rod, the jack portion has a pedestal arranged on the ground, and a lower end portion of the pedestal. An opening / closing rimping device for a manhole iron cover, comprising: a lifting screw rod rotatably supported and screwed to the main rod side.

[0007]

[Function] First, the jack portion is disposed outside the manhole frame. Then, the hook is locked to the handle of the manhole iron cover. At this time, the position of the hook is adjusted along the long hole of the main rod.

Next, the screw rod is turned. The screw rod is screwed to the main rod side. Therefore, the main rod is lifted by the screwing of the screw rod. At this time, the screw rod idles in the pedestal of the jack portion. As described above, since the main rod is lifted, the hook attached to the main rod is also lifted. As a result, the manhole iron lid is lifted. That is, the manhole iron lid is cut off.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the accompanying drawings. As shown in FIGS. 1 to 3, the opening and closing device for opening and closing a manhole iron cover according to the present invention has a main rod 1 having an elongated hole 11 at one end, and is attached to the elongated hole 11 of the main rod 1 so as to be adjustable in position. A hook 2 for engaging the handle of the iron cover, and the main rod 1 disposed outside the manhole frame.
And a jack portion 3 for raising and lowering the pedestal. The jack portion 3 includes a pedestal 31 arranged on the ground, and the pedestal 31.
And a screw rod 32 that is idle and screwed to the main rod 1 side.

The details will be described below. The main rod 1 is formed in a U-shaped cross section. In this example, a so-called C-type channel is used as the main rod 1. An elongated hole 11 is provided at one end of the main rod 1 along its longitudinal direction. The long hole 11 is open on one side.

The hook 2 is provided with a male thread 21 on the base side. A nut 22 is screwed into the male screw portion 21 above the long hole 11, and the nut 2 supports the hook 2 at both edges of the long hole 11. The height of the hook 2 can be adjusted by adjusting the screwing position of the nut 22. The jack part 3 has a pedestal 31. The pedestal 31 includes a substrate 311 disposed on the ground and the substrate 3
And a support frame 312 having a U-shaped cross section fixed to the upper surface of the support frame 11.

The jack part 3 has a screw rod 32 screwed from an insertion hole 36 formed at the other end of the main rod 1 into a nut 35 fixed to a lower peripheral edge of the insertion hole 36. Further, a nut 37 is fixed at a position above the support frame 312 of the screw rod 32. The tip of the screw rod 32 at the lower position of the support frame 312 faces the support frame 33,
The nut 38 is screwed. Note that a handle 40 for screwing the screw rod 32 is fixed to the upper end of the screw rod 32.

Next, the operation will be described. First, the pedestal 31 of the jack part 3 is arranged outside the manhole frame.
Further, the hook 2 is engaged with the handle of the iron cover of the manhole. In this example, since one side of the long hole 11 is opened, it is easy to lock the hook 2 to the handle of the manhole iron cover. After adjusting the position of the hook 2 in the elongated hole 11, the nut 22 is screwed around the male screw portion 21. As a result, the hook 2 is fixed.

Next, the screw rod 32 is turned by the handle 40. The screw rod 32 includes a nut 3 fixed to the main rod 1.
5 is screwed. Therefore, the main rod 1 is lifted by the screwing of the screw rod 32. At this time, screw rod 3
The tip of 2 is supported on the pedestal 31 of the jack portion 3 between the nuts 37 and 38 and idles.

As described above, since the main rod 1 is lifted, the hook 2 attached to the main rod 1 is also lifted. As a result, the manhole iron lid is lifted. That is, the manhole iron lid is cut off. In this example, one side of the long hole 11 is opened, but the present invention is not limited to this. One side of the long hole 11 may not be opened. In addition, the jack portion 3 may have a structure in which the distal end of the screw rod 32 idles in the pedestal 31, and is not limited to the structure of the embodiment.

[0016]

As described above, the opening and closing device for opening and closing a manhole iron cover according to the present invention has an excellent structure such that its construction is simple, its manufacture is easy, its weight is light, and it can be easily carried. effective.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of an opening / closing edging device for a manhole iron cover according to an embodiment.

FIG. 2 is a plan view of the opening / closing edge cutting device according to the embodiment.

FIG. 3 is a side view of the opening / closing edge cutting device of the embodiment.

[Explanation of symbols]

 Reference Signs List 1 main rod 11 long hole 2 hook 3 jack part 31 pedestal 32 screw rod

Claims (1)

(57) [Scope of request for utility model registration] 1. A main rod having an elongated hole on one end side along a longitudinal direction, a hook for locking a handle portion of a manhole iron lid attached to the elongated hole of the main rod so as to be adjustable, and a manhole. A jack portion arranged outside the frame for raising and lowering the main rod, the jack portion is a pedestal arranged on the ground, and a lower end portion is supported by the pedestal so as to be freely rotatable, and An opening / closing rim device for opening and closing a manhole iron cover, comprising a lifting screw rod screwed to the main rod side.