JPH0617870Y2 - Manhole opening device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a device for mounting a manhole opening when replacing an iron cover of a manhole.

[Conventional technology and its problems]

FIG. 7 shows an opening (neck) of the manhole. Bricks 2 are vertically stacked around the opening of the upper floor slab 1, and a lid receiver 3b is placed on the bricks 2 and fixed with a mortar 4. FIG. 8 shows a case where a building block 5 is stacked instead of the brick 2 as another example. In any case, in order to replace the lid 3a and the lid receiver 3b for receiving it, it is necessary to dismantle the mortar 4, the bricks 2 and the building block 5 thereunder.

Conventionally, this was done using a breaker, a pick, or the like, but it was noisy, was directly connected to complaints, and limited work at midnight.

The present invention eliminates the capital loss of the above-mentioned conventional example, can work without noise, has a simple structure and can be manufactured at low cost, and has an efficient destructive force by supporting at two points. It is an object of the present invention to provide a hanging device for a manhole opening which is intended to prevent falling inside.

[Means for solving problems]

In order to achieve the above object, the present invention fits a cylindrical connecting ring on the cylinder end of a jack that can be horizontally hung by a column standing upright from the manhole, and accommodates an adjusting member having a screw portion inside the connecting ring. The screw part of the wedge of which the tip is taper cut is screwed into the screw part of the adjusting member, while the wedge of the same shape is attached to the rod end of the jack in the opposite direction to the wedge, and the manhole opening The gist of the present invention is that a glass receiving plate whose lower end is covered from the inside is provided by suspending it from a pillar standing upright from the manhole.

[Action]

According to the present invention, since the cylindrical connecting ring is fitted to the cylinder end of the jack and the adjusting member having the threaded portion is housed inside the connecting ring, the length of the adjusting member can be adjusted to adjust the length of the jack. Simply adjust the insertion depth into the connecting ring by changing the.

At the time of installing the jack, if the jack is hung horizontally in a contracted state and extended in the neck of the manhole, the wedges in opposite directions tend to be separated from each other and their tips are pressed into the brick or the building block.

Since the wedges are lined up in a straight line, one of them acts as the other reaction force member, and this press-fitting is efficiently performed.

Also, since the wedges are connected with screws, only the wedges can be easily replaced if they break.

Furthermore, the rattle receiving plate closed from the inside of the manhole receives the rattle that is generated when hanging on the wedge.

〔Example〕

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side view showing an embodiment of a lifting device for manhole openings according to the present invention. In FIG. 1, 6 is a hydraulic jack consisting of a cylinder 7 and a rod 8, and 9 is a hydraulic hose mounting portion of the cylinder 7.

A wedge 11 having a tapered tip is horizontally attached to one end of the cylinder 7, and a cylindrical connecting ring 10 is first fitted to the end of the cylinder 7 and an inner diameter of the connecting ring 10 is used as an adjusting member to form a female screw hole. The adjusted adjustment ring 13 is stored in the female threaded hole of the adjustment ring 13
11b was screwed.

This is because the connecting portion of the wedge 11 cannot be formed directly on the cylinder 7, but by changing the adjusting ring 13 to one of various lengths, the insertion depth into the connecting ring 10 changes,
The total length of the hydraulic jack 6 can be adjusted.

The rod 8 projecting from the cylinder 7 of the hydraulic jack 6 has its tip formed as a screw 8a, which is screwed into a screw hole 12b provided at the base of the wedge 12 whose tip is tapered like the wedge 11.

In this way, the wedges 11 and 12 are attached to the left and right of the jack 6 in opposite directions. In this example, the wedge 11
The mounting part is a male type, and the wedge 12 is a female type mounting part. However, as another embodiment, as shown in FIG. 3, instead of the adjusting ring 13 as an adjusting member, a cylindrical body having a screw protrusion 14a is provided. It is also possible to use 14 and use the wedge 11 as the female part of the attachment part for the attachment part so that the screw protrusion 14a is screwed into the screw hole.

If the wedges 11 and 12 have exactly the same shape, they are compatible with each other and the number of parts is small.

The suspension ring 15 is provided on the cylinder 7 and the connection ring 10, and the mounting portion 9
A hydraulic hose 17 from a manual hydraulic pump 16 was connected to.

In the figure, reference numeral 18 denotes a column 18 standing upright in the manhole. The column 18 suspends the hydraulic jack 6 horizontally, and the support plate 19 is provided below the position where the hydraulic jack 6 is suspended. Install so that the lower end of the manhole opening is covered from the inside.

The rattle receiving plate 19 may be suspended by the same column 18 as the hydraulic jack 6, but may be suspended by another column (not shown).

Next, usage and operation will be described.

FIG. 4 to FIG. 6 are side views showing a use state, in which the rod 8 of the hydraulic jack 6 is contracted and laid horizontally so that the device of the present invention is hung in the neck of the manhole. Then, when the rod 8 is extended by applying hydraulic pressure, the wedges 11 and 12 try to separate from each other, and the tips thereof are press-fitted between the bricks 2 to be broken. The periphery of the lid receiver 3b is cut with a cutter or the like from the road, and the lower portion of the lid receiver 3b is suspended by the wedges 11 and 12. If one portion is broken in this way, the angle is changed at the same level and the jack is repeatedly extended and contracted to pull it in the circumferential direction, and the lid receiver 3b is removed.

Further, similarly, the lower bricks 2 and the like can be broken in the same manner, and the broken debris at that time is received by the debris receiving plate 19 and does not fall into the manhole.

[Effect of device]

As described above, the manhole opening device of the present invention is designed to work by press-fitting a wedge, and unlike a breaker or the like, it can work without noise and vibration.

Also, since two wedges are arranged in opposite directions and press-fitted in opposite directions, one acts as a reaction force member for the other, and two-point support enables efficient destruction with little loss. Is done.

Furthermore, since it is a simple device that combines a jack and a wedge, it can be manufactured at low cost, is a handy type, compact, and easy to handle.

Especially, to adjust the total length of the jack, you only have to change the length of the adjustment member and adjust the insertion depth into the connection ring.

In addition, since it is closed by the backing plate so as to cover the inside of the manhole, it is possible to prevent the glass generated by the wedge when hanging from falling into the manhole.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a lifting device for manhole openings of the present invention, FIG. 2 is an exploded side view of the same as above, FIG. 3 is a perspective view showing another example of a wedge mounting member, and FIG. ~ Fig. 6 is a side view showing a use state, and Figs. 7 and 8 are longitudinal side views showing details of the manhole opening. DESCRIPTION OF SYMBOLS 1 ... Upper floor slab 2 ... Brick 3a ... Lid 3b ... Lid receiver 4 ... Mortar, 5 ... Construction block 6 ... Hydraulic jack, 7 ... Cylinder 8 ... Rod, 8a ... Screw 9 ... Hydraulic hose attachment 10 ... Connection ring, 11, 12… wedge 11b… screw part, 12b… screw hole 13… adjustment ring, 14… cylinder 14a… screw protrusion 15… suspension ring, 16… hydraulic pump 17… hydraulic hose, 18… strut 19… rattle receiving plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Atsushi Sato 4-13-13 Akasaka, Minato-ku, Tokyo Kyowa Denshi Co., Ltd. (72) Inventor Yoshihiro Hotta 4-13-13 Akasaka, Minato-ku, Tokyo Kyowa Denki Co., Ltd. Co., Ltd. (72) Inventor Saito Isao 4-13-13 Akasaka, Minato-ku, Tokyo Kyowa Denshi Co., Ltd. (56) References JP 62-50527 (JP, A) Actual development 59-193679 (JP) , U) Actual development Sho 62-100984 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A cylindrical connecting ring is fitted to a cylinder end of a jack which can be horizontally hung by a column standing upright from a manhole, and an adjusting member having a screw portion is housed inside the connecting ring, and a screw portion of the adjusting member. The threaded portion of the wedge root portion with the taper cut at the tip is screwed in, while the same rod shape is attached to the rod end of the jack in the opposite direction to the wedge, and the lower end of the manhole opening is covered from the inside. A hanging device for a manhole opening, characterized in that a supporting plate for supporting a manhole is provided by being suspended from a pillar standing upright from inside the manhole.