JPH0743185Y2 - Opening device for underground structures - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool body formed in a rod shape so as to pry up a lid body for closing an opening of an underground structure, and an engaging member formed at an edge portion of the lid body for inserting a tip thereof. The present invention relates to a lid opening device including an abutment.

[0002]

2. Description of the Related Art Various manholes and tools for opening lids of manholes and other underground structures have been known. However, as disclosed in Japanese Utility Model Publication No. 2-20276, the conventional one has a problem that the lid opening operation is likely to be unstable because a lid opening tool having a T-shaped tip is used, for example. This kind of iron lid weighs several tens of kilograms or more, and if it loses stability, it is dangerous to slide from the opening fulcrum to the left and right.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and its object is to enable stable and safe opening operation.

[0004]

In order to solve the above problems, the present invention solves the above problems by engaging holes 4 formed in a tool body 3 and a lid 2.
And a lid opening device is constituted by the
The notch 5 is formed by notching the edge of the notch 5, and the small opening 6 opened at a position slightly distant from the notch 5 into the inside of the lid is communicated with the notch 5 by the connecting portion 7, and the engaging port 4
Substantially H-shaped engaging hook 9 that can be inserted into the intermediate portion 8 formed between the cutout portion 5 and the small opening 6
Is formed at the tip of the tool body 3, and a rear projection 11 is provided on the back of the engaging hook 9 for engaging with the frame 10 of the opening 1 with the engaging hook 9 inserted into the engaging opening 4. Further, a means is provided in which the left and right protrusions 12 and 12 'that can be locked to the upper surface of the lid 2 in the same state are provided on the side portions of the engaging hooks 9.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will be given below with reference to the drawings. The illustrated underground structure has a circular lid 2 supported by a frame 10 to close the circular opening 1. The lid opening device includes a tool body 3 formed in a rod shape so as to pry open the lid body 2 by a lever action, and an engagement opening 4 formed at an edge portion of the lid body 2 for inserting the tip thereof.

The engagement port 4 has a notch 5 formed by cutting the edge of the lid 2 outward in a substantially U-shape, a small opening 6 opened slightly inward from the notch 5, and It is composed of a connecting portion 7 which penetrates the cutout portion 5 and the small opening 6 and connects them. In the case of the embodiment, the engagement port 4 is formed in a bag shape 13 on the lower surface (back surface) of the edge portion of the lid body 2, and the inside communicates with the outside only at the cutout portion 5 and the small opening 6.

A substantially J-shaped engaging hook 9 which engages with an intermediate portion 8 formed so as to remain in the lid body 2 between the cutout portion 5 and the small opening 6 has a tip portion (lower end portion) of the tool body. ) Is formed. The engaging hook 9 is formed in a J shape so as to be inserted from the cutout portion 5 through the connecting portion 7 to the small opening 6, and therefore, the engaging hook 9 can be caught on the intermediate portion 8 in the inserted state. (Figure 3). In addition, a bent portion 14 is formed in a portion of the tool main body 3 following the engaging hook 9 so that force can be easily applied during the work.

Protrusions 11, 12, and 12 'are integrally formed on the back surface and the left and right side surfaces of the engaging hook 9, respectively. The rear protrusion 11 is provided at a position to be locked on the frame portion (reception frame) 10 surrounding the opening 1 with the engagement hook 9 inserted into the engagement opening 4, and the left and right protrusions 12 and 12 'are Similarly, it is provided at a position where it can be locked to the upper surface of the lid body 2 with the engaging hook 9 inserted in the engaging portion 4.

The side surface of the locking hook 9 is substantially J-shaped as described above, but this operation is performed by inserting the engaging hook 9 into the engaging port 4 so as to rotate around the intermediate portion 8. Also easy to do. Further, reference numeral 15 denotes a prying portion formed at the other end of the tool body 3, and 16 denotes a handle provided in a lower portion thereof in a cross shape.

In the lid opening device according to the present invention thus constructed, the engaging hook 9 is inserted into the engaging opening 4 from the notch 5 of the closed lid 2, and the tip 17 of the engaging hook 9 is small. Insert it into the opening 6 from below until it fits (Fig. 2, Fig. 4, solid line). Then, when the handle 16 of the tool main body 3 is pulled toward the front side, the rear protrusion 11 is locked to the receiving frame 10 to serve as a fulcrum, and the upper surface 18 of the engaging hook 9 contacts the lower portion 19 of the intermediate portion 8. They come into contact with each other and become an action point and are pryed open from below, so that the lid body 2 is lifted.

Further, since the left and right protrusions 12 and 12 'are engaged with the upper surfaces of the lids on both sides of the notch from above, the edge portion of the lid body 2 from above and below by the upper surface portion 18 of the engaging hook 9. It is fixed so that it can be sandwiched and can prevent the lid from shaking. By further lifting the handle 16, the lid 2 is moved to the frame 10
Can be lifted up. Even if the bag-shaped portion 13 is filled with earth and sand, it is easy to insert the J-shaped engaging hook 9 into the engagement opening 4, and the accumulated earth and sand is also on both sides of the cutout 5 and the small opening 6. Can be removed more.

[0012]

Therefore, according to the present invention, the lid body 2 is pryed by the engaging hooks 9 at the engaging openings 4 during the opening operation, and at that time, the left and right protrusions 12, 12 of the engaging hooks 9 are operated. Since ′ can press the lid body 2 to the left and right for stability, it becomes possible to safely handle the lid body 2 which is open and moving, and the lid body 2 which is a heavy object can be slid or Since it does not slide in the direction in which it does not occur, it contributes to improving the safety of work and has the effect of opening the lid smoothly.

[Brief description of drawings]

FIG. 1 is a perspective explanatory view showing an embodiment of a lid opening device for an underground structure according to the present invention.

FIG. 2 is a perspective view of a main part of the same usage state.

FIG. 3 is a cross-sectional view of a state in which the tool body is inserted into the engagement opening.

FIG. 4 is a sectional view showing a state in which a lid is opened by a tool body.

FIG. 5 is an overall perspective view of the above.

Claims (2)

[Scope of utility model registration request] 1. A tool main body 3 formed in a rod shape so as to pry open a lid 2 that closes an opening 1 of an underground structure, and an engagement opening 4 formed at an edge portion of the lid 2 for inserting the tip thereof. And the notch at the edge of the lid body 2 as the engagement port 4,
While forming the cutout 5, the small opening 6 opened at a position slightly distant from the cutout 5 toward the inside of the lid and the cutout 5 are connected to each other by the connecting portion 7, and can be inserted into the engaging opening 4. In addition, a substantially J-shaped engaging hook 9 that engages with the intermediate portion 8 formed between the cutout portion 5 and the small opening 6 is formed at the tip of the tool body 3, and the engaging hook 9 is engaged. Rear protrusions 11 that are locked to the frame 10 of the opening 1 when inserted into the back of the engaging hooks 9 and can be locked to the upper surface of the lid 2 in the same state. , 12 'are provided on the sides of the engaging hooks 9 to open the underground structure. 2. The underground structure according to claim 1, wherein the engagement opening 4 is formed in a bag shape on the lower surface of the edge portion of the lid body 2 and communicates with the outside through the cutout portion 5 and the small opening 6. Lid opening device.