JP3195866B2 - Hook stopper for 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 a stopper for a hook of an iron cover, particularly, it is not necessary to remove the iron cover when opening the iron cover, and there is no risk of damage by a car or the like. The present invention relates to a hook plug for an iron cover, which can minimize the entry of rainwater and dust into a manhole.

[0002]

2. Description of the Related Art Conventionally, in order to prevent rainwater and dust from entering a manhole from a hook hole formed in an iron cover,
A rubber stopper 2 as shown in FIG. 9 was fitted into the hook hole 3 of the iron cover 1 from the outside to close the hook hole 3. Hereinafter, this rubber stopper 2 is referred to as a conventional technique.

The rubber stopper 2 comprises a lid 2A having an area larger than the diameter of the hook 3 and a foot 2B formed at the lower portion of the lid 2A and having a width larger than the opening width of the hook 3. I have. The foot 2 </ b> B inserted into the hook 3 spreads by the elastic force after passing through the hook 3, and prevents the rubber stopper 2 from coming off.

[0004]

However, the above-mentioned prior art has the following problems. When opening the iron lid 1, it is necessary to remove the rubber stopper 2 from the inside of the hook hole 3, but to remove the rubber stopper 2 from the inside of the hook hole 3, it is necessary to pry open the rubber stopper 2 with a driver or the like. When the iron cover 1 is closed, it is necessary to push the foot 2B of the rubber plug 2 into the hook hole 3 against the elastic force of the rubber plug 2. Thus, the operation of attaching and detaching the rubber stopper 2 is troublesome.

Since the rubber stopper 2 is small, the rubber stopper 2 removed from the hook hole 3 may be lost.

Since the lid 2A is exposed from the hook hole 3, the lid 2A is easily damaged by a vehicle or the like.

When a pressing force is locally applied to the lid 2A, the rubber plug 2 may be buried in the hook hole 3 and fall into the manhole.

Therefore, an object of the present invention is to remove the iron cover from the iron cover when opening the iron cover, and there is no risk of damage by a car or the like. An object of the present invention is to provide a hook for a hook of an iron lid, which can minimize intrusion.

[0009]

According to the present invention, there is provided a plug for closing a hook hole formed in an iron lid, comprising: a closing plate made of an elastic material for closing the hook hole; It comprises a fixing bracket for fixing to the hook, and the closing plate enables insertion of a hand hook into the hook .
A slit having a circular opening is formed at the end portion in a cross shape, and the fixing bracket is detachably attached to the iron lid.

[0010]

[Function] By forming a cross-shaped slit in a closing plate made of an elastic material, a hook can be inserted,
After the hook is pulled out, the hook can be returned to the original state and the hook can be closed.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing an embodiment of an iron cover hook hole plug according to the present invention.

FIG. 1 is a perspective view showing a hook hole plug of the present invention mounted on an iron cover, FIG. 2 is a cross-sectional view showing the hook hole plug of the present invention mounted on an iron cover, and FIG. FIG. 4 is a perspective view showing a mounting bracket and a closing plate for attaching the closing plate to the back surface of the hook hole, and FIG.
Is a perspective view showing a fixing bracket provided on the back surface of the iron lid for fixing the mounting bracket, and FIG.
FIG. 7 is a cross-sectional view showing a hook plug according to the present invention, FIG. 7 is a cross-sectional view showing a state where a hand hook inserted into the hook plug according to the present invention is pulled up, and FIG. 8 is a hand inserted into the hook plug according to the present invention. It is sectional drawing which shows the state in which the lock of the iron lid was released by the hook.

In FIG. 1 to FIG. 8, reference numeral 4 denotes a closing plate made of an elastic material such as rubber for closing a hook hole 3 formed in the iron cover 1. As shown in FIGS. 1 and 4, slits 5 are formed in the closing plate 4 in a cross shape. At the end of the slit 5, a circular opening 5A is formed.
Have been. By forming the opening 5A, the hook 7
It is possible to prevent the closing plate 4 from being broken by insertion. Except when the iron lid 1 is opened and closed, the closing plate 4 remains closed due to its elasticity, so that rainwater and dust hardly enter the manhole. Reference numeral 6 denotes a mounting bracket for mounting the closing plate 4 on the back surface of the hook hole 3. As shown in FIG. 4, the mounting bracket 6 is formed of a plate material having an opening 8 into which a hook 7 is inserted, and a bent piece 10 having a bolt hole 9 formed on both sides of the opening 8. The closing plate 4 is attached to the upper surface of the opening 8.

Numeral 11 denotes a fixing bracket for inserting the mounting bracket 6 into the groove 21 of the iron cover and fixing it with the bolts 12, as shown in FIG. 1 is provided on the back surface. An engaging portion 16 for suspending the bolt hole 13 of the bolt 12 and the weight 14 is formed in the fixing member 7. The weight 14 has a shape as shown in FIG.
The hook 18 is rotatably inserted into the locking portion 16 of the fixing bracket 11, and the hook 18 formed on the receiving frame 17 side of the weight 14 into which the iron cover 1 is fitted is engaged with the projection 19 formed on the inner side of the receiving frame 17. Engage. The distal end of the hook 7 is formed in a T-shape by forming protruding pieces 20 on both sides of the distal end, and the width of the distal end is longer than the width of the hook hole 3. Therefore, the iron cover 1 can be pulled up by hooking the protruding piece 20 on the hook hole 3.

In order to attach the hook hole stopper of the present invention to the iron lid 1, as shown in FIG.
With an adhesive or the like. Then, the mounting bracket 6 to which the closing plate 4 is stuck is attached to the bolt 12
Is fixed to the fixing bracket 11 by the following procedure. Thereby, the hook 3 is closed by the closing plate 4.

When the iron cover 1 is opened, the tip of the hook 7 is inserted into the hook hole 3 as shown in FIG. At this time,
The closing plate 4 is made of an elastic material such as rubber and has a slit 5 so that the tip of the hook 7 can be inserted into the hook 3 without any resistance, and the weight 1
4 is guided to the intersection of the slits 5 which is the optimum position for rotating. Next, as shown in FIG.
After being rotated by 0 °, it is pulled up in the direction of arrow A in FIG. As a result, the projection 20 of the hook 7 hits the upper end of the weight 14, and the weight 14 rotates in the direction of arrow B in FIG. Further, when the hook 7 is pulled up, as shown in FIG.
The hook 18 of the weight 14 is completely disengaged from the projection 19 of the receiving frame 17, and the locking of the iron cover 1 is released. During this time, hook 7
Moves along the longitudinal direction of the hook 3, but this movement is performed without any trouble because the slit 5 is formed in the closing plate 4. If the hook 7 is further pulled up in this state, the iron lid 1 can be opened.

[0017]

As described above, according to the hook stopper of the present invention, the following useful effects can be obtained.
Since the closing plate is always attached to the iron lid, there is no risk of loss. Since the closing plate is not exposed from the surface of the iron lid, there is no risk of damage due to a vehicle or the like. Since the closing plate is made of elastic rubber or the like, even if a slit for inserting a hook is formed, it is possible to minimize the infiltration of rainwater and dust into the manhole.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a hook plug according to the present invention mounted on an iron lid.

FIG. 2 is a cross-sectional view showing the hook plug according to the present invention mounted on an iron lid.

FIG. 3 is a perspective view of a weight attached to an iron lid.

FIG. 4 is a perspective view showing a mounting bracket and a closing plate for attaching the closing plate to the back surface of the hook hole.

FIG. 5 is a perspective view showing a fixing bracket provided on the back surface of the iron cover for fixing the mounting bracket.

FIG. 6 is a cross-sectional view showing the hook plug according to the present invention into which a hook is inserted.

FIG. 7 is a cross-sectional view showing a state where a hand hook inserted into the hook plug according to the present invention is pulled up.

FIG. 8 is a cross-sectional view showing a state in which the lock of the iron cover is released by a hook inserted into the hook plug according to the present invention.

FIG. 9 is a sectional view of an iron cover showing a conventional technique.

[Explanation of symbols]

 1: Iron lid 2: Rubber stopper 3: Hook 4: Closure plate 5: Slit 5A: Opening 6: Mounting bracket 7: Hand hook 8: Opening 9: Bolt hole 10: Bend piece 11: Fixing bracket 12: Bolt 13 : Bolt hole 14: Weight 15: Shaft 16: Locking part 17: Receiving frame 18: Hook 19: Projection 20: Projection 21: Groove

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-7-158399 (JP, A) JP-A-58-1885639 (JP, U) JP-A-57-123851 (JP, U) JP-A-2 26643 (JP, U) Japanese Utility Model Hei 5-33058 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02D 29/14 E05B 65/00

Claims (1)

(57) [Claims] 1. A plug for closing a hook hole formed in an iron cover, comprising: a closing plate made of an elastic material for closing the hook hole; and a stopper plate for fixing the closing plate to the hook hole. The closure plate has a circular opening at the end, which allows insertion of a hand hook into the hook hole.
That slits are formed in the cross shape, the fixing bracket is characterized in that it is detachably attached to the iron cover,鉤孔for plug Tetsufuta.