JP2866318B2 - Hand hook insertion hole stopper of iron lid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can prevent rainwater and dust from entering a manhole from a hand hook insertion hole, particularly from a hand hook insertion hole of an iron cover. And the hook of the locking mechanism attached to the iron lid can be securely held at the position of engagement with the projection of the receiving frame. The present invention relates to a stopper for a hand hook insertion hole of an iron lid.

[0002]

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

The rubber stopper 2 has a lid 2A having an area larger than the diameter of the hook insertion hole 3 and a foot 2B formed at a lower portion of the lid 2A and having a width larger than the opening width of the hook insertion hole 3.
It consists of Foot 2 inserted into hook insertion hole 3
B spreads by the elastic force after passing through the hook insertion hole 3 and prevents the rubber stopper 2 from coming off.

[0004]

However, the above-mentioned prior art can prevent rainwater, dust and the like from entering the manhole through the hook insertion hole, but has the following problems. Was. In order to fit the rubber plug 2 into the hand hook insertion hole 3, the distance between the feet 2B is narrowed by hand or the like and pushed into the hand hook insertion hole 3, while the rubber plug 2 is inserted into the hand hook insertion hole 3. In order to remove the rubber plug 2, it was necessary to pry open the rubber stopper 2 with a screwdriver or the like. Therefore, the rubber plug 2 could not be easily attached and detached. Since the lid 2A was exposed from the hook insertion hole 3, the lid 2A was easily damaged by a car or the like. Since the lid 2A is exposed from the hook insertion hole 3, when a pressing force is locally applied to the lid 2A, the rubber plug 2 may be buried in the hook insertion hole 3 and fall into the manhole. Was.

Accordingly, it is an object of the present invention not only to prevent rainwater, dust and the like from entering the manhole through the hook insertion hole, but also to prevent the manhole from being damaged or falling into the manhole. Furthermore, if the hook is inserted into the hook insertion hole, the hook of the locking mechanism attached to the iron lid can be reliably made to stand by at the engaging position with the projection of the receiving frame. It is an object of the present invention to provide a stopper for a hand hook insertion hole of an iron lid.

[0006]

Means for Solving the Problems The present invention is a plug made of an elastic material for closing a hook insertion hole formed in an iron lid, wherein the stopper main body is inserted into the hook insertion hole, A bolt, which is inserted into the plug body and is sufficiently longer than the length of the plug body, and a nut for preventing the bolt from being pulled out and screwed to the bolt, wherein the nut holds the bolt inside the plug body. When the bolt is pulled out of the plug body, the head of the bolt is screwed into a position protruding from the upper surface of the plug body.

Another feature of the present invention is that a neck portion is formed on an upper side surface of the plug body so as to be engaged with a ridge formed at a lower end of the hook insertion hole, and the neck portion and upper surfaces of the plug body are formed. Is such that the upper surface of the plug main body does not protrude from the hook insertion hole when the ridge and the neck are engaged.

[0008]

The plug body can be prevented from being exposed from the hand hook insertion hole by fitting the entire plug body into the hand hook insertion hole. Therefore, it is possible to prevent the stopper main body from being damaged by a vehicle or the like, or from falling into the manhole. In addition, by passing a bolt longer than the length of the plug body through the plug body, the plug body is fitted into the hook insertion hole so that the lower end of the bolt is brought into contact with the hook of the locking mechanism attached to the iron lid. be able to. Therefore, the hook can be reliably kept at the engagement position with the projection of the receiving frame.

[0009]

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

FIG. 1 is a perspective view showing a plug for a hook for inserting a hook of an iron cover according to the present invention, and FIG. 2 is a cross-sectional view showing a plug for a hook for inserting a hook of the present invention fitted into the hook insertion hole of the iron lid. FIG. 3
FIG. 4 is a cross-sectional view taken along the line AA of FIG. 2, and FIG. 4 is a cross-sectional view showing the hand hook insertion hole plug of the present invention fitted in the hand hook insertion hole of the iron cover to which the locking hook is attached. Is a sectional view showing a state in which the iron cover is opened by a hook, and FIG. 6 is a perspective view showing a locking hook attached to the iron cover.

1 to 6, reference numeral 4 denotes a plug body made of an elastic material such as rubber, which is inserted into a hook insertion hole 6 formed in the iron cover 5. The entire stopper body 4 is formed in a tapered shape so that it can be easily inserted into the hook insertion hole 6, a concave portion 4 </ b> A into which a head of a bolt described later is inserted is formed on an upper surface, and a hand A neck 4B is formed at the lower end of the hook insertion hole 6 so as to engage with a ridge 6A. Neck 4
B and the upper surface of the plug main body 4 have a ridge 6 and a neck 4B.
The upper surface of the plug main body 4 has a length that does not protrude from the hook insertion hole 6 when is engaged. The hook insertion hole 6 is formed in a reverse tapered shape in order to improve the close contact with the plug main body 4 when the plug main body 4 is fitted therein.

The hole formed in the plug body 4 through which the bolt is inserted is preferably formed in a tapered shape so that rainwater or the like does not easily enter. The plug body 4 is inserted into the hand hook insertion hole 6 by pulling the head of the bolt with pliers or the like.
Although it is pulled out from the inside, the size of the recessed portion 4A is given some allowance so that the head of the bolt can be easily pinched by pliers or the like.

Reference numeral 7 denotes a bolt passed through the plug body 4. The bolt 5 is longer than the length of the plug body 4, and has a length that abuts on a hook described later when the plug body 4 is fitted into the hand hook insertion hole 6. A nut 8 is screwed into the bolt 5, and the plug body 4 can be pulled out from the hook insertion hole 6 by pulling the bolt 5.

Locking hook 9 attached to iron cover 5
Is a pin 9A pivotally supported by the iron lid 5, as shown in FIG.
, A weight 9B, a hook 9C that engages with the projection 11A of the receiving frame 11, and an engagement portion 9D with which the projection 10A of the hand hook 10 engages. The hook 9 pivotally supported by the iron lid 5 by the pin 9A engages the projection 10A of the hand hook 10 with the engaging portion 9.
When the hook 10 is pulled up by engaging with the hook D, the pin 10A rotates about the pin 9A.
Is released, and the iron cover 5 can be opened. On the other hand, when the iron cover 5 is fitted into the receiving frame 11, the hook portion 9 </ b> C is brought into contact with the projection 1 of the receiving frame 11 by the weight of the weight portion 9 </ b> B.
It naturally rotates to the position of engagement with 1A and is locked.

Since the present invention is configured as described above, if the plug body 4 is fitted into the hook insertion hole 6, the bolt 5 comes into contact with the upper surface of the weight 9B of the hook 9 as shown in FIG. . Therefore, even if the hook 9 is not rotated to the locking position due to its own weight for some reason, the hook 9 can be forcibly rotated to the locking position. Further, the lock is not released by the rotation of the hook 9 due to the vibration. In order to fit the stopper body 4 into the hook insertion hole 6, the lower part of the stopper body 4 may be inserted into the hook insertion hole 6 and then pushed in with a foot or the like.

On the other hand, when opening the iron cover 5, the bolt 5
May be pulled with pliers or the like. The bolt 5 is prevented from coming out of the plug body 4 by the nut 8, so that the plug body 4 comes out of the hand hook insertion hole 6 together with the bolt 5.

[0017]

As described above, according to the plug for a hand hook insertion hole of the present invention, the following useful effects can be obtained. By allowing the entire plug body to be fitted into the hand hook insertion hole, the plug body can be prevented from being exposed from the hand hook insertion hole. Therefore, it is possible to prevent the stopper main body from being damaged by a vehicle or the like, or from falling into the manhole. By passing a bolt longer than the length of the stopper body through the stopper body, the stopper body can be easily extracted from the hook insertion hole, and the lower end of the bolt can be ironed by fitting the stopper body into the hook insertion hole. It can be made to hit the hook of the locking mechanism attached to the lid. Therefore, the hook can be reliably kept at the engagement position with the projection of the receiving frame.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a plug for a hand hook insertion hole of an iron cover according to the present invention.

FIG. 2 is a cross-sectional view showing a hand hook insertion hole plug of the present invention fitted into a hand hook insertion hole of an iron lid.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a cross-sectional view showing a hand hook insertion hole plug of the present invention fitted into a hand hook insertion hole of an iron cover to which a locking hook is attached.

FIG. 5 is a cross-sectional view showing a state where an iron lid is opened by a hook.

FIG. 6 is a perspective view showing a locking hook attached to an iron cover.

FIG. 7 is a sectional view showing a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Iron lid, 2 Rubber stopper, 2A lid part 2B Foot 3 Hand hook insertion hole 4 Plug body 4A Depression 4B Neck 5 Iron lid 6 Hand hook insertion hole 6A Ridge 7 Bolt 8 Nut 9 Hook 9A Pin 9B Weight 9C Hook part 9D Engagement part 10 Hand hook 10A Projection 11 Receiving frame 11A Ridge

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E02D 29/14

Claims (2)

(57) [Claims] 1. A plug made of an elastic material for closing a hook insertion hole formed in an iron lid, comprising: a plug body inserted into the hook insertion hole; and a plug body inserted into the plug body. A bolt sufficiently longer than the stopper body length, and screwed to the bolt;
A nut for preventing the bolt from coming off, wherein the nut is screwed into a position where the head of the bolt projects from the upper surface of the plug main body when the bolt is pulled out from the plug main body. A plug for a hand hook insertion hole of an iron lid, characterized in that: 2. A neck portion is formed on an upper side surface of the plug main body to engage with a ridge formed at a lower end of the hook insertion hole, and a length between the neck portion and an upper surface of the plug main body is formed. The hand of the iron lid according to claim 1, wherein when the ridge and the neck are engaged, the upper surface of the plug body does not protrude from the hook insertion hole. Plug for hook insertion hole.