JPH072715Y2 - Closure device for opening of lid for underground structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a device for closing an opening of a lid for an underground structure.

(Prior Art) A lid for an underground structure such as a manhole iron lid is provided with an opening for using a tool such as a crowbar or a hook when opening the lid, from which water or mud or sand is used. Since it invades inside, measures have been taken to prevent this (Jitsuko Sho-58-388).
No. 8, No. 58-3892, No. 59-17973, etc.).

However, conventionally, since the member for closing the opening is made of iron, the movement thereof is slow, and there is a problem that the operation is more likely to occur due to corrosion. In addition, the conventional one cannot completely prevent the ingress of water and earth and sand, and it intrudes little by little through the gap,
The dirt inside progresses gradually.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned problems and drawbacks. The problem is that the device for closing a lid for an underground structure is provided with a soil removal from the opening of the lid. Effectively prevent intrusion,
It is to facilitate the manufacturing without impairing the workability during the lid opening operation.

(Means for Solving the Problem) In order to solve the above problem, the present invention has an opening for inserting the lid opening tool 2 in a peripheral portion of a lid 1 and has a size for closing the opening. Then, the closing plate 4 that is pushed inward by the opening tool inserted from the opening and opens inward is formed of rubber or synthetic resin so as to be elastically deformable, and the movable end 4c at the tip of the closing plate in the closed state has the frame body. A means for fitting the inner end of the closing plate 4 into the mounting groove 11 provided outward on the lower surface of the lid so as to close the opening by contacting the inner circumference of the opening 5 or the opening end 3a. It was taken. Furthermore, a hook member 7 that engages with an engaging portion 6 that is provided inside the frame 5 that receives the lid is pivotally supported on the lid near the closing plate, and when the closing plate is pushed, Connecting means 8 for contacting and releasing the engagement
Is provided between the hook member 7 and the closing plate 4, workability at the time of opening the lid can be significantly improved.

(Embodiment) Explaining in more detail below with reference to an embodiment shown in the drawings, each of the drawings relates to a circularly formed iron lid made of ductile cast iron, and the lid 1 has a so-called burl hole as an opening 3 at the periphery. The opening 3 penetrates the hanging edge 9 of the lid. Reference numeral 10 denotes a hooking portion formed on the inside of the opening 3 on the back surface of the lid, and hooks the tip portion 2a of the lid opening tool 2. The opening 3 may be a U-shaped cutout.

The closing plate 4 is mounted by fitting the base end into a mounting groove 11 provided in a portion located radially inward of the lid 1 from the opening end 3a, and the mounting groove 11 is radially outward. Heading for. The distance from the mounting groove 11 to the inner periphery of the frame 5 when the lid 1 is closed and the length from the inner end to the outer end of the closing plate 4 are set to be substantially equal (Fig. 1, (See FIG. 2).
Further, the length (width) of the closing plate 4 in the circumferential direction of the lid is set so as to exceed the opening width of the opening 3 (see FIGS. 3 and 4). Therefore, the sharp movable end 4c at the tip of the closing plate 4 is not connected to the opening 3
It enters into the inside and completely closes the opening 3 with the frame 5.

The closing plate 4 has a composite structure consisting of a main plate 4a which is itself made of rubber or synthetic resin, and a metal spring plate 4b which is integrated with the main plate 4a by insert molding, and the main plate 4a has an opening 3
The spring plate 4b elastically comes into contact with the contacting part with to improve the airtightness and prevents the spring plate 4b from rusting. However, depending on the size and the structure of the part to be used, the spring plate 4b may be omitted, and the main plate 4a alone can sufficiently achieve the intended purpose.

A pair of support pieces 12 are provided on both sides of the opening 3 substantially parallel to each other, and the support shaft 14 is pivotally supported by the receiving groove 13 provided on the opposing surface thereof, whereby the hook member 7 can be swung in the radial direction. Is attached to the lid 1. Since the upper surface 6a is inclined downward, the hook member 7 is automatically locked when the lid is closed.

In the embodiment, the closing plate 4 that closes the opening 3 is located between the support shafts 14, 14 of the hook member 7, and the upper part of the hook member that allows the closing plate 4 to pass through is formed with a concave stepped portion 8b. Has become. The engaging side 8a of the closing plate engages with this to form the connecting means 8,
By the operation of pushing down the closing plate 4, the engagement between the hook member 7 and the engaging portion 6 of the frame body 5 is released.

Another embodiment of the closing plate 4 is shown in FIG.

First, in the example shown in FIG. 5, the plate shown in FIG. 1 has a flat plate shape. In this example, 3a is closed. The positional relationship between the closing plate 4 and the hook member 7 is as described above, but the stepped portion 8a is changed in inclination so as to be suitable for a substantially L-shaped closing plate shape.

The example of FIG. 7 is an example in which the tip end 4e of the flat plate-shaped closing plate 4 is formed in a sharp shape, and an engaging side 8a that is in contact with the opening edge 3a and presses down the stepped portion 8b of the hook member 7 is provided on the lower surface. Yes, the opening 3 is doubly closed. The mounting groove 11 of the closing plate 4 may be fixed as a through hole with a screw 15 so that the entrance / exit can be adjusted. Note that the other configurations may be the same as those in the case of FIG. 1, so the reference numerals are used and the description is omitted.

(Operation) In the above configuration, when the lid body 1 is fitted and closed on the frame body 5,
Since the closing plate 4 closes the opening 3, it is completely sealed for underground structures. The closing plate 4 has a main plate 4a made of rubber or synthetic resin as an outer layer. Since this is a relatively soft material that can be elastically deformed, it is elastically brought into contact with the wall surface of the opening 3 or the opening end 3a to enhance the sealing property. ing.

When opening the lid 1, as shown in FIG. 2 or FIG. 6 and FIG. 8, the lid opening tool 2 is pushed into the back of the lid from the opening 3,
The tip portion 2a is hooked on the hooking portion 10, and the back surface of the tool is pryed open with the abutting portion of the frame 5 as a fulcrum. At that time, the closing plate 4 closing the opening 3 is elastically deformed. The blocking plate 4 pushed down by the lid opening tool 2 hits the stepped portion 8b of the hook member 7 at the engaging side 8a without disturbing the use of the lid opening tool 2.
Since the hook member 7 is pivoted inward to separate from the frame body 5 and the lock is released, the lid opening operation is extremely easy.

Although dirt and dust can collect on the closing plate 4, it does not enter the inside of the opening 3 and the collected dirt and the like can be easily removed when the lid is opened.

(Effect) Therefore, according to the present invention, since the opening 3 provided in the lid 1 can be closed by the elastically deformable closing plate 4, the intrusion of earth and sand into the interior of the underground structure can be effectively performed. Even when the opening tool 2 is inserted through the opening 3, it can be easily pushed open by the tip of the opening tool, so that operability is not impaired at all, and the inner end of the closing plate 4 is covered. By fitting into the mounting groove 11 on the lower surface of the body, the movable end 4c at the tip of the closing plate comes into contact with the inner circumference or the opening end 3a of the frame body 5 in the closed state, so that the mounting is very easy and at the same time the earth and sand are attached. The intrusion prevention effect is also perfect, and the structure is simple, so that it is lightweight and easy to manufacture, and it is not prone to malfunctions due to corrosion and the like.

[Brief description of drawings]

The drawings relate to an opening closing device for a lid for an underground structure according to the present invention. FIG. 1 is a sectional view of the first embodiment when the lid is closed, and FIG. 2 is a sectional view of the lid during an opening operation, FIG. 3 is a front view of a portion of the device of the present invention, FIG. 4 is a plan view, FIG. 5 is a cross-sectional view when the second embodiment is closed, FIG. 6 is a cross-sectional view during opening operation, and FIG. 3 is a sectional view when the lid is closed, and FIG. 8 is a sectional view during the lid opening operation. 1 ... Lid body, 2 ... Lid opening tool, 3 ... Opening portion, 4 ... Closure plate, 5 ... Frame body, 6 ... Engaging portion, 7 ... Hook member, 8 ...
… Means of connection.

Claims (5)

[Scope of utility model registration request] 1. An opening 3 for inserting a lid opening tool 2 is formed in a peripheral edge portion of a lid 1, and has a size to close the opening.
The closing plate 4 pushed inward by the opening tool inserted from the opening and opened inward is made of rubber or synthetic resin so as to be elastically deformable, and in the closed state, the movable end 4c at the tip of the closing plate has the frame 5 The inner end of the closing plate 4 is fitted into a mounting groove 11 provided outward on the lower surface of the lid so as to close the opening by abutting on the inner circumference or the opening end 3a. A device for closing the opening of a lid for an underground structure. 2. An opening portion 3 for inserting a lid opening tool 2 is formed in a peripheral portion of a lid body 1 and has a size to close the opening portion.
The closing plate 4 pushed inward by the opening tool inserted from the opening and opened inward is made of rubber or synthetic resin so as to be elastically deformable, and in the closed state, the movable end 4c at the tip of the closing plate has the frame 5 The inner end of the closing plate 4 is fitted into the mounting groove 11 provided outward on the lower surface of the lid so as to close the opening by contacting the inner circumference or the opening end 3a of the frame body. A hook member 7 that engages with an engaging portion 6 projecting inside 5 is pivotally supported by a lid near the closing plate, and when the closing plate is pushed, it contacts with it to release the engagement. An opening closing device for an underground structure lid in which a connecting means 8 is provided between the hook member 7 and the closing plate 4. 3. The underground structure according to claim 1, wherein the closing plate 4 is a composite of a main plate 4a made of rubber or synthetic resin, and a metal spring plate 4b integrally formed with the main plate 4a. A device for closing an opening of a lid for an article. 4. The underground structure according to claim 1, wherein the closing plate 4 has its movable end 4c inserted into the opening 3 and abuts on the inner circumference of the frame 5 when the cover is closed. A device for closing the opening of the lid. 5. The connecting means 8 comprises an engaging side 8a of the closing plate 4 and a stepped portion 8b formed on the hook member 7 so as to be engaged with the engaging side 8a. A device for closing the opening of the lid for underground structures.