JPH09328810A - Opening and closing type pit cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to assemble a holding frame to a cover main body without making any gap in an openable manner and to promote assembly efficiency. SOLUTION: One end of a hinge pipe 21 on cover main body 2 side is inserted aslant in a fixed pin 10 of a holding frame 1, and then, once a coming in and out pin 24 projected to the other end of the hinge pipe 21 is made to come in against force of a spring 23, and when the other end of the hinge pipe 21 is fitted into the holding frame 1 to coincide with a pin-hole 11, the coming in and out pin 24 is projected with force of the spring 23 and is inserted into the pin-hole 11. Insertion work of both ends of the hinge pipe 21 into the fixed pin 10 and pin-hole 11 can be easily made even if there is no gap between the holding frame 1 and cover main body 2 and even if there is no working hole. The end plate of the cover main body 2 is connected to the hinge pipe 21 with U-shaped joint rings 22 in a turnable manner to make it possible to open the cover main body 2 at 180 deg.C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an openable cover for a drainage hole for collecting and draining.

[0002]

2. Description of the Related Art As an openable lid of this type, a grid-shaped lid body (grating) that has been assembled to the receiving frame in advance is taken to the installation site and installed in a hole with concrete. There is a method of first fixing only the receiving frame to the hole with concrete and then assembling the lid main body to the receiving frame. According to the latter method, the fixing work with concrete is only the receiving frame Work can be done easily. The present invention is intended for this latter type, but as the prior art relating to this type of lid,
There is one as shown in FIGS. 8 and 9 (for example, Japanese Utility Model Publication No. 60-42140). This is because after fixing the receiving frame 1 with the anchor 9 to the hole 3 with concrete 4, the lid main body 2 is 180 degrees through the left and right hinge plates 31,
It is assembled so that it can be opened and rotated. The reason why the lid is opened and closed is to remove dust and mud accumulated in the holes.

[0003]

However, in the above-mentioned conventional example, since the hinge plate 31 is arranged between the receiving frame 1 and the lid main body 2, the receiving frame 1 is formed by the thickness of the hinge plate 31. A gap G is formed between the lid body 2 and the lid body 2.
In particular, in the case of a fine lid to be installed on the sidewalk, the gap g between the main bars 19 of the lid main body 2 is usually set to about 9.5 to 10.5 mm so that the heel of the high heel does not get caught. The gap G formed by the hinge plate 31 becomes wider than that. For this reason,
There is a risk that the heels of high heels may get caught in the gap G, and if there is such a gap G, the whole lid becomes disproportionate in appearance and unsightly.

Further, when the lid body 2 is attached to the hinge plate 31, it is necessary to insert the turning pin 32 into the hinge plate 31 from the inside of the lid body 2, but in order to facilitate the insertion work, the lid body 2 A working hole 33 of 30 to 40 mm square is opened on the side. After inserting the turning pin 32, the working hole 33 is closed with a rubber or plastic cover, but this cover is easily peeled off, and if it is peeled off, there is a risk that the heel of the high heel will also get caught. The appearance was also bad. Further, after inserting the turning pin 32, in order to prevent the pin 32 from coming off, the split pin 3
4 is inserted into the hole 35 of the hinge plate 31 and the hole 36 of the turning pin 32.
5 and the hole 36 of the turning pin 32 were not easily aligned, which made the mounting work very difficult.

Therefore, the present invention improves the safety of walking and the appearance by improving the hinge portion of the openable and closable lid without making a gap between the receiving frame and the lid body. It is also an object of the present invention to provide an openable and closable lid in which a lid body can be pivotally attached to a receiving frame easily and freely without opening a working hole in the lid body.

[0006]

According to the present invention, a rectangular grid-shaped lid main body is fitted in a rectangular receiving frame composed of front and rear frames and left and right frames, and is provided on the side of the base of rotation of the lid main body. In an openable and closable lid pivotably pivoted upward around the hinge part, the hinge part is adjacent to the end plate on the base end side of the lid main body, which is parallel to the end plate. Has a hinge pipe arranged in a gap between the front and rear frames, and one end of the hinge pipe is rotatably attached to a fixing pin projecting from an inner surface of the left or right frame which is closely opposed to the hinge pipe. , And the other end of the hinge pipe has a retractable pin that is urged axially outward by a spring in the hinge pipe, and the tip of the retractable pin closely opposes the other end of the hinge pipe. Insert into the pin receiving hole on the right or left frame of the receiving frame There Te, drilled connecting holes in the end plate, through the arcuate portion of the U-shaped connecting ring to the connecting hole to involve above the coupling hole of the end plate,
Both ends of the U-shaped connecting ring are fixed to the hinge pipe.

[0007]

When the lid body is pivotally attached to the receiving frame, one end of the hinge pipe on the lid body side is obliquely inserted into the fixing pin of the receiving frame, and then the protruding / retracting pin protruding to the other end of the hinge pipe is temporarily inserted. After inserting the hinge pipe into the receiving frame so that it fits into the pin receiving hole, the protruding and retracting pins will be projected by the spring force and inserted into the pin receiving hole. To do. The insertion work of both ends of the hinge pipe into the fixing pin and the pin receiving hole can be performed even if there is almost no gap between the receiving frame and the lid main body, or even if there is no working hole.

According to the U-shaped connecting ring which connects the end plate of the lid body and the hinge pipe, when the lid body is lifted up to about 90 degrees from the closed state, only the lid body is U-shaped.
The lid body pivots upward along the arc portion of the letter-shaped connecting ring, and thereafter, the lid main body together with the hinge pipe pivots up to 180 degrees with the left and right fixing pins and retractable pins as pivot points.

[0009]

1 is a plan view of the whole opening / closing type lid according to the present invention, FIG. 2 is a side view thereof, FIG. 3 is an enlarged plan view of portion A in FIG. 1, and FIG. -B line sectional view, FIG. 5 is a sectional view taken along line CC of FIG. 6, FIG. 6 is a sectional view showing the hinge portion in a half-opened state corresponding to FIG. 5, and FIG. 7 is a fully opened state corresponding to FIG. It is sectional drawing which shows a hinge part.
In FIG. 1 and FIG. 2, 1 is a receiving frame, 2 is a grid-shaped lid body, 3 is a square hole, and after fixing the receiving frame 1 to the round hole 3 with concrete 4, the receiving frame 1 is covered with the lid body 2 Is assembled around the hinge portion H so as to be opened upward and rotatable.

The receiving frame 1 is formed by frame welding the front and rear frames 5 and 6 made of L-shaped steel and the left and right frames 7 and 8 made of flat steel in a square shape. Anchors 9 are welded to the outside of the front and rear frames 5 and 6. Etc. are stuck. A fixing pin 10 is fixed to one of the left frame 7 and the right frame 8 (right frame 8 in the illustrated example) near the front end by welding or the like so as to project inward, and the other (left frame 7 in the illustrated example). An inwardly-opened pin receiving hole 11 is provided at a portion near the front end so as to face the fixed pin 10 coaxially. As shown in FIGS. 3 and 4, the pin receiving hole 11 is composed of a hole 12 penetrating the left frame 7 itself and a blind hole 14 of the cap nut 13 welded to the outside thereof. The outside of the pin receiving hole 11 is covered with the cap nut 13 in order to prevent the concrete 4 from entering the pin receiving hole 11.

On the other hand, the lid main body 2 frame the front, rear, left and right end plates 15, 16, 17, 18 in a quadrangular shape, and the main bar 1 is provided between the front and rear end plates 15, 16.
The crossbar 20 is fitted between the left and right end plates 17 and 18 and assembled and welded in a lattice shape. A hinge pipe 21 having the same length as the end plate 15 is connected to the front end of the front end plate 15 in parallel with a U-shaped connecting ring 22.

The hinge pipe 21 has an inner diameter larger than the diameter of the fixed pin 10 because one end of the hinge pipe 21 is loosely fitted in the fixed pin 10 of the receiving frame 1. As shown in FIGS. 3 and 5, a spring 23 and a retractable pin 24 that can be inserted into the pin receiving hole 11 are sequentially inserted into the other end of the hinge pipe 21, and the retractable pin 24 is retracted by the force of the spring 23. A spring stopper pin 25 is inserted and fixed to the hinge pipe 21 in an orthogonal manner so that the tip of the protrusion 24 projects to the outside of the hinge pipe 21.

As shown in FIGS. 4 and 5, the front end plate 15 and the hinge pipe 21 are connected to the end plate 1.
While the upper and lower cutouts 26 and the connecting holes 27 are provided on the left end portion and the right end portion of 5 respectively on the left and right, respectively,
The U-shaped connecting ring 22 is provided in each connecting hole 27 to the end plate 15.
The upper portion 15a of the U-shaped connecting ring 22 is fixed to the hinge pipe 21 by welding or the like, while the upper portion 15a is inserted through the connecting hole 27 of FIG. The outer dimension of the entire lid body 2 including the hinge pipe 21 is set as close as possible to the inner dimension of the receiving frame 1. Therefore, the left and right ends of the hinge pipe 21 and the left and right end plates 17 and 18 of the lid body 2 closely face the inner surfaces of the left and right frames 7 and 8 of the receiving frame 1, and the hinge pipe 21 is the front frame of the receiving frame 1. On the inner surface of 5, the end plate 16 after the lid body 2 closely faces the inner surface of the rear frame 6 of the receiving frame 1. That is, there is almost no gap between the inner circumference of the receiving frame 1 and the outer circumference of the lid body 2. The fixed pin 10 and the pin receiving hole 11 of the receiving frame 1, the hinge pipe 21 and the retractable pin 24 of the lid body 2 constitute a hinge portion H. A handle 28 is attached to a rear portion of the lid main body 2 from the center in the front-rear direction so that the handle 28 can be pulled out upward.

Next, the procedure for assembling the lid main body 2 to the receiving frame 1 will be described. First, the receiving frame 1 is fixed in the hole 3 with concrete 4, and then the lid main body 2 is assembled to the receiving frame 1. At that time, first, the fixing pin 10 of the receiving frame 1 is attached to the hinge on the lid main body 1 side. Insert one end of the pipe 21 obliquely. Next, the retractable pin 24 protruding to the other end of the hinge pipe 21 is once retracted against the force of the spring 23, and then the other end of the hinge pipe 21 is fitted into the receiving frame 1 to receive the pin receiving hole 11 To match. Then
The tip of the retractable pin 24 is projected by the force of the spring 23 and inserted into the pin receiving hole 11. Accordingly, the lid main body 2 is assembled to the receiving frame 1 so as to be able to open and rotate upward with the fixed pin 10 and the retractable pin 24 as the fulcrum of rotation.

When the handle 28 is gripped from this closed state and the rear end side of the lid main body 2 is lifted forward, the connecting hole 27 of the end plate 15 on the front side of the lid main body 2 is below the circular arc portion 22a of the U-shaped connecting ring 22. When the lid body 2 is moved upwards and the lid body 2 is opened in a vertical posture in which the end plate 15 is substantially horizontal (see FIG. 6), when the lid body 2 is further tilted forward, the end plate 15
The upper portion 15a of the connecting hole 27 engages with the inner circumference of the circular arc portion 22a of the U-shaped connecting ring 22. Through this engaging action, the hinge pipe 21 is slightly pulled up by the end plate 15 and the fixing pin 10 and the retractable pin It is rotated about 90 degrees with 24 as a fulcrum. Therefore, the lid body 2 can be opened up to 180 degrees (see FIG. 7). The lid body 2 is 180
By opening it once, cleaning work for the hole 3 can be easily performed.

In the above-described embodiment, the lid body 2 is once fixed to the receiving frame 1.
After being assembled, the retractable pin 24 is pressed and biased by the spring 23 so as not to come out of the pin receiving hole 11, so that the lid body 2 is not separated from the receiving frame 1 and the integral inseparable state is maintained. It

[0017]

According to the present invention, the lid main body can be assembled to the receiving frame so as to be openable and closable with little space between them, and it is not necessary to open a conventional working hole for attaching a hinge. Even if it is installed on the sidewalk, it can walk safely and can be finished in good appearance. In addition, the lid body can be easily assembled to the receiving frame, and the workability of assembly is excellent.

[Brief description of drawings]

FIG. 1 is a plan view of an entire retractable lid according to an embodiment of the present invention.

FIG. 2 is a side view of the entire opening / closing type lid.

FIG. 3 is an enlarged plan view of part A in FIG.

FIG. 4 is a sectional view taken along line BB in FIG.

FIG. 5 is a sectional view taken along line CC in FIG. 3;

FIG. 6 is a cross-sectional view showing the hinge portion in a half-opened state corresponding to FIG.

FIG. 7 is a cross-sectional view showing the hinge portion in a fully opened state corresponding to FIG.

FIG. 8 is a plan view of an opening / closing type lid according to a conventional example.

FIG. 9 is a side view showing the lid shown in FIG. 8 with a part thereof cut away.

[Explanation of symbols]

 1 Receiving frame 2 Lid body 3 Masu hole 4 Concrete 5 Front frame 6 Rear frame 7 Left frame 8 Right frame 10 Fixing pin 11 Pin receiving hole 15 End plate 21 Hinge pipe 22 U-shaped connecting ring 23 Spring 24 Retracting pin 27 Connecting hole

Claims (1)

[Claims] 1. A quadrangular grid-shaped lid main body is fitted in a quadrangular receiving frame composed of front and rear frames and left and right frames, and is upwardly opened and rotated around a hinge portion provided at a base end side of rotation of the lid main body. In the freely openable and closable lid, the hinge portion is provided between the end plate on the rotation base end side of the lid body and the front or rear frame of the receiving frame that is adjacent to and parallel to the end plate. Has a hinge pipe arranged in a gap, and one end of the hinge pipe is rotatably inserted into a fixing pin projecting from an inner surface of the left or right frame which is closely opposed to the hinge pipe. The other end has a retractable pin that is urged axially outward by a spring in the hinge pipe, and the tip of the retractable pin is the right or left frame of the receiving frame that closely faces the other end of the hinge pipe. Is rotatably inserted in a pin receiving hole provided in And a circular arc portion of the U-shaped connecting ring is passed through the connecting hole so as to wrap around the upper portion of the connecting hole of the end plate, and both leg ends of the U-shaped connecting ring are fixed to the hinge pipe. An openable lid that features that.