JPH09184189A - Locking device for cover of u-shaped gutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make cover bodies to be laid over a U-shaped gutter lockable with one another, and to ensure safety while making the gutter usable as a simple utility tunnel for laying communication cables, electric power cables, etc., therein. SOLUTION: A horizontal hole 12 opened at the end butting against an adjoining cover body, a vertical hole 14 communicating with the horizontal hole 12 while being opened to the upper surface of the cover body, and a locking piece 15 slidably housed in the horizontal hole 12 and being projected at its front end beyond the opening of the horizontal hole 12 while being energized in the direction of projection are provided. The locking piece 15 is provided at either one of the two horizontal holes 12 formed at both ends of the cover body. A tapered notch 17 is formed for the cover body 10 at its lower corner of the end where the horizontal hole 12 is opened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a U-shaped groove lid locking device.

[0002]

2. Description of the Related Art A U-shaped groove made of concrete is laid on the side of a road and used for drainage, or used for supplying agricultural water. For this reason, when using a lid,
It is sufficient to fit the lid into the opening, and no locking device is provided.

If a conventionally known U-shaped groove is used for installation of a communication cable, an electric power cable or the like, a simple joint groove can be obtained, but a locking device for a lid is indispensable for ensuring safety. It becomes equipment.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a lid locking device for a U-shaped groove.

[0005]

The lid body is provided with a lateral hole portion 12 which is opened in each end wall surface where the lid bodies are adjacent to each other, and the lateral hole portion 12.
A vertical hole portion 14 that is open to the upper surface of the lid and that is slidably accommodated in the horizontal hole portion 12, and has a tip protruding from the opening portion of the horizontal hole portion and biased in the protruding direction. The lock piece 15 is provided on either one of the lateral hole portions 12 formed on the end wall surface of the lid body, and the lid body 10 is an end wall surface on which the lateral hole portion 12 opens. It is characterized in that a tapered notch portion 17 is formed in the lower corner portion.

The lock piece 15 is housed in the lateral hole 12 with a spring attached to the base end thereof, and the rounded portions 15a are formed at the respective corners of the tip end thereof. When inserted into the lateral hole of the body, the tip of the lock piece projects from the end wall surface of the lid 10 by a length that does not close the vertical hole 14 communicating with the lateral hole. In addition, the lock piece is half the depth of the side hole,
Approximately half of the lid body is projected from the end wall surface, and the lid body 1
The vertical hole portion of 0 is characterized in that it is formed at the position of the back portion which bisects the horizontal hole portion 12.

The jig 20 for unlocking the lid is provided with a vertical bar 22 on one end of the bar handle 21 in the same direction.
On the other hand, a vertical pipe 23 is provided, and a lock releasing rod 24 is inserted into the vertical pipe 23, and a plate-shaped L-shaped locking plate 25 is formed at the lower end of the vertical rod 22. To L
A mold locking rod 26 is formed and a handle portion 27 is formed on the upper end, and the distance between the vertical rod 22 and the lock releasing rod 24 is the same as the distance between the vertical hole portions 14 provided in the lid 10. To do.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a state in which a lid is fitted in a U-shaped groove and the lids are locked. Reference numeral 1 is a U-shaped groove body in which stepwise engagement edges 2 are formed on both sides of the opening. A lid 10 has a width that allows it to be fitted into the engaging edge 2 of the U-shaped groove body 1, and is provided with locking means 11 for coupling the lid bodies to each surface along the length of the groove body. Both the U-shaped groove body 1 and the lid 10 are made of concrete.

The locking means will be described with reference to FIGS. Figure 2A
Shows a vertical cross section of the lid, and FIG. 2B shows a cross section of the lid. The lid body 10 is provided with a lateral hole portion 12 that opens toward each end wall surface where the lid bodies are adjacent to each other, and a spring insertion hole 13 is provided in the bottom bottom surface of the lateral hole portion 12.
Further, a vertical hole portion 14 is provided on the upper surface of the lid body 10 so as to communicate with the lateral hole portion 12 and open on the upper surface of the lid body. In the embodiment, the front shape of the lateral hole portion 12 is a horizontally long rectangle,
Further, the plan shape of the vertical hole portion 14 is a rectangle parallel to the edge of the end wall of the lid body. The vertical hole portion 14 is located at the horizontal hole portion 12
When the depth of is divided into two, it is opened toward the part closer to the back.

Reference numeral 15 denotes a lock piece to be housed in the lateral hole portion 12, which has a cross-sectional shape approximate to that of the lateral hole portion 12 and an overall length substantially matched with the depth of the lateral hole portion 12. . A coil spring 16 is attached to the base end of the lock piece 15, and the spring is connected to the insertion hole 13 formed on the bottom surface of the lateral hole. Further, the tip of the lock piece 15 has a rounded portion 15a at each corner. 15 tablets
It is desirable that both the coil spring 16 and the coil spring 16 are made of a material that does not easily rust. For example, the lock piece 15 is made of plastic and the coil spring 16 is made of stainless steel.

To mount the lock piece 15 in the lateral hole 12,
The coil spring 16 is fitted into the base end of the lock piece, and the spring is pushed toward the bottom of the hole from the opening of the lateral hole. In order to prevent the coil spring 16 from coming out of the insertion hole 13, the insertion hole may be a round hole, and the diameter of the hole may be slightly smaller than the diameter of the spring to press-fit the spring. As shown in FIG. 2, the tip of the lock piece 16 protrudes from the lid 10 by a half length of the whole, and when the lock piece 16 is pushed against the spring, the whole is housed in the lateral hole 12.

Reference numeral 17 denotes a taper notch formed in the lower corner of the lateral hole 12 that opens to the end wall surface of the lid body 10.
The width is the same as or slightly longer than the width of the second opening.

The horizontal hole portion 12, the vertical hole portion 14, and the tapered notch portion 17 are formed on both end wall surfaces of the lid body 10, but the lock piece 15 is attached to only one of the horizontal hole portions 12. .

Next, a method of laying the lid will be described with reference to FIG. The lid 10 is arranged so that the directions in which the lock pieces 15 project are aligned. Then, the lid 10 is sequentially fitted to the engaging edge 2 of the U-shaped groove body 1. FIG. 4B shows a case where the lid body is laid from the vertical direction, and it is assumed that a gap for one lid body is formed between the already laid lid body 10A and another lid body (not shown). The lid 10B to be newly laid is U from above.
Insert into the groove body 1.

Although the left side of the new lid 10B is omitted, the lock piece will hit the edge of an existing lid (not shown) laid on the left side. Push it down and lay it in place. At the same time, the lock piece 15 of the existing lid 10A laid on the right side is retracted against the coil spring by the action of the tapered notch portion 17 when the new lid 10B descends, and a new one is retracted. The lid 10B is lowered.

When a new lid 10B is laid at a predetermined position, the lock piece of the lid 10B is inserted into a lateral hole portion of an existing (left) lid (not shown), or the existing (right) shown. The lock piece 15 of the lid body 10A is inserted into the lateral hole portion 12 of the new lid body 10B. Therefore, all of the laid lids are locked by inserting the lock pieces 15 into the lateral holes of the adjacent lids.

FIG. 4C shows a case where the lid body is laid from the lateral direction, which is a laying method suitable for the initial stage of the laying work.

5 and 6 show an example of an unlocking jig suitable for removing the lid. In FIG. 5, a jig main body 20 having a U-shaped front face is provided with a bar handle 21 and a vertical bar 22 on one side and a vertical pipe 23 on the other side in the same direction at both ends of the bar handle 21. The lock removing rod 24 is inserted into the inside of 23. In addition, the lower end of the vertical bar 22 is formed in a plate shape, and is bent L toward the outside.
A mold locking plate 25 is formed. The unlocking rod 24 projects vertically from the vertical pipe 23 and is rotatable, and the lower end thereof is formed with an L-shaped locking rod 26 bent in an L shape.
A handle portion 27 is formed at the upper end.

The vertical bar 22 of the jig main body 20 and the unlocking bar 2
The interval of 4 is set to match the installation interval of the vertical hole portion 14 of the lid 10.

In addition, the unlocking jig is provided with an auxiliary jig body 30. The auxiliary jig body 30 has an L-shaped locking rod 32 formed at the lower end of a rod main body 31 and an annular handle 33 formed at the upper end. ing.

FIG. 5 shows a state in which the lids 10A, 10B and 10C are locked and laid in the order shown, and a procedure for removing the lid 10B laid in the middle will be described here. First, the vertical rod 22 and the unlocking rod 24 of the jig main body 20 are inserted into the vertical hole portion 14 of the lid 10B.
Since the lock piece 15 has not reached the horizontal hole 12 communicating with the vertical hole 14a on the right side, the L-shaped locking rod 26 of the unlocking rod 24 is inserted up to the horizontal hole 12. Also, the vertical hole 1 on the left side
Since the vertical bar 22 inserted in the 4b has the lock piece 15 housed in the horizontal hole (in FIG. 6A, the vertical hole 1 of the lid 10A).
4 is the same as inserting the vertical bar 22), L-shaped locking plate 25
Is inserted into the gap between the lock piece 15 and the lateral hole 12 in the lateral hole 12.

The jig main body 20 is the vertical hole portion 14 of the lid 10B.
After being inserted into a and 14b, the unlocking rod 24 is rotated about 90 degrees counterclockwise via the handle portion 27. FIG.
As shown in B, the tip of the L-shaped locking rod 26 of the unlocking rod 24 moves the lock piece 15 back to the lateral hole 12 of the lid 10A against the coil spring 16 to lock the lid 10A. To release.

On the other hand, the auxiliary jig body 30 is inserted into the vertical hole portion 14 of the lid body 10C, the auxiliary jig body 30 is rotated as described above, and the L-shaped locking rod 32 is used to lock the lock piece into the lateral hole portion of the lid body 10B. Back up.

As a result, the lid 10B is unlocked on both the right and left sides and is in a free state. Therefore, if the jig main body 20 is pulled up with the bar handle 21, the lid 10B is closed.
Can be removed from the U-shaped groove body 1.

[0025]

According to the present invention, the lids laid in the U-shaped groove can be locked with each other, so that the safety can be ensured, so that it can be used as a simple joint groove for installing communication cables, electric power cables and the like. Is.

[Brief description of the drawings]

FIG. 1 shows a state in which a lid is laid in a U-shaped groove, A is a perspective view and B is a plan view of a locking means.

2A and 2B show details of the locking means, where A is a longitudinal sectional view and B is a lateral sectional view.

FIG. 3 is a perspective view showing parts of the locking means.

4A and 4B show a procedure of laying a lid in a U-shaped groove, A is a perspective view, B is a cross-sectional view when laid from above, and C is a cross-sectional view when laid from the lateral direction.

FIG. 5 is a perspective view of an unlocking jig.

FIG. 6 shows a procedure for unlocking work, where A is a cross-sectional view at the start of unlocking and B is a cross-sectional view at the end of unlocking.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 U-shaped groove main body 2 Engagement edge 10 Lid body 11 Locking means 12 Horizontal hole portion 13 Insertion hole 14 Vertical hole portion 15 Lock piece 15a Earl portion 16 Coil spring 17 Tapered notch portion 20 Jig main body 21 Bar handle 22 Vertical bar 23 Vertical Pipe 24 Locking bar 25 L-shaped locking plate 26 L-shaped locking rod 27 Handle portion 30 Auxiliary jig body 31 Rod main body 32 L-shaped locking rod 33 Ring handle

Claims (8)

[Claims] 1. A lid body laid in an opening portion of a U-shaped groove, the lateral hole portion opening to each end wall surface adjacent to each other, and the vertical hole portion communicating with the lateral hole portion and opening on the upper surface of the lid body. And a lock piece that is slidably accommodated in the lateral hole portion and has a tip projecting from the opening of the lateral hole portion and biased in the projecting direction, the lock piece being an end wall surface of the lid body. A locking device for a U-shaped groove lid, which is provided in either one of the lateral holes formed in the. 2. The locking device for the U-shaped groove lid according to claim 1, wherein the lid body has a tapered notch formed at a lower corner of an end wall surface where the lateral hole is opened. 3. The locking device for the U-shaped groove lid according to claim 1, wherein a spring is attached to the base end of the lock piece and the lock piece is housed in the lateral hole. 4. The locking device for a U-shaped groove lid according to claim 1, wherein the lock piece has a rounded portion formed at each corner of the tip portion. 5. The lock piece, when inserted into a lateral hole portion of an adjacent lid body, projects from the end wall surface of the lid body by such a length that the tip of the lock piece does not block the vertical hole portion communicating with the horizontal hole portion. The U-shaped groove lid locking device according to any one of claims 1 to 4. 6. The lock piece has a length that is ½ of the depth of the lateral hole portion, and approximately half of the lock piece projects from the end wall surface of the lid body. The locking device for the U-shaped groove lid described in. 7. The locking device for a U-shaped groove lid according to claim 6, wherein the lid has a vertical hole portion formed at a position at a back portion which bisects the horizontal hole portion. 8. A jig for unlocking a lid laid in a U-shaped groove, wherein both ends of a bar handle are provided with a vertical bar on one side and a vertical pipe on the other side in the same direction. The lock releasing rod is inserted into the pipe, a plate-shaped L-shaped locking plate is formed at the lower end of the vertical rod, the L-shaped locking rod is formed at the lower end of the lock releasing rod, and the handle portion is formed at the upper end. An unlocking jig for locking a U-shaped groove lid, wherein the interval between the vertical bar and the unlocking bar is the same as the interval between the vertical holes provided in the lid.