JP4666536B2 - Cap for closing the opening operation tool insertion hole of buried objects - Google Patents

Description

The present invention relates to an underground operation such as an electric wire / cable housing box or a common groove, and is attached to the upper surface of the cover of the main part of the embedded object or the cover of the manhole part, and the opening operation tool insertion hole provided in the cover The present invention relates to a cap for closure used to secure a normally unusable state.

In the conventional manhole cover, the opening operation tool insertion hole provided on the upper surface is left open on the road surface, and therefore clogged with mud and dust after a certain period. Therefore, when opening the lid of the manhole part, it is necessary to perform a pre-operation for removing mud and dust, which requires considerable effort and time.

It has also been proposed to fit a rubber cap or the like into the receiving hole, but with a cap that has just been fitted, it can easily escape from the receiving hole due to contact with the wheels of the traveling vehicle or pedestrian shoes or vibration. As a result, the original occlusion function cannot be maintained over a long period of time.

In view of this, there has been provided a closing device capable of accurately protecting the opening operation tool insertion hole from clogging with mud and dust over a long period of time (Patent Document 1).
The closing device is composed of a cap main body, a lock shaft, and a clasp plate, and the cap main body includes a shaft tube portion that is inserted into an opening operation tool insertion hole of a target lid, and an upper end portion of the shaft tube portion. And an upper surface board portion fitted into an upper surface recessed portion of a horizontal wall portion around the opening operation tool insertion hole.

The lock shaft is fitted into the shaft cylinder portion of the cap body so as to be movable up and down, and is urged upward by a spring. A passive portion that engages with the drive portion of the operation handle is provided at the upper end of the lock shaft. The clasp plate is fixed to a lower end portion of the lock shaft protruding to the lower surface side of the horizontal wall portion, and can enter and exit from the opening operation tool insertion hole. The upward arm portion of the clasp plate is engaged with and disengaged from a lower surface groove portion that forms an angle with respect to the opening operation tool insertion hole of the horizontal wall portion.

In the closing cap, when the lid opening operation tool is not used, the shaft cylinder portion of the cap body is fitted in the opening operation tool insertion hole, and the upper surface recess around the opening operation tool insertion hole is formed on the cap body. Since the upper surface board portion is fitted, and thereby the opening operation tool insertion hole is completely closed, the intrusion of mud and dust is accurately prevented.

Further, in this closed state, the upward arm portion of the clasp plate is engaged with the lower surface groove portion of the horizontal wall, and the engagement is firmly held by the bias of the spring. Therefore, the cap body does not unintentionally escape from the opening operation tool insertion hole due to contact or vibration.

This closure cap is useful in that it can accurately protect the opening operation tool insertion hole from clogging with mud and dust and does not escape due to contact with the wheels of the traveling vehicle or vibration. However, since the rotation operation of the lock shaft is not necessarily performed using a dedicated operation handle, there is a problem in terms of security.

In recent years, poles have been removed from the streets, and various types of power and communication cables have been stored in underground buried boxes and caverns. The required part of the buried object has an open structure, and a manhole is attached at every required interval. A lid is fitted to the opening part and the entrance / exit part of the manhole, and the lid is locked to the underground object body or the manhole body by a locking device.

In this way, even if the lid itself is locked to the underground object body or the like by the locking device, the cap for closing the opening operation tool insertion hole is not locked to the lid by the required locking device. Will be lacking. That is, by opening the closing cap with a tool such as a bar, the opening operation tool insertion hole can be easily exposed.

Japanese Patent No. 2587393

An object of the present invention is to provide a cap for closing an opening operation tool insertion hole of a buried underground object, in which a lock unit is incorporated as a main operating member, and thus a security function is remarkably improved.

The cap for closing the opening operation tool insertion hole of the underground object of the present invention is in contact with the upper surface of the target lid, and the opening operation is performed on the lower surface side of the top plate portion that closes the opening operation tool insertion hole. A cap body in which a skirt portion to be fitted into the tool insertion hole is continuously provided;
A pair of latch levers housed in the skirt portion and connected to the cap body by a horizontal pivot so as to be swingable, and a latching claw on each outer surface protrudes and retracts from a side groove of the skirt portion;
The center line is inserted into the insertion / removal hole formed in the top plate portion so that it passes through the middle point of the pair of latch levers, and the rotor is rotated with a key to engage the lock plate with the lock receiving portion on the skirt portion side. A lock unit that is fixed to the cap body so that it cannot be removed.
When the lock unit is inserted into the insertion / removal hole, the pair of latch levers are rotated outward about the horizontal pivot by pressing the inner side surfaces of the pair of latch levers at the tip of the lock unit. The lid is sandwiched between the latching claw and the top plate portion protruding from the side groove.

In the closing cap of the present invention, a pair of latch levers are housed in the skirt portion of the cap body, and the pair of latch levers are swingably connected to the cap body by a horizontal pivot, and a center line is An insertion hole is formed in the top plate portion of the cap body so as to pass through an intermediate point of the pair of latch levers, and when the lock unit is inserted into the insertion / removal hole, the pair of latch levers at the tip of the lock unit. The latch plate and the top plate portion of the latch lever projecting from the side groove of the skirt portion by pushing the inner side surface portions of the skirt portion and pivoting the pair of latch levers outward about the horizontal pivot. The lock unit rotates the rotor with a predetermined key so that the lock plate is attached to the skirt. By engaging the lock receiving side, it is fixed non sampling to the cap body.

As described above, in the closing cap according to the present invention, the lock unit is incorporated and used as a main operating member, and in order to remove the closing cap from the opening operation tool insertion hole, the rotor is reversed with a predetermined key. Therefore, the security function is remarkably improved, and it is possible to reliably prevent unauthorized opening of the target lid by a malicious person.

In the embodiment of the present invention shown in FIGS. 1 to 6, the top plate portion 2 of the cap body 1 is rectangular, and the skirt portion 3 is integrated with the outer peripheral flange portion 2 a on the lower surface side of the top plate portion 2. It is connected to. The outer peripheral flange portion 2 a comes into contact with the upper surface of the hole edge portion of the opening operation tool insertion hole 5 of the lid 4. The planar shape of the opening operation tool insertion hole 5 is a shape in which a rectangular portion narrower than the diameter of the circular portion is coupled to both sides of the circular portion. This shape matches the cross-sectional shape of the distal end portion of the opening operation tool formed by penetrating the distal end portion of a thick round bar in a diameter direction with a round bar having a smaller diameter than the round bar.

A disk-shaped stopper 27 that prevents intrusion of earth and sand and dust into the lock unit 6 is fitted into the upper diameter-enlarged portion 29 a of the insertion / extraction hole 29. A vertical groove 7 is formed in the step shoulder 29b between the main body portion of the insertion / extraction hole 29 and the upper end enlarged diameter portion 29a. A lock pin 9 provided on the outer cylinder 8 of the lock unit 6 is fitted in the vertical groove 7, and the lock unit 6 cannot be rotated with respect to the cap body 1 by the lock pin 9.

The side groove 10 of the skirt 3 is formed over the entire height of the skirt 3, and the inner end communicates with the insertion / removal hole 29. Three screw hole-shaped shaft holes 11 that cross the side surface groove 10 are arranged in the height direction, and the pair of latch levers 12 are screw-shaped horizontal pivots that are passed through the through holes 28 at the upper end. By screwing 13 into any one of the shaft holes 11, the position is adjusted in three stages, so as to correspond to the difference in thickness of the target lid 4. The latching claw 14 of the latch lever 12 is formed integrally with the latch lever 12.

The center point of the insertion / removal hole 29 of the lock unit 6 is at an intermediate point between the pair of left and right shaft holes 11, 11, and the lower ends of the pair of left and right latch levers 12, 12 when the lock unit 6 is removed from the insertion / removal hole 5. The corners 15 and 15 stand by at the positions where they enter the insertion / extraction hole 29 by the same distance. Therefore, when the lock unit 6 is inserted into the insertion / removal hole 29, the pair of left and right latch levers 12, 12 rotate outward in synchronization, and the left and right locking claws 14, 14 protrude from the side groove 10 at the same time. .
The latch lever 12 is automatically rotated to the standby position when the weight on the lower end corner 15 side is larger than the weight on the locking claw 12 side with respect to the horizontal pivot 13.

A stopper wall portion 16 with which the lower end portion of the lock unit 6 abuts is formed at the bottom of the skirt portion 3. The stopper wall portion 16 is formed with earth and sand or water discharge holes 17. A rectangular hole-shaped lock receiving portion 18 is formed in the skirt portion 3 at a position close to the stopper wall portion 16. By rotating the rotor 19 of the lock unit 6 with a predetermined key 20, The lock plate 21 that is interlocked is engaged or disengaged, and the lock unit 6 is fixed to and released from the cap body 1.

In a state where the lock unit 6 is completely removed from the insertion / removal hole 29 of the cap body 1, the tip of the locking claw 14 of the latch lever 13 is retracted into the side groove 10 of the skirt portion 3, and the lid opening operation is performed. The removal of the cap body 1 from the tool insertion hole 5 is smoothly performed without being obstructed by the locking claw 14 of the latch lever 12.

In another embodiment of the present invention shown in FIGS. 7 to 10, the latching claw 14 of the latch lever 12 is configured separately from the latch lever 12. That is, a guide groove 22 in the height direction is formed on the outer surface of the latch lever 12, and the base portion 23 of the locking claw 14 is slidably fitted in the guide groove 22. A long hole-shaped through hole 24 is formed in the base portion 23 of the locking claw 14, and the locking claw 14 has a high height by a screw 26 screwed into the screw hole 25 of the latch lever 12 from the through hole 24. The position is adjusted in the vertical direction and fixed to the latch lever 12. The screw holes 25 of the latch lever 12 are provided in two different positions in the height direction, the height adjustment width of the locking claw 14 is widened, and the various lids 4 whose thickness varies greatly are provided. It can be adapted.
Since the points other than the expansion of the adjustment range are the same as those in the above embodiment, the description thereof will be omitted. In any embodiment, a cylinder lock is used as the lock unit 6, but the built-in lock mechanism is not particularly limited.

It is a top view of the cap for closure concerning one example of the present invention. FIG. 2 is a partially cutaway front view of the closing cap of FIG. 1. It is a bottom view of the closure cap of FIG. It is the sectional view on the AA line of FIG. FIG. 3 is a sectional view taken along line B-B in FIG. 2. It is sectional drawing of the state which pulled out the lock unit in the cap for closure of FIG. It is a top view of the cap for closure concerning another example of the present invention. It is a partially cutaway front view of the closure cap of FIG. It is a bottom view of the closure cap of FIG. It is CC sectional view taken on the line of FIG. It is sectional drawing of the state which pulled out the lock unit in the cap for closure of FIG.

DESCRIPTION OF SYMBOLS 1 Cap main body 2 Top plate part 2a Outer peripheral flange part of top plate part 3 Skirt part 4 Lid 5 Opening operation tool insertion hole 5a Upper end enlarged diameter part of opening operation tool insertion hole 5b Step shoulder part of opening operation tool insertion hole 6 Locking Unit 7 Vertical Groove 8 Locking Unit Outer Tube 9 Locking Pin 10 Skirt Side Groove 11 Skirt Shaft Hole 12 Latch Lever 13 Horizontal Pivot 14 Latch Lever Locking Claw 15 Latch Lower End Corner 16 Skirt Stopper wall portion 17 discharge hole 18 lock receiving portion 19 rotor 20 key 21 lock plate 22 guide groove of latch lever 23 base portion of locking claw 24 through hole of base portion 25 screw hole of latch lever 26 screw 27 plug 28 latch lever Through hole at the upper end of

Claims (1)

A cap body that is in contact with the upper surface of the target lid and is provided with a skirt portion that is fitted in the opening operation tool insertion hole on the lower surface side of the top plate portion that closes the opening operation tool insertion hole;
A pair of latch levers housed in the skirt portion and connected to the cap body by a horizontal pivot so as to be swingable, and a latching claw on each outer surface protrudes and retracts from a side groove of the skirt portion;
The center line is inserted into the insertion / removal hole formed in the top plate portion so that it passes through the middle point of the pair of latch levers, and the rotor is rotated with a key to engage the lock plate with the lock receiving portion on the skirt portion side. A lock unit that is fixed to the cap body so that it cannot be removed.
When the lock unit is inserted into the insertion / removal hole, the pair of latch levers are rotated outward about the horizontal pivot by pressing the inner side surfaces of the pair of latch levers at the tip of the lock unit. The closure cap for the opening operation tool insertion hole of the underground buried object is configured such that the lid is sandwiched by the locking claw and the top plate portion protruding from the side groove.

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