JP2507014Y2 - Locking device for lids for underground structures - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a locking device for lids for various underground structures.

The "underground structure lid" referred to in the present specification means a large iron lid, a manhole lid, a sewage basin lid for closing an opening that connects an underground buried object in a sewer or an underground structure facility to the ground.
A lid for joint gutters that can open and close to protect underground facility equipment and wiring for power and communication, a lid for power transmission and distribution, a buried conduit under the road surface for waterworks and gas, and a fire hydrant as an opening and closing door that connects its accessory equipment to the ground. Lids, water control valve lids, sluice valve lids, air valve lids, gas pipe lids, water meter lids, etc.

[Conventional technology]

Conventionally, the lid of underground structures such as manholes has a lock structure that is used to prevent illegal dumping from the outside and to prevent scattering of the lid due to internal turbulent pressure during heavy rainfall. There is. There are various types of this locking structure depending on the specifications of the lid, installation conditions, and the like. For example, there is one that has been filed and published as Japanese Utility Model Publication No. 60-7418.

This is to pivotally support a locking hook near a burr hole opened at the edge of the lid so that the engaging portion formed at the lower end of the locking hook engages with an engaging protrusion formed on the inner wall of the receiving frame. By doing so, it is possible to lock. In this locking hook, a bar having a T-shaped engaging piece at the tip thereof is inserted into a bur hole, and only by rotating this, the engaging portion of the locking hook engages with the receiving frame around the pivot point. It can be unlocked by rotating in the direction away from the protrusion. In order to realize such a structure, a bar engaging portion whose one side surface is substantially aligned with the opening edge of the bar hole is projectingly provided on the upper end of the locking hook, and the engaging piece at the tip of the bar is rotated on the upper surface thereof. It forms an inclined bar pressure receiving surface that rotates the locking hook around its pivot point.

[Problems to be solved by the device]

With this locking structure, the bar pressure receiving surface of the locking hook cannot be easily found from the outside, and the lid cannot be opened without using a dedicated bar, so it is possible to prevent the lid from being opened illegally from the outside. Is a valid one.

However, in this locking structure, a space where the engaging piece at the tip of the burl can rotate is required below the burl hole to which the locking hook is attached, and this burl hole is unlocked and unlocked when it is blocked by earth and sand or the like. Since the lid cannot be opened, it is formed in an open state that communicates with the inside of the underground structure. Therefore, when it rains, there is a problem that a large amount of earth and sand and rainwater flow in from the burl holes, which hinders internal equipment and overloads the sewage treatment plant in manholes.

Therefore, an object of the present invention is to provide a locking device for a lid for an underground structure, which is capable of solving such a problem by newly providing a member that opens and closes the burl hole.

[Means for solving the problem]

In the locking device for a lid for an underground structure of the present invention, a closing block and a locking block are rotatably attached to the lower surface in the vicinity of the burl hole opened in the lid body, and the closing block closes the burl hole so as to be opened and closed. And a locking hole that allows the burr hole to be closed by its own weight when there is no load, and the locking block has an engaging hook at its lower end that rotates by its own weight and engages with the locking of the receiving frame. Further, a pressure-receiving surface for a burl having an inclination capable of converting the rotation of the burl inserted into the burl hole into a rotation around a pivot is provided at the upper end portion.

[Action]

When a burr having an engaging piece formed at the tip is inserted into the burr hole and the closing plug that closes the burr hole is pushed down, the closing block rotates about the pivot axis and the burr hole is opened.
When the burl is rotated, the tip of the burl moves along the pressure receiving surface at the upper end of the locking block. At this time, if the pressure receiving surface is an inclined surface with the tip side facing upward, the locking block rotates around the pivot axis as the burl rotates, and the engaging hook at the lower end moves in the direction away from the locking of the receiving frame. It is unlocked. Further, when closing the lid main body, the burl is inserted so that both the locking block and the closing block are retracted, and the burl is pulled out after fitting the lid main body to the receiving frame. As a result, the locking block and the closing block rotate about their own axes by their own weights, the locking hook of the locking block engages with the locking of the receiving frame to lock the lid body, while the closing plug of the closing block locks the burr hole. Block.

In this way, the burl hole is always closed by the closing block, and the burl hole is opened by the operation of the burl when opening the lid, and subsequently the unlocking operation of the locking block can be performed. Therefore, the blocking block prevents foreign matter from flowing in, and at the same time, even if the blocking block is newly attached, it is possible to open and close the lid main body with one burl.

〔Example〕

Hereinafter, the features of the present invention will be specifically described based on the embodiments shown in the drawings.

FIG. 1 is a cutaway plan view showing an essential part of the present invention, and FIG. 2 is a plan view of a lid body.

The lid body 1 is fitted and supported by the inner peripheral taper surface of the receiving frame 2, and at the edge portion of the lid body 1, a burl hole 1a for opening the lid is provided.
Is provided. On the back surface of the lid body 1, a pair of holding seats 3a and 3b are formed with the burl hole 1a interposed therebetween. And
Pivotal support ribs 3c and pivot support holes 3d for rotatably supporting a pivot 7 of a locking / closing device 4 to be described later are formed on inner wall surfaces of the holding seats 3a, 3b which face each other.

3 (a) is a front view of the locking / closing device 4, FIG. 3 (b) is a side view, and FIG. 4 is an exploded perspective view.

The locking / closing device 4 includes a locking block 5 and a closing block 6.
It has a structure in which and are independently rotatable on the axis 7.

The lock block 5 has an insertion hole through which the pivot 7 is inserted at the upper end.
5a is bored to form a pressure receiving surface 5b for unlocking operation in a direction intersecting with the axis of the pivot 7. This pressure receiving surface 5b is the fourth
As shown in the figure, its upper surface is inclined upward from the base end, and when attached to the holding seats 3a, 3b as shown in FIG. 1, its side wall surface is along the edge 1b of the burl hole 1a. To position. An engaging hook 5c is provided at the lower end of the locking block 5 to engage with a lock 2a protruding from the inner wall of the receiving frame 2. The engaging portion is so urged in the locking direction indicated by the arrow in FIG. 3 (b) when it is mounted on the holding seats 3a, 3b.
The weight such as 5c and the total length are set.

On the other hand, similarly to the locking block 5, the closing block 6 is also provided with an insertion hole 6a through which the pivot 7 is inserted at the upper end thereof so that the pivot 7 is biased in the direction of the arrow in FIG. 3 (b). The total weight and the length to the bottom are set. Also, project the arm 6b from the upper end and fix the fixed seat 6c
Is provided and the packing 8 is attached to the upper surface of the burr hole 1a by fixing metal fittings 6d and screws 6e to form a closing plug A. When the locking block 5 and the blocking block 6 are integrated with the pivot 7 as shown in FIG. 1, the blocking plug A runs along the edge of the pressure receiving surface 5b to prevent mutual interference. ing. Further, as in the present embodiment, a stopper 6c-1 is provided on the edge of the fixed seat 6c on the side opposite to the pressure receiving surface 5c so as to project laterally, and the stopper 6c-1 is applied to the back surface of the lid main body 1 so that the plug A is closed. A structure that regulates the posture of closing the burl hole 1a is desirable. Since the stopper 6c-1 keeps the closing block 6 in a constant posture, the lid body 1 of the packing 8 is
The degree of adhesion to the back surface of is also kept uniform.

The lock block 5 and the block block 6 have respective through holes.
The locking and closing device 4 is constructed by inserting the pivot 7 into the 5a and 6a and attaching the plugs 7a to both ends. The lock block 5
A ring 7b is provided between the block and the block 6 as in the present embodiment.
It is desirable to incorporate these so as not to interfere with each other when these blocks 5 and 6 rotate.

This locking / closing device 4 is a plug on the locking block 6 side.
By inserting 7a into the pivot hole 3d first and then placing the plug 7a at the other end on the pivot rib 3c, it is mounted between the holding seats 3a and 3b as shown in FIG. Then, the bolt 3f is inserted into the hole 3e formed in the holding seat 3a and the nut 3g is screwed to prevent the locking / closing device 4 from falling off.

Locking / closing device 4 attached to the back surface of the lid body 1.
As shown in FIG. 1, the closing plug 6 of the closing block 6 closes the burl hole 1a and the edge of the pressure receiving surface 5b of the locking block 5 is along the edge 1b of the burl hole 1a. And
The engaging hook 5c of the locking block 5 is located below the lock 2a of the receiving frame 2 to lock the lid body 1. On the other hand, when the stopper 6c-1 contacts the lower surface of the edge of the burr hole 1a, the closing plug 6 of the closing block 6 becomes substantially horizontal.
In this way, the locking / closing device 4 locks the lid body 1 and closes the burl hole 1a at the same time. Therefore, since the burl hole 1a is closed by the closing plug A while the lid body 1 is closed, foreign matter such as rainwater does not flow into the earth and sand, and the internal equipment and the like can be protected. Further, earth and sand are not caught in the movable member of the locking / closing device 4, and the rotation of the locking block 5 and the closing block 6 around the pivot 7 is kept in a smooth state.

FIG. 5 shows the tip of the burl 9 used when opening the lid. The burl 9 is provided with an operating rod 9a and a T-shaped engaging piece 9b at its tip, and the engaging piece 9b is formed such that its longitudinal direction is shorter than the radial length of the burl hole 1a and longer than the tangential direction, and is rotated. The engaging portions are adapted to engage with both sides of the burl hole 1a when they are pushed.

The operation of opening the lid body 1 using the burl 9 is performed as follows.

First, as shown in FIG. 6, the longitudinal direction of the engagement piece 9b of the burl 9 is made parallel to the edge portion 1b of the burl hole 1a, and thereafter, as shown in FIG. 7 (a), the block block 6 is closed. Stopper A
While pushing down, insert the engagement piece 9b into the burl hole 1a. When the crowbar 9 is further pushed down and the closing block 6 is rotated, the back surface of the lower end of the closing block 6 contacts the back surface of the lid body 1, and the engaging piece 9b of the crowbar 9 causes the pressure receiving surface of the locking block 5.
It is held on the base end of 5b so that it can be lifted up. Then, from this state, as shown in FIG. 6, the operating rod 6a is rotated clockwise to move the engaging piece 9b to the upper side of the pressure receiving surface 5b of the locking block 5, whereby the locking block 5 is unlocked. Rotate. This unlocking operation will be described in more detail with reference to FIGS. 8 and 9.

FIG. 8 and FIG. 9 are views for explaining the rotation of the closing block 6 and the unlocking operation of the locking block 5 by the burl 9.

8 (a) and 8 (b) show a process in which the burl 9 is inserted and the closing plug A is pushed down similarly to FIG. 7 (a), and the engaging piece 9b is still on the pressure receiving surface 5b. It is not mounted, and the lock block 5 remains locked. Then, after the closing block 6 is rotated to the state of FIG. 7 (b), the operating rod 9a is gradually rotated as shown in FIG. 9 (a) so that the engagement piece 9b gradually moves onto the pressure receiving surface 5b. Begin to appear in.

In FIG. 9 (a), the engagement piece 9b of the burl 9 is slightly pressure receiving surface 5b.
The lock block 5 starts to rotate clockwise around the pivot 7 in FIG. 8 (c). That is, the pressure receiving surface 5b is inclined so that its tip end side is upward, while the engaging piece 9b of the burl 9 is held by the closing plug A of the closing block 6, so that the engaging piece 9b is rotated with the rotation of the engaging piece 9b. As shown in FIG. 8 (b), the lock block 5 rotates in the direction in which its lower end moves away from the inner wall of the receiving frame 2.
When the engaging piece 9b is further rotated, the engaging hook of the locking block 5
5c gradually moves away from below the lock 2a of the receiving frame 1 and shifts to the unlocked state. Next, when the engagement piece 9b is in a state of straddling the burl hole 1a as shown in FIG. 9 (b), the locking block 5 is rotated by the maximum angle as shown in FIG. 8 (d) to reach the unlocked state. .

After the above unlocking operation, the operating rod 9a of the burl 9 is tilted toward the outside of the receiving frame 2 while keeping the state of the engaging piece 9b of FIG. The lid can be opened by raising the hole 1a side and further raising the burl 9.

When closing the lid, the engaging piece 9b of the burl 9 inserted into the burl hole 1a is left in the state shown in FIG. 9 (b), and the lid body 1 is fitted into the receiving frame 2 in this state. At this time, the locking block 5 is at the position retracted from the lock 2a and does not interfere with the work of fitting the lid body 1 into the receiving frame 2.
Then, after adjusting the posture of the lid main body 1, when the engaging portion 9b is rotated counterclockwise in FIG. 9 (b), the locking block 5 is rotated by its own weight around the pivot axis 7 in FIG. 3 (b).
Is rotated in the direction of the arrow, and the engaging hook 5c at the lower end moves below the lock 2a and is locked.

Further, when the burl 9 is pulled out from the burl hole 1a after this locking, the blocking block 6 is released as in the case of the locking block 5.
Is rotated by its own weight, and the closure plug A closes the burl hole 1a.

Thus, since the closing block 6 for closing the burl hole 1a is provided in addition to the locking block 5, the burl hole 1a can be normally closed by the closing block 6. Therefore, foreign matters such as earth and sand and rainwater do not flow in from the burl hole 1a, and the internal equipment and the like are protected. In addition, the movable members of the locking / closing device 4, particularly the pivot 7 and the locking member,
Since foreign matter does not get caught in the insertion holes 5a and 6a of the closing blocks 5 and 6, the lid body 1 can be opened and closed smoothly, and maintenance and inspection can be significantly facilitated. Further, the lid-opening work can be performed only by inserting one bar 9 into the burl hole 1a and rotating the burl 9, so that even one operator can easily perform the work.

In the above embodiment, the locking block and the closing block are coaxial with each other by the pivot, but the present invention is not limited to the coaxial, and after the closing plug of the closing block is pushed down by the burl, the burl is rotated. By
The structure may be such that the engagement piece of the burl is brought into contact with the inclined pressure receiving surface of the locking block to rotate the locking block in the unlocking direction.

[Effect of device]

As described above, in the present invention, the locking block for locking the lid body and the closing block for closing the burr hole for inserting the opening bar are provided, and the locking block is unlocked by inserting and rotating the burl. I have to.
Therefore, unlike the conventional case, the burr hole is not left open, and the lid is prevented from inflowing foreign matter from the outside or illegal dumping. Further, even if the lid body can be opened and closed by inserting the burl and rotating the lid body, a structure in which a blocking block is newly added does not hinder the opening and closing work of the lid body.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view showing a main part of the present invention, FIG. 2 is a plan view of a lid body, FIG. 3 (a) is a front view of a locking / closing device, and FIG. 3 (b) is a locking view. Fourth side view showing the outline of the state
Fig. 5 is an exploded perspective view of the locking / closing device, Fig. 5 is a perspective view of the tip of the burl, Fig. 6 is a partially cutaway plan view in which the burl is inserted into the burl hole, and Fig. 7 (a) shows the blocking block. FIG. 7 (b) is a side view of a main part when the closed block is rotated by the maximum angle,
FIGS. 8 (a) to 8 (d) are views showing an unlocking operation by the burl, FIG. 9 (a) is a partially cutaway plan view of an essential part in the initial stage of unlocking, and FIG. 9 (b) is a view after completion of unlocking. FIG. 3 is a partially cutaway plan view of an essential part of FIG. 1: Lid body, 1a: Bar hole 1b: Edge part 2: Receiving frame, 2a: Locking 3a, 3b: Holding seat, 3c: Pivoting rib 3d: Pivoting hole, 3e: Hole 3f: Bolt, 3g: Nut 4 : Locking / closing device 5: Locking block, 5a: Insert hole 5b: Pressure receiving surface, 5c: Engaging hook 6: Closing block, 6a: Insert hole 6b: Arm, 6c: Fixed seat 6c-1: Stopper, 6d: Fixed Metal fitting 6e: Screw, 7 ... Axis 7a: Plug, 7b: Ring 8: Packing, 9: Bar 9a: Operating rod, 9b: Engagement piece A: Closure plug

Claims (1)

(57) [Scope of utility model registration request] 1. A closing block and a locking block are rotatably attached to a lower surface near a burr hole opened in a lid body, respectively, and the closing block is provided with a closing plug for opening and closing the burl hole and its own weight. The blocking plug can close the burl hole when there is no load, and the locking block has an engaging hook at its lower end that rotates by its own weight and engages with the lock of the receiving frame. A locking device for a lid for an underground structure, comprising a pressure-receiving surface for a burl having an inclination capable of converting a rotation of the burl inserted into the baffle into a rotation about a pivot axis.