JPH0754355Y2 - Lock mechanism for underground structures - Google Patents

Description

[Detailed description of the device]

[0001]

INDUSTRIAL APPLICABILITY The present invention has a protruding edge projecting inwardly inside an opening of a frame which is closed by a lid, and a hook member engageable with the protruding edge is provided on the rear surface of the lid. The present invention relates to an underground structure lock mechanism having a configuration provided in a peripheral portion.

[0002]

2. Description of the Related Art For example, a technique for locking an iron lid for closing a manhole opening is known. In addition to the locking hook member, an arm having a closing plate for closing the notch provided on the peripheral edge of the lid is provided, and the device for pushing down the closing plate to release the hook member from the locked state is also disclosed in Japanese Utility Model Publication No. 4-2209. It is known as can be seen.

However, the above-mentioned device has a structure in which the contact surface is formed at the middle position of the hook member and is pressed by the pressing portion near the tip of the arm, whereas the pressing portion is provided near the closing plate. , Since the inclined contact surface is provided relatively downward, there is a time lag before the hook members interlock, and a long stroke is required to push the closing plate before the hook members come out of the locked state. .

Although common to the conventional locking mechanism of this type,
There is a problem in that the entire mechanism is large in size, the mechanism of parts is complicated, and there are many shapes and structures that are difficult to cast.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and the problem is that the operation of interlocking and unlocking the hook member via the operating member causes almost no time difference. The object is to enable smooth and reliable operation, and to rationalize the component structure so that the entire locking mechanism can be simplified and downsized.

[0006]

In order to solve the above-mentioned problems, the present invention has a projecting edge 3 projecting inwardly inside an opening of a frame body 2 which is closed by a lid body 1. Regarding an underground structure lock mechanism having a structure in which a hook member 4 that can be fitted is provided in the peripheral portion of the back surface of the lid, an opening 5 for inserting opening tools is provided in the peripheral portion of the lid 1 , and from the opening 5 Inner lid
The operating body 6 is pivotally supported on the back surface of the body so that the operating body 6 does not swing.
The opening 5 is provided at the end outside and above the swing support shaft 7.
Direction to close the opening 5 with the closing piece 8
The biasing member 9 for biasing the closing piece 8 to the inside of the support shaft 7.
Provided on the lower side of the operating body 6 and outside the supporting shaft 7 of the operating body 6
The hanging member 10 is pivotally supported on the surface so that
The engageable hook member 4 is provided outside the hanging member 10.
And the closing piece 8 keeps the opening 5 closed.
Contact when the hook member 4 is engaged with the protruding edge 3.
Although it is not, the hanging member 1 is operated by pushing the closing piece 8.
To rotate 0 inward to remove the hook member 4 from the protruding edge 3.
While the operating body 6 is provided with a protrusion 11 that can contact the protrusion,
11 sliding contact hanging sliding surface 12 of member 10 of the
It is a measure that is provided in.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will be given below with reference to the drawings. The illustrated underground structure has a lid 1 that closes the manhole opening and a frame 2 that receives the lid 1, and a locking mechanism is provided between them.

An opening 5 into which a lid opening tool T can be inserted is formed in a peripheral portion of the lid 1 in a U-shaped notch shape. Although a drooping edge 16 is often provided in the lower peripheral portion of the lid 5, the opening 5 extends to the drooping edge 16.

An operating body 6 is attached to the peripheral portion of the back surface of the lid body slightly inward of the inner portion of the opening 5 in accordance with the position of the opening 5. The operating body 6 has a support shaft 7 projecting to the left and right of an intermediate portion, and is pivotally fixed around the support shaft 7.

Reference numeral 17 denotes a receiving portion of the support shaft 7, which is composed of a pair of left and right receiving portions 17a and 17b formed at the above-mentioned position on the back surface of the lid body, and cut-off portions 17c to receiving portions 17a and 17b of the other receiving portion 17b. Both the support shafts 7 are inserted into the recesses facing each other, and the stoppers 18 made of bolts and nuts prevent them from coming off.

A closing piece 8 for closing the opening 5 is provided at the end of the operating body 6 outside and above the swinging support shaft 7, and a biasing force for pushing the closing piece 8 in the closing direction is provided. A weight portion as the material 9 is provided inward and below the support shaft 7. The closing piece 8 and the urging member 9 are integrally cast, and are designed so that when the closing piece 8 closes the opening 5, the urging member 9 does not protrude much inward and does not contact the hanging member 10. It

A projection 19 is formed on the back surface of the lid at the back of the opening 5 so that the operating body 6 stops in the above-mentioned predetermined posture. Further, since the tip end position of the closing piece 8 is slightly higher than the support shaft 7, the turning locus thereof can reach the protruding edge 3. Therefore, a part of the projecting edge 3 that may come into contact with the rotation locus of the closing piece 8 is cut off to form a notch 13, and a recess 20 is also formed on a part of the inner surface of the frame.

A suspension member 10 is swingably supported on the back surface of the lid body outside the support shaft 7 of the operating body 6. The suspension member 10 illustrated in the drawings is pivotally supported by bearings at the back corners of the peripheral edge of the lid body by support shafts 15, 15 provided at the upper end in the left and right directions, and the above-mentioned operation is performed between the support shafts 15, 15. Body 6
Is formed in the shape of an inverted gate having a hollow space 14 that can be rotated.

The bearing portion is a pair of left and right receiving portions 21a, 2a.
1b, the support shaft 15 is guided from the cutout portion 21c of the one receiving portion 21a, and after being supported, it is retained by the stopper 18 as in the case of attaching the operating body 6.

The hanging member 10 has a hook member 4 on its lower outer surface. The hook member 4 is formed wide in the width direction of the suspension member 10, and the intermediate portion 22 is cut out in accordance with the cutout 13 of the protruding edge 3. Lower end 23 of hook member 4
Is an inclined surface, and when the lid is closed, the inclined surface of the lower end 23 is the protruding edge 3
The hook member 4 is positioned below the protruding edge 3 after the hanging member 10 is retracted inward in contact with the slope of the. When locked, the outer surface of the suspension member 10 contacts the inner edge of the protruding edge 3.

A mechanism A for interlocking the suspension member 10 with the operation of the operating body 6 is provided between both members.

As the interlocking mechanism A, a horizontal projection 11 is provided outside and below the support shaft 7 of the operating body 6, and the projection 11 is suspended from the space 14 from the hanging member 1.
It is arranged so as to be located outside 0. On the suspension member 10 side, a vertical sliding surface 12 is provided, which is separated into a right and left by a space 14, and the protrusion 11 can be slid along the sliding surface 12. Is configured.

The upper portion 12a of the sliding surface 12 of the interlocking mechanism A has a large angle of intersection with the direction of rotation of the protrusion 11 to prevent noise, vibration,
In order to prevent friction, the surface is inclined so as to recede inward so that it does not abut during normal times. This upper part 12a
Since the sliding surface 12 including the hook is brought close to the support shaft 15 of the suspension member 10, the hook member 4 can be largely retracted even if the amount by which the closing piece 8 is pressed is small.

At the lower part of the sliding surface 12 of the suspension member 10, a cavity 24 is formed for allowing the projection 11 to slide downward and for preventing rainwater, sediment pool, and the like.
Further, the lid-opening tools T can be locked to the inner corner 25 of the opening 5 by having a T-shaped portion at the tip.

[0020]

In the lock mechanism of the present invention having such a structure,
By closing the lid 1, the suspending member 10 is pushed by the projecting edge 3 as described above, and then the hook member 4 enters a locked state in which it can be engaged under the projecting edge 3 (FIG. 2). But locked
Therefore, the suspension member 10 does not come into contact with the operating body 6,
The protrusion 11 and the sliding surface 12 do not slide against each other
Yes.

The front end of the lid-opening tools T is inserted into the opening 5 in alignment with the lengthwise direction of the opening 5, and the closing piece 8 is closed there.
Immediately after pushing down, the projection 11 contacts the upper part of the sliding surface 12 of the hanging member 10 and pushes inward to move downward, so that the hook member 4 retreats inward from the projecting edge 3 (FIG. 3). .

At this time, since the lid 1 is unlocked, the direction of the tip of the lid opening tool T is changed to change the inner corner 2 of the opening 5.
The lid 1 can be opened by hooking on 5 and pulling up.

[0023]

Since the present invention is constructed and operates as described above, in order to disengage the hook member 4 from the engagement position with the projecting edge 3, the operating body 6 and the suspending member 10 are unlocked together. Can be smoothly performed with almost no time lag, the hook member 4 can be largely rotated with a small amount of operation for reliable unlocking, and the operating body 6 and the suspending member 10 are interlocked with each other at the front and rear portions. Therefore, the entire locking mechanism is downsized,
In particular, the projection 11 of the operating body 6 and the sliding surface 1 of the suspension member 10
2 does not contact in the normal state where it is closed and locked.
Because there is no vibration of the car, etc.
Also has the remarkable effect that it does not generate abnormal noise or wear .

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a lock mechanism according to the present invention.

FIG. 2 is a sectional view of the same lid closed state.

FIG. 3 is a sectional view showing a state during a lid opening operation.

FIG. 4 is a partially cutaway front view of the locking mechanism of the present invention.

FIG. 5 is a partial plan view of the mechanism mounting portion of the present invention.

Claims (4)

[Scope of utility model registration request] 1. A peripheral edge of the back surface of a lid body, which has a protruding edge 3 protruding inwardly inside an opening of a frame body 2 closed by the lid body 1, and a hook member 4 engageable with the protruding edge 3. a underground construction lock mechanism having a configuration including a part, an opening 5 placing insert the lid opening tooling on the periphery of the lid 1 provided swingable lid rear surface of the inner than the opening 5 The operating body 6 is pivotally supported on the operating body 6, and the operating body 6 is provided with a closing piece 8 for closing the opening 5 at an end portion outside and above the swinging support shaft 7, and a closing piece for closing the opening 5 is provided. The urging member 9 for urging
The suspension member 10 is provided inward and downward, and the suspension member 10 is swingably supported on the back surface of the lid body outside the support shaft 7 of the operating body 6,
The hook member 4 that can be engaged with the protruding edge 3 suspends the hook member 10.
Is provided outside of, and the closing piece 8 closes the opening 5.
And also the hook member 4 is engaged with the protruding edge 3
In order to remove the hook member 4 from the projecting edge 3 by pushing the closing piece 8 , the operating member 6 is provided with a contactable protrusion 11 so that the hooking member 4 does not contact.
On the other hand, a lock mechanism for an underground structure, wherein a sliding surface 12 capable of sliding contact with the protrusion 11 is provided on the suspension member 10. 2. The projecting edge 3 has a portion that comes into contact with the rotation locus of the closing piece 8 of the operating body 6, and the notched portion is a cutout 13 that is cut off. Locking mechanism for underground structures. 3. The suspension member 10 is pivotally supported on the lid 1 by left and right supporting shafts 15, and the supporting shafts 15, 1 are provided.
The underground structure lock mechanism according to claim 1, wherein the operating body 6 is interposed between the two 5 and is formed in an inverted gate shape that provides a rotatable space 14. 4. The underground structure locking mechanism according to claim 2, wherein the hook members 4 are provided separately on the left and right sides of the void 14 formed in the suspension member 10.