JPH0715880Y2 - Locking device for underground structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a locking device for a lid of an underground structure such as a manhole.

(Prior Art) Examples of this type of device include, for example, Jpn.
Various mechanisms such as -20674 and 60-20675 have been developed. These conventionally known locking mechanisms include a locking member provided on the lid.
It is to be engaged with the inner edge of the frame body, and when the lid is opened, the lock member must be directly or indirectly operated from the outside to unlock. Further, in order to enable operation from the outside, a small opening must always be provided in the operation part of the lid.

(Technical problem) Therefore, in the conventional lock mechanism, it is necessary to perform the unlocking operation and the lid opening operation at the same time. This series of operations requires some skill and familiarity. On the other hand, the mechanism that can be unlocked by pushing the lock member is relatively easy to detect.
Also, through the small opening that must be provided in the lid,
There was a problem that rainwater or the like would flow into the inside or that the odor inside would leak out.

An object of the present invention is to provide an underground structure locking device having a structure that does not require simultaneous unlocking operation and lid opening operation, and therefore is difficult for a third person to open and is easy for an operator to handle. It is in.

It is also an object of the present invention to provide a lock device for an underground structure, which has a lid having a closed structure that does not require a small opening that enables an operation from the outside.

(Technical Means) The above-mentioned purpose is an engaging member in which a supporting shaft 2 is suspended by a support shaft 2 so as to be swingable at least inwardly at an edge portion of a lower surface of a lid body 1, and an outwardly facing hook 3 is provided at a swinging end thereof. 4, an engaging edge 6 provided inside the opening 15 of the frame body 5 for receiving the lid body 1 and engageable with the hook 3, and the lid body 1 is rotated to hook the engaging member 4. 3 is moved from the engaging position A with the engaging edge 6 to the unlocking position B and the hinge fitting pivotally supported by the lid 1.
12 can be inserted and the hinge member 12 is located when the engaging member 4 is in the engaging position A, to the closing position I along the opening edge of the frame and the unlocking position B of the engaging member 4. In order to enable the movement of the lid, a position II when the hinge fitting 12 is unlocked, which is set to the side of the closed position I, and a position III inside the frame where the hinge fitting 12 is located when the lid is inverted. A hinge mechanism 11 having a metal fitting receiving port 14 through which the hinge metal fitting 12 can move at each of these positions.
It is achieved by the composition of and.

The unlocking means 7 puts the engaging member 4 into the unlocked state by the rotation operation of the lid body 1, and therefore enables the opening operation after unlocking.

Further, the locking portion 18 provided on the lid body 1 is only required to be able to rotate the lid body 1 by locking the lid opening tool T, and since it is not necessary to directly operate the engaging member 4, it has a bag-like shape. It may be a non-penetrating structure.

(Example) In the following, with reference to the drawings, in the illustrated circular manhole, the lid body 1 is fitted into the opening 15 of the frame body 5, and opens and closes around a hinge mechanism 11 described later. An engaging member 4 is suspended by a support shaft 2 provided at the upper end of the lid 1 so as to be swingable inward and outward, at the edge of the lower surface of the lid 1 that is the farthest from the hinge mechanism. The hook 3 is provided at the swing end. Reference numeral 16 is a mounting portion of the support shaft 2, which is provided below the edge portion of the lid 1. The portion provided with the support shaft attachment portion 16 is in the shape of a blind hole, and the upper portion thereof is an insertion opening 17 which is opened only on the front surface side of the lid, and the periphery of the insertion opening 17 can be locked by the lid opening tool T. The locking portion 18 is formed.

The engaging edge 6 is provided so as to project relatively inward from the frame opening 15, and is above the hook 3 in the suspended state, and the hook 3 engages when the lid 1 is pulled up as it is. .
3a is a lower end portion of the hook portion 3, and when it hits the engaging edge 6 when the lid is closed, the engaging member 4 is retracted inward. The unlocking means 7 for unlocking the engaging member 4 without operating the unlocking position is located in the unlocking position in the circumferential direction from the side of the engaging edge 6, that is, the engaging position A where the hook 3 is engaged. It is provided in B.

As shown in FIGS. 3 to 6 and 7 to 10, the first example of the unlocking means 7 is located below the engaging edge 6 of the frame body 5 in the unlocking position B. It is the cam projection 8 provided in a protruding manner, and when the lid 1 is rotated from the engagement position A to the unlocking position B,
It has a slope 20 that pushes the hook 3 inward.

A second example of the unlocking means 7 is, as shown in FIGS. 11 to 14, a notch 9 formed in the engaging edge 6 at the unlocking position B through which the hook 3 can pass. Is.

In order to rotate the lid 1 from the engagement position A to the unlocking position B and stop it, the lid 1 is attached to the frame body so as to be swingable right and left by the above-mentioned hinge mechanism 11 (Fig. 15). See Figure 17). The hinge mechanism 11 is an engaging member 4 of the lid.
Hinges supported by a pivot 21 on the lower circle on the opposite side
12 and a retaining ring 13 formed inside the opening of the frame body 5 for mounting the hinge 12, and the hinge fitting 12 is inserted and locked in the fitting receiving opening 14 of the retaining ring 13. Similar to the conventional hinge mechanism, the metal fitting receiving port 14 is formed in a slender shape in the radial direction so that the hinge metal fitting 12 can be moved inward and outward, and the hinge metal fitting 12 can be moved in the circumferential direction due to the turning down of the neck. As shown in Fig. 15, it is widely formed in the radially outer part. Therefore, the hinge 12 can move between the position I when the lid is closed, the position II when unlocked, and the position III when the lid is inverted. Reference numeral 22 is a retaining projection at the lower end of the hinge fitting, and 23 is a locking projection between the hinge fitting 12 and the frame inner edge 24. If water pressure acts on the lid body 1 from below and a force for floating the water pressure is applied, the lid body 1 may rotate. Therefore, in order to prevent this rotation, vertical walls 25 and 26 are provided on the lower surface of the inner projecting edge 24 to define the locking projection 23 at the closed position I. Reference numeral 27 denotes a concave portion formed on the lower surface of the inner projecting edge 24 for providing the hanging walls 25 and 26, and corresponds to the position I.

One or both of the lid 1 and the frame 5 as described above are appropriately provided with a mark 10 indicating the engagement position A and the unlocking position B.

(Operation) In the underground structure provided with the device of the present invention having such a configuration, when the lid body 1 is closed, the hook 3 of the engaging member 4 is located immediately below the engaging edge 6 of the frame body 5. Therefore, even if the lid 1 is lifted to open it by a normal method, the hook 3 engages with the engagement edge 6 and cannot be opened. Further, since the lock mechanism has the hinge mechanism 11, the hook 3 and the locking projection 23 of the hinge are engaged with the engaging edge 6 and the inner projecting edge 24, respectively, even when a force for pushing up the lid 1 is applied from the inside. Therefore, the lid body 1 that has been pushed up naturally does not rotate to unlock and the lid body 1 does not come off. The case where the lid 1 is pushed up may occur when the water level or the air pressure rises.

In the opening operation, first, the opening tool T is inserted into the insertion opening 17 and the tool tip hook is locked to the locking portion 18, and the lid 1 is rotated in the circumferential direction. By this rotation, the engaging member 4 is located at the unlocking position B, and as a result, in the first example, the hook 3 is pushed by the inclined surface 20 and retracts inward so as to be disengaged from the engaging edge 6 ( (FIGS. 7 to 10), and in the second example, the hook 3 has a notch 9.
To the state where it does not engage the engaging edge 6 (FIGS. 11 to 14).

Therefore, by hooking the tip hook of the lid opening tool T on the locking portion 18, the lid 1 can be slid up onto the frame body 5, and the lid 1 can be laterally displaced or raised and inverted. This completes the lid opening work. At this time, the hinge 12 moves in the direction of I, II, and III in FIG. 15 to restrict the movement of the lid 1.

When closing the lid 1, align the marks 10 and cover the opening 15 of the frame 5, and if the position is misaligned, return the lid 1 to the engaging position A and engage the hook 3 of the engaging member 4. It may be located below the joint edge 6. Since the hook lower surface 3a is curved or inclined, if it hits the engaging edge 6 during the lid closing operation, the hook lower surface 3a is pushed inward and then returned to the original state to automatically become the locked state.

(Effect) The present invention is configured as described above, and the lid 1 is closed.
First, the lid 1 can be unlocked by rotating it slightly, and then the unlocked lid 1 can be opened. Therefore, it is not necessary to open the lid while unlocking as in the conventional case, and the certainty can be ensured. In addition, since the work of rotating the lid 1 is required, it cannot be unlocked easily, and the unlocking method is difficult to understand. Furthermore, since unlocking from the locked state is performed by rotating the lid body 1, it is not necessary to provide a through hole for operating the engaging member 4, and therefore the waterproof lid body 1 is also provided. Can be applied.

[Brief description of drawings]

The drawings relate to an embodiment of the present invention. FIG. 1 is a perspective view of a manhole in which the apparatus of the present invention is implemented, FIG. 2 is a sectional view, and FIGS. 3 and 4 are plan explanatory views of the first embodiment. 5 and 6
FIG. 7 is a sectional view of the first embodiment, FIG. 7 and FIG. 8 are partial plan views showing the operation of the same, FIG. 9 and FIG. 10 are sectional views corresponding to the previous two figures, FIG. 11 and FIG. The drawing is a plan view of the second embodiment,
13 and 14 are cross-sectional views of a second embodiment corresponding to the previous two,
FIG. 15 is an explanatory plan view of the hinge fitting receiving port, FIG. 16 is a sectional view of the same, and FIG. 17 is a sectional view taken along line XVII-XVII of FIG. 1 ... Lid, 2 ... Spindle, 3 ... Hook, 4 ... Engaging member, 5 ... Frame, 6 ... Engaging edge, 7 ... Unlocking means.

Claims (7)

[Scope of utility model registration request] 1. An engaging member 4 which is suspended from a lower surface edge of a lid 1 by a support shaft 2 so as to be swingable at least inwardly, and an outward hook 3 is provided at a swing end thereof, and a lid. An engaging edge 6 provided inside the opening 15 of the frame body 5 for receiving the body 1 and capable of engaging with the hook 3 and the lid body 1 are rotated to engage the hook 3 of the engaging member 4. The unlocking means 7 which is moved from the engagement position A with the edge 6 to the unlocking position B, and the hinge member 12 pivotally supported by the lid 1.
Can be inserted and the hinge member 12 is located when the engaging member 4 is in the engaging position A, and the closing position I along the opening edge of the frame and the unlocking position B of the engaging member 4 In order to enable movement, the hinge metal fitting 12 is set to the side of the closed position I when the hinge metal fitting 12 is unlocked, and the hinge metal fitting 12 is located when the lid body is inverted.
It has positions III inside the frame, and each of these positions is hinged metal 12
A locking device for an underground structure, which comprises a hinge mechanism 11 having a movable metal fitting receiving port 14. 2. A lid 1 for locking a lid opening tool T when unlocking.
The locking portion 18 provided at the outer surface is formed in a bag shape with respect to the outside, and the lid body 1 is configured to seal the opening 15.
The locking device for an underground structure according to the item. 3. The underground structure according to claim 1, wherein the unlocking means 7 is a cam projection 8 provided on the lower side of the engagement edge 6 so as to project to the same extent or more as the engagement edge. Lock device. 4. The underground structure locking device according to claim 1, wherein the unlocking means 7 is a notch 9 formed on the side of the engaging edge 6 through which the hook 3 can pass. 5. The underground structure locking device according to claim 1, wherein one or both of the lid body 1 and the frame body 5 are provided with a mark 10 indicating an engaging position and an unlocking position. 6. The lid body 1 is attached to a frame body 5 by a hinge mechanism 11 so as to be swingable right and left, and an engaging member 4 is suspended substantially opposite to the mechanism body 11. The locking device for an underground structure according to the item. 7. A hinge mechanism (11) comprises a hinge member (12) pivotally supported on the lower surface of the lid body, and a retaining ring (13) formed inside the opening of the frame body (5) for receiving it, and the retaining ring (13) is Hinge bracket 12
7. The underground structure locking device according to claim 6, which has a wide metal fitting receiving port 14 that enables the peripheral movement of the lock.