JPH0640680Y2 - Cover frame structure for underground structures - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Use The present invention relates to a lid frame structure for an underground structure, and more specifically to a frame of an iron lid such as a manhole iron lid, a fire hydrant iron lid, and a water meter iron lid. Regarding opening and closing structure.

(B) Conventional Technology As an example of a conventional lid frame structure for an underground structure of this type, there is one described in Japanese Utility Model Publication No. 57-58296.

That is, the frame structure for an underground structure described in this publication basically has a lid, a frame that supports the lid, and a seat that has a locking hole that projects from the inside of the frame. With a rod shape, its upper part is swingably attached to the edge of the lid,
The trunk part is inserted in the catch hole of the seat so that it can move up and down and pivotally, and the lower part consists of the connecting rod that is in abutting engagement with the seat, so that the lid can be opened by horizontal rotation or vertical inversion. It is configured.

The lid body is provided with a pair of plate-shaped ribs facing each other on its lower surface, and an L-shaped notch groove (a horizontal groove and an inclined groove opened downward from the horizontal portion to be released from the horizontal groove) is provided on the facing surface of these ribs. On the other hand, the connecting rod is provided with a pair of pins projecting in the back direction on the upper part thereof, and these pins are detachably engaged with the L-shaped notch groove to attach the connecting rod to the lid body. Is pivoted to.

Also, as a structural example similar to this lid frame structure for underground structures,
Examples thereof include the structures described in Japanese Utility Model Publication No. 61-152051 and Japanese Utility Model Publication No. 59-20438.

On the other hand, in the structure disclosed in Japanese Utility Model Laid-Open No. 64-10556, a pair of plate-shaped ribs formed on the lower surface of the lid body face one another.
A pair of protrusions are formed, and U-shaped ribs engaging with the protrusions are formed on both side surfaces of the connecting rod to pivotally support the connecting rod on the lid.

(C) Problems to be solved by the invention However, the one described in the above-mentioned Japanese Utility Model Publication No. 57-58296 is
The lid and the connecting rod are easily disconnected from each other, and especially during heavy rainfall or snow thunder, the water flow in the pipeline of the underground structure becomes rapid, or the water pressure increases, causing turbulent flow from below to the connecting rod and the lid. There was a problem that lifting pressure was applied, the connection between the connecting rod and the lid was released, and the lid jumped up.

That is, in the lid structure disclosed in Japanese Utility Model Publication No. 57-58296, the ribs of the lid are provided with opposed L-shaped notches, and the upper portion of the connecting rod is provided with pins that engage with the L-shaped notches. So
Allowing horizontal movement of the connecting rod (pin) along the horizontal part of the notch groove, and when the lid moves from that state in the opening direction, that direction approximates to the inclination direction of the inclined part of the notch groove.
The connection between the lid and the connecting rod was broken. The horizontal movement of the connecting rod and the tilted movement of the lid as described above can occur normally, and it is particularly unavoidable in the case of heavy rain or snowstorm as described above. The loss of the stick was a problem.

In fact, in the configuration described in Japanese Utility Model Publication No. 61-152051, the special stopper is attached to the notch groove of the lid body to prevent the lid body from being separated from the connecting rod. In the configuration described in -20438 publication, the nut is mounted across the notch groove of the lid body to prevent the lid body from being separated from the connecting rod in the same manner, and in any case, the separation of the lid body from the connecting rod is complicated. It is prevented by the composition.

Of course, even in the configuration described in Japanese Utility Model Laid-Open No. 64-10556, since there is a high possibility that the lid will separate from the connecting rod due to the horizontal movement of the lid, a pin for preventing separation is required for the connecting rod.

(D) Means and Actions for Solving the Problem The present invention is an openable underground structure lid frame structure, in which a lid body extends downward from a lower surface of the lid body and is provided in a pair. -Shaped ribs and a pair of projections that project from the facing surfaces of these ribs so as to face each other, while the connecting rod has a pair of sliding surfaces that slide on the upper surface of the connecting rods, respectively. And a substantially horizontal groove and an inclined groove that inclines downward from the horizontal groove and is opened on each of the sliding surfaces thereof, and the pair of projections is detachably attached to each horizontal groove via each inclined groove. Is a lid frame structure for an underground structure which is connected to the lid body by pivotally supporting the connecting rod.

That is, according to this invention, a pair of plate-like ribs formed on the lower surface of the lid body are formed with protrusions, not grooves, and grooves are formed on both side surfaces of the connecting rod so as to engage with the protrusions. Moreover, the groove is not simply formed by a substantially U-shaped rib,
The main structural feature is that the groove is formed by a horizontal groove and an inclined groove that is inclined downward from the horizontal groove and is opened.

The present invention, due to these characteristics, prevents the lid body from being separated from the connecting rod unless the lid body is tilted downward from the horizontal direction. Of course, various movements of the lid (lifting, horizontal movement, rotation movement)
Since it is almost unlikely that such a tilted movement from the horizontal direction to the lower side is possible, it is possible to sufficiently prevent the separation of the lid body and the connecting rod, and in particular, this separation prevention is possible by a simple structure.

In this invention, the connecting rod (substantially L-shaped groove) formed of the horizontal groove and the inclined groove, which is formed in the connecting rod, is opened only at the lower end portion of the inclined groove, and is formed in the rib of the lid from this open portion. The protrusion is inserted. The inclination angle of the inclined groove is 100 to 160 °
Is preferred, and 110 to 150 ° is more preferred.

(E) Embodiment Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings.
The invention is not limited to this.

First, in FIG. 1, a lid frame structure 1 for underground structure (gate valve) is provided with a lid body 2, a frame body 3 supporting the lid body, and a locking hole 4 projectingly provided inside the frame body. It is mainly composed of a receiving seat 5 having a and a connecting rod 6. The connecting rod 6 has its upper portion swingably attached to the edge portion of the lid body 2, the trunk portion vertically inserted into the locking hole 4 of the receiving seat 5 and rotatable, and the lower portion of the connecting rod 6 And abuttingly engages with the frame body 3, thereby allowing the lid body 2 to be opened with respect to the frame body 3 by horizontal rotation or vertical inversion.

In particular, the lid body 2 has a pair of plate-shaped ribs 7 and 8 extending downward from the lower surface of the lid body 2 and facing each other, and a connecting rib 9 for connecting one side ends of these ribs. And a pair of truncated cone-shaped projections 10 and 11 that project from the facing surfaces of the ribs 7 and 8 so as to face each other.

On the other hand, in particular, in FIG. 6, the connecting rod 6 has a pair of sliding surfaces 12, 12 on its upper part, which slide with the facing surfaces of the ribs 7, 8, respectively.
13 and each of their sliding surfaces has a substantially horizontal horizontal groove
14 and an inclined groove 15 that is inclined downward from the horizontal groove 14 and is opened (opening port 18) are formed in series to form a substantially L-shaped groove 16. A stopper 17 is formed at the lower end of the connecting rod 6. Then, as shown in FIG. 5, the connecting rod 6 is laid on the conical projections 10 and 11 provided on the lower surface of the lid 2 [see FIG. Slide the rod 6 into the horizontal groove 14 and return the connecting rod 6 to the vertical position [see (B) in FIG. 5].
Stands still in the freely suspended state [see (C) of FIG. 5].

After connecting the lid 2 and the connecting rod 6 as described above, the lower end of the connecting rod 6 is inserted into the locking hole 4 of the receiving seat 5 provided inside the frame 3 [see (A) of FIG. 8]. The stopper 17 is attached to the stopper 3 so that the stopper 17 abuts against the seat 5 and does not come off even if the connecting rod 6 is pulled 90 ° together with the cover 2 and pulled upward [(B) in FIG. 8].
reference]. The lid body 2, the connecting rod 6 and the frame body 3 are combined to form the lid body 2
The state shown in FIG. Therefore, even if the connecting rod 6 is pushed from below, the end of the head of the connecting rod 6 hits the slope of the fitting portion of the receiving frame main body with the lid 2, so that the lid 2 and the connecting rod 6 separate. There is no. Further, even if a force such as lifting, horizontal movement, and rotational movement is applied to the lid body 2,
Since there is almost no movement inclining downward from the horizontal direction along the substantially L-shaped groove 16, the separation between the lid body 2 and the connecting rod 6 can be prevented after all. Even if the lid body 2 is rotated 180 ° and is opened as shown in FIG. 2, when the lid body 2 horizontally moves to the right in FIG. 2, the closed end of the horizontal groove 14 of the connecting rod 6 becomes a frame body. Even if it abuts on the plate 3 and moves horizontally to the left, the outer peripheral end of the lid 2 abuts on the bent recess 19 of the connecting rod 6 and the connection between the two is not released.

Unlike the above embodiment, an elliptical groove having a large diameter as shown in FIG. 11 is provided in the vicinity of the closed end of the horizontal groove provided in the connecting rod.
20a may be formed. With this elliptical groove 20a, the lid 2
The protrusions 10a, 11a formed on the plate-shaped ribs 7a, 8a of the lid are prevented from relatively moving horizontally in the horizontal groove 14a of the connecting rod 6a, and the lid 2
The separation between a and the connecting rod 6a is surely prevented.

(F) Effect of the Invention According to this invention, a pair of plate-shaped ribs formed on the lower surface of the lid body are formed with protrusions so as to face each other, and on both side surfaces of the connecting rod,
A horizontal groove that engages with the protrusions is formed continuously with the inclined groove so that the lid does not separate from the connecting rod unless the lid is tilted downward from the horizontal with respect to the connecting rod. With a simple structure, it is possible to prevent the separation of the two.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention, FIG. 2 is a vertical sectional view of an essential part showing a state in which the lid is opened, and FIG. 3 is a state in which the lid and a connecting rod are combined. 4A is a partial vertical cross-sectional view of the lid, FIG. 4B is a partial bottom view of the lid, and FIG. 5 is a view showing the connection between the lid and the connecting rod. FIG. 6 is a side view of the connecting rod, FIG. 7 is a perspective view of the connecting rod, and FIG. 8 is an explanatory view for explaining the alternate method of connecting the frame body and the connecting rod. FIG. 9 is a longitudinal sectional view of an essential part showing another embodiment, FIG. 10 is a view corresponding to FIG. 2 showing a state in which the lid is opened, and FIG. 11 is a view corresponding to FIG. 1 ... Underground structure lid frame structure, 2 ... Lid body, 3 ... Frame body, 4 ... Locking hole, 5 ... Seat, 6 ... Connecting rod, 7,8 ... Plate rib , 10, 11 ...... Conical protrusion, 14 ...... Horizontal groove, 15 ...... Inclined groove, 16 ...... Approximately L-shaped groove, 17 ...... Stopper.

Claims (1)

[Scope of utility model registration request] 1. A lid, a frame for supporting the lid, a seat having a locking hole protruding from the inside of the frame, and a rod-shaped member.
The upper part is swingably attached to the edge part of the lid, and the trunk part is vertically movably and pivotally inserted into the locking hole of the seat.
A lid frame structure for an underground structure, the lower portion of which includes a receiving rod and a connecting rod that is in abutting engagement with the lid body, and the lid body can be opened by horizontally turning or vertically reversing, and the lid body extends downward from the lower surface thereof. 1 provided facing each other
A pair of plate-like ribs and a pair of protrusions that project from the facing surfaces of these ribs to face each other are provided. On the other hand, the connecting rod has a pair of projections that slide on the facing surfaces of the ribs. A sliding surface is provided, and a substantially horizontal groove and an inclined groove that inclines downward from the horizontal groove and opens are formed on each of the sliding surfaces, and the pair of protrusions can be attached and detached through the inclined grooves. A lid frame structure for an underground structure which is engaged in each horizontal groove, and thereby a connecting rod is pivotally supported by the lid.