JP2895740B2 - Underground structure lid fixing structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing structure of a cover for an underground structure, and more particularly to a fixing structure for preventing a cover main body opened at a predetermined inclination angle from falling toward an opening.

The term "cover for underground structures" as used in the specification of the present application means a large iron cover, a manhole cover, and a sewage basin cover for closing an opening that passes between an underground buried structure, an underground structure facility, and the like, and the ground. , Openable and closable iron covers for underground facilities and wiring in power and communications, iron covers for power transmission,
Distribution for iron lid, hydrant lid having a function as a door connecting the buried conduit and its accessories and the ground under the road surface in the water supply and the gas pipe, gate valve lid, specifications Setsuben lid, air valve cover, gas pipe Covers, water meter covers, etc. shall be generically referred to.

[0003]

2. Description of the Related Art A lid for various underground structures is opened and closed by connecting a lid body by a hinge to a receiving frame installed with its upper surface facing the ground and turning the lid vertically or horizontally. What we can do is its basic structure. Then, the apparatus having the vertical inversion, which the closing work in order to facilitate opening capped were lid body is additionally provided a fixed structure for holding in an upright state so as not to fall on the opening side Has been widely used.

[0004] As such a fixing structure of the lid body, for example, there is a structure described in Japanese Utility Model Publication No. 3-55641.

[0005] In this fixing structure, a support rod is slidably provided on the back surface of the lid body, and when the lid is opened, the support rod is slid and inserted into a hole formed in the inner peripheral surface of the receiving frame. The structure is such that the cover body does not fall in the closing direction, and the cover body can be stably supported.

[0006]

However, in this fixing structure, it is necessary to make the diameter of the hole substantially equal to the diameter of the support rod in order to eliminate the wobble of the lid body maintained at a predetermined angle. Therefore, in fixing the lid body, the support rod must be inserted while finely adjusting the inclination angle of the lid body by hand, and the insertion work becomes troublesome. Moreover, since the lid body is a heavy object of about 40 kg to 80 kg,
Inserting the support rod into the hole in an inclined and unstable state involves considerable danger.

In order to solve such a problem, there is a fixing structure disclosed in Japanese Utility Model Laid-Open No. 5-22641 proposed by the present applicant. This is provided with a lid support on the hinge receiving side of the receiving frame so as to be able to swing up and down, and to prevent the opened lid body from falling down in the closing direction, raise the lid support upright. The locking state can be set to the receiving frame, and the lower end of the lid main body rotating in the closing direction is abutted against the lid support to prevent the lid from falling down.

With such a structure, it is only necessary to set the posture of the lid support, so that the operation can be easily performed by one operator as compared with the structure of the prior art.

However, when the lid main body is rotated in the closing direction, the locking projection comes into contact with the bottom of the burl hole and the main body comes into contact with the lower surface of the lid main body. This is to prevent the lid body from falling down.

Since the lid body is prevented from falling with such a configuration, there is a possibility that the lid support and the receiving frame may be damaged.

The problem to be solved in the present invention is to provide a fixing structure in which the operation for maintaining the standing posture of the lid body opened at a predetermined inclination angle is simple and the retention is reliably maintained. is there.

[0012]

SUMMARY OF THE INVENTION A cover for an underground structure according to the present invention.
The fixing structure is formed on the inner surface of the receiving frame, in a lid for an underground structure, wherein the lid body connected so as to be openable and closable in the vertical inversion direction with respect to the receiving frame is raised at a predetermined inclination angle when opened. Is related to the opening / closing operation of the lid body
Lid and lid support that is not raised or lowered capable articulated, said restraint seat of the the lower surface of the lid body cover support is only set and an engaging-detachable engagement seat, the lid support which is raised Along the standing surface of the main unit
The lid support is fixed in the upright position when lowered
At the same time, the restraint seat of the lid support engages with the engagement seat,
Raise the fixed lid support along the upright surface of the lid body.
When the lid support is released from the upright fixed state.
Wherein the restraining seat of the lid support is disengaged from the engaging seat.
Characterized in that it was.

Further, by moving parallel to <br/> lateral direction I along the lid support the rising surface of the lid body can be engaged and disengaged with the engaging seat formed on the lower surface of the cover body .

[0014]

A lid support for holding the opened lid body in an upright posture at a predetermined inclination angle is fixedly disposed on a mounting seat formed on the inner surface of the receiving frame, and the lid body and the lid support are provided. By mechanically engaging, the restraining force against the fall of the lid body can be obtained. Then, this engagement can be carried out by engaging the engagement seat of the cover body by translating the lid support in the vertical direction or the lateral direction I along the orientation of the lid body.

[0015]

FIG. 1 is a longitudinal sectional view of a cover for an underground structure showing one embodiment of the present invention, and FIG. 2 is a plan view showing a part of a receiving frame.

In the drawing, a receiving frame 1 has a rectangular planar shape and is divided into a plurality of sections by laying a beam 1a at the center thereof.
And are fitted and supported. The lid body 2 is
The outer peripheral surface 2a of the lid main body 2 and the lid main body 2 are formed by a fitting surface 1b formed on the inner circumference of the receiving frame 1 and a fitting projection 4b described later.
The inner peripheral taper 2b formed on the lower surface of the pair is fitted and supported by facing each other. Each of these lid bodies 2 is connected to the receiving frame 1 by two hinge hardware 3, and the lid body 2 is vertically inverted by a hinge structure using these hinge hardware 3 as in the conventional structure. It can be opened and closed.

The hinge fitting 3 is inserted through a hole 4a formed in a hinge seat 4 formed along the inner wall of the receiving frame 1 as shown in FIG. Then, as shown in FIG. 3, a pin 3 a integrally formed on the side surface of the upper end portion of the hinge hardware 3 is attached to the lid body 2.
Is connected to the lower surface of the pin so as to be rotatable around the axis of the pin 3a,
A locking portion 3 b is provided at the lower end so that it can be abutted against the lower surface of the hinge seat 4.

By providing such a hinge hardware 3, when the lid body 2 is opened, the upper surface side of the lid body 2 is provided with a fitting projection 4b provided on a hinge seat 4, as shown in FIG.
At the same time, the locking portion 3b engages with the lower surface of the hinge seat 4, and the outer peripheral portion of the lower surface of the lid body 2 comes into contact with the hinge hardware 3, so that the lid body 2 is opened and set to a standing position at a predetermined angle. can do.

In order to hold the cover body 2 so that it does not fall to the receiving frame 1 side when opened, two cover supports 5 are provided for each cover body 2. These lid supports 5 are shown in FIG.
As shown in FIG. 5, the hinged seat 4 is used to be connected so as to be swingable in the vertical direction. FIG. 1 is a longitudinal sectional view of the connecting structure of FIG.

The lid support 5 has a shape in which a base end connected to the receiving frame 1 is bent upward, and a connecting pin 5a is integrally provided on a side surface of the base end. As is clear from FIG. 5, these connecting pins 5a extend in the longitudinal direction of the lid support 5 in a side view.
In a natural state where a load is not applied, the lid support 5 is held in a posture in which its long axis is substantially horizontal as shown in the figure by its own weight in a natural state where no load is applied.

A restraining seat 5b is provided on the top end side of the lid supporting member 5 for engaging the lid body 2 in the upright posture at four points and restraining the same. These restraining seats 5b are provided on both side surfaces of a spacer 5c protruding in the same direction as the base end side of the lid support 5 and have a substantially trapezoidal vertical cross-sectional shape with a chamfered corner.

On the lower surface of the hinge seat 4 of the receiving frame 1, there is provided a mounting seat 6 into which the base end of the lid support 5 is inserted and which is rotatably held. The mounting seat 6 is provided with a pair of holding ribs 6a which protrudes downward from the hinge seat 4, the hinge seat 4 of the portion sandwiched by these retention ribs 6a
A notch 6b is provided for allowing the lid support 5 to rotate in the vertical direction.

The connecting holes 6 for rotatably holding the connecting pins 5a of the lid supporter 5 are provided on the opposite surfaces of the holding ribs 6a, 6a.
with recessing the c, incising introducing notches 6d to incorporate an articulated pin 5a in the connecting holes 6c in a substantially horizontal direction. A lock groove 6e is provided in the direction from the connecting hole 6c toward the center of the receiving frame 1 and obliquely downward. The connecting pin 5a having an oblong vertical cross section is dropped into the lock groove 6e, and its rotation is performed. Can be regulated.

The connecting pin 5 inserted into the connecting hole 6c
5, a retaining bolt 6f is screwed into the introduction notch 6d of the holding rib 6a from the inner surface side as shown in FIG. 5, and the connecting pin 5a is restrained by its head.

The connecting pin 5a and a part of the lock groove 6e are formed in a stepped shape. However, the connecting pin 5a and the lock groove 6e are formed in a stepped shape in order to reinforce a lower portion of the holding rib 6a. .

The lower surface of the lid body 2 is provided with engagement seats 7 and 8 which can be engaged with the restraint seat 5b of the lid support 5 when the lid body 2 is opened and raised at a predetermined angle. The engagement seats 7 and 8 correspond to FIG.
As shown in detail in FIG.
Pressure receiving seat 7a in which two engaging seats 7 (8) arranged opposite to each other are bent in an L-shape at the end of the surface facing each other.
(8a). The interval between the two engagement seats 7 and 8 is set to two restraining seats 5b of the lid support.
It is almost equal to the distance between each other.

In the above configuration, the procedure of fixing the lid main body 2 by the lid support 5 is as follows.

[0028] As described in FIG. 3, the lid body 2 is erected a hinge fittings 3 as a rotation center. Since this lid opening operation is performed independently of the lid support 5, the lid support 5 remains stationary with respect to the receiving frame 1 as shown by the dashed line in FIG.

Note that the lid main body 2 erected at a predetermined angle is
As shown in FIG. 3, the fitting projection 4b abuts against the lower surface engagement portion 3b of the hinge fittings 3 hinge seat 4 with receiving a top side of the lid body 2, a predetermined inclination by restriction by these
Maintained at an oblique angle . If necessary, the space between the ground side and the central portion on the upper surface side of the lid main body 2 may be supported by a burl-shaped thing.

When the lid body 2 is opened, the lid support 5 faces outward as shown in FIG. 2, and is raised around the connecting pin 5a as shown in FIG. 7B. And the lid support 5
Is turned until the restraint seat 5b of FIG.
The series of restraining seats 5b extend above the engaging seats 7 and 8, respectively. At this time, the connecting pin 5a having an oblong vertical cross section takes a posture such that its long side can be inserted into the lock groove 6e of the mounting seat 6.

Next, by pulling down the lid support 5 in the direction of the arrow in the figure, the connecting pin 5a enters the lock groove 6e, and at the same time, the restraining seat 5b is inserted into the engaging seats 7, 8. The upright holding state shown in FIG. 8 is obtained. At this time, since the connecting pin 5a of the lid supporter 5 is restrained by the lock groove 6e, the rotation around the connecting pin 5a is restricted, and the lid support 5 is fixed to the receiving frame 1. In addition, restraint seat 5b
Is sandwiched between the lower surface of the lid body 2 and the pressure receiving seats 7a and 8a,
The receiving frame 1, the lid support 5, and the lid main body 2 are integrated to restrict the lid main body 2 from rotating in the left-right direction in FIG. 8.

As described above, the lid body 2 is opened and
After standing up to the angle of inclination , the lid support 5 is turned and the
The b is rotated until it comes into contact with the back surface of the lid main body 2 and then simply lowered to simply hold the erect posture, thereby ensuring the safety of work.

When closing the lid body 2, contrary to the previous operation, the lid supporter 5 is moved upward in FIG. 8 and the connecting pin 5a is pulled out from the lock groove 6e. At the same time, the restraint seat 5b comes out of the engagement seats 7, 8, so that
The lid support 5 is free with respect to the lid body 2. Therefore, after returning the lid support 5 to the posture of FIG. 5, the lid main body 2 is rotated in the lid closing direction to cover the receiving frame 1, thereby completing a series of lid closing operations.

[0034]

[0035]

[0036]

FIG. 9 is a schematic exploded perspective view showing another example of the connection structure between the lid support 12 and its receiving frame 1 and the lid main body 2. As shown in FIG.

The lid support 12 in this example is provided with connecting pins 12a having a circular vertical cross-section at both ends in the width direction at the base end thereof, and has a restraining seat 12b protruding from one surface of the upper end. An engaging seat 13 into which the restraining seat 12b can be inserted is provided on the lower surface of the lid body 2. This engagement seat 1
Numeral 3 is a bag-shaped member having a concave vertical cross section from the lower surface of the lid main body 2, and restricts rotation of the lid main body 2 in the direction in which the lid main body 2 falls down by entering the restraining seat 12b.

On the other hand, the hinge seat 4 of the receiving frame 1 is provided with a recessed mounting seat 14 into which the lower end of the lid support 12 is incorporated. The mounting seat 14 has a receiving seat 14a into which one connecting pin 12a of the lid support 12 is inserted, and has a structure capable of being incorporated so that the standing lid support 12 can move in the axial direction of the connecting pin 12a. It was done. The mounting seat 14 is provided with a notch 14b so that the lid support 12 can take a horizontal position.
holding plate 14 for preventing the other of
c is fixed by bolts 14d.

At this time, the holding plate 14c is
4b is formed to have a size that leaves a restraining portion 14e having an inner surface substantially equal to the inclination angle of the opened lid main body 2. The mounting seat 14 has a recess 14
When the cover support 12 is moved in parallel to the restraining portion 14e with the recess f, the lower portion of the cover support 12 falls into the recess 14f, so that the cover support 12 is engaged with the engagement seat 13 of the cover body 2. The return of the rear lid support 12 is prevented.

As shown in FIG. 9 , with the lid support 12 capable of moving in the axial direction of the connecting pin 12a, the lid support 12 is brought into contact with the lid main body 2 after the lid main body 2 is erected as shown in FIG. It is raised until it touches, and the restraint seat 12b is
Operate to get inside 3 As a result, the lid support 12 is restrained by the restraining portion 14e and is engaged with the lid body 2, so that the lid body 2 can be held in its upright posture.

[0042] The lid support in each of the aforementioned embodiments, after the lid opening the lid body, open the lid and lid body come fall the closed direction
But it is capable of preventing, in the cold zone can be used lid support 5 and 12 previously described in underground structures lid for projecting snow.

The cover for the underground structure for snow throwing is a cover body 2
A large amount of snow carried by a truck is dumped into the open main body in a state in which the opening is widened by raising the main body at a predetermined inclination angle. There is a risk that the lid body 2 or the like may be damaged when trying to rotate in the direction, or the lid body 2 may rotate in the closing direction due to the reaction. Therefore, by using the lid supports 5 and 12 described in the above embodiment, the lid supports 5 and 12 made non-rotatable with the receiving frame 1 and the lid body 2 are engaged, and the lid body 2 is inclined at a predetermined angle. Can be held at an angle,
It is possible to prevent the lid main body 2 from being damaged, rotating in the lid closing direction, and the like.

[0044] Toyuki this time, the rib formed vertically and horizontally on the center of the lid body 2 the lower surface, as shown in FIG. 1 0, by fixing the cover 15 by a bolt 15a, the lower surface of the cover body 2 becomes flat Sometimes, the snow hitting the lid body 2 slides down smoothly into the opening, and the load on the lid body 2 can be reduced.

Although the embodiments have been described based on the present invention, the lid body is fitted and supported by the fitting surface and the fitting projection of the receiving frame, but may be supported only by the fitting surface. . At this time, when the opened lid body is held at a predetermined inclination angle, the upper surface of the lid body comes into contact with a part of the fitting surface of the receiving frame.

The lid support is not limited to the above embodiment as long as it is non-rotatably restrained by the receiving frame and is engaged with the lid body.

[0047]

According to the fixing structure of the lid for an underground structure of the present invention, the lid support is fixed in an upright state and the lid is fixed.
The restraining seat of the support tool is engaged with the engaging seat of the lid body that is opened at a predetermined angle.
Engaged, the lid support, the lid body and receiving frame that integrally preparative ing
Thus, the lid body can be reliably held at that angle.

Further, the lid support can be fixed to the receiving frame only by moving the lid support up and down or right and left with respect to the upright surface of the lid main body opened at a predetermined inclination angle.
In addition to the above, the engagement with the lid body can be easily performed, and the engagement can be ensured.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a lid for an underground structure to which a fixing structure of the present invention is applied.

FIG. 2 is a plan view showing a part of a receiving frame.

FIG. 3 is a longitudinal sectional view of a main part showing a situation when a lid main body is opened together with a hinge hardware.

FIG. 4 is an exploded perspective view showing main parts of a lid support, a receiving frame, and a lid main body.

FIG. 5 is a longitudinal sectional view of a main part showing a connection structure between a lid support and a receiving frame.

FIG. 6 is a view showing a main part of a lid main body, and FIG.
2 is a bottom view, and FIG. 2B is a longitudinal sectional view taken along line AA of FIG.

FIGS. 7A and 7B are diagrams showing an operation procedure of the lid supporter, wherein FIG. 7A shows a state in which the lid main body is erected, and FIG. The situation set in is shown.

FIG. 8 is a vertical cross-sectional view of a main part showing the restriction of the lid main body by the lid support.

FIG. 9 shows another example of the structure of the lid support , the connection structure with the receiving frame, and the like.
FIG. 6 is an exploded perspective view of a main part showing a structure for connecting to a cover main body .

FIG. 10 shows the use of a lid support as a lid for an underground structure for snow throwing.
The lid body lower surface of Rutoki is shown to oblique plan view.

[Explanation of symbols]

1 receiving frame 2 lid body 3 hinge fittings 4 hinge seat 5 cover support 6 attachment seat 7 Kakarigoza 8 engages seat 1 second lid support 13 Kakarigoza 14 mounting seat 15 cover

Claims (2)

(57) [Claims] 1. A cover for an underground structure, wherein a lid body connected so as to be openable and closable in a vertically inverted direction with respect to a receiving frame is formed on an inner surface of the receiving frame in a lid for an underground structure which stands up at a predetermined inclination angle when opened. Is related to the opening / closing operation of the lid body
Lid and lid support that is not raised or lowered capable articulated, said restraint seat of the the lower surface of the lid body cover support is only set and an engaging-detachable engagement seat, the lid support which is raised Along the standing surface of the main unit
The lid support is fixed in the upright position when lowered
At the same time, the restraint seat of the lid support engages with the engagement seat,
Raise the fixed lid support along the upright surface of the lid body.
When the lid support is released from the upright fixed state.
Wherein the restraining seat of the lid support is disengaged from the engaging seat.
Fixing structure of underground structures lid, characterized in that it has. 2. The door can be opened and closed in a direction perpendicular to the receiving frame.
When the lid body is opened, the lid body
The lid for underground structures standing upright
The mounting seat formed on the inner surface of the frame is related to the opening / closing operation of the lid body
A lid support that is connected so that it can be turned upside down,
An engagement seat on which a restraining seat of the lid support can be engaged and disengaged;
The lid support that has been erected is located along the upright surface of the lid body.
Is translated in one of the left and right directions.
The lid support is fixed in the upright position and the lid support
The restraint seat of the tool is engaged with the engagement seat, and the lid support in the upright fixed state.
Move the holder along the upright surface of the lid body in the direction opposite to the parallel movement.
When the lid is moved parallel to
And the restraint seat of the lid support is released from the engagement seat
A structure for fixing a lid for an underground structure , characterized in that the structure is configured as follows .