JPH0369724A - Cover for underground structure - Google Patents

Abstract

PURPOSE:To enable opening or closing work to be executed with light labor even in a narrow place by connecting a cover main body to a bearing frame with a mechanical mechanism, to enable moving, ascending, and descending working to cover opening and cover closing to be performed at the same time, and by composing the cover main-body which can be linearly moved on the surface of ground. CONSTITUTION:A connecting rod 5 is connected to the internal section of a bearing frame 1 via a swing element 6, to be swung and to be tilted, and in order to promote the tilting, a guide 7 with an inclined surface is set, and the rod 5 is permitted to slide on the guide. The tip of the connecting rod 5 is fitted on a cover main-body 2 via a continuous contact shaft 8 functioning in the same manner as a universal joint. In this case, by moving the cover main-body 2 in the direction to be separated from the bearing frame 1, the level of the cover main-body 2 is almost linearly heightened, and at the same time, the body 2 is opened, and on the contrary, by pushing the cover to the side of the bearing frame, the cover is closed. As a result, also in case of the underground structure of a large type, opening and closing work can be certainly executed with light labor.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a lid frame connection structure for an underground structure lid, in which a lid main body and a receiving frame of the underground structure lid are connected in an openable and closable manner.

In addition, the underground structure cover referred to in this specification refers to a large iron cover that closes an opening connecting underground objects or underground structural facilities in a sewer system with the above ground, a manhole cover, a sewage basin cover, and a cover for electric power/communications. An openable and closable iron cover for communal ditches that protects underground facility equipment, wiring, etc.

Iron lids for power transmission, iron lids for power distribution, fire hydrant lids, water control valve lids, gate valve lids that function as opening/closing doors that connect underground conduits under the road surface for water supply and gas piping, and their auxiliary equipment to the ground;
A general term for air valve covers, gas piping covers, water meter covers, etc.

[Conventional technology]

Conventionally, as a structure in which the cover body of the cover for underground structures is connected to the receiving frame so as to be openable and closable, for example, the Utility Model Publication No. 57-5829
As described in Publication No. 6, there is a device in which a hinge is swingably attached to the lower surface of the edge of the lid body, and is inserted into a stillborn protruding from the inner circumferential wall of the receiving frame so that it can be raised and lowered.

In a lid for an underground structure using such a hinge hardware, the hinge hardware is installed using the principle of leverage by inserting a crowbar into a crow hole made in the edge of the lid body radially opposite to the position. The lid can be opened by first lifting one end of the lid body, and using the hinge as a fulcrum, flipping the lid 180 degrees vertically or rotating it horizontally 180 degrees.

[Problem to be solved by the invention]

However, in the lid opening method in which the lid body is vertically flipped 1 Bo degree, after lifting the lid body to a certain angle, the operator must step over the opening of the receiving frame and flip the lid body until it reaches the ground surface. Is required. For this reason,
Particularly in the case of lids for underground structures with large diameters, it is difficult to secure a foothold for the worker and the working posture is also unreasonable, making the work dangerous and placing a heavy burden on the worker.

On the other hand, in the method of opening the lid by rotating the lid body horizontally by 180 degrees, the operator must walk sideways over a long distance while lifting one end of the lid body, which is a heavy object. This requires a large amount of labor, and as with the inversion type, the problem of workload remains. In addition, when opening the lid, a width at least twice the diameter of the lid body is required, so it is not possible to open the lid for underground structures installed in narrow alleys etc. using this method. Can not.

Furthermore, in conventional covers for underground structures, a stillborn hole is provided on the inner circumferential wall of the receiver frame for inserting the hinge hardware.
The opening of the receiving frame is narrow, making it difficult for workers to ascend and descend.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a lid for an underground structure in which the lid body can be opened and closed simply by lifting one end of the lid body upward from a receiving frame and then moving it back and forth.

[Means to solve the problem]

In order to achieve the above object, the present invention includes a receiving frame and a lid body that opens and closes the receiving frame, the lid body is connected to the receiving frame by a mechanical connecting structure, and the connecting structure is connected to the receiving frame. It is characterized by a structure that allows the lid main body to move in the lid opening/closing direction and to move up and down at the same time.

In addition, the connecting structure includes a connecting rod whose base end is connected to the inner periphery of the receiving frame and whose distal end is connected to the lid body, and the connecting rod can rotate inside the receiving frame in the lid opening/closing direction and can move up and down. If it can be raised and lowered, the lid body can be opened and closed.

Furthermore, at the position where the connecting rod of the receiving frame is connected,
Equipped with a guide on which the bottom of the connecting rod slides,
This guide also allows the connecting rod to be raised when the lid is opened.

In addition, two separate connecting rods are provided, each of which has a long hole, and the parts containing these long holes are arranged so as to be slidably overlapped with each other, and the lid body is inserted into the long hole. A connecting structure may be used in which a connecting shaft provided on the lower surface is inserted.

Furthermore, if the overlapping surfaces of the two connecting rods are sloped so that these connecting rods can rise when moving in the lid opening direction, the lid can be opened while floating. Alternatively, a chamber may be formed that bulges outward from the inner wall of the receiving frame, and the connecting rod may be housed in the chamber. Furthermore, the connecting rod can be divided into a plurality of parts and can be bent.

[Effect]

In the present invention, the lid body and the receiving frame are provided with a connecting structure that connects them in an openable and closable manner, and the lid body is moved in a substantially horizontal direction and simultaneously raised and lowered up and down by the pivoting and raising and lowering operations of this connecting structure. If the lid body is guided so that it floats when it is moved in the direction of opening, then when an acting force is applied to the lid body in the direction of pulling it away from the receiving frame, the main body will climb over the level of the receiving frame and reach the ground surface. Move up and open the lid. Conversely, if you push the lid body toward the receiving frame from the open state, it will move while lowering its level and rest on the receiving frame to return to the closed state.

〔Example〕

Hereinafter, features of the present invention will be specifically explained with reference to embodiments shown in the drawings.

FIG. 1 is a perspective view schematically showing the lid for underground structures of the present invention;
FIG. 2 is a plan view with the lid main body removed.

The underground structure lid of this embodiment is composed of a receiving frame 1, a lid main body 2, and a connecting rod 5 that connects the receiving frame 1 and the lid main body 2. A chamber 3 bulging outward is formed at the lower part of the inner peripheral wall of the receiving frame 1, and a base 4 of a link mechanism for opening and closing the lid body 2 is installed in the chamber 3.

FIG. 3 is an enlarged perspective view of the pace 4, and FIG. 4 is an exploded perspective view of the parts.

The base 4 includes a swivel 6 for attaching the connecting rod 5 to the receiving frame 1 so as to be rotatable and tiltable, and a guide 7 for supporting the tilting of the connecting rod 5. As shown in FIG. 4, the swivel element 6 is formed into a bifurcated shape that loosely holds the base end of the connecting rod 5, and is rotatably suspended from the upper end of the chamber 3 by a support pole 5a and a nut 6b. There is. In addition, the connecting rod 5 can be rotated and rotated about the swivel 6 by aligning the hole 5a drilled at its base end with the hole 6C of the swivel 6 and fixing it with a bolt 6d and a neck 6e. It becomes possible to tilt.

On the other hand, the guide 7 is formed integrally with the bottom wall of the chamber 3, and its upper surface is formed as an inclined surface 7a that is gradually higher on the side where the connecting rod 5 moves in the lid opening direction. Therefore, when the bottom surface of the connecting rod 5 slides on the inclined surface 7a, its tilting is promoted.

The connecting rod 5 has its tip connected to the lower surface of the lid body 2 as shown in FIG.

A connecting shaft 8 is provided on the lower surface of the lid main body 2, facing directly below, and is inserted into a connecting hole 5b formed at the tip of the connecting rod 5. The inner diameter of the connecting hole 5b is formed to be somewhat larger than the outer diameter of the connecting shaft 8, and a restraining piece 8a having a hemispherical lower surface is integrally formed in the middle of the connecting shaft 8.
and a hemispherical upper surface that screws into the lower end) 8b
As a result, the upper and lower surfaces of the connecting rod 5 are restrained. This allows the connecting shaft 8 to withstand three-dimensional movements when the connecting rod 5 tilts and rotates.
functions like a universal joint and does not inhibit the movement of the members.

It is preferable that the connecting rod 5 has an arcuate shape approximately equal to the inner diameter of the receiving frame 1 having its back in the direction of opening the lid, as shown in FIG. Thereby, when the lid main body 2 is fully opened, the connecting rod 5 is accommodated in the chamber 3 and can be prevented from becoming an obstacle on the inner circumference of the receiving frame 1.

As shown in FIG. 2, when the lid main body 2 is in the closed state, the connecting rod 5 has a base end pivoted on the base 4 that is in the correct position, assuming orthogonal coordinates with the center of the receiving frame 1 as the origin O. The distal end into which the connecting shaft 8 is inserted is located on the negative X-axis. When the lid is opened, the connecting rod 5 is rotated around the base 4 by moving it on the X-axis using the point of action provided on the positive X-axis of the lid body 2. At that time, the tip of the connecting rod 5 passes from the third quadrant to the fourth quadrant to the positive
It follows an arc-shaped trajectory that reaches above ll1l.

On the other hand, since the connecting shaft 8 of the lid body 2 is rotatably connected in the connecting hole 5a of the connecting rod 5, the points of action provided at opposing positions move approximately linearly on the X-axis. can do. This allows the lid to be opened by simply pulling the lid body 2 in one direction. When closing, conversely, by moving the point of action to the negative side of the X axis,
The connecting shaft 8 returns to its original position following the same trajectory as when the lid is opened, and the lid main body 2 can be moved linearly and closed.

Furthermore, at the same time as the lid main body 2 is linearly moved by the rotation of the connecting rod 5, the lid main body 2 is moved by the guide 7.
Lid main body 2 is opened and closed by lifting and lowering. For this reason, the lid body 2 has the above-mentioned point of action, for example,
A burl hole as described in the 0375 publication is provided,
A crowbar is inserted into this to open and close it.

The burl hole is provided at a position radially opposite to the connecting shaft 8, and in FIG. 2, the center of the burl hole is located on the positive X axis.

6 and 7 show the opening and closing operations of the lid body 2. FIG.

To open the lid body 2, from the closed state shown in FIGS. 6(a) and 7(a), insert a crowbar into the crow hole 2a and first pull up one end of the lid body 2 as shown in FIGS. 6(a) and 7(a).

Next, when the crowbar is pulled in a direction away from the receiving frame l, the connecting rod 5 moves into the swivel 6 of the base 4 in FIG.
Turn counterclockwise around the center.

At this time, since the lid body 2 itself is rotatable at the tip of the connecting rod 5, if the crowbar is pulled along the X-axis in FIG. 2, the lid body 2 will also move with its center point on the X-axis.

When the connecting rod 5 begins to rotate in the direction of opening the lid,
As shown in FIG. 3, the bottom surface of the guide 7 tilts upward along the inclined surface 7a of the guide 7, so that the lid body 2 connected to the tip also rises accordingly. Therefore, jl! 6 rl
A (C) and Fig. 7 (C) (D 51: Simultaneously with the movement in the direction of arrow A, the guide 7 lifts in the direction of arrow B, and the lid main body 2 gradually moves from inside the receiving frame l. Finally, the connecting shaft 8 reaches the positive X axis in FIG. 2, and almost the entire connecting rod 5 enters the chamber 3, as shown in FIGS. As shown in Figure 7 (Sha), it is moved to the surface of the earth and opened.

In addition, when closing the lid body 2, you only need to perform the reverse operation, and if you push the lid body 2 straight toward the receiving frame l side with a crowbar, the lid body 2 will fit into the receiving frame 1 while lowering its level.
The connecting rod 5 also returns to the position shown in FIG.

As mentioned above, as long as you pull up one end of the lid body 2,
After that, the lid can be opened simply by pulling the crowbar in a straight line, making the work safer and less burdensome than the conventional reversible system, which required the operator to step over the receiving frame.

Furthermore, in the case of the swiveling type, a wide working range was required to move the lid body 2, but in the present invention, the lid body 2 is moved in a straight line, so there is no problem in working in narrow alleys.

Furthermore, since the lid main body 2 is moved in a straight line, the force of the operator acts only on a straight line and is not divided into a plurality of component forces or converted into other acting forces. Therefore, the lid main body 2 can be opened and closed using the most efficient force transmission, compared to the reversible type, which requires a force to resist the weight of the lid, and the rotating type, which requires a long travel distance. It can be easily opened and closed with little effort.

Moreover, by utilizing the lift function of the guide 7, when the lid body 2 moves, its lower surface does not come into contact with the ground surface or the upper end of the receiving frame l. For this reason, the receiving frame 1 and the lid body 2
It does not cause scratches on the ground, suppresses the occurrence of rust, and does not damage the paved surface of the ground.

Further, the lid body 2 is mechanically connected to the receiving frame 3 by the connecting rod 5, and when the lid body 2 is closed, the upward rotation angle of the connecting rod 5 is restricted, so that the lid body 2 does not float up.

Therefore, it is possible to prevent the lid body 2 from floating due to the lifting pressure inside the manhole.

In this embodiment, the connecting rod 5 is pivotally attached to the swivel 6 so as to be tiltable, but in addition, the connecting rod 5 is inserted into a pivot that vertically passes through the chamber 3 so as to be movable up and down. 7, it is also possible to have a structure in which the connecting rod 5 rises and falls while maintaining a horizontal state.

FIGS. 8 to 11 show another embodiment, in which a gutter bottom is provided with two connecting rods to improve linearity and strength when opening and closing the lid body 2.

In the figure, the lower part of the inner circumferential wall of the receiving frame l has a 2 bulge extending outward.
A plurality of chambers 3 are formed, each of which has a connecting rod 11 , 12 pivotably mounted thereon by a pivot shaft 10 passing longitudinally through the chamber 3 . and,
The lid body 2 is attached to the tip of the connecting rod 11゜12.
A long hole 11a through which the connecting shaft 13 attached to the lower surface of the
12a are perforated in each case. Further, an inclined surface 12b is provided on the upper surface of the lower connecting rod 12, and the upper connecting rod 11 is gradually raised when the lid is opened.

The connecting shaft 13 is attached to the lower surface of the lid main body 2 by inserting it into the seat 2b, and by inserting the support pole 2c into the hole 13a at the upper end so as to be swingable. Further, a restraining piece 13b is provided in the middle of the connecting shaft 13, and long holes 11a and 12a are provided.
The two connecting rods 11 and 12 are sandwiched so that they can interlock with each other by screwing the neck H3C onto the lower end of the rod.

Note that the connecting rods 11, 12 are pivoted so as to be movable up and down within the chamber 3, as shown in FIG. Therefore, there is no problem in lifting the connecting rod 11 when the lid is opened.

The opening/closing operation of the lid main body 2 is similar to the previous example, in which one end is pulled up using a crowbar, and then the lid main body 2 is moved in a straight line. When pulled in the negative direction on the X-axis in FIG. 9, the connecting rods 11, 12 respectively pivot to the axis 101! The tip sides cross each other while rotating, and the sloped surface 12
b causes the connecting rod 11 to move upward.

The connecting shaft 13 has a long hole 11a.

As the overlapping state of 12a changes, it moves linearly on the X-axis toward the negative side, raises the lid body 2, and separates from the receiving frame 1 to open the lid. Conversely, when closing the lid body 2, the lid can be easily closed by pushing the lid body 2 in the positive direction on the X-axis with a crowbar while lowering it onto the receiving frame l.

Note that in this embodiment, the connecting rod 11
．． 12 is pivotally connected by a pivot lO, and the ascending of the connecting rod 11 is realized by the inclined surface 12b.
This can also be achieved by installing a

FIG. 12 is an exploded perspective view showing still another embodiment, in which the lid body 2 is connected to the receiving frame 1 by two connecting rods 15a and 15b that are bendably connected by a pin 15c.
is connected to. In addition, in the mounting provided on the outer periphery of the receiving frame 1, a swivel 6 is rotatably attached to the seat 1b by a hinge 6b, and a connecting rod 15a is connected to the swivel 6 via a pin 15d so as to be able to swing up and down. There is. For installation, a guide 7 having an inclined surface 7a is formed below the seat 1b, and a connecting rod 15a is formed on the upper surface of the guide 7.
will be incorporated so that it appears. Further, an opening 1c is formed in the peripheral wall of the receiving frame l, and the connecting rods 15a and 15b protrude outward from this opening IC when the lid main body l is opened.

On the other hand, at the tip of the other connecting rod 15b,
A joint 15e is swingably attached by a pin 15f, and the upper end of the joint 15e is inserted into a connecting seat 2d provided on the lower surface of the lid body 2.

The opening/closing operation of the lid body 2 is exactly the same as that explained in FIGS. 1 to 5, and if the lid body 2 is pulled up with the crowbar and then pulled in the direction away from the receiving frame 1, the lid body 2 will not float. The lid is opened by moving over the receiving frame 1. The closing operation is the same, and if you push the crowbar linearly toward the receiver frame 1,
The lid main body 2 does not descend, but rests on the receiving frame l and is closed.

Furthermore, since the two connecting rods 15a and 15b are connected by the pin 15c, the displacement of the connection point with the lid body 2 due to the folding of the connecting rods 15a and 15b can be minimized, resulting in faster opening and closing operations. .

That is, rather than pulling the lid body 2 in the direction of the arrow in FIG. 12, if the attachment is pulled in a direction biased towards the seat lb, the connecting rod 15a will move toward the opening 1C and at the same time the other connecting rod 15b will move away from the pin 15C. Bent toward the inner wall of the receiving frame l.

Therefore, the connection point of the connecting rod 15b with the lid body 2 moves further toward the inner wall of the receiving frame 1 than in the case of FIG. 2, and the lid body 2 can be opened in a short time. Moreover, even when closing, the lid main body 2 can be quickly returned to its original position. Two more connecting rods 15a
, 15b, the distance to move the lid body 2 can be shortened, and the work load can be reduced, which is particularly preferable in the case of a large lid.

Although the embodiments have all been described with respect to a round lid for an underground structure, it is a matter of course that the structure of the present invention can be applied to square-shaped lids and lids of various shapes. For example, in the case of a rectangular lid, the connecting rod may have a substantially L-shape along the inner wall of the receiving frame, and the connecting rod may be housed in the inner wall of the receiving frame.

[Effects of the Invention] As explained above, in the present invention, the lid is opened while raising the level of the lid body by moving it in the direction of pulling the lid body away from the receiving frame, and conversely, the level is lowered by pushing it toward the receiving frame. The lid body is placed on the receiving frame and the lid is closed.

Therefore, since the lid body can be opened without being turned over, the operator can easily handle the lid body without stepping over the receiving frame, which reduces the workload and ensures safe work.

Furthermore, compared to the case where the lid body is opened by a swing type, the lid body can be moved linearly above the ground surface, and the lid body can be opened and closed even in narrow places such as alleys.

Therefore, even if it is for a large underground structure, it can be opened and closed reliably with light effort, and the work can be done more efficiently and safely than the conventional reversing type or rotating type.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the main parts of the receiving frame and the lid main body showing one embodiment of the present invention, Fig. 2 is a plan view, Fig. 3 is a perspective view showing the pivoting structure of the connecting rod, and Fig. 4 is FIG. 5 is a partially cutaway view showing the connection structure between the connecting rod and the lid body, FIG. 6 is a perspective view of the opening/closing operation of the lid body, FIG. 7 is a schematic sectional view, and FIG. Fig. 8 is a perspective view of the main parts showing another embodiment, Fig. 9 is a plan view thereof, Fig. 1O is a sectional view showing the pivoting structure of the connecting rod, and Fig. 11 shows the attachment of the lid body and the connecting shaft. The exploded perspective view shown in FIG. 12 is a diagram showing still another embodiment. 1: Receiving frame 1a: Inclined fitting surface 1b = Mounting seat IC: Opening 2: Lid body 2a = Inclined inclined surface 2b: Mounting seat 2C: Support bolt 2d: Connection seat 3: Chamber 4: Base 5: Connecting rod 5a : Hole 5b: Connecting hole 6: Swivel element 6b = Nut 6d: Bolt 7: Guide 8: Connecting shaft 8b: Nut lO: Pivot 11.12: Connectivity 11a, 12a 13: Connecting shaft 13b: Restricting piece 15a, 15b: 15C , 15d: 15f: Ping rod: Long hole 12b: Inclined surface 13a: Hole 13c: Nut connecting rod pin 15e: Joint

Claims (1)

[Claims] 1. A receiving frame and a lid body that opens and closes the receiving frame, the lid body is connected to the receiving frame by a mechanical connecting structure, and the connecting structure is configured to open and close the lid body. - A lid for an underground structure characterized by having a structure that allows movement in the closing direction and lifting and lowering operations at the same time. 2. The connecting structure includes a connecting rod whose base end is connected to the inner periphery of the receiving frame and whose distal end is connected to the lid main body, and the connecting rod is rotatable in the lid opening/closing direction inside the receiving frame; 2. The underground structure lid according to claim 1, wherein the lid is connected to be vertically movable. 3. The receiving frame is provided with a guide on which the bottom surface of the connecting rod slides at a position where the connecting rod is connected, and the guide has an inclined surface that raises the connecting rod when the lid is opened. 2. Lid for underground structures. 4. The connecting structure includes two separate connecting rods whose proximal ends are connected to the inner periphery of the receiving frame and whose distal ends are connected to the main body, and each of these connecting rods is provided with a long hole, and a long hole is formed in each of these connecting rods. 2. A lid for an underground structure according to claim 1, wherein the portions including the holes are arranged so as to be slidably superimposed on each other, and a connecting shaft provided on the lower surface of the lid body is inserted into the elongated hole. . 5. The lid for an underground structure according to claim 4, wherein the overlapping surfaces of the two connecting rods are sloped, and the slope allows these connecting rods to rise when moving in the direction of opening the lid. . 6. Claim 6, characterized in that a chamber bulging outward is formed in the inner circumferential wall of the receiving frame, one end of the connecting rod is connected to the chamber, and the connecting rod can be stored in the chamber. Lid for underground structures according to any one of 2 to 5. 7. The lid for an underground structure according to claim 2 or 3, wherein the connecting rod is divided into a plurality of parts and can be bent.