JP3766313B2 - Device for closing holes in lids for underground structures - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for closing a hole formed in an edge of a lid for an underground structure so as to be openable and closable.
[0002]
[Prior art]
Some lids for underground structures are provided with holes into which the opening tool is inserted, and in such lids, it is performed to attach a blocking plate that closes the holes and prevents intrusion of water and earth and sand, As an example, Japanese Utility Model Publication No. 7-54355 can be shown. However, in the case of the invention, the operating body provided with the closing plate is pivotally supported around the support shaft so that the hole can be closed without a gap. It is desirable to provide the inner surface of the receiving frame. The formation of such a recess is not preferable because the number of manufacturing steps increases, and there is a problem that it is difficult to manufacture as a product.
[0003]
On the other hand, in the invention of Japanese Patent Laid-Open No. 6-146314, the guide shaft provided on the back surface of the lid is inserted into the slide groove of the closure plug, whereby the closure plug is guided by the guide shaft. It has a system that guides linearly toward the insertion hole. However, in this method, the frictional resistance in the guide mechanism is large, and a heavier weight is required to place the closing plug in the closed position. Under such circumstances, other mechanisms cannot be provided, and for example, no locking mechanism is provided. If the lock mechanism is not provided, the iron lid is not restrained, which may lead to an accident, and if the lock mechanism is provided at another position, the position deviates from the center line of the lid opening / closing direction, which is uneven. Or two places on the left and right are necessary and it cannot be said that it is a good idea anyway.
[0004]
[Problems to be solved by the invention]
The present invention has been made paying attention to the above points, and the problem is that the hole can be closed without gaps without causing interference with other portions, and at the same time, a lid locking mechanism can be provided. It is to provide a hole closing device.
[0005]
[Means for Solving the Problems]
The object of the present invention to solve is provided with a link member having a closing plate for closing a hole at one end of the outer, upper and lower intermediate portions of the inner end and the link member of the link member 2 Each of the parallel members is pivotally supported at one end, and the two parallel members are pivotally supported by the lid at the other end, so that the closing plate is relatively close to the closed position on the outside and higher than that. between a retracted position within the lower forming a movable parallel link parallel, by the action of the biasing means to the parallel link, in which closure plate has taken steps that biases in a direction to close the aperture is there. Further, when the closing plate is in the closed position, it engages with a mating portion provided on the lid receiving frame side, and when the closing plate is in the retracted position, the lock member that is disengaged is pivotally supported on the lid. In addition, it is possible to take a means of adding a configuration such as that described above and linking to the movement of the link constituent member.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The hole closing device according to the present invention is for closing a hole formed at the edge of a cover for an underground structure so as to be openable and closable. There are openings called manholes or hand holes in the underground structure, and when opening the lid that closes it, there are holes in the lid that allow you to pry it with a tool called a hand key or a bar. Is provided. What is on the edge of the inner lid of the hole is difficult to provide a closing plate for closing the hole without causing contact with the lid receiving frame side. Therefore, in the present invention, a member having a closing plate at one end is provided as one member of the link mechanism. It is desirable that the blocking plate has a structure that fits into the hole so as to plug from below.
[0007]
The closing plate is provided at one end of the link member, and two upper and lower parallel members are pivotally supported at other end portions of the link member at the other end. The parallel member is further pivotally supported on the lid (the back surface thereof) at the other end, thereby forming a parallel link. The parallel link is movable between a closed position where the closing plate takes a relatively upper position on the outside and a retracted position where the closing plate takes a position below the inside. The posture will always be kept constant.
[0008]
In the present invention, the biasing means acts on the parallel links. As one of the urging means, an elastic member is provided, and by the elastic force, the closing plate can be urged in the direction of closing the hole. The elastic member may be provided in any way as long as it can act on the parallel link and urge the closing plate to the closed position, and its specific shape and structure can be arbitrarily designed.
[0009]
Further, a locking member that can be engaged with a mating portion provided on the lid receiving frame side when the closing plate is in the closed position and is released from the above-described engageable state when the closing plate is in the retracted position. It can be pivotally supported on the lid (the back). The lock member moves in conjunction with the movement of the link constituting member of the parallel link, and the engagement and the release are performed based on the movement.
[0010]
The parallel link can receive a backup of the lock member by linking with the lock member. That is, the lock member can act as a biasing means. Therefore, under the configuration in which the closing plate is positioned in the direction of the closing position, there is no need for other urging means such as a spring, but it is effective for always closing the hole. Further, when an elastic member such as a spring is damaged, the closing plate is moved close to the closed position, so that the hole is not fully opened.
[0011]
【Example】
Hereinafter, the present invention will be described in more detail with reference to the illustrated embodiments. In Example 1 shown in FIGS. 1 and 2, reference numeral 11 denotes a lid receiving frame provided in the underground structure, and 12 denotes a lid. An inclined receiving surface provided on the inner surface of the cover receiving frame supports and supports the tapered upper surface of the outer periphery of the lid body, and an inward projecting portion is provided below the inclined receiving surface. It is composed.
[0012]
A hole 14 used for opening operation or the like is formed in a cutout shape on the outer periphery of the lid 12, and a closing plate 15 for closing the hole 14 is provided as a part of the hole closing device 10 on the back surface of the lid. ing. The closing plate 15 has a tapered structure that fits into the hole from below, and has a flange 16 that is larger than the hole 14 in the lower part (FIG. 2), and is completely closed by contacting the periphery of the hole. Also, it can play the role of a stopper.
The closing plate 15 is provided at one end on the outer side of the link member 17, and shaft support portions 18, 19 are set in the middle portion of the inner end of the link member 17, respectively. , 19, two parallel members 20, 21 are pivotally supported at one end of each. As shown in FIG. 1, the lower parallel member 20 is composed of two portions 20a and 20b located on both sides of the link member 17, and is supported by the shaft support portions 18 and 18 on both sides, and the upper parallel member 21 is a link. It is located between the parts of the member 17 shown as a bifurcated structure and is supported by a shaft member 19a. Reference numerals 18a, 18b, and 19b denote shaft holes. The parallel members 20 and 21 are pivotally supported by the lid 12 at the other end. Reference numerals 22 and 23 denote the respective shaft support portions (see FIGS. 1 and 2).
[0013]
Therefore, the link member 17 and the parallel members 20 and 21 constitute a parallel link in which each side connecting the four shaft support portions 18, 19, 22 and 23 is parallel. The cover 12 serves as a link member between the shaft support portions 22 and 23. With such a parallel link configuration, the closing plate 15 can be moved in parallel between a relatively closed position A on the outside and a retracted position B on the inside and below, and the tapered closing plate 15 is constant. Therefore, there is no risk of fitting into the hole 14 accurately and contacting the inside of the lid receiving frame 11 or the like. Note that the left and right two portions 20 a and 20 b of the lower parallel member 20 are combined together by a stopper 24.
[0014]
Bearing portions 25 and 26 are provided on the back surface of the lid 12 for attaching the parallel links (see FIG. 3). The bearing portions 25 and 26 are portions that support and support both ends of the upper shaft support portion 23 formed at the time of casting the lid body, and a notch portion 28 is provided in a part 27 for insertion thereof. Further, an attaching portion 28 ′ of the lower shaft support portion 22 is provided in an inner portion following the notch portion, and the lower shaft support portion 22 attached thereto also serves as a retaining of the upper shaft support portion 23. Reference numeral 29 denotes an elastic member as an urging means, whereby the closing plate 15 is positioned at a position A where the hole 14 is closed.
[0015]
In this state, when the closing plate 15 is pushed in, the link mechanism rotates counterclockwise in FIG. 2 around the shaft support pieces 22 and 23, and accordingly the closing plate 15 also moves to the retracted position below the inside (FIG. 2 chain line). ). During this time, the closing plate 15 is kept in the same posture.
[0016]
FIG. 4 and subsequent figures show a second embodiment, and the lock member 30 is pivotally supported by the lid 12 so as to straddle the link member 17 constituting the parallel link. The lock member 30 is attached to the shaft support portion 32 of the lid body 12 by a shaft portion 31 in a suspended state, and is located under the above-described counterpart portion 13 and has an engaging portion 33 that can be engaged. It is a weight and is placed in a state of being linked to the link member 17 so that the engagement is released when the closing plate 15 is in the retracted position B (see FIGS. 6 and 7).
[0017]
As a linking means, the link member 17 has protrusions 34 on the left and right sides, and the lock member 30 has a protrusion receiving part 35 that can contact the protrusions 34 on the front surface (outer surface). Reference numeral 36 denotes a locking portion provided at a position where the protruding portion 34 of the link member 17 is locked with the protruding portion 34 with a space in which the protruding portion 34 of the link member 17 can be disposed. By this connecting means, the closing plate 15 and the locking member 30 are related to each other in a state where they can be interlocked, and the locking member 30 is moved by operating the closing plate 15 while the load of the locking member 30 is applied to the closing plate 15. Will be able to. Since the other structure may be the same as that of the first embodiment, reference numerals are used and detailed description is omitted.
[0018]
In the hole closing device 10 according to the second embodiment of the present invention configured as described above, the closing plate 15 in which the hole 14 of the lid 12 is in the closing position A in the state where the lid 12 is set on the lid receiving frame 11. Further, the lock member 30 is suspended by the shaft portion 31 and the engaging portion 33 is positioned below the mating portion 13 on the lid receiving frame side and is in an engageable state. It is the state of FIG. At this time, the closing plate 15 is placed at the position A where the hole 14 is closed as a result of the parallel movement from the lower inside to the outside upward while maintaining the same posture by a preset link mechanism. The flange portion 16 is in contact with the hole 14 on the lid side where the mechanism is provided, and there is no need to worry about contact with the lid receiving frame side. This is the same as the first embodiment. Since the closing plate 15 is biased to the closed position A by the elastic member 29, the hole 14 can be closed tightly.
[0019]
In the closed state, the lid 12 is placed in a locked state by the lock member 30 and is also restrained by a lid hinge mechanism (not shown) located 180 degrees opposite to the lock member 30 and the center of the lid. Is in a state. For this reason, even if the internal pressure rises in the underground structure and the lid body 12 is strongly pressurized, there is no risk that the lid body 12 will jump off.
[0020]
In the opening operation, the closing plate 15 is pushed by the tip of the tool 37 (FIG. 7). At that time, since the closing plate 15 moves in parallel and the posture does not change, the tool 37 does not slip and moves smoothly to the retracted position B. At the same time, the locking member 30 is rotated counterclockwise in the figure by the connecting means, and the engagement is achieved. The part 33 can be detached from the bottom of the counterpart part 13. Therefore, it is possible to pry the projection 39 on the back surface as a fulcrum (the state shown in FIG. 7) and pull it onto the lid receiving frame in a state where the tip portion 38 of the tool 37 is hooked on the lid side.
[0021]
When the lid receiving frame opening is closed again by the lid 12 after the lid is opened, the lock member 30 is pushed inward by the upper inclined surface of the mating portion 13 as it descends, and is positioned under the mating portion 13 after passing and is locked. Placed in. Since the backup of the closing plate 15 can be obtained also by the lock member 30, the hole 14 is reliably closed. If the closing plate 15 is not pushed by the tool 37, the closing plate 15 returns to the closed position A where the hole 14 is closed by the biasing force of the elastic member 29.
[0022]
【The invention's effect】
Since the present invention is configured and operates as described above, it does not interfere with the lid receiving frame side as well as the lid body side provided with the hole closing device, does not cause contact, and does not gap the hole. Since it can be closed and a lock mechanism for the lid can be additionally provided, it is possible to obtain a reliable hole blockage and a locked state with the minimum necessary configuration.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a first embodiment of a hole closing device for a lid for an underground structure according to the present invention.
FIG. 2 is a cross-sectional view of the same closed position A.
FIG. 3 is a rear view of the lid for explaining the portion of FIG. 1;
FIG. 4 is an exploded perspective view showing a main part of a second embodiment of the device of the present invention.
FIG. 5 is a perspective view of the assembled state.
FIG. 6 is a cross-sectional view of the closed position A.
FIG. 7 is a cross-sectional view showing a backward position B in the same manner.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Hole part obstruction | occlusion apparatus 11 Lid receiving frame 12 Lid body 13 Opposition part 14 Hole part 15 Closure board 17 Link member 18, 19, 22, 23 Shaft support part 20, 21 Parallel member 29 Elastic member 30 Lock member 33 Engagement part 34 Protrusion part 35 Projection receiving part

Claims (5)

An apparatus for closing a hole formed at an edge of a lid for an underground structure so as to be openable and closable, comprising a link member having an obstruction plate for closing the hole at an outer end. pivoted inward end and the link middle portion in the vertical two parallel members of the members of the link member at one end portion of each, two parallel members pivotally supporting the lid at the other end portion it makes by the closure plate between the relatively outer upper closed position and a retracted position inside the lower than to form a movable parallel links parallel, the action of the biasing means into a parallel link, closed A device for closing a hole in a lid for an underground structure, wherein the plate is biased in a direction to close the hole.   2. The hole closing device for a lid for an underground structure according to claim 1, wherein the closing plate has a tapered structure that fits into the hole from below, and has a flange that is larger than the hole in the lower part.   The hole closing device for a lid for an underground structure according to claim 1, wherein the biasing means is an elastic member provided on the parallel link so that the closing plate biases the hole in a closing direction by an elastic force. An apparatus for closing a hole formed at an edge of a lid for an underground structure so as to be openable and closable, comprising a link member having an obstruction plate for closing the hole at an outer end. pivoted inward end and the link middle portion in the vertical two parallel members of the members of the link member at one end portion of each, two parallel members pivotally supporting the lid at the other end portion it makes by the closure plate between the relatively outer upper closed position and a retracted position inside the lower than to form a movable parallel links parallel, the action of the biasing means into a parallel link, closed The plate is urged in the direction of closing the hole, and can be engaged with a mating portion provided on the lid receiving frame side when the closing plate is in the closed position, and the engagement is performed when the closing plate is in the retracted position. Underground structure characterized in that a lock member that is released from a state where it can be fitted is pivotally supported on the lid Hole closure apparatus use a lid.   5. The hole closing device for a lid for an underground structure according to claim 4, wherein the parallel link is in a state capable of being backed up so as to regulate the closing plate to the closed position by being linked to the lock member.

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