JP2009007893A - Iron lid opening/closing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an iron lid opening/closing device capable of relieving pressure without opening an iron lid when pressure in an embedded structure is increased and automatically restoring the iron lid to an original closing position when the increased pressure is relieved. <P>SOLUTION: The iron lid opening/closing device 100 for opening and closing the iron lid 50 installed at a receiving frame 30 provided in the upper section of the embedded structure 10 comprises a lock member 110 attached to the iron lid and capable of being hooked to a lock section 34 of the receiving frame, a closing member 130 attached to an opening of the iron lid and a connection member 150 connecting the lock member and the closing member. A specified space is formed in the height direction between the lock member and the hooking member in a state of closing the iron lid. The iron lid is unlocked by pressing the closing member downward and turning the lock member inward by the connection member, and is lifted to be opened. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an iron lid opening and closing device for opening and closing an iron lid mounted on a receiving frame portion provided on an upper portion of an embedded structure such as an iron casing or a manhole buried underground.

  In the basement, laying pipes for supplying water, gas, electricity, etc. are buried, and these laying pipes are connected with control valves such as water control valves and buried equipment such as connectors and breakers. In order to operate and maintain the buried equipment from the road surface, to maintain and inspect them, and to protect them and to clearly indicate the place of installation, a buried structure including a hollow housing and a manhole is installed.

A receiving frame for fitting and supporting the iron lid so as to be openable and closable is provided at the upper end opening of the embedded structure. This receiving frame portion may be provided integrally with the embedded housing or may be formed of another member. The iron lid is supported in a fitted state (closed state) in the opening of the receiving frame portion such that the upper surface thereof is substantially flush with the road surface. The iron lid is attached to the receiving frame portion so as to be openable and closable via a trillion, a connecting rod, a chain, or the like.
JP 2001-146758 A

  Iron lids for water and sewage manholes have various roles, but recently, in particular, it has become necessary to cope with sewage spouts caused by excessive capacity of sewage pipes during heavy rains. Moreover, there exists a possibility that an iron lid may surface or may be scattered by this ejection. For this purpose, an iron lid and its opening / closing device in consideration of safety measures are required. In this case, the conditions for the iron lid to prevent ascent and scattering are to prevent pressure rise in the pipeline facility, improve the exhaust capacity from the pipeline facility, and improve the pressure resistance of the iron lid. There are things to plan. However, the conventional iron lid opening / closing device cannot sufficiently meet such a demand.

  The present invention has been made in view of such technical problems. The object of the present invention is to release the pressure without opening the iron lid when the pressure in the buried structure rises, and when the pressure rise is released, the iron lid is automatically returned to the original closed position. It is to provide an iron lid opening and closing device that can be returned to the state.

  In order to achieve the above object, the present invention provides an iron lid opening / closing device for opening and closing an iron lid mounted on a receiving frame portion provided on an upper portion of an embedded structure, and a latching portion formed on the receiving frame portion. A locking member attached to the iron lid so as to be hookable to the iron lid, a closing member attached to be able to open and close the opening of the iron lid, and a connecting member for connecting the locking member and the closing member. A predetermined gap is provided in a height direction between the lock member and the hooking portion in a state where the iron lid is closed, and the lock member is pushed down to open and the lock member via the connecting member. The lock member is brought into an unlocked state in which the lock member is not latched by the latching portion, and the iron lid is lifted and opened in the unlocked state.

  According to the present invention, when the pressure in the embedded structure rises, the pressure can be released without opening the iron lid, and when the pressure rise is released, the iron lid is automatically returned to the original closed position. An iron lid opening and closing device that can be returned to is provided.

  Embodiments of the present invention will be specifically described below with reference to the drawings. Note that the same reference numerals denote the same or corresponding parts throughout the drawings. FIG. 1 shows a state when an iron lid 50 is closed in a buried structure (buried housing) 10 provided with an iron lid opening / closing device 100 according to an embodiment of the present invention, taken along line 1-1 in FIG. FIG. FIG. 2 is a plan view of the embedded structure 10 of FIG. 1 viewed from the ground. In FIG. 1 and FIG. 2, pipes such as water, gas or electricity are buried in the ground, and concrete or bricks are located near the buried equipment such as control valves (water control valves or partition valves) provided in the middle. A pedestal (bottom pedestal) made of or the like is embedded, and a cylindrical embedded housing 20 is supported on the pedestal.

  A receiving frame portion 30 having an opening 31 for supporting the iron lid 50 so as to be openable and closable is fixed to the upper end portion of the embedded housing 20. An iron lid 50 is fitted and supported in the opening 31 in a state that can be opened and closed from the ground. The iron lid 50 is attached to the receiving frame portion 30 by a connecting structure 70 having a connecting member 71 so as to be rotatable (openable / closable). A pin 72 is formed at one end of the connecting member 71, and a protruding portion 73 projecting sideways is formed at the other end. A groove 51 is formed in the iron lid 50. A shelf portion 33 having an opening 32 is formed in the receiving frame portion 30. The connecting member 71 is slidably engaged with the pin 72 in the groove 51 and is inserted through the opening 32. The protruding portion 73 of the connecting member 71 is prevented from coming off by the peripheral portion of the opening 32. Thus, the iron lid 50 is connected to the receiving frame portion 30 via the rod-like connecting member 71 so as to be opened and closed while being prevented from coming off (preventing scattering). By rotating the iron lid 50 to the ground and opening it, the inside of the embedded structure 10 can be accessed and work such as inspection and maintenance can be performed. An iron lid opening / closing device 100 for opening and closing the iron lid 50 mounted on the receiving frame portion 30 provided on the upper portion of the embedded structure 10 is provided at a position opposite to the diameter direction of the connecting structure 70 of the iron lid 50. .

  3 is a bottom view of the iron lid opening / closing device 100 in FIG. 1 as viewed from line 3-3, and FIG. 4 is a front view of the iron lid opening / closing device 100 as viewed from 4-4 in FIG. FIG. 5 is a view showing a part of the receiving frame portion 30 in the iron lid opening / closing device 100 in FIG. 1, (a) is a front view, and (b) is seen from a line bb in (a). FIG. 6 is a rear view (bottom view) of the iron lid 50 in the iron lid opening / closing device 100 in FIG. 7 is a partial front view as seen from line 7-7 in FIG. FIG. 8 is a partial front view as seen from line 8-8 in FIG. 9 is a partial front view as seen from line 9-9 in FIG.

  FIG. 10 is a view showing the lock member 110 in FIG. 1, (a) is a front view, and (b) is a side view as seen from bb in (a). 11 is a view showing the closing member 130 in FIG. 1, (a) is a plan view, (b) is a side view as seen from line bb in (a), and (c) is FIG. It is the front view seen from line cc in (a). FIGS. 12A and 12B are views showing the connecting member 150 in FIG. 1, in which FIG. 12A is a side view, and FIG. 12B is a bottom view as seen from the line bb in FIG. FIG. 13 shows a state when the iron lid is lifted by the internal pressure of the embedded structure in the iron lid opening / closing device 100 in FIG. 1 to prevent further increase in the internal pressure (state when the pressure is released). FIG. FIG. 14 is a side view showing a state in which the iron lid is unlocked by using a dedicated tool and the iron lid can be opened (turned) in the iron lid opening / closing device 100 in FIG. 1. Hereinafter, the iron lid opening / closing device 100 according to the present embodiment will be described with reference to these drawings.

  1 to 14, an iron lid opening / closing device 100 provided at a position opposite to the diameter direction of the coupling structure 70 of the iron lid 50 includes a lock member 110, a closing member 130, and a coupling member 150. The lock member 110 is attached to the iron lid 50 so that it can be latched with respect to the latching part 34 formed in the receiving frame part 30. The lock member 110 has a substantially U shape (or a substantially gate shape) with an open upper end, and a convex portion 111 for shaft support is formed on both sides of the upper end portion. On the other hand, support portions 52a and 52b are formed on the iron lid 50 at a predetermined interval, and shaft support holes 55 are formed on the opposing surfaces of these support portions. The lock member 110 is attached so as to be rotatable about the shaft support hole by fitting the convex portions 111 on both sides into the shaft support holes 55 on both sides.

  The closing member 130 is rotatably supported by the iron lid 50. The iron lid 50 is formed with opposing guide portions 53a and 53b at predetermined intervals inside the support portions 52a and 52b. Support holes 56 and 56 formed of elongated holes in the horizontal direction (substantially in the radial direction of the iron lid 50) are formed on the opposing surfaces of the guide portions 53a and 53b. Guide grooves 57 and 57 are formed on the opposing surfaces of the guide portions 53a and 53b. The guide grooves 57 and 57 are grooves inclined downward toward the inside of the iron lid 50. The lower end of each guide groove is an open end. The leading end portions of the guide portions 53a and 53b are connected by a connecting portion 54 formed integrally. In the support holes 56, 56, a support shaft 101 that is the center of rotation (rotation) of the closing member 130 and the connecting member 150 is fitted so as to be slidable (slidable).

  Shaft holes 131 and 131 for fitting with the support shaft 101 are formed at predetermined intervals in the width direction of the base of the closing member 130. Therefore, the closing member 130 is supported by the support holes 56, 56 via the support shaft 101 so as to be movable into the iron lid 50. Further, on both sides of the closing member 130, convex portions 131 and 131 that are slidably engaged with guide grooves 57 and 57 that are inclined inward and downward are formed. Accordingly, when the closing member 130 is pushed down from the ground by a bar or the like, the closing member 130 moves inward along the support holes 56 and 56 and rotates downward about the support shaft 101 supported by the support holes 56 and 56. It is so fitted. The closing member 130 is pushed down to engage an opening / closing tool such as a dedicated bar during the opening / closing operation of the iron lid 50, and is normally held at the closing position in FIG. 1 by an urging force such as a spring. The connecting portion 54 formed integrally with the guide portions 53a and 53b can be used to latch one end of a spring (for example, a torsion coil spring) that biases the closing member 130 to the closing position.

  The connection member 150 releases the lock of the lock member 110 by transmitting the movement of the closing member 130 to the lock member 110. The connecting member 150 has a substantially U shape (or a substantially gate shape) in which the ends of the left and right arm portions 151 a and 151 b are coupled by a base portion 152. Support holes 153 and 153 that fit into the support shaft 101 are formed on the left and right sides of the connecting member 150. Convex portions 112, 112 for connecting to the connecting member 150 are formed on the opposing inner side surfaces of the both arm portions of the lock member 110. Correspondingly, elongated holes 154 and 154 that engage with the convex portions 112 and 112 of the lock member 110 are formed on the left and right sides of the connecting member 150. Thus, the connecting member 150 is supported so as to be rotatable coaxially with the support shaft 101 that is the rotation center of the closing member 130, and at the same time in the same direction by the movement (slide) of the support shaft 101 along the long holes 56 and 56. It is supported movably.

  A hook portion 113 is formed at the lower portion of the central portion of the lock member 110. In the illustrated example, the hook portions are formed at two places with a predetermined interval. On the other hand, on the inner surface of the opening portion 31 of the receiving frame portion 30, a hooking portion 34 that can be hooked with the hook portion 113 of the lock member 110 in a retaining state is formed. In the state where the iron lid 50 shown in FIG. 1 is closed, a gap 35 is provided in the vertical direction between the hook portion 113 and the latching portion 34, and the iron lid is caused by an increase in internal water pressure or atmospheric pressure. When 50 is lifted by a predetermined height as shown in FIG. 10, the hook portion 113 is hooked on the hook portion 34. Then, when there is no increase in internal water pressure or atmospheric pressure, the iron lid 50 automatically returns to the original closed position by its own weight.

  Next, in the iron lid opening / closing apparatus 100 described above, an operation when the iron lid 50 is opened and closed using a tool such as a bar will be described. In the normal state in which the iron lid 50 is closed, the closing member 130 is biased and held at a raised position where the tool opening 58 is closed by a spring biasing force (for example, a torsion coil spring attached to the support shaft 101). That is, the opening for inserting the tool for lifting the iron lid is closed. At this time, the protrusion 131 of the closing member is located at the upper end of the guide groove (inclined groove) 57 of the iron lid 50. Further, the lock member 110 is rotated in the clockwise direction in FIG. 1 around the shaft hole 55 of the iron lid 50 by a spring biasing force (for example, a torsion coil spring 114 attached to the convex portion 111 that forms the center of rotation). And is held (regulated) at a position where it can be hooked to the hooking portion 34 of the iron lid 50. In this locked state, the lock member 110 is held at a position where the hook portion 113 is separated from the hook portion 34 by the gap 35, and can move upward together with the iron lid 50 by the gap 35.

  When opening the iron lid, the closing member 130 is first pushed down with a tool such as a dedicated bar. Then, the convex portion 131 moves obliquely downward along the guide groove 57 and the support shaft 101 supporting the closing member 130 moves horizontally along the support hole (long hole) 56 toward the inside. To do. As a result, the closing member 130 is pushed down and released, and moves toward the center of the iron lid 50. As a result, the tool can be rotated and engaged with the side edge of the tool opening 58.

  When the support shaft 101 moves inward by pushing down the closing member 130, the connecting member 150 pivotally supported by the support shaft moves in the direction toward the center of the iron lid 50 (inward). The long hole 154 formed in the connecting member 150 is engaged with the convex portion 112 of the lock member 110. For this reason, when the connecting member 150 moves inward along the support hole 56 by a predetermined distance, the projection 112 is pulled inward by the long hole 154, and the lock member 110 moves the shaft support hole 55 (or the projection 111). It rotates counterclockwise in FIG. 1 about the center. As a result, as shown in FIG. 14, the lock member 110 can move upward without being latched with the latch portion 34. That is, the lock member 110 is unlocked, and the iron lid 50 can be lifted and opened. The iron lid 50 is rotated to the ground to be opened, and a predetermined operation for the embedded structure 10 is performed. When closing the iron lid 50, it is possible to automatically return to the closed state of FIG. 1 simply by dropping the iron lid 50 into the opening 31 of the receiving frame portion 30.

  The iron lid opening and closing device 100 according to the present embodiment, that is, the iron lid opening and closing device 100 for opening and closing the iron lid 50 mounted on the receiving frame portion 30 provided on the upper portion of the embedded structure 10 is formed in the receiving frame portion. A locking member 110 attached to the iron lid so as to be hookable on the hooking portion 34, a closing member 130 attached so as to be able to open and close the opening 58 of the iron lid, and a connecting member for connecting the locking member and the closing member 150. Therefore, a predetermined gap 35 is provided in the height direction between the lock member 110 and the latching portion 34 in a state where the iron lid 50 is closed, and the closing member 130 is pushed down to be opened and locked through the connecting member 150. By rotating the member inward, the lock member is brought into an unlocked state in which the lock member is not latched by the latching portion, and the iron lid is lifted and opened in the unlocked state.

  Further, in the present embodiment, the closing member 130 is configured to move in the direction of descending inward along the guide groove 57 formed in the iron lid 50 by being pushed down. Further, the closing member 130 is biased to the closing position by the elastic force of the spring 132. The closing member 130 and the connecting member 150 are supported so as to be rotatable about a common support shaft 101 that can move in the horizontal direction along a support hole (long hole) 56. Further, the connecting member 150 and the lock member 110 are connected with play by engaging the projection 112 with the elongated hole 154. Further, the lock member 110, the closing member 130, and the connecting member 150 are supported and connected at two places on the left and right. Further, the lock member 110 is biased to a lock position where the lock member 110 can be hooked with the hook portion 34 by an elastic force. The lock member 110 is urged to a lock position where the lock member 110 can be hooked with the hook portion 34 by the elastic force of the spring 114.

  Therefore, according to the embodiment described above, when the pressure (water pressure or atmospheric pressure) in the embedded structure increases, the pressure can be released without opening the iron lid, and the increase in pressure is released. An iron lid opening / closing device capable of automatically returning the iron lid to the original closed position is provided. That is, even when the iron lid 50 is lifted due to an increase in the water pressure in the sewage, the water can be discharged sequentially. Therefore, the iron lid 50 does not move greatly due to a certain amount of water release, and the position of the iron lid 50 The iron lid can be automatically placed in the original receiving frame 30 when the water pressure drops. Moreover, in the iron lid opening and closing device according to the embodiment, the support portions and the connecting portions of the respective members are arranged at two places on the left and right sides of a predetermined width. Can be realized.

It is the longitudinal cross-sectional view which looked at the state which closed the iron lid in the embedment structure provided with the iron lid opening / closing apparatus which concerns on one Embodiment of this invention along the line 1-1 in FIG. It is the top view which looked at the embedded structure of FIG. 1 from the ground. It is the bottom view which looked at the iron lid opening / closing apparatus in FIG. 1 from the line 2-2. FIG. 3 is a front view of the iron lid opening / closing device viewed from 3-3 in FIG. 1. It is a figure which shows a part of receiving frame part in the iron lid opening / closing apparatus in FIG. 1, (a) is a front view, (b) is sectional drawing seen from the line bb in (a). . It is a back view (bottom view) of the iron lid in the iron lid opening and closing device in FIG. It is the partial front view seen from the line 7-7 in FIG. It is the partial front view seen from line 8-8 in FIG. It is the fragmentary front view seen from the line 9-9 in FIG. It is a figure which shows the locking member in FIG. 1, (a) is a front view, (b) is the side view seen from bb in (a). It is a figure which shows the obstruction | occlusion member in FIG. 1, (a) is a top view, (b) is the side view seen from the line bb in (a), (c) is in (a) It is the front view seen from line cc. It is a figure which shows the connection member in FIG. 1, (a) is a side view, (b) is the bottom view seen from the line bb in (a). FIG. 2 is a side view showing a state (pressure release state) in which the iron lid is lifted by the internal pressure of the embedded structure in the iron lid opening / closing device in FIG. 1. In the iron lid opening and closing device in FIG. 1, the iron lid is unlocked using a tool, and the iron lid can be opened.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Embedded structure 20 Case main body 30 Receiving frame part 34 Latching part 35 Clearance (height direction)
50 Iron cover 57 Guide groove 58 Opening (for tools)
DESCRIPTION OF SYMBOLS 100 Iron lid opening / closing apparatus 110 Lock member 130 Closure member 150 Connection member

Claims (7)

In the iron lid opening and closing device for opening and closing the iron lid mounted on the receiving frame provided on the upper part of the buried structure,
A locking member attached to the iron lid so that it can be hooked to a hooking portion formed in the receiving frame portion;
A closing member attached so that the opening of the iron lid can be opened and closed;
A connecting member that connects the locking member and the closing member;
With
A predetermined gap is provided in the height direction between the lock member and the latching portion in a state where the iron lid is closed,
By pushing down and opening the closing member and rotating the lock member inward via the connecting member, the lock member is brought into an unlocked state in which the lock member is not hooked,
An iron lid opening / closing device that lifts and opens the iron lid in the unlocked state.   2. The iron lid opening / closing device according to claim 1, wherein the closing member moves in a downward direction inward along a guide groove formed in the iron lid by being pushed down.   The iron lid opening and closing device according to claim 1, wherein the closing member is biased to a closing position by an elastic force.   4. The iron lid according to claim 1, wherein the closing member and the connecting member are rotatably supported around a common support shaft that is movable in the horizontal direction. 5. Switchgear.   5. The iron lid opening and closing device according to claim 1, wherein the connecting member and the lock member are connected with play by engaging a convex portion with a long hole. 6.   The iron cover opening and closing device according to any one of claims 1 to 5, wherein the lock member, the closing member, and the connecting member are supported and connected at two left and right positions.   The iron lid opening and closing device according to any one of claims 1 to 6, wherein the lock member is urged by an elastic force to a lock position where the lock member can be hooked with the hook portion.

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