JP4191530B2 - Iron lid opening / closing structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an iron lid opening / closing structure for mounting an iron lid in a locked state so as to be openable and closable on a receiving frame portion provided on an upper portion of a structure (housing) such as an iron housing or a manhole buried underground.
[0002]
[Prior art]
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, maintain, and inspect the buried equipment of the building from the road surface, and to protect them and to clearly indicate the installation location, a buried structure (buried housing) consisting of a hollow housing and a manhole is installed. .
[0003]
A receiving frame portion for fitting and supporting the iron lid so as to be openable and closable is provided at the upper end opening of the buried housing (buried structure). The receiving frame portion may be provided integrally with the embedded housing body 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 or a chain.
[0004]
[Problems to be solved by the invention]
Various types of structures and sizes are used as iron covers installed on the road surface, depending on the purpose of use, etc. It is necessary to. That is, when used for many years in a place where heavy traffic is heavy and heavy vehicles are used for many years, the wear of the iron lid tends to become correspondingly severe, and only the surface of the iron lid that hits the wheel of the vehicle In addition, wear occurs on the contact surface (receiving surface and fitting surface) between the receiving frame portion and the iron lid. When wear occurs on such a contact surface, there is a high possibility that the position of the iron lid is shifted or detached due to rattling between them.
[0005]
In that case, from the viewpoint of risk prevention, even if a little rattling occurs in the iron lid, it is necessary to reliably prevent the iron lid from coming off. Therefore, in the embedded housing, the iron lid can be reliably prevented from coming off. There is a strong demand for an iron lid opening / closing structure that can be used. On the other hand, in order to ensure workability such as maintenance inspection in the buried enclosure, it is also required that the opening and closing operation of the iron lid can be performed easily and quickly.
[0006]
The present invention has been made in view of such technical problems, and an object of the present invention is to securely lock (lock) the iron lid with respect to the frame portion with the iron lid closed. It is an object to provide an iron lid opening / closing structure that can surely prevent the iron lid from coming off and can easily open the iron lid without a tool.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention (invention according to claim 1) is an iron lid opening / closing structure for detachably mounting an iron lid on a receiving frame portion provided in an upper part of a housing buried underground. A locking member pivotally supported on the back surface of the iron lid so as to be able to swing in a locking and disengaging direction with respect to a locking portion formed inside the receiving frame portion, and the lock of the peripheral portion of the iron lid An opening that is formed at a position corresponding to the member and can be closed by the locking member; a return spring that locks the locking member to the locking portion and elastically biases the opening in a direction to close the opening; The lock can be operated from the upper surface side of the iron lid and can be engaged with the engaging portion of the lock member through the through hole of the iron lid and lifted upward to resist the elastic biasing force of the return spring. Rotate the member in a direction to release it from the locking part The iron lid lifting capable disposed a grip member provided with, engagement of the in conjunction with the operation of lifting the handle member back the said locking member said receiving frame portion against the elastic biasing force of the spring while The operation of lifting the iron lid while detaching from the stopper, and pressing the lock member downward from the opening, thereby engaging the lock frame against the elastic biasing force of the return spring. The iron cover can be opened by any of the operation of lifting the iron cover while being detached from the stop .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
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 is a plan view showing a state in which an iron lid of a buried housing having an iron lid opening / closing structure to which the present invention is applied is closed, and FIG. 2 is an iron to which the present invention is applied along a line 2-2 in FIG. 3 is a longitudinal sectional view showing a lid opening / closing structure, FIG. 3 is a plan view of the lock member 8 in FIG. 2, FIG. 4 is a side view of the lock member 8 in FIG. 3, and FIG. 8 is a front view of FIG.
[0009]
6 is a plan view of the shaft 14 in FIG. 2, FIG. 7 is a front view of the return spring 13 in FIG. 2, FIG. 8 is a front view of the handle member 15 in FIG. 2, and FIG. 2 is a partial longitudinal sectional view showing a state in which the handle member 15 is lifted to disengage the lock member 8 from the engaging portion 12 and the iron lid 4 is slightly lifted in the iron lid opening / closing structure shown in FIG. FIG. 6 is a partial longitudinal sectional view showing a state in which the lock member 8 is pushed down by the tool 18 to be detached from the locking portion 12 and the iron lid 4 is slightly lifted in the iron lid opening / closing structure shown.
[0010]
1 and 2, a cylindrical (hollow) casing (embedded casing main body) 1 embedded in the basement has an annular (square annular in the illustrated example) receiving frame portion 2 having an opening at the upper end surface. An iron lid 4 having the same shape (square shape) is fitted and supported (mounted in a closed state) in the opening 3 of the receiving frame portion 2. The receiving frame portion 2 and the iron lid 4 are usually made of a cast product such as ductile cast iron. Further, the embedded housing body 1 can be made of concrete, hard plastic, or the like in addition to cast iron.
[0011]
The iron lid 4 is connected to the receiving frame portion 2 at a part (one side) of the peripheral edge portion of the iron lid 4 via a connecting member 5 formed of a wedge, a chain, a rod, or the like. An iron lid support portion 6 for supporting (fitting support) the iron lid 4 is formed inside the receiving frame portion 2 along the peripheral edge of the opening 3. The iron lid 4 is supported by the iron lid. It is supported on a sealing member (packing) 7 of a rubber-like elastic body (for example, made of urethane rubber) mounted on the upper surface of the portion 6.
[0012]
A lock member 8 is pivotally supported on the back surface of the iron lid 4 so as to be swingable. The lock member 8 (FIGS. 3, 4 and 5) has left and right pin portions (projections) 9 and 9 provided on the lock member, and left and right L-shaped grooves 10 formed on the iron lid 4. 10 is pivotally supported so as to be swingable between a lock position (locking position) as shown in FIG. 2 and a lock release position (release position shown in FIGS. 9 and 10). . At the position corresponding to the lock member 8 of the iron lid support portion 6 of the receiving frame portion 2, the iron cover 4 is locked by the front end hook portion 11 of the lock member being locked while the iron lid 4 is closed. A locking portion 12 is formed for this purpose.
[0013]
On the back surface of Tetsufuta 4, the locking member 8 (in FIG. 2, the clockwise direction outward) in the direction in which engaged with the engaging portion 12 returns to the elastic biasing (spring biased) spring 13 is attached. In the illustrated example, the return spring 13 is constituted by a torsion coil spring (FIG. 7) attached to a shaft 14 (FIG. 6) attached to the back surface of the iron lid 4. Further, the iron lid 4 is provided with a handle member 15 (FIG. 8) that can be used to unlock the lock member 8 and lift the iron lid. The handle member 15 is constituted by a gate-shaped rod member (U-shaped bolt or the like), and the vertical portions (gate column portions) 21 on both sides thereof are passed through through holes 20 formed in two locations of the iron lid 4 and the iron lid. 4, the vertical portions on both sides are mounted (inserted) so as to be engageable with the lock member 8 by a nut or a retaining ring fixed to the tip.
[0014]
Therefore, by lifting this handle member 15 from the upper side of the iron lid 4, the lock member 8 is rotated counterclockwise as shown in FIG. 4 can be unlocked so that it can be opened. When the handle member 15 is dropped or pushed into the iron lid 4, the lock member 8 rotates clockwise around the pin portion 9 by the spring force of the return spring 13, and the hook portion 11 is locked. The iron lid 4 can be locked (locked) in the closed position by being locked to the portion 12.
[0015]
1 and 2, an opening (notch, bar opening) 16 is formed at a position corresponding to the lock member 8 at the peripheral edge of the iron lid 4. 2 is provided with a closing portion 17 that closes the opening 16 when the iron lid is closed as shown in FIG. Therefore, by inserting the tool 18 from the opening 16 and pressing the closing portion 17 downward, the lock member 8 is rotated counterclockwise to disengage the hook portion 11 from the locking portion 12, and the iron lid 4 Can be unlocked (openable state). That is, the same operation as the unlocking operation of the iron lid 4 by the handle member 15 can also be performed by inserting an appropriate tool 18 through the opening 16 and pressing the lock member 8.
[0016]
When the iron cover is closed and the embedded housing is in use, the iron cover 4 is received and attached to the opening 3 of the frame 2 with the lock member 8 rotated in the unlocking direction as shown in FIG. 9 or 10. The lock member 8 is automatically locked to the locking portion 12 by the spring force of the return spring 13, and the iron lid 4 is automatically locked.
Further, the iron lid 4 is placed at a position opposite to the lock member 8 by engaging with the lower edge of the opening 3 of the receiving frame portion 2 when the iron lid is mounted (when the embedded housing is used). A projection 19 for preventing scattering is formed to make the removal of the lid 4 more reliable. In this embodiment, as shown in FIG. 1, the protrusions 19 are formed at two locations on the opposite side of the lock member 8 with a predetermined interval.
[0017]
In the embodiment described above, in the iron lid opening / closing structure for detachably mounting the iron lid 4 on the receiving frame portion 2 provided in the upper part of the casing 1 buried underground, the inside of the receiving frame portion 2 is provided. A lock member 8 that is pivotally supported (pin portion 9) on the back surface of the iron lid 4 so as to be swingable in the locking and disengaging directions with respect to the formed locking portion 12, and can be operated from the upper surface side of the iron lid 4. And a handle member 15 mounted so as to be engageable with the lock member 8 through the through hole 20 of the iron lid, and the locking portion of the frame portion 2 receiving the lock member 8 in conjunction with the operation of lifting the handle member 15 The iron lid 4 is configured to be opened by being detached from the iron 12.
[0018]
Further, in the embodiment described above, the iron lid 4 is locked at the position on the opposite side of the lock member 8 of the iron lid 4 to the lower side of the peripheral edge of the opening of the receiving frame portion 2 when the iron lid is mounted. Protrusions 19 for preventing scattering are formed to prevent detachment. The lock member 8 is configured to be unlocked by pressing with a tool 18 or the like from the upper surface side of the iron lid through an opening 16 formed in the iron lid 4. The lock member 8 is elastically biased in a direction to be locked to the locking portion 12 of the receiving frame portion 2 by a return spring 13 mounted on the back surface of the iron lid 4. The locking portion 12 of the receiving frame portion 2 is formed using an iron lid support portion 6 for supporting the iron lid 4.
[0019]
According to the embodiment described above, the iron lid 4 can be securely attached to the receiving frame portion 2 in the locked state (locked state) when the embedded housing is in use (iron lid closed state), and When the iron lid 4 is opened, an iron lid opening / closing structure is provided that can be easily operated from the road surface. Further, an iron lid opening / closing structure capable of performing the opening / closing operation of the iron lid 4 even when there is no tool such as a bar is provided.
[0020]
In the above embodiment, a rectangular embedded housing has been described as an example, but the present invention can be similarly applied regardless of the shape of the embedded housing, such as a circle, an oval, or a polygon. Similar effects can be achieved. Further, in the present embodiment, the case where the embedded housing body 1 and the receiving frame portion 2 are separate members has been described as an example. However, the present invention also applies to the case where the receiving frame portion is formed integrally with the embedded housing body. It can be applied in the same manner and can achieve the same effect. Also, the embedded housing body may be of various structures such as an integral structure, a stacked structure, or a split structure (such as a two-split structure or a three-split structure) whose height can be adjusted by screws or the like. The present invention can be used in the same manner regardless of the structure of the embedded housing body, and the same effects can be achieved.
[0021]
【The invention's effect】
As apparent from the above description, according to the invention of claim 1, the out-iron lid securely by securely locking (locking) to the receiving frame part of iron lid is closed iron lid There is provided an iron lid opening / closing structure that can be prevented and that can easily open the iron lid without a tool.
[Brief description of the drawings]
FIG. 1 is a plan view showing a state in which an iron lid of a buried housing having an iron lid opening / closing structure to which the present invention is applied is closed.
FIG. 2 is a longitudinal sectional view showing an iron lid opening / closing structure to which the present invention is applied along line 2-2 in FIG. 1;
FIG. 3 is a plan view of the lock member in FIG. 2;
4 is a side view of the locking member of FIG. 3. FIG.
5 is a front view of the lock member of FIG. 3. FIG.
6 is a plan view of the shaft in FIG. 2. FIG.
7 is a front view of the return spring in FIG. 2. FIG.
8 is a front view of the handle member in FIG. 2. FIG.
9 is a partial longitudinal sectional view showing a state in which the handle member is lifted to disengage the lock member from the engaging portion and the iron lid is slightly lifted in the iron lid opening / closing structure shown in FIG. 2;
10 is a partial vertical cross-sectional view showing a state in which the lock member is pushed down by a tool to be detached from the engaging portion and the iron lid is slightly lifted in the iron lid opening / closing structure shown in FIG. 2;
[Explanation of symbols]
1 Case (Built-in case body)
2 Receiving frame 3 Opening (receiving frame)
4 Iron lid 5 Connecting member 6 Iron lid support part (receiving frame part)
7 Sealing member 8 Locking member 9 Pin part 10 L-shaped groove 11 Hook part (locking member)
12 Locking part (receiving frame part)
13 Return spring 14 Shaft 15 Handle member 16 Opening (bar opening, notch)
17 Blocking part (locking member)
18 Tool 19 Splash prevention protrusion (iron cover)
20 Through hole (Iron cover)
21 Vertical part (grip member)

Claims (4)

In the iron lid opening and closing structure for attaching the iron lid to the receiving frame portion provided in the upper part of the housing buried underground, so that the iron lid can be opened and closed,
A locking member pivotally supported on the back surface of the iron lid so as to be swingable in a locking and detaching direction with respect to a locking portion formed inside the receiving frame portion;
An opening that is formed at a position corresponding to the lock member on the peripheral edge of the iron lid and can be closed by the lock member;
A return spring that elastically biases the locking member to the locking portion and elastically biases the opening in the closing direction;
It is inserted into the engaging portion of the lock member so as to be operable from the upper surface side of the iron lid and through the through hole of the iron lid, and is lifted upward to resist the elastic biasing force of the return spring. A handle member arranged so that the iron lid can be lifted while rotating the lock member in a direction away from the locking portion;
With
In conjunction with the operation of lifting the handle member, the lock member is lifted from the latching portion of the receiving frame portion against the elastic biasing force of the return spring, and the iron lid is lifted from the opening. The operation of lifting the iron lid while pressing the lock member downward and detaching the lock member from the latching portion of the receiving frame portion against the elastic biasing force of the return spring. An iron lid opening / closing structure characterized in that the iron lid can be opened.   2. The iron lid according to claim 1, wherein a projection for preventing scattering is formed at a position opposite to the lock member of the iron lid so as to be locked to the receiving frame portion when the iron lid is mounted. Opening and closing structure.   The iron lid opening and closing structure according to claim 1 or 2, wherein the locking portion of the receiving frame portion is formed using an iron lid support portion for supporting the iron lid.   The handle member is formed of a gate-shaped rod member, and the vertical portions on both sides thereof reach the back surface of the iron lid through the through holes formed in the iron lid, and the tip of the vertical portion is engaged with the lock member. The iron lid opening and closing structure according to any one of claims 1 to 3, wherein the iron lid opening and closing structure is mounted so as to be able to be fitted together.

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