JP3741409B2 - Iron lid opening and closing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an iron lid opening and closing device for opening and closing an iron lid supported by a receiving frame portion provided at an upper end near the ground surface of a hollow structure embedded in the ground.
[0002]
[Prior art]
In particular, underground pipes for supplying water, gas or electricity are buried underground in urban areas or the suburbs, and control pipes such as switching valves or connectors and breakers are appropriately installed in these pipes. They are connected, and they need to be operated from the road surface, inspected, inspected, protected, and clearly set up. For this purpose, a hollow housing having a hollow structure is installed in a buried state in the ground. In the case of a manhole, a similar buried case may be installed.
[0003]
The upper end opening in the vicinity of the ground (road surface) of the hollow structure installed in the ground is covered with an iron lid so as to be opened and closed. This iron lid is fitted and supported at substantially the same height as the road surface (ground) by the iron lid support surface of the receiving frame provided at the upper end of the hollow structure. The iron lid is connected to the receiving frame portion so as to be openable and closable by an iron lid coupling structure, and the one side portion is lifted and rotated upward to open the opposite side portion. It is connected to the receiving frame portion so as to be rotatable.
[0004]
[Problems to be solved by the invention]
However, the conventional structure of this type of iron lid connection structure requires a special and large jig for lifting and opening the iron lid or positioning and closing the iron lid in the frame, and the work is very difficult. However, there is a technical problem that is difficult to handle due to poor workability.
[0005]
The present invention has been made in view of such a technical problem, and an object of the present invention is to provide an opening / closing means for opening / closing the iron lid in a compact configuration and provided on the iron lid itself. It is an object to provide an iron lid opening / closing device that does not require a special jig for opening and closing work to open the lid and is excellent in workability and handling.
[0006]
[Means for solving problems]
In order to achieve the above object, the present invention (Claim 1) is an iron lid opening and closing device for opening and closing an iron lid supported by a receiving frame portion provided at an upper end portion of an embedded hollow structure. A lock member supported so as to be rotatable about the vertical axis with respect to the lid, and fitted so as to be slidable while being prevented from coming off in the vertical direction with respect to the lock member and to be rotatable integrally with the lid. And a handle member that extends through the opening of the iron lid so as to be rotatable about a vertical axis, and is formed at an upper portion of the lock member at a first rotation position of the lock member. The iron lid is closed with respect to the receiving frame portion by sandwiching a part of the iron lid and a part of the receiving frame portion between the flange portion and the engaging protrusion formed at the lower portion of the lock member. In the second rotational position of the locking member. Flange formed on the upper portion of the click member is characterized in that the release and iron lid the lock only then to engage a portion of the iron lid allows the lid opening by the handle member.
[0007]
According to a second aspect of the invention, in addition to the configuration of the first aspect, the handle member is slidably fitted in the through hole of the lock member via an axial concavo-convex engaging portion in an axial direction. The above-described object is achieved by a configuration comprising a rod-shaped main body portion, a grip portion provided at the upper end portion of the rod-shaped main body portion, and a retaining stopper portion provided at the lower end portion of the rod-shaped main body portion. Is.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view taken along line 1-1 in FIG. 4 showing a state in which an iron lid of a buried housing provided with an embodiment of an iron lid opening / closing device to which the present invention is applied. FIG. 3 is a longitudinal sectional view showing a state in which the iron lid is opened in the embedded housing of FIG. 1, FIG. 3 is a longitudinal sectional view taken along line 3-3 in FIG. 4, and FIG. 4 is a plan view of the embedded housing of FIG. FIG. 5 is a partial longitudinal sectional view showing the iron lid lock state of the main part of one embodiment of the iron lid opening / closing apparatus to which the present invention is applied, and FIG. 6 is the main part of the iron lid opening / closing apparatus of FIG. It is a fragmentary longitudinal cross-section which shows the iron lid unlocking (unlocking) state.
[0009]
1 to 6, the upper end surface of a hollow structure (buried structure, buried housing) 1 such as a tubular water control valve housing or a manhole embedded in the basement (rectangular section tubular shape in the illustrated example). Is provided with an annular (square in the illustrated example) receiving frame portion 2 having a central opening, and an iron lid 3 having a similar shape (rectangular shape) is fitted into the opening portion of the receiving frame portion 2. It is supported. Reference numeral 4 in the figure illustrates the height position of the ground (or road surface). The receiving frame portion 2 and the iron lid 3 are usually made of a cast product such as ductile cast iron, and the embedded housing (hollow structure) 1 is made of concrete (resin concrete or the like) according to its structure and size. It can be made of various materials such as special concrete) and cast products (such as cast iron). Further, when the receiving frame portion 2 is provided integrally with the embedded housing 1, both are formed of the same material.
[0010]
The iron lid 3 can be opened and closed (or lifted) at a part of its periphery (one short side in the illustrated example) with respect to the receiving frame 2 via an iron lid coupling means 10 comprising a link mechanism. ). In the example shown in the drawing, the iron lid connecting means 10 is constituted by connecting portions provided in two rows at a predetermined interval in a parallel state, but this is a connecting portion provided at one place or three or more places. It may be configured. An iron lid opening / closing device 50 with a handle is provided on the side opposite to the side where the iron lid coupling means 10 is provided (opposite side). The iron lid opening / closing device 50 is for locking the iron lid 3 in the closed position of FIG. 1 and releasing the lock to lift and open the iron lid 3.
[0011]
The iron lid coupling means 10 is configured to couple the iron lid 3 to the receiving frame portion 2 via two link members 11 and 12. That is, the iron lid 3 is connected to the receiving frame portion 2 via the first and second link members 11 and 12 connected by the horizontal connecting shaft 13. And the said 1st link member 11 is rotatably connected with the horizontal direction connection axis | shaft 14 provided in the inside of the said receiving frame part 2 by the other end part, The said 2nd link member 12 is The other end is rotatably connected to a horizontal connecting shaft 15 provided inside the iron lid 3.
[0012]
1 to 6, the iron lid opening / closing device 50 includes a lock member 51 and a handle member 52. The handle member 52 includes a rod-like main body portion 53 extending in the vertical direction, a handle portion 54 provided at the upper end portion of the rod-like main body portion, and a retaining stopper portion 55 provided at the lower end portion of the rod-like main body portion. Yes. On the other hand, the lock member 51 is fitted to the rod-like main body portion 53 so as to be slidable in the vertical direction, and a cylindrical main body portion 56, a flange portion 57 provided at an upper end portion of the cylindrical main body portion, and the cylinder. It is comprised with the arm part (engagement protrusion part) 58 provided in the lower end part of the main body part.
[0013]
The handle member 52 has a rod-like main body portion 53 extending through an opening (through hole) 64 (FIGS. 5 and 6) formed in the iron lid 3, and a handle portion 54 at the upper end thereof as shown in the drawing. It is located on the upper side (outer surface) of the iron lid 3. Further, the inner diameter of the lock member 51 and the outer diameter of the rod-like main body 53 are adapted to engage both 51 and 53 so that they rotate integrally in the rotational direction but are slidable in the axial direction. Concave and convex engaging portions (a concave groove portion and a convex strip portion extending in the axial direction) are provided. The lock member 51 is mounted by the handle portion 54 and the stopper stopper portion 55 so as not to fall out of the rod-shaped main body portion 53.
[0014]
In the iron lid lock state shown in FIGS. 1 and 5, the lock member 51 has a part of the receiving frame portion 2 and one of the iron lids 3 between the flange portion 57 and the engagement projection portion (arm portion) 58. The iron lid 3 is locked in the illustrated closed state. When the iron lid 3 is opened, the gripping member 54 is lifted from the road surface (ground) to lift the gripping member 52 and rotated by a predetermined angle, thereby unlocking the engaging protrusion 58 as shown in FIG. Next, the handle member 52 is further lifted to lift the iron lid 3 through the lock member 51, and the iron lid 3 faces upward while utilizing the link operation of the iron lid connecting means 10. To open the iron lid as shown in FIG.
[0015]
The engagement protrusion (arm) 58 is a part of the iron lid 3 and the receiving frame between the flange 57 and the flange 57 as shown in FIG. 5 by rotating the lock member 51 by the handle member 52. By simultaneously sandwiching a part of the part 2 and locking the iron cover 3 in the closed position, as shown in FIG. 6, the part is disengaged from the lower surface of the part (engagement part) of the iron cover 3. It is selectively set to an unlock position (lock release position) where the flange portion 57 only engages the iron lid 3. In the illustrated example, an overhanging portion 67 for fitting and supporting the iron lid 3 is formed on the inner peripheral surface of the receiving frame portion 2, and the upper surface of the overhanging portion 67 is between the iron lid 3 and the upper surface. A packing 68 for sealing is attached.
[0016]
When the iron lid is locked, as shown in FIG. 5, the iron projection 3 is locked (fixed) in the closed position by the engagement protrusion (arm portion) 58 being positioned below the overhanging portion 67. It is supposed to be. When the iron lid is unlocked (unlocked), as shown in FIG. 6, the locking member 51 is rotated via the handle member 52, so that the engaging protrusion (arm portion) 58 is moved. The lock member 51 is detached from the lower surface of the overhanging portion 67 so that the lock member 51 is engaged only with the iron lid 3.
[0017]
Therefore, when opening the iron lid 3, as described above, the handle member 52 is lifted to bring the engaging projection 58 into the unlocked (unlocked) position as shown in FIG. The iron lid 3 is lifted through the lock member 51 by further lifting, and the iron lid 3 is rotated upward while utilizing the link operation of the iron lid coupling means 10, and an iron as shown in FIG. Open the lid.
[0018]
In the iron lid open state shown in FIG. 2, the upper surface of the iron lid 3 abuts on the inner peripheral edge 19 at the upper end of the receiving frame portion 2 on the iron lid coupling means 10 side, and the iron lid 3 faces upward as shown in the figure. It is held in the open position with a stable posture inclined in the direction. 2, the angle α (FIG. 2) between the lower surface (inner surface) of the iron lid 3 and the upper end surface of the receiving frame portion 2 is preferably set to about 135 degrees. The reason is that consideration has been given to the stable holding of the iron lid 3 at the open position and the ease of opening and closing the iron lid 3. And according to such an iron lid opening and closing device 50, the opening and closing means for opening and closing the iron lid 3 can be provided on the iron lid itself with a compact configuration, and a special opening and closing for opening the iron lid 3 An iron lid opening / closing device excellent in workability and handleability can be obtained without requiring a working jig.
[0019]
FIG. 7 is a plan view (a) of the locking member 51 and a longitudinal sectional view (b) of the central portion along the line bb. In FIG. 7, the lock member 51 includes a cylindrical main body portion 56, a flange portion 57 provided at the upper end portion of the cylindrical main body portion, and an engagement protrusion (arm portion) provided at the lower end portion of the cylindrical main body portion. 58), and a through hole 61 is formed at the center of the cylindrical main body 56. And the recessed part 62 which consists of a longitudinal direction groove | channel is formed in the position (two places) which the internal peripheral surface of this through-hole 61 opposes. As shown in FIGS. 5 and 6, the flange portion 57 is always engaged with a part of the upper surface of the iron lid 3 and another part of the lower surface.
[0020]
FIG. 8 is a front view (a) and a side view (b) of the handle member 52. In FIG. 8, a handle member 52 includes a rod-like main body 53, a handle portion (handle portion) 54 provided at the upper end portion of the rod-like main body portion, and a stopper stopper 55 provided at the lower end portion of the rod-like main body portion. Convex portions 63 made of longitudinal ridges are provided at opposing positions (two locations) on the outer peripheral surface of the rod-shaped main body 53. The convex portion 63 engages with a concave portion 62 formed by a longitudinal groove on the inner diameter surface of the lock member 51 so as to be slidable in the axial direction. Thus, the lock member 51 rotates integrally with the handle member 52, but is mounted so as to be slidable (slidable) in the axial direction. The rod-shaped main body 53 protrudes toward the upper surface (outer surface) of the iron lid 3 through a hole (opening) 64 formed in the iron lid 3 as shown in FIGS. 1, 2, 5, and 6. Therefore, the handle portion 54 is always located on the upper surface (outer surface) side of the iron lid 3, and is normally formed on the upper surface of the iron lid 3 as shown in FIGS. The recessed portion 65 (FIGS. 5 and 6) is fitted and held.
[0021]
FIG. 9 is a partial longitudinal sectional view taken along line 9-9 in FIG. 10 of a portion of the iron lid 3 to which the lock member 51 and the handle member 52 are attached, and FIG. 10 shows the iron lid 3 in FIG. It is the partial bottom view seen from below along line 10-10. 9 and 10, an opening (hole) 64 is a hole through which the rod-like main body 53 of the handle member 52 is inserted, and a U-shaped protruding portion 66 is formed below the opening at a predetermined interval. The flange portion 57 of the lock member 51 fitted to the rod-like main body portion 53 is located in the space between the peripheral portion of the opening 64 and the overhanging portion 66 as shown in FIGS. The lock member 51 is attached to the iron lid 3 side together with the handle member 52.
[0022]
According to the embodiment described above, in the iron lid opening / closing device 50 for opening and closing the iron lid 3 supported by the receiving frame portion 2 provided at the upper end portion of the embedded hollow structure 1, On the other hand, the lock member 51 is supported so as to be rotatable around the vertical axis, and is fitted to the lock member so that the lock member 51 is prevented from coming off in the vertical direction and is slidable and can be rotated integrally around the vertical axis. And a handle member 52 that extends through the opening 64 of the iron lid 3 so as to be rotatable about a vertical axis, and in the first rotation position of the lock member 51, an upper portion of the lock member. A part of the iron lid and a part of the receiving frame part are sandwiched between a flange part 57 formed on the locking member and an engaging protrusion 58 formed on the lower part of the lock member, whereby the iron cover is received by the receiving frame. The locking member 51 is locked in the closed position. 2, the flange portion 57 formed on the upper portion of the lock member only engages a part of the iron lid 3 to release the lock, and the handle member 52 opens the iron lid 3. An iron lid opening / closing device 50 that can be covered is obtained.
[0023]
In the above embodiment, the case where the iron lid 3 (and the receiving frame portion 2) is a rectangular cross-section embedded housing is illustrated, but the present invention is a cross-section of the embedded housing such as a circular cross section or a polygon cross section. It can be widely applied regardless of the shape, and the same effect can be obtained. It can be widely applied regardless of the type, structure (integrated type, stacked structure, internal / external fitting type, etc.), size, purpose of use, etc. It is. Furthermore, the present invention can be similarly applied to the case where the receiving frame portion is formed integrally with the hollow structure, and the same operational effects can be obtained.
[0024]
【The invention's effect】
As is clear from the above description, according to the present invention (Claim 1), in the iron lid opening and closing device for opening and closing the iron lid supported by the receiving frame portion provided at the upper end portion of the embedded hollow structure. A lock member supported so as to be rotatable about a vertical axis with respect to the iron lid, and slidably supported by the lock member in a vertical direction and rotated integrally around the vertical axis. A handle member that is fitted to the iron cover and extends through the opening of the iron lid so as to be rotatable about a vertical axis, and at an upper position of the lock member at a first rotation position of the lock member. By sandwiching a part of the iron cover and a part of the receiving frame part between a flange part formed on the lower part of the locking member and an engaging protrusion formed on the lower part of the locking member, the iron cover is attached to the receiving frame part. The second locking position of the locking member Then, since the flange portion formed on the upper portion of the lock member only engages with a part of the iron lid, the lock is released and the iron lid can be opened by the handle member. Opening and closing means for opening and closing the iron lid can be provided on the iron lid itself with a compact configuration, and no special opening and closing work jig for opening the iron lid is required, improving workability and handling An excellent iron lid opening and closing device is provided.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view taken along line 1-1 in FIG. 4 showing a state in which an iron lid of an embedded housing provided with an embodiment of an iron lid opening / closing device to which the present invention is applied;
2 is a longitudinal sectional view showing a state in which an iron lid is opened in the embedded housing in FIG. 1. FIG.
3 is a longitudinal sectional view taken along line 3-3 in FIG.
4 is a plan view of the buried enclosure in FIG. 1. FIG.
FIG. 5 is a partial longitudinal sectional view showing an iron lid lock state of a main part of an embodiment of an iron lid opening / closing device to which the present invention is applied.
6 is a partial vertical cross-sectional view showing a state where the lock of the iron lid of the main part of the iron lid opening / closing device of FIG. 5 is released.
7 is a plan view (a) of the locking member in FIG. 1 and a longitudinal sectional view (b) of a central portion taken along line bb. FIG.
8 is a front view (a) and a side view (b) of the handle member in FIG. 1. FIG.
9 is a partial vertical cross-sectional view taken along line 9-9 in FIG. 10 of a portion where the lock member and the handle member are mounted on the iron lid in FIG.
10 is a partial bottom view of the iron lid viewed from below along the line 10-10 in FIG. 9;
[Explanation of symbols]
1 Hollow structure (buried enclosure)
2 Receiving frame part 3 Iron cover 4 Ground (road surface)
DESCRIPTION OF SYMBOLS 10 Iron cover connection means 11 Link member 12 Link member 13 Horizontal direction connection shaft 14 Horizontal direction connection shaft 15 Horizontal direction connection shaft 50 Iron cover opening / closing device 51 Lock member 52 Handle member 53 Bar-shaped main-body part (handle member)
54 Handle part (handle member)
55 Stopper stopper (grip member)
56 Cylindrical body (locking member)
57 Flange (Lock member)
58 Engaging projection (arm)
61 Through hole (locking member)
62 Longitudinal groove (locking member)
63 Longitudinal protrusion (handle member)
64 holes (opening)
65 Recess 66 Overhang (Iron cover)
67 Overhang (receiving frame)
68 Packing

Claims (2)

In an iron lid opening and closing device for opening and closing an iron lid supported by a receiving frame portion provided at an upper end portion of an embedded hollow structure,
A lock member that is supported so as to be rotatable about the vertical axis with respect to the iron lid, and can be slidably supported by the lock member in a vertical direction and can be rotated integrally around the vertical axis. And a handle member extending through the opening of the iron lid and extending freely around the vertical axis,
In the first rotation position of the lock member, a part of the iron lid and the receiving frame are formed between a flange portion formed on the upper portion of the lock member and an engagement protrusion formed on the lower portion of the lock member. Locking the iron lid in a closed position with respect to the receiving frame by sandwiching a part of the part,
In the second rotation position of the lock member, the flange formed on the lock member only engages with a part of the iron cover to release the lock, and the iron cover is moved by the handle member. An iron lid opening and closing device characterized in that the lid can be opened. The handle member includes a rod-like main body portion that is slidably fitted in the axial direction with respect to the through hole of the lock member via an axial concavo-convex engagement portion, and a handle provided at an upper end portion of the rod-like main body portion. The iron lid opening and closing device according to claim 1, further comprising a stopper and a stopper stopper provided at a lower end of the rod-shaped main body.

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