JP3047381B2 - Open / close reversing device for manhole covers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a manhole cover for a manhole, a handhole, or the like which is installed to cope with maintenance and inspection of an underground wiring path for a power line, a communication line, and the like. The present invention relates to an opening / closing reversing device such as a manhole cover which can be detached from a part and opened, and easily turned upside down for cleaning or the like.

[0002]

2. Description of the Related Art Conventionally, maintenance and inspection of an underground wiring route, etc., which is wired underground for power lines, communication lines, etc., are installed along a cave constituting the underground wiring route. It is carried out through a manhole, a handhole, and the like, and the manhole cover is removed from the manhole opening to open the work. The manhole cover itself is made of cast iron, forged steel, or the like to have a considerable thickness, so that the manhole and the like are sufficiently installed on the road surface to withstand the weight of a passing vehicle and other parts, and the manhole is also allowed to pass. It is firmly fixed to the edge of the manhole via an adhesive or the like so as not to rattle depending on the vehicle and generate noise.

In order to open the manhole cover during maintenance and inspection of an underground wiring path, the opening edge of the manhole and the manhole cover are forcibly released by an adhesive, and the opening edge of the manhole cover itself is opened. Need to be removed,
Further, in order to clean the manhole cover itself, for example, to peel off and remove the used solidified adhesive or the like sticking to the manhole cover, the manhole cover itself must be turned upside down. Conventionally, such work is performed by first fixing a stopper on the manhole cover, forcibly lifting it with a jack, forcibly peeling it off from the opening edge, and then hanging a pipe etc. over the opening below the manhole cover. The manhole cover is displaced by using the pipe as a roller, and then it is turned upside down by a few workers.

[0004]

However, as described above, the manhole cover itself is considerably heavy at about 150 to 300 kg, and its diameter is, for example, about 750 to 900 cm. However, it was not easy to perform, and it was troublesome, and there was a danger of falling unexpectedly during work or falling down.

Accordingly, the present invention has been made in view of the above-mentioned circumstances that have existed in the past, and it is possible to easily lift a manhole cover that is bulky in weight and remove it from the opening edge of the manhole. The front and back can be easily reversed by using the opening of, and a series of work can be performed safely without danger by human power without relying on mechanical power,
It is another object of the present invention to provide an opening / closing reversing device such as a manhole cover which is easy to disassemble and assemble, easy to carry into and out of the site, and excellent in handleability.

[0006]

According to the present invention, in order to achieve the above-mentioned object, the left and right rotation centers which are arranged to be movable relative to the outside of both sides of a manhole cover M to be opened and are movable. A fixed shaft 10 having a fixing means 11 fixedly mounted on the manhole cover M, which is supported by the board 1 and the left and right rotation center boards 1 so as to be rotatable, detachably supported, and fixed to the manhole cover M;
It has a gate-shaped undulating operation handle 20 for detachably connecting the left and right rotation center plates 1 to each other. The rotation center plate 1 is provided with a protruding shaft body 4 that rotatably fits the fixed shaft 10 on inner surfaces facing each other, and a handle connecting portion 5 to which an up / down operation handle 20 is removably connected.
In addition, caster seat plates 8 to which casters 9 for moving the rotation center plate 1 itself are fixed can be provided. The fixed shaft 10 is formed in a square pipe shape having a length substantially corresponding to the outer diameter of the manhole cover M, and is fitted between the left and right rotation center plates 1 to the shaft body 4 provided on the rotation center plate 1. By being fitted, the fixed shaft 10 can be mounted so as to be rotatable about a central axis along the length direction of the fixed shaft 10 itself. The fixing means 11 is inserted through the fixing shaft 10 itself, and is formed with a hook hole H formed in the manhole cover M by drilling.
A fixed hook bolt 12 engaged with the hole edge of the hook hole H by rotation after being inserted into the inside, and a fixed nut 1 screwed into the engaged fixed hook bolt 12 and pressed against the surface of the fixed shaft 10.
5 can be used. The up / down operation handle 20 has a lower end serving as an insertion end to be inserted into the handle connecting portion 5 provided on the rotation center plate 1, and an upper end serving as a connection adjustment end. In addition, the insertion connection length is adjusted by the connecting body 21 that fixedly connects the left and right connection adjusting ends, and can be configured so as to be disassembled and assembled so as to have a gate shape as a whole. .

In the reversing device for a manhole cover or the like according to the present invention constructed as described above, the manhole cover M to be opened is fixed to the fixed shaft 10 by the fixing means 11, and the up / down operation handle 20 is Since it is suspended between the left and right rotation center plates 1 arranged on both sides outside of the manhole cover M, the gate-shaped undulating operation handle 20 connecting the rotation center plates 1 to each other is swung. The manhole cover M is lifted away from the opening edge of the manhole by leverage. The manhole cover M lifted by the lever action is fixed to a fixed shaft 10 rotatably supported by the left and right rotation center plates 1 via a shaft 4 provided on the inner surface of the rotation center plate 1. By this, the front and back are inverted around the fixed shaft 10 or the shaft body 4, and the left and right rotation center disks 1 support the manhole cover M and the like at the time of the inversion. The fixing means 11 in the fixing shaft 10 is a fixing hook bolt 1 which is inserted through the fixing shaft 10 itself and is inserted into and engaged with the manhole cover M.
The fixing shaft 10 and the manhole cover M are integrated by the fixing nut 2 and the fixing nut 15 screwed to the surface of the fixing shaft 10 and pressed against the surface of the fixing shaft 10. It does not separate from each other even during reversal The rotation center plate 1 is fixed to a shaft 10 by shafts 4 provided on the left and right inner surfaces.
Is rotatably and detachably supported, and the hoisting operation handle 20 is detachably connected by the handle connecting portion 5, so that the entire assembly and disassembly can be performed, and the bulk is not increased when unnecessary. In addition, the casters 9 provided on the rotation center plate 1 move the lifted manhole cover M away from the manhole,
When re-moving on the manhole for reversing, etc., it is easily performed by its own rolling. Since the undulating operation handle 20 linked between the left and right rotation center plates 1 is of a gate type, the lever effect due to its own swing when the manhole cover M is lifted is sufficiently exerted. The space required for reversing the manhole cover M fixed by the fixing shaft 10 is secured, and the entire movement by the casters 9 provided on the rotary center plate 1 can be easily handled.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a manhole, a handhole, and the like, which are relative to both sides of a manhole cover M to be opened. The left and right rotation center disks 1 are fixed shafts 10 arranged between the left and right rotation center disks and fixed to the manhole cover M.
And a gate-shaped undulating operation handle 20 connected to each of the rotation center plates 1.

The rotation center plate 1 has a bifurcated shape when viewed from the side, and more specifically, has a predetermined thickness in which the long piece 2 and the short piece 3 are connected in an intersecting manner on one surface so as to have a substantially L-shaped outline. Is formed of a plate. On the inner surfaces facing each other, a shaft body 4 for rotatably fitting the fixing shaft 10 is provided, for example, at a substantially central position, which is an intersection, in a protruding manner. And a short piece 3 to which a caster 9 for fixing the caster 9 for moving the rotary center plate 1 itself is provided.

The shaft body 4 is formed of, for example, a round pipe, is inserted completely into the end of the fixed shaft 10, and the fixed shaft 10 itself is rotatable about the shaft body 4. (See FIGS. 4 and 6).

The handle connecting portion 5 is provided with the undulating operation handle 2.
0 is formed in a bottomed cylindrical shape having an inner diameter not smaller than the outer diameter of the end so that the end of the handle can be inserted. Is fixed to the outer surface of the long piece 2 by welding or the like along the longitudinal direction of the long piece 2 together with the reinforcing piece. In addition, the handle connecting portion 5 is provided with a through-hole 6 of a connecting stopper pin 7 which is inserted through both the handle connecting portion 5 and the up-and-down operating handle 20 so as to be connected and fixed to the inserted up-and-down operating handle 20. Have been.

The caster seat plate 8 has a substantially L-shaped cross section reinforced by brace pieces, and the outer surface of one of the caster seat plates 8 is connected to the outer surface of the short piece 3 by welding or the like to the handle connecting portion 5. The casters 9 are fixed and supported by screws or the like on the outer surface of the other piece. The caster 9 has a manhole cover M when the undulating operation handle 20 is positioned in the vertical direction.
Without touching the road surface where the
When 0 is tilted down and down, it comes into contact with the road surface and rolls on the road surface by the up / down operation handle 20.

The fixed shaft 10 is formed in the shape of a square pipe having a length substantially corresponding to the outer diameter of the manhole cover M to be opened, and a shaft is provided between the rotation center plates 1 arranged on both sides of the manhole cover M. By being fitted to the body 4, the fixed shaft 10 is rotatably mounted around a central axis along the length direction of the fixed shaft 10 itself.
The fixing shaft 10 is provided with fixing means 11 for connecting and fixing the manhole cover M. The fixing means 11 is inserted through the fixing shaft 10 itself, and is formed in a rectangular shape formed in the manhole cover M. A fixed hook bolt 12 that is engaged with the hole edge of the hook hole H by rotation after being inserted into the hook hole H, and a fixed screw that is screwed into the engaged hook bolt 12 and pressed against the surface of the fixed shaft 10. And a nut 15.

The fixed hook bolt 12 has an engaging end 13 at the front end thereof, for example, crushed and formed on both wings along the diametrical direction, and has a fixed hook bolt 12 at the rear end substantially in the same direction as the direction of the engaging end 13. It has an operation end 14 which serves as a mark formed by bending the rear end of itself, and a male screw is formed at the center. The fixing nut 15 is screwed into a male screw of the fixing hook bolt 12, and has a bar-shaped knob that is turned upward so that a turning operation by a finger can be performed. The fixing hook bolt 12 in the fixing means 11
Can be inserted through the fixed shaft 10 at the engagement end 13 and inserted into the hooking hole H, and then rotated by approximately 90 degrees, so that the hooking hole H
The presence or absence of the engagement can be confirmed by the direction of the operation end 14.

At both ends of the fixed shaft 10, the fixed shaft 10 fixed to the manhole cover M is rotated by 180 degrees so that the manhole cover M is turned upside down, and the rotation center plate 1 is maintained so as to maintain the inverted state. As a unit to be integrated, a stopper portion 16 having a through-hole for penetrating a stopper pin 17 inserted through both the rotation center plate 1 and the fixed shaft 10 is provided (FIG. 3 (B)). )reference).

Various types of the fixed shaft 10 are prepared in advance as those having different lengths corresponding to the different outer diameters of the manhole cover M. In some cases, the fixed shaft 10 itself may be used. It is also possible to set and adjust corresponding to various manhole covers M which are formed to be stretchable and have different outer diameters.

Further, the raising / lowering operation handle 20 acts as a lever when lifting the manhole cover M fixed to the fixed shaft 10 mounted between the left and right rotation center plates 1 from the opening edge of the manhole as described later. To demonstrate
The manhole cover M is set to a length that does not hinder the rotation of the manhole cover M itself when the manhole cover M is turned upside down, and is bridged between the left and right rotation center plates 1 in a gate shape. is there. The undulating operation handle 20 shown in the figure.
The lower end of the handle connecting portion 5 in the rotation center plate 1
The left and right connection adjustment ends are fixedly connected to each other. The left and right connection adjustment ends are made of a pair of left and right pipes which are made of a substantially L-shaped pipe having an upper end serving as a connection adjustment end. By adjusting the length of the insertion connection by the connecting body 21, it is possible to disassemble and assemble the whole so as to have a gate shape. The connecting body 21 adjusts the insertion connection length of each of the left and right connection adjustment ends, so that the size of the manhole cover M and the length of the fixed shaft 10 that is selected and used correspondingly differ from each other. The respective rotation center plates 1 when the distance between them is adjusted and set correspondingly are firmly and surely connected.

The connecting body 21 itself is formed, for example, in a tubular shape as shown in the figure, and the connecting adjustment ends of the right and left members inserted into the connecting body 21 are fixed by screwing. The connection structure such as screw connection by inserting the other into one of the left and right ones is not particularly limited.

Next, a description will be given of an example of the use of the opening and closing reversing device for a manhole cover or the like according to the present invention constructed as described above. The fixing shaft 10 selected according to the size of the manhole cover M to be opened will be described. Is rotatably supported between the left and right rotation center plates 1 via a shaft 4 so as to be rotatable.
0 is fixedly connected and assembled. On the other hand, the manhole cover M itself is bonded to the opening edge of the manhole by a hook fitting, a jack or the like engaged with the hook hole H or the like of the manhole cover M (both are conventionally performed and not shown). The sticking by such as is released. Therefore, first, the opening and closing reversing device of the present invention is mounted on a caster 9.
The manhole cover M is placed in a state in which the undulating operation handle 20 is almost upright, and the left and right rotation center plates 1 are positioned outside both sides of the manhole cover M. The fixed shaft 10 is fixed to the hook hole H in the manhole cover M by being inserted and engaged by the fixing means 11 (see FIG. 1). Next, the up / down operation handle 20 is turned down (see FIG. 2A), and the upper portion of the up / down operation handle 20 is a point of focus, and the caster 9 is a fulcrum.
The manhole cover M is lifted from the opening edge of the manhole by the lever action of the fixing shaft 10 or the shaft body 4 as an action point (see FIG. 2B). Then, the whole body is moved from the manhole position to open the manhole, the inner lid C is removed, and after the removal, the whole body is moved again to the manhole position, and the shaft 4 or the fixed shaft 10 is moved through the greatly opened manhole opening. The manhole cover M is turned upside down from the center (see FIG. 2B). Thereafter, the stopper pin 17 is inserted through both the rotation center plate 1 and the stopper portion 16 so as to fix the position of the fixed shaft 10 with respect to the rotation center plate 1, and the whole is moved to an appropriate place to clean the back surface of the manhole cover M. For example, cleaning such as removal of a stuck adhesive or the like is performed (see FIG. 3). In addition, after maintenance and inspection of various underground wiring paths and the like are performed by the opened manhole, the manhole cover M may be fixed to the manhole again by the reverse procedure.

[0020]

Since the present invention is constructed as described above, the manhole cover M which is bulky in weight can be easily lifted and removed from the opening edge of the manhole, and the opening of the manhole itself can be utilized. It is easy to turn over the front and back, and a series of operations can be performed safely without human danger without danger, without relying on the mechanical force of a heavy machine such as a crane. In addition, since the fixed shaft 10 and the undulating operation handle 20 can be detachably connected to the left and right rotation center plates 1, the entire disassembly and assembly can be easily performed. is there.

That is, according to the present invention, the manhole cover M is disposed on both sides of the manhole cover M to be opened so as to be opposed to each other.
A left and right rotating center plate 1 which is movable; a fixed shaft 10 having fixing means 11 which is rotatably and detachably supported between the left and right rotating center plates 1 and is fixed to the manhole cover M; This is because there is provided a gate-shaped undulating operation handle 20 for detachably connecting the left and right rotation center boards 1 to each other, whereby safety of work, assembling / disassembling on site, portability, etc. can be obtained.

Since the fixed shaft 10 for fixing the manhole cover M and the gate-shaped undulating operation handle 20 are connected to each other between the left and right rotation center plates 1, the undulating operation handle 2 is provided.
With the swinging up and down movement of 0, the manhole cover M, which is bulky by leverage with the caster 9 provided on the rotating center plate 1 as a fulcrum and the fixed shaft 10 as an operating point, is used as a force point for the up / down operation handle 20, and the opening edge of the manhole. It is very easy to lift with human power away from the part.

Since the fixed shaft 10 is rotatably supported by a shaft 4 provided on the inner surface of the left and right rotation center plates 1, the manhole cover M lifted by a lever action.
Can be turned around the fixed shaft 10 or the shaft body 4 as a center. In addition, this reversing work is performed by moving the lifted manhole cover M to the manhole opening portion where the inner cover C is removed after the manhole cover M is detached from the manhole by the casters 9 of the rotating center plate 1 and moved. Since it can be performed between the rotating center plates 1 arranged outside, it can be performed while being firmly supported by the rotating center plate 1, and can be safely prevented from rolling or inverting unexpectedly. You can do it in

The fixed shaft 10 includes a fixed hook bolt 12 inserted through the fixed shaft 10 itself and inserted into the manhole cover M, and a fixed nut 15 screwed to the fixed nut 15 and pressed against the surface of the fixed shaft 10. Since the fixing means 11 is provided, the fixing shaft 11 and the manhole cover M can be integrated by the fixing means 11, and the manhole cover M is lifted by a lever action by the undulating operation handle 20, and the fixing shaft 10 is moved. The manhole cover M is firmly fixed and supported without causing the manhole cover M to separate even at the time of the reversal centering.

The rotating center plate 1 is provided on its left and right inner surfaces with a shaft 4 for rotatably and removably supporting the fixed shaft 10 and for attaching and detaching an up / down operation handle 20 in a detachable manner. Since the connecting portion 5 is provided, the rotation center disk 1, the fixed shaft 10, the undulating operation handle 20
It can be disassembled into pieces, etc., and can be carried without being bulky when not needed, and can be assembled after being brought to the site, so it is easy to handle and extremely convenient in combination with the fact that it does not require mechanical force when used. . Not only that, but also the manhole cover M is lifted up by the casters 9 provided on the rotary center plate 1 by pulling, pushing or the like of the undulating operation handle 20 linked between the left and right rotary center plates 1 to move away from the manhole. Also, the operator can easily re-move the manhole on the manhole for reversing, and the entire movement can be easily handled.

Further, since the undulating operation handle 20 linked between the left and right rotation center plates 1 is formed in a gate shape,
When the manhole cover M is lifted by its own swing when it is lifted, the manhole cover M, which becomes the point of force and can be easily lifted up with a slight force, can be easily lifted. When the manhole cover M is turned over at the opening after the manhole cover M is moved to the opening of the opened manhole, a space required for turning over the manhole cover M fixed by the fixing shaft 10 between the rotation center plates 1 is secured. It can also be done.
The undulating operation handle 20 is composed of a pair of left and right sides that are substantially L-shaped, and the insertion connection length is adjusted by a connection body 21 that fixedly connects the left and right connection adjustment ends. Therefore, it is possible to assemble the manhole cover M having different sizes to correspond to the respective diameters.

[Brief description of the drawings]

FIG. 1A is a front view of a use set state according to an embodiment of the present invention, and FIG. 1B is a plan sectional view taken along the line aa in FIG.

FIG. 2 is a side view showing a use state, in which (A) is a set state and (B) is a state in which a manhole cover is removed from the manhole and lifted.

FIG. 3A is a side view in a state where the manhole cover is inverted, and FIG. 3B is a front sectional view of a main part along line bb in FIG. 3A.

FIG. 4 is a front view of a main part in a state where it is set on a manhole cover.

FIG. 5 is a plan view of a main part in the same manner.

FIG. 6 is a side sectional view showing a fixing means for fixing the fixing shaft and the manhole cover.

[Explanation of symbols]

C: Middle lid H: Hook hole M: Manhole lid 1: Rotation center board 2: Long piece 3: Short piece 4: Shaft 5: Handle connecting part 6: Penetrating hole 7: Linking stopper pin 8: Caster seat plate 9: Caster 10 ... Fixed shaft 11 ... Fixing means 12 ... Fixed hook bolt 13 ... Engagement end 14 ... Operation end 15 ... Fixed nut 16 ... Stopper part 17 ... Stopper pin 20 ... Undulating operation handle 21 ... Connected body

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Eisaku Shimizu 4-8-33 Shibaura, Minato-ku, Tokyo Inside the Kandenko Co., Ltd. (72) Inventor Mamoru Kuruma 4-83-33 Shibaura, Minato-ku, Tokyo Stock (72) Inventor Takehiro Suzuki Takeshi Suzuki Hiratsuka Shirai 2nd Industrial Park, Shirai-cho, Inba-gun, Chiba Pref.Shirai Plant, Doi Works Co., Ltd. (72) Inventor Kenichi Kikunaga Hiratsuka-Shirai, Shirai-cho, Inba-gun, Chiba 2nd Industrial Park Shirai Plant, Doi Manufacturing Co., Ltd. (72) Inventor Yuki Tonabe Hiratsuka Shirai 2nd Industrial Park, Shirai Town, Inba-gun, Chiba Prefecture 56th inside Doi Manufacturing Co., Ltd.Shirai Plant (56) References JP 8-13526 (JP, A) Japanese Utility Model Showa 64-57139 (JP, U) Japanese Utility Model Application Hei 6-49533 (JP, U) Japanese Utility Model Showa 60-96449 (JP, U) Japanese Utility Model Utility Model Hei 6-27729 (JP, U) Kaihei 1-169593 ( JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) E02D 29/12 E03F 5/02-5/04

Claims (5)

(57) [Claims] 1. A left and right rotating center plate which is disposed on both sides outside of a manhole cover to be opened and is movable relative to each other, and is rotatably and detachably supported between the left and right rotating center plates. Opening and closing of a manhole cover or the like, comprising: a fixed shaft which is horizontally mounted and has fixing means fixed to the manhole cover, and a gate-shaped undulating operation handle which detachably connects the left and right rotation center plates to each other. Reversing device. 2. A rotation center plate is provided with a protruding shaft body for rotatably fitting a fixed shaft to inner surfaces facing each other, a handle connecting portion to which an up / down operation handle is removably connected, and the rotation center. The opening / closing reversing device for a manhole cover or the like according to claim 1, further comprising a caster seat plate to which a caster for moving the board itself is fixed. 3. The fixed shaft is formed in the shape of a square pipe having a length substantially corresponding to the outer diameter of the manhole cover, and is fitted to a shaft provided on the rotation center plate between the left and right rotation center plates. The opening / closing reversing device for a manhole cover or the like according to claim 1 or 2, wherein the fixing shaft is rotatably mounted around a center axis along the length direction of the fixed shaft itself. 4. A fixing hook bolt which is inserted into the fixing shaft itself and is engaged with a hole edge of the hooking hole by rotation after being inserted into a hooking hole formed in the manhole cover. 4. The opening / closing reversing device for a manhole cover or the like according to claim 1, further comprising a fixing nut screwed into the fixed hook bolt after the engagement and pressed against the fixed shaft surface. 5. The left and right pair of left and right operating handles, each of which has an L-shaped lower end having an insertion end inserted into a handle connecting portion provided on a rotation center plate and an upper end serving as a connection adjustment end. And wherein the insertion connection length is adjusted by a connecting body for fixedly connecting the left and right connection adjusting ends, so that the whole can be disassembled and assembled so as to have a gate shape. 4. The open / close inverting device for a manhole cover or the like according to any one of 4.