JP2630757B2 - Manhole cover opening and closing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for opening and closing a manhole cover provided in the middle of a common ditch or a culvert through which a power line, a telephone line, a water supply and sewage pipe and the like are inserted.

[0002]

2. Description of the Related Art As shown in FIG. 9, the lids K1 to K3 of a conventional manhole M of this type are manually opened and closed by attaching a handle serving as a clue to an embedded nut N of the lid K. However, the lid K is usually installed in a set of three, and the weight is also two.
Since it is very large at 00 Kg, it takes time to open it manually, and there is a risk of dropping the lid.

[0003] Therefore, recently, particularly necessary lids include:
In some cases, a product having an opening / closing device is installed in advance so that it can be easily opened / closed, and a device for mechanically opening a lid has been developed.

[0004]

[Problems to be solved by the invention] However, the lid with the opening and closing device is not widely used because it takes time and cost to manufacture and construct the lid, and the lid is manually opened and closed in actual construction. That is the current situation. In addition, the device for mechanically opening the lid is a large device at present and requires a large construction site, which has been a problem in that it obstructs the passage of roads.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and can be easily opened and closed with a conventional lid.
The object of the present invention is to provide a small and space-saving one, and the gist of the invention is to assemble a plurality of frame members to form a rectangular parallelepiped frame assembly, An apparatus main body having a pulley at the lower end composed of a pair of lid elevating bodies installed via an erect beam member, and a track device on which the apparatus main body travels, and the lid elevating body is rotatable up and down. An elevating bolt with a handle is rotatably screwed into an elevating nut with a rotating lever provided on the beam member so as to be immovable, and the elevating bolt is mounted on a manhole cover at the lower end of the elevating bolt. The track device includes a pair of rails on which the pulleys are mounted, and a detachable belt for fixing and installing the two rails in parallel. Manhole cover In the closed system.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the embodiments shown in FIGS. 1 to 8. In the drawings, reference numeral 1 denotes a movable device main body installed above a manhole M buried in the ground. The apparatus main body 1 is composed of a rectangular parallelepiped frame assembly A formed by a metal prism, and a pair of lid lifting and lowering bodies B, B installed on the upper portion of the frame assembly A. 1 is provided with a track device 6 on which the vehicle travels.

The frame assembly A includes a plurality of rectangular frame members 2.
And bolts, nuts,
It is formed by assembling a plurality of frame members 2 with pins or the like. That is, as shown in FIGS. 1 and 2, the frame member 2 includes a pair of front and rear main frame members 3, 3 located in the movement direction, and side frame members connected to the left and right ends of the main frame members 3, 3. 4, 4 and two connecting frame members 5, 5 which are inside the side frame members 4, 4 and connect the pair of main frame members 3, 3 respectively.

Each of the main frame members 3, 3 is formed by connecting the left and right ends of upper and lower horizontal rails 3A, 3B with vertical rails 3C, 3C, and two inside the vertical rails 3C, 3C. Reinforcement bar 3D,
3D is spaced apart and fixed to the upper and lower horizontal rails 3A, 3B. And the upper and lower horizontal rails 3A, 3B
Can be separated to the left and right at the center, and the portion connected via the attachment plate 3E is fixed by bolts, nuts, pins and the like. The height of the side frame members 4, 4 is the same as the height T of the main frame members 3, 3, but the height t of the connection frame members 5, 5 is the same as the height T of the main frame members 3, 3. Is set lower than the height T.

The lid elevating body B is provided with the manhole M.
The lifting nut 11 provided with a rotating lever 10 is rotated at the center of a beam member 9 installed on the upper horizontal rails 3A, 3A of the pair of main frame members 3, 3. The lifting nut 11 is rotatably screwed into the lifting nut 11 so as to be freely rotatable and mounted upright. The lower end of the lifting bolt 12 Has a screw portion 12A screwed into an embedded nut N provided in a cover K of the manhole M, and a handle 1 at an upper end.
2B are provided respectively.

At the front and rear ends of the beam member 9, tongue pieces 9A, 9A are respectively suspended from an end face thereof, and the tongue pieces 9A are attached to the upper horizontal rail 3A of the main frame members 3, 3. The lid lifting / lowering body B is fixed to the frame assembly A by being inserted into an insertion groove 13 formed by a pair of mounting pieces 13A, 13A separately provided on the outer side surface. Note that 7 in the figure
Are four pulleys fixed to the lower part of the frame assembly A, and are respectively detachably fixed to the lower parts of the vertical bars 3C, 3C of the main frame members 3, 3.

In addition, the track device 6 has the pulley 7
Is composed of a pair of rails 8 and 8 and a belt 14 for connecting the two rails 8 and 8, and the two rails 8 and 8 installed so as to be parallel to each other are connected by the belt 14. Thus, the interval between the two rails 8, 8 does not increase beyond the length of the belt 14. In the figure, reference numeral 15 denotes a connecting plate for connecting the rails 8, 8 in the length direction.

Next, a process of opening the cover K of the manhole M buried in the ground by the apparatus according to the present invention will be described. First, rails 8 are provided on both sides of the manhole M along the parallel direction of the cover K. 8 are arranged in parallel with the rails 8, 8
The belt 1 is attached to the upright projection 8B of the horizontal plate 8A fixed inside the belt.
4 and insert the ring portions 14A formed at both ends, and install the parallel track device C.

Next, the apparatus main body 1 is assembled.
As shown in FIGS. 1 and 2, first, the vertical rails of the side frame members 4, 4 are respectively located between a pair of holding members 3 </ b> F formed at the left and right ends of the pair of front and rear main frame members 3, 3 located in the traveling direction. 4
C and 4C are inserted and connected by tightening with bolts and nuts to form a rectangular shape in plan view. Then, the two connection frame members 5, 5 inside the side frame members 4, 4 are separated from each other and connected between the pair of main frame members 3, 3 by the same means as described above.

As described above, the height t of the connecting frame members 5, 5 is set lower than the height T of the main frame members 3, 3, and the upper horizontal rail of the connecting frame members 5, 5 is provided. 5A is connected to the same position as the upper horizontal rail 3A of the main frame members 3, 3, so that the lower horizontal rail 5B of the connecting frame members 5, 5 is located above the lower horizontal rail 3B of the main frame members 3, 3. . As a result,
The lid K of the manhole M can enter the rectangular frame formed by the lower horizontal rail 3B of the main frame members 3, 3 and the lower horizontal rail 4B of the side frame members 4, 4.

The two lid lifting members B are respectively
The tongue piece 9A of the beam member 9 is connected to the upper horizontal rail 3 of the main frame members 3, 3.
A is inserted into an insertion groove 13 formed by a pair of mounting pieces 13A, 13A on the outer surface of A and fixed. Furthermore, if the pulley 7 is inserted and fixed to the lower part of the vertical bar 3C of the main frame members 3 and 3, and the pulley 7 is installed on the rails 8, 8, the apparatus main body 1 will move along the rails 8, 8. To be able to run freely.

Then, the apparatus main body 1 installed at the place P where the cover K of the manhole M is placed is pushed out to the first cover K1 of the manhole M by human power, and the lifting bolts 12 of the cover lifting body B are lifted. It stops when the screw portion 12A coincides with the embedded nut N of the lid K1. Then, the handle 12B of the lifting bolt 12 of the lid lifting body B is separately rotated, and the screw portion 12A is screwed and fixed to the embedded nut N of the lid K1.

Next, the lifting nut 1 of the lid lifting body B
When the rotary lever 1 is rotated by the rotary lever 10, the lifting bolt 12 is raised, so that the lid K1 is pulled up from the opening O of the manhole M. At this time, the worker needs to be careful that the lid K1 is pulled up horizontally from the opening O of the manhole M. When it is confirmed that the lid K1 has been completely lifted from the opening O of the manhole M to the ground GL, the apparatus main body 1 is manually moved to a place P where the lid K1 is placed.

When the apparatus main body 1 reaches the mounting position P, the rotation lever 10 of the lifting nut 11 is rotated in the reverse direction, and the lid K1 of the manhole M is gently lowered to the ground GL. Next, the handle 12B of the lifting bolt 12 is rotated in the reverse direction, and the screw portion 12A is detached from the embedded nut N of the cover K1 of the manhole M. With the above operation, the opening movement of the cover K1 of the manhole M is completed.

Then, the apparatus main body 1 is moved onto the second lid K2 of the manhole M again, and the second
Is passed over the first cover K1 of the manhole M placed at the place P described above, and is placed beside the first cover K1. Similarly, the third cover K3 of the manhole M also moves to the place P described above, passes over the first cover K1 and the second cover K2 already placed, and passes through the second cover K2. Place next to K2. Therefore, when pulling up the second lid K2 and the third lid K3, it is necessary to lift the manhole M to a sufficient height so as not to hit the first lid K1 of the manhole M.

Next, a case where the cover K of the manhole M is returned to its original state will be described. First, the apparatus main body 1 is moved onto the third cover K3 of the mounting place P, and The handle 12B of the bolt 12 is rotated and screwed and fixed to the embedded nut N of the cover K3 of the manhole M.
Next, by rotating the rotation lever 10 of the lifting nut 11 of the lid lifting body B to raise the lifting bolt 12, the lid K3 of the manhole M is pulled up to a height away from the ground GL.

Thereafter, while the cover K3 of the manhole M is being lifted, the apparatus main body 1 is manually moved to the installation position of the cover K3 of the manhole M. Then, the raising / lowering lever 10 of the raising / lowering nut 11 is rotated in the reverse direction, and the lid K3 of the manhole M is gently lowered into the opening O to close it. By repeating the above operation three times, the closing operation of the lid K is completed.

[0022]

As described above, the manhole cover opening / closing device according to the present invention is constructed by assembling a plurality of frame members to form a rectangular parallelepiped frame assembly and erected above the frame assembly. An apparatus main body having a pulley at the lower end composed of a pair of lid elevating bodies installed via a beam member, and a track device on which the apparatus main body travels, the lid elevating body is rotatable and cannot move up and down. An elevating nut with a handle is rotatably screwed to an elevating nut with a rotating lever provided on the beam member, and the elevating bolt is rotatably screwed upright.At the lower end of the elevating bolt, an embedded nut attached to a manhole cover is attached. The track device is formed of a pair of rails on which the pulleys ride, and a detachable belt for fixing and installing the two rails in parallel. Only when opening and closing the lid The closed device can be brought to the site in a disassembled state and easily assembled, so transport is easy, and the device body can be sized according to the size of the lid, so it can be used even in places where the work space is narrow It is. (2) Since there is no need to apply any processing to the lid, it can be applied to a general-purpose manhole lid as it is.
(3) The lid can be easily lifted horizontally only by the operation of the rotating lever. In addition, since the lid is completely supported by the apparatus main body, there is no danger of the lid being damaged or falling, and the apparatus is not required. Since the main body runs on the rails, the lid can be safely moved with a light force. There are various effects.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a manhole cover opening / closing device according to the present invention.

FIG. 2 is a perspective view of an assembled state of a lid opening / closing device.

FIG. 3 is a plan view of the lid opening / closing device before starting work.

FIG. 4 is a plan view at the start of work.

FIG. 5 is a plan view during work.

FIG. 6 is a plan view at the end of work.

FIG. 7 is a front view of the operation of the lid opening / closing device when the operation is started, as viewed from different directions.

FIG. 8 is a front view at the end of the work.

FIG. 9 is a perspective view showing a general-purpose manhole and a lid thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Device main body A Frame assembly B Lid elevating body 2 Frame member 3 Main frame member 3A Upper horizontal bar 3B Lower horizontal bar 3C Vertical bar 3D Reinforcement bar 3E Attached plate 3F Holding member 4 Side frame member 4B Lower horizontal bar 4C Vertical bar 5 Connection Frame member 5A Upper horizontal rail 5B Lower horizontal rail 6 Track device 7 Pulley 8 Rail 8A Horizontal plate 8B Upright projection 9 Dyeing member 9A Tongue piece 10 Rotating lever 11 Lifting nut 12 Lifting bolt 12A Screw portion 12B Handle 13 Insertion groove 13A Piece 14 belt 14A ring part 15 connecting plate

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akio Takahashi 1-50, Mizusawa Industrial Park, Mizusawa City, Iwate Prefecture Inside Takashu Co., Ltd. (72) Inventor Takashi Ueno 1-7-2 Otemachi, Chiyoda-ku, Tokyo Japan High Frequency Inside the Steel Industry Co., Ltd. (56) References Japanese Utility Model Application No. Sho 64-24152 (JP, U) Japanese Utility Model Utility Model No. 4-33744 (JP, U) Japanese Utility Model Utility Model No. 1-147041 (JP, U)

Claims (1)

(57) [Claims] 1. A frame member having a rectangular parallelepiped shape is formed by assembling a plurality of frame members, and at the lower end comprising a pair of lid elevating members installed via a beam member provided on the upper portion of the frame member. The apparatus includes a device main body having a pulley, and a track device on which the device main body travels. The lid lifting / lowering body is rotatable and cannot move up and down. When the bolt is rotatably screwed upright, a screw portion is formed at the lower end of the lifting bolt to be screwed with a buried nut mounted on a manhole cover. A manhole cover opening / closing device comprising a pair of rails on which a pulley rides, and a detachable belt for fixing and installing the two rails in parallel.