JP2008095411A - Manhole cover operating method, manhole cover operating device, and manhole cover operating device assembling method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a worker to lift a manhole cover, turn over the lifted manhole cover move the turned-over manhole cover in a sequential action simply and easily even by human power. <P>SOLUTION: The manhole cover operating device comprises a movable body base 1 which is arranged outside of an opening part which is covered by the manhole cover C to be operated, a lifting member 10 having a linkage support shaft 15 at the lower end detachably connected to the manhole cover C and having a guide means 30 including guide rollers 35 at upper and lower positions of a rear part, and a lifting operation member 40 which is connected and fixed to a rear part of the body base 1 in a standing state, and is provided with guide posts 45 including a lifting mechanism 51 for moving the lifting member 10 itself up and down by engaging the guide rollers 35. The device is assembled by arranging the lifting member 10 inside the body base 1, connecting and fixing the lower part of the lifting operation member 40 to the body base 1 and engaging the guide posts 45 with the guide rollers 35 of the guide means 30. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention provides a series of operations such as lifting the manhole cover from the opening / closing position of the manhole opening, inverting the lifted manhole cover, moving the inverted manhole cover, etc. The present invention relates to a manhole cover opening / closing method and an opening / closing device for assembling the opening / closing device.

  Conventionally, it is very difficult to remove a manhole cover having a weight of, for example, about 163 kg from the opening / closing installation position of the manhole opening where the manhole cover is installed, and lift and move it. A manhole cover opening and closing device is provided. For example, as disclosed in Patent Document 1, a connecting member that is detachably connected to a manhole cover via a hook member is connected to a carriage by a link member, and the link member is pushed up horizontally by an actuator. The device exists.

  Further, as disclosed in Patent Document 2, the inner frame is swung with a jack around the pivot portion with respect to the outer frame, the pivot portion is used as a fulcrum, the jack position is a force point, and the frame is attached to the inner frame. There is a manhole cover opening / closing device that can be moved after the manhole cover is lifted substantially horizontally by the lever action of the inner frame by using the position of the hook means as a load application point.

  Further, as disclosed in Patent Document 3, a manhole cover that opens and closes the manhole cover in a substantially horizontal state by engaging the hook with the keyhole of the manhole cover and then tilting the handle by the lever principle using the wheel as a fulcrum. There are operating tools.

Furthermore, as disclosed in Patent Document 4, a hook bar is penetrating from a long hole of a horizontally long support member fixed to a hydraulic jack body that is movable by a wheel, and a tip hook of this hook bar is dropped. There is a manhole cover opening / closing device that engages with the keyhole of the manhole cover and then moves it horizontally with a jack.
Japanese Utility Model Publication No. 6-32412 Japanese Utility Model Publication No. 58-3883 Japanese Utility Model Publication No. 6-49533 JP 7-279189 A

  However, in such an example of a conventional opening / closing device, in manhole opening / closing work, the fixing material (sealant) that seals the gap at the periphery of the opening is peeled from one side from the opening at the opening / closing position of the manhole cover. However, there is no manhole cover opening and closing device for performing a series of operations such as lifting, lifting, reversing the lifted manhole cover, and moving the reversed manhole cover.

  That is, since most manhole cover opening / closing devices lift the manhole cover horizontally, the entire manhole cover can be peeled off to peel off the sealing material that is filled and sealed between the manhole cover and the installation opening at the periphery of the manhole cover. Since an excessive pulling force for lifting is required, the opening / closing operation itself is very difficult.

  In addition, in the conventional manhole cover opening and closing device, the manhole cover cannot be turned upside down simply by horizontally moving it in a state where the manhole cover is lifted horizontally. It's hard to do. Conventionally, since the upper lid cannot be reversed with the inner lid in the open state, there are various problems such as the risk of dropping dust or the like into the installation opening of the manhole lid when opening and closing. Moreover, in order for the worker to manually lift and reverse the manhole cover, it requires a considerable amount of physical strength, and this imposes an unreasonable posture, which contributes to physical disability.

  Therefore, the present invention was created in view of the existing circumstances as described above, and in the opening / closing operation of the manhole cover, the operation of lifting the manhole cover from the opening / closing installation location while peeling off the sealant etc. on the periphery of the manhole cover The operation of inverting the lifted manhole cover, the operation of moving the inverted manhole cover, and the like can be performed in series. Further, in the lifting operation of the manhole cover, the sealant sealed between the manhole cover and the installation opening can be easily peeled off while being peeled off from one side. In addition, the back of the manhole cover can be easily inspected or cleaned by reversing the manhole cover, and the top cover can be flipped while the inner cover is closed, so that the falling of dust etc. into the opening of the manhole cover can be prevented in advance. Be able to prevent. In addition, a manhole cover opening and closing method and an opening and closing device, and an assembly method for the opening and closing device, which can be easily carried into the work site, can be freely assembled and disassembled, and can be easily operated manually without requiring a power source. The purpose is to do.

In order to solve the above-described problem, in the method for opening and closing the manhole cover according to the present invention, the first step of disposing the movable main body base 1 outside the manhole opening where the manhole cover to be opened and closed is applied. And the second step of fixing the connecting support shaft 15 of the lift member 10 that is connected and supported to the main body base 1 so as to be movable up and down, and the lift member 10 is guided by the lifting mechanism 51 provided in the main body base 1. A third step of guiding and lifting through the means 30; a fourth step of moving the manhole cover C to a predetermined position by the movement of the main body base 1; and repositioning the manhole cover C to the cover position by the movement of the main body base 1 A fifth step of preparation, a sixth step of positioning and fixing the manhole cover C to the manhole opening by lowering the lift member 10, and a manhole cover C Characterized in that it consists of a seventh step of releasing et cooperative support shaft 15.
In the second step, the jack fork 22 of the jack member 20 is fitted into the end opening of the linking support shaft 15, and the sealant around the manhole cover C is peeled off by lifting up with the jack member 20, and the manhole cover is removed from the manhole opening. Cutting C can be included.
The fourth step or the fifth step can include cleaning of the manhole cover C and inspection of the manhole.
Further, the fourth step or the fifth step can include reversing the manhole cover C that has been lifted with the support shaft 15 connected as the center of rotation, and returning to the reverse direction.
In the manhole cover opening and closing apparatus according to the present invention, the movable main body base 1 disposed outside the manhole opening provided with the manhole cover C to be opened and closed, and the manhole cover C are detachable. The lift member 10 having a connecting support shaft 15 connected to the lower end and provided with guide means 30 having a guide roller 35 at the upper and lower parts of the rear part is connected and fixed in the form of a leg on the rear part of the main body base 1. The lift operation member 40 having the guide post 45 provided with the lift mechanism 51 is provided so as to lift and lower the lift member 10 itself by meshing with the guide roller 35.
The main body base 1 is substantially U-shaped with the front open when viewed from above, and is provided with a support base 5 that positions and links the lifting operation member 40 and the lift member 10 at the back part.
The lift member 10 is connected to the base frame 11 having a substantially U-shape with the front opened as viewed from above so as to be positioned and arranged in the main body base 1, the linking support shaft 15 connected to the manhole cover C, and the lifting operation member 40. A guide means 30 for raising and lowering the lift member 10 itself is provided.
The connecting support shaft 15 is supported between the supporting arms 16 connected to the base frame 11 so as to be swingable. A connecting hole 15A corresponding to the position of the mounting hole C1 in the manhole cover C is opened, and the connecting hole 15A is opened. The mounting bolt member 15B that locks in the mounting hole C1 is inserted through the mounting bolt member 15B by a nut member 15C that is in contact with the upper surface of the connecting support shaft 15 and screwed to the mounting bolt member 15B. The connecting support shaft 15 is connected to the manhole cover C.
A jack member 20 can be attached to and detached from at least one of the end openings of the connecting support shaft 15. More specifically, the jack member 20 is connected to a lower end of a jack body 21 having a built-in hydraulic part. A fork 22 is connected and a handle 23 that swings to supply hydraulic pressure is connected to the upper portion of the jack body 21.
The base frame 11 has a first frame 12 that is substantially U-shaped with the front open when viewed from above, and the end is fixed on the left and right portions of the first frame 12 and the back side is positioned upward. The second frame 13 gradually rises as it reaches the back side as viewed from the side, and is substantially U-shaped in a plane, and the back of the first frame 12 at the lower position and the second frame 13 at the upper position. It consists of guide pillars 14 connected and arranged between the upper and lower parts.
The lift operation member 40 is connected to the lift member 10, the guide post 45 that engages with the guide means 30 in the lift member 10 and guides the lift member 10 itself, and the lift member 10 is connected to the lift member 10. And an elevating mechanism 51 for elevating and lowering.
The guide means 30 in the lift member 10 includes a lower guide body 31 that rotatably supports the front and rear guide rollers 35 disposed at the front and rear portions of the guide post 45 at a lower position with respect to the guide post 45, and the upper guide member 45. In the position, an upper guide body 32 that rotatably supports a rear guide roller 35 disposed behind the guide post 45 is provided on the upper and lower portions of the guide column 14.
The upper and lower guide bodies 31 and 32 fix the roller shaft 34 to the shaft support plate 33 fixed to the guide column 14 of the lift member 10, and abut the mountain-shaped guide plate 46 in a cross section fixed to the guide post 45. A guide roller 35 having a substantially drum shape to be guided is supported on a roller shaft 34 via a collar 36.
The elevating mechanism 51 is fixed to the upper part of the guide post 45 and takes up or winds up the tow rope 52 detachably linked to the lift member 10, and a handle for rotating the take-up drum 53. 55 at least.
Furthermore, in the method for assembling the manhole cover opening / closing device according to the present invention, in the manhole cover opening / closing device comprising the main body base 1, the lift member 10, and the lifting operation member 40, the left and right side portions of the main body base 1 are provided. The left and right side portions of the lift member 10 are aligned with each other, the lower portion of the guide means 30 is placed on the support base 5 provided at the rear portion of the main body base 1, and then the connecting column 43 in the lifting operation member 40 is attached to the main body base 1. By fitting the connecting post 7 on the support base 5 and engaging the guide post 45 with the guide roller 35, the lifting operation member 40 is placed on the main body base 1, and the tow rope 52 in the lifting mechanism 51 is lifted. By connecting to the member 10, the lift member 10 can be moved up and down by the lifting operation of the lifting operation member 40.

In the manhole cover opening / closing device and the opening / closing device and the assembling method of the opening / closing device according to the present invention configured as described above, the lifting operation is performed by combining the main body base 1 with the lift member 10 and fixing the stand base to the main body base 1. By combining the lifting operation member 40 with the lift member 10 so as to be guided up and down by the member 40, the manhole cover C connected to the lift member 10 can be lifted from the opening of the manhole by operating the lifting operation member 40, and the manhole cover C Smooth access to the inside and outside for self-cleaning and inspection work in the manhole.
A main body base 1 having a U-shape in a plane and a base frame 11 of the lift member 10 are combined, and a lifting operation member 40 is combined in a standing shape at the rear part of the main body base 1 so that a manhole such as a predetermined manhole opening is formed. The lid C can be placed outward so as to surround it, and the lifting operation, the reversing operation are performed, and the lid C is moved.
The connecting support shaft 15 of the lift member 10 is connected to the manhole cover C by locking the nut member 15C to the mounting bolt member 15B inserted into the connecting hole 15A by engaging with the mounting hole C1 of the manhole cover C. To do. At the time of connection support, the manhole cover C is lifted above the opening by the lifting action of the lifting operation member 40, and at the upper position of a predetermined height, the connection support shaft 15 supported so as to be swingable on the support arm 16 is provided at the center of rotation. The manhole cover C is inverted by rocking as an axis. This inversion operation of the manhole cover C can be performed either at the position of the manhole opening or at a position away from the manhole opening, and can be arbitrarily selected.
Further, the jack member 20 connected to the connection support shaft 15 by fitting the jack fork 22 into the end opening of the connection support shaft 15 lifts the connection support shaft 15 itself by operating the handle 23, for example, manhole cover C For example, the manhole cover C is peeled off by peeling off the surrounding sealant etc., for example, one side at a time, and the lifting operation thereof is made smooth.
The operation of the handle 55 of the elevating mechanism 51 in the elevating operation member 40 raises or lowers the lift member 10 connected to the end of the tow rope 52 by pulling out or winding the tow rope 52. When the lift member 10 is moved up and down, the upper and lower portions of the first frame 12 and the second frame 13 in the base frame 11 are fixed and integrated by the guide columns 14. When the upper and lower guide bodies 31 and 32 are guided up and down by the guide post 45, the guide bodies 45 engage with the guide post 45 at the upper and lower positions, so that stability is improved and the weight of the lifted manhole cover C and the like increases. Is not inclined.
The guide bodies 31 and 32 which are engaged with the guide post 45 and guided to move in the vertical direction are stable with the substantially drum-shaped guide roller 35 abuttingly engaged with the guide plate 46 fixed to the guide post 45. And lift guide 10 along the guide post 45 is made smooth.
The positioning combination of the lift member 10 with respect to the main body base 1, the pedestal arrangement of the lifting operation member 40 with respect to the main body base 1 by engaging the guide post 45 with the guide means 30 of the lift member 10, and the lift member of the pulling rope 52 of the lifting mechanism 51 For example, the main body base 1, the lift member 10, and the lifting / lowering operation member 40 are easily assembled on site. Moreover, these dismantling makes it easy to put together each member, make the whole compact, and make it easy to remove from the site, carry in and out on site.

  According to the above-described present invention, in the opening / closing operation of the manhole cover C, the manhole cover C is lifted while peeling off the sealing agent for fixing seal from the opening installation location, the manhole cover C is reversed, the work is reversed. A series of operations such as moving the manhole cover C can be performed. Further, the lifting operation of the manhole cover C can be easily performed manually by operating the handle 55 of the elevating mechanism 51 of the elevating operation member 40 without requiring another power source on site. In addition, the reversal of the manhole cover C makes it easy to inspect or clean the back of the manhole cover C, and the top cover can be reversed with the inner cover in place, so that the fall of dust or the like into the installation opening of the manhole cover C can be done Can be prevented. In addition, it can be separated and disassembled into the main body base 1, the lift member 10, the lifting operation member 40, etc., and it is easy to carry in to the site, assemble at the site, move away from the site, etc. , Work efficiency can be greatly improved.

  That is, this is because the present invention includes a movable main body base 1 disposed outside a manhole opening where a manhole cover C to be opened and closed is applied, and a connecting support shaft 15 detachably connected to the manhole cover C. The lift member 10 provided at the lower end and provided with the guide means 30 provided with the guide roller 35 in the upper and lower parts of the rear part is connected and fixed in a standing shape on the rear part of the main body base 1, and lifts by engaging with the guide roller 35. This is because the elevating operation member 40 having the guide post 45 provided with the elevating mechanism 51 is provided so as to elevate the member 10 itself. This simplifies lifting, reversing and moving the manhole cover C, speeding up work, improving workability and improving safety, and ease of carrying-in and removal by separating and disassembling and assembling. Etc., and there is an advantage such as improving work efficiency.

  Further, the base frame 11 of the main body base 1 and the lift member 10 combined with the main body base 1 is substantially U-shaped with the front open when viewed from above, so that it can be disposed outside the manhole cover C to be opened and closed. Eleven connecting support shafts 15 can be easily connected and fixed to the manhole cover C. Therefore, the main body base 1 can be used as a base, and the manhole cover C can be easily moved up and down via the lift member 10 by the lifting operation of the lifting operation member 40 standing on the main body base 1. C can be inverted.

  The connecting support shaft 15 of the lift member 10 can be connected to the manhole cover C by screwing the connecting support shaft 15 via a mounting bolt member 15B and a nut member 15C by locking with the mounting hole C1, and the connecting support shaft 15 itself. Is supported so as to be swingable between the support arms 16 connected to the base frame 11, and can be swung with the connecting support shaft 15 connected to the manhole cover C as the axis of rotation, and the manhole cover C is lifted. Can be reversed. Therefore, the back of the manhole cover C can be easily cleaned, and the main body base 1 can be moved as it is by moving the main body base 1 so that the manhole can be opened. Moreover, the movable main body base 1 prevents the upper cover from being scattered when the manhole cover C is closed and the attachment support shaft 15 is adjusted to the manhole cover C even when the position of the vent hole when the manhole cover C is opened is shifted. The position of the chain and the inner lid can be adjusted easily. Further, the tool can be used for opening and closing the manhole cover C with high versatility, which can support several kinds of standards such as the size of the manhole cover C.

  Further, the manhole cover C lifted by the lift member 10 can be reversed either at the position above the manhole opening or at a predetermined position after being moved by the main body base 1 to facilitate cleaning. The manhole with the manhole cover C removed and opened can be easily accessed by an operator while the manhole cover C is temporarily stored in another predetermined location by the main body base 1 and the inside of the manhole should be inspected. Can do.

  Since the jack member 20 can be attached to and detached from any one end of the connection support shaft 15, for example, the periphery of the manhole cover C is fixed with a sealant or the like by the lifting force of the jack member 20 by hydraulic drive, Even if it is clogged with dust or the like, they can be peeled off and trimmed, and lifted one side at a time. Therefore, when operating the elevating operation member 40 by human power, the elevating force of the elevating mechanism 51 that lifts the manhole cover C is sufficient, and no special power source is required, and it is possible to cope with the human power sufficiently. .

  The elevating operation member 40 is combined with the lift member 10 by the guide post 45 meshing with the guide means 30 in a state where the elevating operation member 40 is fixed to the lift member 10 via the connecting portion 41, and therefore the elevating mechanism 51 in the elevating operation member 40. As for the lifting operation, the manhole cover C can be lifted and lowered by the lift member 10 with respect to the main body base 1 and the lifting operation member 40. In addition, the combination of the main body base 1, the lift member 10, and the elevating operation member 40 is combined with the fact that each of the members 1, 10, and 40 can be configured without being bulky, and at the work site. Since it can be easily done by workers without using special tools and can be disassembled, it is easy to carry in to the site, assemble and dismantle on the site, carry out, etc. It will not get in the way.

  The guide post 45 in the elevating operation member 40 includes a lower guide body 31 that rotatably supports the front and rear guide rollers 35 disposed at the front and rear portions of the guide post 45 at a position below the guide post 45, and the guide post 45. In the upper position with respect to the guide post 45, the upper guide body 32 that rotatably supports the rear guide roller 35 disposed at the rear portion of the guide post 45 is combined with the guide means 30 provided at the upper and lower portions of the guide column 14. Therefore, the lift member 10 can be smoothly raised and lowered with respect to the lifting operation member 40 through the guide means 30 that meshes with the guide post 45 and moves up and down.

  In addition, the upper and lower guide bodies 31 and 32 fix the roller shaft 34 to the shaft support plate 33 fixed to the guide column 14 of the lift member 10, and to the mountain-shaped guide plate 46 in a cross section fixed to the guide post 45. Since the guide roller 35 having a substantially drum shape that is abutted and guided is supported on the roller shaft 34 via the collar 36, the guide roller 30 meshes closely with the guide post 45, and the guide means 30 serves as the guide post 45. Therefore, the lift member 10 is smoothly lifted and lowered.

  The elevating mechanism 51 includes a handle 55 that rotates the take-up drum 53 that pulls out or winds up the tow rope 52 that is detachably connected to the lift member 10, so that the handle 55 can be operated manually by an operator. Even in the field, work can be easily performed without requiring a special power source.

  The opening / closing device according to the present invention comprising the main body base 1, the lift member 10, and the lifting / lowering operation member 40 is a combination of positioning of the lift member 10 with respect to the main body base 1 and lifting / lowering by engaging the guide post 45 with the guide means 30 of the lift member 10. The operation member 40 can be assembled with a stance arrangement with respect to the main body base 1 and further connected to the lift member 10 of the pulling rope 52 of the lifting mechanism 51. The combination of the three members of the main body base 1, the lift member 10, and the lifting operation member 40 can be easily assembled on the site by the manual and manual operation of an operator, and does not require any special power, jig or the like. Moreover, these dismantling can be easily put together by each member, can make the whole compact, can be easily removed from the site, carried in and out at the site, and the work efficiency can be greatly improved.

  In addition, the code | symbol attached | subjected in the means for solving said subject, and each item of the effect of invention is for making easy reference with the part which shows each structure part described in drawing. The present invention is not limited to the structure and shape indicated by the reference numerals in the drawings.

  The best mode for carrying out the present invention will be described below with reference to the drawings. Reference numeral 1 shown in the figure is a main body base constituting the opening / closing device for the manhole cover C according to the present invention, which can perform a series of lifting work, reversing work, moving work and the like of the manhole cover C. The main body base 1 has a substantially U-shape with the front opened when viewed from the plane, and is formed by appropriately bending a pipe material having a predetermined diameter, and is opened at the left and right end portions and the back as shown in the illustrated example. A movable wheel (caster) 2 for movement is attached to each of the left and right parts of the unit. The width between the left and right side portions of the main body base 1 is such that the manhole is positioned outside both sides of a manhole cover C that closes the opening of a wiring buried box such as a manhole or handhole to be opened and closed. It is not smaller than the outer diameter, outer width, etc. of the cover C, and has a sufficient margin as compared with the width of the manhole cover C when positioned relative to the manhole cover C (see FIG. 1).

  Further, the main body base 1 is provided with support bases 5 for combining and assembling a lift member 10 and an elevating operation member 40, which will be described later, on the left and right sides of the rear part. As shown in FIG. 8, the support pedestal 5 includes a support plate 6 disposed on the bottom surface of the back frame, and a cylindrical connection for connecting an elevating operation member 40 (described later) fixed to the support plate 6 in a standing shape. A cylinder 7 and a connecting portion 8 for positioning a lifting operation member 40 formed on the support plate 6 and a lift member 10 described later are provided. The connecting cylinder 7 is firmly fixed by a support piece 9 in which the lower end of the connecting column 43 of the elevating operation member 40 is fitted, for example, is connected to the back frame of the main body base 1 itself and is also fixed to the upper surface of the support plate 6. And is firmly supported. The connecting portion 8 includes a columnar portion 8A into which the lower end of the guide post 45 of the lifting operation member 40 is fitted, and a stopper portion 8B that has a mountain shape in a cross section with which the guide roller 35 of the lift member 10 abuts. A free wheel 2 is disposed on the bottom surface of the support plate 6.

  A lift member 10 is combined with the main body base 1. This lift member 10 is a guide means for lifting and lowering the lift member 10 itself along the support shaft 15 connected to the manhole cover C and the lifting operation member 40 to the base frame 11 positioned and arranged in the main body base 1. 30 is provided.

  The base frame 11 is positioned in a gap portion between the left and right side portions of the main body base 1. As shown in the drawing, the first frame 12 having a substantially U-shape with the front opened as viewed from above, and the end portion is fixed on the left and right portions of the first frame 12 and the back side is positioned upward. The second frame 13 gradually rises as it reaches the back side as viewed from the side, and is substantially U-shaped in a plane, and the back of the first frame 12 at the lower position and the second frame 13 at the upper position. It consists of guide pillars 14 connected and arranged between the upper and lower parts. The first frame 12 and the second frame 13 are formed by bending a pipe material having a predetermined diameter, and the guide column 14 is, for example, a rectangular tube material connected on the left and right sides of the rear portions of the frames 12 and 13.

  At the front end of the left and right side portions of the first frame 12 in the base frame 11, a manhole cover C is attached between the support arms 16 connected to the front end so as to hang down. The shaft 15 is supported so as to be swingable. The linking support shaft 15 itself swings with the circular pipe material as a support shaft when fitted to the outer side of, for example, the circular pipe material fixed to the inner side surfaces of the left and right support arms 16. Further, a connecting hole 15 </ b> A having a long hole (slit) shape is opened in the vicinity of the left and right sides of the connecting support shaft 15 so as to correspond to the position of the mounting hole C <b> 1 in the manhole cover C. The connecting hole 15A is inserted with a mounting bolt member 15B having a locking portion at the lower end so as to be locked in the mounting hole C1, and is connected to the supporting shaft after the manhole cover C is locked to the mounting hole C1. The connecting support shaft 15 is connected to the manhole cover C via a mounting bolt member 15B by a nut member 15C screwed to the mounting bolt member 15B so as to abut the upper surface of 15 (see FIG. 7).

  A jack member 20 is detachably connected to the end opening of the connection support shaft 15. The jack member 20 has a manhole cover C that closes an opening of a manhole or the like when the manhole cover C is fixed by an inner peripheral edge of the opening and a sealant or the like to prevent entry of foreign matter or the like into the manhole or the like. In this case, the manhole cover C is released by forcibly peeling from the sealant. That is, as shown in FIG. 7, the jack member 20 has a jack fork 22 connected to the lower end of a jack body 21 with a built-in hydraulic section, and a handle 23 that swings to supply hydraulic pressure is provided on the upper portion of the jack body 21. Concatenated. Then, the jack fork 22 is inserted into, for example, a circular pipe member from the outside of at least one of the support arms 16 to be fitted into the end opening of the linked support shaft 15. Thereafter, any one of the linked support shafts 15 is lifted by a jacking operation, and the manhole cover C is forcibly peeled from the opening of a manhole or the like one side at a time by the lifted linked support shaft 15.

  Reference numeral 25 in the drawing is a stopper attached to the front and rear of the base frame 11 so as to be swingable in the horizontal direction on one of the left and right sides of the first frame 12. The stopper 25 is slidably protruded in the first frame 12 in the horizontal direction so as to prevent the manhole cover C from being shaken or shaken when the manhole cover C is lifted by the connecting support shaft 15 or after being inverted. It is intended to be locked to the manhole cover C.

  A guide means 30 is provided on the guide column 14 of the lift member 10. The guide means 30 meshes with a guide post 45 in an elevating operation member 40 which will be described later, and is guided along the guide post 45 to guide the lift member 10 itself to elevate. As shown in the figure, the guide means 30 itself is in a lower position with respect to the guide post 45, and a lower guide body 31 that rotatably supports the front and rear guide rollers 35 disposed on the front and rear portions of the guide post 45 and the guide post 45. In the upper position, an upper guide body 32 that rotatably supports a rear guide roller 35 disposed behind the guide post 45 is provided on the upper and lower portions of the guide column 14.

  As shown in FIG. 5, these upper and lower guide bodies 31, 32 protrude on the outer side of the lift member 10 to the rear side of the lift member 10 and are fixed to the guide plate 14 on the shaft support plate 33. And a guide roller 35 having a truncated cone shape that is paired on the left and right so as to have a small inner diameter is supported on the roller shaft 33 via a collar 36. Note that a guide plate 45, which will be described later, is provided with a mountain-shaped guide plate 46 in cross section before and after the guide post 45 so that the contact guide with the guide roller 35 is smooth.

  The difference between the upper and lower guide bodies 31 and 32 is whether or not there is a guide roller 35 on the rear side, and is basically not different. However, in order to maintain the weight balance when the manhole cover C is lifted as will be described later, the upper guide body 32 has only the rear guide roller 35, but it is also possible to provide the front guide roller 35. is there.

  In addition, at the rear part of the lift member 10, there is an engaging portion 38 for continuously engaging with the hook 54 of the pulling rope 52 of the lifting operation member 40 in order to lift and lower the lifting member 10 by the lifting operation of the lifting operation member 40. For example, the second frame 13 is attached to the central portion at the back.

  In order to raise and lower the lift member 10 combined with the main body base 1, there is an elevating operation member 40 combined with the main body base 1 and the lift member 10. The lift operation member 40 is connected to the lift member 10, the guide post 45 that engages with the guide means 30 in the lift member 10 and guides the lift member 10 itself, and the lift member 10 is connected to the lift member 10. And an elevating mechanism 51 such as a winch for elevating 10.

  The connecting portion 41 is formed by fixing a connecting column 43 fitted, for example, in the connecting cylinder 7 of the support base 5 in the main body base 1 to a lower frame bar 42 laid between the lower portions of the left and right leg portions of the guide post. Become. The lower frame bar 42 and the connecting column 43 shown in the drawing are formed of a pipe material having a predetermined diameter, but the present invention is not limited to this, and the fitting of the connecting column 43 into the connecting cylinder 7 is reversed inside and outside. The connecting cylinder 7 may be fitted into the connecting column 43 so that

  As shown in the drawing, the guide post 45 is formed by bending a pipe member having a predetermined diameter, for example, which is formed into a gate-shaped integrated type by connecting the left and right standing leg portions at the upper part. The left and right standing leg portions are engaged with the upper and lower guide bodies 31 and 32 of the guide means 30 in the lift member 10, and the connecting column 43 is fitted into the connecting cylinder 7, so that the lifting operation member 40 is a main body base. 1 is supported by being combined in a stand-up shape.

  In front and rear of the left and right standing portions of the guide post 45, the drum-shaped guide rollers 35 of the upper and lower guide bodies 31 and 32 do not rattle and are in a cross section so that they can be lifted and guided smoothly. A guide plate 46 having a mountain shape is fixed (see FIG. 5). The guide plate 46 is made of, for example, an angle material (an angle steel material).

  The elevating mechanism 51 is fixed to the upper part of the gate-shaped guide post 45, and a take-up drum 53 that pulls out or winds a pulling cord 52 such as a wire detachably connected to the lift member 10, and the take-up drum And a handle 55 for rotating the 53. Further, the lifting mechanism 51 can be provided with a stopper means 56. Rather, it is desirable to provide the stopper means 56 for preventing reverse rotation for safety.

  The take-up drum 53 is a hook that fixes the end of the tow rope 52 to a drum body that is rotatably supported on a drum frame fixed to the guide post 45 and detachably engages with an engagement portion 38 of the lift member 10. 54 is connected to the tip of the tow rope 52, and the drum body is rotated by a handle 55 disposed outside the drum frame. The stopper means 56 forcibly stops the rotation of the handle 55 by forcibly stopping the rotation of the handle 55 when the lift member 10 is lifted by rotating the handle 55 and the manhole cover C is lifted. Thus, for example, a one-way clutch structure capable of a release operation is provided.

  Reference numeral 57 in the figure denotes a moving operation handle, which protrudes to the rear of the lifting operation member 40 on an upper frame bar 48 that is horizontally placed between the upper portions of the left and right standing portions of the guide post 45 in the lifting operation member 40. As shown in FIG. For example, it is formed of a pipe material having a predetermined diameter, and is gripped and operated by a worker's fingers or the like for moving work of the opening / closing device of the manhole cover of the present invention after assembly.

  In addition to the stopper means 56, a safety stop means 60 is provided. The safety stop means 60 stops the lift member 10 lifted and lowered as shown in FIGS. 4 and 6 in association with the lift operation member 40 at the lift position. That is, it comprises a guide column member 61 provided on the lift member 10, a stopper column member 63 provided on the elevating operation member 40, and an engagement stop pin member 65 inserted through each column member at the same position.

  The guide column member 61 is fixed along the vertical direction between the back part of the first frame 12 and the back part of the second frame 13 in the lift member 10, and is formed in a plate shape, for example, and penetrates in the front-rear direction. An insertion portion 62 made of a pipe material is provided. The stopper column 63 is fixed along the vertical direction between the upper frame portion of the guide post 45 and the lower frame bar 42 in the elevating operation member 40. For example, the stopper column 63 has a hollow flat angle with a predetermined thickness and width. It is formed of a pipe material, and pipe material insertion holes 64 are formed at predetermined intervals in the vertical direction. Then, with respect to the insertion part 62 in the lifted lift member 10, a predetermined insertion hole 64 at the position of the insertion part 62 is selected, and the engagement stop pin member 65 is inserted into both the parts 62, 64, thereby moving up and down. The positioning of the lift member 10 raised and lowered with respect to the operation member 40 is stopped. For example, when the manhole cover C is lifted by the lift member 10, the stop position is an upper position that is sufficient to peel the manhole cover C from the opening of the handhole or other manhole, lift it slightly, and move it as necessary. Further, there is no particular limitation such as an upper position that is sufficient to be further raised and reversed.

  Next, an example of assembly and use of this will be described. The opening / closing device for the manhole cover of the present invention is carried in a state where each member 1, 10, 40 is separated and disassembled at the work site, and is assembled and used at the site. First, the main body base 1 is temporarily placed by being placed outside an opening such as a hand hole to be opened (see FIG. 9). Next, the lift member 10 is aligned and assembled with respect to the main body base 1. That is, the left and right side portions of the lift member 10 are aligned inside the left and right side portions of the main body base 1, and the lower portion of the guide means 30 of the lift member 10 is placed on the support base 5 of the main body base 1 (see FIG. 10). . Thereafter, the elevating operation member 40 is combined with the main body base 1 by fitting the connecting column 43 of the elevating operation member 40 into the connecting cylinder 7 of the main body base 1. On the other hand, by combining the guide post 45 of the lifting and lowering operation member 40 with the guide roller 35 of the upper guide body 32 in the guide means 30 of the lift member 10 so as to be engaged between the front and rear guide rollers 35 of the lower guide body 31, The elevating operation member 40 is combined with the lift member 10 in a standing shape. Then, the hook 54 of the tow rope 52 pulled out from the winding drum 53 in the lifting mechanism 51 of the lifting operation member 40 is engaged with the engaging portion 38 of the lift member 10, and the lift member 10 can be lifted by operating the lifting mechanism 51. (See FIG. 11).

  Next, the connecting support shaft 15 in the lift member 10 is positioned in the mounting hole C1 of the manhole cover C, and the mounting bolt member 15B inserted into the connecting hole 15A as shown in FIG. It is fixed with a nut member 15C. After fixing, the jack fork 22 of the jack member 20 is fitted into the end opening of one of the connection support shafts 15 and the connection support shaft 15 is lifted by the operation of the handle 23, so that the manhole cover The sealant around the C, dust that is clogged, etc. are forcibly peeled off, and this is sequentially released from one side to cut the edges. In this way, the manhole cover C is lifted by operating the handle 55 of the lifting mechanism 51 of the lifting operation member 40 to be pulled by the tow rope 52 and lifting the lift member 10. After lifting up to a predetermined position, the safety member 60 prevents the lift member 10 from descending and dropping, and the manhole cover C is reversed by a swinging operation using the connecting support shaft 15 as a swing axis (see FIG. 2), the back surface of the manhole cover C can be cleaned, and the manhole cover C is transported to a predetermined place by the free wheel 2 of the main body base 1 separately from the reversing operation. After the manhole cover C is reversed, the stopper 25 is swung in the horizontal plane to support the manhole cover C at a position below the manhole cover C to prevent the manhole cover C from being reversed to the original position in the reverse direction. deep. It should be noted that it is arbitrary whether the manhole cover C is reversed, returned, or moved further, and the manhole cover C is opened by moving the manhole cover C to a predetermined location. Check the inside of the manhole, etc.

  In addition, after cleaning the back of the manhole cover C and after completion of maintenance and inspection work in the manhole, etc., the manhole cover C is transported by the main body base 1 to the position of the opening to be closed, while being reversed by the stopper 25. Release to return to the normal position, prepare and position for closing. After the positioning, the manhole cover C is lowered to the position of the opening by the lowering operation by the elevating operation member 40 and fitted, and is released from and separated from the connection support shaft 15. The periphery of the manhole cover C is sealed and sealed with a sealant or the like, while the apparatus of the present invention is compact by removing the lifting operation member 40 and the lift member 10 sequentially from the main body base 1 and disassembling and separating them into the respective members. And transport it to another work place.

It is a schematic perspective view of the use condition in the best form for implementing this invention. It is a side view in the same way during the raising / lowering operation of the manhole cover. It is the same top view. It is the same front view. It is the principal part enlarged plan view similarly. Similarly, safety stop means is shown, (A) is a side view, (B) is a plan view. It is a side view when using a jack member similarly. It is a disassembled schematic perspective view which similarly shows an assembly. The assembly procedure is also shown, wherein (A) is a plan view of the main body base and (B) is a side view thereof. Similarly, (A) is a plan view when the lift member is combined with the main body base, and (B) is a side view thereof. Similarly, (A) is a plan view when further ascending / descending operation members are combined, and (B) is a side view thereof.

Explanation of symbols

C ... Manhole cover C1 ... Mounting hole 1 ... Main body base 2 ... Free wheel 5 ... Support base 6 ... Support plate 7 ... Connecting cylinder 8 ... Connecting part 8A ... Columnar part 8 8B ... Stopper part 9 ... Supporting piece 10 ... Lifting member 11 ... Base frame 12 ... First frame 13 ... Second frame 14 ... Guide column 15 ... Connection support shaft 15A ... Connection hole 15B ... Mounting bolt member 15C ... Nut member 16 ... Support arm 20 ... Jack member 21 ... Jack main body 22 ... Jack Fork 23 ... Handle 25 ... Stopper 30 ... Guide means 31 ... Lower guide body 32 ... Upper guide body 33 ... Shaft support plate 34 ... Roller shaft 35 ... Guide roller 36 ... Collar 38 ... Engagement part 40 ... Elevating operation member 41 ... Connection Part 42 ... Lower frame bar 43 ... Connecting post 45 ... Guide post 46 ... Guide plate 48 ... Upper part Frame bar 51 ... Elevating mechanism 52 ... Towing rope 53 ... Winding drum 54 ... Hook 55 ... Handle 56 ... Stopper means 57 ... Moving operation handle 60 ... Safety stop means 61 ... Guide pillar material 62 ... Insertion part 63 ... Stopper pillar material 64 ... insertion hole 65 ... engagement stop pin material

Claims (15)

  A first step of disposing a movable body base on the outside of the manhole opening where a manhole cover to be opened and closed is applied, and a connecting support shaft of a lift member connected to the body base so as to be movable up and down is used as the manhole cover. A second step of fixing, a third step of guiding and lifting the lift member through the guide means by an elevating mechanism provided in the main body base, and a fourth step of moving the manhole cover to a predetermined location by moving the main body base; , 5th step of preparing to reposition the manhole cover to the application position by moving the main body base, 6th step of positioning and fixing the manhole cover to the manhole opening by lowering the lift member, and releasing the supporting shaft connected from the manhole cover A manhole cover opening and closing method comprising: a seventh step.   The second step includes fitting the jack fork of the jack member into the end opening of the connecting support shaft, peeling off the sealant around the manhole cover by lifting with the jack member, and cutting the manhole cover from the manhole opening. Item 4. A method for opening and closing a manhole cover according to Item 1.   The method for opening and closing the manhole cover according to claim 1 or 2, wherein the fourth step or the fifth step includes cleaning of the manhole cover and inspection of the manhole.   The method for opening and closing a manhole cover according to any one of claims 1 to 3, wherein the fourth process or the fifth process includes reversing the lifted manhole cover with the connecting support shaft as a center of rotation, and returning to the reverse.   It has a movable main body base that is placed outside the manhole opening that is covered with a manhole cover that should be opened and closed, and a connecting support shaft that is detachably connected to the manhole cover at the lower end, and guides it to the upper and lower parts at the rear. A lift member provided with guide means including a roller, and a guide post provided with a lifting mechanism so as to be lifted and lowered by engaging with the guide roller and connected to and fixed to the rear portion of the main body base. A manhole cover opening and closing device comprising an elevating operation member.   6. The manhole cover opening and closing device according to claim 5, wherein the main body base is substantially U-shaped with the front open when viewed from above, and a support base for positioning and linking the lifting operation member and the lift member is provided at the back part.   The lift member has a substantially U-shaped base frame that is open at the front so as to be positioned and positioned within the main body base, a support shaft connected to the manhole cover, and the lift member itself along the lifting operation member. 7. A manhole cover opening and closing device according to claim 5 or 6, further comprising guide means for raising and lowering.   The connecting support shaft is supported in a freely swingable manner between the supporting arms connected to the base frame, and a connecting hole corresponding to the mounting hole position in the manhole cover is opened. The connecting support shaft is connected to the manhole cover via the mounting bolt member by a nut member inserted through the locking bolt member and abutting on the upper surface of the connecting support shaft and screwed to the mounting bolt member. The manhole cover opening and closing device according to any one of claims 5 to 7.   A jack member can be attached to and detached from at least one end opening of the connecting support shaft. The jack member connects a jack fork to a lower end of a jack body having a built-in hydraulic portion to supply hydraulic pressure. The manhole cover opening and closing device according to any one of claims 5 to 8, wherein a handle for swinging is connected to an upper portion of the jack body.   The base frame has a first frame that is substantially U-shaped with the front open when viewed from the top, and the side frame is viewed from the side so that the ends are fixed on the left and right sides of the first frame and the back side is positioned upward. The second frame, which gradually rises as it reaches the back side and is substantially U-shaped in a plane, is connected between the upper part of the lower part of the first frame and the upper part of the upper part of the second frame. The manhole cover opening and closing device according to any one of claims 5 to 9, comprising a guide column disposed.   The elevating operation member includes a connecting portion to be connected to the lift member, a guide post that meshes with the guide means in the lift member and guides the lift member itself up and down, and an elevating mechanism that is connected to the lift member and raises and lowers the lift member. The manhole cover opening and closing device according to any one of claims 5 to 10.   The guide means in the lift member is provided at the lower position with respect to the guide post at the lower position relative to the guide post and at the rear portion of the guide post at the upper position relative to the guide post. The manhole cover opening and closing device according to any one of claims 5 to 11, wherein an upper guide body rotatably supporting a rear guide roller is provided on the upper and lower portions of the guide column.   The upper and lower guide bodies have a substantially drum-shaped guide in which the roller shaft is fixed to the shaft support plate fixed to the guide column of the lift member and the cross section fixed to the guide post is in contact with the mountain-shaped guide plate. 13. The opening / closing device for a manhole cover according to claim 12, wherein the roller is supported on a roller shaft through a collar.   The elevating mechanism includes at least a take-up drum that is fixed to the upper portion of the guide post and draws out or winds a towline that is detachably connected to the lift member, and a handle that rotates the take-up drum. The opening / closing apparatus of the manhole cover in any one of Claims 5 thru | or 13.   It has a movable main body base that is placed outside the manhole opening that is covered with a manhole cover that should be opened and closed, and a connecting support shaft that is detachably connected to the manhole cover at the lower end, and guides it to the upper and lower parts at the rear. A lift member provided with guide means including a roller, and a guide post provided with a lifting mechanism so as to be lifted and lowered by engaging with the guide roller and connected to and fixed to the rear portion of the main body base. An assembling method of a manhole cover opening and closing device comprising a lifting operation member, wherein the left and right side portions of the lift member are aligned between the left and right side portions of the main body base, and the lower portion of the guide means is provided at the rear portion of the main body base Next, fit the connecting column on the lifting operation member to the connecting cylinder on the support base of the main body base and place the guide post on the supporting base. By engaging with the id roller, the lifting operation member is placed on the main body base, and the lifting member in the lifting mechanism is linked to the lifting member so that the lifting member can be raised and lowered by the lifting operation of the lifting operation member. A method for assembling a manhole cover opening and closing device.

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