JP2006299520A - Common ditch lid opening and closing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a common ditch lid opening and closing device capable of being carried by human power, facilitating its assembly at site, stabilizing its moving after assembly easily, and lifting and suspending a common ditch lid even by one person. <P>SOLUTION: A configuration of the common ditch lid opening and closing device is composed of a pair of upright frames composed of a horizontal member having wheels at both ends and capable of running in the longitudinal direction and a vertical member erected from a central part of the horizontal member, a horizontal frame composed of two horizontal members having a predetermined clearance and constructed horizontally in the direction crossing the longitudinal direction of the horizontal member orthogonally in an upper end part of the pair of upright frames, a jack having a piston rod erected in a central part of the horizontal frame and moving vertically in the clearance, and two suspension ropes which are inserted into the clearance, whose one ends are connected with an upper part of the piston rod, and whose other ends are connected with the hook hooked in a common ditch lid mounting part of the common ditch lid detachably. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a joint groove lid opening / closing device that vertically attaches / detaches a joint groove lid of a joint groove that collectively stores various cables such as distribution lines and communication lines.

  In recent years, in urban areas, the undergrounding of electric wires has been promoted in consideration of the urban landscape, and various cables such as distribution lines and communication lines are intensively accommodated in joint grooves that are lid-type U-shaped grooves. The cab system (Cable Box Network System) is becoming popular. The upper part of the common groove is open to the ground, and a heavy common groove cover (cab cover) is bridged so that a third party cannot easily enter and exit. Therefore, every time an operator enters and exits the common groove, it is necessary to open and close the heavy common groove lid.

  Since it is difficult to manually open and close the joint groove cover, a small crane vehicle may be used. In this case, it is not only necessary to secure a space for parking the small crane truck, but also earth and sand are sandwiched around the joint groove cover, and the adjacent joint groove cover is lifted simultaneously, or the small crane truck is lifted. Accidents occur where small cranes fall over due to lack of capacity. Therefore, a dedicated joint groove lid opening / closing device is used for opening and closing the joint groove lid.

  For example, as a dedicated joint groove lid opening / closing device, there is a rental product (product name: CAB opener) manufactured by Doi Manufacturing Co., Ltd. This CAB opener has a pair of support frames composed of a horizontal member having wheels at both ends and capable of traveling in the longitudinal direction, a vertical member standing upright from a central portion of the horizontal member, and a pair of support frame frames at the upper ends of the pair of support frames. And a wire block composed of a fixed pulley and a moving pulley suspended near both ends of the horizontal frame. A wire rope is wound around the fixed pulley and the moving pulley. By hooking the hook fixed to the joint groove lid hooking portion and winding or feeding the wire rope, the joint groove lid is lifted or hung in the vertical direction.

Further, a manhole cover opening / closing device disclosed in Japanese Patent Application Laid-Open No. 10-280455 is “opening / closing a manhole cover which can be easily and efficiently opened and closed safely even with a light operating force even with a heavy manhole cover. As a means for solving the problem, a main body frame that can be extended and contracted and that can run through a caster is provided, and a pair of jacks are provided on the main body frame. An interlocking member for interlocking with the jack is provided, a chain is provided for each jack, the chain is hung on the manhole cover, the one jack is operated, and the other jack is operated via the interlocking member together with the jack, The manhole cover is moved up and down horizontally through the chain by the operation of both jacks.
Japanese Patent Laid-Open No. 10-280455

  However, although the CAB opener can be assembled on site, the number of components is as large as 15 and it takes time to assemble. In addition, since the wire block is suspended from the horizontal frame, the height from the ground surface to the top of the horizontal frame is also high, 1100 to 1000 mm, so when moving with empty load, There is also a possibility that the moving direction becomes unstable. And the total weight after assembly is as heavy as 164kg, as long as it moves along the side edge of the common groove, but for example to change the traveling direction of the CAB opener to obstruct pedestrian traffic If it is necessary to move to a position where it does not get in the way, it cannot be moved easily. Furthermore, since lifting is performed by manual handle operation, labor is required for lifting.

  In the technique disclosed in Japanese Patent Application Laid-Open No. 10-280455, although the main body frame can be reduced, an assembly method at the site is not adopted. It cannot be loaded into a passenger car, and loading and unloading by manpower is heavy labor. In addition, since two lifting devices are provided, an interlocking member that is a device for synchronizing the two lifting devices is required. Furthermore, as in the case of the CAB opener described above, it is not easy to change the temporary storage location when the joint groove lid opening / closing device obstructs traffic, etc., and lifting is performed by manual handle operation. Cost.

  Therefore, the present invention is a joint groove that can be carried by human power, is easy to assemble on site, is stable and easy to move after assembly, and can lift and suspend the joint groove lid with one person's light labor. An object is to provide a lid opening / closing device.

In order to solve the above-described problem, a joint groove lid opening / closing device according to claim 1 of the present application includes a pair of strut frames formed integrally with wheels at both ends, and orthogonal to the upper ends of the pair of strut frames. It is horizontally mounted, has a predetermined gap at the center, and includes a manual hydraulic pump at one end of the gap and a horizontal frame in which a hydraulic jack is integrally formed at the center.
Further, the joint groove lid opening / closing device according to claim 2 of the present application is the joint groove lid opening / closing device according to claim 1, wherein the jack upper portion is inserted through a predetermined gap of the horizontal frame, One end thereof is connected to the upper portion of the jack, and the other end has two suspension ropes connected to a hook that is detachably hooked to a joint groove lid hooking portion of the joint groove lid.
The joint groove lid opening / closing device according to claim 3 of the present application is the joint groove lid opening / closing device according to claim 1 or 2, wherein the hook corresponds to a separation distance of the joint groove lid hooking portion. It is detachably attached to an end of a long suspension rod and is connected to the suspension rope via the suspension rod.
Furthermore, the joint groove lid opening / closing device according to claim 4 of the present application is the joint groove lid opening / closing device according to any one of claims 1 to 3, wherein the pair of support frame, the horizontal frame, and the The horizontal frame and the suspension cable are detachable from each other.
Further, a joint groove lid opening / closing device according to claim 5 of the present application is the joint groove lid opening / closing device according to any one of claims 1 to 4, wherein the horizontal member of any one of the pair of support frames. Comprises a detachable caster, and the grounding position of the attached caster is located below the grounding position of the wheel.
A joint groove lid opening / closing device according to claim 6 of the present application is the joint groove lid opening / closing device according to any one of claims 1 to 5, wherein an upper end portion of the support frame and both ends of the horizontal frame are provided. A gripping handle is fixed to the portion, and the upper portion of the support frame and the both ends of the horizontal frame are detachably fitted and abutted, and bolt through holes are penetratingly formed on each abutting surface. It is characterized by that.
Further, a joint groove lid opening / closing device according to claim 7 of the present application is the joint groove lid opening / closing device according to any one of claims 1 to 6, wherein two or more joint groove lid opening / closing devices are It is comprised so that it can mutually connect by the connecting rod inserted in a volt | bolt through-hole.

The joint groove lid opening and closing device according to claim 1 of the present invention is a horizontally extending frame that is perpendicular to the upper end of the pair of column frames and has a pair of column frames integrally formed with wheels at both ends. It has a predetermined gap, and is composed of a manual hydraulic pump at one end of the gap and a horizontal frame in which a hydraulic jack is integrally formed at the center.
In the invention according to claim 1 of the present application, since there is one jack, unlike the joint groove lid opening / closing device provided with a plurality of lifting devices, a device for synchronizing the plurality of lifting devices is unnecessary, and the jack is manually hydraulically operated. Since the hydraulic jack is operated by a pump, the joint groove lid can be attached and detached with extremely light labor, and no electric power other than human power is required for the operation of the hydraulic jack.

  In the joint groove lid opening and closing device according to claim 2 of the present application, the upper part of the jack is inserted into a predetermined gap of the horizontal frame, one end of which is connected to the upper part of the jack, and the other end is a joint groove joint. Since it is configured by two suspension ropes connected to hooks that are detachably hooked to the groove lid hanging portion, the suspension rope is within a predetermined gap formed between the horizontal members. Therefore, when a load is applied to the jack, the horizontal frame does not receive an unbalanced load. Therefore, even if the common groove lid is lifted, the common groove lid opening / closing device does not fall down. And since one end of the suspension rope is connected to the upper part of the jack, and the upper part of this jack is located above the horizontal frame, the height from the ground surface to the top end of the horizontal frame can be kept low. Even if the joint groove lid opening / closing device is moved by an empty load, the joint groove lid opening / closing device is not at all feared to fall, and the length of the vertical material constituting the column frame is short, that is, The height of the support frame can be kept low. In the examples described later, the height from the ground surface to the top of the horizontal frame is 650 mm, which is approximately ½ of the CAB opener described above.

  In the joint groove lid opening and closing device according to claim 3 of the present application, the hook is connected to the suspension rope via a suspension rod having a length corresponding to the separation distance of the joint groove lid hooking portion. For this reason, since the joint groove cover hooking part is always lifted by a tensile force in the vertical direction, the joint groove cover is lifted without generating an excessive force, unlike the case of lifting obliquely upward.

  In the joint groove lid opening and closing device according to claim 4 of the present application, it can be disassembled into four members, a pair of support frames, a horizontal frame, and a member composed of a suspension rope and a suspension rod. You can do it. In addition, the joint groove lid opening / closing device according to the present invention may be made of steel or aluminum alloy, but the other members except for the member composed of two suspension ropes and hanging rods are made of aluminum alloy. In the case of the example, the weight is approximately 70 kg. Therefore, each disassembled member can be carried by one person, and a plurality of sets of joint groove lid opening / closing devices can be loaded on a passenger car such as a light van.

  In the joint groove lid opening / closing device according to claim 5 of the present invention, a detachable caster is provided on one of the horizontal members of the pair of support frames, and when the caster is attached, the grounding position of the caster is the position of the wheel. Located below the grounding position. For this reason, if this caster is attached to one column frame of the assembled common groove lid opening / closing device and the other column frame is lifted, this common groove lid opening / closing device is like a unicycle. This makes it easy for one person to change the temporary storage location.

In the joint groove lid opening and closing device according to claim 6 of the present application, gripping handles are fixed to the upper end portion of the support frame and both ends of the horizontal frame, and the upper portion of the support frame and the both ends of the horizontal frame are connected to each other. A bolt through-hole is formed through each of the surfaces that are detachably fitted and abutted and contacted. For this reason, not only can the support frame and horizontal frame before assembly be securely gripped with one hand, but also when the support frame and horizontal frame are assembled, the grip handles for both frames are in close proximity, It can be easily assembled by one person and can be easily assembled by screwing each bolt into the bolt through hole.
Further, in the case of the joint groove lid opening / closing device according to claim 5 of the present application, the joint groove lid opening / closing device is easily moved in the vertical and horizontal directions by gripping the grip handle of the support frame not attached with the casters. be able to.

  In the joint groove lid opening / closing device according to claim 7 of the present invention, the joint groove lid opening / closing device is configured to be connected to each other by the connecting rod inserted through the bolt through hole. It is possible to lift and suspend large joint groove lids with joint groove cover hanging parts at four corners, and two or more joint groove lids with joint groove cover hanging parts at two points simultaneously. Can be lifted and hung.

  An embodiment according to the best mode for carrying out the present invention will be described with reference to FIGS. 1 is a front view of a joint groove lid opening / closing device according to the embodiment, FIG. 2 is a side view of the joint groove lid opening / closing device according to the embodiment, and FIG. 3 is a diagram of the joint groove lid opening / closing device with casters attached thereto. 3 (a) is a front view thereof, and FIG. 3 (b) is a side view thereof.

  First, the configuration of the joint groove lid opening / closing device according to the embodiment will be described. 1 to 3, reference numeral 1 is a joint groove lid opening / closing device according to the embodiment, reference numeral 10 is a support frame, reference numeral 12 is a horizontal member, reference numeral 14 is a vertical member, reference numeral 16 is a wheel, reference numeral 18 is a stopper, reference numeral 20. Is a caster, reference numeral 22 is a caster sheath pipe, reference numeral 24 is a connection sheath pipe, reference numeral 26 is a connection rod, reference numeral 28 is a handle for gripping a support frame, reference numeral 30 is a horizontal frame, reference numeral 32 is a horizontal member, reference numeral 34 Is a hydraulic jack body, numeral 36 is a manual hydraulic pump, numeral 40 is a manual hydraulic pump, numeral 40 is a piston rod, numeral 42 is a handle, numeral 44 is a handle for holding a horizontal frame, numeral 46 is a hanging rope hooking piece, numeral 50 Is a suspension rope main body, 52 is a suspension rope body, 54 is a suspension rod, 56 is a hook, 58 is a suspension piece, 60 is a locking piece, 70 is a common groove, and 72 is a common groove lid.

  The joint groove lid opening / closing device 1 is composed of a pair of support frame 10, a horizontal frame 30, and a suspension line 50. The support frame 10 and the horizontal frame 30, and the horizontal frame 30 and the suspension line 50 are attached to and detached from each other. It is free. Below, each structure of the support | pillar frame 10, the horizontal frame 30, and the suspension rope 50 is demonstrated.

  The support frame 10 is composed of a horizontal member 12 horizontally provided along a side edge of the common groove 70, and a vertical member 14 erected from a central portion in the length direction of the horizontal member 12, It is composed of two wheels 16, 16 that are supported in the vicinity of both ends of the horizontal member 12 and on the lower surface of the horizontal member 12. The shaft support member that supports the wheels 16 and 16 is fixed to the horizontal member 12 and regulates the rotation direction of the wheels 16 and 16, and the column frame 10 is arranged in the length direction of the horizontal member 12, that is, the joint groove 70. It can run only in the side edge direction. Moreover, the wheels 16 and 16 are provided with stoppers 18 so as to prevent the self-propelled propeller frame 10 from running on its own.

The vertical member 14 has a U-shaped groove shape in which a portion where the support frames 10 and 10 face each other in a plan view is opened, and a portion corresponding to the flange is widened upward. In addition, below the portion where the end portion of the horizontal frame 30 to be described later is fitted, the above-described groove-shaped open portion is closed with a flat plate, and the end portion of the horizontal frame 30 is at the upper edge of the flat plate. They are placed in contact with each other. Further, a connecting sheath tube 24 is embedded in the middle portion of the vertical member 14 in parallel with the length direction of the horizontal member 12, and both end portions of the connecting sheath tube 24 are open to the outside. Further, a column frame gripping handle 28 obtained by bending a round bar into a gate shape is fixed to the web surface of the upper end portion of the column frame 10 with its horizontal portion facing up.
In this embodiment, the length of the horizontal member 12 is 660 mm, and the length from the ground contact surface of the wheel 16 to the top end of the vertical member 14, that is, the height of the support frame 10 is 650 mm.

The horizontal frame 30 is composed of two horizontal members 32 and 32 provided side by side with a predetermined gap and a hydraulic jack 34 mounted on the horizontal members 32 and 32. ing. In this embodiment, square tubes are used for the horizontal members 32, 32. A fitting member (not shown) that is fitted and screwed to the vertical members 14 and 14 is fixed to both ends of the horizontal members 32 and 32. The fitting members attach the horizontal members 32 and 32 to each other. It also plays a role of integrating the two rectangular tubes that are formed while maintaining a predetermined interval.
Further, horizontal frame gripping handles 44, 44 each having a round bar bent into a gate shape are fixed to both ends of the horizontal members 32, 32 with their horizontal portions facing upward. Note that a horizontal frame grip handle 44 fixed to an end portion on which a manual hydraulic pump 38, which will be described later, is mounted, is fixed with its horizontal portion obliquely upward and toward the end portion.

  The hydraulic jack 34 mounted on the horizontal members 32, 32 includes a hydraulic jack body 36, a manual hydraulic pump 38, and a hydraulic hose (not shown) that connects the hydraulic jack body 36 and the manual hydraulic pump 38. It is configured. The hydraulic jack body 36 is erected at the center in the length direction of the horizontal members 32, 32, and the piston rod 40 inserted into the hydraulic jack body 36 is formed between the horizontal members 32, 32. It moves up and down through the gap. When oil is sent from the manual hydraulic pump 38 to the hydraulic jack main body 36, the piston rod 40 is raised, and the oil returns to the manual hydraulic pump 38, so that the piston rod 40 is lowered. Note that four L-shaped hanging rope hooking pieces 46 are fixed to the upper portion of the piston rod 40 radially at the vertical portion outward and upward. A hanging rope hooking portion is formed by the piece 46. In addition, suspension ropes 50 and 50 that are hooked to a suspension rope hooking portion that will be described later are also inserted through the gap formed between the horizontal members 32 and 32, as with the piston rod 40. .

  The both ends of the horizontal frame 30 are fitted into the U-shaped portions of the upper portions of the pair of support frames 10, 10, and the small edges and the U-shape of the both ends of the horizontal frame 30 are fitted. The web-shaped surface comes into contact. Bolt through-holes are formed through the respective abutting surfaces, and the pair of column frames 10 and 10 and the horizontal frame 30 are detachably screwed to each other. The main part is formed.

  A caster-attaching sheath tube 22 is fixed to the center of the horizontal member 12 of one of the main column frames 10 of the main portion of the joint groove lid opening / closing device 1 with its opening facing downward. The shaft support member of the caster 20 is an insertion tube that can be inserted into the caster mounting sheath tube 22, and the caster 20 is attached to the support frame 10 by inserting the insertion tube into the caster mounting sheath tube 22 from below. Worn. The installation surface of the attached caster 20 is positioned below the traveling wheel 16. In the embodiment, the caster mounting sheath tube 22 is fixed to the column frame 10 on the side where the manual hydraulic pump 38 is placed. This is because when the caster 20 is attached to the support frame 10 and the joint groove lid opening / closing device 1 is moved, the support hydraulic frame 38 is mounted on the support frame 10 on the side where the manual hydraulic pump 38 is mounted. This is because consideration has been given so that it can be moved more easily by gripping another column frame 10 that is heavier and more lightly placed.

  As described above, the connecting sheath tube 24 having both ends thereof opened to the outside is embedded in the column frames 10 and 10 of the joint groove lid opening / closing device 1. The main parts of the two joint groove lid opening / closing devices 1 are arranged in parallel, and both ends of a round bar-shaped connecting rod 26 whose length is adjustable are inserted into the opposing connecting sheath tubes 24, 24, and the connecting sheath tube 24 is inserted. By tightening the tightening bolts attached thereto, the main parts of the two joint groove lid opening / closing devices 1 are integrated via the two connecting rods 26 and 26. Furthermore, it is needless to say that another joint groove lid opening / closing device 1 can be added to the connected joint groove lid opening / closing device 1, 1.

  The suspension rope 50 is composed of a suspension rope main body 52 in which both ends of the wire rope are ring-shaped, a round bar-like suspension rod 54, and a hook-shaped hook 56. At both ends of the suspension rod 54, substantially triangular suspension pieces 58, 58 each having an insertion hole penetrating in the center are fixed, and the suspension pieces 58, 58 and two suspension rope main bodies 52, 52 are provided, It is connected via a shackle. A plurality of locking pieces 60, 60,... Are further fixed to the same side as the hanging piece 58 on the outside of the hanging piece 58 of the hanging rod 54, and a hook 56 is engaged between the locking pieces 60, 60. A locking portion to be stopped is formed. In FIG. 1, five locking pieces 60, 60,... Are fixed to both ends of the suspension rod 54, and four locking portions are formed. The hook 56 is locked to this locking portion via a shackle. The engaging portion is in a symmetric position with respect to the center of the suspension rod 54, and the symmetrical separation distance of the engaging portion corresponds to the position of the joint groove lid attaching portion of the joint groove lid 72. ing.

  In the present embodiment, the horizontal member 12 and the vertical member 14 of the support frame 10, the caster mounting sheath tube 22 and the connecting sheath tube 24, the lateral member 32 of the horizontal frame 30 and the hydraulic jack body 36 are supported. The support member is made of an aluminum alloy to reduce the weight.

  Next, the operation and usage of the common groove lid opening / closing device 1 will be described. First, the opening / closing operation | work of the common groove cover 72 which has a common groove cover hooking part in two places is demonstrated.

The opening / closing operation of the common groove lid 72 is usually performed according to the following procedure. That is,
(1) The joint groove lid opening / closing device 1 is disassembled into the support frame 10, 10, the horizontal frame 30, and the suspension cable 50 so as to be easily transported, and is carried into the site. By temporarily placing the pair of column frames 10 and 10 carried into the site on opposite side edges of the common groove 70, the horizontal frame 30 is placed over the column frames 10 and 10 and fixed to each other, thereby The main part of the lid opening / closing device 1 is assembled. At the time of assembly, the support frame grip handle 28 and the horizontal frame grip handle 44 are positioned close to each other. Therefore, the main part of the joint groove lid opening / closing device 1 can be assembled very easily by one person.

  (2) The joint groove lid opening / closing device 1 is aligned with the line connecting the joint groove lid hooking portions of the joint groove lid 72 to be lifted, and the stopper 18 is operated. By operating the stopper 18, the joint groove lid opening / closing device 1 is fixed at that position without self-propelling.

  (3) Usually, a female screw is embedded in the joint groove lid attaching portion of the common groove lid 72, and a ring bolt having a ring-shaped head is screwed into the female screw, and the hook 56 is inserted into this ring. Hang on. Alternatively, in the case where the common groove lid hooking portion of the common groove lid 72 is a horizontal hooking rod embedded, the hook 56 is hooked on the hooking rod. Then, the hooks 56 are locked via the shackles to the locking portions where the hooks 56 at both ends of the hanging rod 54 are locked. As described above, since a plurality of locking portions (four locations in FIG. 1) are prepared at both ends of the suspension rod 54, the engagement corresponding to the position of the joint groove lid hooking portion of the joint groove lid 72 is provided. The hook 56 is locked to the stop portion.

  (4) One end of the suspension rope main body 52 having both ends in a ring shape is hooked to the suspension rope hooking piece 48 and the other end is connected to the hanging piece 58 via a shackle. At this time, the piston rod 40 is lowered to the lowest position. When the handle 42 of the manual hydraulic pump 38 is reciprocated up and down, oil is fed into the hydraulic jack main body 36 and the piston rod 40 is raised. As the piston rod 40 rises, the suspension lines 50 and 50 are pulled upward, and the joint groove lid 72 is lifted. Then, when the lower portion of the common groove lid 72 becomes higher than the top end of the common groove lid 72 that has not yet been lifted, the oil feeding to the hydraulic jack main body 36 is stopped.

  (5) The operation of the stopper 18 is released, and the joint groove lid opening / closing device 1 in a state where the joint groove lid 72 is lifted is caused to travel along the side edge of the joint groove 70 to a predetermined position. By returning the oil, the piston rod 40 is lowered, and the suspended common groove lid 72 is temporarily placed at a predetermined position.

  (6) The joint groove 70 is opened by this series of operations, and becomes a work entrance. After the work such as maintenance in the common groove 70 is completed, the common groove cover 72 is returned to the original position by performing the reverse procedure of the steps (2) to (5) described above, and the opening is opened. The joint groove 70 is closed. Thereafter, the common groove lid opening / closing device 1 is disassembled into the support frame 10, the horizontal frame 30, and the suspension cable 50 as needed, and is carried out from the site.

  During maintenance work or the like in the common groove 70, the common groove lid opening / closing device 1 is temporarily placed in an appropriate place. There is a case where the place is changed. In such a case, a shaft support member of the caster 20 is inserted into the caster mounting sheath tube 24 fixed to the horizontal member 12 of the column frame 10 of the common groove lid opening / closing device 1, and the caster 20 is inserted into the column frame 10. Attach to. As described above, since the installation surface of the attached caster 20 is positioned below the traveling wheel 16, it is possible to jointly lift the column frame 10 side where the caster 20 is not attached. Only the caster 20 is grounded, and the groove lid opening / closing device 1 is like a unicycle and can be moved freely by one person's labor.

In the case of the opening and closing operation of the joint groove lid 72 having the joint groove lid hanging portions at the four corners, or the joint groove lid 72 having the joint groove lid hooking portions at the two locations at the same time, the connecting rod Both ends of 26 are inserted into the connecting sheath tubes 24, 24, and the fastening bolts attached to the connecting sheath tube 24 are tightened to integrate the two joint groove lid opening / closing devices 1 together. At this time, the mutual distance between the two common groove lid opening / closing devices 1 needs to be equal to the distance between the four common groove lid hooking portions or the two common groove lid hooking portions. There is.
Since the subsequent opening / closing operation procedure of the common groove lid 72 conforms to the opening / closing operation procedure of the common groove lid 72 in the case where the joint groove lid attaching portion is provided at the two positions described above, the description thereof is omitted. As described above, it is of course possible to connect another joint groove lid opening / closing device 1 to the above joint groove lid opening / closing devices 1, 1.

FIG. 1 is a front view of the joint groove lid opening / closing device according to the embodiment. FIG. 2 is a side view of the joint groove lid opening / closing device according to the embodiment. FIGS. 3A and 3B are views of the joint groove lid opening / closing device with casters attached, in which FIG. 3A is a front view and FIG. 3B is a side view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Joint groove cover opening / closing device 10 Post frame 20 Caster 30 Horizontal frame 34 Hydraulic jack 50 Suspension rope 72 Joint groove cover

Claims (7)

A pair of strut frames formed integrally with wheels at both ends;
A horizontal frame that is horizontally mounted perpendicularly to the upper ends of the pair of support frames, has a predetermined gap at the center, and is formed integrally with a manual hydraulic pump at one end of the gap and a hydraulic jack at the center. When,
A joint groove lid opening and closing device characterized by comprising:   The upper portion of the jack is inserted into a predetermined gap of the horizontal frame, one end of which is connected to the upper portion of the jack, and the other end is detachably hooked to the joint groove lid attaching portion of the joint groove lid. The joint groove lid opening and closing device according to claim 1, further comprising two suspension ropes connected to the hook.   The hook is detachably attached to an end portion of a suspension rod having a length corresponding to a separation distance of the joint groove cover attaching portion, and is connected to the suspension rope via the suspension rod. The joint groove lid opening / closing device according to claim 1 or 2.   The joint groove cover opening and closing according to any one of claims 1 to 3, wherein the pair of support frames and the horizontal frame, and the horizontal frame and the suspension cable are detachable from each other. apparatus.   2. The horizontal member of any one of the pair of column frames includes a detachable caster, and a grounding position of the attached caster is located below a grounding position of the wheel. The joint groove lid opening and closing device according to any one of claims 4 to 4.   A grip handle is fixed to the upper end portion of the support frame and both ends of the horizontal frame, and the upper portion of the support frame and the both ends of the horizontal frame are detachably fitted and contacted, and contact each other. 6. The joint groove lid opening / closing device according to any one of claims 1 to 5, wherein a bolt through hole is formed through the surface of the joint groove lid.   The two or more joint groove lid opening / closing devices are configured to be connected to each other by a connecting rod inserted into the bolt through hole. Joint groove lid opening and closing device.

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