JPH11171481A - Wedge type jack device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost of production on this wedge type jack device, and to curtail expenditure for the repairing and replacing work of a bearing by removing the useless hydraulic cylinder jack from a device body after a structure is jacked up, and assembling it in the device body of another wedge type jack device in use at the other job sites for common use at plural construction fields. SOLUTION: At least a wedge type driving member 4 formed with an incline 19 on the top face and a single or two wedge type pressure receiving members 5, forming an incline 20 at the same inclination slidingly contacting with the incline of this wedge type driving member 4 at one side of both upper and lower surfaces and formed with a horizontal surface at the other side both are made contact with their respective inclines 19 and 20, making them stackingly storable in a housing, and the wedge type driving member 4 is made movable in the longitudinal direction, while the wedge type pressure receiving member 5 is regulated of its movement in the horizontal direction and an upper part of the wedge type pressure receiving member 5 in a position higher than the wedge type driving member 4 is projected from an upper opening and set up therein, and in this state, a cylinder 8 of a hydraulic cylinder jack 2 is detachably attached to a mounting sidewall 12 of the housing after making a piston rod 9 be pierced through, and further a tip of this piston rod is detachably connected to a wall thickness end 25 of the wedge type driving member, and thus this wedge type jack device is constituted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wedge-shaped jack device which lifts and supports a heavy structure such as a bridge, for example, for mounting or replacing a bearing device interposed between a substructure and a substructure. More specifically, in the case where there are a plurality of work sites, an economical wedge-shaped jack device capable of maintaining the state after lifting a structure at one site and removing the driving means to be used at another site. About.

[0002]

2. Description of the Related Art A heavy structure (hereinafter, referred to as a structure) such as a bridge girder supported by a bearing device such as a bridge or a highway, and a substructure supporting the structure are provided with the structure. Vertical loads such as dead loads and live loads can be reliably transmitted to substructures,
Further, with respect to horizontal movement due to expansion and contraction of the structure due to cold and warm, vibration and the like, a bearing capable of horizontally moving in anticipation of the horizontal movement length is installed in an appropriate place. These already installed bearings (hereinafter referred to as “existing bearings”) have been in use for many years since the construction of the structure, so they are damaged by distortion or bending stress due to the load or vibration from the structure, and are also subject to rainwater, sand and dust. In many cases, the load absorption function is deteriorated due to corrosion or the like due to corrosion or the like, and the load absorbing function is reduced or stopped. If the deteriorated existing bearing is left unattended, each load acting on the structure cannot be absorbed by the existing bearing, and the structure itself often cracks or breaks, possibly causing the structure to break and become large. Due to the danger of disaster, there is a growing need to replace existing deteriorated bearings with new ones.

Conventionally, as a method of replacing these existing bearings, a metal plate or a steel sandal having a height substantially equal to the height of the existing bearing is stacked near the existing bearing to form a temporary receiving member. A hydraulic jack that can lift while supporting the structure (hereinafter referred to as lifting) is installed near the bearing,
Lifting (several meters) until existing support and structure are slightly separated
m to 1 cm), and the structure is temporarily received with a temporary receiving tool having a metal plate material and the like, and the existing bearing is removed in that state, a new bearing is installed, and then the hydraulic jack is used to reconstruct the structure. The work of lifting the object once more than the temporary receiving position to remove the temporary receiving device, and then lift the object to replace the bearing. In addition to the above-described method of replacing the bearing, there have been known methods such as a bracket method and a special gantry method depending on various conditions in which the bearing is mounted.

[0004] In these construction methods, heavy structures such as bridges cannot be lifted smoothly, and work for installing temporary receiving members and the like for lifting the bridges is required. Not only that, the burden on the worker was heavy and dangerous, which also caused an accident. Therefore, the present inventor first invented a lifting method for a bridge or the like and a wedge-shaped jack device used for lifting the structure safely and easily.
No. (Patent No. 1769812), Japanese Patent Publication No. Hei 8-11679
No. (Japanese Patent No. 2099537), Patent No. 257002
No. 4,944,492, and is currently being implemented at a number of construction sites with great success.

In the wedge-shaped jack device described in these publications, a wedge-shaped driving member having inclined surfaces on upper and lower surfaces is interposed between two upper and lower wedge-shaped pressure receiving members also having inclined surfaces. By pushing the wedge-shaped drive member in the length direction with the hydraulic cylinder jack, the wedge-shaped drive member moves upward with the slide of the lower wedge-shaped pressure receiving member and slides with the slope of the wedge-shaped drive member. Accordingly, the upper wedge-shaped pressure receiving member moves upward to lift the structure. Then, in order to maintain this state, a horseshoe-shaped plate-like shape is placed over the piston rod of the hydraulic cylinder jack in a space between the reaction force receiving plate, which is a fixed portion of the hydraulic cylinder jack, and the wedge-shaped drive member. A stopper mechanism is employed in which a considerable number of stopper members are fitted, the space between the reaction force receiving plate and the wedge-shaped driving member is filled, and the movement of the wedge-shaped driving member is restricted. With this wedge-shaped jack device, it is possible to repair or replace an existing bearing while passing the vehicle. In such a case, various fluctuating loads are applied to the structure due to the passage of vehicles, etc., causing displacement and vibration.These are caused by sliding plates and buffer plates interposed between the upper wedge-shaped pressure receiving member and the lower surface of the structure. It is possible to repair and replace existing bearings that were dangerous or impossible in the past, safely and easily in a short period of time, which has been praised by civil engineering and construction-related parties. I have.

In addition, when the Road Traffic Structure Ordinance was revised, T
Today, as bearing improvements are being implemented nationwide from L20t to TL25t, and today, conversion to seismic isolation bearings is being carried out on a large scale due to the review of seismic design after the earthquake. Large and safe jacks have been required. On the other hand, the only reason that the screw lock type jack is wide is that it is inexpensive,
Conversely, the reason why the wedge-shaped jack device according to the present invention is not widely used is that it is expensive, and the superiority of the wedge-shaped jack device has already been established in terms of performance.

[0007]

SUMMARY OF THE INVENTION It seems as if the previously-invented lifting method and apparatus could solve all the repair and replacement work of the existing bearing. However, the above method and apparatus have been successful because they can lift bridges and other structures safely and smoothly. However, the conventional wedge-shaped jack device has one set of hydraulic cylinder jacks per device body. Since it is incorporated, the hydraulic cylinder jack, which is no longer required after the stopper member is mounted, must be kept attached, which is extremely uneconomical. In other words, the cylinder of the hydraulic cylinder jack is attached to the casing of the device body with a screw, but the connection between the tip of the piston rod and the thick end of the wedge-shaped drive member is performed after the cylinder is attached to the casing. Since the structure is such that the wedge-shaped drive member is dropped into the housing from above and slidably engages up and down, the hydraulic cylinder jack cannot be removed from the apparatus body when the structure is lifted. Therefore, in the conventional wedge-shaped jack device, the cost of the entire device could not be reduced because the hydraulic cylinder jack and the hydraulic pump, pressure-resistant hose, and the like for driving the jack were expensive.

Further, in a concrete structure such as a hollow slab bridge, a space between a substructure (abutment) and a bridge girder is narrower than that of a steel bridge, and it is difficult to perform a lifting operation in this narrow space. In the conventional wedge-shaped jack device, in the conventional type in which a horseshoe-shaped stopper member is inserted from above, the wedge-shaped jack device is mounted low by suspending a substructure.
Alternatively, a bridge girder was sometimes attached so that the stopper member could be inserted from above.

Therefore, the inventor of the present invention has made further studies and, after lifting the structure, removes the hydraulic cylinder jack which is no longer required from the apparatus main body, and uses the wedge-shaped jack apparatus used at another work site. The present invention has been completed by paying attention to the fact that if it is incorporated in a plurality of work sites and shared by a plurality of work sites, it greatly contributes to a reduction in the cost of the wedge-shaped jack device, and the cost for repairing and replacing the bearing can be reduced. That is, the present invention makes it possible to easily remove and attach the hydraulic cylinder jack from the device body even after lifting the structure, and also in concrete structures such as hollow slab bridges. An object of the present invention is to solve the above-mentioned problem by enabling the stopper member to be easily inserted even when the space above the substructure is narrow, and to further spread the wedge-shaped jack device.

[0010]

In order to solve the above-mentioned problems, the present invention provides a wedge-shaped driving member having at least an upper surface formed with an inclined surface, and one of upper and lower surfaces slidingly contacting the inclined surface of the wedge-shaped driving member. A single or two wedge-shaped pressure-receiving members forming an inclined surface having an inclined angle and forming a horizontal surface on the other side are stacked and accommodated in the housing with their inclined surfaces in contact with each other, and the wedge-shaped driving member is lengthened in the housing. The wedge-shaped pressure-receiving member restricts movement in the horizontal direction, and the upper portion of the wedge-shaped pressure-receiving member located above the wedge-shaped driving member is disposed so as to protrude from the upper opening of the housing. A wedge-shaped jack in which a cylinder of a hydraulic cylinder jack is detachably mounted by penetrating a piston rod through a mounting side wall of a housing, and a tip of the piston rod is detachably connected to a thick end of the wedge-shaped driving member. You configure the location.

Here, the cylinder and the piston rod of the hydraulic cylinder jack can be detachably attached to the mounting side wall of the housing and the thick end of the wedge-shaped driving member from a direction parallel to the moving direction of the wedge-shaped driving member. To be,
Alternatively, it is preferable that the cylinder and the piston rod of the hydraulic cylinder jack can be detachably attached to a mounting side wall of the housing and a thick end of the wedge-shaped drive member from a direction orthogonal to a moving direction of the wedge-shaped drive member. .

Further, according to the present invention, a wedge-shaped drive member having a horizontal surface formed on a lower surface and an inclined surface formed on an upper surface, and an inclined surface having the same inclination angle slidably in contact with the inclined surface of the wedge-shaped drive member is formed on a lower surface; A wedge-shaped pressure-receiving member having a horizontal surface formed on the upper surface is stacked and accommodated in the housing by contacting the inclined surfaces with each other, and the horizontal surface of the wedge-shaped driving member can be moved in the length direction on the base plate of the housing; and The wedge-shaped pressure receiving member is disposed so that the upper portion thereof protrudes from the upper opening of the housing in a state where the movement of the wedge-shaped pressure receiving member is restricted in the horizontal direction, and in this state, the cylinder of the hydraulic cylinder jack is moved from the direction parallel to the moving direction of the wedge-shaped driving member. A notched male thread is formed at the end of the cylinder so that the piston rod is made detachable by penetrating the mounting side wall and the tip of the piston rod is made detachable at the thick end of the wedge-shaped drive member. A notched female screw into which the notched male screw can be inserted and rotated by a predetermined angle so as to be engaged with the inner periphery of the mounting hole penetrating the mounting side wall; A fixing pin for fixing the connecting tool, forming a connecting recess at the thick end of the wedge-shaped driving member, into which the connecting tool can be inserted, and engaging and disengaging the annular concave groove of the connecting tool fitted into the connecting recess. The wedge-shaped jack device provided was constructed.

In this case, a rotation regulating pin is provided in a through hole penetrating from the upper end surface or the side end surface of the mounting side wall to the mounting hole so as to be able to protrude and retract from the mounting hole. An engagement portion for engaging the rotation restricting pin is provided at a position corresponding to the rotation restricting pin in a state where the notched male screw and the notched female screw are engaged with each other. When a side opening is formed at one or both guide side walls of the housing and along the base plate from the mounting side wall, and a wedge-shaped drive member is pushed and moved by a piston rod of the hydraulic cylinder jack. A single or a plurality of rectangular parallelepiped stopper members are inserted from the side openings between the thick end portion of the wedge-shaped driving member and the mounting side wall, and the annular groove of the connecting member is provided. Disengage The fixing pin disengagement operation is preferably made by performing a lateral opening formed in the guide side walls of the housing.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the accompanying drawings. 1 to 4 show a typical embodiment of a wedge-shaped jack device of the present invention. In the drawings, reference numeral 1 denotes an apparatus main body, 2 denotes a hydraulic cylinder jack, 3 denotes a housing, 4 denotes a wedge-shaped driving member, and 5 denotes a wedge-shaped pressure-receiving member. Reference numeral 6 denotes a plate-like shoe, and 7 denotes a stopper member.

The wedge-shaped jack device according to the present invention comprises a device body 1.
And a hydraulic cylinder jack 2 detachable from the apparatus main body 1. After lifting the structure, the hydraulic cylinder jack 2 is removed from the apparatus main body 1 and mounted on another apparatus main body 1 at another site. A wedge-shaped jack device can be constructed, and the operation of attaching and detaching the device main body 1 and the hydraulic cylinder jack 2 and the operation of attaching the stopper can be performed even when there is no extra space above.

The apparatus main body 1 has a housing 3 in which a wedge-shaped driving member 4, a wedge-shaped pressure receiving member 5, and a plate-like shoe 6 are laminated and arranged. The cylinder 8 of the hydraulic cylinder jack 2 is detachably mounted on the housing 3. , And the piston rod 9 of the hydraulic cylinder jack 2 is detachably connected to the wedge-shaped pressure receiving member 5, and the stopper members 7,. Things.

The housing 3 has guide side walls 11 and 11 on both sides of a base plate 10 and a mounting side wall 12 for mounting the cylinder 8 on a front end thereof. It has a structure in which a reaction force receiving plate 13 is fixed and an upper opening 14 is formed in front of the reaction force receiving plate 13. More specifically, the housing 3 is formed in a box shape with guide side walls 11, 11 on both sides of a base plate 10, a mounting side wall 12 at a front end, and a rear wall 15 at a rear end. , 1
1 and the reaction force receiving plate 13 is fixed to the upper end of the rear wall 15,
A space between the two guide side walls 11, 11 and between the front of the reaction force receiving plate 13 and the mounting side wall 12 forms an upper opening 14. In this space, the wedge-shaped driving member 4, the wedge-shaped pressure receiving member is provided. The member 5 and the plate-like shoe 6 are sequentially laminated. As shown in FIG. 4, a sliding plate 16 having substantially the same shape as the plate-like shoe 6 may be laid on the base plate 10, and the wedge-shaped driving member 4 may be laminated on the sliding plate 16. In this case, a regulating plate 17 for regulating the rearward movement of the sliding plate 16 is interposed and fixed between the rear wall 15 and the sliding plate 16. Further, in the present embodiment, the casing 3 is formed by welding a thick steel plate. However, in order to reduce the weight, the casing 3 is formed of a high-strength lightweight material, for example, an aluminum alloy or titanium. It is also possible to form it by casting for reduction.

The wedge-shaped driving member 4 has a horizontal surface 18 on its lower surface.
And a tapered member having an inclined surface 19 formed on the upper surface, and is preferably formed of a high-strength, lightweight material such as an aluminum alloy or titanium for easy handling. Further, the wedge-shaped pressure receiving member 5 has an inclined surface 2 having the same inclination angle which slides on the lower surface with the inclined surface 19 of the wedge-shaped driving member 4.
0 and a horizontal plane 21 formed on the upper surface. The material is the same as that of the wedge-shaped drive member 4.
The plate-shaped shoe 6 has horizontal upper and lower surfaces, is stacked on the horizontal surface 21 of the wedge-shaped pressure receiving member 5, and is slidable in the horizontal surface. Note that the plate-like shoe 6 can be formed as a single metal plate, but a laminated plate of a metal plate and a rubber plate,
Alternatively, it is preferable to use a composite plate of a metal material and a rubber material.

The wedge-shaped driving member 4 and the wedge-shaped pressure receiving member 5
Are brought into contact with each other on the inclined surfaces 19 and 20 to make the housing 3
And the horizontal surface 18 of the wedge-shaped drive member 4 is extended along the two guide side walls 11 on the base plate 10 of the housing 3 or on the slide plate 16 laid on the base plate 10. And the vertical thick end face 22 of the wedge-shaped pressure-receiving member 5 is connected to the vertical guide face 2 at the front end of the reaction force receiving plate 13.
The upper part of the housing 3 is arranged so as to protrude from the upper opening 14 of the housing 3 in a state of being restricted from moving in the horizontal direction by sliding contact with the housing 3. In this state, when the wedge-shaped driving member 4 is pushed in, the wedge-shaped pressure receiving member 5 in which the inclined surfaces 19 and 20 are in sliding contact with each other rises, and lifts a large structure such as a bridge girder of a bridge via the plate-like shoe 6. You do it. In addition, in order to reduce the frictional resistance of each member, a sliding sheet made of tetrafluoroethylene resin or the like in which an additive is impregnated on the inclined surface 20, the horizontal surface 21, the upper surface of the sliding plate 16, and the like of the wedge-shaped pressure receiving member 5. 24, ... are buried. Here, instead of the sliding sheet 24, it is also possible to coat each surface with a material having low frictional resistance by plating or other surface treatment.

The cylinder 8 of the hydraulic cylinder jack 2 is moved in a direction parallel to the moving direction of the wedge-shaped driving member 4.
The piston rod 9 is made detachable by penetrating the mounting side wall 12 of the housing 3 and the tip of the piston rod 9 is detachably attached to the thick end 25 of the wedge-shaped drive member 4. Therefore, a notched male screw 2 is attached to the end of the cylinder 8.
6, and a notched female screw 28 is formed on the inner periphery of a mounting hole 27 penetrating through the mounting side wall 12 so that the notched male screw 26 can be inserted and rotated by a predetermined angle to engage. Further, a cylindrical connecting member 29 is fixed to the tip of the piston rod 9, the connecting member 29 has an annular concave groove 30, and a connecting concave portion 31 formed in the thick end portion 25 of the wedge-shaped driving member 4. The stopper 29 is inserted into the wedge-shaped drive member 4 so as to be detachable.
Are engaged with and connected to the annular groove 30. Therefore, on one side surface of the wedge-shaped driving member 4, the insertion hole 3 into which the retaining pin 32 can be inserted and which communicates with the coupling recess 31 is provided.
3 is formed. Further, in the present embodiment, in a state where the retaining pin 32 is inserted into the insertion hole 33, the retaining pin 3
A female screw 34 is formed at the mouth of the insertion hole 33 so that the female screw 2 does not come off unexpectedly.
Is formed at the base of the retaining pin 32. However, the connection structure between the cylinder 8 and the mounting side wall 12 and the connection structure between the piston rod 9 and the wedge-shaped drive member 4 can be appropriately adopted as long as they are equivalent means other than the above-described structure.

A rotation restricting pin 37 is provided in a through hole 36 penetrating from the upper end surface or side end surface of the mounting side wall 12 to the mounting hole 27 so as to be able to protrude and retract from the mounting hole 27. An engagement portion 38 is provided at an end corresponding to the rotation restricting pin 37 at a position corresponding to the rotation restricting pin 37 in a state where the notched male screw 26 and the notched female screw 28 are engaged.

A side opening 39 is formed on one side of the housing 3 along the moving direction of the wedge-shaped drive member 4 at a position along the base plate 10 from the mounting side wall 12 along the guide side wall 11. The thick end portion 25 and the mounting side wall 12 of the wedge-shaped drive member 4 generated when the wedge-shaped drive member 4 is pushed and moved by the piston rod 9 of the hydraulic cylinder jack 2 are formed.
And between the stopper member 7,
Are inserted from the side openings 39 to be interposed. Further, the insertion hole 33 is inserted into the side opening 39.
The engaging operation of the retaining pin 32 engaging and disengaging from the annular groove 30 of the connecting tool 29 is performed at the side opening 3.
9 is available. Further, although not shown, a cover that can be opened and closed is provided at the side opening 39, and a flexible member is provided between the periphery of the plate-like shoe 6 and the periphery of the upper opening 14 of the housing 3. By providing a cover,
Foreign matter is prevented from entering the sliding surfaces of the wedge-shaped driving member 4 and the wedge-shaped pressure receiving member 5. Further, the base plate 1 of the housing 3
0, a ground plate 40 for receiving a full load is protruded from a portion corresponding to a position directly below the plate-like shoe 6, and even if the surface on which the wedge-shaped jack device is placed has irregularities, the ground plate 40 It is only necessary to level the ground corresponding to the level and adjust the level. The ground plate 40 may be formed integrally with the base plate 10 when the housing 3 is integrally formed by casting.

Next, a method of using the wedge-shaped jack device according to the present invention will be briefly described with reference to FIG. First, the apparatus main body 1 is installed at a predetermined position, and the mounting side wall 1 of the housing 3 is mounted.
The connecting tool 29 of the hydraulic cylinder jack 2 and the piston rod 9 are inserted into the mounting holes 27 provided in the
The notched male screw 26 at the tip of the notch female screw 2 of the mounting hole 27
After being inserted into the cylinder 8, it is rotated and meshed, and the rotation restricting pin 37 is inserted and engaged with the engaging portion 38 of the cylinder 8 to be attached.
4 and the retaining pin 32 is inserted into the insertion hole 33 from the side opening 39 to engage with the annular groove 30 to prevent the pin from being removed (see FIG. 4A). then,
When the hydraulic cylinder jack 2 is driven to push the wedge-shaped driving member 4, the wedge-shaped pressure receiving member 5 is raised by sliding of the inclined surfaces 19 and 20, and a structure (not shown) is lifted. After lifting the structure to a predetermined height, a predetermined number of stopper members 7,... Are inserted from the side opening 39 between the mounting side wall 12 and the thick end portion 25 of the wedge-shaped driving member 4, The wedge-shaped drive member 4 is detented (see FIG. 4B). In this state, even if the pressure of the hydraulic pressure supplied to the cylinder 8 for driving the hydraulic cylinder jack 2 is reduced, the wedge-shaped pressure-receiving member 5 and the plate-like shoe 6 can be stopped by the stopper member 7,
.. Prevents the wedge-shaped drive member 4 from returning because the wedge-shaped drive member 4 is not stopped, so that the hydraulic cylinder jack 2 is no longer necessary. Therefore, the retaining pin 32
Is removed from the annular groove 30, the rotation regulating pin 37 is removed from the engagement portion 38, and the cylinder 8 is rotated to disengage the notched male screw 26 and the notched female screw 28, and the cylinder 8 is attached to the mounting hole 27. The hydraulic cylinder jack 2 is completely separated from the apparatus main body 1 (FIG. 4).
(c)). This removed hydraulic cylinder jack 2
Can be connected to the apparatus main body 1 in another place in the same procedure as described above and used for lifting. In order to lift the structure, the hydraulic cylinder jack 2 is connected to the apparatus main body 1 and the wedge-shaped drive member 4 is slightly pushed in to remove the stopper members 7. The piston rod 9 may be pulled into the cylinder 8 by gradually lowering or reducing the hydraulic pressure, and the wedge-shaped drive member 4 may be moved backward.

Next, another embodiment of the wedge-shaped jack device of the present invention will be described with reference to FIGS. In the present embodiment, the wedge-shaped pressure receiving member 42 is used as the wedge-shaped driving member 4 instead of the sliding plate 16 in such a manner that the inclined surfaces 19 and 41 are formed on the upper surface and the lower surface, respectively. An inclined surface 43 having the same inclination angle as the inclined surface 41 is formed on the upper surface of the member 42. And the housing 3
The cylinder 8 of the hydraulic cylinder jack 2 is removably mounted on the mounting side wall 12 of the hydraulic cylinder jack.
2, a rectangular opening 44 opened upward is formed.
A square connecting plate 4 for fixing the cylinder 8 is formed by forming a meshing portion 45 having a sawtooth cross section on both side edges and a lower edge facing the cylinder 4.
A meshing portion 47 having a saw-tooth cross section is formed around the periphery of the connecting member 6, and a connecting plate 46 is fitted into the opening 44 from above, and the respective meshing portions 45,
At the same time, the pressing member 48 is screwed from above into the upper end of the mounting side wall 12, and the engaging portion 49 having a sawtooth cross section formed on the lower surface of the pressing member 48 is engaged with the upper engaging portion 47 of the connecting plate 46. It adopts the structure to make it. The connecting plate 46 has a screw hole 50 formed at the center thereof and a screw shaft 51 formed at the tip of the cylinder 8.
Is fixed by screwing. Therefore, the connection plate 46
The hydraulic cylinder jack 2 in a state where the hydraulic cylinder jack 2 is fixed to the cylinder 8 can be detachably mounted on the apparatus main body 1 from above.

In the case of this embodiment, the wedge-shaped drive member 4 moves up and down by the push-pull movement of the wedge-shaped drive member 4, so that the connection structure between the piston rod 9 and the wedge-shaped drive member 4 is a piston rod 9 for wedge-shaped drive member 4
Must be able to move up and down.
Therefore, as shown in FIG. 5 and FIG.
A neck portion 53 and a head portion 54 are formed so as to form a letter shape, and an engagement groove 55 having a substantially T-shaped cross section is formed in the center of the end surface of the thick end portion 25 of the wedge-shaped drive member 4 in the vertical direction. The neck 53 and the head 54 of the connecting tool 52 are slidably engaged with the engaging groove 55 from above. Other configurations are the same as those of the above-described embodiment, and therefore, the same configurations are denoted by the same reference numerals and description thereof will be omitted.

Finally, instead of the stopper means having a structure in which the stopper member 7 is inserted from the side opening 39 formed in the guide side wall 11 of the housing 3, a stopper means shown in FIG. 8 can be adopted. It is. That is, the vertically elongated elliptical holes 56, 56 are provided on both sides of the mounting hole 27 of the mounting side wall 12.
A fixed nut 57 is fixed to the lower end of each oval hole 56 and the outer surface of the mounting side wall 12, and a movable nut 58 is also rotatably pivoted to the fixed nut 57. In a state where the fixed nut 57 and the movable nut 58 are joined and the rotation of the movable nut 58 is regulated by an appropriate fastening tool 59, a screw hole 60 is formed by the fixed nut 57 and the movable nut 58, A long stopper bolt 61 is screwed into the screw hole 60, and the stopper bolt 6
1 is a structure in which the thick end portion 25 of the wedge-shaped drive member 4 is abutted at the tip of the drive member 4. In order to quickly abut the thick end 25 of the wedge-shaped drive member 4 at a predetermined position with the tip of the stopper bolt 61, the stopper nut 61 is placed above the oblong hole 56 with the movable nut 58 opened. Through which the tip comes into contact with the thick end portion 25 of the wedge-shaped drive member 4, and then the stopper bolt 61 is moved downward to mesh with the half screw hole 60 of the fixed nut 57, and the movable nut 58 is closed. The half screw holes 60 are engaged with each other and fixed with the fastening tool 59, and in this state, the stopper bolt 61 is rotated to press the tip thereof against the thick end portion 25 of the wedge-shaped drive member 4.

The present invention is not limited to the illustrated embodiment, but may be inferred from the contents described in the specification and drawings of the present invention, or may have the same function as long as the gist of the present invention is followed. The present invention also includes those replaced by the means.

Further, the use of the wedge-shaped jack device of the present invention is not limited to merely lifting and lifting large structures, and can be utilized in the field of hydraulic presses as an application range. For example, if it is used for a press that requires aging molding of a high molecular weight material, etc., it is possible to solve one problem that hinders the spread of excellent high molecular weight materials due to the high cost of a normal hydraulic press. it can.

[0029]

According to the wedge-shaped jack device of the present invention described above, after lifting a structure, the hydraulic cylinder jack, which is unnecessary until the lifting operation, can be easily removed from the device body. The wedge-shaped jack device can be used in another work site and incorporated in the device body of another wedge-shaped jack device, and can be shared by a plurality of work sites, thereby greatly contributing to cost reduction of the wedge-shaped jack device, repair of the bearing, Replacement construction cost can be reduced, originally excellent performance,
It is possible to further spread the easy-to-use wedge-shaped jack device, which greatly contributes to the civil engineering and construction fields as well as to the industry. In particular, when the hydraulic cylinder jack can be attached to and detached from the apparatus main body from a direction parallel to the moving direction of the wedge-shaped drive member, the operation of attaching and detaching the hydraulic cylinder jack becomes extremely simple, and is performed even when there is no extra space above. be able to. In addition, when inserting and removing the stopper member from the side of the housing, the stopper member can be inserted even when there is no extra space above.

Further, even when a horseshoe-shaped stopper member cannot be loaded from above in a conventional wedge-shaped jack device in an RC concrete bridge or the like, the stopper member can be loaded from the side opening, thereby working in a narrow space. Is now available. In addition, with the structure where the stopper member is loaded from the side, it is possible to minimize incidental work such as concrete bridge substructure (abutment) and bridge girder hanging, and the construction period can be significantly shortened. In addition, the restriction on the installation direction of the wedge-shaped jack device has become unnecessary for steel bridges.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a typical embodiment of a wedge-shaped jack device of the present invention.

FIG. 2 is a partial perspective view showing a connection structure between a piston rod and a wedge-shaped drive member of a hydraulic cylinder jack.

FIG. 3 is a partial cross-sectional view showing the connection structure.

FIG. 4 shows a use state of the wedge-shaped jack device, (a) is a sectional view of an initially installed state, (b) is a sectional view of a lifting state, and (c) is a state in which a hydraulic cylinder jack is removed after lifting. It is sectional drawing.

FIG. 5 is a partial sectional view showing another embodiment of the wedge-shaped jack device of the present invention.

FIG. 6 is an exploded perspective view of a main part showing a connection structure between a cylinder and a housing of the hydraulic cylinder jack.

FIG. 7 is a partial perspective view showing a connection structure between a piston rod and a wedge-shaped drive member of a hydraulic cylinder jack.

FIG. 8 is a partial perspective view showing another structure of the stopper means.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Apparatus main body 2 Hydraulic cylinder jack 3 Housing 4 Wedge-shaped drive member 5 Wedge-shaped pressure-receiving member 6 Plate-shaped shoe 7 Stopper member 8 Cylinder 9 Piston rod 10 Base plate 11 Guide side wall 12 Mounting side wall 13 Reaction force receiving plate 14 Upper opening 15 Rear Wall 16 Sliding plate 17 Restriction plate 18 Horizontal plane 19 Inclined surface 20 Inclined surface 21 Horizontal surface 22 Thick end surface 23 Guide surface 24 Sliding sheet 25 Thick end 26 Notched male screw 27 Mounting hole 28 Notched female screw 29 Connector 30 annular concave Groove 31 Connecting recess 32 Stopper pin 33 Insertion hole 34 Female screw 35 Male screw 36 Through hole 37 Rotation restricting pin 38 Engagement part 39 Side opening 40 Ground plate 41 Inclined surface 42 Wedge-shaped pressure receiving member 43 Inclined surface 44 Opening 45 Meshing Part 46 connecting plate 47 engaging part 48 holding member 49 engaging part 50 screw hole 51 screw shaft 52 connecting tool 3 neck 54 head 55 engaging groove 56 oblong hole 57 fixing nut 58 movable nut 59-engaging member 60 screw hole 61 stopper bolt

Claims (7)

[Claims] 1. A wedge-shaped drive member having at least an inclined surface formed on an upper surface, and a slope formed at one of upper and lower surfaces having the same inclination angle in sliding contact with the slope of the wedge-shaped drive member, and a horizontal surface formed at the other. Alternatively, the two wedge-shaped pressure receiving members are stacked and accommodated in the housing with the inclined surfaces of the two being in contact with each other, and the wedge-shaped driving members are movable in the length direction within the housing, and the wedge-shaped pressure receiving members are moved in the horizontal direction. The upper part of the wedge-shaped pressure receiving member, which is located above the wedge-shaped driving member, is arranged so as to protrude from the upper opening of the housing, and in this state, the cylinder of the hydraulic cylinder jack is attached to the mounting side wall of the housing by the piston rod. A wedge-shaped jack device characterized in that the piston rod is detachably mounted by penetrating, and the tip of the piston rod is detachably connected to the thick end of the wedge-shaped drive member. 2. A cylinder and a piston rod of the hydraulic cylinder jack are detachably attached to a mounting side wall of the housing and a thick end of the wedge-shaped driving member from a direction parallel to a moving direction of the wedge-shaped driving member. The wedge-shaped jack device according to claim 1, wherein 3. A cylinder and a piston rod of the hydraulic cylinder jack are detachably attached to a mounting side wall of the housing and a thick end of the wedge-shaped driving member from a direction orthogonal to a moving direction of the wedge-shaped driving member. The wedge-shaped jack device according to claim 1, wherein 4. A wedge-shaped drive member having a horizontal surface formed on a lower surface and an inclined surface formed on an upper surface, and an inclined surface having the same inclination angle formed in sliding contact with the inclined surface of the wedge-shaped drive member on a lower surface, and having a horizontal surface formed on an upper surface. The formed wedge-shaped pressure-receiving member is stacked and housed in the housing with the inclined surfaces thereof in contact with each other, the horizontal surface of the wedge-shaped driving member is movable in the length direction on the base plate of the housing, and the wedge-shaped pressure-receiving member is provided. In a state where movement in the horizontal direction is restricted, the upper part is arranged so as to protrude from the upper opening of the housing, and in this state, the cylinder of the hydraulic cylinder jack is attached to the mounting side wall of the housing from a direction parallel to the moving direction of the wedge-shaped drive member. A notched male screw is formed at the end of the cylinder so that the piston rod can be detachably inserted through the piston rod and the tip of the piston rod can be detachably attached to the thick end of the wedge-shaped drive member. A notched female screw is formed on the inner periphery of the mounting hole penetrating through the wall so that the notched male screw can be inserted and rotated by a predetermined angle to engage with it, and a connector having an annular concave groove at the tip of the piston rod is fixed. The wedge-shaped drive member further includes a connection recess formed at a thick end of the wedge-shaped driving member, into which the connection tool can be inserted, and a locking pin which is engaged with and disengaged from the annular groove of the connection tool fitted into the connection recess. A wedge-shaped jack device. 5. A rotation control pin is provided in a through hole penetrating the mounting hole from an upper end surface or a side end surface of the mounting side wall so as to be able to protrude and retract from the mounting hole. The wedge-shaped jack device according to claim 4, further comprising an engagement portion for engaging the rotation restricting pin at a position corresponding to the rotation restricting pin in a state where the notched male screw and the notched female screw are engaged. 6. A side opening is formed at one or both guide side walls of the housing along a moving direction of the wedge-shaped driving member and at a position along the base plate from the mounting side wall, Between the thick end of the wedge-shaped drive member and the mounting side wall generated when the wedge-shaped drive member is pushed and moved by the piston rod of the hydraulic cylinder jack, one or more stopper members having a rectangular parallelepiped shape are inserted from the side opening. The wedge-shaped jack device according to claim 4, which is inserted and interposed. 7. The wedge-shaped jack device according to claim 4, wherein an operation of engaging and disengaging a retaining pin which engages with and disengages from the annular groove of the connecting member is performed from a side opening formed in a guide side wall of the housing. .