JP2001151479A - Speed reduction gear type wedge jack device with load detecting function and reaction introducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a speed reduction gear type wedge jack device with load detecting function and a reaction introducing device adopting a mechanical push-pull means without using a hydraulic cylinder jack or a hydraulic center hole jack to be a defect a conventional jack, constituted inexpensively in the whole of the devices, attaining further miniaturization and lightening, free in maintenance, excellent in handleability, workability and safety, particular, and capable of monitoring loaded in real time while a heavy structure is lifted. SOLUTION: These devices are constituted by laminating and storing a wedge driving member 4 and a wedge pressure receiving member 5 within a body of equipment by brining inclined surface 7, 9 into contact with each other, fixing a speed reduction gear unit 2 having a high number of revolution shaft 11 and a low number of revolution shaft to a vertical receiving plate 24 of the body of equipment, screwing a screw shaft part 14 of a driving shaft 13 extended to the low number of revolution shaft into a screw hole part 15 provided at the inside of the wedge driving member and interposing single or a plurality of load cells 6 between the wedge pressure receiving member and the vertical receiving plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reduction gear with a load detecting function for lifting and supporting a heavy structure such as a bridge, for example, for mounting and replacing a bearing device interposed between a substructure and a substructure. Lifting and supporting heavy structures such as wedge-shaped jack devices and bridges against substructures, and a reduction gear-type reaction force introduction with a load detection function that can be used as a bearing device while maintaining the reaction force introduced state Related to the device.

[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, a lifting method for a bridge or the like for safely and easily lifting the structure and a wedge-shaped jack device used for the method have been developed (for example, Japanese Patent Publication No. 4-54002 (Patent No. 1).
No. 769812), Japanese Patent Publication No. Hei 8-11679 (Patent No. 2)
No. 095537), Patent No. 2,570,092, and U.S. Pat. No. 4,944,492). In addition, a semi-permanent stationary reaction force introducing shoe that lifts and supports a structure and then acts as a bearing device by itself has been proposed (Japanese Patent No. 280).
No. 9114), which is partly implemented.

The wedge-shaped jack devices described in these publications stack a wedge-shaped drive member and one or two wedge-shaped pressure-receiving members with their inclined surfaces aligned with each other, and lengthen the wedge-shaped drive member with a hydraulic cylinder jack. By pushing and pulling in the direction, the upper wedge-shaped pressure receiving member moves upward with the sliding of the wedge-shaped drive member against the inclined surface, and the structure is lifted. 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. Further, the reaction force introducing shoe described in the above-mentioned publication is such that the wedge-shaped jack device, which was a temporary support, can be used by permanently supporting it by changing a stopper mechanism or the like. The principle described above is basically the same as that of the wedge-shaped jack device. In addition, the hydraulic cylinder jack used for the conventional wedge-shaped jack device was attached to the main body housing with a fine screw structure, so it has a structure that can not be easily removed. A hydraulic center hole jack is adopted, and after lifting, the stopper is activated and the unnecessary hydraulic center hole jack is removed.

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. In addition, there is a growing demand for economical and safe jacks. On the other hand, the only reason that the screw-lock type jack makes use of its width is that it is inexpensive.On the other hand, the conventional wedge-shaped jack device is not popular because it is expensive because it uses a hydraulic cylinder jack. The superiority of the wedge-shaped jack device has already been established in terms of performance. Similarly, expensive hydraulic cylinder jacks or hydraulic center hole jacks are used for the reaction force introducing shoe, which hinders cost reduction.
Further, the inevitable disadvantages of using a hydraulic jack are that a poor connection of a pressure-resistant hose connected between the hydraulic pump and the hydraulic jack may cause a serious accident, and frequently change the oil. Maintenance is required, and the heavy weight makes it difficult to handle and work.
And the like.

[0007] When lifting heavy structures such as bridges, it is important from the viewpoint of safety of the lifting work management to monitor how much load is actually applied to the wedge-shaped jack device. In a conventional wedge-shaped jack device, a hydraulic jack is used as a driving means, so that the operation is performed while visually checking the pressure of the hydraulic oil with a pressure gauge. However, since the load applied to the wedge-shaped jack device is not proportional to the oil pressure, the actual applied load cannot be known until a predetermined pressure is reached. In addition, since hydraulic oil gradually escapes from the inside of the cylinder, management for maintaining a constant lifting force was also difficult. This means
This is a particularly difficult problem in large-scale construction using a large number of wedge-shaped jack devices at the same time.

[0008]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention seeks to solve the above problems by using an expensive hydraulic cylinder jack or hydraulic center which is a disadvantage of the conventional wedge-shaped jack device or reaction force introducing shoe. By using a mechanical push / pull means that combines a reduction gear and bolts and nuts without using a hole jack, the entire device can be constructed at low cost, and further downsizing and weight reduction can be achieved. A reduction gear type wedge-shaped jack device with a load detection function that is free and has particularly excellent handleability, workability and safety, and is capable of monitoring the loaded load in real time while lifting heavy structures. It is intended to provide a force introduction device.

[0009]

According to the present invention, there is provided a wedge-shaped driving member having an inclined surface formed on an upper surface thereof.
A wedge-shaped pressure receiving member having a lower surface formed with an inclined surface having the same inclination angle that is in sliding contact with the inclined surface of the wedge-shaped driving member and having a horizontal mounting surface formed on the upper surface is laminated in the housing by making the inclined surfaces contact each other. A drive shaft accommodating and fixing a reduction gear unit having a high rotation speed axis and a low rotation speed axis to the outside of the vertical receiving plate of the housing, extending to the low rotation speed axis, and penetrating the vertical receiving plate. The screw shaft portion is inserted into the inside from the thin end portion side along the moving direction of the wedge-shaped drive member and screwed into the screw hole provided therein, and the thick end surface of the wedge-shaped pressure receiving member is perpendicular to the thick end surface. A single or a plurality of load cells are interposed between the inner surface of the receiving plate and the high-speed shaft is rotated by a rotation driving means, and the wedge-shaped pressure receiving member is lowered and raised by pushing and pulling the wedge-shaped driving member. At the same time, the wedge-shaped drive member was pulled toward the vertical receiving plate. In, and constitute a load detection function reduction gear type wedge-shaped jack apparatus the horizontal load becomes detected by the load cell in the vertical receiving plate direction of the wedge-shaped pressure receiving member by vertical load of heavy applied to the mounting surface.

Specifically, the reduction gear type wedge-shaped jack device with a load detection function of the present invention exposes the high rotation speed shaft of the reduction gear unit to the outside and includes a drive shaft extending to the low rotation speed shaft. A threaded portion of a block body which is inserted into the housing through the vertical receiving plate from one end along the moving direction of the wedge-shaped drive member, and a screw shaft formed on the drive shaft is embedded in the wedge-shaped drive member. The two load cells are screwed together and fixed at a symmetrical position on the thick end face of the wedge-shaped pressure-receiving member and sandwiching the drive shaft.

Here, it is preferable that the rotation drive means is an operation handle or an electric rotary tool detachably connected to a high rotation speed shaft.

Further, the present invention provides a wedge-shaped drive member having an inclined surface formed on an upper surface on a base plate fixed to a substructure, and an inclined surface having the same inclination angle slidably contacting the inclined surface of the wedge-shaped drive member on a lower surface. A wedge-shaped pressure receiving member formed and having a horizontal mounting surface formed on the upper surface is laminated with the inclined surfaces of the wedge-shaped pressure receiving members in contact with each other, and a plate-shaped shoe is mounted on the mounting surface of the wedge-shaped pressure receiving member.
A reduction gear unit having a high rotation speed axis and a low rotation speed shaft was fixed outside a vertical receiving plate fixed to one end of the base plate, extended to the low rotation speed axis, and penetrated through the vertical receiving plate. A screw shaft portion of the drive shaft is inserted into the inside from the thin end portion side along the moving direction of the wedge-shaped driving member and screwed into a screw hole provided therein, and a thick end surface of the wedge-shaped pressure receiving member. A single or a plurality of load cells are interposed between the inner surface of the vertical receiving plate, and the high-speed rotation shaft is rotated by the rotation driving means to pull the wedge-shaped driving member toward the vertical receiving plate side, and The upper wedge-shaped pressure-receiving member is lifted to lift and support a heavy structure such as a bridge with the plate-shaped shoe, and the horizontal load of the wedge-shaped pressure-receiving member in the vertical receiving plate direction due to the vertical load of the heavy object applied to the mounting surface. Gear type reaction force guide with load detection function You configure the device.

More specifically, a high-speed shaft of the reduction gear unit is exposed to the outside, and a drive shaft extending on the low-speed shaft is vertically moved from one end along the moving direction of the wedge-shaped drive member. A screw shaft portion inserted through the receiving plate into the housing and formed on the drive shaft is screwed into a screw hole of a block body embedded in the wedge-shaped driving member, and the two load cells are connected to the thickness of the wedge-shaped pressure receiving member. It is a meat end surface and is fixed at a symmetrical position across the drive shaft.

Also in this case, it is preferable that the rotary drive means is an operation handle or an electric rotary tool detachably connected to the high rotation speed shaft. When the plate-like shoe is a single piece of hard rubber or a laminate of a metal plate and hard rubber, the shoe functions as a rubber shoe.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the accompanying drawings. 1 to 3 show an embodiment of a reduction gear type wedge-shaped jack device A with a load detection function of the present invention,
FIG. 4 shows a more specific form, wherein reference numeral 1 denotes a jack body, 2 denotes a reduction gear unit, 3 denotes a housing, 4 denotes a wedge-shaped driving member, 5 denotes a wedge-shaped pressure receiving member, and 6 denotes a load cell. .

Reduction gear type wedge-shaped jack device A of the present invention
A wedge-shaped driving member 4 having an inclined surface 7 formed on the upper surface and a horizontal surface 8 formed on the lower surface, and an inclined surface 9 having the same inclination angle slidingly contacting the inclined surface 7 of the wedge-shaped driving member 4 on the lower surface. And a wedge-shaped pressure-receiving member 5 having a horizontal mounting surface 10 formed in the housing 3 of the jack main body 1 with the inclined surfaces 7 and 9 in contact with each other. A drive shaft 1 having a reduction gear unit 2 having a number of shafts 12 fixed to the housing 3 and extending on a low rotation speed shaft 12.
3 is screwed into a screw hole 15 provided inside the wedge-shaped drive member 4, and the high-speed shaft 11 is
The wedge-shaped driving member 4 is pushed and pulled to lower and raise the upper wedge-shaped pressure receiving member 5.

In this embodiment, the screw hole 15 provided inside the wedge-shaped drive member 4 is formed in a block 17 embedded in the wedge-shaped drive member 4, and the drive shaft 1
3 along the direction of movement of the wedge-shaped drive member 4
The screw shaft portion 14 is screwed into the screw hole portion 15 of the block body 17 by inserting the screw shaft portion 14 into the insertion hole 19 that penetrates into the inside from the 8 side. The wedge-shaped driving member 4 is pulled toward the reduction gear unit 2 side to raise the upper wedge-shaped pressure receiving member 5, and the bridge girder of a bridge placed on the mounting plate 20 mounted on the mounting surface 10 of the wedge-shaped pressure receiving member 5. It lifts and supports heavy structures. As the rotation driving means 16, an operation handle (not shown) or an electric rotary tool 21 detachably connected to the high rotation speed shaft 11 of the reduction gear unit 2 is used.

More specifically, the jack main body 1 has a housing 3 in which a wedge-shaped driving member 4 and a wedge-shaped pressure-receiving member 5 are laminated and arranged. The mounting plate 20 for receiving is placed and used. The housing 3 has guide side walls 23, 23 erected on both sides of a base plate 22, a vertical support plate 24 having a large bending strength at the front end, and a rear wall 25 erected at the rear end. The vertical receiving plate 24 has a structure in which a shaft hole 26 is formed in the center. Then, the reduction gear unit 2 is fixed to the outside of the vertical receiving plate 24, and the drive shaft 13 extending on the low rotation speed shaft 12 is passed through the shaft hole 26 to form the housing 3.
It is arranged inside. Then, the wedge-shaped driving member 4, the wedge-shaped pressure receiving member 5, and the mounting plate 20 are placed in the space of the housing 3.
Are sequentially laminated. In this embodiment, the housing 3 is formed by welding a thick steel plate. However, in order to reduce the weight, the housing 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 drive member 4 has an inclined surface 7 formed on the upper surface and a horizontal surface 8 formed on the lower surface, and the thin end portion 18 is located at the center of the inclined surface 7 from the rear end on the thick end portion 27 side. A projection 28 having a rectangular cross section is formed substantially horizontally, and the insertion hole 19 is formed in a thick portion having the projection 28. Is formed, the block 17 is dropped from above and engaged, and the screw 14 of the drive shaft 13 inserted into the insertion hole 19 is screwed into the screw 15 of the block 17. I have. The wedge-shaped pressure receiving member 5
Is formed on the lower surface with an inclined surface 9 having the same inclination angle that is in sliding contact with the inclined surface 7 of the wedge-shaped driving member 4, forms a mounting surface 10 on the upper surface, and further receives a projection 28 of the wedge-shaped driving member 4; It is a member in which a concave groove portion 30 that allows only movement in the front-rear direction is formed. A step portion 31 is formed on the mounting surface 10 on the upper surface of the wedge-shaped pressure receiving member 5 so that the portion receiving the load is one step higher than the other portions. A concave portion is appropriately formed leaving the periphery in order to engage and hold the placing plate 20. Here, the wedge-shaped driving member 4 and the wedge-shaped pressure receiving member 5 are preferably formed of a high-strength, lightweight metal material such as an aluminum alloy, titanium, or a foamed metal casting, or a polymer material in order to facilitate handling. Although the mounting plate 20 can be formed as a single metal plate, it is preferable to use a laminated plate of a metal plate and a rubber plate or 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
And the thinned ends 18 of the wedge-shaped pressure-receiving members 5 are stacked and accommodated in the housing 3 with the thin end portions 18 facing the reduction gear unit 2 side. More specifically, the wedge-shaped drive member 4 is configured such that the horizontal surface 8 is provided on the base plate 22 of the housing 3 or on a sliding plate laid on the base plate 22,
It is configured to be movable in the length direction along 3,23. Further, the wedge-shaped pressure receiving member 5 has a main body portion 33 of the load cells 6 and 6 fixed to a thick end portion 32 at a front end thereof, and a pressing portion 34 of the load cells 6 and 6 abuts on the vertical receiving plate 24 and The upper part is disposed so as to protrude from the upper opening of the housing 3 in a state of being restricted from moving in the horizontal direction by being vertically slid. Since the lateral movement of the wedge-shaped driving member 4 and the wedge-shaped pressure receiving member 5 stacked and housed in the housing 3 is regulated by the guide side walls 23, the projection 28 and the concave groove 30 are not necessarily required. However, since the insertion hole 19 is formed in the wedge-shaped driving member 4 and the recess 19 is further formed, it is preferable to provide the protrusion 28 in order to secure a sufficient tensile strength. Then, in this state, when the electric rotating tool 21 as the rotation driving means 16 is connected to the high rotation speed shaft 11 and is rotated in one direction to drive the reduction gear unit 2, the low rotation speed shaft 12 is accordingly driven. The drive shaft 13 rotates in one direction, and the block body 17 in which the screw hole portion 15 is screwed to the screw shaft portion 14 of the drive shaft 13 moves toward the front side, and the wedge-shaped drive member 4 moves to the vertical receiving plate 24. The wedge-shaped pressure receiving member 5, which is drawn to the side and in which the inclined surfaces 7 and 9 are in sliding contact with each other, rises, and lifts a heavy structure such as a bridge girder of the bridge via the mounting plate 20.

The electric rotary tool 21 has an attachment attached to the main body of a rechargeable drill driver so that it can be connected to the high-speed shaft 11. As a method for supplying electric power to the electric rotary tool 21, a commercial power supply or a portable generator can be used. When an operation handle is used as the rotation drive means 16, a ratchet is incorporated in a shaft portion connected to the high rotation speed shaft 11 so that the operation handle is reciprocated in the rotation direction. desirable.

Incidentally, in order to reduce the frictional resistance of each member, a sliding sheet or a stainless steel plate such as tetrafluoroethylene resin impregnated with an additive is laminated or embedded on the sliding surface of each member. It is also possible to coat each surface with a material having low frictional resistance by plating or other surface treatment.

When no load is applied to the wedge-shaped pressure receiving member 5, the reduction gear unit 2 is driven to draw the wedge-shaped driving member 4 toward the vertical receiving plate 24, and the wedge-shaped pressure receiving member 5 is raised. Although the load cells 6 and 6 hardly detect a load, when a heavy structure is placed on the wedge-shaped pressure receiving member 5 or when the heavy structure is lifted against The load cells 6, 6 detect the horizontal load of the wedge-shaped pressure receiving member 5 in the direction of the vertical receiving plate 24 due to the vertical load of the object, and the actual lifting force can be monitored in real time. The load cell 6
May be formed in a ring shape, and only one piece may be interposed between the thick end face 32 of the wedge-shaped pressure receiving member 5 and the vertical receiving plate 24 by penetrating the drive shaft 13.

FIG. 4 shows a more specific embodiment of the reduction gear type wedge-shaped jack device A of the present invention. Although the basic structure is the same as that described above, a description thereof will be omitted. However, the overall structure is slim so that it can be inserted into a narrow space such as a bridge and a bridge girder, and the wedge-shaped driving member 4 and the wedge-shaped pressure receiving member 5 are formed. It has a structure that covers the entire surface so that sand and rainwater do not enter the sliding surface. The high rotation speed shaft 11 of the reduction gear unit 2 is a polygonal shaft slightly projecting from the reduction gear unit 2, and the illustrated one has a hexagonal nut-like shape and drives the wedge-shaped drive member 4 in a push-pull manner. In such a case, an operation handle 20 having a built-in ratchet mechanism is connected to a joint to the high-speed shaft 11 as the rotation driving means 16. The high rotation speed shaft 11 may be formed in a quadrangular prism shape, and further, a polygonal concave portion may be formed on an end surface of the high rotation speed shaft 11. In the present embodiment, the wedge-shaped driving member 4 and the wedge-shaped pressure-receiving member 5 are stacked in the housing 3. However, an ultra-large one has the same function as the housing 3 in order to reduce the weight. The wedge-shaped drive member 4 and the wedge-shaped pressure-receiving member 5 can be moved and guided by the guide means, and can be covered with a removable protective cover so that dust does not enter the sliding surface after lifting.

The reduction gear unit 2 used in the present embodiment is constituted by combining two stages of mechanisms having a reduction ratio of 1/8 per stage in series to form a low rotation speed shaft 12 with respect to the high rotation speed shaft 11. A gear having a reduction ratio of 1/64 was used. Here, the size of the main body of the reduction gear unit 2 is the width 212
mm, height 100 mm, and axial length 126 mm. If the specifications of the reduction gear type wedge-shaped jack device A with the load detection function shown in the above embodiment are shown, the overall length is about 620 mm, the front width is about 280 mm, and the total height excluding the mounting plate 20 is 116 mm. , 9 tilt angle 6
°, the stroke of the wedge-shaped drive member 4 is 120 mm, the maximum lifting height is 12 mm, and the rated load is 100 t (about 100
The input torque of the high rotation speed shaft 11 required for lifting a heavy structure of 0 kN) is about 1 kN · cm. Therefore,
A heavy structure of 100 t can be lifted by a commercially available electric rotating tool 21. Further, by connecting the reduction gear units 2 in series in multiple stages, it is possible to lift with a lower torque and to lift a heavier important structure with the same torque. In addition, if the size of the apparatus is increased, the rated load 10
It is also possible to make 00t class jacks.

Here, as the reduction gear unit 2, a reduction gear mechanism used for a hoisting device such as a lever block, a gear and a screw mechanism of a journal jack, and the like can be employed. Other known mechanisms for converting to? A thrust bearing is generally used as a bearing mechanism that rotatably receives the low rotation speed shaft 12 or the drive shaft 13 while restricting displacement in the axial direction, but in order to receive a large push-pull force, a thrust bearing is generally used. The size of the thrust bearing is increased, which undesirably increases the axial dimension. In addition, the low rotation speed shaft 12
Alternatively, since the drive shaft 13 rotates at a low speed and does not always rotate frequently, it is not optimal to select a thrust bearing in the present embodiment. Therefore, in the present embodiment, a large-diameter portion is formed on a part of the low-rotation speed shaft 12, and a slide plate coated with a coating for enhancing slippage is interposed between the axial end surface of the large-diameter portion and the fixed surface. Therefore, it was rotatably received while restricting displacement in the axial direction. Further, in the present embodiment, the low rotation speed shaft 12 and the drive shaft 13 are made of an integral shaft, but the reduction gear unit 2 simply generates a large rotation force. The shaft 13 is a separate member,
The drive shaft 13 can be rotatably supported by the above-described slide plate bearing mechanism, while being connected to each other so as to be able to transmit a rotational force.

FIG. 3 shows an overall appearance of a reduction gear type wedge-shaped jack device A with a load detecting function according to the present invention. The wedge-shaped pressure receiving member 5 has a connector 35 for leading output signals of load cells 6 and 6 at a front end face. And the connector 35
Is connected to a cable 36, and the load is measured by a measuring device (not shown). A plurality of foldable handles 37 are attached to the side surface of the jack body 1. FIG.
Is a structure in which the connector 35 is attached to the side end surface of the wedge-shaped pressure receiving member 5, and the other structure is exactly the same as that described above.

FIG. 5 shows a state in which the bridge girder 38 is lifted by using the above-mentioned reduction gear type wedge-shaped jack device A having a load detecting function. 39, a wedge-shaped jack device A is mounted thereon, and the bridge girder 38 is lifted via the mounting plate 20.
Reference numeral 40 in the figure denotes a measuring device of the load cell 6.

The reduction gear type wedge-shaped jack device A with a load detecting function shown in FIGS. 6 and 7 reduces the width of the jack body 1 and secures a pressure receiving area so that the jack installation space can be used in a long and narrow gel bar bridge. It is of a structure that is lengthened in order to Here, the width of the jack body 1 is 180 mm, the length is 630 mm, and the rated load is set at 85 t. In this case, the lifting height H is also set.
Is 12 mm. Other configurations are the same as those described above, and thus the same configurations are denoted by the same reference numerals and description thereof will be omitted.
FIG. 6 shows a part of the side surface part cut away.

Although not particularly shown, the reduction gear type reaction force introducing device with a load detection function of the present invention is basically the same as the aforementioned reduction gear type wedge-type jack device A with a load detection function. The reduction gear type reaction force introducing device of the present invention is used as a substitute for an existing bearing device such as a bridge, or is used in parallel with a defective existing bearing device to introduce a reaction force. In this case, instead of the placing plate 20 described above, a single piece of hard rubber or a plate-like shoe made by laminating a metal plate and hard rubber is used to lift and support a heavy structure such as a bridge. Here, the reduction gear type reaction force introducing device B of the present invention needs to be maintained for many years after lifting a heavy structure such as a bridge or introducing a reaction force. by the way,
In the present invention, the wedge-shaped drive member 4 is pushed and pulled by screwing the screw shaft portion 14 of the drive shaft 13 and the screw hole portion 15 of the block body 17 embedded in the wedge-shaped drive member 4, so that the high rotation speed shaft Even if no torque is applied to the screw 11, the screw shaft portion 14 and the screw hole portion 15 do not rotate spontaneously, and therefore, a stopper means for maintaining the state is not particularly required. However, it is safe to provide the stopper means. Is preferred in the sense of increasing

Even after a predetermined reaction force is introduced to a bridge girder or the like by the reduction gear type reaction force introduction device with a load detection function of the present invention, the load is constantly or periodically monitored by the load cell 6 so that the weight is reduced. It is possible to detect the aging of the reaction force of the structure, and if the balance of the reaction force is lost or the reaction force becomes insufficient, it is possible to lift and adjust the reaction force in the same manner as described above.

FIGS. 8 to 10 show the results of tests on the performance of the reduction gear type wedge-shaped jack device A with a load detecting function according to the present invention. This test includes a load of 2
Using a 00 t (about 2000 kN) Amsler testing machine (manufactured by Shimadzu Corporation), a 1200 kN load meter (manufactured by Showa Sokki Co., Ltd.) was placed on the mounting plate 20, and a load was applied from above with the Amsler testing machine. When the vertical load and the horizontal load acting on the wedge-shaped pressure-receiving member 5 were measured using the load meter and the outputs of the load cells 6 and 6, the vertical displacement of the wedge-shaped pressure-receiving member 5 was measured with a micrometer at the same weight. 8A to 10, (a) is a graph of the vertical load with respect to the horizontal load, and (b) is a graph of the vertical load with respect to the vertical displacement, and the same test was performed three times. As a result, the reproducibility is very good, the linearity of the vertical load with respect to the horizontal load and the linearity of the vertical load with respect to the vertical displacement are also good, and it can be said that the measured value of the load cell 6 sufficiently reflects the actual applied load and the vertical displacement. For example, if the reproducibility is good even if the linearity of the vertical load with respect to the horizontal load and the vertical load with respect to the vertical displacement is poor, the actual load and the vertical displacement can be calculated based on the characteristic data measured in advance. .

Further, the reduction gear type wedge-shaped jack device having a load detection function and the reaction force introducing device of the present invention are not limited in their use only for simply lifting and lifting heavy structures such as bridges. It can be used as a substitute in the field of hydraulic press as an application range.For example, if it is used for a press that requires aging molding of a high molecular weight material, etc. One problem that has hindered the spread of high molecular weight materials can be solved. Further, it can be used in an ironworks to adjust the pressing force of a continuous casting roller.

[0034]

According to the reduction gear type wedge-shaped jack device having a load detecting function and the reaction force introducing device of the present invention as described above, an expensive hydraulic cylinder jack which was conventionally essential as a pushing / pulling means for a wedge-shaped driving member is conventionally provided. Alternatively, instead of using a hydraulic jack such as a hydraulic center hole jack, a mechanical structure in which the screw shaft portion of the reduction gear unit and the drive shaft and the screw hole portion inside the wedge-shaped drive member are screwed as a push-pull means instead. Accordingly, the entire apparatus can be configured at low cost, and further reduction in size and weight can be achieved. In addition, it is maintenance-free, and is particularly excellent in handling, workability, and safety. In other words, since the reduction gear unit does not require a stroke like a hydraulic jack and does not involve high-precision machining, it can be made much smaller and lighter than a hydraulic jack, and the price of the entire device is greatly reduced. It is possible to reduce the size, size and weight. Also, after lifting and supporting heavy structures,
Since it is not necessary to particularly provide a stopper means for preventing lifting, the structure is simplified. Furthermore, the load cell incorporated in the jack device allows the actual load applied to the heavy structure or the reaction force acting thereon to be accurately monitored in real time, so that the work process management becomes easy, and a plurality of jack devices can be used. The effect is enormous when working simultaneously with coordination.

In particular, accidents caused by the use of hydraulic jacks at bridge construction and repair work sites are not endless, but the present invention can completely change the situation. It seems to contribute greatly. In addition, the present invention not only repairs and replaces the bearing device, but also greatly contributes to the civil engineering and construction fields as well as to the industry.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a typical embodiment of a reduction gear type wedge-shaped jack device having a load detection function according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is an overall perspective view showing a reduction gear type wedge-shaped jack device with a load detection function according to the present invention, which is similar to an actual machine.

FIG. 4 is an overall perspective view of another embodiment.

FIG. 5 is an exploded perspective view showing a typical use mode of a reduction gear type wedge-shaped jack device having a load detection function according to the present invention.

FIG. 6 is a side view showing another embodiment with a partial cutaway.

FIG. 7 is a plan view of the same.

FIGS. 8A and 8B show results of a first test in a performance test of a reduction gear type reaction force introducing device with a load detection function according to the present invention, wherein FIG. 8A is a graph of a vertical load with respect to a horizontal load, and FIG. It is a graph of.

FIG. 9 also shows the results of the second performance test.
(A) is a graph of a vertical load with respect to a horizontal load, and (b) is a graph of a vertical load with respect to a vertical displacement.

FIG. 10 shows the results of the third time in the performance test, where (a) is a graph of vertical load versus horizontal load,
(B) is a graph of vertical load with respect to vertical displacement.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Jack main body 2 Reduction gear unit 3 Case 4 Wedge-shaped drive member 5 Wedge-shaped pressure-receiving member 6 Load cell 7 Inclined surface 8 Horizontal surface 9 Inclined surface 10 Mounting surface 11 High rotation axis 12 Low rotation axis 13 Drive shaft 14 Screw shaft section 15 Screw part 16 Rotation drive means 17 Block body 18 Thin end part 19 Insertion hole 20 Placement plate 21 Operation handle 22 Base plate 23 Guide side wall 24 Vertical receiving plate 25 Rear wall 26 Shaft hole 27 Thick end part 28 Projection 29 Depression Reference Signs List 30 concave groove part 31 step part 32 thick end part 33 main body part 34 pressurizing part 35 connector 36 cable 37 handle 38 bridge girder 39 substrate 40 measuring instrument

Claims (7)

[Claims] 1. A wedge-shaped driving member having an inclined surface formed on an upper surface, and a wedge-shaped member having an inclined surface formed at the same inclination angle slidingly contacting the inclined surface of the wedge-shaped driving member on a lower surface, and having a horizontal mounting surface formed on an upper surface. The pressure receiving member and the inclined surfaces are brought into contact with each other to be stacked and accommodated in the housing, and a reduction gear unit having a high rotation speed axis and a low rotation speed axis is fixed to the outside of the vertical receiving plate of the housing, and the low pressure receiving member is fixed. A screw hole portion provided inside the drive shaft, which is inserted into the wedge-shaped drive member from the thin end side along the direction of movement of the wedge-shaped drive member and extends inside the vertical support plate and extends through the rotation speed axis. While screwing into, the single or multiple load cells are interposed between the thick end surface of the wedge-shaped pressure receiving member and the inner surface of the vertical receiving plate, and the high rotation speed axis is rotated by rotation driving means, The wedge-shaped pressure receiving member is lowered and raised by pushing and pulling the wedge-shaped driving member. In addition, when the wedge-shaped drive member is pulled toward the vertical receiving plate side, the load cell detects a horizontal load in the vertical receiving plate direction of the wedge-shaped pressure receiving member due to a vertical load of a heavy object applied to the mounting surface. A reduction gear type wedge-shaped jack device with a load detection function, characterized by the following. 2. A high-speed shaft of the reduction gear unit is exposed to the outside, and a drive shaft extending to the low-speed shaft is moved from one end along the moving direction of the wedge-shaped drive member to the vertical receiving plate. A screw shaft portion that penetrates and is inserted into the housing and formed on the drive shaft is screwed into a screw hole portion of a block body embedded in the wedge-shaped drive member, and the two load cells are connected to the thick end surface of the wedge-shaped pressure receiving member. The reduction gear-type wedge-shaped jack device with a load detection function according to claim 1, wherein the reduction gear type wedge-shaped jack device is fixed at a symmetrical position across the drive shaft. 3. The reduction gear-type wedge jack device with a load detection function according to claim 1, wherein the rotation driving means is an operation handle or an electric rotary tool detachably connected to a high rotation speed shaft. 4. A wedge-shaped drive member having an inclined surface formed on an upper surface on a base plate fixed to a substructure, and an inclined surface having the same inclined angle slidably contacting the inclined surface of the wedge-shaped drive member is formed on a lower surface. And a wedge-shaped pressure-receiving member having a horizontal mounting surface,
While the two inclined surfaces are in contact with each other and stacked, a plate-shaped shoe is placed on the mounting surface of the wedge-shaped pressure receiving member, and a reduction gear unit having a high rotation speed axis and a low rotation speed axis is mounted on the base plate. A thin end is fixed to the outside of a vertical receiving plate fixed to one end, extends along a low rotational speed axis, and has a screw shaft portion of a drive shaft penetrating the vertical receiving plate along a moving direction of the wedge-shaped driving member. Inserted into the inside from the side and screwed into the threaded hole provided therein, one or more load cells are interposed between the thick end surface of the wedge-shaped pressure receiving member and the inner surface of the vertical receiving plate, The rotation shaft is rotated by rotation drive means to draw the wedge-shaped drive member toward the vertical receiving plate side, raise the upper wedge-shaped pressure receiving member with respect to the substructure, and use the plate-shaped shoe to bridge a heavy structure such as a bridge. The wedge-shaped pressure receiving member is lifted and supported by the vertical load of the heavy object applied to the placing surface. By comprising detecting the horizontal load to the straight receiving plate direction by the load cell load detection function reduction gear type reaction force introduction device according to claim. 5. A high-speed axis of the reduction gear unit is exposed to the outside, and a drive shaft extending on the low-speed axis is connected to the vertical receiving plate from one end along a moving direction of the wedge-shaped drive member. A screw shaft portion that penetrates and is inserted into the housing and formed on the drive shaft is screwed into a screw hole portion of a block body embedded in the wedge-shaped drive member, and the two load cells are connected to the thick end surface of the wedge-shaped pressure receiving member. 5. The reduction gear type reaction force introducing device with a load detection function according to claim 4, wherein the reduction gear type reaction force introducing device is fixed at a symmetrical position across the drive shaft. 6. The reduction gear type reaction force introducing device with a load detection function according to claim 4, wherein the rotation driving means is an operation handle or an electric rotating tool detachably connected to a high rotation speed shaft. 7. The shoe according to claim 4, wherein the plate-like shoe is a single piece of hard rubber or a laminate of a metal plate and hard rubber.
A reduction gear type reaction force introducing device with a load detection function as described.