JP2001193014A - Structure support apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure support apparatus which is good in reproducibility of a lifted load with respect to a given driving force, and can stably lift an upper structure to an accurate location with respect to a lower structure over a long period of time. SOLUTION: The support apparatus 21 is constructed such that an upper pressure receiving member 22 and a lower pressure receiving member 23 are relatively moved while being superposed on each other, whereby the thickness in a superposed direction between the upper pressure receiving member 22 and the lower pressure receiving member 23 is changed. In this support apparatus 21, either a lower surface 31 of the upper pressure receiving member 22 or an upper surface 36 of the lower pressure receiving member 23 is formed of a lead-fluorine synthetic resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for supporting a structure, and more particularly, to a structure including an upper structure and a lower structure for supporting the upper structure, such as a bridge or an expressway. The present invention relates to a support device interposed between an upper structure and a lower structure.

[0002]

2. Description of the Related Art As shown in FIG. 1, for example, a structure such as a bridge or a highway, which is composed of an upper structure 1 and a lower structure 2 for supporting the upper structure 1, is provided. In order to reliably transmit the vertical load of the upper structure 1 to the lower structure 2, or to absorb expansion and contraction and horizontal vibration caused by a temperature change of the upper structure 1,
A support member 3 is interposed between the support structure 2 and the lower structure 2.

Since such a bearing member 3 is fatigued by long-term use, it is necessary to replace the bearing member 3 with a new bearing member after a certain period of time. For example, Japanese Unexamined Patent Publication No. Hei 7-166514 discloses a method. Described, and
A supporting device as shown in FIGS. 10 to 12 has been proposed.

As shown in FIG. 10, this support device has an upper pressure receiving member 5 having a lower sliding surface 4 having an inclined surface on its lower surface, and an upper pressure receiving member 5 which is superposed on the upper pressure receiving member 5 and has an upper surface on its upper surface. Lower pressure receiving member 7 having upper sliding surface 6 formed of an inclined surface slidable with respect to lower sliding surface 4 of pressure receiving member 5
Base member 12 that slidably receives lower pressure receiving member 7
And a hydraulic jack device 8 for moving the lower pressure receiving member 7 by pulling it.
Then, when the upper pressure receiving member 5 and the lower pressure receiving member 7 are displaced from each other in the moving direction of the lower pressure receiving member 7, the upper structure 1 and the lower structure 2
And between them. At this time, a shoe 11 is interposed between the upper structure 1 and the upper pressure receiving member 5. Further, the upper pressure receiving member 5 is provided with a projection 9 projecting from the lower surface, and the projection 9 is superposed so as to be inserted into a groove 10 formed in the upper pressure receiving member 5. Further, a reaction force receiving member 13 is interposed between the upper pressure receiving member 5 and the hydraulic jack device 8.

Next, as shown in FIG. 11, when the hydraulic jack device 8 is driven to pull the lower pressure receiving member 7 toward the hydraulic jack device 8, the upper pressure receiving member 5 is pushed by the lower pressure receiving member 7. Does not move because it is received by the reaction force receiving member 13, so that only the lower pressure receiving member 7 moves between the upper sliding surface 6 and the lower sliding surface 4.
And it moves while sliding between the bottom surface of the lower pressure receiving member 7 and the upper surface of the base member 12. As a result, the thickness of the upper pressure receiving member 5 and the lower pressure receiving member 7 in the overlapping direction gradually increases, and as a result, this support device supports the upper structure 1 with respect to the lower structure 2. While lifting.

Then, as shown in FIG. 12, after raising the upper structure 1 to an appropriate position with respect to the lower structure 2, the stopper member 14 is inserted into the space in the groove 10 in which the projection 9 is received. Into the upper pressure receiving member 5.
And the lower pressure receiving member 7 and the relative movement thereof are regulated.
The upper structure 1 is supported at an appropriate position with respect to the lower structure 2.

If such a supporting device is used, the upper structure 1 can be lifted while supporting the upper structure 1 with respect to the lower structure 2, and can be used as the supporting member 3 as it is. There is an advantage that the bearing member 3 can be easily replaced even when there is no working space for removing the member 3.

[0008]

However, in this type of supporting device, since the upper structure 1 needs to be lifted to an accurate position with respect to the lower structure 2, the lower pressure receiving member 7 is required.
Need to be moved accurately. Therefore, conventionally,
Lubricating oil such as grease is applied to a portion where the lower pressure receiving member 7 slides, that is, the upper sliding surface 6 or the lower sliding surface 4 and the bottom surface of the lower pressure receiving member 7 or the upper surface of the base member 12. The smooth movement of the pressure receiving member 7 is ensured.

However, it is not possible to stably move the lower pressure receiving member 7 over a long period of time only by applying lubricating oil to a portion where the lower pressure receiving member 7 slides. That is, in the lubricating oil, its fluidity changes with time due to environmental conditions such as temperature, or deterioration of the lubricating oil itself, so that the friction coefficient of the sliding portion of the lower pressure receiving member 7 changes with time. For example, even if the same driving force is applied by the hydraulic jack device 8, the movement (slip) state of the lower pressure receiving member 7 is changed due to the difference in the friction coefficient, and the applied force is given. There is a problem that the launching load of the upper structure 1 is different each time the driving force is changed.

The present invention has been made in view of the above-described problems, and has as its object to improve the reproducibility of a launching load for a given driving force, and to provide a long-term
An object of the present invention is to provide a structure supporting device capable of stably lifting an upper structure to an accurate position with respect to a lower structure.

[0011]

In order to achieve the above-mentioned object, according to the first aspect of the present invention, a first pressure receiving member having a first sliding surface formed of an inclined surface is overlapped with the first pressure receiving member. A second pressure receiving member having a second sliding surface formed of an inclined surface slidable with respect to the first sliding surface of the first pressure receiving member, and at least one of the first pressure receiving member and the second pressure receiving member. A driving unit for moving one of the first pressure receiving member and the second pressure receiving unit while the first sliding surface and the second sliding surface slide with each other by the driving of the driving unit. In the structure supporting device configured to be able to change the thickness of the first pressure receiving member and the second pressure receiving member in the overlapping direction by relatively moving the member, the first sliding is performed. One of the surface and the second sliding surface is lead-fluorine It is characterized in that it is formed of a synthetic resin.

According to such a configuration, when a driving force is given by the driving means, the first pressure receiving member and the second pressure receiving member slide the first sliding surface and the second sliding surface with each other. The relative movement changes the thickness of the first pressure receiving member and the second pressure receiving member in the overlapping direction. At this time, if one of the first sliding surface and the second sliding surface is formed of a lead-fluorine-based synthetic resin, the frictional resistance between the first sliding surface and the second sliding surface is increased. Is always constant,
The first pressure receiving member and the second pressure receiving member are relatively moved with respect to a given driving force with good reproducibility. for that reason,
For example, when an attempt is made to ensure smooth movement by applying lubricating oil or the like to the first sliding surface and the second sliding surface, environmental conditions such as temperature, or deterioration of the lubricating oil itself, etc. As a result, the frictional resistance between the first sliding surface and the second sliding surface changes with time, and for a given driving force,
Each time, the launching load may be different, but without such a problem, the upper structure can be stably lifted with respect to the lower structure to an accurate position for a long period of time.

The invention described in claim 2 is the first invention.
The Vickers hardness of the first sliding surface or the second sliding surface not formed of a lead-fluorine-based synthetic resin is 450 or more.

According to such a configuration, one of the first sliding surface and the second sliding surface is formed of a lead-fluorine-based synthetic resin, and the other has a Vickers hardness of
Since it is 450 or more, the frictional resistance between the first sliding surface and the second sliding surface can be made more constant, and therefore,
The first pressure receiving member and the second pressure receiving member can be relatively moved with high reproducibility with respect to the applied driving force.
Therefore, it is possible to stably lift the upper structure with respect to the lower structure to an accurate position over a long period of time.

[0015] The invention described in claim 3 is based on claim 1.
Or the second sliding surface or the second sliding surface not formed of a lead-fluorine-based synthetic resin.
The sliding surface is formed by nickel-phosphorus plating.

According to such a configuration, one of the first sliding surface and the second sliding surface is formed of a lead-fluorine-based synthetic resin, and the other is formed of nickel-phosphorus plating. Therefore, the frictional resistance between the first sliding surface and the second sliding surface can be made more constant, and the smoothness of the sliding portion can be improved. Therefore, the first pressure receiving member and the second pressure receiving member can be relatively smoothly moved with a given driving force with good reproducibility. Therefore, over the long term,
More stably, the upper structure can be lifted to an accurate position with respect to the lower structure.

The invention described in claim 4 is the first invention.
In the invention described in any one of the above (1) to (3), the second pressure receiving member has a third sliding surface that is a back surface with respect to the second sliding surface, and receives the second pressure receiving member. A base member having a fourth sliding surface slidable with respect to the third sliding surface of the pressure receiving member is further provided, and the third sliding surface and the fourth sliding surface are moved by driving the driving means. The third sliding surface and the fourth sliding surface are made of a lead-fluorine-based synthetic resin.

According to such a configuration, when a driving force is given by the driving means, the first pressure receiving member and the second pressure receiving member slide the first sliding surface and the second sliding surface against each other. , The third sliding surface of the second pressure receiving member and the fourth sliding surface of the base member slide relative to each other, so that the thickness of the first pressure receiving member and the second pressure receiving member in the overlapping direction is increased. Changes. One of the first sliding surface and the second sliding surface is made of a lead-fluorine-based synthetic resin, and one of the third sliding surface and the fourth sliding surface is made of lead-free. Since the frictional resistance between the first sliding surface and the second sliding surface, and between the third sliding surface and the fourth sliding surface is always constant when formed of a fluorine-based synthetic resin, The first pressure receiving member and the second pressure receiving member are relatively moved with respect to the applied driving force with good reproducibility. Therefore, it is possible to stably lift the upper structure with respect to the lower structure to an accurate position for a long time.

The invention described in claim 5 is the same as the invention in claim 4.
The Vickers hardness of the third sliding surface or the fourth sliding surface not formed of a lead-fluorine-based synthetic resin is 450 or more.

According to such a configuration, one of the third sliding surface and the fourth sliding surface is formed of a lead-fluorine synthetic resin, and the other has a Vickers hardness of
Since it is 450 or more, the frictional resistance between the third sliding surface and the fourth sliding surface can be made more constant, and therefore,
The first pressure receiving member and the second pressure receiving member can be relatively moved with high reproducibility with respect to the applied driving force.
Therefore, it is possible to stably lift the upper structure with respect to the lower structure to an accurate position over a long period of time.

The invention described in claim 6 is the same as the invention in claim 4.
Or the third sliding surface or the fourth sliding surface not formed of a lead-fluorine-based synthetic resin.
The sliding surface is formed by nickel-phosphorus plating.

According to this structure, one of the third sliding surface and the fourth sliding surface is formed of a lead-fluorine-based synthetic resin, and the other is formed of nickel-phosphorus plating. Therefore, the frictional resistance between the third sliding surface and the fourth sliding surface can be made more constant, and the smoothness of the sliding portion can be improved. Therefore, the first pressure receiving member and the second pressure receiving member can be relatively smoothly moved with a given driving force with good reproducibility. Therefore, over the long term,
More stably, the upper structure can be lifted to an accurate position with respect to the lower structure.

[0023]

FIG. 2 is an exploded perspective view showing an embodiment of a structure supporting apparatus according to the present invention. In FIG. 2, this support device 21 is, for example, as shown in FIG. 1, a structure such as a bridge or a highway, which comprises an upper structure 1 and a lower structure 2 for supporting the upper structure 1. In this embodiment, the support member 3 interposed between the upper structure 1 and the lower structure 2 is used for replacement or the like, and can be used as the support member 3 as it is.

In FIG. 2, the supporting device 21
An upper pressure receiving member 22 as a pressure receiving member, a lower pressure receiving member 23 as a second pressure receiving member, a driving device 24 as driving means for moving the lower pressure receiving member 23, and a base member 26 for receiving the lower pressure receiving member 23; Further, it comprises a shoe 25 and a reaction force receiving member 27.

The upper pressure receiving member 22 has a rectangular shape in plan view, the upper surface 28 is horizontal, and the lower surface 31 is a front side surface 29.
Is formed in a substantially wedge-shaped plate shape in a side view as an inclined surface inclined along the length direction of the rear side surface 30 so as to be thicker than the rear side surface 30. In addition, the lower surface 31 formed of the inclined surface functions as a first sliding surface.
The upper pressure receiving member 22 has a direction orthogonal to the length direction,
That is, at the center in the width direction, a U-shaped groove 32 that opens downward over the entire length in the length direction is formed. The groove portion 32 is formed such that the upper surface 40 of the groove portion 32 and the upper surface 28 of the upper pressure receiving member 22 are parallel to each other, and the space between the upper surface 40 and the upper surface 28 of the upper pressure receiving member 22 is the same over its entire length. I have. The upper surface 28 of the upper pressure receiving member 22 is formed with a rectangular recess 33 in a plan view for fitting the shoe 25 therein.

The upper pressure receiving member 22 is formed of a lightweight and hard aluminum alloy, and the entire surface thereof has a sliding member and a meshing member in a driving device 24 to be described later so that the Vickers hardness is 450 or more. Nickel-phosphorus plating similar to that performed on members is performed. Further, the two pressure receiving members 22 on both sides of the upper pressure receiving member 22 that sandwich the groove 32 are formed.
The lower pressure receiving member 2 to be described later is
Upper contact surface 4 for slidably contacting the upper surface 36 of 3
6 are formed. The upper contact surface 46 is formed by attaching two substantially rectangular sheets made of a lead-fluorine-based synthetic resin. The sheet made of the lead-fluorine-based synthetic resin is made of, for example, a polytetrafluoroethylene resin containing lead, and is commercially available under the trade name "DU (B) slide plate" (Daido Metal Industry Co., Ltd.). Can be used. A U-shaped receiving plate 34 made of a steel material and receiving the reaction force receiving member 27 is fitted into the front side surface 29 such that the front side surface 29 is flush with the front side surface 29.

The lower pressure receiving member 23 has a rectangular shape in a plan view, the lower surface 35 is horizontal, and the upper surface 36 is a rear side surface 37.
Is formed in a substantially wedge-shaped plate shape in a side view as an inclined surface that is inclined along the length direction of the front side surface 38 so as to be thicker than the front side surface 38. In addition, the upper surface 36 formed of the inclined surface functions as a second sliding surface.
The angle at which the upper surface 36 inclines is substantially the same as the angle at which the lower surface 31 of the upper pressure receiving member 22 inclines. Further, the lower surface 36 formed of a horizontal plane functions as a third sliding surface.

The lower pressure receiving member 23 is integrally formed with a ridge 39 projecting upward over the entire length thereof in a direction perpendicular to the length direction, that is, in a central portion in the width direction. . The ridge 39 has a rectangular cross section that can be inserted into the groove 32 of the upper pressure-receiving member 22, and has an upper surface 41 of the ridge 39 (in FIG. 2, an upper surface 36 of the lower pressure-receiving member 23 and an upper surface 41 of the ridge 39). Are formed in parallel with the lower surface 35 of the lower pressure receiving member 23, and the height from the lower surface 35 to the upper surface 41 is the same over its entire length. . Further, a rectangular cylindrical fitting hole 43 for fitting a locking member 42 of the driving device 24 to be described later is formed in the middle of the protrusion 39 in the length direction so as to open the upper surface 41 thereof. In addition, a feed screw 44 as an output shaft of the driving device 24 to be described later is provided between the center portion of the front side surface 38 of the protrusion 39 and the fitting hole 43 along the length direction of the protrusion 39. An insertion hole 45 for insertion is formed.

The lower pressure-receiving member 23 is made of a lightweight and hard aluminum alloy, and has a sliding surface and a meshing member in a driving device 24, which will be described later, so that the entire surface thereof has Vickers hardness of 450 or more. Nickel-phosphorus plating similar to that performed on members is performed. A lower contact surface 84 for slidably contacting an upper surface 48 of the base member 26 described below is formed on the substantially rectangular lower surface 35 of the lower pressure receiving member 22. Like the upper contact surface 46, the lower contact surface 84 is formed by attaching a substantially rectangular sheet made of a lead-fluorine-based synthetic resin.

The shoe 25 is made of a hard rubber material and has a rectangular plate shape in a plan view that can be fitted into a recess 33 formed on the upper surface 28 of the upper pressure receiving member 22. In addition, shoes 2
A receiving plate 47 made of a steel material and receiving the upper structure 1 is fitted on the upper surface of the fifth member 5.

As shown in FIG. 3, the driving device 24 includes a driving shaft 52 as an input shaft to which power from a driving source is input.
A locking member 42 fitted in a fitting hole 43 formed in the projection 39 of the lower pressure receiving member 23;
A feed screw 44 as an output shaft screwed into the gearbox 50, and a gear provided inside the gear box 50 for receiving the power input from the drive shaft 52 and transmitting the power to the feed screw 44 at a predetermined rotation ratio. And a reduction gear mechanism 53 as a transmission mechanism. The locking member 42 has a prismatic shape that can be fitted into the fitting hole 43, and has a screw hole 54 that penetrates from the center of the front surface in the thickness direction. The locking member 42 is made of a steel material, and its surface is coated with a fluorine-based material.

The gear box 50 is a rectangular box made of a steel material, and as shown in FIG.
A central portion of the drive shaft 3 is opened for inserting the drive shaft 52, and a ring-shaped drive shaft support member 55 having a front insertion hole 58 for inserting and supporting the drive shaft 52 is provided in this opening. Have been. A rear insertion hole 57 for inserting the feed screw 44 is also formed in the center of the rear wall 56 of the gear box 50. The center of the front insertion hole 58 of the drive shaft support member 55 and the center of the rear insertion hole 57 of the rear wall 56 are formed so as to be arranged on the same axis. The gear box 50 is mounted on the front wall 7.
It is supported by four stay bolts 78 and 79 (only two appear in FIG. 3) connecting the rear wall 3 to the rear wall 56.

Then, as shown in FIG.
Is inserted into the fitting hole 43, one end of the feed screw 44 is screwed into the screw hole 54 of the locking member 42, and the other end is inserted into the rear insertion hole 57. And the rear wall 5 of the gear box 50 via the bearing metal 59
6 rotatably supported. On the other hand, the drive shaft 52 has a handwheel 60 detachably attached to one end thereof and a drive shaft support member 55 via a bearing metal 61 with the other end inserted through the front insertion hole 58. It is supported rotatably. The tip of the drive shaft 52 having a smaller diameter than the feed screw 44 is
Is rotatably received via a bearing metal 82 in a concave portion formed at the front end portion. Thereby, the drive shaft 5
The 2 and the feed screw 44 are arranged on the same axis. In addition. This axis is indicated by reference numeral 66 in FIG.

The reduction gear mechanism 53 includes the input side gear 6.
3. It comprises an output gear 62 and two intermediate gear elements 64 and 65. The input-side gear 63 is attached to the distal end of the drive shaft 52 inserted through the front-side insertion hole 58 such that the axis of the drive shaft 52 becomes the center of rotation.
2 and provided integrally. Also, the output side gear 62
Is spline-coupled to the distal end of the feed screw 44 inserted through the rear insertion hole 57 such that the axis of the feed screw 44 becomes the center of rotation. Two intermediate gear elements 6
4 and 65 are disposed parallel to the axis 66 at positions displaced from each other by 180 ° with respect to the axis 66 on which the drive shaft 52 and the feed screw 44 are disposed, that is, around the axis 66. It comprises two gear shafts 67 and 68 arranged in parallel, and first intermediate gears 69 and 70 and second intermediate gears 71 and 72 formed on these two gear shafts 67 and 68, respectively.

The two gear shafts 67 and 68 are rotatably supported on the front wall 73 and the rear wall 56 of the gear box 50 via bearing metals 74, 75, 76 and 77, respectively. Each of the first intermediate gears 69 and 70 is engaged with the input side gear 63 at one end of each of the gear shafts 67 and 68 in a state where the axis of the gear shafts 67 and 68 is the center of rotation. Each gear shaft 67
And 68 are provided integrally. In addition, each second
The intermediate gears 71 and 72 are adjacent to the first intermediate gears 69 and 70 in the axial direction of the respective gear shafts 67 and 68, and the output side gears are arranged such that the axes of the gear shafts 67 and 68 become the center of rotation. The gear shafts 67 and 68 are provided integrally with each other so as to mesh with the gear shaft 62. As a result, the first intermediate gears 69 and 70 and the second intermediate gears 71 and 72 are arranged in the gear box 50 in a state where they are not rotatable relative to each other on the same axis.

The sliding member and the meshing member in the driving device 24, that is, the driving shaft 52 in which the output gear 63, the feed screw 44, and the input gear 63 are integrally formed,
Gear shafts 67 and 68 in which the first intermediate gears 69 and 70 and the second intermediate gears 71 and 72 are integrally formed include:
Nickel-phosphorus plating is applied.

This nickel-phosphorous plating is, for example,
After immersing each member to be plated in a plating solution containing nickel and phosphorus and forming a plating layer having a thickness of 2 to 100 μm, preferably 5 to 50 μm on the surface of each member by electroless plating, , If necessary, 300-1000
C., preferably 300 to 400.degree. C. for 1 to 3 hours. By performing such nickel-phosphorus plating, it is possible to reduce the variation in the coefficient of friction between the members. Therefore, the driving force input from the driving shaft 52 can be efficiently transmitted to the feed screw 44.
Can be transmitted to Therefore, the input driving force can be output with a more accurate rotation ratio and more reliably. The content of phosphorus in the electroless plating film thus applied is preferably, for example, 1 to 15% by weight.

In such nickel / phosphorus plating, a plating solution containing nickel / phosphorus is further added with polytetrafluoroethylene, tetrafluoroethylene / hexafluoropropylene copolymer, tetrafluoroethylene / perfluoro Fluorinated components such as fluorinated resin particles such as alkyl vinyl ether copolymers and fluorinated graphite particles are blended, and the surface of each member is
An electroless plating film is formed in which a fluorine-based component is eutectoidally dispersed in a matrix composed of a nickel-phosphorus plating film. By such a co-deposition of the fluorine component, the friction resistance, sliding resistance, and silence between the members can be improved. The eutectoid content of the fluorine component in such an electroless plating film is preferably 1 to 40% by weight, more preferably 2 to 10% by weight, based on the entire film. In such a plating treatment, quenching and tempering may be performed as necessary, and the hardness of the electroless plating film is set to be 450 or more in Vickers hardness.

As shown in FIG. 2, the base member 26 has a rectangular plate shape in a plan view so that the upper surface 48 can slidably receive the lower surface 35 of the lower pressure receiving member 23. . The upper surface 48 functions as a fourth sliding surface.

On the upper surface 48 of the base member 26, a guide portion 49 for projecting the lower pressure receiving member 23 only in the longitudinal direction of the lower pressure receiving member 23 is provided. The guide portion 49 is composed of a pair of ridge members extending in parallel with the length direction of the base member 26, and each is disposed at a position corresponding to both widthwise ends of the lower pressure receiving member 23. The base member 26 is formed of a steel material, and the entire surface thereof is plated with nickel and phosphorus as described above so that the Vickers hardness is 450 or more.

The reaction force receiving member 27 receives the upper pressure receiving member 22 drawn toward the driving device 24 by the driving of the driving device 24, and applies a reaction force to the upper pressure receiving member 22, thereby causing the upper pressure receiving member 22 and the lower pressure receiving member 22 to react with each other. This is for enabling sliding with the member 23, and in a plan view so as to be interposed between the receiving plate 34 provided on the front side surface 29 of the upper pressure receiving member 22 and the gear box 50 of the driving device 24. It has a rectangular plate shape, has an insertion hole 80 formed in the center, and a step 51 that can be engaged with the end of the base member 26 is formed in the lower end of the rear side surface. I have. The reaction force receiving member 27 is made of a steel material, and its surface is coated with a fluorine-based material.

Next, a description will be given of a method of using the support device 21 of the present embodiment thus configured with reference to FIGS.

FIG. 4 shows a state in which the support device 21 is set between the upper structure 1 and the lower structure 2. The setting of the support device 21 is performed as follows. That is, first, the base member 26 is fixed to the lower structure portion 2 using, for example, a bolt. At this time, if the base member 26 is not horizontal, the base member 26 is fixed in a horizontal state by appropriately interposing a plate material or the like. Next, the lower pressure receiving member 23 is placed in the guide portion 49 on the upper surface 48 of the base member 26. Thereby, the lower surface 35 of the lower pressure receiving member 22 and the base member 26
Are slidably in contact with each other. Note that before and after the lower pressure receiving member 23 is placed, the locking member 4
2 is fitted into a fitting hole 43 formed in the ridge 39 of the lower pressure receiving member 23, and one end of the feed screw 44 is inserted into an insertion hole 80 of the reaction force receiving member 27, and then the lower pressure receiving member It is inserted into the insertion hole 45 formed in the 23 ridge 39 and screwed into the screw hole 54 of the locking member 42. As a result, the driving device 24 is attached to the lower pressure receiving member 23. The lower pressure receiving member 23 is provided with the upper pressure receiving member 22 and the groove 32 of the upper pressure receiving member 22 is provided with the lower pressure receiving member 2.
3 so as to be inserted into the ridges 39 of the third embodiment. By the fitting of the groove 32 and the ridge 39, the upper pressure receiving member 22 can slide with respect to the lower pressure receiving member 23 only in the length direction in which the ridge 39 extends. The lower surface 31 of the pressure receiving member 22 and the upper surface 36 of the lower pressure receiving member 23 slidably contact each other. The recess 3 formed on the upper surface 28 of the upper pressure receiving member 22
The setting of the support device 21 is completed by fitting the shoe 25 into the position 3. A series of operations in this set may be set at once regardless of the procedure, for example, in a state where all of them are assembled in advance. Further, in the set state, there is a slight gap between the upper structure 1 and the shoe 25, or the upper structure 1 and the shoe 25 come into contact with each other without being pressed against each other.
The upper pressure receiving member 22 and the lower pressure receiving member 23 are shifted from each other in the sliding direction and overlap each other.

Next, the handwheel 60 is attached to the drive shaft 52.
The handwheel 60 is rotated clockwise (in the direction of arrow 81) by, for example, human power as a drive source. Then, the driving force input from the driving shaft 52 is transmitted to the two intermediate gear elements 64 and 65 via the input gear 63. In each of the intermediate gear elements 64 and 65, the driving force is transmitted from the first intermediate gears 69 and 70 to the second intermediate gears 71 and 72, and thereafter, the output gear 62 is transmitted from the intermediate gear elements 64 and 65. The driving force is transmitted to the feed screw 44 via the.

When the power is transmitted to the feed screw 44 at a predetermined rotation ratio via the drive shaft 52 and the reduction gear mechanism 53 by the rotation of the handwheel 60, the screw is screwed to the feed screw 44. Because the locking member 42 advances,
The lower pressure receiving member 23 moves so that the lower surface 35 slides on the upper surface 48 of the base member 26 and is drawn toward the driving device 24. When the lower pressure receiving member 23 moves,
The upper pressure receiving member 22 is pushed by the lower pressure receiving member 23, but cannot be moved because it is received by the reaction force receiving member 27. As a result, the lower surface 3 of the upper pressure receiving member 22
The upper pressure receiving member 22 and the lower pressure receiving member 23 move relative to each other while the 1 and the upper surface 36 of the lower pressure receiving member 23 slide with each other. When such a relative movement starts, the thickness of the upper pressure receiving member 22 and the lower pressure receiving member 23 in the overlapping direction gradually increases, so that the support device 21 is moved relative to the lower structure 2. The upper structure 1 is lifted while supporting it. In this way, as shown in FIG. 5, after the upper structure 1 is raised to an appropriate position with respect to the lower structure 2, if the rotation of the handwheel 60 is stopped, the upper pressure receiving member 22 and the lower pressure receiving member The upper structure 1 is supported at an appropriate position with respect to the lower structure 2.

The upper structure 1 is connected to the lower structure 2.
After supporting at an appropriate position, if necessary, the handwheel 60 is removed, for example, as shown in FIG.
A rotation restricting member 83 for restricting rotation of the drive shaft 52 may be attached to the drive shaft 52.

Therefore, if such a supporting device 21 is used, the upper structure 1 can be lifted while supporting the lower structure 2 and can be used as the bearing member 3 as it is. Existing bearing member 3
The bearing member 3 can be easily replaced even when there is no work space for removing the support member 3.

Further, in the support device 21, after the power input from one drive shaft 52 is transmitted to the two intermediate gear elements 69 and 70 via the input gear 63,
Since the power is transmitted again to one feed screw 44 via the output gear 62, the input power can be output with an accurate rotation ratio and reliably. Therefore, the lower pressure receiving member 23 can be accurately moved, and the upper structure 1 can be lifted to an accurate position with respect to the lower structure 2. Further, in the driving device 24, the reduction gear mechanism 53
Is adopted, so that the lower pressure receiving member 23 can always be moved accurately, unlike the case where the hydraulic jack device is used, so that the lower pressure receiving member 23 can be always moved accurately.
Furthermore, after the upper structure 1 is raised to an appropriate position with respect to the lower structure 2, it can be used as the support member 3 as it is without assembling a stopper member. Can be improved.

Since the drive shaft 52 and the feed screw 44 are disposed on the same axis 66, the transportability and workability are improved by downsizing the reduction gear mechanism 53. The intermediate gear elements 64 and 65 include a first intermediate gear 69 and 70 and a second intermediate gear 71 and 72
Are arranged so as not to be relatively rotatable on the same axis, and these intermediate gear elements 64 and 65 are arranged in parallel around the axis 66 of the drive shaft 52 and the feed screw 44, so that Efficient power transmission is achieved by miniaturization.

Then, in the support device 21 of the present embodiment,
The lower surface 31 of the upper pressure-receiving member 22 is formed by an upper contact surface 46 made of a lead-fluorine-based synthetic resin, and the upper surface 36 of the lower pressure-receiving member 23 is formed by nickel-phosphorus plating whose Vickers hardness is 450 or more. The lower surface 35 of the lower pressure receiving member 23 is formed by a lower contact surface 84 made of a lead-fluorine-based synthetic resin, and the upper surface 48 of the base member 26 has a Vickers hardness of 450 or more. In the relative movement between the upper pressure receiving member 22 and the lower pressure receiving member 23, the sliding portions thereof, that is, the lower surface 31 of the upper pressure receiving member 22 and the lower pressure receiving member 23
And the lower surface 3 of the lower pressure receiving member 23
5 and the upper surface 48 of the base member 26, the frictional resistance is always constant, and the smoothness of the sliding portion is improved, so that the upper pressure receiving member 22 and the lower pressure receiving member 23 Relative to a given driving force with good smoothness and reproducibility. Therefore, for example, when trying to ensure smooth movement by applying lubricating oil to each sliding part, environmental conditions such as temperature, or
The frictional resistance of each sliding part changes with time due to the deterioration of the lubricating oil itself, and the launch load may differ each time with the applied driving force. In addition, it is possible to obtain an extremely reproducible launch load with respect to a given driving force, and to stably lift the upper structure to an accurate position with respect to the lower structure for a long time.

FIG. 7 shows the relationship between the shaft input torque (torque input from the drive shaft 52) and the launch load (the load that can be lifted by the upper pressure receiving member 22) when the support device 21 of the present embodiment is used. A shaft input torque-launching load characteristic showing the relationship is shown. In FIG. 7, the shaft input torque-launching load characteristic measured 10 days later matches the shaft input torque-launching load characteristic measured on the first day with very good reproducibility. It can be seen that the launch load is always obtained as a constant value with respect to the input torque.

In FIG. 8, the upper contact surface 46 is not formed on the lower surface 31 of the upper pressure receiving member 22, and the lower contact surface 84 is not formed on the lower surface 35 of the lower pressure receiving member 23. The lower surface 31 of the upper pressure receiving member 22 and the lower pressure receiving member 2
3 and between the lower surface 35 of the lower pressure receiving member 23 and the upper surface 48 of the base member 26, the shaft input torque and the launching load when the supporting device 21 coated with lubricating oil is used. , The shaft input torque-launch load characteristic is shown. In FIG. 8, the reproducibility of the shaft input torque-launch load characteristic measured after 10 days is not obtained with respect to the shaft input torque-launch load characteristic measured on the first day. It can be seen that the launch load changes with time with respect to the torque.

FIG. 9 is an upper sectional view showing the internal structure of a driving device 100 according to an embodiment different from the driving device 24 described above.

In FIG. 9, the driving device 100 includes a driving shaft 52 and a locking member 4 similar to the driving device 24 described above.
2 (not shown in FIG. 9), a feed screw 44 is provided, but the structure of the reduction gear mechanism 53 and the gear box 50 that houses the reduction gear mechanism 53 is different from that of the drive device 24 described above.

That is, the gear box 50 is a rectangular box made of a steel material, and a central portion of the front wall 101 is opened to allow the drive shaft 52 to pass therethrough. A ring-shaped drive shaft support member 10 having a front insertion hole 102 for inserting and supporting the drive shaft 52
3 are provided. Also, the rear wall 1 of the gear box 50
A rear insertion hole 105 through which the feed screw 44 is inserted is also formed in the center portion of the front shaft 04, and the center of the front insertion hole 102 of the drive shaft support member 103 and the rear insertion hole 105 of the rear wall 104 are formed. The center is located on the same axis.
The gear box 50 includes a front wall 101 and a rear wall 1.
04, the gear shafts 113, 11 described later.
A holder plate 106 for holding 4, 145 and 146 is disposed in parallel with the front wall 101 and the rear wall 104. The gear box 50 is supported by four stay bolts (not shown).

The feed screw 44 is connected to the rear insertion hole 10.
5 is rotatably supported by the rear wall 104 of the gear box 50 via the bearing metal 107 while being inserted through the bearing metal 107, and the drive shaft 52 is inserted through the bearing metal 108 while being inserted through the front insertion hole 102. Drive shaft support member 10
3 and the front wall 101 rotatably supported. Thereby, the drive shaft 52 and the feed screw 44 are arranged on the same axis. In addition. This axis is indicated by reference numeral 66 in FIG.

The reduction gear mechanism 53 includes an input gear 63 and an output gear 6 similar to the drive unit 24 described above.
2 and two input gear elements 109 and 110, a relay gear element 111, and two output gear elements 142 and 143.

Two input gear elements 109 and 110
Near the drive shaft 52 with respect to an axis 66 where the drive shaft 52 and the feed screw 44 are disposed, and
In the displaced position, two gear shafts 113 and 114 arranged parallel to this axis 66, ie in parallel around the axis 66, and these two gear shafts 1
First intermediate gear 1 formed on each of 13 and 114
15 and 116 and second intermediate gears 117 and 118.

The two gear shafts 113 and 114 are rotatably supported on the front wall 101 and the holder plate 106 of the gear box 50 via bearing metals 119, 120, 121 and 122, respectively. Each first intermediate gear 115 and 116 has a respective gear shaft 113 and 11
4 at one end, the gear shafts 113 and 11
In a state where the axis of 4 becomes the center of rotation, the input side gear 6
3 and are provided integrally with the respective gear shafts 113 and 114. Further, each second intermediate gear 11
The relay gears 7 and 118 are adjacent to the first intermediate gears 115 and 116 in the axial direction of the gear shafts 113 and 114, and the relay gears described below are in a state where the axes of the gear shafts 113 and 114 are the center of rotation. Each gear shaft 113 is engaged with the third intermediate gear 123 of the element 111 so as to mesh therewith.
And 114 are provided integrally. Thereby, the first intermediate gears 115 and 116 and the second intermediate gear 1
17 and 118 are disposed in the gear box 50 in a state where they are provided so as not to be relatively rotatable on the same axis.

The relay gear element 111 includes a relay shaft 141 disposed between the drive shaft 52 and the feed screw 44 on an axis 66 on which the drive shaft 52 and the feed screw 44 are disposed.
An overload prevention mechanism 124 provided around the relay shaft 141, a third intermediate gear 123 provided around the overload prevention mechanism 124, and a fourth intermediate gear 125 formed around the relay shaft 141. Have been.

The relay shaft 141 is rotatably supported on the holder plate 106 of the gear box 50 via a bearing metal 126. The relay shaft 141 is connected to the feed screw 44
One end of the bearing metal 12 is formed in a recess formed at the tip of the feed screw 44.
7 and rotatably abuts the drive shaft 52 via a bearing metal 128 at the other end.

The overload prevention mechanism 124 includes a hub member 129 provided around the drive shaft 52 and the first lining plate 1.
30, a second lining plate 131, and a load setting mechanism 132 for setting a rated load. Hub member 129
A large-diameter cylindrical portion 134 protruding from the flange portion 133 toward the front wall 101, and a large-diameter cylindrical portion 134 further protruding from the large-diameter cylindrical portion 134 toward the front wall 101.
A small-diameter cylindrical portion 135 having a smaller diameter than 34 is formed integrally. This hub member 129 is attached to the relay shaft 141,
The small-diameter cylindrical portion 135 is formed with a concave portion at the tip end thereof. The bearing metal 128 is interposed between the small-diameter cylindrical portion 135 and the drive shaft 52. And the drive shaft 52 holds the hub member 129 via the bearing metal 128. A male screw is formed on the outer peripheral surface of the small-diameter cylindrical portion 135.

The large-diameter cylindrical portion 134 of the hub member 129 has the third intermediate gear 123, the first lining plate 130, and the second
The lining plate 131 is rotatably supported with the third intermediate gear 123 sandwiched between the first lining plate 130 and the second lining plate 131.

The load setting mechanism 132 includes a lining pressing member 136, a disc spring 137, a rotation preventing member 138, and a tightening nut 139. The lining holding member 136 is rotatably supported by the small-diameter cylindrical portion 135 of the hub member 129 in a state of being in contact with the first lining plate 130, and the lining holding member 13
6 to urge the first lining plate 130,
The disc spring 137 is supported by the small-diameter cylindrical portion 135 of the hub member 129 in a state where the disc spring 137 is in contact with the lining pressing member 136. Further, in order to adjust the urging force of the disc spring 137, the tightening nut 139 is capable of pressing the disc spring 137 via the detent member 138, and the hub member 129 is pressed.
Is screwed to the small-diameter cylindrical portion 135.

As a result, when the tightening nut 139 is screwed into the small-diameter cylindrical portion 135 of the hub member 129, the disc spring 137 holds the lining presser between the tightening nut 139 and the flange portion 133 of the hub member 129. By strongly pressing the first lining plate 130, the third intermediate gear 123, and the second lining plate 131 via the member 136,
As a result, the third intermediate gear 123 moves to the first lining plate 13
0 and pressed by the second lining plate 131,
Even when the load on the feed screw 44 side is large, the third lining plate 130 and the third
The intermediate gear 123 does not slip, and the drive shaft 52 and the feed screw 44
Power transmission is not interrupted between
As a result, the rated load is set high.

On the contrary, the tightening nut 139 is connected to the hub member 1.
29, the first lining plate 13 of the disc spring 137 is located between the tightening nut 139 and the flange 133 of the hub member 129.
0, the pressing force on the third intermediate gear 123 and the second lining plate 131 becomes weak, and when the load on the feed screw 44 side is large, the third intermediate gear is applied to the first lining plate 130 and the second lining plate 131. The slip of 123 causes the transmission of power between the drive shaft 52 and the feed screw 44 to be interrupted, thereby setting the rated load low.

The fourth intermediate gear 125 is adjacent to the overload prevention mechanism 124 via the holder plate 106 in the axial direction of the relay shaft 141, and in a state where the axis of the relay shaft 141 becomes the center of rotation, Fifth intermediate gear 147 and 148 of each output gear element 142 and 143 to be described.
Is provided integrally with the relay shaft 141 so as to mesh with the relay shaft 141.

Two output gear elements 142 and 143
Are located near the feed screw 44 with respect to each other across an axis 66 where the drive shaft 52 and the feed screw 44 are disposed.
At the displaced position, it is arranged parallel to this axis 66, that is, it is arranged in parallel around the axis 66.
Gear shafts 145 and 146, and fifth intermediate gears 147 and 148 and sixth intermediate gears 149 and 150 formed on these two gear shafts 145 and 146, respectively.
It is composed of

The two gear shafts 145 and 146 are rotatably supported on the rear wall 104 and the holder plate 106 of the gear box 50 via bearing metals 151, 152, 153 and 154, respectively. Each fifth intermediate gear 147 and 148 is connected to each gear shaft 145 and 14
6, at one end, the gear shafts 145 and 14
Each of the gear shafts 145 and 14 is engaged with the fourth intermediate gear 125 in a state where the axis line 6 is the center of rotation.
6 and is provided integrally. Further, the sixth intermediate gears 149 and 150 are adjacent to the fifth intermediate gears 147 and 148 in the axial direction of the gear shafts 145 and 146, and the state in which the axes of the gear shafts 145 and 146 become the center of rotation. , And are provided integrally with the respective gear shafts 145 and 146 so as to mesh with the output side gear 62. Thereby, the fifth intermediate gears 147 and 1
The 48 and the sixth intermediate gears 149 and 150 are arranged in the gear box 50 in a state where they are provided on the same axis so that they cannot rotate relative to each other.

In order to raise the upper structure 1 to an appropriate position with respect to the lower structure 2 by the driving device 100 configured as described above, the drive shaft 52 is rotated in the same manner as described above. It should be done. Then, the drive shaft 52
First, two powers, which are arranged in parallel around an axis 66 on which the drive shaft 52 and the feed screw 44 are arranged near the drive shaft 52 via the input gear 63, It is transmitted to the input gear elements 109 and 110. In each of the input-side gear elements 109 and 110, the power is transmitted from the first intermediate gears 115 and 116, which are relatively non-rotatably provided on the axes of the gear shafts 113 and 114, to the second intermediate gears 117 and 118. Then, the power is transmitted from the second intermediate gears 117 and 118 of the input side gear elements 109 and 110 to the third intermediate gear 123 of the relay gear element 111.

Next, as described above, when the load transmitted to the third intermediate gear 123 of the relay gear element 111 does not exceed the set load of the overload prevention mechanism 124, the third intermediate gear 123 Is pressed and held by the first lining plate 130 and the second lining plate 131, and the third intermediate gear 123 becomes the hub member 129 and the hub member 1.
29 and the fourth intermediate gear 125 formed integrally with the relay shaft 141, and is transmitted from the third intermediate gear 123 to the fourth intermediate gear 125. This relay gear element 111
Of the drive shaft 52 and the feed screw 44 near the feed screw 44 from the fourth intermediate gear 125
Output gear elements 14 arranged in parallel around
2 and 143 to the fifth intermediate gears 147 and 148.

When the load exceeds the set load of the overload prevention mechanism 124, the third lining plate 130 and the second lining plate 131
The intermediate gear 123 slips, and the power is not transmitted from the third intermediate gear 123 to the fourth intermediate gear 125. Therefore, when a load exceeding the rated load is applied, the transmission path of the reduction gear mechanism 53 is cut off by the overload prevention mechanism 124, so that damage to the apparatus due to overload can be prevented and work safety is ensured. can do.

The power transmitted to the fifth intermediate gears 147 and 148 of the two output gear elements 142 and 143 is relative to each other on the output gear elements 142 and 143 on the axis of each gear shaft 145 and 146. Fifth intermediate gears 147 and 1 provided non-rotatably
48 to the sixth intermediate gears 149 and 150, and thereafter, each output gear element 142 and 1
The power is transmitted from the sixth intermediate gears 149 and 150 of the 43 to the feed screw 44 via the output gear 62.

In the driving device 100 of this embodiment, the power input from one driving shaft 52 is transmitted via the input gear 63 to the two input gear elements 109 and 11.
0, the two output gear elements 1 are again transmitted via the relay gear element 111 having the overload prevention mechanism 124.
42 and 143 and then output gear 62
Is transmitted to one of the feed screws 44, so that the input power can be output at an accurate rotation ratio and reliably, and the speed reduction gear mechanism 53 is further provided than the drive device 24 described above. Since the number of stages is large, a large output load can be output from the feed screw 44 even when the torque of the drive shaft 52 is small. Therefore, for example, as shown by a virtual line in FIG.
The upper structure 1 can be easily and quickly lifted with respect to the lower structure 2 to a precise position by using a tool having a small torque such as 55.

In the drive device 100 of this embodiment, the drive shaft 52, the relay gear element 111, and the feed screw 4
4 are arranged on the same axis 66, and two input gear elements 109 and 110 are connected to the drive shaft 52 and the feed screw 44.
Are arranged in parallel around the axis 66 of the first intermediate gear 1.
15 and 116 and the second intermediate gears 117 and 118
Are provided so as not to be relatively rotatable on the same axis, and the two output gear elements 142 and 143 are connected to the axis 66 of the drive shaft 52 and the feed screw 44.
Arranged in parallel around the fifth intermediate gear 147 and 1
48 and the sixth intermediate gears 149 and 150 are provided so as not to be relatively rotatable on the same axis, so that efficient power transmission is achieved by further miniaturization.

As described above, the electric screwdriver 1
When the drive shaft 55 is connected to the drive shaft 52, for example, the drive shaft 52 is provided with a fitting portion that fits into the drive shaft of the electric driver 155 so as to be directly connected, or
What is necessary is just to make it couple | bond indirectly via coupling etc.

The overload prevention mechanism 124 is provided with a one-way mechanism to prevent reverse rotation of the feed screw 44 when the driving device 100 is driven, that is, to prevent the upper structure 1 from lowering. Is also good.

In the driving device 100 of this embodiment, similarly to the driving device 24 described above, the sliding member and the engaging member, that is, the output gear 63, the feed screw 44, and the input gear 63 are integrally formed. Drive shaft 52,
First intermediate gears 115 and 116 and second intermediate gear 117
And 118 are formed integrally, the third intermediate gear 123, the relay shaft 141 formed integrally with the fourth intermediate gear 125, the fifth intermediate gears 147 and 148, and the sixth intermediate gear 149 and The gear shafts 145 and 146, which are integrally formed with the shaft 150, have nickel
Phosphorus plating is applied.

In the supporting device 21 of the present embodiment, the upper contact surface 46 made of a lead-fluorine-based synthetic resin is formed on the lower surface 31 of the upper pressure-receiving member 22.
The upper contact surface 46 made of a lead-fluorine synthetic resin may be formed on the upper surface 36 of the lower pressure receiving member 23, and the lower contact surface 8 made of a lead-fluorine synthetic resin may be formed on the lower surface 35 of the lower pressure receiving member 23.
4, the lower contact surface 84 made of a lead-fluorine-based synthetic resin may be formed on the upper surface 48 of the base member 26.

In the support device 21 of the present embodiment, the upper surface 36 of the lower pressure receiving member 23 and the upper surface 48 of the base member 26 are formed by nickel-phosphorus plating. It does not have to be done.
That is, the upper pressure receiving member 22, the lower pressure receiving member 23, and the base member 26 may not be plated with nickel and phosphorus.

Further, in the supporting device 21 of the present embodiment, the driving device 24 or the driving device 100 is attached to the lower pressure receiving member 23, but may be attached to the upper pressure receiving member 22.
In such a case, a member that regulates the movement of the lower pressure receiving member 23 is provided, and while the movement of the lower pressure receiving member 23 is regulated, the upper pressure receiving member 22 is connected to the lower surface 31 of the upper pressure receiving member 22.
What is necessary is just to make it relatively move between the lower pressure receiving member 23 while sliding the and the upper surface 36 of the lower pressure receiving member 23 with each other. In such a case, since the lower surface 35 of the lower pressure receiving member 23 does not slide on the upper surface 48 of the base member 26, the lower surface 3 of the lower pressure receiving member 23 does not slide.
The lower contact surface 84 made of lead-fluorine-based synthetic resin may not be formed on the upper surface 48 of the base member 5 or the base member 26.

The driving device 24 or the driving device 100
May be attached to both the upper pressure receiving member 22 and the lower pressure receiving member 23.

Further, in this embodiment, the lower structure 2 is interposed between the upper structure 1 and the lower structure 2. However, in the present invention, for example, the structure is interposed between the right structure and the left structure. It may be used as a jack device instead of the bearing member 3. In the present embodiment, the driving device 24 or the driving device 10
Although the reduction gear mechanism 53 is adopted as 0, for example,
A conventional hydraulic jack device may be employed.

[0084]

As described above, according to the first aspect of the present invention, the first pressure receiving member and the second pressure receiving member are relatively moved with respect to the applied driving force with good reproducibility. So
The reproducibility of the launch load with respect to the applied driving force is good, and the upper structure can be stably lifted with respect to the lower structure to an accurate position for a long period of time.

According to the second aspect of the present invention, the first pressure receiving member and the second pressure receiving member are capable of moving with respect to a given driving force.
Since the relative movement is performed with higher reproducibility, the reproducibility of the launch load for a given driving force is extremely good, and it is possible to lift the upper structure to the correct position with respect to the lower structure more accurately over a long period of time. it can.

According to the third aspect of the present invention, the first pressure receiving member and the second pressure receiving member react with respect to the applied driving force.
Since the relative movement is performed more smoothly and with good reproducibility, the reproducibility of the launch load with respect to the applied driving force is extremely good, and the upper structure can be lifted more accurately with respect to the lower structure to a precise position for a long time. be able to.

According to the fourth aspect of the present invention, the first pressure receiving member and the second pressure receiving member act on the applied driving force with respect to the applied driving force.
Since the relative movement is performed with good reproducibility, the reproducibility of the launch load with respect to the applied driving force is good, and the upper structure can be stably lifted with respect to the lower structure to an accurate position for a long time.

According to the fifth aspect of the present invention, the first pressure receiving member and the second pressure receiving member are capable of moving with respect to a given driving force.
Since the relative movement is performed with higher reproducibility, the reproducibility of the launch load for a given driving force is extremely good, and it is possible to lift the upper structure to the correct position with respect to the lower structure more accurately over a long period of time. it can.

According to the sixth aspect of the present invention, the first pressure receiving member and the second pressure receiving member act on the applied driving force with respect to the applied driving force.
Since the relative movement is performed more smoothly and with good reproducibility, the reproducibility of the launch load with respect to the applied driving force is extremely good, and the upper structure can be lifted more accurately with respect to the lower structure to a precise position for a long time. be able to.

[Brief description of the drawings]

FIG. 1 is a front view showing an upper structure and a lower structure to which an embodiment of a support device of the present invention is applied.

FIG. 2 is an exploded perspective view showing one embodiment of the support device of the present invention.

FIG. 3 is an upper sectional view showing an internal structure of a driving device in the support device of FIG. 2;

FIG. 4 is a side view including a partial cross section showing a use state of the support device of FIG. 2;

FIG. 5 is a side view including a partial cross section showing a use state of the support device of FIG. 2;

FIG. 6 is a side view including a partial cross section showing a use state of the support device of FIG. 2;

FIG. 7 is a diagram showing the relationship between the shaft input torque and the launch load in the support device of FIG. 2;

FIG. 8 is a diagram showing the relationship between the shaft input torque and the launching load characteristic when lubricating oil is applied to each sliding portion without forming the upper contact surface and the lower contact surface in the support device of FIG. 2; is there.

FIG. 9 is an upper sectional view showing the internal structure of a driving device according to an embodiment different from the driving device of FIG.

FIG. 10 is a side view showing a use state of a conventional support device.

FIG. 11 is a side view showing a use state of a conventional support device.

FIG. 12 is a side view showing a use state of a conventional support device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Supporting device 22 Upper pressure receiving member 23 Lower pressure receiving member 24 Drive device 26 Base member 31 Lower surface of upper pressure receiving member 35 Lower surface of lower pressure receiving member 36 Upper surface of lower pressure receiving member 46 Upper contact surface 48 Upper surface of base member 84 Lower contact surface

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Ritsu Matsushima 2-180 Iwamuro, Osaka Sayama-shi, Osaka Elephant F-term (in reference) in Sealed Chain Block Co., Ltd. 2D059 AA33 AA39 AA40 DD06 GG02

Claims (6)

[Claims] A first sliding surface having an inclined surface;
The pressure receiving member and the first pressure receiving member are overlapped, and the first pressure receiving member has a first pressure receiving member.
A second pressure receiving member having a second sliding surface formed of an inclined surface slidable with respect to the sliding surface; and a driving unit for moving at least one of the first pressure receiving member and the second pressure receiving member. By driving the driving unit, the first pressure receiving member and the second pressure receiving member are relatively moved while the first sliding surface and the second sliding surface are slid with each other. In a structure supporting device configured to be able to change the thickness of the first pressure receiving member and the second pressure receiving member in the overlapping direction, any one of the first sliding surface and the second sliding surface A supporting device for a structure, wherein one of the supporting members is formed of a lead-fluorine-based synthetic resin. 2. The Vickers hardness of the first sliding surface or the second sliding surface that is not formed of a lead-fluorine-based synthetic resin is 450 or more. A support device for the structure as described. 3. The method according to claim 1, wherein the first sliding surface or the second sliding surface that is not formed of a lead-fluorine synthetic resin is formed by nickel-phosphorus plating. 3. The support device for a structure according to 2. 4. The second pressure receiving member has a third sliding surface which is a back surface with respect to the second sliding surface, receives the second pressure receiving member, and receives a third slide of the second pressure receiving member. A base member having a fourth sliding surface slidable with respect to a moving surface, wherein the third sliding surface and the fourth sliding surface slide with each other by driving of the driving means. 4. The electronic device according to claim 1, wherein one of the third sliding surface and the fourth sliding surface is formed of a lead-fluorine-based synthetic resin. 5. A support device for the structure as described. 5. The Vickers hardness of the third sliding surface or the fourth sliding surface not formed of a lead-fluorine synthetic resin is 450 or more. A support device for the structure as described. 6. The method according to claim 4, wherein the third sliding surface or the fourth sliding surface that is not formed of a lead-fluorine synthetic resin is formed by nickel-phosphorus plating. 6. The support device for a structure according to 5.