WO2003026837A1

WO2003026837A1 - Device for moving heavy article having load reducing mechanism, and work fixing table of machine tool

Info

Publication number: WO2003026837A1
Application number: PCT/JP2002/007379
Authority: WO
Inventors: Takao Arai
Original assignee: Yugen Kaisha Newly Laboratory
Priority date: 2001-09-19
Filing date: 2002-07-19
Publication date: 2003-04-03

Abstract

A device for moving a heavy article having a load reducing mechanism for positioning an article to be supported such as a work, comprising a wedge-shaped first block having an inclined surface on an upper side, an inverse wedge-shaped second block having an inclined surface slidably in contact with the inclined surface of the first block, a third block slidably placed on the second block to support the article to be supported, and a load supporting means for supporting the third block upwardly with a predetermined pushing force from a base body with the first block placed thereon. The third block moved by the load supporting means with a load-reduced condition is supported by the second block.

Description

Heavy-duty moving device with load-reducing mechanism and fixed table for workpiece of machine tool

The present invention relates to, for example, leveling of a heavy object (workpiece) cut by a machine tool.

Heavy-duty moving equipment with a field load reduction mechanism and machine tool mounting that are ideal for performing positioning work (centering work), various types of jacking work that pushes up large heavy objects, etc. in addition to centering work for machine tools. It relates to a fixed base for a workpiece.

Ten

Background art

Conventionally, for example, when processing a workpiece as a workpiece with a machine tool, the workpiece is placed on a surface plate on the machine tool side. Then, in order to perform cutting (for example, milling) while moving the machined part of the machine tool with respect to the workpiece, after setting the workpiece on the surface plate, the coordinate system of the machine tool and the coordinate system of the workpiece are matched. Fine adjustment (centering work) needs to be performed. However, in many cases, the work has a weight of more than ten tons, and once placed on the surface plate, it has a large coefficient of friction with the surface plate. Can not.

Therefore, conventionally, when moving a supported object such as a work, the static pressure slip by hydraulic pressure is used.

Equipment using 20 surfaces, hydraulic jacks, leveling blocks, etc. are used.

The feature of the device using the static pressure sliding surface is that horizontal movement can be easily performed even for a quite large heavy object due to low frictional force, and high-precision positioning is also possible. However, the hydraulic circuit becomes large-scale, and many auxiliary devices are required for the oil recovery mechanism that is open to the atmosphere. Also, since a height adjustment mechanism for the supported object is required separately, other devices

Compared to 25, the equipment is larger, more complex, and more expensive.

The hydraulic jack has features such as small size, low cost, and easy operation, and is particularly excellent in moving up and down heavy objects.However, after stopping the hydraulic pressure, the supported object may fall by its own weight. As a result, it is difficult to adjust the position within the vertical positioning accuracy required for the machine tool workpiece, and there is no horizontal movement function, and it is necessary to use other devices together, and both vertical and horizontal directions are required. For centering work of machine tools and the like that require moving, complicated setup and operation are inevitable.

The repelling block is widely and generally used for centering a workpiece of a machine tool. It is very effective when the weight of the workpiece is light, but when the weight of the workpiece is heavy, the static friction force on the sliding surface increases, making it extremely difficult to operate manually, requiring other auxiliary equipment, and Since it does not have a movement function, it is necessary to use other devices together. For centering work of machine tools and the like that require movement in both vertical and horizontal directions, complicated setup and operation are inevitable. SUMMARY OF THE INVENTION The present invention has been made in order to solve such a problem, and provides a small and simple inexpensive moving device for a heavy object with a load reducing mechanism. An object of the present invention is to enable easy and quick centering of an object or the like. Disclosure of the invention

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention has been made as a moving device for a heavy object with a load reducing mechanism and a fixing stand for a workpiece of a machine tool. A weight moving device with a load reduction mechanism for positioning a workpiece such as a workpiece, comprising: a wedge-shaped first block having an inclined surface on an upper surface; An inverted wedge-shaped second block having a slidably contacting inclined surface; a third block slidably mounted on the second block and supporting a supported object; and the third block. And a load supporting means for supporting the first block upward from the base body on which the first block is placed at a predetermined pressure, and the third block moved in a state where the load is reduced by the load supporting means, To support in the second nibloc .

A weight moving device with a load reduction mechanism for positioning a workpiece such as a workpiece, the wedge-shaped first block having an inclined surface on an upper surface; An inverted wedge-shaped second nibloc having an inclined surface slidably in contact with the inclined surface, A third block slidably mounted on the second nib lock and capable of supporting an object to be supported, load supporting means for supporting the third block upward with a predetermined pressing force, and pushing the first block Means for pushing up the object to be supported by the load supporting means, when a gap is created between the third block and the second nib lock, by means for pushing the first block, The first block is pushed so as to eliminate the gap, and the third block is contacted and supported by the second block.

Also, there is provided a moving device for a heavy object with a load reducing mechanism for positioning an object to be supported such as a workpiece, wherein the first block has an inclined surface on an upper surface, and a sliding member slides on the inclined surface of the first block. A second nibloc having an inclined surface that freely contacts and supporting a supported object; and a load for supporting the second block upward with a predetermined pressing force from a base body on which the first block is placed. A supporting means, and means for pushing the first block, wherein the load supporting means pushes up the object to be supported, so that when a gap is generated between the second block and the first block, The first block is pushed so as to eliminate the gap by means for pushing one block, and the second block is contact-supported by the first block.

A feature of the machine tool as a fixed base for the workpiece is that the workpiece is a fixed base for the workpiece of the machine tool such as a table or a base provided on a base capable of moving the workpiece. That is, a plurality of moving devices for attached heavy objects are provided.

INDUSTRIAL APPLICABILITY As described above, the present invention can be used as a centering work device for a workpiece of a machine tool or a jack for lifting a supported object. In particular, when used as a centering work device, the third block or the second block on which the load of the supported object acts is moved in an arbitrary direction while being supported by the load supporting means, and the third block or the second block is moved at that position. Since the block is supported by the second block that can move up and down by the wedge function with the first block, for example, the work of centering the work of the machine tool can be performed easily and quickly with a simple configuration, Safety such as fall prevention can be achieved.

In addition, when the load supporting means is operated by hydraulic pressure, there is no need to increase the oil pressure as compared with conventional devices using a static pressure sliding surface or hydraulic jacks, and the hydraulic device becomes larger. Therefore, leakage of pressure oil such as a static pressure sliding surface can be prevented.

In the case where the third block is provided with a movement adjusting device for moving the third block in a predetermined direction and preventing the third block from being moved by an external force acting on the third block, the third block is provided with a load reducing device ( When the third block is supported by the load support means, it is possible to prevent the third block from being unintentionally moved. In other words, when a spherical joint is used as the load support means, if the third block is displaced from the center position, the spherical seat of the spherical joint automatically slides due to the load and moves outward from the center position. As a consequence, the moving device can prevent the third block from moving.

Note that the third block is displaced from the center position, for example, when the load support means is fixed to the base body on which the first block is mounted and has a cylinder section having a cylinder chamber; The piston rod is displaced from the vertical position in the case where the piston rod is provided so as to be vertically movable.

When a sensor for detecting the lifting of the third block is provided, when a plurality of weight moving devices are arranged and the supported object is supported by each third block, It is possible to control the supporting force, and to support the object to be supported evenly.

In addition, in the case where a guide body for guiding the movement of the third block in one specific direction and a direction perpendicular to the minus direction is provided, a plurality of heavy load moving devices are arranged as described above to cover the third block. When the support is supported by each third block, when the third block is moved and then restored to the original position, the third block can move and rotate in only two directions of the guide body to guide. Because there is no, it can be restored reliably.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a cross-sectional front view of a heavy object moving device according to a first embodiment of the present invention ₍ FIG. 2 is a cross-sectional plan view of the same).

FIG. 3 is a side view including the partial cross section.

FIG. 4 is an overall front view including the partial cross section. FIG. 5 is a plan view showing an arrangement of the heavy object moving device.

FIG. 6 is a sectional side view of a heavy object moving device according to the second embodiment of the present invention. FIG. 7 is a front view of the same section.

FIG. 8 is a sectional front view showing the first to third blocks.

FIG. 9 is a partial cross-sectional plan view schematically showing the inner and outer blocks.

FIG. 10 is a cross-sectional front view of the heavy object moving device according to the third embodiment of the present invention. FIG. 11 is a side view including the partial cross section.

FIG. 12 is a cross-sectional front view of a heavy object moving device according to a fourth embodiment of the present invention. FIG. 13 is a sectional plan view of the same.

FIG. 14 is an exploded perspective view of the movement adjusting device.

FIG. 15 is a front view showing the same sensor.

FIG. 16 is a cross-sectional front view of the heavy object moving device according to the fourth embodiment of the present invention. FIG. 17 is a side view including the partial cross section.

FIG. 18 is a perspective view of the guide body.

FIG. 19 is a plan view showing an arrangement of the heavy object moving device.

FIG. 20 is a plan view showing an arrangement of the heavy object moving device. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described.

FIGS. 1 to 5 show a first embodiment of the present invention. In FIGS. 4 and 5, reference numeral 1 denotes, for example, a fixing table fixed to the side of a machine tool such as an NC floor type horizontal milling boring machine. On the surface plate, a supported object (work) 3 processed by the machine tool is supported above the surface plate 1. The work 3 has a weight of, for example, more than ten tons.

Further, between the workpiece 3 and the surface plate 1, a plurality of heavy object moving devices 5 with a load reduction mechanism for centering are interposed. In the present embodiment, the heavy object moving devices 5 are provided at a plurality of locations (for example, four locations) of the surface plate 1. Work 3 is a heavy object as shown in Fig. 4. The table (not shown) may be placed directly on the moving device 5 or the work 3 may be placed on the table (not shown).

As shown in FIGS. 1 to 3, each heavy object moving device 5 is slidably provided so as to reciprocate on a base body 8 mounted on the surface plate 1 side and the base body 8. A first block 9; a second block 10 placed on the first block 9; a third block 11 placed on the second block 10; Load supporting means 13 for pressing and supporting the load.

Shaft supports 15 are fixed to the front and rear positions of the base body 8, respectively, and both the shaft supports 15 have poles penetrated through through holes 9a formed in the first block 9. A screw shaft 16 is supported so as to be rotatable horizontally in any direction. A nut 18 screwed to the pole screw shaft 16 is fitted and fixed to one end of the first block 9.

Therefore, when the first block is moved by rotating the pole screw shaft, the second block 10, the third block 11, and the load 3 3) The sliding surface load on each sliding surface can be reduced, and the pole screw shaft can be moved up and down and positioned with a small operating torque.

When the first block 9 is moved, the pole screw shaft 16 is automatically rotated by the nut 18 fixed to the first block 9 as the first block moves. Movement of the first block 9 is allowed.

Also, as shown in FIG. 2, the first block 9 is formed with hydraulic chambers 20 and 20 in parallel so as to be located on both sides of the pole screw shaft 16. A cylinder rod 23 having a piston portion 21 at the front end is slidably inserted into each of the hydraulic chambers 20, 20. Each of the cylinder rods 23 has a base supported by the shaft support 15 and an oil passage 25 communicating with the hydraulic chambers 20 and 20, respectively. Therefore, the oil supplied to the oil passage 25 is filled in the hydraulic chambers 20 and 20, so that the first block 9 can be moved forward (moved in the direction of the arrow).

The first block 9 is pushed by the hydraulic chambers 20 and 20 and the cylinder rod 23. Each of the cylinder devices is configured as means for causing the cylinder device to operate. Oil of a predetermined pressure can be supplied to each cylinder device by a hydraulic supply pump device (not shown). In addition, a pump device is provided for each heavy object moving device 5.

On the upper surface of the first block 9, a smooth inclined surface 9b that becomes lower in the forward direction is formed. Here, the first block 9 has a wedge shape whose upper surface is inclined.

The lower surface 10 a of the second block 10 is formed on an inclined surface slidable on the inclined surface 9 b of the first block 9, and the second block 10 is movable up and down by movement of the first block 9. It has a unique inverted wedge shape.

The upper surface 1 Ob of the second block is formed in a smooth horizontal plane, and the third block 11 is placed on the upper surface. The load support means 13 is connected between the second block 11 and the base body 8 as shown in FIG. The load support means 13 is, for example, a cylinder device with a spherical joint. Specifically, a cylinder chamber 28 is formed in the base body 8, and a piston 29 fitted in the cylinder chamber 28 is connected to the lower end of the piston port 30 through a spherical joint 31. Are linked. The upper end of the piston rod 30 is also connected to the third block 11 via a spherical joint 32. The spherical joints 31 and 32 are not particularly limited, such as those in which an uneven spherical surface is made slidable, and those in which one convex spherical surface is made to slide the other conical surface. .

The cylinder chamber 28 is provided with a hydraulic supply pump device (not shown) that raises the piston 29 (the same pump device that operates a cylinder device for pushing the first block 9). , Or a separate one.) To supply oil at a predetermined pressure. In addition, a hydraulic pump device is provided for each of the heavy load moving devices 5 via a hydraulic device capable of setting a hydraulic pressure.

The apparatus according to the first embodiment has the above configuration. Next, a case where the apparatus is used for centering work 3 on a machine tool will be described.

First, each heavy object moving device 5 is set at a predetermined position of the surface plate 1, and the work 3 suspended by, for example, a crane is placed on the heavy object moving device 5 (see FIGS. 4 and 5). Also, When the hydraulic supply pump device of each heavy load moving device 5 is operated, the oil pumped from the pump device is supplied to the load supporting means 13 of each heavy load moving device 5 through each pipe. The hydraulic pressure supplied to the load supporting means 13 is set smaller than the load of the work 3 acting on the third block 11 of each heavy load moving device 5. The supply of oil to the cylinder device that pushes the first block 9 is stopped. The stop or change of the hydraulic pressure can be easily performed by an adjustment valve (not shown).

As a result, the load acting on the third block 11 is reduced, and the second block 10 is pressed against the first block 9 via the respective slopes. The inclined surfaces of the first block 9 and the second block 10 are set at an angle at which the second block 10 does not slide due to the load. In this state, the first block 9 can be moved by rotating the pole screw shaft 16 in a desired direction with a handle or the like.

For example, when the first block 9 is advanced to slightly raise the work 3, the load support means 13 presses the third block 11 upward to urge the second block 10 and the first block 9. Since the load acting on the block 9 is reduced and the frictional force between the second block 10 and the first block 9 is reduced, the first block 9 can be advanced with a small force.

Conversely, when the first block 9 is retracted, the wedge function between the first block 9 and the niblock 10 is released, so the first block 9 is moved backward with a smaller force. be able to. That is, with the oil pressure of the load supporting means 13 set to be smaller than the load of the work 3 as described above, the first lock 9 is moved backward by rotating the pole screw shaft 16 and the second block 10 And the third block 11 is lowered. As described above, the work 3 is moved in the horizontal direction after the level of the work 3 is obtained by operating each of the heavy load moving devices. When the workpiece 3 moves horizontally, the frictional force between the third block 11 and the second block 10 is reduced, and both ends of the cylinder rod 30 of each load supporting means 13 are connected to the base. Since the body 8 and the third block 11 are swingable by the spherical joint, the peak 3 can be moved in an arbitrary direction. When the position of the work 3 is set, the supply of the hydraulic pressure to each load supporting means 13 is stopped. At this time, due to the load of the workpiece 3, a wedge function occurs between the inclined surfaces where the second block 10 and the first block 9 come into contact, and the second block 10 does not move unintentionally. These blocks 9, 10, and 11 can reliably hold the data.

In this way, when positioning the work 3, the third block 11, the second block 10, and the first block 9 are mutually pressed by pressing the third block 11 upward with the load supporting means 13. The sliding resistance of the contact surface can be greatly reduced, and the workpiece 3 can be easily moved to a predetermined position to perform centering.

The heavy object moving device 5 can be used as a jack for raising and lowering the supported object, in addition to the centering device. Specifically, it is usually used in many cases other than the work of centering the work piece 3 in the machine tool, and its use mode is the same as that in FIGS. 1 to 5 described above. In addition, surface plate 1 corresponds to the grounding part.

First, when the hydraulic supply pump device of each heavy load moving device 5 is operated, the oil pumped from the pump device is supplied to the load supporting means 13 of each heavy load moving device 5 through each pipe. . The hydraulic pressure supplied to the load supporting means 13 is set to be larger than the load of the supported object 3 acting on the third block 11 of each heavy object moving device 5, and each piston 2 of each heavy object moving device 5 9 rises, and the piston rod 30 pushes up the third block 11 slightly. ·

Further, although the gap is generated between the blocks by pushing up the third block 11, the oil is also supplied to the cylinder device for pushing the first block 9, so that the gap is not generated between the blocks. Move one block 9 forward so that the wedge effect can be achieved. In addition, as the first block 9 moves forward, the poll screw shaft 16 automatically rotates to allow the first block 9 to move.

When the supported object 1 reaches the predetermined height position, the supply of oil to the cylinder device that has pushed the first block 9 is stopped. At this time, a wedge function occurs between the inclined surface of the second block 10 and the first block 9 due to the load of the supported object 3, and the second block 10 does not move carelessly. 3 is assured by these blocks 9, 10 and 11 Can be held.

When lowering the supported object 3, the cylinder device for pushing the first block 9 is released (the oil in the hydraulic chamber 20 is released freely), and the load supporting means 1 is released. With the hydraulic pressure of 3 being reduced as described above, the first lock 9 is moved backward by rotating the pawl screw shaft 16, and the second block 10 and the third block 11 are lowered. Second embodiment

6 to 9 show a second embodiment of the present invention. Specifically, a base body 8, a first block 9, a second block 10, and a third block 11 are provided in the same manner as in the first embodiment. Therefore, the same members as those of the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In the present embodiment, the first block 9 includes a pair of inner blocks 9A and a pair of outer blocks 9B. Both inner blocks 9A are connected to the connecting member 45, both outer blocks 9B are connected to the connecting member 46, and the inner block 9A and the outer block 9B are arranged to face each other. ing. The connecting members 45 and 46 are provided with nuts 47 and 48 screwed to the trapezoidal screw shaft 16 respectively.

The trapezoidal screw shaft 16 has a threaded portion 16 a into which one nut member 47 is screwed, a right-hand thread, and a threaded portion 16 b with which the other nut member 48 is screwed, left-handed screw. By rotating the screw shaft 16, the inner block 9A and the outer block 9B can be moved closer to or away from each other. The inner and outer blocks 9A, 9B are raised so that the second block 10 and the like are raised when the inner and outer blocks 9A and 9B approach each other, and the second block 10 and the like are lowered when they are separated from each other. 9B and the inclined surfaces 9b and 10a of the second block are respectively formed.

The inner and outer blocks 9A and 9B are brought closer to each other by making the inclination angles of the inner and outer blocks 9A and 9B and the inclined surfaces 9b and 10a of the second nibble opposite to those described above. In such a case, the second block or the like may be lowered, and when separated from each other, the second block or the like may be raised. The first block 9 has a pair of blocks inside and outside. It is not always necessary to provide it, and it may have an inclined surface inclined in one direction as in the first embodiment.

A load support means 13 is provided between the inner blocks 9A, 9A. Specifically, the load supporting means 13 is fixed to the base body 8 and has a cylinder portion 35 having a cylindrical cylinder chamber 35a, and is fitted inside the cylinder chamber 35a so as to be able to move up and down. A biston part 36 is provided.

A holder 38 is rotatably supported on the upper surface of the piston portion 36 via a bearing 39. A linear motion rolling bearing 40 that supports the third block 11 movably in a linear direction is provided on the upper surface of the holding body 38. The linear motion rolling bearing 40 includes a side guide 43 (a fixed side 43a fixed to the third block 111) and a moving body 43c that moves together with the linear motion rolling bearing 40 via the guide 43b. It can be moved freely through). Here, the third block 11 is movable in the rolling direction of the linear motion rolling bearing 40 with respect to the holding body 38, and the holding body 38 is disposed on the fixed side of the piston portion 36 and the like. It is freely rotatable. Therefore, the third block 11 can be moved in any horizontal direction.

As in the first embodiment, a predetermined pressure of oil can be supplied into the cylinder chamber 35a by a hydraulic supply pump device to raise the piston portion 36.

The device according to the second embodiment has the above-described configuration. Next, an example of use of the device will be described. Setting each heavy object moving device 5 on the surface plate 1 and mounting the hook 3 on the heavy object moving device 5 is the same as described above.

Then, the hydraulic supply pump device or the like of each heavy load moving device 5 is operated to supply oil to the load supporting means 13 of each heavy load moving device 5. The hydraulic pressure supplied to the load supporting means 13 is set smaller than the load of the work 3 acting on each third block 11. The third block 11 is pressed and urged upward through the piston 36, the holding body 38 and the linear motion rolling bearing 40. When the load acting on the second block 10 is reduced and the trapezoidal screw shaft 16 is rotated in any direction with a handle or the like, the inner and outer blocks 9 A, 9 B can be moved in the direction of approaching or moving away.

For example, when the inner and outer blocks 9A and 9B approach each other, the work 3 can be slightly raised together with the second nib lock 10, and when it is separated, the work 3 can be lowered slightly.

As described above, after the level of the work is obtained by operating each of the heavy load moving devices 5, the workpiece 3 is moved in the horizontal plane direction. When the workpiece 3 moves horizontally, the linear motion rolling bearing 40 facilitates the movement of the third block 11. Although the linear motion rolling bearing 40 only moves the third block 11 in a linear direction, the linear motion rolling bearing 40 is supported by a horizontally rotatable holder 38 so that the linear motion The rolling bearing 40 can be set in the moving direction of the work 3 in advance by rotating on a horizontal plane.

When the position of the work 3 is set, the supply of the hydraulic pressure to each load supporting means 13 is stopped. Since the second block 10 holds the third block, the third block 11 does not inadvertently descend.

Third embodiment

FIGS. 10 and 11 show a third embodiment of the present invention. Since the basic configuration is the same as that of the first embodiment, the same members are given the same names, and the description is omitted.

In the third embodiment, the third block 11 is omitted, and the work (supported object) 3 is held by the second block 10. The load support means 13 includes a cylinder body 30a and a piston 30b. The cylinder body 30a is connected to the second block 10 (or the base body 8) via a spherical joint 32. In addition, the piston rod of the piston 30b is connected to the base body 8 (or the second block 10) via the spherical joint 31.

Fourth embodiment

12 to 15 show a fourth embodiment of the present invention. In this embodiment, since the basic configuration is the same as that of the first embodiment, the same members are denoted by the same reference numerals and description thereof will be omitted. In the present embodiment, the third block 11 A horizontal movement adjusting device 50 for restricting movement in the same axis 16 direction is provided. Further, in the present embodiment, means for pushing the first block 9 exemplified in the first embodiment is not provided.

Specifically, as shown in FIGS. 12 and 13, the horizontal movement adjusting device 50 includes a rotating shaft 52 arranged above and parallel to the pole screw shaft 16, and a rotating shaft 5. And a nut body 55 screwed into a trapezoidal screw portion 53 formed on the outer periphery of 2. Note that the trapezoidal screw portion 53 is formed over substantially the entire length of the rotating shaft 52. The rotation shaft 52 is rotatably supported by the shaft support 15 that supports the pole screw shaft 16 via a bearing 56.

As shown in FIGS. 13 and 14, the nut body 55 is held by a pair of holders 57, 57. The holders 57, 57 are fixed to the lower surface of the third block 11 at predetermined intervals by a port 58. Protrusions 60 are formed on the inner surfaces of the holders 57 and 57 in the vertical direction.

A groove 61 is formed on both sides of the nut 55, in which the protrusions 60 of the holders 57, 57 are slidably fitted in the vertical direction. Therefore, as the third block 11 moves up and down, the holders 57 and 57 are also movable vertically relative to the nut body 55 screwed to the rotating shaft 52. At one end of the rotating shaft 52, a connecting portion 63 is provided for rotating by a handle, a horseshoe motion device or the like (not shown).

Therefore, when the third block 11 is supported by the load support means 13, the third block 11 is moved by rotating the rotating shaft 52 forward or backward through the connecting portion 63. be able to. The horizontal movement adjusting device 50 includes a self-locking feed screw mechanism including the rotating shaft 52, the nut body 55, and the holding body.

The third block 11 of the fourth embodiment is configured to reciprocate in a linear direction along the pole screw shaft 16 by a guide member not shown.

If the third block 11 is separated from the second block 10, the second block 11 tries to move due to the load of the work 3. At this time, the third block 1 1 side The holding members 57, 57 of the nut try to move the nut body 55 in the direction of the rotating shaft 52. However, since the nut body 55 is screwed into the trapezoidal thread 53 of the rotating shaft 52, the nut body 55 is locked to the rotating shaft 52 (the nut body 55 is It is in an automatic lock state in which it cannot move while rotating the rotary shaft 52). As a result, the movement of the nut body 55 is restricted, and the piston block 30 of the load support means 13 is slightly inclined and deviates from the vertical position, so that the third block 11 can be prevented from being accidentally moved. . As shown in FIGS. 12, 13, and 15, the second block 10 is provided with a sensor 65 for detecting that the third block 11 is floating with respect to the second block 10. Installed. Here, that the third block 11 rises with respect to the second block 10 means that the lower surface of the predetermined portion of the third block 11 is separated from the upper surface of the second block 10, This refers to the case where the load on the second block 10 of the third block 11 becomes less than or equal to a predetermined force.

When the sensor 65 is in contact with the third block 11 as shown in FIG. 15 (when the third block does not float from the second block), the contact of the sensor 65 is closed. Since the sensor 65 is energized, a normal signal is transmitted to, for example, an alarm device, and the alarm device does not operate.

If the third block 11 rises from the second block 10 (shown by a phantom line in FIG. 15), the contact of the sensor 65 opens, or the sensor 65 comes out of the third block 11. Due to the separation, the power supply becomes of f and the sensor 65 sends an abnormal signal to the alarm. Since the alarm is activated by the abnormal signal and issues an alarm, the operator lowers the oil pressure of the load supporting means 13 on the sensor 65 side that has detected the abnormality to a predetermined pressure, and the third block 11 The load acting on the second block 10 can be set uniformly.

In this embodiment, the alarm is issued to allow the operator to adjust the oil pressure of the load supporting means 13. However, the signal of the sensor 65 controls the hydraulic device (not shown). The hydraulic pressure of the load support means 13 may be controlled.

Fifth embodiment

FIG. 16 to FIG. 18 show a fifth embodiment of the present invention. In the present embodiment, the first Since the basic configuration is the same as that of the embodiment, the same members are denoted by the same reference numerals and description thereof will be omitted. In the present embodiment, a guide body 70 for guiding the third block 11 to move in the XY direction (horizontal direction or vertical direction on a plane) is provided. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Further, in the present embodiment, the means for pushing the first block 9 illustrated in the first embodiment and the horizontal movement adjusting device 50 illustrated in the fourth embodiment are not provided. .

As shown in FIG. 18, the guide body 70 includes a pair of parallel horizontal rails 71, and a pair of parallel vertical rails 72 provided on the upper surfaces of both horizontal rails 71, and a force plate, as viewed in plan. It is formed in a rectangular shape. As shown in FIG. 16, the inner surface 71 a of the horizontal rail 71 is slidably fitted to the outer surface 10 a of the second sub-block 10. Further, an escape recess 74 for allowing the sensor 65 to escape is formed on the inner surface 71 a of each horizontal rail 71.

As shown in FIGS. 16 and 17, the vertical rail 72 is slidably fitted in a guide groove 75 formed on the lower surface of the third block 11.

Therefore, when the third block 11 moves in the X direction (the left-right direction shown in FIG. 16), the guide body 70 also moves in the same direction together with the third block 11. At this time, since the inner surface 71a of the horizontal rail 71 slides on the outer surface 10a of the second block 10, only the movement of the third block 11 in the X direction is allowed.

When the third block 11 is moved in the Y direction (the left-right direction shown in FIG. 17), the inner surface 71 a of the horizontal rail 71 of the guide body 70 becomes the outer surface 10 10 of the second block 10. The guide body 70 is fixed to the second block 10 because it is in contact with a from both sides. The guide groove 75 of the third block 11 slides on the second block, and the third block 1 1 allows only movement in the Y direction.

Next, a case in which the heavy object moving device according to the fourth embodiment and the heavy object moving device according to the fifth embodiment are used in combination will be described. First, a pair of heavy-weight devices 5a and 5b shown in the fourth embodiment and a pair of moving devices 5c and 5c shown in the fifth embodiment are arranged as shown in FIG. . Incidentally, a pair of devices shown in the fourth embodiment 5a and 5b are arranged to move in the direction of the arrow (X direction). Further, the pair of devices 5c, 5c shown in the fifth embodiment are arranged so as to move in the XY directions. Each device 5a, 5b, 5c, 5c operates the load support means 13 to operate the third block 11 on which the workpiece 3 is placed, as shown in the first embodiment. To support. Further, the work 3 can be moved in the X direction by operating the horizontal adjustment device 50 of the pair of devices 5a and 5b shown in the fourth embodiment.

As shown in FIG. 20, by operating the horizontal adjustment device 50 of the other device 5b shown in the fourth embodiment, the work 3 can be rotated around the one device 5a. Is also possible.

The pair of devices 5a and 5b shown in the fourth embodiment can move the third block 11 linearly, and the devices 5c and 5c of the fifth embodiment have a third block 1 Since the guide body 70 for guiding 1 in the X-Y directions is provided, the third block 11 of one of the pair of devices 5a and 5b shown in the fourth embodiment is reversed and moved. When restoring to the original position, the third block 11 of each device 5a, 5b, 5c, 5c moves only in the X or Y direction without rotating, and returns to the original position. Will be restored.

The present invention is not limited to the above embodiments. For example, in the first embodiment, the third embodiment, the fourth embodiment, and the fifth embodiment, the first block is pushed. Although the hydraulic cylinder mechanism is used as the moving cylinder device, a torque motor that can rotate the pole screw shaft 16 with a predetermined torque may be used. Although the oil is exemplified as the working fluid, a liquid or a gas other than the oil may be used. In addition to the surface plate, a table that can be placed on a workpiece and that can be moved may be used as the fixed base of the machine tool.

Claims

The scope of the claims

1. A moving device for a heavy object with a load reduction mechanism for positioning a workpiece such as a workpiece, comprising: a first wedge-shaped block having an inclined surface on an upper surface; and an inclined surface of the first block. An inverted wedge-shaped second block having an inclined surface slidably contacting the second block, a third block slidably mounted on the second block and supporting a supported object, and the third block. Load support means for supporting the first block upward from the base body with a predetermined pressing force, wherein the third block moved in a state where the load is reduced by the load support means, A heavy-weight moving device with a load-reducing mechanism, characterized in that it is supported by a load.

2. A moving device for a heavy object with a load reducing mechanism for positioning a supported object such as a workpiece, comprising: a wedge-shaped first block having an inclined surface on an upper surface; and an inclined surface of the first block. An inverted wedge-shaped second block having an inclined surface slidably contacting the third block, a third block slidably mounted on the second block and capable of supporting a supported object, and the third block. A load support means for supporting the first block upward with a predetermined pressing force; and a means for pushing the first block, wherein the load support means pushes up the supported object, thereby forming a third block and a second block. When a gap is generated between the first block and the second block, the first block is pushed so as to eliminate the gap by means for pushing the first block, and the second block is contact-supported by the second block. Heavy load with load reduction mechanism The mobile device.

3. A device for moving a heavy object with a load reduction mechanism for positioning a supported object such as a work object, wherein the first block has an inclined surface on an upper surface, and slides on the inclined surface of the first block. A second nibloc having an inclined surface that freely contacts and supporting the object to be supported; and a load for supporting the second block upward from a base body on which the first block is placed with a predetermined pressing force. A supporting means, and means for pushing the first block, wherein the load supporting means pushes up the object to be supported, so that when a gap is generated between the second block and the first block, The first block is pushed by means for pushing the first block so as to eliminate the gap, and the second block is contacted and supported by the first block. Heavy load moving device with load reduction mechanism.

4. The first block and the second block are provided as a pair or more at intervals, wherein the load support means is a cylinder fixed to a base body on which the first block is mounted and having a cylinder chamber. The moving device for a heavy object with a load reducing mechanism according to claim 1 or 2, further comprising: a piston portion (12) fitted inside the cylinder chamber so as to be movable up and down, wherein the piston portion supports the second block.

5. The heavy object with a load reducing mechanism according to claim 1 or 2, wherein the load support means comprises a cylinder device connected to the base body provided with the first block and the third block via a spherical joint. Moving equipment.

6. The load reducing device according to claim 1 or 2, further comprising a movement adjusting device that moves the third block in a predetermined direction and that prevents the third block from moving due to an external force acting on the third block. A heavy equipment moving device with a mechanism.

7. The movement adjusting device comprises: a rotation shaft rotatably supported on the base body side and having a threaded portion on a surface; a nut body screwed to the rotation shaft; and a third body for holding the nut body. 3. A self-feeding feed screw mechanism comprising a holding member provided on a block side, wherein the holding member is provided so as to be vertically movable relative to the nut body. Heavy load moving device with load reduction mechanism.

8. The moving device for a heavy object with a load reducing mechanism according to claim 1, further comprising a sensor for detecting that the third block is lifted.

9. The moving device for a heavy object with a load reducing mechanism according to claim 1, further comprising a guide body for guiding the movement of the third block in one specific direction and a direction perpendicular to the one direction. Place.

10. A fixed table for a workpiece to be applied to a machine tool such as a table or the like, which is mounted on a table or a base on which a workpiece can be moved, wherein the weight with the load reduction mechanism according to claim 1, 2 or 3. A fixed base for a workpiece of a machine tool, comprising a plurality of object moving devices.