JP2000291653A - Roller guide device and table guide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide automatic aligning property, resistance against shock, and damping property by providing a row of barrel-shaped rollers between a block main body part and a rail main body part and a row of drum-shaped rollers between right and left support piece parts and right and left overhang parts of the block main body part. SOLUTION: A row of barrel-shaped rollers 12 constituted by many barrel- shaped rollers 13 in one row each are provided along the longitudinal direction of a rail main body part 4 in a region corresponding to a base part 5 between upper faces of right and left overhang parts 41 of the rail main body part 4 and a lower face of a block main body part 6. A row of drum-shaped rollers 21 constituted by many drum-shaped rollers 22 in one row each are provided between lower faces of the right and left overhang parts 41 and a support piece part 9. A cross section in the direction of width of the rail main body part 4 has a circular arc shape, the rollers 13, 22 slide along it, and mounting errors in a travel block 3 and a track rail 2 are absorbed even if there are the mounting errors. Moreover, an impact load can be absorbed by elastic deformation of the overhang part 41, and damping property can be obtained by differential slide of the barrel-shaped and drum-shaped rollers 13, 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller guide device used for a guide portion of a machine tool or a seismic isolation device of a building, and a table device using the same.

[0002]

2. Description of the Related Art As a rolling element of a rolling guide device, a roller is used rather than a ball to support a heavy load because a roller has a smaller shape and a higher pressure resistance than a ball in terms of shape due to its shape. It is advantageous to do so. As such a roller guide device, for example, as shown in FIG. 16, cylindrical rollers 512 and 512 are arranged on the upper surface and the lower surface of a shoulder 511 of a track rail 510, and a moving block is provided via the rollers 512 and 512. A configuration in which the 513 is guided to roll along the track rail 510 is conceivable.

[0003]

However, in the case of the roller 512, unlike the ball, there is no self-aligning property. Therefore, due to a mounting error or the like, as shown by a two-dot chain line in FIG. Stand 514,
Guided member 515 to which moving block 513 is attached
If the degree of parallelism is poor, excessive stress is generated at the left and right ends of the roller 512, and the roller 512 and the raceway surface may be damaged. There has been a problem that even if it is not damaged, it is easily worn and its durability is deteriorated. In addition, even if it is mounted with high accuracy, if an impact load is applied,
Excessive stress may act on both the left and right ends of the.

On the other hand, the linear guide device aims at minimizing the sliding resistance and guiding lightly. However, in recent machine tools, as the speed has been increased, if the sliding resistance is small, There has been a problem that vibrations and the like at the time of cutting are increased and adversely affect processing accuracy. As a countermeasure, in the case of a rolling guide device using a ball, the differential slip caused by the difference in the ball diameter between the center and the peripheral portion of the contact portion is actively used to increase the damping property. (See, for example, JP-A-7-35136). However, in the case of using the cylindrical roller 512 described above, since the diameter is the same at any position in the length direction of the roller 512, the differential slip cannot be used, and the damping property cannot be sufficiently increased. was there. A roller guide device 501 used in a seismic isolation device for a building or the like as shown in FIG. 15 is also conventionally known. That is,
A first track rail 504 fixed to the base 502 and curved so as to protrude downward;
A second track rail 505 that is provided above and is orthogonal to the first track rail 504 and is fixed to the building 500;
A first moving block 50 that is movably mounted on an upper surface of the first track rail 504 via a roller row (not shown).
3 and a second moving block 5 that is movably mounted on the lower surface of the second track rail 505 via a roller row (not shown).
06, the first moving block 505 and the second moving block 5
Absorption mechanism 50 for connecting relative 06 to absorb relative inclination
7 is provided. First moving block 5
Considering that case 03 moves in the longitudinal direction from the lowermost point of the first track rail 504, while the inclination angle in the longitudinal direction of the upper surface of the first moving block 503 changes, the building 50 moves.
Since the second track rail 505 fixed to zero moves in a curved state in a horizontal state, the lower surface of the second moving block 506 also remains in a horizontal state. As it is, the second moving block 5
06 and the second track rail 505 are damaged by excessive stress, or the first moving block 503 does not move. Therefore, conventionally, the first and second tilt absorbing mechanisms 507 are used.
The inclination between the moving blocks 503 and 506 was absorbed. As the inclination absorbing mechanism 507, an elastic body has been conventionally interposed to absorb the inclination by its elastic deformation, or a universal joint has been used. However, when an elastic body is used as the inclination absorbing mechanism, the maximum load that can be supported depends on the elastic body, so that the high load supporting ability of the roller guide cannot be utilized. Also, the inclination absorbing mechanism 50
Even when a universal joint is used as 7, since the maximum load that can be supported depends on the universal joint, there is also a problem that the high load supporting ability of the roller guide cannot be utilized and the structure becomes complicated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to use a roller having a higher rigidity than a ball, and to have a self-aligning property and an impact resistance. It is another object of the present invention to provide a roller guide device and a table guide device which are excellent in damping properties and have a damping property. Further, when the present invention is applied to a seismic isolation device or the like, it is another object of the present invention to make it possible to absorb a tilt due to slippage of a roller and to eliminate a tilt absorbing mechanism.

[0006]

In order to achieve the above object, the invention according to the first aspect of the present invention comprises a rail main body extending in a longitudinal direction, a base supporting a central portion of the rail main body in a width direction, and a base. , The cross-sectional shape in the width direction of the projecting portion projecting left and right from the base portion of the rail main body portion is formed into an arc shape curved so as to project toward the base portion side, and the upper surface and the lower surface of each projecting portion are concentric. A track rail having an arc shape, a block body facing the upper surface of the rail body, a pair of left and right legs projecting downward from both ends in the width direction of the block body, and a track rail from the legs. A moving block having a support piece protruding toward the center in the width direction and facing the lower surface of the left and right overhanging portions of the rail body, and between the block body and the upper surface of each overhang of the rail body. Leh A row of barrel-shaped rollers composed of a large number of barrel-shaped rollers interposed rotatably along the longitudinal direction of the main body, left and right support pieces of the block main body, and left and right overhanging lower surfaces of the rail main body. And a row of hourglass rollers constituted by a number of hourglass rollers interposed rotatably along the longitudinal direction of the rail body. Since this roller guide device uses a barrel-shaped roller array and a drum-shaped roller array, a roller guide device having higher rigidity can be realized as compared with a case using balls.
Loads from above are supported by a row of barrel-shaped rollers that contact the upper surface of the rail body, and lifting loads from below are supported by a row of drum-shaped rollers that contact the lower surface of the rail body, supporting loads from both upper and lower directions. can do. Further, since the cross-sectional shape in the width direction of the rail main body portion is an arc shape, the barrel roller and the hourglass roller slide along the upper and lower circular arcs of the rail main body portion, and the moving block can move in an arc. Therefore, even if there is a mounting error between the moving block and the track rail, for example, the parallelism between the mating mounting surfaces of the moving block and the track rail is incorrect, the moving block moves along the rail body in accordance with the mounting error. The mounting error is absorbed. Even if the moving block moves in an arc, the contact state of the barrel-shaped roller and the hourglass roller with the arc-shaped rail main body does not change.
Furthermore, when an impact load is applied, the left and right overhanging portions of the rail main body are elastically deformed to absorb the impact load, thereby preventing excessive stress from acting on the ends of the barrel-shaped roller and the drum-shaped roller. be able to. As described above, according to the present invention, it is possible to realize a linear roller guide device having high rigidity, self-alignment, and excellent impact resistance. In addition, the barrel-shaped roller and the drum-shaped roller as rolling elements have different diameters at a cross section perpendicular to the center axis of each roller at the center portion and at both end portions in the axial direction. However, differential slip occurs during rolling. Damping can be provided by this differential slip. The roller guide device alone has a degree of freedom along the arc shape in the width direction of the rail main body, and therefore cannot support the lateral load. However, when assembling to a table or the like, the roller guide devices are used together, or the roller guide device and a pair of other rolling guide mechanisms of different structures such as rollers and balls are used in pairs, and the moving block is guided by a table or the like. Since the moving block cannot move in the arc direction in a state where the members are assembled, the moving block can also support a lateral load, and can basically support loads in four directions, up, down, left and right.

According to a second aspect of the present invention, the radius of curvature of the arc-shaped outer line cut along a plane passing through the center axis of the barrel-shaped roller is determined by the curvature of the arc-shaped cross-section on the upper surface of the left and right overhanging portions of the rail body. It is characterized in that it is set slightly smaller than the radius. With this configuration, the center of the barrel-shaped roller comes into contact with the upper surface of the overhanging portion of the rail main body, and both ends are slightly lifted up. During the light load, the resistance due to the differential slip is not so large. It moves lightly without being large, and when a heavy load such as cutting is applied, the barrel-shaped roller is compressed and contacts the upper surface of the rail main body over the entire length up to both ends, thereby increasing the differential slip and increasing the damping performance. For example, the radius of curvature of the arc-shaped outer line cut along a plane passing through the center axis of the barrel-shaped roller is set within the range of approximately 0.95 to 0.99 of the radius of curvature of the arc-shaped cross-section on the upper surface of the rail main body. It is preferable to set. With this setting,
Differential slip works effectively.

The invention according to claim 3 is characterized in that a rail fixing bolt hole is opened in a region corresponding to the base on the upper surface of the rail main body, so that the track rail can be fixed from the upper surface side. By doing so, the mounting workability is improved. The track rail may be a linear rail that extends linearly in the longitudinal direction as described in claim 4, or protrudes in the longitudinal direction on the opposite side to the moving block as described in claim 5. It is good also as a curved rail which curves so that it may be.

According to a sixth aspect of the present invention, the roller guide device according to any one of the first to fifth aspects is turned upside down so that the track rails are orthogonally arranged, and the two block bodies are back-to-back. It is characterized by being integrated into one moving block. Here, the term “integration” includes both a case where two separate moving blocks are integrally connected by a bolt or the like and a case where they are integrally formed of one seamless material. In this way, the moving object can be guided parallel to the two axes with respect to the foundation. If the track rail is a curved rail, the curved motion of the moving block along the longitudinal direction of the track rail is guided by the rolling of the barrel-shaped roller train and the drum-shaped roller train between one of the track rails and the block body, The inclination of the other block body with respect to the other track rail due to this curvilinear movement can be absorbed by the widthwise sliding of the barrel-shaped roller row and the hourglass-shaped roller row between the other block body and the track rail.
As described above, the barrel-shaped roller row and the drum-shaped roller row function not only as a rolling guide but also as an inclination absorbing mechanism.
Since an oblique absorbing mechanism such as an elastic body or a universal joint is not required between the block main bodies, the structure can be simplified, and the maximum load that can be supported by utilizing the load supporting characteristics of the roller can be increased as much as possible. When this curved track rail is used as the building support mechanism of the seismic isolation device, the building moves horizontally along each curved track rail due to the seismic vibration energy of the earthquake. The kinetic energy is converted to potential energy and stops, and it tends to return to the initial position by gravity. After repeating the pendulum motion several times in this way, the robot stops at the lowest point of each track rail. At the time of this pendulum motion, the vibration is attenuated by the frictional resistance of each roller. However, since not only rolling friction but also sliding friction acts, there is also an effect that the vibration damping effect is enhanced. Further, the roller guide device can absorb the misalignment in the two axial directions. That is, the inclination of the block body with respect to one track rail in the width direction is absorbed by an arc-shaped slip along the arc-shaped rail body of one track rail, and the width and width of the block body with respect to the other track rail. Is absorbed by an arc-shaped slip along the arc-shaped rail body of the other track rail.
In the case of this roller guide device, it is preferable to use it for the building support mechanism of the seismic isolation device. That is, unlike a precision machine such as a machine tool, the accuracy of the building and the foundation floor cannot be expected, unlike the precision machine such as a machine tool. As described above, even when the mounting surface is inclined, the first and second barrel-shaped roller rows and the first and second hourglass-shaped roller rows function as a tilt absorbing mechanism like a universal joint.
It moves smoothly regardless of the accuracy of the mounting surface.

According to a seventh aspect of the present invention, at least one of the vertically arranged upper and lower track rails according to the sixth aspect is arranged in parallel, and a moving block is provided at each intersection of the upper and lower track rails. It is characterized by having. With this configuration, the rail can be stably installed on the mating mounting surface, and the assembling becomes easier as compared with a case where the track rails are mounted one by one.

According to an eighth aspect of the present invention, there is provided a table guide device comprising a plurality of the roller guide devices according to any one of the first to fifth aspects arranged in parallel, and guiding the table via the plurality of roller guide devices. It is characterized by the following. This table device is optimal when the mounting accuracy of the two track rails is poor, such as in the case of casting and welding. For example, if there is a deviation in the parallelism between the two track rails, the deviation in the vertical direction is caused by the barrel-shaped roller row and the drum-shaped roller row sliding along the arcs in the width direction on the upper surface and the lower surface of the rail body, and each moving block. Automatic alignment is performed by tilting in the width direction. In addition, when there is a deviation in the parallelism in the left-right direction, each roller shaft of each barrel-shaped roller row and hourglass-shaped roller row is inclined obliquely with respect to a cross-section orthogonal to the longitudinal direction of the width direction arc-shaped rail body. However, since the roller of the present invention is configured in a barrel shape and a drum shape, the edge load acting on the roller end is reduced.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on illustrated embodiments. Embodiment 1 FIG. 1 to 4 show a linear roller guide device according to Embodiment 1 of the present invention. The linear roller guide device 1 includes a track rail 2 and a moving block 3 movably assembled along the track rail 2. The track rail 2 includes a rail body 4 extending linearly along the longitudinal direction, and a base 5 supporting a central portion in the width direction orthogonal to the longitudinal direction of the lower surface of the rail body 4. The widthwise cross-sectional shape of the overhanging portions 41, 41 projecting right and left from the base portion 5 of the portion 4 is formed into an arc shape that is curved so as to protrude toward the base portion 5 side, and the upper surface C1 and the lower surface C2 of each overhanging portion 41, 41 are formed. Are formed in a concentric arc shape. A region corresponding to the base portion 5 at the center in the width direction of the rail body portion 4 is a flat surface.

At the lower end of the base portion 5 of the track rail 2, fixed flange portions 51, 51 projecting left and right are provided, and the left and right upper end portions 42, 42 of the rail main body portion 4 are fixed to the fixed flange portions 51, 51. Located on the same plane parallel to the bottom surfaces 53, 53, and the left and right end portions 43,
43 and left and right end portions 52, 5 of the fixed flange portions 51, 51
2 is located on the same plane perpendicular to the bottom surfaces 53, 53 of the fixed flange portions 51, 51. In this embodiment, the right and left upper ends 42, 42 of the rail body 4 are flat surfaces having a predetermined width, and the left and right ends 43, 43 of the rail body 4 and the left and right ends of the fixed flanges 51, 51 are also provided. Part 5
2 and 52 are also formed by flat surfaces of a predetermined width.

In this way, the cross-sectional shape of the track rail 2 has an I-shaped cross section in which the left and right overhanging portions 41, 41 of the rail main body 4 and the fixing flanges 51, 51 overhang at the upper and lower ends of the base portion 5. Therefore, the section modulus increases, and the bending rigidity increases in both the vertical and horizontal directions. Therefore, high rigidity can be obtained with the minimum material. In addition, by extending the fixed flange portions 51, 51, stability is improved. In addition, the material of the material easily moves to the upper and lower rail main body portions 4 and the fixed flange portions 51, 51 during the drawing process, and the track rail 2 can be easily processed. Also, the upper left and right ends 4 of the rail body 4
2, 42; left and right ends 43, 43; 52, 52 of the rail body portion 4 and the fixed flange portion 51;
Since the bottom surfaces 53, 53 of the rails 1, 51 are located on the four sides of the square, the warp correction of the track rail 2 is performed such that the upper left and right upper ends 42, 42 both ends of the rail main body 4 are located on the same surface. In addition, the side surface may be corrected so that the left and right end portions 43, 43; 52, 52 of the rail body portion 4 and the fixed flange portion 51 are located on the same plane, and the correction work can be easily performed. In the present embodiment, the track rail 2
A bolt hole 54 is provided in the left and right fixing flange portion 51, and the track rail 2 can be fixed to the base 300 using the bolt hole 54. In this way, the work of attaching the track rail 2 can be performed from above the track rail 2, so that workability is good.

The moving block 3 is provided between a block main body 6 facing the upper surface of the rail main body 4 and both left and right ends of the rail main body 4 from both ends in the width direction of the block main body 6. A pair of left and right legs 8, 8 projecting downward across the space 7, and project from the lower ends of the legs 8, toward the center in the width direction of the track rail 2, so that the rail main body 4 projects laterally. And a support piece 9 serving as a hook facing the lower surface of the portion 41. Between the upper surfaces of the left and right overhanging portions 41, 41 of the rail main body 4 and the lower surface of the block main body 6, and in a region corresponding to the base 5, one barrel-shaped roller row 12 is provided in each row.
Are provided so as to be able to roll freely along the longitudinal direction. This barrel-shaped roller row 12 is constituted by a large number of barrel-shaped rollers 13 filled over the entire circulation path provided in the moving block 3. The left and right overhanging portions 4 of the rail body 4
A row of hourglass rollers 21 is interposed between the lower surface 1 and the support piece 9. This drum-shaped roller row 21 is also constituted by a large number of drum-shaped rollers 22 filled over the entire circulation path provided in the moving block 3.

The lower surface of the block body 6 is the rail body 4
And a right and left roller track groove 10 corresponding to the barrel-shaped roller row 12 is provided on a surface of the block main body 6 facing the left and right overhanging portions 41, 41. Is provided. The roller raceway groove 10 has a substantially rectangular cross-section, and a roller rolling surface 14 having an arc-shaped cross section having the same curvature as the curvature of the upper surface C1 of the left and right overhanging portions 41, 41 of the rail body 4 is formed on the upper bottom thereof. . The block main body 6 is provided with a roller escape passage 15 extending linearly in parallel with the roller raceway groove 10. Both ends of the roller raceway groove 10 are provided at both ends of the block main body 6. An end plate 17 having a U-shaped turning path 16 communicating with both ends is fixed.
A roller circulation path is formed from the roller track groove 10 in the load area to the roller escape path 15 in the no-load area.

The upper surface of the support piece 9 of the moving block is formed so as to face the lower surfaces of the left and right overhangs 41, 41 of the rail body 4, and the upper surface of each support piece 9 has a drum-shaped roller row 21 Are provided in one row. Each of the roller raceway grooves 11 has a rectangular cross section, and a roller rolling surface 18 which is convex upward and has the same curvature as the lower surface of the rail main body 4 is formed at a lower bottom thereof. The support piece 9 is provided with a roller escape passage 19 extending linearly alongside each roller raceway groove 11, and further has a U-shaped direction change path 20 communicating the roller raceway groove 11 and the roller escape passage 19. Are formed on the end plate 17,
A roller circulation path is formed from the roller track groove 11 in the load area to the roller escape path 19 in the no-load area.

The barrel-shaped roller 13 has an outer peripheral cross section passing through the center axis of the roller in an arc shape with a bulging central portion, and the radius of curvature of this arc is set to be substantially the same as the upper surface C 1 of the rail main body 4. In particular, the radius of curvature of the arc-shaped outer line cut by a plane passing through the center axis of each barrel-shaped roller 13 is calculated from the radius of curvature of the arc-shaped width-direction cross section of the left and right overhanging portions 41 of the rail main body 4, 41. It is preferable to set it slightly smaller.

By doing so, the center of the barrel-shaped roller 13 of each barrel-shaped roller row 12, 12 comes into contact with the upper surface C1 of the left and right overhanging parts 41, 41 of the rail body 4, and both ends are slightly When a light load is applied, the resistance due to the differential slip is not so large and moves lightly, and when a heavy load such as cutting is applied, the barrel-shaped roller 13 is compressed and the rail body is extended to both ends. By contacting the upper surface of the portion 4, the differential slip increases and the damping property can be enhanced. More specifically, the radius of curvature of the arc-shaped outer line cut along a plane passing through the center axis of the barrel-shaped roller 13 is substantially equal to the radius of curvature of the arc-shaped widthwise cross section of the upper surface of the rail main body 4.
It is desirable to set in the range of 95 to 0.99. With this setting, the differential slip works effectively.

The drum-shaped roller 22 has an outer peripheral cross-section passing through the center axis of the roller in an arc shape with a constricted central portion, and the radius of curvature of this arc is set to be substantially the same as the lower surface C2 of the rail body 4. In this case, the radius of curvature of the arc-shaped outer line cut along the plane passing through the center axis of each hourglass roller 22 is set slightly larger than the radius of curvature of the arc-shaped width-direction cross section of the lower surface C2 of the rail main body 4. Is preferred. Specifically, in accordance with the relationship between the barrel-shaped roller 13 and the upper surface C1 of the rail main body 4, the radius of curvature of the lower circular arc C 2 of the rail main body 4 is a circle cut by a plane passing through the central axis of the hourglass roller 13. The radius of curvature of the arc-shaped outline may be set to be approximately in the range of 0.95 to 0.99, or may be set as appropriate according to the working load conditions.

The contact angle α1 of the barrel roller 13 and the contact angle α2 of the hourglass roller 22 are set according to the conditions of use. The contact angles α1 and α2 are defined as the center of curvature O of the rail main body 4 with respect to a vertical axis V passing through the center of the rail main body 4 and the axial center of the barrel-shaped roller 13 and the hourglass roller 22 (of the hourglass roller). Contact angle lines A1 and A
The angle between 2 For example, in the case of supporting the upper, lower, left, and right loads in a well-balanced manner, as shown in FIG.
Contact angles α1, α2 of barrel roller 13 and hourglass roller 22
Is set to around 45 degrees, and when the load from above is large, as shown in FIG. 1B, the contact angle α1 of the barrel roller 13 is set to an angle smaller than 45 degrees, for example, about 30 degrees. do it.

Further, in the present embodiment, the barrel-shaped roller row 12 is held in series by a flexible roller holding belt 23. As shown in FIG. 4, the roller holding belt 23 has a belt-like belt body 26 in which a substantially barrel-shaped storage hole 24 for holding the barrel-shaped roller 13 is provided at a predetermined pitch via a spacer 25. An end face holding plate 27 provided at a width direction edge of each storage hole 24 of the belt main body 26,
It is composed of An engagement piece 2 that engages with the barrel roller 13 at the hole edge of the storage hole 24 and holds the barrel roller 13.
9 are provided. The roller is such that the end face holding plate 27 is in contact with the roller end face of each barrel-shaped roller 13 and stably holds the axis of each roller in a direction orthogonal to the moving direction of the moving block. An engagement protrusion 28 is provided in the center hole 13a provided in the end face of the shaped roller 13 so as to be rotatably and slidably engaged. The end face holding plate 27 is guided on the inner side wall of the roller raceway groove 10. Center hole 13
a is constituted by a conical hole having a triangular cross section.

The drum-shaped roller row 21 is held in series by a flexible roller holding belt 33. As shown in FIG. 5, the roller holding belt 33 has a substantially drum-shaped storage hole 34 in which the drum roller 22 is held.
Belt-shaped belt body 3 provided at a predetermined pitch through 5
6 and an end face holding plate 37 provided at the widthwise edge of each storage hole 34 of the belt main body 36.
Engagement pieces 39 are provided at the front and rear edges of the storage hole 34 to engage with the hourglass roller 22 and hold the hourglass roller 22. The end face holding plate 37 comes into contact with the end face of the hourglass roller 22 and stably holds the axis of each roller in a direction perpendicular to the moving direction of the moving block. An engagement projection 38 is provided in the center hole 22a provided in the end face of the first projection to slidably engage with the center hole 22a. The end face holding plate 37 is guided by the inner wall of each roller raceway groove 11, maintains the roller axis in a direction perpendicular to the moving direction of the moving block, and sets the roller axis in a direction perpendicular to the moving direction of the moving block. This prevents so-called skew from occurring. The center hole 22a is formed by a conical hole having a triangular cross section. As described above, in the present embodiment, the linear movement of the moving block 3 along the longitudinal direction of the track rail 2 is guided by the rolling of the barrel-shaped roller row 12 and the drum-shaped roller row 21, and the upper surface of the rail main body 4. The movable block 3 can be displaced in an arc shape in the width direction of the rail main body 4 by the sliding of the barrel-shaped roller row 12 and the drum-shaped roller row 21 along the lower surface.

Since the linear roller guide device of the present embodiment uses the barrel-shaped roller row 12 and the hourglass-shaped roller row 21 having higher rigidity than the balls, a linear guide device having high rigidity can be realized. The load from above is supported by the barrel-shaped roller row 11 contacting the upper surface of the rail body 4, and the lifting load from below is supported by the drum-shaped roller row 21 contacting the lower face of the rail body 4. From the load. On the other hand, the linear roller guide device 1 alone has a degree of freedom in the arc direction of the rail body 4. But,
When assembling to a table or the like, the linear roller guide devices 1 are used in pairs or with the linear roller guide device 1 and various linear guide mechanisms of another structure such as another roller or a ball, and the moving block 3 is used as a table or the like. When the guided member is assembled, the moving block 3 cannot move in the arc direction.
Can be supported on one side with respect to the largest diameter portion of the hourglass roller 22 contacting the lower surface arc and the barrel roller 13 contacting the upper surface arc, and can basically support loads in four directions, up, down, left and right.

In particular, by setting the length of the upper two barrel-shaped rollers 12 to be longer, the support rigidity can be further increased. For example, by setting the length of the barrel-shaped roller row 12 in contact with the upper surface of the rail body 4 to about twice the length of the drum-shaped roller 22 on the lower side, the upper row and the lower
Although it is a row configuration, it is also possible to adopt a configuration with an equal load in four directions. Further, since the cross-sectional shape in the width direction of the rail body 4 is an arc shape, the barrel-shaped roller 13 and the hourglass roller 22 slide along the upper and lower arcs of the rail body 4, and the moving block 3 is moved along the rail body. The circular movement is possible about the center of curvature O of the portion 4 by a predetermined angle θ. In other words, it has a degree of freedom in the direction of rotation about the center of curvature O by a predetermined angle. Therefore, even if there is a mounting error between the moving block 3 and the track rail 2, for example, the parallelism between the moving block 3 and the mating mounting surface of the track rail 2 is incorrect, the moving block 3 is moved in accordance with the mounting error. The mounting error is absorbed by the circular movement along 4. Even if the moving block 3 moves in an arc, the contact state of the barrel-shaped roller 13 and the hourglass-shaped roller 22 with the arc-shaped rail main body 4 does not change. Thus, according to the present invention, it is possible to realize a linear roller guide device having high rigidity and self-alignment.

Further, since the barrel-shaped roller 13 and the hourglass-shaped roller 22 are used as rolling elements, the diameter of the cross section orthogonal to the rolling axis of each roller is different at the central portion and at both axial ends. , Their circumferential lengths are different, and differential slip occurs as described above. This differential slip can improve the damping property. Further, the barrel-shaped roller 13
The drum-shaped roller 22 is disposed so as to sandwich the upper and lower surfaces of the left and right overhanging portions 41, 41 overhanging from the base portion of the rail body 4, so that the impact load from above and the impact load from below are overhanged. It can be absorbed by the bending deformation of the parts 41, 41. Therefore, even when an impact load is applied, it is possible to prevent an excessive load from being applied to the contact portion between the barrel-shaped roller 13 and the hourglass roller 22, particularly the edge portion.

Next, a modification of the first embodiment will be described with reference to FIGS. 6 (A) and 6 (B). In the example of FIG. 1, the bolt hole 54 for fixing the track rail 2 is fixed to the fixing flange portion 51.
6A and 6B, the bolt holes 55 for fixing the rails are provided so as to penetrate the base portion 5 vertically. Therefore, the bolt hole 55 is opened in a region corresponding to the base portion 5 on the upper surface of the rail main body 4, and can be more easily fixed from above the track rail 2. The upper opening of the bolt hole 55 is closed by the lid 55a.

Embodiment 2 7 and 8 show a linear roller guide device according to Embodiment 2 of the present invention. In the second embodiment, the two sets of linear roller guides described in the first embodiment are turned upside down, and the track rails 2 and 2 are arranged orthogonally, and the two moving blocks 3 and 3 are aligned back to form an integrated unit. Into one moving block 3A. Here, the term “integration” includes both a case where the two separate moving blocks 3 and 3 are integrally connected with a bolt or the like and a case where they are integrally formed of one seamless material. That is, the linear roller guide device 10
Reference numeral 0 denotes a lower first linear motion guide 100A and an upper second linear motion guide 100B that guides the lower linear motion guide 100A in a direction perpendicular to the first linear motion guide 100A. The configuration of the lower first linear motion guide 100A is exactly the same as that of the first embodiment, and the upper second linear motion guide 100B is different from the lower first linear motion guide 100A. The points are upside down and
The only difference is that the directions of the first and second track rails are orthogonally arranged, and the basic configuration is exactly the same.
The same components as those in the above embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In the second embodiment, the track rail 2 of the first linear motion guide 100A is attached to the base 300 and the like, and the track rail 2 of the second linear motion guide 100B is attached to the moving object. The moving object freely moves in a plane parallel to the base 300. On the other hand, the upper and lower track rails 2, 2 are, as described above, axes passing through the center of curvature O of the arc-shaped widthwise cross section of the upper surface C1 and the lower surface C2 of the left and right overhanging portions 41, 41 of the rail body portions 4, 4. Has a degree of freedom in the rotation direction with respect to the moving block 3A by a predetermined angle with respect to the moving block 3A. Go to The inclination of the mounting surface is caused not only by the assembly error at the time of assembly, but also by the external force at the time of running, and is caused by thermal expansion
Such an error is caused by the protrusions 4 of the rail main body parts 4 and 4.
It can be absorbed by the sliding of the barrel-shaped roller row 12 and the drum-shaped roller row 21 with respect to 1, 41.

Embodiment 3 Next, Embodiment 3 of the present invention
Will be described. FIG. 9 shows a roller guide device according to the third embodiment. The third embodiment has a configuration in which two upper and lower track rails of the second embodiment are respectively arranged in parallel, and are assembled in a cross-girder shape by four moving blocks 3A. Since the configurations of the respective components such as the track rail 2 and the moving block 3A are exactly the same as those in the first and second embodiments, the description of the first and second embodiments will be referred to, and the duplicate description will be omitted. In the drawings, the same reference numerals as those in the first and second embodiments are used. In the illustrated example, the upper two track rails 2, 2
Are connected by a square connecting plate 301, and the lower track rails 2, 2 are also connected by a square connecting plate 302.
Are linked by With a structure having a plurality of track rails 2 as in the third embodiment, the track rails 2 can be stably installed on the mating mounting surface.
Assembling becomes simpler than the case where one track rail is attached. In particular, if the pair of upper and lower track rails 2, 2; 2, 2 are previously assembled in parallel by the connecting plates 301, 302, there is no need to increase the parallelism at the time of attachment, and the assemblability is further improved. In this embodiment, two or more track rails 2 are arranged in parallel at the top and bottom. However, at least one of the upper and lower track rails 2 is arranged in plurals in parallel, and the moving block 3A is connected to the intersection of each of the track rails 2. , Respectively.
For example, among the upper and lower track rails, various configurations such as a configuration in which one is one and the other is two, a configuration in which one is two and the other is three or more, and a configuration in which both are three or more each are used. It is possible to take.

Embodiment 4 FIG. Next, Embodiment 4 of the present invention
Will be described. FIG. 10 shows a table guide device according to Embodiment 3 of the present invention. In this embodiment, the linear roller guide device 1 according to the first embodiment is described.
Are arranged in parallel in two rows in this embodiment.
Table 301 via linear roller guides 1, 1 in a row
It is designed to guide the linear motion of the robot.

That is, two track rails 2, 2 arranged in parallel are fixed to the base 300, and the table 303 is connected so that the moving blocks 3, 3 assembled to these track rails 2, 2 are connected. Has been fixed. Since the linear roller guide device 1 has exactly the same configuration as that of the first embodiment, the same components are denoted by the same reference numerals and description thereof is omitted. The linear roller guide device according to the first embodiment alone is not practical as a conveyance guide, and a table guide device is configured in parallel with the linear roller guide device according to the first embodiment and paired with another guide mechanism. In the fourth embodiment, a pair of linear roller guide devices 1 and 1 of the first embodiment is used.

Fifth Embodiment FIG. 11 shows a roller guide device according to a fifth embodiment. This roller guide device is different from the first embodiment in that the track rail 202 is a curved rail that curves along the longitudinal direction so as to protrude to the opposite side to the moving block 3, and other configurations are different from those of the first embodiment. This is basically the same as the first embodiment. In the following description, only the differences will be described, and the same components will be denoted by the same reference numerals and description thereof will be omitted. That is, the rail body 204 of the track rail 202
Is the lower side along the longitudinal direction (the side opposite to the moving block 3)
A rail body 204 that is curved so as to protrude from the rail body 204; and a base 205 that supports a central portion in the width direction orthogonal to the longitudinal direction of the lower surface of the rail body 204. The cross-sectional shape in the width direction of the projecting portion 41 projecting right and left is lower (the base portion 205
Side) and has an arc shape that curves to protrude,
The upper surface C1 and the lower surface C2 of each overhang portion 41, 41 are formed in a concentric arc shape. Rail body 204
A region corresponding to the base portion 205 on the upper surface is formed into a flat surface. The base portion 205 has a beam shape extending over the entire length along the longitudinal direction of the rail main body portion 4, and has a fixed flange portion 51 extending at the lower end portion in the lateral direction in the width direction. The upper end of the base portion 205 has an arc shape along the arc shape in the longitudinal direction of the rail body portion 204, and
4 is integrally connected to the lower surface. The lower end of the base portion 205 extends linearly, and the fixed flange portion 51 also extends linearly.

For the moving block 3, the roller raceway groove 10 and the roller rolling surface 14 of the barrel-shaped roller row 12 provided on the lower surface of the block main body 6, and the hourglass roller provided on the upper surface of the support piece 9. The roller raceway groove 11 and the roller rolling surface 18 of the row 21 are curved so as to protrude downward along the longitudinal direction of the rail main body 204 corresponding to the rail main body 204. Since the roller rolling surface 14 of the barrel-shaped roller row 12 and the roller rolling face 18 of the drum-shaped roller row 21 are inclined right and left, strictly speaking, both left and right end portions of the barrel-shaped roller row 12 and the drum-shaped roller row 21 Is different, but the radius of curvature R of the curvature of the rail body 204 in the longitudinal direction is small in the drawings for easy understanding.
Actually, since the distance is as large as several meters, the influence of the difference in the moving distance is very small.
There is no effect on rolling, and rolling transition is smooth.

Embodiment 6 FIG. 12 shows a roller guide device according to Embodiment 6 of the present invention. The sixth embodiment is different from the fifth embodiment in that two sets of the roller guide devices according to the fifth embodiment are turned upside down, and
Are arranged orthogonally, and the two moving blocks 203, 203 are integrated back to back to form one moving block 203A.
It is what it was. Here, the term “integration” includes both a case where the two separate moving blocks 203 are integrally connected with bolts or the like and a case where they are integrally formed of one seamless material. That is, the roller guide device 200 includes a lower first motion guide portion 200A, and an upper second motion guide portion 200B that guides the lower first motion guide portion 200A in a direction orthogonal to the lower first motion guide portion 200A. ing. The configuration of the lower first motion guide 200A is exactly the same as that of the first embodiment, and the upper second motion guide 200B is different from the lower first motion guide 200A in that: The basic configuration is exactly the same except that the arrangement is upside down and the pair of track rails 202 is orthogonal. The same components are denoted by the same reference numerals, and description thereof will be omitted.

In particular, in the present embodiment, when used as a building support mechanism of the seismic isolation device, one track rail 202 is fixed to a foundation floor (not shown), and a building is mounted on the other track rail 202. Fixed. Then, the rail body 20 on which the buildings are arranged vertically by the vibration energy of the earthquake
4, 204, but the track rails 202, 202 have an arc shape that curves up and down, so that the building is lifted upward as it moves in the vibration direction from the lowest point. The kinetic energy is converted to potential energy, stops, and tries to return to the initial position by gravity. After repeating the pendulum movement several times like this,
It stops at the lowest point of the track rails 102 and 202. Also in this embodiment, similarly to the conventional example shown in FIG. 11, the building is supported on the foundation floor by the plurality of inclined absorption type curved roller guide devices 100, and the horizontal posture is maintained. The building makes a curved movement along each of the track rails 202,202. The movement along the longitudinal direction of one track rail 202 of the moving block 203A is guided by the rolling of the barrel-shaped roller row 12 and the drum-shaped roller row 21. As the moving block 203A moves along the first track 1 rail 202, the moving block 203A inclines. On the other hand, since the track rail 202 fixed to the building maintains a horizontal state, the moving block 203A is inclined with respect to the track rail 202. This inclination is absorbed by the sliding of the barrel-shaped roller row 12 and the hourglass-shaped roller row 21 along the arc surface in the width direction with respect to the rail main body 204. Vibration energy is also absorbed by the kinetic frictional resistance of each roller during the curved movement of the building.
In the case of the present embodiment, for example,
When 3A moves along the longitudinal direction of one track rail 202, the rolling friction between the barrel-shaped roller row 12 and the drum-shaped roller row 21 and the rail body of the barrel-shaped roller row 12 and the drum-shaped roller row 21 are increased. Sliding friction along the arc surface in the width direction acts on 204. Also, when the moving block 203A moves along the longitudinal direction of the other track rail 202, the rolling friction between the other barrel-shaped roller row 12 and the hourglass-shaped roller row 21 and the movement of the other barrel-shaped roller row 12 and the hourglass-shaped Sliding friction is exerted on one of the rail main bodies 204 of the roller row 21 along an arc surface in the width direction. As described above, when the moving block 203A moves, not only the rolling friction of each roller but also the sliding friction acts, so that the effect of increasing the vibration damping effect can be obtained.

Embodiment 7 Next, Embodiment 7 of the present invention
Will be described. FIG. 13 shows a roller guide device according to the seventh embodiment. The seventh embodiment has a configuration in which two upper and lower track rails of the fifth embodiment are arranged in parallel with each other, and are assembled in a girder shape by four moving blocks 203A. The configurations of the respective components such as the track rail 202 and the moving block 203A are completely the same as those of the above-described fifth and sixth embodiments. Therefore, the description of the fifth and sixth embodiments will be referred to, and redundant description will be omitted. In the figure, the fifth and sixth embodiments are shown.
The same reference numerals are used. In the illustrated example, the upper two track rails 202, 202 are square connection plates 301.
The lower track rails 202 are also connected by a square connection plate 302. If a structure having a plurality of track rails 2 as in the third embodiment can be stably installed on the mating mounting surface, a case where one track rail is mounted as in the sixth embodiment It is easier to assemble.
In particular, a pair of upper and lower track rails 202, 202;
If the members 2 and 202 are assembled in parallel by the connecting plates 301 and 302 in advance, there is no need to increase the parallelism at the time of attachment, and the assembling property is further improved. In this embodiment, two or more track rails 202 are arranged in parallel at the top and bottom. However, at least one of the upper and lower track rails 202 is arranged in plurals in parallel, and the moving block 203A
May be provided at the intersections of the respective track rails 202. For example, among the upper and lower track rails, various configurations such as a configuration in which one is one and the other is two, a configuration in which one is two and the other is three or more, and a configuration in which both are three or more each are used. It is possible to take.

Embodiment 8 FIG. Next, Embodiment 8 of the present invention
Will be described. FIG. 14 shows a table guide device according to Embodiment 8 of the present invention. In this embodiment, a plurality of the curved roller guide devices described in the fifth embodiment are arranged in two rows in this embodiment, and the table 301 is arranged via the two rows of linear roller guide devices 1 and 1. It is designed to guide linear motion.

That is, two track rails 2, 2 arranged in parallel are fixed to the base 302, and the table 301 is connected so as to connect the moving blocks 3, 3 assembled to these track rails 2, 2. Has been fixed. Since the linear roller guide device 1 has exactly the same configuration as that of the first embodiment, the same components are denoted by the same reference numerals and description thereof is omitted. The linear roller guide device according to the first embodiment alone is not practical as a conveyance guide, and a table guide device is configured in parallel with the linear roller guide device according to the first embodiment and paired with another guide mechanism. In the fourth embodiment, a pair of linear roller guide devices 1 and 1 of the first embodiment is used.

[0040]

As described above, according to the first aspect of the present invention, since the barrel-shaped roller row and the drum-shaped roller row are used, the roller guide having higher rigidity as compared with the case using balls is used. The device can be realized. Loads from above are supported by a row of barrel-shaped rollers that contact the upper surface of the rail body, and lifting loads from below are supported by a row of drum-shaped rollers that contact the lower surface of the rail body, supporting loads from both upper and lower directions. can do. Further, since the cross-sectional shape in the width direction of the rail main body portion is an arc shape, the barrel roller and the hourglass roller slide along the upper and lower circular arcs of the rail main body portion, and the moving block can move in an arc. Therefore, even if there is a mounting error between the moving block and the track rail, for example, the parallelism between the mating mounting surfaces of the moving block and the track rail is incorrect, the moving block moves along the rail body in accordance with the mounting error. The mounting error is absorbed. Even if the moving block moves in an arc, the contact state of the barrel-shaped roller and the hourglass roller with the arc-shaped rail main body does not change. Further, when an impact load is applied, the left and right overhanging portions of the rail main body are elastically deformed to absorb the impact load, and no excessive stress is applied to the ends of the barrel roller and the hourglass roller. As described above, according to the present invention, it is possible to realize a linear roller guide device having high rigidity, self-alignment, and excellent impact resistance. In addition, the barrel-shaped roller and the drum-shaped roller as rolling elements have different diameters at a cross section perpendicular to the center axis of each roller at the center portion and at both end portions in the axial direction. However, differential slip occurs during rolling. Damping can be provided by this differential slip. The roller guide device alone has a degree of freedom along the arc shape in the width direction of the rail main body, and therefore cannot support the lateral load. However, when assembling to a table or the like, the roller guide devices are used together, or the roller guide device and a pair of other rolling guide mechanisms of different structures such as rollers and balls are used in pairs, and the moving block is guided by a table or the like. Since the moving block cannot move in the arc direction in a state where the members are assembled, the moving block can also support a lateral load, and can basically support loads in four directions, up, down, left and right.

According to a second aspect of the present invention, the radius of curvature of the arc-shaped external line cut by a plane passing through the center axis of the barrel-shaped roller is determined by the curvature of the arc-shaped widthwise cross section of the upper surface of the left and right overhanging portions of the rail main body. By setting it slightly smaller than the radius, the center of the barrel roller comes into contact with the upper surface of the overhanging part of the rail main body, and both ends are slightly lifted up. Resistance is not so large, it moves lightly, and when heavy load such as cutting is applied, the barrel roller is compressed and contacts the top of the rail body over the entire length up to both ends, increasing the differential slip and increasing damping be able to.

According to the third aspect of the present invention, a rail fixing bolt hole is opened in a region corresponding to the base on the upper surface of the rail main body, and the track rail can be fixed from the upper surface side, so that mounting workability is improved. Is improved.

According to a sixth aspect of the present invention, the roller guide device according to any one of the first to fourth aspects is turned upside down so that the track rails are orthogonally arranged, and the two block main bodies are integrated back to back to form one movement. By using the blocks, the moving object can be guided in parallel to the two axes with respect to the foundation.

In particular, if the track rail is a curved rail, the curved movement of the moving block along the length of the track rail is caused by the rotation of the barrel-shaped roller row and the drum-shaped roller row between one track rail and the block body. The inclination of the other block body with respect to the other track rail due to this curved motion is absorbed by the widthwise sliding of the barrel-shaped roller row and the hourglass-shaped roller row between the other block body and the track rail. can do. As described above, the barrel-shaped roller row and the drum-shaped roller row function not only as a rolling guide but also as a tilt absorbing mechanism, so that a tilt absorbing mechanism such as an elastic body or a universal joint is not required between the block main bodies, and the structure is simplified. And the maximum load that can be supported by utilizing the load supporting characteristics of the roller can be made as large as possible. When this curved track rail is used as the building support mechanism of the seismic isolation device, the building moves horizontally along each curved track rail due to the seismic vibration energy of the earthquake. The kinetic energy is converted to potential energy and stops, and it tends to return to the initial position by gravity. After repeating the pendulum motion several times in this way, the robot stops at the lowest point of each track rail. At the time of this pendulum motion, the vibration is attenuated by the frictional resistance of each roller. However, since not only rolling friction but also sliding friction acts, there is also an effect that the vibration damping effect is enhanced.

This roller guide device can absorb misalignment in two axial directions. That is, the inclination of the block body with respect to one track rail in the width direction is absorbed by an arc-shaped slip along the arc-shaped rail body of one track rail, and the width and width of the block body with respect to the other track rail. Is absorbed by an arc-shaped slip along the arc-shaped rail body of the other track rail. In the case of this roller guide device, it is preferable to use it for the building support mechanism of the seismic isolation device. That is, unlike a precision machine such as a machine tool, the accuracy of the building and the foundation floor cannot be expected, unlike the precision machine such as a machine tool. As described above, even when the mounting surface is inclined, the first and second barrel-shaped roller rows and the first and second barrel-shaped rollers can be used.
Since the hourglass roller row functions as a tilt absorbing mechanism like a universal joint, it moves smoothly regardless of the accuracy of the mounting surface.

According to a seventh aspect of the present invention, at least one of the upper and lower track rails arranged orthogonally according to the sixth aspect is arranged in parallel, and a moving block is provided at each intersection of the upper and lower track rails. As a result, it can be stably installed on the mating mounting surface, and the assembling becomes easier as compared with the case where the track rails are mounted one by one.

According to an eighth aspect of the present invention, there is provided a table guide device having a plurality of the roller guide devices according to any one of the first to fifth aspects arranged in parallel, and guiding the table via the plurality of roller guide devices. This is optimal when the mounting accuracy of the two track rails is poor. For example, if there is a deviation in the parallelism between the two track rails, the deviation in the vertical direction is caused by the barrel-shaped roller row and the drum-shaped roller row sliding along the arcs in the width direction on the upper surface and the lower surface of the rail body, and each moving block. Automatic alignment is performed by tilting in the width direction. In addition, when there is a deviation in the parallelism in the left-right direction, each roller shaft of each barrel-shaped roller row and hourglass-shaped roller row is inclined obliquely with respect to a cross-section orthogonal to the longitudinal direction of the width direction arc-shaped rail body. But
Since the roller according to the present invention is formed in a barrel shape and a drum shape, the edge load is reduced because the edge is not sharp as in the cylindrical roller.

[Brief description of the drawings]

FIG. 1A is a front vertical sectional view of a roller guide device according to Embodiment 1 of the present invention, and FIG. 1B is a view showing a modification of FIG. 1A.

2 (A) is a schematic perspective view of the apparatus of FIG. 1 (A), and FIG. 2 (B) shows a moving block of the apparatus of FIG. 1 (A);
It is the side view shown in the section which meets the I-II line.

3 (A) is a front view of the apparatus of FIG. 1, FIG. 3 (B) is a plan view of the apparatus of FIG. 1, and FIG. 3 (C) is a side view of the apparatus of FIG.

FIGS. 4A and 4B show a holding belt of a barrel-shaped roller of the apparatus shown in FIG. 1, wherein FIG. 4A is a front view, FIG. 4B is a plan view, and FIG. (A) is a cross-sectional view taken along line CC, and (D) is a side view of (B).

5 shows a holding belt for the hourglass roller of the apparatus shown in FIG. 1, wherein FIG. 5 (A) is a front view, FIG. 5 (B) is a plan view, and FIG. (A) is a cross-sectional view taken along line CC, and (D) is a side view of (B).

6 (A) is a view showing a modification of the track rail fixing position of FIG. 1 (A), and FIG. 6 (B) is a view showing a modification of the track rail fixing position of FIG. 1 (B). It is.

FIG. 7 is a partially broken front view of a roller guide device according to Embodiment 2 of the present invention.

FIG. 8 is a plan view of the apparatus of FIG. 7;

FIG. 9 shows a roller guide device according to Embodiment 3 of the present invention. FIG. 9 (A) is a plan view showing an upper connecting plate removed, FIG. 9 (B) is a front view, FIG. 3C is a side view.

FIGS. 10A and 10B show a table guide apparatus according to Embodiment 4 of the present invention, wherein FIG. 10A is a plan view and FIG. 10B is a side view.

11 (A) is a front vertical sectional view of a roller guide device according to Embodiment 5 of the present invention, and FIG. 11 (B) is a diagram showing a moving block of the device of FIG. It is the side view shown by the cross section along.

FIG. 12 is a partially cutaway front view of a roller guide device according to Embodiment 6 of the present invention.

FIG. 13 shows a roller guide device according to Embodiment 7 of the present invention. FIG. 13 (A) is a plan view showing an upper connecting plate removed, FIG. 13 (B) is a front view, FIG. 3C is a side view.

FIGS. 14A and 14B show a table guide device according to an eighth embodiment of the present invention, wherein FIG. 14A is a plan view and FIG. 14B is a side view.

FIG. 15 is a schematic view showing an example of a state of use of a conventional curved roller guide device with a tilting mechanism.

FIG. 16 is a schematic view showing an example of a conventional roller guide device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roller guide device 2,202 Track rail 3,3A Moving block 4,204 Rail body part, 1st, 2nd rail body part 41 Left and right overhang part 5,205 Base part, 1st, 2nd base part 6 Block body part 7 Space 8 Leg 9 Supporting piece 10 Roller track groove 11 Roller track groove 12 Barrel roller row 13 Barrel roller 14 Roller rolling surface 15 Roller escape hole 16 Direction change path 17 End plate 18 Roller rolling surface 19 Roller relief Hole 20 Turning path 21 Hour-shaped roller row 22 Hour-shaped roller 23 Roller holding belt

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 3J104 AA03 AA19 AA26 AA27 AA36 AA64 AA69 AA74 AA76 BA01 BA21 DA13

Claims (8)

[Claims] 1. A rail body extending in a longitudinal direction, and a base supporting a central portion in the width direction of the rail body, and a width direction of an overhanging portion projecting right and left from the base of the rail body. A track rail having a cross-sectional shape that is curved so as to protrude toward the base portion side, and an upper surface and a lower surface of each overhang portion having a concentric circular arc shape; and a block body portion facing the upper surface of the rail body portion. ,
A pair of left and right legs protruding downward from both ends in the width direction of the block body, and a support protruding from the legs toward the center in the width direction of the track rail and facing the lower surface of the left and right overhanging portion of the rail body. And a plurality of barrel-shaped rollers that are rotatably interposed between the block main body and the upper surfaces of the projecting portions of the rail main body along the longitudinal direction of the rail main body. And a plurality of barrel-shaped rollers arranged between the left and right support pieces of the block body and the lower surfaces of the left and right overhangs of the rail body along the longitudinal direction of the rail body. A roller guide device comprising: 2. The radius of curvature of an arc-shaped outer line cut along a plane passing through the center axis of a barrel-shaped roller is set slightly smaller than the radius of curvature of an arc-shaped width-direction cross section of the upper surface of the left and right overhanging portions of the rail main body. The roller guide device according to claim 1, wherein: 3. A rail fixing bolt hole is opened in a region corresponding to the base on the upper surface of the rail main body, so that the track rail can be fixed from the upper surface side.
Or the roller guide device according to 2. 4. The roller guide device according to claim 1, wherein the track rail is a linear rail extending linearly in the longitudinal direction. 5. The roller guide device according to claim 1, wherein the track rail is a curved rail that curves along the longitudinal direction so as to protrude to a side opposite to the moving block. 6. A moving block, wherein the roller guide device according to any one of claims 1 to 5 is turned upside down so that each track rail is orthogonally arranged, and two block main bodies are integrated back to back to form one moving block. A roller guide device, characterized in that: 7. A method according to claim 6, wherein at least one of the upper and lower track rails arranged orthogonally is arranged in parallel, and a moving block is provided at each intersection of the upper and lower track rails. Roller guide device. 8. A table guide device comprising a plurality of roller guide devices according to any one of claims 1 to 5, arranged in parallel, and guiding the table via the plurality of roller guide devices. .