JP3404625B2 - Roller guide device and table guide device - Google Patents

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, a seismic isolation device for buildings, and the like, 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 geometrically less strained against a compressive load and has a higher pressure resistance than a ball. Therefore, a roller is used rather than a ball for supporting a heavy load. It is advantageous to do As such a roller guide device, for example, as shown in FIG. 17 , cylindrical rollers 512 and 512 are arranged on the upper surface and the lower surface of a shoulder portion 511 of a track rail 510, and a moving block is provided via the rollers 512 and 512. A configuration in which 513 is rolled and guided along the track rail 510 can be considered.

[0003]

However, unlike the ball, the roller 512 does not have the self-aligning property. Therefore, due to an installation error or the like, the base on which the track rail 510 is attached as shown by the chain double-dashed line in the figure. A platform 514,
Guided member 515 to which moving block 513 is attached
If the parallelism is poor, excessive stress may be generated at the left and right ends of the roller 512, and the roller 512 and the raceway surface may be damaged. Even if it is not damaged, there is a problem that it is easily worn and durability is deteriorated. Even if the roller 512 is mounted with high accuracy, if the impact load acts, the roller 512
Excessive stress may be applied to the left and right ends of the.

On the other hand, the linear guide device is intended to guide lightly by making the sliding resistance as small as possible. However, in recent machine tools, as the speed has been increased, the sliding resistance is small. There is a problem that vibration etc. at the time of cutting becomes large and adversely affects machining accuracy. As a countermeasure against this, in the case of a rolling guide device using balls, the differential slip caused by the difference in ball diameter between the center and the peripheral portion of the contact portion is positively used to improve the damping property. (See, for example, JP-A-7-35136). However, in the case where the cylindrical roller 512 described above is used, since the diameter is the same at any position in the length direction of the roller 512, differential slip cannot be utilized and the damping property cannot be sufficiently enhanced. was there. Further, conventionally, as shown in FIG. 16, the roller guide device used in seismic isolation device, such as a building 501 is also known. That is,
A first track rail 504 fixed to the foundation 502 and curved so as to project downward, and the first track rail 504.
A second track rail 505 which is provided above the above so as to be orthogonal to the first track rail 504 and is fixed to the building 500,
A first moving block 50 movably assembled to the upper surface of the first track rail 504 via a roller row (not shown).
3 and a second moving block 5 movably assembled to 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
Inclination absorption mechanism 50 for connecting 06 and absorbing relative inclination
7 is provided. First moving block 5
When 03 is moved from the lowest point of the first track rail 504 in the longitudinal direction, the inclination angle of the upper surface of the first moving block 503 in the longitudinal direction changes, while the building 50
Since the second track rail 505 fixed to 0 moves in a curved state in the horizontal state, the lower surface of the second moving block 506 also remains in the horizontal state. The second moving block 5 as it is
06 or the second track rail 505 may be damaged due to excessive stress, or the first moving block 503 may not move. Therefore, the tilt absorbing mechanism 507 has conventionally been used to
It was designed to absorb the inclination between the moving blocks 503 and 506. As the tilt absorbing mechanism 507, conventionally, an elastic body is interposed to absorb the tilt by elastic deformation, and a universal joint has been used. However, when an elastic body is used as the tilt 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. In addition, the tilt absorption mechanism 50
Even when a universal joint is used as No. 7, since the maximum load that can be supported depends on the universal joint, there is a problem that the high load supporting ability of the roller guide cannot be utilized and the structure becomes complicated.

The present invention has been made in order to solve the above-mentioned problems of the prior art. The object of the present invention is to use a roller having a rigidity higher than that of a ball, and moreover, it is excellent in self-centering. An object of the present invention is to provide a roller guide device and a table guide device that also have damping properties. Further, when applied to a seismic isolation device or the like, the inclination of the roller can be absorbed by the slippage of the roller so that the inclination absorbing mechanism is unnecessary.

[0006]

In order to achieve the above object, the invention according to claim 1 is directed to a rail main body extending in the longitudinal direction, and a width direction orthogonal to the longitudinal direction of the lower surface of the rail main body. A rail body that has a base portion that supports a central portion, and has a cross-sectional shape in a width direction of the rail body portion that is curved so as to project downward, and a rail body that separates the upper surface arc of the rail body portion from the base portion. Part of the left and right halves of the lower part of the lower part of the lower part of the circular arc concentric circular rail, a block main body facing the upper surface of the rail main body, a pair of left and right protruding downward from the widthwise both ends of the block main body A moving block including a leg portion and a support piece portion that protrudes from the leg portion toward the center side in the width direction of the track rail and faces the lower surface of the left and right half portions of the rail body portion; and the block body portion. On the rail body A row of barrel-shaped roller rows formed by a large number of barrel-shaped rollers that are rotatably interposed in the region corresponding to the base portion along the longitudinal direction of the rail main body portion, and the rail. A drum-shaped roller array composed of a large number of drum-shaped rollers interposed between the left and right support pieces of the main body and the lower surfaces of the left and right halves of the rail main body so as to be rotatable along the longitudinal direction of the rail main body. And are provided.

Since this linear roller guide device uses the barrel-shaped roller train and the hourglass-shaped roller train, it is possible to realize a linear guide device having high rigidity as compared with the case where balls are used. In addition, the load from above is supported by the barrel roller row that contacts the top surface of the rail body, and the floating load from below is supported by the hourglass roller row that contacts the bottom surface of the rail body, supporting the load from both upper and lower directions. You can do it. On the other hand, this linear roller guide unit alone has a degree of freedom in the arc direction of the rail body. However, when it is mounted on a table or the like, the linear roller guide devices are used in pairs or with the linear roller guide device and a pair of various linear guide mechanisms of different structures such as different rollers or balls, and the moving block is mounted on the table or the like. Since the moving block cannot move in the arc direction when the guide member is assembled, even in the lateral load, it is supported at one side part with respect to the maximum diameter part of the hourglass roller and the barrel roller that come into contact with the lower surface arc of the rail body part. Therefore, it is possible to basically support the load in four directions of up, down, left and right.

Further, since the cross-sectional shape of the rail main body in the width direction is arcuate, the barrel roller and the hourglass roller slide along the upper and lower arcs of the rail main body,
The moving block can move in a circular arc. Therefore, even if there is a mounting error between the moving block and the track rail, such as a deviation in the parallelism between the moving block and the mating mounting surface of the track rail, the moving block moves in an arc along the rail body according to this mounting error. Then, the mounting error is absorbed. Further, even if the moving block moves in an arc, the contact state of the barrel roller and the hourglass roller with the arc-shaped rail main body does not change. As described above, according to the present invention, it is possible to realize a linear roller guide device having high rigidity and self-aligning property.

Further, since the barrel-shaped roller and the hourglass-shaped roller as rolling elements have different diameters in the cross section orthogonal to the central axis of each roller at the central portion and at both axial end portions, a circle is formed at the axial position. Circumferential length is different and differential slip occurs during rolling. Damping can be provided by this differential slip.

According to a second aspect of the present invention, the radius of curvature of an arcuate contour line cut along a plane passing through the center axis of the barrel roller is calculated from the radius of curvature of the arcuate width-direction cross section of the upper surface of the rail main body. It is characterized by being set slightly smaller. By doing this, the center of the barrel roller comes into contact with the upper surface of the rail body, and both ends are slightly raised, and the resistance due to differential slip is not so great while a light load is applied. When a heavy load is applied during cutting, the barrel roller is compressed and comes into contact with the upper surface of the rail main body over the entire length up to both ends, so that the differential slip is increased and the damping property can be enhanced. For example, the radius of curvature of an arcuate contour line cut along a plane passing through the center axis of the barrel roller is set within a range of approximately 0.95 to 0.99 of the radius of curvature of the arcuate width-direction cross section of the rail body upper surface. It is preferable to set. With this setting, differential slip effectively acts.

According to a third aspect of the present invention, a fixing flange portion is provided at the lower end portion of the base portion of the track rail so as to project to the left and right,
The left and right upper ends of the rail main body are located on the same plane parallel to the bottom surface of the fixed flange portion, and further, the left and right end portions of the rail main body portion and the left and right end portions of the fixed flange portion are placed on the bottom surface of the fixed flange portion. It is characterized in that they are located on the same plane at a right angle. By doing so, the cross-sectional shape of the track rail becomes an I-shaped cross-section in which the rail main body portion and the fixing flanges project to the left and right at the upper and lower ends of the base portion, so that the cross-section coefficient is large and the vertical and horizontal directions are large. Flexural rigidity increases. Therefore, a large rigidity can be obtained with the minimum material. Further, the stability is improved by projecting the fixed flange portion. In addition, the material of the material is likely to be plastically deformed in the upper and lower rail body portions and the fixed flange portion during the drawing process or the like, and the track rail can be easily processed. Since the left and right upper ends of the rail main body, the left and right ends of the rail main body and the fixed flange, and the bottom of the fixed flange are located on the four sides of the quadrangle, the warp correction of the track rail is The right and left ends may be located on the same plane, and the side surfaces may be straightened so that the left and right ends of the rail body and the fixing flange are located on the same plane, which facilitates the straightening work.

The invention according to claim 4 is characterized in that a bolt hole opening to the bottom surface of the base portion is provided to fix the track rail from below. Since the center of the upper surface of the rail main body is the roller rolling surface of the barrel-shaped roller row and the bolt hole for mounting cannot be opened, the bolt hole is opened and fixed on the bottom surface of the base portion. The invention according to claim 5 is characterized in that the fixing flange portion is provided with a hole for inserting a bolt so that the track rail can be fixed from above. By providing a hole in the fixing flange portion, the fixing can be performed from above. The invention according to claim 6 is characterized in that the fixing flange portion can be fixed from above via a separate pressing tool. By using the retainer in this manner, the track rail can be fixed from above.

According to a seventh aspect of the present invention, at least the barrel-shaped roller of the barrel-shaped roller and the hourglass-shaped roller is hollow,
It is characterized in that the compressive load from the upper side can be absorbed by the compressive deformation of the barrel-shaped roller, while the impact load from the lower side can be absorbed by the bending deformation of the left and right halves protruding from the base portion of the rail main body. By doing so, it is possible to prevent an excessive load from being applied to the contact portions of the barrel roller and the hourglass roller. The track rail may be a linear rail that linearly extends in the longitudinal direction as described in claim 8, or may protrude in the opposite side to the moving block along the longitudinal direction as described in claim 9. It may be a curved rail that is curved so as to move.

The invention according to claim 10 relates to claims 1 to 5.
The roller guide device according to any one of the above items 1 and 2 is turned upside down, the track rails are arranged orthogonally, and the two block main bodies are integrated so as to be back-to-back into one moving block. Here, the term “integrated” refers to the case where two separate moving blocks are integrally coupled by a bolt or the like,
Includes both cases where it is integrally molded from one seamless material. By doing so, the moving object can be guided parallel to the biaxial direction with respect to the foundation. When the track rail is a curved rail, the curving motion along the longitudinal direction of the track rail of the moving block is guided by the rolling of the barrel roller row and the hourglass roller row between one track rail and the block main body, The inclination of the other block main body with respect to the other track rail due to this curvilinear motion can be absorbed by the sliding in the width direction of the barrel roller array and the hourglass roller array between the other block main body and the track rail. In this way, the barrel-shaped roller array and the hourglass-shaped roller array function not only as rolling guides but also as tilt absorbing mechanisms, so there is no need for an elastic absorbing mechanism such as an elastic body or universal joint between the block main body parts, and the structure is simple. In addition, the maximum load that can be supported can be increased as much as possible by utilizing the load supporting characteristics of the roller. When this curved track rail is used as a building support mechanism for a seismic isolation device, the building moves horizontally along each curved track rail due to the seismic energy of the earthquake, but from the lowest point to the longitudinal direction. As the position increases as it moves to, the kinetic energy is converted into potential energy and stops, and gravity tends to return to the initial position. After repeating the pendulum motion several times in this way, it stops at the lowest point of each track rail.
During this pendulum movement, the vibration is damped by the frictional resistance of each roller, but not only rolling friction but also sliding friction acts, so that there is also an effect that the vibration damping effect is enhanced. Further, this roller guide device can absorb misalignment in the two axis directions. That is, the lateral inclination of the block main body part with respect to one track rail in the width direction is absorbed by the arc-shaped slide along the arc-shaped rail body part of one track rail, and the lateral direction of the block body part with respect to the other track rail in the width direction. Is absorbed by the arc-shaped slide along the arc-shaped rail body of the other track rail. In the case of this roller guide device, it is suitable 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 a building and a foundation floor cannot be expected to be completely different. In this way, even if the mounting surface is tilted, the first and second barrel roller rows and the first and second drum-shaped roller rows function as a tilt absorbing mechanism like a universal joint. It moves smoothly regardless.

According to an eleventh aspect of the invention, a plurality of at least one of the vertically arranged upper and lower track rails according to the tenth aspect are arranged in parallel, and moving blocks are respectively provided at intersections of the upper and lower track rails. It is characterized by that. By doing so, it is possible to stably install 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 a twelfth aspect of the table guide apparatus, a plurality of roller guide apparatuses according to any one of the first to ninth aspects are arranged in parallel, and the table is guided through the plurality of roller guide apparatuses. It is characterized by This table device is optimal when the mounting accuracy of the two track rails is poor, as in the case of casting molding or welding structure. For example, when there is a deviation in the parallelism between the two track rails, the deviation in the vertical direction means that the barrel-shaped roller row and the hourglass-shaped roller row slide along the arcs in the width direction of the upper surface and the lower surface of the rail main body. The center is automatically adjusted by inclining in the width direction. Also, if there is a deviation in the parallelism in the left-right direction, the roller shafts of each barrel roller row and hourglass roller row should be inclined with respect to the cross section orthogonal to the longitudinal direction of the rail main body that is arcuate in the width direction. However, since the roller of the present invention is formed in the barrel shape and the hourglass shape, the edge load (extreme excessive load) acting on the roller end portion is alleviated.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below based on the embodiments shown in the drawings. Embodiment 1. 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 that is movably assembled along the track rail 2. The track rail 2 includes a rail main body portion 4 that linearly extends in the longitudinal direction, and a base portion 5 that supports a widthwise central portion of the lower surface of the rail main body portion that is orthogonal to the longitudinal direction. 4 has an arcuate shape which is curved so as to project downward, and an arc C1 of the upper surface and an arc C2 of the lower surfaces of the left and right halves that separate the base portion 5 are concentric with the center of curvature O as the center. Has been done.

Fixed flange portions 51, 51 are provided at the lower end portion of the base portion 5 of the track rail 2 so as to project to the left and right, and the left and right upper end portions 42, 42 of the rail main body portion 4 are provided with the fixed flange portions 51, 51. Located on the same plane as the bottom surfaces 53, 53, and further on the left and right end portions 43 of the rail main body portion 4,
43 and the left and right end portions 52, 5 of the fixed flange portions 51, 51
2 is located on the same plane at right angles to the bottom surfaces 53, 53 of the fixed flange portions 51, 51. In this embodiment, the left and right upper end portions 42, 42 of the rail main body portion 4 are flat surfaces with a predetermined width, and the left and right end portions 43, 43 of the rail main body portion 4 and the left and right end portions of the fixed flange portions 51, 51 are both. Part 5
2, 52 are also formed by flat surfaces having a predetermined width.

In this way, the cross-sectional shape of the track rail 2 is such that the left and right halves 41, 41 of the rail main body 4 and the fixing flanges 51, 51 project left and right 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 direction and the horizontal direction. Therefore, a large rigidity can be obtained with the minimum material. Moreover, the stability is improved by projecting the fixed flange portions 51, 51. In addition, the material of the material, such as the upper and lower rail body portions 4 and the fixed flange portions 5, is removed during the drawing process.
1,51 can be easily plastically deformed and the track rail 2 can be easily processed. Further, the left and right upper end portions 42, 4 of the rail body portion 4 are
2, left and right side end portions 43, 43; 52, 52 of the rail body portion 4 and the fixed flange portion 51, the fixed flange portions 51, 5
Since the bottom surfaces 53 of the 1 are located on the four sides of the quadrangle,
The warp correction of the track rail 2 is performed so that the left and right upper end portions 42, 42 of the rail body portion 4 are located on the same plane on the upper surface and the left and right end portions of the rail body portion 4 and the fixed flange portion 51 are on the side surface. It suffices to correct so that 43, 43; 52, 52 are located on the same plane, and the correction work can be facilitated. Further, in the present embodiment, bolt holes 54 that open to the bottom surface of the base portion 5 are provided, and the track rail 2 is configured to be fixed from below.

The moving block 3 has a predetermined space between the block main body 6 facing the upper surface of the rail main body 4 and both widthwise end portions of the block main body portion 6 to the left and right end portions of the rail main body portion 4. A pair of left and right leg portions 8 and 8 that protrude downward with a space 7 in between, and left and right halves of the rail main body portion 4 that protrude from the lower end portions of the leg portions 8 and 8 toward the center in the width direction of the track rail 2. The support pieces 9 and 9 are hook portions facing the lower surfaces of the portions 41 and 41. Roller track grooves extending in the longitudinal direction are provided on the surface of the block body 6 facing the upper surface of the rail body 4 and the surface of the supporting piece 9 facing the left and right half portions 41, 41 of the rail body 4 respectively. 10 and 11 are provided.

The lower surface of the block body 6 is the rail body 4
Is formed of a concentric circular arc surface facing the upper surface of the block main body 6 through a predetermined gap, and a single roller track groove 10 is provided at the center of the lower surface of the block main body 6. The roller raceway groove 10 has a substantially rectangular cross section, and the roller rolling surface 1 having an arcuate cross section with the same curvature as the upper surface of the rail body 4 is provided on the upper bottom thereof.
4 are formed. Further, the block main body portion 6 has a roller escape passage 1 extending linearly along with the roller raceway groove 10.
5, end plates 17 having U-shaped direction changing passages 16 that connect both ends of the roller raceway groove 10 and both ends of the roller escape passage 15 are fixed to both ends of the block body 4. Roller raceway groove 10 in load area
To a roller circulation path connecting the roller escape passages 15 in the unloaded region.

Further, the upper surface of the supporting piece portion 9 of the moving block is constructed to face the lower surfaces of the left and right half portions 41, 41 of the rail body portion 4, and the upper surface of each supporting piece portion 9 has one row of roller tracks. A groove 11 is provided. Each roller raceway groove 11 has a rectangular cross section, and a roller rolling surface 18 is formed on the bottom of the roller raceway. Further, the support piece portion 9 is provided with a roller escape passage 19 which extends linearly along with each roller raceway groove 11, and further, the roller raceway groove 11 and the roller escape passage 19 are provided.
A U-shaped direction change path 20 that communicates with each other is formed in the end plate 17, and a roller circulation path that connects the roller raceway groove 11 in the loaded area to the roller escape path 19 in the unloaded area is configured.

Between the upper surface of the rail main body 4 and the lower surface of the block main body 6, one barrel-shaped roller row 12 is arranged along the longitudinal direction of the rail main body 4 in a region corresponding to the base 5. It is installed so that it can roll freely. This barrel-shaped roller row 12 is composed of a large number of barrel-shaped rollers 13 filled over the entire circulation path provided in the moving block 3.
It circulates between the roller raceway groove 10 and the roller escape passage 15 via the direction change passage 16. Each barrel-shaped roller 13 has an outer peripheral cross-sectional shape that passes through the center axis of the roller and has an arc shape in which the central portion swells,
The radius of curvature of this arc is set to be substantially the same as the upper surface of the rail body 4. In particular, it is preferable to set the radius of curvature of the arc-shaped contour line cut along the plane passing through the center axis of each barrel roller 13 to be slightly smaller than the radius of curvature of the arc-shaped cross section in the width direction of the upper surface of the rail main body 4. .

In this way, the central portion of the barrel roller 13 comes into contact with the upper surface of the rail main body 4 and both ends are slightly lifted, and resistance due to differential slip is exerted while a light load is applied. Is not so big and moves lightly,
When a heavy load is applied during cutting or the like, the barrel roller 13 is compressed and contacts the upper surface of the rail body 4 over the entire length up to both ends, so that the differential slip is increased and the damping property can be enhanced. Specifically, the radius of curvature of the arcuate contour line cut along the plane passing through the central axis of the barrel roller 13 is approximately 0.95 to 0. It is desirable to set it in the range of 99. With this setting, differential slip effectively acts.

Further, between the lower surface of the left and right half portions 41 of the rail main body 4 and the support piece portion 9, one hourglass-shaped roller row 21 is provided. This drum-shaped roller array 21 is also composed of a large number of drum-shaped rollers 22 filled in the entire circulation passage provided in the moving block 3, and the roller raceway groove 11 and the roller escape passage 19 are provided via the direction change passage 20.
Circulate between. Each of the hourglass-shaped rollers 22 has an outer peripheral cross-sectional shape that passes through the center axis of the roller and has an arcuate shape in which the central portion is constricted, and the radius of curvature of this arc is also set to be substantially the same as the lower surface of the rail body 4. In this case, the radius of curvature of the arcuate contour line cut along the plane passing through the center axis of each hourglass roller 22 is set to be slightly larger than the radius of curvature of the arcuate width-direction cross section of the lower surface of the rail body 4. It is preferable. Specifically, in correspondence with the relationship between the barrel roller 13 and the upper surface of the rail main body 4, the radius of curvature of the lower arc of the rail main body 4 is an arc shape cut at a plane passing through the central axis of the hourglass roller 13. The radius of curvature of the outer shape line may be set to be in the range of approximately 0.95 to 0.99, or may be set appropriately according to the operating load condition.
The contact angle α of the hourglass roller 22 is set according to the usage conditions. The contact angle α connects the center of curvature O of the rail main body 4 to the axial center of each hourglass roller 22 (the central position of the hourglass roller) with respect to the vertical axis V passing through the center of the rail body 4. The angle formed by the contact angle line A.

Further, in the present embodiment, the barrel roller row 12 is held in series by the flexible roller holding belt 23. The roller holding belt 23 includes a belt-shaped belt main body 26 in which substantially barrel-shaped storage holes 24 for holding the barrel-shaped rollers 13 are provided at a predetermined pitch through a spacer portion 25, and the storage holes of the belt main body 26. The end face holding plate 27 is provided on the end edge of the width direction 24 of 24. In addition, an engagement piece 29 that engages with the barrel-shaped roller 13 and holds the barrel-shaped roller 13 is provided at the hole edge of the storage hole 24. The roller holds the end surface holding plate 27 in contact with the roller end surface of each barrel-shaped roller 13 and stably holds the shaft of each roller in a direction orthogonal to the moving direction of the moving block. An engaging convex portion 28 that is rotatably and slidably engaged with a center hole 13a provided on the end surface of the shaped roller 13 is provided. The end face holding plate 27 is provided on the roller raceway groove 1
Guided to the inner wall of 0. The center hole 13a is a conical hole having a triangular cross section.

Further, the hourglass roller array 21 is held in series by a flexible roller holding belt 33. The roller holding belt 33 includes a belt-shaped belt main body 36 in which substantially drum-shaped storage holes 34 for holding the hourglass-shaped rollers 22 are provided at a predetermined pitch via a spacer portion 35, and the storage holes of the belt main body 36. And an end face holding plate 37 provided at an end edge in the width direction of 34. Engagement pieces 39 that engage with the hourglass roller 22 and hold the hourglass roller 22 are provided at the front and rear edges of the storage hole 34. The end face holding plate 37 is in contact with the roller end face of the hourglass roller 22 and stably holds the axis of each roller in a direction orthogonal to the moving direction of the moving block. An engaging convex portion 38 that engages with a center hole 22a provided on the end face of the shaft is rotatably and slidably provided. The end face holding plate 37 is guided to the inner side wall of each roller raceway groove 11. Center hole 2
2a is constituted by a conical hole having a triangular cross section. As described above, in this embodiment, the linear movement of the moving block 3 along the longitudinal direction of the track rail 2 causes the barrel roller row 12 to move.
And the drum-shaped roller row 21 is guided by rolling, and the moving block 3 is moved in the width direction of the rail body portion 4 by the sliding of the barrel-shaped roller row 12 and the drum-shaped roller row 21 along the upper surface and the lower surface of the rail body portion 4. It is possible to move in an arc shape.

Since the linear roller guide device of the present embodiment uses the barrel roller array 12 and the hourglass roller array 21 which are more rigid than balls, a highly rigid linear guide device can be realized. Further, the load from above is supported by the barrel-shaped roller row 11 that contacts the upper surface of the rail body 4, and the floating load 21 from below is supported by the hourglass-shaped roller row 21 that contacts the lower surface of the rail body 4. It can support loads from both directions. 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. However, when it is mounted on a table or the like, the linear roller guide devices 1 are used in pairs or with the linear roller guide device 1 and a pair of other linear guide mechanisms of different structures such as rollers or balls, and the moving block 3 is used as a table. Since the moving block 3 cannot move in the arc direction in the state where the guided members such as the above are assembled, the hourglass roller 22 that contacts the lower surface arc of the rail main body 4 and the barrel roller 13 that contacts the upper surface arc also with respect to the lateral load. It can be supported on one side with respect to the maximum diameter part, and basically can support loads in four directions in the vertical and horizontal directions.

In particular, the supporting rigidity can be further increased by setting the length of the upper row of barrel rollers 12 to be long. For example, by setting the length of the barrel-shaped roller row 12 contacting the upper surface of the rail main body 4 to be about twice as long as the hourglass roller 22 on the lower surface side, the upper one row and the lower row 2
It is also possible to adopt a structure of equal loads in four directions in spite of the structure of rows. In addition, since the rail body 4 has a circular cross-sectional shape in the width direction, the barrel roller 13 and the hourglass roller 22 slide along the upper and lower arcs of the rail body 4, and the moving block 3 moves on the rail body. It is possible to move in an arc about the curvature center O of the portion 4 by a predetermined angle θ.
Therefore, even if there is an attachment error between the moving block 3 and the track rail 2, for example, the parallelism between the mating attachment surfaces of the moving block 3 and the track rail 2 is incorrect, the moving block 3 is moved by the rail main body according to the attachment error. 4 moves in a circular arc to absorb the mounting error. Further, even if the moving block 3 moves in an arc, the arc-shaped rail main body 4
The contact state of the barrel-shaped roller 13 and the hourglass-shaped roller 22 with respect to does not change. As described above, according to the present invention, it is possible to realize a linear roller guide device having high rigidity and self-aligning property.

Further, since the barrel roller 13 and the hourglass roller 22 are used as the rolling elements, the diameter of the cross section orthogonal to the rolling axis of each roller differs between the central portion and both axial end portions. The circumference length is different, and the differential slip occurs as described above. This differential slip can improve the damping property. Further, at least the barrel-shaped roller 13 among the barrel-shaped roller 13 and the hourglass-shaped roller 22 may have a pipe shape having the hollow hole 13a (FIG. 1 (C)).
reference). As a result, the compressive load from above is absorbed by the compressive deformation of the barrel roller 13, while the impact load from below is absorbed by the bending deformation of the left and right halves 41, 41 protruding from the base 5 of the rail body 4. can do. Of course, although not shown, if the hourglass roller 22 is also formed in a hollow shape, it is possible to enhance the shock absorbing ability against a shock load from below. If you do this,
It is possible to prevent an excessive load from being applied to the contact portion between the barrel roller 13 and the hourglass roller 22, particularly the edge portion.

Next, a modified example of the shape of the track rail and the fixing means of the first embodiment will be described. In the following description, only the points different from the above-described first embodiment will be described, the same components will be assigned the same reference numerals, and the description thereof will be omitted.

Modification 1. FIG. 6 shows a first modification of the linear roller guide device according to the first embodiment of the present invention. This linear roller guide device is provided with right and left fixed flange portions 251, 251 of the track rail 2.
One of them is inserted into the engagement groove 201 of the base 200, and the other fixing flange portion 251 is fixed on the base 200 by a separate pressing tool 210. Base 2
The engagement groove 201 of No. 00 and the fixed flange portion 251 are in the relationship of a fluted groove, and the upper surface 251a of the fixed flange portion 251.
Is an inclined surface that inclines downward as it moves away from the center to the left and right, and the upper inner side surface of the engagement groove 201 is also an inclined surface following the upper surface 251a of the fixed flange portion 251.
Further, the pressing tool 210 is fixed to the base 200 by a fastening tool 211 such as a bolt, and a fixing piece 212 that extends from one side edge of the fixing piece 212 and engages with the upper surface of the other fixing flange 251. The pressing piece portion 213 is provided. In this way, the work of attaching the track rail 2 can be performed from above the track rail 2, so workability is good.

Modification 2. FIG. 7 shows a modification of the first embodiment of the present invention. In this linear roller guide device, bolt holes 353 are provided in the left and right fixing flange portions 351 of the track rail 2, and the track rail 2 can be fixed to the base 300 using the bolt holes 353. By doing so, as in the second embodiment, the work of attaching the track rail 2 can be performed from above the track rail 2, so that workability is good.

Embodiment 2. 8 and 9 show a linear roller guide device according to a second embodiment of the present invention. In the second embodiment, the two sets of the linear roller guide devices described in the first embodiment are turned upside down, the track rails 2 and 2 are arranged orthogonally, and the two moving blocks 3 and 3 are back-to-back and integrated. It is a single moving block 3A. Here, the term "integrated" includes both the case where two separate moving blocks 3 and 3 are integrally coupled with each other by a bolt or the like, and the case where they are integrally molded with one seamless material. That is, the linear roller guide device 100 includes a lower first linear motion guide portion 100A and a lower first linear motion guide portion 100A.
Upper second linear motion guide portion 1 for guiding in the direction orthogonal to A
00B and. The configuration of the lower first linear motion guide portion 100A is exactly the same as that of the first embodiment, and the upper second linear motion guide portion 100B is different from the lower first linear motion guide portion 100A. The point is that the basic configuration is exactly the same, except that they are arranged upside down, and that the directions of the first and second track rails are arranged orthogonally. The same components as those of the above are denoted by the same reference numerals, and the description thereof will be omitted.

In the second embodiment, the track rail 2 of the first linear motion guide portion 100A is attached to the base 300 and the like, and the track rail 2 of the second linear motion guide portion 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 and 2 are, as described above, the axis line passing through the curvature center O of the arc-shaped cross section in the width direction of the upper surface C1 and the lower surface C2 of the left and right projecting portions 41 and 41 of the rail body portions 4 and 4. Since it has a degree of freedom in the direction of rotation about the moving block 3A with respect to the moving block 3A, the inclination of the mounting surface of the base and the moving object can be absorbed, and the smoothness can be obtained regardless of the accuracy of the mounting surface. Move to. The inclination of the mounting surface is caused not only by the assembling error at the time of assembling but also by the external force at the time of traveling, and is caused by the thermal expansion.
Such an error is caused by the 4
It can be absorbed by the slip of the barrel roller row 12 and the hourglass roller row 21 with respect to 1, 41.

Embodiment 3. Next, a third embodiment 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, a plurality of the linear roller guide devices 1 described in the above-mentioned first embodiment are arranged in parallel in two rows in this embodiment, and the two rows of linear roller guide devices 1,
The linear motion of the table 303 is guided via the table 1.

That is, two track rails 2 and 2 arranged in parallel are fixed to the base 300, and the moving blocks 3 and 3 assembled on these track rails 2 and 2 are connected to each other by the table 303. Is fixed. Since the linear roller guide device 1 has exactly the same configuration as that of the first embodiment, the same components are designated by the same reference numerals and the description thereof will be omitted. The linear roller guide device of the first embodiment alone is not practical as a conveyance guide, and a table guide device is formed in parallel with the linear roller guide device of the first embodiment in pairs with other guide mechanisms. In the fourth embodiment, a pair of the linear roller guide devices 1 and 1 of the first embodiment are used.

Fourth Embodiment FIGS. 11 to 13 show a roller guide device according to a fourth embodiment. This roller guide device is equipped with a track rail 2
02 is different from the first embodiment in that it is a curved rail that curves so as to project to the side opposite to the moving block 3 along the longitudinal direction, and other configurations are basically the same as in the first embodiment. is there. In the following description, only the differences will be described, the same components will be assigned the same reference numerals, and description thereof will be omitted. That is, the rail main body 204 of the track rail 202 is curved so as to project downward (on the side opposite to the moving block 3) along the longitudinal direction.
And a base portion 205 that supports the widthwise central portion of the lower surface of the rail body portion 204 orthogonal to the longitudinal direction, and the cross-sectional shape of the rail body portion 204 in the width direction projects downward (to the side of the base portion 205). Thus, the upper surface arc C1 of the rail main body 204 and the lower surface arc C2 of the lower surface of the left and right overhanging portion 41 of the rail main body 204 that separates the base 205 are concentrically formed. . 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 the lower end portion thereof is provided with a fixed flange portion 51 extending laterally in the width direction. The upper end of the base portion 205 has an arc shape along the longitudinal arc shape of the rail body portion 204 and is integrally connected to the lower surface of the rail body portion 204. The lower end of the base portion 205 extends linearly, and the fixed flange portion 51 also extends linearly.

Regarding the moving block 3, the roller raceway groove 10 and the roller rolling surface 14 of the barrel roller row 12 provided on the lower surface of the block body 6 and the hourglass roller provided on the upper surface of the support piece portion 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 portion 204, corresponding to the rail main body 204. Of these, since the roller rolling surface of the hourglass-shaped roller row 21 is inclined to the left and right, strictly speaking, the moving distances of the left and right ends of the hourglass-shaped roller row 21 are different, but the curvature of the rail main body portion 204 in the longitudinal direction is curved. Although the radius R is exaggeratedly small in order to make it easy to understand in the drawing, since it is as large as several meters in reality, the influence of the difference in the moving distance is negligible, and the rolling of the hourglass-shaped roller array 21 is not affected. Instead, it rolls smoothly.

Fifth Embodiment FIG. 14 shows a roller guide device according to the fifth embodiment of the present invention. In the fifth embodiment, two sets of the roller guide device described in the fifth embodiment are turned upside down, the track rails 202, 202 are arranged orthogonally, and the two moving blocks 203, 203 are back-to-back and integrated. Turn 1
This is one moving block 203A. here,
Integration means two moving blocks 203, 203 which are separate bodies.
Both the case where they are integrally connected with a bolt or the like, and the case where they are integrally formed with one seamless material. That is, the roller guide device 200 includes a lower first motion guide portion 200A and a lower first motion guide portion 2A.
00A upper second motion guide portion 2 for guiding in a direction orthogonal to 00A
00B and. The configuration of the lower first motion guide portion 200A is exactly the same as that of the first embodiment, and the difference between the upper second motion guide portion 200B and the lower first motion guide portion 200A is that The basic configuration is exactly the same as that of the above-mentioned embodiment, except that it is arranged upside down and the direction of the pair of track rails 202, 202 is orthogonal. The same reference numerals are given to the components, and the description thereof will be omitted.

In particular, in the present embodiment, when it is used as a building support mechanism for a seismic isolation device, one track rail 202 is fixed to a foundation floor (not shown), and the other track rail 202 has a building. Fixed. Then, the rail main body 20 in which the building is vertically arranged by the vibration energy of the earthquake
Although it moves horizontally along 4,204, since each track rail 202,202 has an arc shape that bends up and down, the building is lifted upward as it moves in the vibration direction from the lowest point. The kinetic energy is converted into potential energy and stops, and gravity tries to return to the initial position. After repeating the pendulum motion several times like this,
It stops at the lowest point of the track rails 102, 202. Also in the present embodiment, similarly to the conventional example shown in FIG. 16 , a plurality of inclined absorption type curvilinear roller guide devices 100 support a building on a foundation floor, and in a state in which a horizontal posture is maintained. The building makes a curvilinear motion along the curved surface in the longitudinal direction of the rail body portion 204 of each track rail 202, 202. One track rail 2 of the moving block 203A
The movement of 02 along the longitudinal direction is guided by the rolling of the barrel roller row 12 and the hourglass roller row 21. The moving block 203A is inclined as the moving block 203A moves along the first rail 1 rail 202. On the other hand, since the track rail 202 fixed to the building maintains the horizontal state, the moving block 2 is moved relative to the track rail 202.
03A will be inclined. This inclination is absorbed by the sliding of the barrel roller array 12 and the hourglass roller array 21 along the arcuate 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 motion of the building. In the case of the present embodiment, for example, when the moving block 203A moves along the longitudinal direction of one of the track rails 202, the rolling friction between the barrel roller row 12 and the hourglass roller row 21, and the barrel shape. Sliding friction acts on the rail main body 204 of the roller row 12 and the hourglass roller row 21 along the arcuate surface in the width direction. Further, when the moving block 203A moves along the longitudinal direction of the other track rail 202, the rolling friction between the other barrel roller row 12 and the hourglass roller row 21 and the one barrel roller row 12 and the hourglass shape. Sliding friction acts on the one rail main body portion 204 of the roller row 21 along the arcuate 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.

Sixth Embodiment Next, a sixth embodiment of the present invention will be described. FIG. 15 shows a table guide device according to a sixth embodiment of the present invention. In this embodiment, a plurality of curved roller guide devices described in the above-mentioned Embodiment 5 are used, and in this embodiment, two are used.
These two rows of linear roller guide devices 1, 1 are arranged in parallel.
The linear motion of the table 301 is guided via the.

That is, the two track rails 2 and 2 arranged in parallel are fixed to the base 302, and the table 301 is connected so as to connect the moving blocks 3 and 3 assembled to these track rails 2 and 2. Is fixed. Since the linear roller guide device 1 has exactly the same configuration as that of the first embodiment, the same components are designated by the same reference numerals and the description thereof will be omitted. The linear roller guide device of the first embodiment alone is not practical as a conveyance guide, and a table guide device is formed in parallel with the linear roller guide device of the first embodiment in pairs with other guide mechanisms. In the fourth embodiment, a pair of the linear roller guide devices 1 and 1 of the first embodiment are used.

[0044]

As described above, according to the first aspect of the invention, the cross-sectional shape of the rail main body in the width direction is formed into an arc shape which is curved so as to project downward, and the top arc of the rail main body is formed. A track rail in which the lower surface arcs of the lower surface of the left and right half portions of the rail main body that separate the base portion are concentrically formed,
A block body facing the upper surface of the rail body,
A pair of left and right leg portions projecting downward from both widthwise end portions of the block main body portion, and a support projecting from the leg portion toward the width direction center side of the track rail and facing the lower surface of the left and right half portions of the rail main body portion. A moving block including a piece; and a block that corresponds to the base and is located between the lock main body corresponding to the base and the upper surface of the rail main body, and rolls along the longitudinal direction of the rail main body. A row of barrel-shaped roller rows composed of a large number of barrel-shaped rollers that are movably interposed, and a rail body portion between the left and right support piece portions of the rail body portion and the lower left and right half portions of the rail body portion. And a drum-shaped roller train that is composed of a large number of drum-shaped rollers that are rotatably inserted along the longitudinal direction, and that uses a barrel roller train and a drum-shaped roller train that have higher rigidity than balls. Realizes a highly rigid linear guide device Kill.

The load from above is supported by the barrel-shaped roller row that contacts the upper surface of the rail body, and the floating load from below is supported by the hourglass-shaped roller row that contacts the lower surface of the rail body. Can support the load of. On the other hand, this linear roller guide unit alone has a degree of freedom in the arc direction of the rail body. However, when it is mounted on a table or the like, the linear roller guide devices are used in pairs or with the linear roller guide device and a pair of various linear guide mechanisms of different structures such as different rollers or balls, and the moving block is mounted on the table or the like. Since the moving block cannot move in the arc direction when the guide member is assembled, even in the lateral load, it is supported at one side part with respect to the maximum diameter part of the hourglass roller and the barrel roller that come into contact with the lower surface arc of the rail body part. Therefore, it is possible to basically support the load in four directions of up, down, left and right.

Further, since the cross-sectional shape of the rail main body in the width direction is arcuate, the barrel roller and the hourglass roller slide along the upper and lower arcs of the rail main body,
The moving block can move in a circular arc. Therefore, even if there is a mounting error between the moving block and the track rail, such as a deviation in the parallelism between the moving block and the mating mounting surface of the track rail, the moving block moves in an arc along the rail body according to this mounting error. Then, the mounting error is absorbed. Further, even if the moving block moves in an arc, the contact state of the barrel roller and the hourglass roller with the arc-shaped rail main body does not change. As described above, according to the present invention, it is possible to realize a linear roller guide device having high rigidity and self-aligning property.

Further, since the barrel-shaped roller and the hourglass-shaped roller are used as the rolling elements, the diameter of the cross section orthogonal to the rolling axis of each roller is different in the central portion and both axial end portions, so that the circle is formed. Circumferential length is different and differential slip occurs during rolling. This differential slip can improve the damping property.

According to a second aspect of the present invention, the radius of curvature of the arcuate outline line cut along the plane passing through the center axis of the barrel roller is calculated from the radius of curvature of the arcuate widthwise cross section of the upper surface of the rail main body. By setting it slightly smaller, the center of the barrel roller comes into contact with the upper surface of the rail body, causing both ends to float up slightly, and the resistance due to differential slip is so large while a light load is applied. The barrel roller is compressed during heavy loads such as during cutting and comes into contact with the upper surface of the rail body over the entire length up to both ends, increasing the differential slip and improving the damping performance.

According to a third aspect of the present invention, a fixed flange portion that projects left and right is provided at the lower end portion of the base portion of the track rail.
The left and right upper ends of the rail main body are located on the same plane parallel to the bottom surface of the fixed flange portion, and further, the left and right end portions of the rail main body portion and the left and right end portions of the fixed flange portion are placed on the bottom surface of the fixed flange portion. Since the track rails are positioned on the same plane at right angles to each other, the cross-sectional shape of the track rail becomes a cross-sectional I shape in which the rail main body and the fixing flange project left and right at the upper and lower ends of the base, so that the second moment of area is large. Becomes
Bending rigidity increases both in the vertical direction and in the horizontal direction. Therefore, a large rigidity can be obtained with the minimum material. Further, the mounting stability is improved by projecting the fixed flange portion. In addition, the material of the material is likely to be plastically deformed in the upper and lower rail body portions and the fixed flange portion during the drawing process or the like, and the track rail can be easily processed. Also, since the left and right upper ends of the rail main body, the left and right ends of the rail main body and the fixed flange, and the bottom of the fixed flange are located on the four sides of the quadrangle, the warp correction of the track rail is The right and left ends of the rail section should be on the same plane, and the side surfaces should be straightened so that the rail body and the left and right ends of the fixed flange are on the same plane. .

In the invention according to claim 4, a bolt hole is formed on the bottom surface of the base portion, and the track rail is fixed from below, so that the bolt hole is not opened in the center of the upper surface of the rail main body portion, and the track rail is not opened. Can be fixed. In the invention according to claim 5, the fixing flange portion is provided with a hole for inserting a bolt, and the track rail can be fixed from above, so that the track rail can be fixed from above. Claim 6
According to the invention of claim 1, the fixing flange portion can be fixed from above via a separate presser, so that the track rail can be fixed from above.

In the invention according to claim 7, at least the barrel-shaped roller of the barrel-shaped roller and the hourglass-shaped roller is hollow,
By absorbing the compressive load from the upper side by the compressive deformation of the barrel-shaped roller, while absorbing the impact load from the lower side by the bending deformation of the left and right halves protruding from the base of the rail body, the barrel-shaped roller and drum It is possible to prevent an excessive load from being applied to the contact portion of the shaped roller, particularly the edge portion.

The invention according to claim 10 relates to claims 1 to 7.
By reversing the roller guide device described in 1 above, the track rails are arranged orthogonally, and the two block main bodies are integrated as a back surface unit to form one moving block.
It is possible to guide a moving object parallel to the base in two axial directions.

Particularly, when the track rail is a curved rail, the curving motion of the moving block along the longitudinal direction of the track rail causes the rolling of the barrel roller train and the drum-shaped roller train between one track rail and the block body. The inclination of the other block main body with respect to the other track rail due to this curving motion is absorbed by the widthwise sliding of the barrel roller array and the hourglass roller array between the other block main body and the track rail. can do. In this way, the barrel-shaped roller array and the hourglass-shaped roller array function not only as rolling guides but also as tilt absorbing mechanisms, so there is no need for an elastic absorbing mechanism such as an elastic body or universal joint between the block main body parts, and the structure is simple. In addition, the maximum load that can be supported can be increased as much as possible by utilizing the load supporting characteristics of the roller. When this curved track rail is used as a building support mechanism for a seismic isolation device, the building moves horizontally along each curved track rail due to the seismic energy of the earthquake, but from the lowest point to the longitudinal direction. As the position increases as it moves to, the kinetic energy is converted into potential energy and stops, and gravity tends to return to the initial position. After repeating the pendulum motion several times in this way, it stops at the lowest point of each track rail. During this pendulum movement, the vibration is damped by the frictional resistance of each roller, but not only rolling friction but also sliding friction acts, so that there is also an effect that the vibration damping effect is enhanced.

Further, this roller guide device can absorb misalignment in the biaxial directions. That is, the lateral inclination of the block main body part with respect to one track rail in the width direction is absorbed by the arc-shaped slide along the arc-shaped rail body part of one track rail, and the lateral direction of the block body part with respect to the other track rail in the width direction. Is absorbed by the arc-shaped slide along the arc-shaped rail body of the other track rail. In the case of this roller guide device, it is suitable 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 a building and a foundation floor cannot be expected to be completely different. Thus, even if the mounting surface is inclined, the first and second barrel roller rows and the first and second barrel roller rows are
Since the hourglass-shaped roller array functions as a tilt absorbing mechanism like a universal joint, it moves smoothly regardless of the accuracy of the mounting surface.

According to an eleventh aspect of the present invention, at least one of the upper and lower track rails orthogonally arranged according to the tenth aspect is arranged in parallel, and moving blocks are respectively provided at intersections 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 than when the track rails are mounted one by one.

According to a twelfth aspect of the table guiding device, a plurality of the roller guiding devices according to any one of the first to ninth aspects are arranged in parallel, and the table is guided through the plurality of roller guiding devices. This is optimal when the mounting accuracy of the two track rails is poor. For example, when there is a deviation in the parallelism between the two track rails, the deviation in the vertical direction means that the barrel-shaped roller row and the hourglass-shaped roller row slide along the arcs in the width direction of the upper surface and the lower surface of the rail main body. The center is automatically adjusted by inclining in the width direction. Also, if there is a deviation in the parallelism in the left-right direction, the roller shafts of each barrel roller row and hourglass roller row should be inclined with respect to the cross section orthogonal to the longitudinal direction of the rail main body that is arcuate in the width direction. But
Since the roller of the present invention is formed in the barrel shape and the hourglass shape, the edge load is relaxed because the edge is not an acute angle unlike the cylindrical roller.

[Brief description of drawings]

1A is a vertical front sectional view of a linear roller guide device according to a first embodiment of the present invention, FIG. 1B is a sectional view taken along the line BB of FIG. (C) is an example in which the barrel roller has a hollow shape.

2 (A) is a schematic perspective view of the apparatus of FIG. 1, and FIG. 2 (B) is a sectional view taken along the line CC of FIG. 1 (A).

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

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

5A and 5B show a holding belt of the hourglass roller of the apparatus shown in FIG. 1. FIG. 5A is a front view, FIG. 5B is a plan view, and FIG. A) CC sectional view taken on the line, and the figure (D) is a side view of the figure (B).

FIG. 6 is a diagram showing a modified example 1 of the fixing means of the track rail of the device according to the first embodiment of the present invention.

7 is a diagram showing a modified example 2 of the fixing means of the track rail of the device of FIG.

FIG. 8 is a partially cutaway front view of a roller guide device according to a second embodiment of the present invention.

9 is a plan view of the device of FIG.

FIG. 10 shows a table guide device according to a third embodiment of the present invention. FIG. 10 (A) is a plan view and FIG. 10 (B) is a side view.

11 (A) is a front vertical sectional view of a roller guide device according to a fourth embodiment of the present invention, and FIG. 11 (B) is a line BB of a moving block of the device of FIG. 11 (A). The view shown in the section along the line, (C) is an example in which the barrel roller is hollow.

12 (A) is an external perspective view of the apparatus of FIG. 11 , and FIG. 12 (B) is a sectional view taken along line CC of FIG. 12 (A).

13 (A) is a cross-sectional view showing the track rail taken along the plane position of the end plate of the apparatus of FIG. 11 , FIG. 13 (B) is a plan view of the apparatus of FIG. 11 , and FIG. FIG. 12 is a partially cutaway side view of the device of FIG. 11 .

FIG. 14 is a partially cutaway front view of a roller guide device according to a fifth embodiment of the present invention.

Figure 15 shows a table guide apparatus according to the sixth embodiment of the present invention, FIG. (A) is a plan view, FIG. (B) is a side view.

FIG. 16 is a schematic view showing an example of a usage state of a conventional curved roller guide device with a tilting mechanism.

FIG. 17 is a schematic view showing an example of a conventional roller guide device.

[Explanation of symbols]

1 Roller guide device 2,202 track rail 3,3A moving block 4,204 Rail main body, first and second rail main body 41 Left and right overhang 5,205 base portion, first and second base portion 6 block body 7 space 8 legs 9 Support piece 10 roller raceway groove 11 roller raceway groove 12 barrel-shaped roller row 13 barrel-shaped rollers 14 Roller rolling surface 15 Roller escape hole 16 turn-around 17 End plate 18 Roller rolling surface 19 Roller escape hole 20 turn road 21 Hourglass roller row 22 Hourglass roller 23 Roller holding belt

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP 2000-291653 (JP, A) JP 2000-205255 (JP, A) JP 2000-55046 (JP, A) JP 5-177488 (JP , A) JP-A-11-82506 (JP, A) JP-A-2-24033 (JP, A) Actual development Sho 62-68022 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB) Name) F16C 29/04-29/06

Claims (12)

(57) [Claims] 1. A rail body portion extending in the longitudinal direction,
And a base portion supporting a widthwise central portion orthogonal to the longitudinal direction of the lower surface of the rail body portion, wherein the rail body portion has an arcuate shape which is curved so as to protrude downward. Section rail and a bottom rail of the left and right half of the rail main body part that separates the base part and a bottom surface arc of the bottom part of the rail body part concentrically, and a block main body part facing the upper surface of the rail main body part,
A pair of left and right leg portions projecting downward from both widthwise end portions of the block main body portion, and a support projecting from the leg portion toward the width direction center side of the track rail and facing the lower surface of the left and right half portions of the rail main body portion. A moving block having a piece portion; and a movable block provided between the block body portion and an upper surface of the rail body portion in a region corresponding to the base portion so as to be rollable along a longitudinal direction of the rail body portion. A row of barrel-shaped rollers composed of a large number of barrel-shaped rollers, and between the left and right supporting pieces of the block body and the lower surfaces of the left and right half portions of the rail body along the longitudinal direction of the rail body. A roller guide device comprising: a drum-shaped roller row configured by a large number of drum-shaped rollers movably interposed. 2. The radius of curvature of an arcuate contour line cut along a plane passing through the center axis of the barrel-shaped roller is set to be slightly smaller than the radius of curvature of the arcuate cross-section in the upper surface of the rail body. The roller guide device according to claim 1. 3. A fixed flange portion protruding leftward and rightward is provided at a lower end portion of a base portion of the track rail, and right and left upper end portions of the rail main body portion are positioned on the same plane parallel to a bottom surface of the fixed flange portion, 3. The roller guide according to claim 1, wherein the left and right end portions of the rail main body portion and the left and right end portions of the fixed flange portion are located on the same plane at right angles to the bottom surface of the fixed flange portion. apparatus. 4. The roller guide device according to claim 3, wherein a bolt hole that opens on the bottom surface of the base portion is provided to fix the track rail from below. 5. The roller guide device according to claim 3, wherein the fixing flange portion is provided with a hole for inserting a bolt so that the track rail can be fixed from above. 6. The roller guide device according to claim 3, wherein the fixing flange portion can be fixed from above via a separate pressing member. 7. A barrel-shaped roller and a drum-shaped roller, at least a barrel-shaped roller of which has a hollow shape so that a compressive load from above is absorbed by the compressive deformation of the barrel-shaped roller, while an impact load from below is absorbed by the rail body. The roller guide device according to any one of claims 1 to 6, wherein the roller guide device is absorbable by bending deformation of left and right halves protruding from a base portion of the portion. 8. The roller guide device according to claim 1, wherein the track rail is a linear rail extending linearly in the longitudinal direction. 9. The roller guide device according to claim 1, wherein the track rail is a curved rail that is curved so as to project in the direction opposite to the moving block along the longitudinal direction. 10. The roller guide device according to any one of claims 1 to 9 is turned upside down, the track rails are arranged orthogonally, and two block main bodies are integrated so that they are back-to-back and integrated into one moving block. A roller guide device characterized in that 11. A plurality of at least one of the upper and lower track rails that are orthogonally arranged according to claim 10 are arranged in parallel.
A roller guide device, wherein moving blocks are provided at intersections of upper and lower track rails, respectively. 12. A table guide device comprising a plurality of roller guide devices according to any one of claims 1 to 9 arranged in parallel and guiding the table through the plurality of roller guide devices. .