JP4257448B2 - Roller guide device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a roller guide device used for a guide part of a machine tool or a seismic isolation device for a building.
[0002]
[Prior art]
As a rolling element of a rolling guide device, a roller is more advantageous than a ball in order to support a heavy load because the roller is smaller in distortion than a ball in shape and has a higher pressure resistance than a ball. is there.
For example, the moving block includes a horizontal portion that faces the upper surface of the track rail, and a pair of left and right hanging portions that protrude downward from both ends in the width direction of the horizontal portion and face the left and right side surfaces of the track rail. A roller array composed of a large number of cylindrical rollers is interposed between the opposing surfaces of the left and right side surfaces and the left and right hanging parts of the moving block so as to freely roll.
However, in the case of a roller, the roller is deformed due to mounting error of the moving block and the track rail or deformation of the moving block due to external force (for example, deformation in which the left and right hanging parts of the moving block bend left and right or the horizontal part bend up and down). When the pair of roller rolling surfaces that are in rolling contact with each other are inclined, a so-called edge load is generated in which the axial end of the roller hits the roller rolling surface and the contact surface pressure increases.
[0003]
Here, a mounting error of this type of rolling guide device will be briefly described.
For example, the rolling guide apparatus is assembled as follows.
First, the track rail is fastened to the fixed bed. In general, a pair of track rails are fixed in parallel on a fixed bed, and a table as a guided member is mounted on a moving block that is assembled on each track rail. .
The track rail is hardened and ground with steel, but it is difficult to make it straight on production. Therefore, an attachment reference surface is formed at a portion where the track rail on the fixed bed is fastened. The mounting reference surface is composed of a horizontal reference surface that is abutted and contacted with the bottom surface of the track rail, and a vertical reference surface that is perpendicular to the horizontal reference surface and is abutted and contacted with the side surface of the track rail. These reference surfaces need to be fastened in parallel with the track rail and are therefore precisely machined by simultaneous machining. The upper and side surfaces of the track rail are fastened to the reference surface by bolts, and the straightness of the track rail is obtained. First, the straightness of the track rail on the spindle side is adjusted, and then the track rail on the dependent side is adjusted following the track rail on the spindle side.
Next, the moving block is fastened to the table. After forming the reference surface on the table as well as the fixed bed, temporarily assemble the reference side moving block and the dependent side moving block together, then fasten the reference side moving block and watch the movement to move the dependent side The block is to be fastened.
[0004]
In such assembling, the following factors cause mounting errors.
First, there is an error in the parallelism of the reference surfaces formed on the table and the fixed bed. For example, in the case of a machine tool that requires a high feed accuracy, the reference surface is precisely machined on both the table side and the fixed bed side. There is a case where one of the tables is precisely processed by simultaneous processing, and the other is a welded structure. In such a case, the parallelism of the reference surface is not.
Second, the parallelism may be partially out of order due to insufficient fastening with respect to the reference surface of the track rail.
Third, the parallelism may be lost due to insufficient fastening of the moving block with respect to the reference plane. For example, if four moving blocks are provided on each track rail, a total of four moving blocks, even if three moving blocks are correctly attached, one moving block cannot be accurately attached to the reference plane. As a result, the parallelism is distorted as a whole.
Also, even if the parallelism of the reference surface of the track rail and the moving block and accurate mounting to this reference surface are made, external force (for example, moment load around the track rail axis, lateral load, lift load, etc.) ), The hanging part of the moving block bends and deforms left and right, and the horizontal part bends and deforms, and the track rail that sandwiches the roller and the roller rolling surface on the moving block side tilt (no longer parallel). In addition, it is inevitable that an edge load occurs due to the axial end of the roller hitting the roller rolling surface.
[0005]
In order to alleviate such an edge load, conventionally, a barrel roller having an arcuate outer periphery is known (for example, see Japanese Examined Patent Publication No. 62-23168). If such a barrel-shaped roller is used, even if the roller rolling surface is inclined, it is possible to alleviate the contact of the end portion in the axial direction of the roller.
[0006]
[Problems to be solved by the invention]
However, even when the above barrel roller is used, the hanging part of the moving block bends to the left or right due to external forces such as mounting errors such as up / down and left / right parallelism between the left and right track rails and moment load. If it is deformed or the horizontal part is bent up and down, there is no change in the inclination between the roller rolling surfaces sandwiching the barrel roller, so an increase in the load at the axial end of the barrel roller is unavoidable. In other words, it causes premature wear of the rollers and roller rolling surfaces.
[0007]
The present invention has been made to solve the above-described problems of the prior art, and the object of the present invention is to maintain the line contact state of the barrel roller even when the moving block is deformed due to an attachment error or an external force. It is to provide a roller guide device to obtain.
[0008]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the invention according to claim 1 includes a track rail provided with concave portions extending in the longitudinal direction in a circular arc shape on the left and right side surfaces;
A horizontal portion facing the upper surface of the track rail, and a pair of left and right hanging portions that protrude downward from both ends in the width direction of the horizontal portion and have protrusions that are inserted into the recesses on the left and right side surfaces of the track rail. Moving block,
Upper and lower rows composed of a plurality of barrel-shaped rollers interposed between the concave portions on the left and right side surfaces of the track rail and the convex portions on the left and right hanging portions of the moving block so as to roll in the longitudinal direction of the track rail. A barrel-shaped roller train,
The two upper and lower barrel roller rows are slidable along the inner circumferential arc surface of the recess of the track rail.
In this way, the load from above can be supported by the lower barrel roller array, and the lifting load from below can be effectively supported by the upper barrel roller array.
In addition, even when the hanging part of the moving block is bent left and right due to external forces such as mounting errors such as up / down and left / right parallelism between the right and left track rails and moment load, it was provided at the hanging part according to the deformation The protrusion slides along the inner circumferential arc surface of the recess on the left and right side surfaces of the track rail via the barrel roller array, and the bending deformation of the hanging portion is absorbed, and each barrel roller is separated from the inner circumferential arc surface of the recess. It does not hit, can maintain a uniform line contact state, and can support the load effectively.
[0009]
The invention according to claim 2 is characterized in that a barrel-shaped roller row composed of a number of barrel-shaped rollers is interposed between the opposed surfaces of the upper surface of the track rail and the horizontal portion of the moving block.
Thereby, the load capability with respect to the load from upper direction can be enlarged.
[0010]
The invention according to claim 3 is characterized in that the horizontal portion can be bent and deformed.
Bending deformation is, for example, a thin horizontal part that facilitates vertical bending deformation. In this way, left and right drooping parts bend and deform due to mounting errors, etc., and at the same time the horizontal part deforms up and down. However, the deformation of the horizontal portion can also absorb attachment errors and the like, and the ability to absorb attachment errors and the like is increased. In addition, when the horizontal part is bent up and down, the amount of lateral displacement of the hanging part increases, but the barrel roller row held by the projecting part of the hanging part simply slides along the inner circumferential arc surface of the recess of the track rail. Therefore, the barrel roller is maintained in a uniform line contact state without hitting one piece.
[0011]
In the invention according to claim 4, a concave portion that forms a gap that allows elastic deformation of the horizontal portion is provided between the center portion of the upper surface of the horizontal portion and a mating mounting surface of a mounted member such as a table. It is characterized by.
The bending deformation of the horizontal portion is deformed so as to bend up and down, and the deformation of the concave shape that is depressed downward is free, but the deformation of the convex shape that protrudes upward interferes with the mating mounting surface. Therefore, if a gap is formed between the horizontal portion and the counterpart mounting surface, the upward deformation is absorbed by the gap.
[0012]
The invention according to claim 5 is characterized in that the horizontal portion cannot be bent and deformed.
Here, the inability to bend is compared with that of claim 3 in which bending deformation is possible. If the same material is used, the bending rigidity of the thin structure of claim 3 is increased, for example, as a thick structure. It is. In this case, unlike the third aspect, although the error absorption capability such as attachment error is reduced, the moving block has high rigidity, so that it is possible to guide the attached member such as the table with high accuracy.
[0013]
The invention according to claim 6 is characterized in that a bolt fastening tap hole for fixing to a member to be attached such as a table is provided at the center of the upper surface of the horizontal portion.
By bolting the central part of the horizontal part, the vertical deformation of the horizontal part can be more reliably regulated.
[0014]
The invention according to claim 7 is characterized in that the barrel rollers in the barrel roller row are chained in series by a roller coupling body.
By this roller coupling body, the central axis of the barrel roller can be accurately guided in a direction perpendicular to the moving direction of the moving block.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail based on the illustrated embodiment.
Embodiment 1
1 to 7 show a linear roller guide device according to Embodiment 1 of the present invention.
As shown in FIG. 1 and FIG. 2, the roller guide device 1 includes a track rail 3 having a recess 2 extending in the longitudinal direction in a circular arc shape on the left and right side surfaces, and a horizontal portion 4 facing the upper surface of the track rail 3. And a pair of left and right hanging parts 6, 6 that protrude downward from both ends in the width direction of the horizontal part 4 and have convex parts 5 that are inserted into the concave parts 2 on the left and right side surfaces of the track rail 3. Between the opposing surfaces of the moving block 7 having a shape, the concave portion 2 on the left and right side surfaces of the track rail 3 and the convex portion 5 of the left and right hanging portion 6 of the moving block 7, the rolling blocks 7 are interposed in the longitudinal direction of the track rail 3, respectively. And two upper and lower barrel roller rows 9 and 10, each of which is composed of a plurality of barrel rollers 8, and the upper and lower barrel roller rows 9 and 10 are connected to the inner circumference of the arc-shaped recess 2 of the track rail 3. The sliding movement is possible along the arc surface 2a.
Further, between the opposing surfaces of the upper surface of the track rail 3 and the lower surface of the horizontal portion 4 of the moving block, two right and left barrel roller rows 11 and 11 each including a plurality of barrel rollers 8 are provided. .
[0016]
As shown in FIGS. 3A to 3C, the barrel roller rows 9, 10, 11 are connected to the endless circulation paths 12 provided in the left and right hanging parts 6, 6 and the horizontal part 4 of the moving block 7, respectively. It is held so that it can move indefinitely.
The infinite circulation path 12 of each barrel-shaped roller row 9, 10, 11 includes a load roller rolling path 13 in a load-loading area and a return path 14 in a no-load area provided in parallel with the load roller rolling path 13 at a predetermined interval. And a U-shaped direction change path 15 connecting both ends of the load roller rolling path 13 and both ends of the return path.
The loaded roller rolling path 13 is a convex part of the left and right hanging parts 6 and 6 of the moving block 7 formed facing the inner peripheral circular arc surface 2a of the concave part 2 of the track rail 3 serving as a roller rolling surface on the track rail 3 side. The roller rolling surfaces 13a and 13a formed on the roller rolling surfaces 5 and 5 and the guide walls 13b for guiding the axial ends of the barrel roller 8 that rolls and moves on the roller rolling surfaces 13a and 13a. In this embodiment, since the barrel roller 8 is connected in series by the roller coupling body 20, the guide wall 16 b does not directly contact the end surface of the barrel roller 8 and is guided and held via the roller coupling body 20. The
[0017]
The barrel-shaped roller 8 is a spherical roller formed in an arc shape in which the intersection of the surface including the central axis and the outer peripheral surface of the roller swells in the center, and the arc of the recess 2 on the left and right side surfaces of the track rail 3 and the moving block 7 side. The roller rolling surface 13a has an arc shape with substantially the same curvature as the outer peripheral arc of the barrel roller 8. Therefore, the outer periphery of the barrel roller 8 is kept in line contact with the inner peripheral circular arc surface 2a of the recess 2 and the roller rolling surface 13a on the moving block 7 side over the entire length in the roller axial direction. Actually, it is preferable that the curvature radius of the inner peripheral circular arc surface 2 a of the concave portion 2 and the roller rolling surface 13 a on the moving block 7 side is slightly larger than the curvature radius of the outer peripheral circular arc of the barrel roller 8.
The moving block 7 includes a block main body portion 16 having a U-shaped cross section, and side lids 17 having a U-shaped cross section that are fixed to both axial end surfaces of the block main body portion 16 by bolts. The runway 13 and the return passage 14 in the no-load area are provided in the block main body 16, and the direction changing path 15 is formed in the side cover 17 (see FIGS. 2 and 3).
[0018]
The return passages 14 of the barrel roller rows 9 and 10 on the left and right side surfaces are interchanged with the load roller rolling path 13 so that the return path 14 corresponding to the upper load roller rolling path 13 is on the lower side and the lower side. A return passage 14 corresponding to the load roller rolling path 13 is located on the upper side. And each direction change path 15 cross | intersects in the cross shape seeing in the axial direction of the track rail 3 of FIG. In order to cross like this in a cross shape, the direction changing path 15 of one barrel-shaped roller row 9 is arranged closer to the end surface of the block main body portion 16, and the direction changing path 15 of the other barrel-shaped roller row 10 is arranged. It arrange | positions so that it may detour to the far side from the end surface of the block main-body part 71, and the direction change paths 15 and 15 do not interfere with each other.
The inner peripheral side half 15a of the direction changing path 15 of one barrel-shaped roller row 9 is formed integrally with the block main body 16 on the end surface of the block-shaped roller row 9, and this one barrel-shaped roller is formed on the side lid 17. An outer circumferential side half 15b corresponding to the inner circumferential side half 15a of the direction changing path 15 in the row 9 is formed, and the inner circumference of the other direction switching path 15 is orthogonal to the track surface of the outer circumferential side half 15b. An arch-shaped guide piece 18 formed with a side half 15a is provided (see FIGS. 6 and 7).
[0019]
The block main body portion 16 is composed of a metal block portion 16a and a resin portion 16b for forming the above-described endless circulation path 12, and the resin portion 16b allows the return passage 14 of the endless circulation path 12 of the barrel roller 8 to be loaded. A guide wall 13b of the roller rolling path 13 and an inner peripheral half 15a of the direction changing path 15 are configured. The resin portion 16b and the metal block portion 16a are integrally joined (see FIG. 4).
Further, on the upper surface of the horizontal portion 4 of the block main body portion 16, bolt holes 16 c for mounting the table are provided at three locations near the width direction central portion and both width direction end portions. Further, on the upper surface of the track rail 3, a bolt fastening hole 3b is opened between the two roller rolling surfaces 3a.
[0020]
The above-described concave portions 2 on the left and right side surfaces of the track rail 3 are provided symmetrically with respect to the vertical line V passing through the center of the track rail 3, and two rows of barrel rollers arranged in each of the concave portions 2, 2. 9, 10 are also arranged symmetrically. The two upper and lower barrel roller rows 9 and 10 are arranged above and below a horizontal line H connecting the centers of curvature of the inner peripheral circular arc surfaces 2a of the left and right recesses 2. Assuming that a line perpendicular to the central axis of the barrel rollers 8 of the upper and lower barrel roller rows 9 and 10 is a contact angle line L, and angles formed by the contact angle line L and the horizontal line H are contact angles α and β, The contact angle α of the upper barrel roller row 9 and the contact angle β of the lower barrel roller row 10 are set to the same angle. In this embodiment, the contact angles α and β of the upper and lower barrel roller rows 9 and 10 are both set to 45 degrees vertically with respect to the horizontal line.
[0021]
However, the contact angles α and β are not limited to 45 degrees, and appropriate contact angles are selected according to the load conditions. For example, when the load from the upper side is large, the contact angle α of the upper barrel-shaped roller row 9 may be increased, and when the load from the lower side is large, the contact angle of the lower barrel-shaped roller row 10 What is necessary is just to make (beta) large, and when the load from a horizontal direction is large, what is necessary is just to enlarge contact angle (alpha), (beta) of the upper and lower barrel roller row | line | columns 9,10. In short, an appropriate contact angle is selected according to the load condition. The contact angles α and β are preferably set in the range of 40 degrees to 50 degrees.
On the other hand, for the two barrel roller rows 11 and 11 arranged on the upper surface side of the track rail 3, the contact angle is set to 90 degrees when the angle formed by the contact angle line M and the horizontal line H is the contact angle. Has been.
[0022]
As shown in FIG. 8, the roller coupling body 20 includes a belt-like belt main body 23 in which a substantially barrel-shaped storage hole 21 in which the barrel-shaped roller 8 is held is provided at a predetermined pitch via a spacer portion 22; The belt main body 23 includes an end surface holding plate 24 provided at the edge in the width direction of each storage hole 21. The end face holding plate 24 is in contact with the roller end face of each barrel-shaped roller 8 and stably holds the axis of each roller in a direction perpendicular to the moving direction of the moving block 7. Engagement convex portions 25 that are rotatably engaged with center holes 8a provided on the end surface of the roller 8 are provided. The end face holding plate 27 is guided to the inner wall of the roller raceway groove 6. The center hole 8a is constituted by a conical hole having a triangular cross section.
[0023]
According to the roller guide device 1 according to the first embodiment, the load from above is located on the two upper surface barrel-shaped roller rows 11 and 11 located on the upper surface side of the track rail 3 and on the side surface side of the track rail 2. Since it is supported by the lower side barrel-shaped roller rows 9 and 9, the load capacity with respect to the load from above is large.
On the other hand, the lifting load from below can be effectively supported by the upper barrel roller array 10 located on the side of the track rail 3.
And even if the hanging parts 6 and 6 of the moving block 7 are inevitably deformed due to the action of an external force such as a mounting error such as a misalignment of the vertical and horizontal parallelism between the track rails arranged on the left and right, and a moment load, the deformation will be deformed. Accordingly, the projections 5 provided on the hanging parts 6 and 6 slide along the inner peripheral circular arc surface 2a of the recess 2 formed on the left and right side surfaces of the track rail 3 via the barrel-shaped roller rows 9 and 10, and mounting errors, etc. Therefore, the barrel rollers 8 do not come into contact with the inner peripheral circular arc surface 2a of the recess 2 and can maintain a uniform line contact state. Therefore, not only can the load be supported effectively, but also the durability can be improved.
In particular, the first embodiment is intended to increase the rigidity by making the horizontal portion 4 of the moving block 7 thick, and in particular, to fix the upper portion of the horizontal portion 4 to a mounted member such as a table. A bolt 16c is provided as a bolt fastening tap hole. The inability to bend and deform is a comparison with the second and third embodiments in which bending deformation is possible. If the same material is used, the thin portions of the horizontal portions 204 and 304 of the second and third embodiments can be compared. Bending rigidity is increased as a thick structure. In this embodiment, the thickness of the horizontal portion 4 is set to be larger than the upper and lower spans (the span between the return passage 14 and the load roller rolling passage 13) of the direction change passage 15 of the barrel roller row 11 on the upper surface side of the track rail 2. The return passage 14 is disposed in the solid part of the horizontal part 4. In this way, although the ability to absorb errors such as mounting errors is reduced, the moving block 7 has high rigidity, so that it is possible to guide a mounted member such as a table with high accuracy.
Moreover, the deformation | transformation of the horizontal part 4 is controlled by bolting the horizontal part 4 center part. The deformation of the horizontal portion 4 affects the displacement of the hanging portions 6 and 6. For example, if the center part of the horizontal part 4 is bent in a concave shape so as to be depressed downward, the left and right hanging parts 6 and 6 are displaced so that the distance between the lower ends is opened, and the center part of the horizontal part 4 protrudes upward. When bent in such a convex shape, the left and right hanging parts 6 and 6 are displaced so that the interval between the lower ends thereof is narrowed. If the center part of the horizontal part 4 is fastened to a mating mounting surface such as a table, the vertical deformation of the horizontal part 4 is restricted, so that the displacement of the hanging parts 6 and 6 can be minimized. it can.
[0024]
Further, since the barrel rollers 8 of the barrel roller rows 9, 10, 11 are chained in series by the roller connecting body 20, the central axis of the barrel roller 8 is relative to the moving direction of the moving block 7. It is possible to accurately guide in the orthogonal direction.
[0025]
Next, other embodiments 2 and 3 of the present invention will be described.
In the following description, only differences from the first embodiment will be described, and the same components are denoted by the same reference numerals and description thereof will be omitted.
Embodiment 2
FIG. 9 shows a second embodiment of the present invention.
In this second embodiment, the barrel-shaped roller rows 11 and 11 between the upper surface of the track rail 3 of the first embodiment are omitted, and four rows of barrel-shaped roller rows 9 in total, two rows on the left and right side surfaces of the track rail 2. , 10 are provided.
Further, the horizontal portion 204 can be bent and deformed. “Bendable” means that, for example, the horizontal portion 204 is thinned to facilitate vertical bending deformation. In the first embodiment, the horizontal portion 204 is thick, but in the second embodiment, the thickness of the horizontal portion 204 is made as thin as possible, and the barrel-shaped roller rows 11, 11 on the upper surface side of the first embodiment. It is narrower than the upper and lower spans of the direction change path 15, and the front ends of the left and right bolt holes 16 c, 16 c on the upper surface of the horizontal portion 204 are brought close to the return passages 14 of the left and right barrel roller rows 10, 10.
In this way, the left and right hanging parts 6 and 6 are bent and deformed to the left and right due to an attachment error and the like, and at the same time, the horizontal portion 204 is also deformed up and down. , Absorption ability such as mounting error is increased. Further, when the horizontal portion 204 is bent up and down, the amount of lateral displacement of the hanging portions 6 and 6 increases, but the barrel roller rows 9 and 10 held by the convex portions 5 and 5 of the hanging portions 6 and 6 are tracked. Since it slides along the inner peripheral circular arc surface 2a of the recess 2 of the rail 2, each barrel roller 8 is kept in a uniform line contact state without hitting one piece.
[0026]
Further, a shallow recess 304a is formed at the center of the upper surface of the horizontal portion 204 so as to form a gap that allows elastic deformation of the horizontal portion 204 with a mating mounting surface of a member to be mounted such as a table. The bending deformation of the horizontal portion 204 is deformed so as to bend up and down, and the concave deformation that is depressed downward is free, but the convex deformation that protrudes upward interferes with the mating mounting surface. Therefore, if the concave portion 304 is provided in the center of the upper surface of the horizontal portion 204 and a gap is formed between the opposite mounting surface, the upward bending deformation of the horizontal portion 204 is absorbed by this gap.
[0027]
Embodiment 3
FIG. 10 shows a third embodiment of the present invention.
The third embodiment is an intermediate type between the high rigidity type of the first embodiment and the flexible type of the second embodiment, and has the same high rigidity against the upward load as in the first embodiment. Intermediate performance with excellent flexibility.
Specifically, as in the first embodiment, the upper barrel barrels 11 and 11 are provided, but the horizontal portion 304 is thinner than the first embodiment and thicker than the second embodiment. is there. In the third embodiment, the thickness of the horizontal portion 304 is substantially the same as the upper and lower spans of the direction changing path 15 of the barrel-shaped roller row 11 on the upper surface side of the track rail 11, and the position of the return path 14 is on the upper surface of the horizontal portion 304. It is close. Further, the fastening bolt tap hole as in the first embodiment is not provided at the center of the horizontal portion 304, and the bending deformation of the horizontal portion 304 as in the second embodiment is provided at the center of the upper surface of the horizontal portion 304. A recess 304a is provided to allow the above.
[0028]
【The invention's effect】
As described above, according to the first aspect of the present invention, between the opposing surfaces of the concave portions on the left and right side surfaces of the track rail and the convex portions on the left and right hanging portions of the moving block, the rolling rails are interposed in the longitudinal direction of the track rail. Two upper and lower barrel roller rows composed of a plurality of barrel rollers to be mounted are provided, and the upper and lower barrel roller rows can slide along the inner circumferential arc surface of the recess of the track rail. As a result, the load from above is supported by the lower barrel roller row, and the lifting load from below can be effectively supported by the upper barrel roller row.
Also, even if the hanging part of the moving block bends left and right due to external forces such as mounting errors such as up / down and right / left parallelism deviation between the left and right track rails and moment load, it was provided at the hanging part according to the deformation The convex part slides along the arc of the inner circumference of the recess on the left and right side surfaces of the track rail via the barrel roller array to absorb deformation caused by mounting errors, etc. Therefore, a uniform contact state can be maintained and a load can be effectively supported.
[0029]
According to the second aspect of the present invention, the barrel-shaped roller train composed of a large number of barrel-shaped rollers is interposed between the opposed surfaces of the upper surface of the track rail and the horizontal portion of the moving block. The load capacity with respect to the load can be increased.
[0030]
According to the invention of claim 3, since the horizontal portion can be bent and deformed, the left and right hanging portions are bent and deformed left and right due to an attachment error or the like, and at the same time, the horizontal portion is vertically deformed. Can also absorb attachment errors and the like, and the ability to absorb attachment errors and the like is increased. In addition, when the horizontal part is bent up and down, the amount of lateral displacement of the hanging part increases, but the barrel roller row held by the projecting part of the hanging part simply slides along the inner circumferential arc surface of the recess of the track rail. Therefore, the barrel roller is maintained in a uniform line contact state without hitting one piece.
[0031]
According to the invention which concerns on Claim 4, the recessed part which forms the clearance gap which accept | permits the elastic deformation of a horizontal part between the other party attachment surfaces of to-be-attached members, such as a table, is provided in the upper surface center part of the horizontal part. As a result, the upward deformation of the horizontal portion is absorbed.
[0032]
According to the invention according to claim 5, by making the horizontal portion incapable of bending deformation, unlike the case of claim 3, the error absorbing ability such as mounting error is reduced, but the rigidity of the moving block is high, so that the table or the like The mounted member can be guided with high accuracy.
[0033]
According to the invention which concerns on Claim 6, the center part of a horizontal part is bolt-fastened by providing the tap hole for bolt fastening for fixing to a to-be-attached member, such as a table, in the upper surface center part of a horizontal part. By doing so, it is possible to more reliably regulate the vertical bending deformation of the horizontal portion.
[0034]
According to the seventh aspect of the present invention, the barrel-shaped rollers in the barrel-shaped roller train are linked in series by the roller coupling body, so that the central axis of the barrel-shaped rollers is orthogonal to the moving direction of the moving block. It is possible to guide accurately in the direction.
[Brief description of the drawings]
FIG. 1 is a front sectional view of a roller guide device according to Embodiment 1 of the present invention.
2A is a schematic perspective view of the apparatus of FIG. 1, and FIG. 2B is a partially cutaway side view of the apparatus of FIG.
3A is a cross-sectional view taken along line AA in FIG. 1, FIG. 3B is a cross-sectional view taken along line BB in FIG. 1, and FIG. 3C is a cross-sectional view taken along line CC in FIG. It is.
4A is a top view of the block main body of the moving block of the apparatus of FIG. 1, and FIG. 4B is a half showing the half of FIG. It is a cross-sectional side view.
FIG. 5 is a front view showing the resin molding part of the block main body part in FIG. 4 with half omitted.
FIG. 6 is a front view of a side cover of the moving block of FIG.
7 shows the configuration of the direction change path formed on the back surface side of the side cover of FIG. 6, where FIG. 7 (A) is a partial view and FIG. 7 (B) is the same view as FIG. BB sectional view, FIG. 10C is a sectional view taken along the line C-C of FIG. 11A, and FIGS. D to H illustrate the direction change piece of FIG. (D) is a front view, (E) is a side view, (F) is a bottom view, and (G) is a cross-sectional view taken along the line GG of FIG. (D). (H) is the HH sectional view taken on the line of FIG.
8 shows a roller coupling body of barrel-shaped rollers filled in the infinite circulation path of FIG. 3. FIG. 8 (A) is a partially omitted front view, and FIG. It is a figure which shows the barrel-shaped roller part of A).
FIG. 9 is a front sectional view of a roller guide device according to a second embodiment of the present invention.
FIG. 10 is a front sectional view of a roller guide device according to a third embodiment of the present invention.
[Explanation of symbols]
1 Roller guide device
2 recess
2a Inner circular arc surface
3 Track rail
3a Roller rolling surface
3b fixing hole
4,204,304 Horizontal part
204a, 304 recess
5 Convex
6 hanging part
7 Moving block
71 Block body
8 barrel roller
8a Center hole
9,10 Barrel-shaped roller train (side side
11 Barrel roller train (top side)
12 Infinite circuit
13 Roller rolling path
13a Roller rolling surface
13b Guide wall
14 Return passage
15 direction change path
16 Block body
16a Metal block part
16b Resin part
16c Bolt hole
17 Side lid
18 Information piece
20 Roller linkage
21 Storage hole
22 Spacer
23 Belt body
24 End face holding plate
25 engaging projection

Claims (7)

A track rail provided with concave portions extending in the longitudinal direction in a circular arc shape on the left and right side surfaces;
A horizontal portion facing the upper surface of the track rail, and a pair of left and right hanging portions that protrude downward from both ends in the width direction of the horizontal portion and have protrusions that are inserted into the recesses on the left and right side surfaces of the track rail. Moving block,
Upper and lower rows composed of a plurality of barrel-shaped rollers interposed between the concave portions on the left and right side surfaces of the track rail and the convex portions on the left and right hanging portions of the moving block so as to roll in the longitudinal direction of the track rail. A barrel-shaped roller train,
A roller guide device characterized in that the upper and lower barrel-shaped roller rows can slide along the inner circumferential arc surface of the recess of the track rail. The roller guide device according to claim 1, wherein a barrel-shaped roller row composed of a number of barrel-shaped rollers is interposed between opposing surfaces of the upper surface of the track rail and the horizontal portion of the moving block. The roller guide device according to claim 1, wherein the horizontal portion can be bent and deformed. 4. The concave portion for forming a gap allowing elastic deformation of the horizontal portion between the upper surface central portion of the horizontal portion and a mating mounting surface of a member to be mounted such as a table. The roller guide device described. The roller guide device according to claim 1, wherein the horizontal portion cannot be bent and deformed. The roller guide device according to claim 5, wherein a bolt fastening tap hole for fixing to a member to be attached such as a table is provided at a central portion of the upper surface of the horizontal portion. The roller guide device according to any one of claims 1 to 6, wherein the barrel rollers in the barrel roller row are chained in series by a roller coupling body.

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