JP3173820U - Cross roller guide - Google Patents

Abstract

The present invention provides a cross roller guide capable of increasing the load resistance performance of a cross roller guide by increasing the size of the guide roller without making the height of the prismatic guide rail redundant.
The surface of the retainer 104b is flattened to eliminate the bending process required for forming the tongue-like protrusions, and is required around the protrusion amount of the retainer protruding above and below the guide roller 103, that is, around the pocket processing part. The margin for leaving the outer periphery is reduced to a value t equivalent to the plate thickness. By holding the guide roller rotatably by the plastic deformation part formed in the pocket machining part of the retainer, the guide roller can be rotated while the width of the remaining margin of the outer periphery of the pocket machining part is maintained at a value t equal to the plate thickness. Can be retained.
[Selection] Figure 1

Description

  The present invention relates to an improvement of a cross roller guide, and more particularly to an improvement for realizing an increase in size of a guide roller without making the height of a prismatic guide rail that is the maximum outer shape of the cross roller guide redundant.

  At least two sets of guide rails comprising a plurality of guide rollers, a plate-like retainer for rotatably holding these guide rollers, and a pair of prismatic guide rails arranged in parallel with the guide rollers interposed therebetween A cross-roller guide provided with is already known as disclosed in Non-Patent Document 1 and Non-Patent Document 2, for example.

  FIG. 4 shows a general configuration example of this type of cross roller guide. FIG. 4 is a front sectional view showing an example of the cross roller guide 102 for guiding the linear movement of the table 101 placed on the base 100 of various measuring instruments or precision machine tools.

  As shown in FIG. 4, the cross roller guide 102 is parallel to a plurality of guide rollers 103, a plate-like retainer 104 for rotatably holding the guide rollers 103, and the guide roller 103 and the retainer 104 interposed therebetween. The two guide rail sets 107 are composed of a pair of prismatic guide rails 105 and 106 arranged in the vertical direction.

  As shown in FIG. 4, among the guide rail sets 107 of each set, the prismatic guide rails 105 are fixed to both sides of the base 100 on the fixed side with the V-grooves facing outward, while the prismatic guide rails 106 are The guide roller 103 interposed between the prismatic guide rails 105 and 106 is fixed to both sides of the table 101 which is the movable side with the V-grooves facing inward. By allowing the linear movement, the linear movement in the direction perpendicular to the paper surface of the table 101 with respect to the base 100 in FIG. 4 is smoothly guided.

  A set of guide rail sets 107 is taken out and the details of the structure are shown in FIGS.

  FIG. 5A is a front view showing a set of guide rail sets 107, and FIG. 5B is a plan view thereof. FIG. 5C is a right side view showing a state where the retainer 104 to which the guide roller 103 is attached is removed from the guide rail set 107 and the guide roller 103 is attached to the retainer 104, and FIG. 5D is a prismatic guide rail. It is sectional drawing which divided the guide rail set 107 by the plane orthogonal to the longitudinal direction of 105,106, and showed the internal structure. FIG. 6 is an enlarged view of each part of the retainer 104, and FIG. 7 is a detailed view of how the guide roller 103 is attached to the retainer 104.

  The retainer 104 shown in FIG. 5C has a function of preventing the guide roller 103 from falling off when the guide rail set 107 is assembled by holding a large number of guide rollers 103, and in particular, these guide rollers 103. Is held at a predetermined interval so as to be rotatable, thereby preventing contact between adjacent guide rollers 103 and damage to the guide rollers 103 due to this when the prismatic guide rails 105 and 106 are moved relative to each other. Is provided.

  As shown in FIG. 6, the retainer 104 has a plurality of pocket processing portions 108 having the same shape and the same dimensions for attaching the guide roller 103 by using sheet metal processing such as a press. The tongue-shaped projections 109 and 110 for supporting the end surface of the guide roller 103 attached to the pocket processing portion 108 are also integrally formed by pressing or the like.

  More specifically, one of the tongue-like projections 109 and 110 in each pocket processing portion 108 protrudes to the front surface side of the retainer 104 and the other protrudes to the back surface side of the retainer 104, and adjacent pocket processing. The portions 108 are bent at an angle of about ½ right angle so that the protruding directions are alternately reversed.

  That is, in the retainer 104 as shown in FIG. 6, one of the tongue-like projections 109 of the pocket processing portion 108 located at the odd number from the left is the surface of the retainer 104 as shown in FIG. If the other tongue-like projection 110 projects to the back side of the retainer 104 as shown in FIG. 7 (a), the pocket processing portion 108 positioned even-numbered from the left One tongue-like projection 109 projects to the back side of the retainer 104 as shown in FIG. 7B, and the other tongue-like projection 110 faces the surface of the retainer 104 as shown in FIG. 7B. It is a structure that protrudes to the side.

  Each guide roller 103 attached to the pocket processing portion 108 has an axial length d1 and a diameter d2 that are substantially the same for each individual, for example, as shown in FIG. The length d1 and the diameter d2 in the axial direction are common to all solids. That is, if the value corresponding to the axial length d1 of the guide roller 103 and the value corresponding to the diameter d2 are D, the axial lengths of all the guide rollers 103 are D, and at the same time, all the guide rollers 103 The diameter of the roller 103 is also D. Therefore, the cross-sectional shape when the guide roller 103 is divided by the plane including the rotation axis CL is a square rectangular cross section as shown in FIG. 7A or 7B.

  The pocket processing portion 108 of the retainer 104 is formed in a barrel shape as a whole as shown in FIG. 6, and the maximum width of the barrel portion is formed slightly larger than the above-mentioned dimension D, that is, the diameter D of the guide roller 103.

  Accordingly, in a state where the end surface of the guide roller 103 as shown in FIG. 7A is parallel to the paper surface of FIG. 6, that is, in a state where the rotation axis CL of the guide roller 103 is perpendicular to the surface of the retainer 104. The guide roller 103 can be inserted into the pocket processing unit 108.

  As an example, a state where the guide roller 103 is inserted into the pocket processing portion 108 located at the left end portion on the retainer 104 is indicated by a two-dot chain line in FIG.

  As is apparent from FIG. 6, in this state, the cross-sectional shape of the guide roller 103 having the retainer 104 as a virtual cutting surface is a perfect circle, and the guide roller 103 in FIG. The deviation is prevented by the left and right arc portions in the pocket processing portion 108.

  When the rotation axis CL of the guide roller 103 is inclined counterclockwise in FIG. 7A from this state, the cross-sectional shape of the guide roller 103 with the retainer 104 as a virtual cutting surface is While the horizontal width is maintained at the dimension D, the dimension is gradually increased in the vertical direction in FIG. 6 to change to an elliptical shape that is long in the vertical direction.

  On the other hand, the shape of the pocket processing portion 108 formed in a barrel shape as a whole is strictly a straight line that is orthogonal to the surface of the retainer 104 and connects the tongue-like projections 109 and 110 in the pocket processing portion 108. When the rotation axis CL of the guide roller 103 is tilted by ½ right angle with respect to the surface of the retainer 104 within the plane including the retainer 104, the cross-sectional shape of the guide roller 103 formed as a virtual cut surface is slightly larger. Since it is only formed large, the rotation axis CL of the guide roller 103 is further inclined by ½ right angle with respect to the surface of the retainer 104 as shown in FIG. When the rotation axis CL is inclined in the counterclockwise direction, the four corners 111 of the pocket processing portion 108 shown in FIG. To regulate the change in the attitude of the above. That is, the guide roller 103 shown in FIG. 7A is prevented from falling counterclockwise by the four corners 111 of the pocket processing portion 108 coming into contact with the outer peripheral surface of the guide roller 103.

  On the other hand, when the rotation axis CL of the guide roller 103 is inclined from the posture shown in FIG. 7A in the clockwise direction, the pocket as shown in FIG. The tongue-shaped projections 109 and 110 of the processing unit 108 support the both end surfaces of the guide roller 103, so that the posture change of the guide roller 103 is restricted.

  As a result, the lateral displacement of the guide roller 103 in FIG. 6, the inadvertent posture change that occurs on the rotation shaft of the guide roller 103 in FIG. 7A, and the guide roller with respect to the normal direction of the retainer 104 103 is displaced by the fact that the four corners 111 of the pocket processing portion 108 come into contact with the outer peripheral surface of the guide roller 103, and the tongue-like projections 109 and 110 of the pocket processing portion 108 support both end surfaces of the guide roller 103. This is maintained, and the guide roller 103 is rotatably held inside the pocket processing portion 108 while maintaining this state.

  When the guide roller 103 is inserted into the pocket processing portion 108 as described above and the rotation axis CL of the guide roller 103 is tilted counterclockwise in FIG. The tongue-like projections 109 and 110 of the processing unit 108 interfere with the outer peripheral surface of the guide roller 103. Since the tongue-like projections 109 and 110 are elastically deformable themselves, the tongue piece Although it is necessary to elastically deform the protrusions 109 and 110, the attaching operation itself of the guide roller 103 to the retainer 104 is possible.

  As already described, since the protruding directions of the tongue-like projections 109 and 110 are alternately reversed between the adjacent pocket processing portions 108, the pocket processing is positioned at odd numbers counted from the left end portion on the retainer 104. The attachment state of the guide roller 103 in the portion 108 is as shown in FIG. 7A, and the attachment state of the guide roller 103 in the even-numbered pocket processing portion 108 is shown in FIG. 7B. It will be like that.

  That is, in the retainer 104, as shown in FIG. 5C, the guide rollers 103 are aligned on a straight line with a certain interval, and the rotation axes CL of the guide rollers 103 adjacent to each other are shown in FIG. As shown in FIG. 7A and FIG. 7B, each guide roller 103 is rotatably held so as to have a twisting relationship corresponding to one right angle, and each guide roller 103 rotates each rotation. Positions corresponding to both ends of the diagonal line in the rectangular cross section of each guide roller 103 that includes the axis CL and is orthogonal to the direction in which the guide rollers 103 are arranged, that is, by a two-dot chain line in FIGS. 7A and 7B. In the square cross section of the guide roller 103 shown, the retainer 104 is rotatably held at positions corresponding to both ends of a diagonal line extending in the vertical direction.

  The large number of guide rollers 103 attached to the retainer 104 in this way are brought into contact with the inclined surfaces of the V-shaped grooves of the prismatic guide rails 105 and 106, as shown in FIG. 5 (d). In this manner, the retainer 104 is incorporated between the prismatic guide rails 105 and 106.

  A drop prevention screw 112 is screwed into both ends of the prismatic guide rails 105 and 106, and the heads of the drop prevention screws 112 block both ends of the V groove of the prismatic guide rails 105 and 106. The retainer 104 and the guide roller 103 incorporated between the guide rails 105 and 106 do not fall off from the end of the V groove.

  The state where the guide rail set 107 is attached to the base 100 and the table 101 is as shown in FIG.

  Finally, one of the prismatic guide rails 106 and 106 arranged outside the prismatic guide rails 105 and 106 constituting the guide rail set 107, for example, the prismatic guide rail 106 positioned on the right side in the example of FIG. Is pressed with a preload screw 113 screwed into the side wall of the table 101 so that the V-grooves of the prismatic guide rails 105 and 106 are pressed against the guide roller 103, and the outer peripheral surface and the end surface of the guide roller 103 are joined to the prismatic guide rail. Unintentional rattling is eliminated by contacting the slopes of the V-grooves 105 and 106 with a constant force.

  FIG. 8 shows the movable range of the prismatic guide rail 106 with respect to the prismatic guide rail 105, that is, the movable range of the table 101 with respect to the base 100.

  The configuration of the cross roller guide 102 constituted by the guide roller 103 and the retainer 104 and the prismatic guide rails 105 and 106 is as described above. In this type of cross roller guide 102, the structure of the retainer 104 is The height H of the prismatic guide rails 105 and 106 shown in FIG. 4, that is, the reduction of the separation distance H between the upper surface and the lower surface, which are two outer peripheral surfaces of the prismatic guide rail adjacent to the surface where the V groove is formed, There is a problem that it is difficult to increase the size of the guide roller 103 required for improving the load bearing performance of the cross roller guide 102.

Usually, the width of the margin for leaving the outer peripheral portion, which is required when punching a simple pocket processing portion in a metal plate using sheet metal processing such as pressing, is a value t equivalent to the thickness of the sheet metal used as a material.
However, in the pocket processing portion 108 as shown in FIG. 6, it is necessary to form tongue-like projections 109 and 110 on the upper and lower sides thereof. 7) or FIG. 7 (b), it is necessary to carry out the bending process redundantly. Therefore, it is necessary to prevent the outer peripheral part of the retainer 104 from being distorted by an external force or the like acting upon the bending process. The width of the remaining margin must be set to a value t ′ larger than the normal value t.

Therefore, in a situation where the height H of the prismatic guide rails 105 and 106 is limited, that is, in a situation where the width of the retainer 104 cannot be increased, the load resistance performance of the cross roller guide 102 is urged to reduce the size of the guide roller 103. Will fall.
Further, since the guide roller 103 is assumed to be large under the circumstances where sufficient load bearing performance is required, the width of the retainer 104 is inevitably increased, and the height H of the prismatic guide rails 105 and 106 is increased. Is redundant and the cross roller guide becomes large.

Nippon Thomson Co., Ltd., General Catalog CAT-1521 1, p495, 501-505 THK Corporation, Linear Motion System General Catalog Product Specifications, No. 401, pf8-9, f10-15

  Accordingly, an object of the present invention is to improve the load resistance performance of the cross roller guide by improving the inconvenience of the prior art and increasing the size of the guide roller without making the height of the prismatic guide rail redundant. Is to provide.

The cross roller guide of the present invention has a plurality of guide rollers whose axial length and diameter are substantially the same for each individual, and whose axial length and diameter are common throughout all the solids,
The guide rollers are arranged in a straight line at a constant interval, and the rotation axes of the guide rollers adjacent to each other are in a twisted relationship corresponding to one right angle. A plate-like retainer including pocket processing portions that are rotatably held at positions corresponding to both ends of a diagonal line in a rectangular cross section of each guide roller that includes each of the rotation shafts and is orthogonal to the direction of the straight line;
Comprising at least two guide rail sets comprising a pair of prismatic guide rails arranged in parallel with each other forming a V-groove on each of the opposing surfaces;
The guide rollers are arranged between the pair of prismatic guide rails so that the slopes of the V grooves in the prismatic guide rails are in contact with the outer peripheral surface and the end surface of the guide rollers, and the pair of corners are arranged. In the cross roller guide in which the retainer is disposed between the opposing surfaces of the columnar guide rail,
While flattening the front and back of the retainer,
The length and diameter in the axial direction of the guide roller are D, the gap dimension between the guide roller and the retainer required for the retainer to rotatably hold the guide roller is S, and the retainer is subjected to sheet metal processing. Necessary width of margin for outer peripheral portion required for pocket machining is a value t equal to the plate thickness. Necessary for performing pocket machining and bending by sheet metal machining on the retainer. Assuming that the width of the minimum margin for the outer peripheral portion is t ′ and the width of the retainer is H ′,
The dimension of the width H ′ of the retainer is S + 2t + D√2 ≦ H ′ <S + 2t ′ + D√2, and the distance between the two outer peripheral surfaces of the prismatic guide rails adjacent to the surface where the V-groove is formed Is equal to or greater than the dimension of the width H ′ of the retainer,
At a position corresponding to both ends of the diagonal line in a pocket processing portion formed for attaching the guide roller to the retainer,
A straight surface extending from one surface of the retainer to the central portion of the retainer thickness along the thickness direction of the retainer, and a taper inclined in a direction toward the central portion of the pocket processing portion while connecting to the straight surface and extending to the other surface of the retainer And a protrusion provided with a surface,
Both ends of the diagonal line in the rectangular cross section of each guide roller are formed by pressing the pressing tool from the one surface side of the retainer toward the protrusion, and the plastic deformation portion formed on the straight surface and the taper surface of the protrusion It has the structure characterized by being hold | maintained rotatably by.

Flatten the front and back of the retainer to eliminate the bending process required to form the tongue-shaped projections, and to increase the amount of protrusion of the retainer protruding above and below the guide roller, that is, the remaining margin of the outer periphery required around the pocket processing part. The guide roller can be increased in size by reducing it to a value t equivalent to the plate thickness.
Therefore, if the height of the prismatic guide rail is the same as that of the conventional product, the guide roller can be enlarged to improve the load bearing performance of the cross roller guide compared to the conventional product, and the required resistance If the load performance is equivalent to that of the conventional product, the height of the prismatic guide rail can be shortened and the cross roller guide can be made smaller than the conventional product.

Since the guide roller can be rotatably held by the taper surface of the protrusion formed on the pocket processing portion of the retainer and the plastic deformation portion formed on the straight surface of the protrusion, the cross roller guide can be assembled at the time of assembly. The guide roller is prevented from falling off, and the cross roller guide is easily assembled.
In addition, the guide roller is rotatably held by a plastic deformation portion formed in the pocket processing portion of the retainer instead of the conventional tongue-like projection that supports the end surface of the guide roller. The guide roller can be rotatably held while the width of the remaining portion is maintained at a value t equivalent to the plate thickness, and the redundancy of the protruding amount of the retainer protruding above and below the guide roller is avoided.

  According to the cross roller guide of the present invention, the guide roller can be increased in size without making the height of the prismatic guide rail redundant. Therefore, when the height of the prismatic guide rail is equal to that of the conventional product, the guide roller Can increase the load-bearing performance of the cross roller guide compared to the conventional product, and shorten the height of the prismatic guide rail if the required load-bearing performance is the same as the conventional product. The cross roller guide can be made smaller than the conventional product.

From the cross roller guide of one embodiment in which the front and back of the retainer are flattened in the cross roller guide in which the retainer is arranged between the opposing surfaces of the pair of prismatic guide rails, and the protrusion amount of the retainer protruding above and below the guide roller is minimized. It is the front sectional view which took out one set of guide rail sets and showed about the composition. FIG. 2A is a diagram showing the structure of the retainer required to reduce the width. FIG. 2A is a plan view of the guide roller by dividing the retainer on a plane that includes the rotation axis of the guide roller and is orthogonal to the direction of the guide roller arrangement. FIG. 2B is a side sectional view showing the retainer that has been attached, and FIG. 2B is a plan view showing a part of the retainer that has been attached to the guide roller. FIGS. 3A and 3B are views showing the structure of attaching the guide roller to the retainer, FIG. 3A is a cross-sectional view showing the retainer before attaching the guide roller, and FIGS. 3B and 3C are attaching the guide roller to the retainer. It is sectional drawing shown about the work process in that case. It is a front sectional view showing a typical configuration example of a cross roller guide. FIG. 5 (a) is a front view of a set of guide rail sets, FIG. 5 (b) is a plan view thereof, and FIG. 5 (c). Fig. 5D is a right side view showing a state in which the retainer with the guide roller attached is taken out of the guide rail set and the guide roller is attached to the retainer, and Fig. 5 (d) shows the guide rail set on a plane perpendicular to the longitudinal direction of the prismatic guide rail. It is sectional drawing which divided and showed the internal structure. It is the figure which expanded the retainer and showed each part of the retainer in detail. FIG. 7 is a diagram showing in detail the mounting state of the guide roller with respect to the retainer. Specifically, FIG. 7A shows the mounting state of the guide roller located at an odd number from one end of the retainer, and FIG. ) Is an attached state of the guide rollers which are located evenly from the one end of the retainer. It is the top view which showed the movable range of the movable side guide rail with respect to a fixed side guide rail, ie, the movable range of the table with respect to a base. The relationship between the height H of the prismatic guide rail and the height Hx of the conventional prismatic guide rail in the embodiment in which the amount of protrusion of the retainer protruding above and below the guide roller is minimized is shown using the roller diameter D as a parameter. It is a chart.

  Next, the best mode for carrying out the present invention will be specifically described with reference to the drawings.

  FIG. 1 is a cross of an embodiment in which a retainer is disposed between opposing surfaces of a pair of prismatic guide rails, and the retainer is flattened up and down to minimize the amount of protrusion of the retainer protruding above and below the guide roller. It is the front sectional view which took out one set of guide rail sets 107b from the roller guide, and showed the structure.

  A guide rail set 107b shown in FIG. 1 includes a plurality of guide rollers 103, a plate-like retainer 104b that rotatably holds the guide rollers 103, and V-grooves formed on the opposing surfaces in parallel. A pair of prismatic guide rails 105 and 106 are arranged.

  Regarding the structure of the guide roller 103 and the prismatic guide rails 105 and 106 and the structure for mounting the guide rail set 107b to the base 100 or the table 101 of a measuring instrument, precision machine tool, etc., refer to FIGS. Since this is the same as the case of the conventional cross roller guide 102 described in the technical section, a detailed description is omitted here. Further, the structure of the base 100 and the table 101 to which the two sets of guide rail sets 107b are attached will be described with reference to FIG.

  The plurality of guide rollers 103 attached to the retainer 104b are substantially the same in length and diameter in the axial direction for each individual as in the case shown in FIG. 7A or FIG. Throughout the solid, the axial length and diameter are common. Here, the length and diameter in the axial direction common to all the guide rollers 103 are defined as D.

  In the retainer 104b, the guide rollers 103 in FIG. 1 are arranged in a straight line at a certain interval in the direction perpendicular to the paper surface, and the rotation axis CL of the guide rollers 103 adjacent to each other is twisted to a right angle. In this way, each guide roller 103 is rotatably held, and each guide roller 103 includes a rotation axis CL in a rectangular cross section of each guide roller 103 orthogonal to the direction in which the guide rollers 103 are arranged. At positions corresponding to both ends of the diagonal line, that is, positions corresponding to both ends of the diagonal line extending in the vertical direction in the square rectangular cross section of the guide roller 103 shown in FIG. .

  Specifically, the inclination angle of the rotation shaft CL of each guide roller 103 with respect to the surface of the retainer 104b is 1/2 right angle in the clockwise direction or 1/2 right angle in the counterclockwise direction in FIG. The twist angle of the rotation axis CL between the guide rollers 103 adjacent to each other in the direction perpendicular to the paper surface is 1 right angle.

  The structure of the retainer 104b and the mounting structure of the guide roller 103 to the retainer 104b will be described with reference to FIGS.

  FIG. 2A is a side sectional view showing the retainer 104b in which the guide roller 103 has been attached by dividing the retainer 104b on a plane that includes the rotation axis CL of the guide roller 103 and is orthogonal to the direction in which the guide rollers 103 are arranged. FIG. 2B is a plan view showing a part of the retainer 104b after the guide roller 103 has been attached. FIG. 3A is a view showing the retainer 104b before the guide roller 103 is mounted by taking the same cross section as FIG. 2A, and FIG. 3B and FIG. It is the figure which took the same cross section as a) and showed the process of attaching the guide roller 103 to the retainer 104b.

  As shown in FIG. 2 (b), the retainer 104b has a plurality of pocket processing portions 108b having the same shape and the same dimensions for attaching the guide roller 103 by using a sheet metal processing such as a press. FIG. 3A shows the upper and lower sides of the pocket processing portion 108b, that is, positions corresponding to both ends of the diagonal line extending in the vertical direction in the square rectangular cross section of the guide roller 103 shown in FIG. As described above, the straight surface 3a extending from one surface of the retainer 104b to the center of the thickness of the retainer 104b along the thickness direction of the retainer 104b, and the pocket processing portion 108b while connecting to the straight surface 3a and extending to the other surface of the retainer 104b. A protrusion 3 having a tapered surface 3b that is inclined in a direction toward the central portion is integrally formed.

  As shown in FIG. 2 (b), the straight surfaces 3a of all the protrusions 3 provided for each pocket processing portion 108b are located on the same surface side of the retainer 104b, that is, on the surface side in FIG. 2 (b). The tapered surfaces 3b of all the protrusions 3 are located on the other surface side of the retainer 104b, that is, on the back surface side in FIG. 2B.

  The distance between the straight surfaces 3a and 3a of the protrusions 3 and 3 provided above and below the pocket processing portion 108b is a diagonal line extending in the vertical direction in the square rectangular section of the guide roller 103 shown in FIG. Length, that is, slightly longer than D√2. Here, if the gap dimension between the guide roller 103 and the retainer 104b required for rotatably holding the guide roller 103 in the pocket processing portion 108b is S, it is provided above and below the pocket processing portion 108b. The distance between the straight surfaces 3a and 3a of the projected portions 3 and 3 is approximately S + D√2. Further, the separation distance between the tips of the tapered surfaces 3b and 3b of the protrusions 3 and 3 provided above and below the pocket processing portion 108b is slightly shorter than D√2.

Accordingly, as shown in FIG. 3B, the guide roller 103 can be inserted into the pocket processing portion 108b in a state where the inclination angle of the rotation axis CL of the guide roller 103 with respect to the surface of the retainer 104b is ½ right angle. Is possible.
When the guide roller 103 is inserted into the pocket processing portion 108b in this way, one side of the boundary region between the outer peripheral surface and the end surface located at both ends of the guide roller 103 is projected as shown in FIG. It is supported by the tapered surfaces 3b, 3b of the portions 3, 3.

  Unlike the retainer 104 shown in FIG. 7, it is not necessary to attach the guide roller 103 while elastically deforming the tongue-like projections 109 and 110, and it is only necessary to insert the guide roller 103 into the pocket processing portion 108b. 103 is very easy to attach.

  Next, while maintaining this state, by pressing the pressing tools 5, 5 such as punches from the one surface of the retainer 104b, that is, the left surface in FIG. The plastic deformation portions 6 and 6 are formed by plastically deforming the periphery of the three straight surfaces 3a and 3a.

  As a result, the boundary area portion between the outer peripheral surface and the end surface located at both ends of the guide roller 103, in other words, the left and right sides of both ends of the diagonal line in the vertical direction in the rectangular cross section of the guide roller 103 are shown in FIG. 2 (a), the guide roller 103 is supported rotatably by the tapered surfaces 3b and 3b of the projections 3 and 3 and the plastic deformation portions 6 and 6, and is held in the pocket processing portion 108b. Become.

  The retainer 104b does not include the tongue-like protrusions 109 and 110 of the conventional retainer 104 shown in FIG. 6, and the retainer 104b is completely flat and does not require bending. Therefore, as shown in FIG. 2 (b), the width of the peripheral portion leaving margin required around the pocket processed portion 108b is the normal peripheral portion remaining width required when drilling a simple pocket processed portion. A value equivalent to the cost, that is, a value t equivalent to the thickness of the sheet metal used as a material is sufficient.

  In this embodiment, the length and diameter of the guide roller in the axial direction are D, and the gap dimension required for the retainer 104b to rotatably hold the guide roller 103 is S. Therefore, the width of the retainer 104b Is H ′, the retainer width H ′ can be shortened to S + 2t + D√2, as shown in FIG.

  There is no upper limit on the width H ′ of the retainer 104b as long as it exceeds S + 2t + D√2, but the conventional cross roller guide 102 described in the background section with reference to FIGS. In the cross roller guide provided with the tongue-like projections 109 and 110 formed by overlapping and bending, the retainer 104 has a tongue-like shape by overlapping the pocket processing and bending by sheet metal processing. The width of the retainer 104 is shortened to S + 2t ′ + D√2 at a minimum, where t ′ (where t ′> t) is the minimum width of the remaining margin required for forming the protrusions 109 and 110. It is possible to flatten the front and back of the retainer 104b to eliminate the bending process required to form the tongue-like projections 109 and 110. The configuration of the present embodiment in which the margin for leaving the outer peripheral portion required around the work portion 108b is reduced has a remarkable effect in terms of increasing the size of the guide roller 103 and shortening the height of the prismatic guide rails 105 and 106. Specifically, the width H ′ of the retainer 104b, the roller diameter D, the gap dimension S, the width t of the margin for leaving the outer periphery required when performing only the pocket machining, and the pocket machining overlap. Therefore, the relationship of the width t ′ of the margin of the outer peripheral portion required when bending is limited to a range in which the relationship of S + 2t + D√2 ≦ H ′ <S + 2t ′ + D√2 is satisfied.

  The retainer 104b assembled in this manner is arranged as shown in FIG. 1 between the opposing surfaces of the prismatic guide rails 105 and 106 arranged in parallel by forming V-grooves on the opposing surfaces. Then, the outer peripheral surfaces and end surfaces of a large number of guide rollers 103 attached to the retainer 104b come into contact with the V grooves of the prismatic guide rails 105 and 106.

  The distance between the two outer peripheral surfaces of the prismatic guide rails 105 and 106 adjacent to the surface where the V-groove is formed, that is, the height H of the prismatic guide rails 105 and 106 is the base 100 of the apparatus to which the cross roller guide is to be attached. In order to prevent the retainer 104b from interfering with the table 101, it is desirable to slightly exceed the width H ′ of the retainer. In practice, however, the assembly of the guide rail set 107b is completed and the base 100 and the table 101 are not assembled. When the attachment is completed, the guide rollers 103 are aligned in a complete straight line along the direction perpendicular to the paper surface of FIG. 1, and the retainer 104b is shown in FIG. In this manner, the retainer moves linearly integrally with the guide roller 103 while being suspended. It is unlikely that the upper end portion of 04b interferes with the table 101, and even if the lower end portion of the retainer 104b comes into sliding contact with the base 100, the pressing force acting at that time is only due to the weight of the retainer 104b. As a result, this does not damage the base 100.

  Therefore, the height H of the prismatic guide rails 105 and 106 may be substantially equal to the width H ′ of the retainer. As a result, the height H of the prismatic guide rails 105 and 106 is S + 2t + D√2. It can be shortened to the extent.

  In this way, the guide roller 103 is increased in size or the prismatic guide rails 105 and 106 by reducing the margin required for the retainer 104b by reducing the margin of the outer peripheral portion required around the pocket processing portion 108b. The height can be shortened.

  Therefore, when the height of the prismatic guide rails 105 and 106 is equal to that of the conventional product as shown in FIG. 5 (d), the guide roller 103 is enlarged and the load resistance performance of the cross roller guide is compared with that of the conventional product. If the required load-bearing performance is equivalent to that of the conventional product, the height of the prismatic guide rails 105 and 106 can be increased as shown in FIG. 5 (d). The crossed roller guide can be made smaller (thinner) than the conventional product by shortening it compared to the columnar guide rails 105 and 106.

The height Hx of the prismatic guide rails 105 and 106 in the conventional cross roller guide 102 described in the background section with reference to FIGS. 4 to 7 and the prismatic guide rail when the configuration of this embodiment is applied. An example of the relationship between the heights 105 and 106 and the height H is shown in FIG. In FIG. 9, the minimum requirement is required when mounting the guide roller 103 having the roller diameter D as well as the height Hx (conventional type) of the prismatic guide rail required at the minimum when the guide roller 103 having the roller diameter D is mounted. The height H of the prismatic guide rail (this embodiment) is made to correspond, and the relationship between the two is shown using the roller diameter D as a parameter.
For example, when the roller diameter D required for realizing the required load resistance is 3 mm, the height Hx is 8 mm and the height H is 5 mm. Therefore, the configuration of this embodiment is applied. The height can be reduced by 3 mm.
When the height Hx of the prismatic guide rails 105 and 106 and the height H of the prismatic guide rails 105 and 106 are both limited to 8 mm, the guide roller 103 with D = 3 mm is attached in the conventional configuration. Although it is a limit, when the configuration of the present embodiment is applied, it becomes possible to attach the guide roller 103 of D = 4 mm, and the load bearing performance can be improved without changing the height of the prismatic guide rail. I understand.

  Further, when the guide roller 103 is enlarged by maintaining the height of the prismatic guide rail equal to that of the conventional product, the preload screw of the table 101 is adjusted in accordance with the improvement of the load bearing performance accompanying the enlargement of the guide roller 103. 113 can be set to a high preload, so that the guide roller 103 that rolls between the V-grooves can be reliably prevented from rattling and the feeding accuracy of the table 101 can be improved. Resistance to impacts acting in the vertical direction is also improved.

  As described above, the example in which the guide rail sets 107a and 107b are attached has been described in which the inner prismatic guide rails 105 and 105a are fixed to the base 100 side and the outer prismatic guide rails 106 and 106a are fixed to the table 101. Of course, it is also possible to apply a configuration in which the inner prismatic guide rails 105 and 105a are fixed to the table 101 and the outer prismatic guide rails 106 and 106a are fixed to the base 100.

  In particular, in a configuration in which two sets of cross roller guides are superposed in the vertical direction to guide the table, for example, an XY table, the diameter D of the guide roller 103 is maintained and the height of the prismatic guide rail is set to Hx. The effect of downsizing (thinning) when the length is shortened from H to H is great.

3 Protruding part 3a Straight surface 3b Tapered surface 5 Pressing tool (punch)
6 Plastic deformation portion 100 Base 101 Table 102 Cross roller guide 103 Guide rollers 104, 104b Retainers 105, 105a Square columnar guide rails 106, 106a Square columnar guide rails 107, 107a, 107b Guide rail sets 108, 108b Pocket machining portions 109, 110 Tongue-like projections 111 Four corners 112 of the pocket processing part Fall-off prevention screw CL Rotating shaft

Claims (1)

A plurality of guide rollers having an axial length and a diameter that are substantially the same for each individual, and having a common axial length and diameter throughout all the solids,
The guide rollers are arranged in a straight line at a constant interval, and the rotation axes of the guide rollers adjacent to each other are in a twisted relationship corresponding to one right angle. A plate-like retainer including pocket processing portions that are rotatably held at positions corresponding to both ends of a diagonal line in a rectangular cross section of each guide roller that includes each of the rotation shafts and is orthogonal to the direction of the straight line;
Comprising at least two guide rail sets comprising a pair of prismatic guide rails arranged in parallel with each other forming a V-groove on each of the opposing surfaces;
The guide rollers are arranged between the pair of prismatic guide rails so that the slopes of the V grooves in the prismatic guide rails are in contact with the outer peripheral surface and the end surface of the guide rollers, and the pair of corners are arranged. In the cross roller guide in which the retainer is disposed between the opposing surfaces of the columnar guide rail,
While flattening the front and back of the retainer,
The length and diameter in the axial direction of the guide roller are D, the gap dimension between the guide roller and the retainer required for the retainer to rotatably hold the guide roller is S, and the retainer is subjected to sheet metal processing. Necessary width of margin for outer peripheral portion required for pocket machining is a value t equal to the plate thickness. Necessary for performing pocket machining and bending by sheet metal machining on the retainer. Assuming that the width of the minimum margin for the outer peripheral portion is t ′ and the width of the retainer is H ′,
The dimension of the width H ′ of the retainer is S + 2t + D√2 ≦ H ′ <S + 2t ′ + D√2, and the distance between the two outer peripheral surfaces of the prismatic guide rails adjacent to the surface where the V-groove is formed Is equal to or greater than the dimension of the width H ′ of the retainer,
At a position corresponding to both ends of the diagonal line in a pocket processing portion formed for attaching the guide roller to the retainer,
A straight surface extending from one surface of the retainer to the central portion of the retainer thickness along the thickness direction of the retainer, and a taper inclined in a direction toward the central portion of the pocket processing portion while connecting to the straight surface and extending to the other surface of the retainer And a protrusion provided with a surface,
Both ends of the diagonal line in the rectangular cross section of each guide roller are formed by pressing the pressing tool from the one surface side of the retainer toward the protrusion, and the plastic deformation portion formed on the straight surface and the taper surface of the protrusion A cross roller guide, wherein the cross roller guide is rotatably held by the roller.

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