JP3251813B2 - Method of forming a moving block of a rolling 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 method for forming a moving block of a rolling guide device configured to movably support a moving block on a track rail via a ball.

[0002]

2. Description of the Related Art A conventional rolling guide device of this type generally has a structure in which a moving block is movably supported by a track rail and a plurality of rows of balls. The moving block is provided with a ball return path for infinite circulation of the row of balls. At both ends of the moving block, a direction changing path for turning the row of balls interposed between the track rail and the moving block into a ball return path. Is attached. Further, the moving block is provided with a ball holding member for preventing the balls from falling along the plurality of ball rows.

[0003] Conventionally, the cost of the ball holding portion, side cover and ball return passage, which do not require high rigidity, has been reduced as a resin molded product.

However, each of the above-mentioned conventional resin molded parts is a molded article separate from the outer cylinder, and requires an assembling process after being molded separately.

[0005] Therefore, it is conceivable to reduce the assembling process by integrally molding the ball holding portion and the outer cylinder.

As such an integral molding technique, for example, a linear motion ball bearing as disclosed in US Pat. No. 4,128,279 is known.

This linear motion ball bearing is shown in FIG.
As shown in FIG.
01 and a shaft 105 inserted into the outer cylinder 101.

[0008] During this inner sleeves 101 circumference and shaft 105 outer periphery, a number of balls 104 arranged in the axial direction is interposed, through the ball 104, linear motion sleeves 101 along the axis 105 It is supposed to. The ball 104
A plurality of rows are provided in the circumferential direction of the outer cylinder 101, and each ball row is provided with a direction change path 108 at both ends of the outer cylinder 101 and the outer cylinder 10.
It circulates through a plurality of no-load ball passages 110 provided on one outer peripheral side. Outer cylinder 101 and shaft 10
The balls 104 in the load region interposed between the ball rows 5 are held on both sides of the ball row by ball holding portions 106 extending along the axial direction.

The ball holding portion 106, the inner peripheral portion 108a of the turning path 108 and the no-load ball passage 11
No. 0 was integrally formed with the outer cylinder 101 by insert molding.

[0010]

However, in the case of the above-mentioned conventional linear motion ball bearing, at the time of insert molding, for example, as shown in FIG. The outer cylinder 10 is
The inner circumference of the first cylinder 1 is brought into close contact with the second mold 112 to form the ball holding portion 106 and the cavities 106a and 110a for forming the no-load ball passage 110.
It is difficult to accurately and closely contact the inner and outer circumferences of the first and second molds 111 and 112, and there is a problem that a gap is formed between the contact surfaces and burrs are generated.

In particular, the inner circumference of the outer cylinder 101 and the second mold 112
When burrs are generated between the contact surfaces of the load balls, burrs are generated on the load ball rolling surface, and it is necessary to remove the burrs. However, it is very difficult and practically impossible to remove such burrs generated inside the ball holding portions 106 and 106.

When such burrs are present, the ball 10
Since the circulation of No. 4 is deteriorated, the feeding accuracy is deteriorated. In severe cases, the balls 104 become jammed and the machine stops, which has a significant impact on productivity.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to accurately set the position of a resin portion formed on a moving block and to form a rolling guide that can be integrally formed. An object of the present invention is to provide a method of forming a moving block of an apparatus.

[0014]

In order to achieve the above-mentioned object, the present invention provides a track rail and two rows of balls on the upper surface side of the track rail, and four rows of balls each having one row on the left and right side faces. A moving block having a U-shaped cross section movably supported by a track rail via a row, and a moving block provided between opposing surfaces of the track rail and the moving block to guide the four rows of balls. Four ball rolling grooves formed, four rows of ball return passages provided in the moving block corresponding to the four rows of balls, provided at both ends of the moving block and moving with the track rail. A side cover provided with a turning path for turning a row of balls interposed between blocks into a ball return path, and a ball holding provided along the four rows of balls of the moving block to prevent the rows of balls from falling off And a member, At least one of the return path forming member that forms the ball return path, the ball holding member, and the directional turning path inner peripheral portion forming member that forms the directional turning path inner peripheral portion, the moving block is placed in the mold. A method of forming a moving block of a rolling guide device, which is integrally formed with a moving block by insert molding to be arranged, wherein the insert molding is substantially performed on the inner periphery of the mold in correspondence with a ball rolling groove of the moving block. The present invention is characterized in that four supporting projections having the same radius of curvature and having an arc-shaped cross section are provided, and the moving block is positioned in the mold by fitting ball rolling grooves into the supporting projections.

A track rail; a movable block having a U-shaped cross section movably supported on the track rail via a total of four rows of balls, two rows of upper and lower rows on the left and right sides of the track rail; Four ball rolling grooves formed corresponding to each other and provided between the track rail and the opposing surface of the moving block so as to guide the row of balls, and the moving block corresponds to the four rows of ball rows. A side cover provided with four rows of ball return passages provided at both ends of the moving block, and a direction changing path for turning a row of balls interposed between the track rail and the moving block into a ball return path. ,
A ball holding member provided along the four ball rows of the moving block to prevent the ball row from falling off, and a return path forming member that forms the ball return path; a ball holding member; A method of forming a moving block of a rolling guide device in which at least one of the direction changing path inner peripheral portion forming members forming the portion is integrally formed with the moving block by insert molding in which the moving block is disposed in a mold. At the time of the insert molding, supporting protrusions having an arc-shaped cross section having substantially the same radius of curvature as the balls are provided at four locations on the inner periphery of the mold corresponding to the ball rolling grooves of the moving block. The moving block is positioned in the mold by fitting a ball rolling groove into the convex portion.

A track rail, a row of balls provided on one of the left and right shoulders of the track rail, and a side of the left and right sides of the track rail opposite to the ball row. And a moving block having an L-shaped cross section movably supported via a single row of balls provided on the track rail and an opposing surface of the moving block to guide the two rows of balls. Two ball rolling grooves formed corresponding to each other, and the moving block
Two rows of ball return passages provided corresponding to the rows of ball rows, and a direction change that is provided at both ends of the moving block and turns a ball row interposed between the track rail and the moving block into a ball return path. A return path forming member for forming the ball return path, comprising: a side lid provided with a path; and a ball holding member provided along four ball rows of the moving block to prevent the ball row from falling off. A rolling guide in which at least one of the holding member and the turning path inner peripheral portion forming member forming the turning path inner peripheral portion is integrally formed with the moving block by insert molding in which the moving block is disposed in a mold. A method of forming a moving block of an apparatus, wherein the insert molding is substantially the same as the ball corresponding to a ball rolling groove of the moving block on an inner periphery of the mold. Provided supporting convex portion of the circular arc cross sectional shape having a radius of curvature in two places, characterized by positioning the movable block in a mold by fitting the ball rolling grooves in the support protrusion.

A track rail, a moving block having a U-shaped cross section movably supported on the track rail via a total of two rows of balls on each of the left and right side surfaces of the track rail;
Two ball rolling grooves formed corresponding to each other and provided between the track rail and the opposing surface of the moving block to guide the row of balls; A side provided with two rows of ball return passages provided correspondingly, and a direction change path provided at both ends of the moving block for turning a row of balls interposed between the track rail and the moving block into a ball return path. With a lid,
Insert molding in which at least one of the return passage forming member forming the ball return passage and the turning path inner peripheral portion forming member forming the turning path inner peripheral portion is disposed in a mold with a moving block. A method of forming a moving block of a rolling guide device integrally formed with a moving block by the above method, wherein in the insert molding, a radius of curvature substantially the same as that of the ball corresponding to a ball rolling groove of the moving block is formed on an inner periphery of the mold. A support projection having an arc-shaped cross section having two positions is provided, and the moving block is positioned in the mold by fitting a ball rolling groove into the support projection.

In the contact state between the ball rolling groove of the moving block and the supporting protrusion of the mold, a gap that can prevent the intrusion of the molding material is set to an allowable range.

Further, the outer periphery of the moving block is ground and finished on the basis of the ball rolling groove, and thereafter, the moving block is disposed in the mold with the ball rolling groove as a reference and insert molding is performed. I do.

[0020]

According to the first or second aspect of the present invention, the two sets of ball rolling grooves on the left and right sides of the moving block are provided on a supporting projection of a mold having an arc-shaped cross section having a radius of curvature substantially equal to the radius of curvature of the ball. Mated. Therefore, the moving block is reliably supported without rattling at four points by the two sets of left and right supporting projections in the mold.

According to the third aspect of the present invention, the moving block having an L-shaped cross section can be reliably prevented from rattling by a set of left and right supporting projections vertically separated from each other in the mold in the horizontal direction. Supported by

Further, according to the fourth aspect of the present invention,
The moving block is securely supported by a pair of left and right supporting projections without play.

As described above, according to the first to fourth aspects of the present invention, in the mold, the moving block is securely supported by the supporting projection fitted into the ball rolling groove, so that the filling pressure of the molding material is increased. Act on the moving block, the moving block is stably held at the predetermined position. Therefore, the ball return path forming member, the ball holding member, or the ball direction changing path inner circumferential forming member can be accurately formed on the moving block, and the space between the direction changing path and the ball rolling groove, the direction changing path and the ball return path can be formed. There is no step between the rolling elements, the rolling elements are smoothly circulated, and noise is reduced.

Further, since the supporting projection is formed in an arc shape and is fitted into the ball rolling groove, it is possible to prevent burrs in the ball rolling groove.

In order to prevent burrs, if the gap between the ball rolling groove of the moving block and the supporting protrusion of the mold is set to an extent that it is possible to prevent the intrusion of the molding material into the mold, it is possible to reduce the burrs. The mold can be easily manufactured.

If the moving block to be subjected to insert molding is ground on the basis of the rolling groove of the rolling element, the gap between the outer periphery of the moving block inserted into the mold and the contact surface between the mold is minimized. Can be set small, and the occurrence of burrs on the outer peripheral side can also be prevented.

Here, in order to prevent burrs, it is not necessary that the contact surface between the moving block and the supporting protrusion of the mold is completely in contact with each other. It is sufficient if the size can be prevented.

As described above, if the gap is set between the mold and the moving block, the mounting of the moving block is facilitated, and the occurrence of burrs can be prevented. If burrs are formed in the ball rolling groove, the burrs cannot be removed, and the moving block must be broken to remove the burrs. Therefore, it is extremely important to prevent the generation of burrs.

In particular, if a slight gap is allowed between the ball rolling groove and the mold to the extent that the molding material can be prevented from entering, the processing accuracy requirement at the time of grinding the ball rolling groove is reduced. it can.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments.

(First Embodiment) FIGS. 1 and 2 show a rolling guide device according to a first embodiment of the present invention.

As shown in FIG. 1 (a), the rolling guide device 1 comprises a track rail 2 and two rows of balls 3 on the upper side of the track rail 2 and four rows of balls 3 on the left and right side faces. And a movable block 4 having a U-shaped cross section that is movably supported by the track rail 2 via the rail.

The track rail 2 is a long member formed in a substantially rectangular cross section, and the upper half of the left and right side surfaces has a tapered surface 21 which gradually projects outward as going upward. Ball rolling grooves 5 as ball rolling grooves are provided on the tapered surface 21 one by one on the left and right. Also,
The upper surface of the track rail 2 is a flat surface, and 1
A total of two ball rolling grooves 6 are provided.

The moving block 4 is a highly rigid block having a U-shaped cross section, and has a horizontal portion 41 facing the upper surface of the track rail 2.
And a pair of legs 42 extending downward from both left and right ends of the horizontal portion 41 so as to sandwich the left and right sides of the track rail 2. A pair of ball rolling grooves 7, 7 corresponding to a pair of ball rolling grooves 5, 5 formed on the upper surface of the track rail 2 is provided on the lower surface of the horizontal portion 41, and left and right leg portions 42, 42 are provided. On the inner surface, ball rolling grooves 8, 8 corresponding to the ball rolling grooves 5, 5 formed on the left and right side surfaces of the track rail 2 are provided one by one.

A large number of balls 3 are interposed between the corresponding four sets of ball rolling grooves 5, 8; 6, 7 provided between the moving block 4 and the opposing surfaces of the track rail 2. And a ball train for applying a load acting between the moving blocks 4. A predetermined preload is applied to the ball 3. As the ball, a roller or the like can be applied in addition to the ball 3.

Ball rolling grooves 5, 8; 6, 7 of each ball 3
The contact angle line L1 connecting the contact points with the ball 3 interposed between the upper surface of the track rail 2 and the horizontal portion 41 of the moving block 4 is approximately 9 degrees with respect to the horizontal line H passing through the center of the ball 3.
The ball 3 which is set to about 0 ° and is interposed between the left and right side surfaces of the track rail 2 and the left and right legs 42, 42 of the moving block 4 is positioned at the center of the track rail 2 with respect to a horizontal line H passing through the center of the ball 3. , And two rows of balls 3 on the left and right sides and 2 on the top side.
The upper and lower left and right corners 22 of the track rail 2 are sandwiched between the rows of balls 3.

The moving block 4 includes the four rows of balls 3.
There are provided four ball return passages 9 for guiding circulation of the ball. The ball return passage 9 is constituted by a hole that extends linearly in parallel with each of the ball rolling grooves 5 and 6 provided in the moving block 4, and has two horizontal and right and left leg portions 4 in the horizontal portion 41.
2 is provided two by two.

The horizontal portion 41 of the moving block 4 is provided with a through hole 43 having a diameter larger than the passage cross section of the ball return passage 9.
A first pipe portion 91 made of resin as a return passage forming member for forming the first pipe is integrally joined.

On the other hand, an arc-shaped concave portion 44 is provided at the lower end corner of the outer surface of the left and right leg portions 42 of the moving block 4, and a second resin pipe portion 92 forming the ball return passage 9 is formed in the concave portion 44. They are integrally joined. The second pipe portion 92 is continuous with a thick bottom resin portion 93 covering the lower end surface of the leg portion 42 and a side resin portion 94 covering the lower end portion of the outer surface of the leg portion 42. At the upper end of the side resin portion 94, an engagement protrusion 94a is provided to engage with the engagement groove 42a provided on the outer surface of the leg portion 42.

Also, at both ends of the moving block 4, FIG.
As shown in FIGS. 2 (b) and 2 (c) and FIG.
A side lid 11 constituting a U-shaped pipe-shaped turning path 10 for changing the direction is attached. The outer cover 10a of the U-shaped pipe-shaped turning path 10 is provided on the side lid 11 itself.
Only are formed. At both ends of the moving block 4, a direction change path inner peripheral piece 12 as a direction change path inner circumference forming member that forms the direction change path 10 inner peripheral portion 10 b is integrally joined. The direction change path 10 is constituted by the direction change path inner peripheral piece 12. In the drawing, reference numeral 11a denotes an end seal for sealing a gap with the track rail 2, and 11b denotes a grease nipple.

As shown in FIG. 1A, the moving block 4 is provided with balls for preventing the balls 3 from falling off when the moving blocks 4 are removed from the track rails 2 along the four rows of balls 3. A holding member 13 is provided. The ball holding member 13 is made of resin and has a first retainer portion 13a integrally joined to the lower surface of the horizontal portion 41;
Left and right second retainer portions 13b integrally joined to the concave corners of the second and second left and right third retainer portions 13c integrally joined to the lower end portions of the inner side surfaces of the left and right leg portions 42; It is composed of The third retainer portion 13c is continuous with a lower end covering portion 93 that covers the lower end portion of the leg portion 42, and is integrated with the second pipe portion 92.

The track rail 2 is located between the left and right ends of the first retainer 13a and the upper end of the second retainer 13b.
The two rows of balls 3 located on the upper surface are held,
Two rows of left and right balls 3 are held on the left and right side surfaces of the track rail 2 between the retainer portion 13b and the third retainer portion 13c.

Then, the first and second pipe portions 91 and 92 as the above-mentioned return passage forming member, the ball holding member 13
The first to third retainer portions 13a and 13b and the inner peripheral piece portion 12 of the direction change path are all integrally formed with the moving block 4.

In this integral molding, the moving block 4 is arranged in the mold with reference to the ball rolling groove 7 provided in the moving block 4, and the resin molding to be molded between the inner wall of the mold and the moving block 4 is performed. A cavity corresponding to the portion is formed, and a molding material is filled into the cavity to perform molding.

FIG. 3 is a schematic diagram showing the closed state and the open state of the movable block 4 and the mold 14 during insert molding. The fixed mold 14a is provided with a positioning support protrusion 14b into which the ball rolling grooves 7 and 8 are fitted.
Is provided with a pin 14d for forming the ball return passage 9. The supporting projection 14b is a projection having an arc-shaped cross section having a radius of curvature substantially equal to the radius of curvature of the ball 3,
They extend linearly parallel to each other. Incidentally, FIGS. 3 (b) and 3 (c)
Is shown only around the ball return passage 9 on the leg 42 side.

The cavity 15a for forming the first pipe portion 91 is formed in the through hole 43 of the horizontal portion 41 of the moving block 4, and the second pipe portion 92 is formed outside the concave portion at the outer corner of the leg 42. Cavities 15b are formed in the inner periphery of the horizontal portion 41 and the leg portion 42 in the first to third retainer portions 1.
Cavities 15c-15 for molding 3a-13c
In each of the front and rear ends of the moving block 4, cavities 15f for forming the inner circumferential piece 12 of the direction change path are provided.

In this embodiment, the two sets of left and right ball rolling grooves 7, 8; 7, 8 of the moving block have a convexity supporting the mold 14 having an arc-shaped cross section having a radius of curvature substantially equal to the radius of curvature of the ball 3. The moving block 4 is securely supported at four points by sandwiching the two sets of left and right support projections 14b vertically and horizontally.

Therefore, the cavity 15a for molding the first pipe portion 91, the cavity 15b for molding the second pipe portion 92, and the first to third retainer portions 13a
Cavities 15c to 15e for molding １３13c,
Further, the position of the cavity 15f on the moving block 4 for molding the inner peripheral piece 12 of the turning path is accurately determined. As a result, the direction between the inner peripheral piece 12 of the turning path and the ball rolling grooves 7, 8 and the direction are determined. There is no step due to an assembling error at the joint between the ball inner passage piece 12 and the ball return passage 9 formed by the first and second pipe parts 91 and 92, and the circulation of the ball 3 is smooth. Also, the generation of noise is reduced.

Further, since the support projection 14b having an arc-shaped cross section is fitted into the ball rolling grooves 7, 8, the molding material is prevented from penetrating into the inner periphery of the ball rolling grooves 7, 8, and the ball rolling is prevented. Burrs do not occur in the moving grooves 7 and 8.

Here, in order to prevent burrs, the contact surfaces between the ball rolling grooves 7, 8 of the moving block 4 and the respective supporting projections 14b of the mold 14 do not need to be completely in contact with each other. Even if the gap is open, it is within an allowable range as long as the gap is large enough to prevent the intrusion of the molding material. As described above, if a small gap is provided between the supporting protrusion 14b of the mold 14 and the ball rolling grooves 7 and 8 of the moving block 4, the mounting of the moving block 4 becomes easy and the generation of burrs is prevented. be able to.

Further, if the outer periphery of the moving block 4 to be subjected to insert molding is ground with reference to the ball rolling grooves 7 and 8, the outer periphery of the moving block 4 inserted into the mold 14 and the inner peripheral wall of the mold 14 are formed. The gap between the contact surfaces can be set as small as possible, and the occurrence of burrs on the outer peripheral side can be prevented.

In this embodiment, the first and second pipe portions 91 and 92 as ball return passage forming members, the first and second and third retainer portions 13a to 13c as ball holding members, and the inside of the direction changing path. Although all of the direction change path inner peripheral piece 12 as the peripheral part forming member is integrally formed with the moving block 4 by insert molding, at least one may be insert molded.

(Second Embodiment) FIG. 4 shows a rolling guide device according to a second embodiment of the present invention.

The rolling guide device 1 includes a track rail 20
And a movable block 204 having a U-shaped cross section movably supported by the track rail 202 via four rows of balls 203, two rows in the upper and lower directions, on the left and right side surfaces of the track rail 202.
, Is provided.

The track rail 202 is a long member formed in a substantially rectangular cross section, and a ridge 2021 is provided on the left and right sides thereof so as to protrude outward. Ball rolling grooves 205, 2 as
06 is provided.

The moving block 204 is a highly rigid block body having a U-shaped cross section. The moving block 204 has a horizontal portion 2041 facing the upper surface of the track rail 202 and the left and right side surfaces of the track rail 202 are sandwiched from both left and right ends of the horizontal portion 2041. And a pair of legs 2042 extending downward.
Two ball rolling grooves 207 and 208 corresponding to the ball rolling grooves 205 and 206 formed on the left and right side surfaces of the track rail 202 are provided on the inner surfaces of the left and right leg portions 2042.

A large number of balls 203 are interposed between the corresponding four sets of ball rolling grooves 205, 208; 206, 207 provided between the opposing surfaces of the moving block 204 and the track rail 202 so that a large number of balls 203 are interposed therebetween. And a moving ball block for applying a load acting between the moving block 204 and the moving block 204. A predetermined preload is applied to the ball 203. As the rolling element, a roller or the like can be applied in addition to the ball.

The ball rolling grooves 205 and 2 of each ball 203
08; the contact angle line connecting the contact points of 206 and 207 has a structure inclined toward the center of the track rail 202 in a direction to close to the horizontal line H, and the contact angle is set to approximately 45 °. .

The left and right legs 2042 of the moving block 204 are provided with four ball return passages 209 for circulating and guiding the four rows of balls. Ball return passage 2
Reference numeral 09 denotes a hole that extends linearly in parallel with each of the ball rolling grooves 207 and 208 provided in the moving block 204.

A rectangular notch 2043 is provided on the outer surface of the left and right leg portions 2042 of the moving block 204, and a resin return path forming member 2091 for forming a ball return path 209 is integrally formed in the notch 2043. Is joined to. The return passage forming member 2091 is provided with two upper and lower ball return passages 209, 209.

The return passage forming member 2091 includes a leg 2042.
Is continuous with the end surface resin portion 2092 which covers the lower end surface.

At both ends of the moving block 204, a ball 203 interposed between the track rail 202 and the moving block 204 is turned into a ball return path 209.
A side lid 211 constituting a U-shaped pipe-shaped direction change path 210 is attached. Only the outer peripheral portion 210a of the U-shaped pipe-shaped direction change path 210 is formed on the side cover 211 itself. Further, at both ends of the moving block 204, a directional turning path inner peripheral piece portion 212 as a directional turning path inner peripheral forming member that forms the directional turning path 210 inner peripheral portion 210b is integrally joined. The direction change path 210 is constituted by the direction change path inner peripheral piece 212.

The moving block 4 is mounted on the track rail 20 along the four rows of balls 203.
A ball holding member 213 is provided to prevent the ball 203 from falling off when the ball 203 is removed from the ball 2. Ball holding member 21
Reference numeral 3 denotes a resin, and a first retainer portion 213a integrally joined to the left and right corners of the lower surface of the horizontal portion 2041 and a left and right first joints integrally joined to the inner surface central portions of the left and right legs 242. The left and right third retainer portions 213 integrally joined to the two retainer portions 213b and the lower end portions of the inner side surfaces of the left and right leg portions 242.
c. This third retainer part 213
c is a lower end covering portion 209 covering the lower end of the leg portion 242.
2 and is integrated with the ball return passage forming member 2091.

The upper stage 2 is located between the left and right ends of the first retainer 213a and the upper end of the second retainer 213b.
The rows of balls 203 are held, and the left and right second retainer portions 2
Two rows of left and right balls 203 are held on the left and right side surfaces of the track rail 202 between the first retainer 13b and the third retainer portion 213c.

The return passage forming member 20
9, first to third retainer portions 213a to 213c as ball holding members 213 and inner circumferential piece portions 2 for direction change paths
All 12 are integrally formed with the moving block 204.

In this integral molding, the moving block 204 should be arranged in the mold with reference to the ball rolling grooves 207 and 208 provided in the moving block 204, and the molding should be performed between the inner wall of the mold and the moving block 204. A cavity corresponding to the resin molding portion is formed, and the cavity is filled with a molding material and molded by insert molding.

FIG. 6 is a schematic diagram showing a fitting state of the moving block 204 and the mold 214 during insert molding. The fixed mold 214a is provided with a positioning support protrusion 214b into which the ball rolling grooves 207 and 208 are fitted, and the movable mold 214c is provided with a pin 214d for forming a ball return passage 209.

A cavity 215a for forming the return passage forming member 2091 is formed in the notch 2043 of the left and right leg portions 2042, and first to third retainer portions 213a to 213a are formed in the inner periphery of the horizontal portion 241 and the leg portion 242. Cavities 215b to 215d for molding 213c
Cavities 215 e for molding the direction change path inner peripheral piece portion 2012 are provided at both front and rear ends of 04, respectively.

Also in this embodiment, the two sets of left and right ball rolling grooves 207, 208; 207, 208 of the moving block 204 support the mold 214 having an arc-shaped cross section having a radius of curvature substantially equal to the radius of curvature of the ball 203. The projection 214b is fitted. Therefore, the moving block 204 is supported at four points by sandwiching the two sets of left and right supporting projections 214b in the vertical and horizontal directions. Stable positioning without backlash is achieved even for moment loads that rotate around parallel axes.

As described above, the support protrusion 214b is fitted into the ball rolling grooves 207 and 208, and the moving block 204 is stably positioned in the mold 214 without rattling. , 208 are not burred.

A cavity 215a for forming the ball return passage forming member 2091 and a cavity 2 for forming the first to third retainer portions 213a to 213c are formed.
15c to 215e, and further, the inner peripheral piece 21 of the turning course
The positional relationship between the cavity 125f and the moving block 204 for molding No. 2 is accurately determined.

In particular, in this embodiment, the ball rolling grooves 20
7, 208 are positioning support projections 2 provided on the mold.
14b, the moving block 20
No matter which direction the injection pressure of the molding material acts on the support member 4, the support member 214b for positioning can be supported without rattling, and the return path forming member 2091, the direction change path inner peripheral piece 212 and the ball Each of the retainer portions 213a to 213c of the holding member can be accurately formed at a predetermined position.

Other functions and effects are the same as in the first embodiment.

FIG. 13 shows a modification of the second embodiment.

In a first modification shown in FIG. 13A, ball rolling grooves 207 and 208 having an arc-shaped cross section are formed in the upper and lower two rows of the moving block 204 on the inner circumferences of the left and right legs 2041 and 2042, respectively. is there. Upper and lower ball rolling grooves 207, 20
8 and a ball return passage 209 provided in the moving block 204 is formed by a pipe portion 2093 integrally formed on the inner periphery of the through-hole. Since other configurations and operations are the same, the same components are denoted by the same reference numerals and description thereof will be omitted.

In the second modification shown in FIG. 13B, ball rolling grooves 207 and 208 having an arc-shaped cross section are formed in the upper and lower two rows of the moving block 204 at the inner periphery of both the right and left legs 2041 and 2042. This is the same as the first modification in that the contact angle lines L2, L2 of the two sets of left and right two rows of balls 203 have an inward opening structure that opens toward the center of the track rail 202. The second modification differs from the first modification in that a retainer 213b for preventing the ball 203 from dropping is provided between the upper and lower two ball rolling grooves 207 and 208 due to the contact angle structure.

The other structure and operation are completely the same as those of the second embodiment, so that the same components are denoted by the same reference numerals and description thereof will be omitted.

(Third Embodiment) FIG. 7 shows a rolling guide device according to a third embodiment of the present invention.

The rolling guide device 301 includes a track rail 302, a ball 303 provided at one of the right and left ends on the upper surface side of the track rail 302, and the above-mentioned left and right side surfaces of the track rail 302. A ball 303 provided on the other side opposite to the ball 303 and a moving block 304 movably supported via the ball 303 are provided.

The track rail 302 is a long member formed in a substantially rectangular cross section, and is provided with a single ball rolling groove 5 as a rolling member rolling groove on the upper left side in the drawing. On the other hand, the upper half portion of the right side surface of the track rail 302 in the drawing has a tapered surface 3021 that gradually protrudes outward as it goes upward. A strip ball rolling groove 306 is provided.

The moving block 304 is a high-rigidity block having an L-shaped cross section, and has a horizontal portion 3041 facing the upper surface of the track rail 302 and a right end of the horizontal portion 3041 facing the right surface of the track rail 302. And a leg 3042 extending downward. Horizontal part 3041
A ball rolling groove 307 corresponding to the ball rolling groove 305 formed on the upper surface of the track rail 302 is provided on the lower surface of the track rail 302, and the track rail 302
Ball rolling grooves 308 are provided corresponding to the ball rolling grooves 305 formed on the left and right side surfaces of the lens.

A number of balls 303 are interposed between two sets of corresponding ball rolling grooves 305, 307; 306, 308 provided between the opposing surfaces of the moving block 304 and the track rail 302 so that a large number of balls 303 are interposed therebetween. And a ball row for applying a load acting between the moving block 304 and the moving block 304. A predetermined preload is applied to the ball 303. As the rolling element, a roller or the like can be applied in addition to the ball 303.

The contact angle line L3 connecting the contact points of the balls 303 on the upper surface of the track rail 302 with the ball rolling grooves 305 and 307 is inclined counterclockwise by a predetermined angle α1 with respect to a vertical line V passing through the center of the ball. And the ball rolling groove 30 of the ball 303 on the side surface of the track rail 302.
The contact angle line L3 connecting the contact points with 6,308
A predetermined angle α clockwise with respect to a horizontal line H passing through the center of
It is set so that it becomes an inclined line inclined by 2.

The moving block 304 has two ball return passages 3 for circulating and guiding the two rows of balls 303.
09 is provided. The ball return passage 309 is provided in each of the ball rolling grooves 305, 3 provided in the moving block 304.
It is constituted by a hole that extends linearly in parallel with 06, and is provided at the upper left corner of the horizontal portion 3041 and the lower right corner of the leg 3042.

An arc-shaped concave portion 3043 is provided at the upper left corner of the horizontal portion 3041 of the moving block 304, and a resin first pipe portion 3091 forming a ball return passage 309 is integrally joined to the concave portion 3043. ing. The first pipe portion 3091 is continuous with a side resin portion 3093 that covers the left side surface of the horizontal portion 3041 and a lower surface resin portion 3094 that covers the lower left surface of the horizontal portion 3041.

On the other hand, the leg 3042 of the moving block 304
An arcuate concave portion 3044 is provided at the lower right corner of the, and a resin second pipe portion 3092 forming a ball return passage 309 is integrally joined to the concave portion 3044.
The second pipe portion 3092 is continuous with a side resin portion 3095 covering the outer surface of the leg portion 42 and an end surface covering portion 3094 covering the lower end surface of the leg portion 3042.

At both ends of the moving block 304, a ball 303 interposed between the track rail 302 and the moving block 304 is turned into a ball return path 309.
A side lid 311 that forms a U-shaped pipe-shaped direction change path 310 is attached. Only the outer peripheral portion 310a of the U-shaped pipe-shaped turning path 310 is formed on the side cover 311 itself. At both ends of the moving block 4, a direction change path inner peripheral piece 312 as a direction change path inner peripheral forming member that forms the direction change path 310 inner peripheral portion 310 b is integrally joined, and Inner circumference piece 31 of direction change road
2 form a direction change path 310.

The moving block 304 is attached to the track rail 302 along two rows of balls.
A ball holding member 313 is provided to prevent the ball 303 from falling off when the ball 303 is removed from the housing. Ball holding member 313
Is a ball rolling groove 307 provided in the horizontal portion 341.
A pair of first and second retainers 313a and 313b extending so as to sandwich both side edges of the ball, and a pair of third and fourth retainers extending so as to sandwich both sides of the ball rolling groove 308 provided in the leg 342. It is composed of sections 313c and 313d. The first retainer portion 313a is continuous with the right lower surface covering portion 3094 and is integrated with the first pipe portion 3091. Further, the second retainer portion 313b and the third retainer portion 313c are continuous via a central lower surface covering portion 3097 covering the lower surface of the horizontal portion 341. Further, the fourth retainer part 313d is continuous with the end face covering part 3096,
It is integrated with the pipe part 3092.

The first and second pipe portions 3091 and 3092 as the above-described return passage forming members, and the first to fourth retainer portions 313a to 313a as the ball holding member 313.
13d and the turn-around-path inner circumferential piece 312 are all integrally formed with the moving block 304.

Also in this integral molding, the moving block 304 should be arranged in the mold with reference to the ball rolling grooves 307 and 308 provided in the moving block 304, and should be molded between the inner wall of the mold and the moving block 304. A cavity corresponding to the resin molding portion is formed, and the cavity is filled with a molding material and molded by insert molding.

FIG. 9 is a schematic view showing a fitting state of the moving block 304 and the mold 314 during insert molding. The mold 314 is provided with a positioning support protrusion 314b into which the ball rolling grooves 307 and 308 fit, and a pin 314 for forming a ball return passage 309.
d is provided. Horizontal part 3041 of moving block 4
A cavity 315a for molding the first pipe portion 3091 is provided in a concave portion 3043 provided in the upper left corner of the leg 342, and a second cavity is provided in the concave portion 3044 provided in the lower right corner of the leg portion 342.
Cavity 315b for forming pipe portion 3092
However, on the inner periphery of the horizontal portion 3041 and the leg portion 3042,
Cavities 315c to 15f for forming the fourth retainer portions 313a to 313d are provided. The inner peripheral piece portion of the direction changing path is the same as that of the first and second embodiments, and the description is omitted.

Also in this embodiment, the supporting projections 314b are projections having an arc-shaped cross section having substantially the same radius of curvature as the radius of curvature of the ball 303.

Therefore, the moving block 304 is supported at two points so as to sandwich the set of left and right support projections 314b on the left and right. However, since the left and right support projections 314b are vertically separated, The moving block 30 is a plane inclined in an oblique direction by an amount vertically separated from the horizontal direction.
4 makes it sandwiched.

Further, in this embodiment, the ball rolling grooves 3
07 and 308, the upper end 3041a of the concave portion 3043 at the upper left corner of the horizontal portion 3041 and the upper end 3042a of the concave portion 3044 at the lower right corner of the leg portion 3042 are fixed to the mold 31.
4 is in contact with the inner circumference. As described above, in this embodiment, the moving block 304 is supported at four points in the mold 314, and more stable positioning is performed. From the viewpoint of stable holding of the moving block 304, the ball rolling groove 30
If it is supported at one point in addition to 7,308 and is supported at a total of three points, the position is completely determined. The fulcrum position other than the ball rolling grooves 307 and 308 may be provided on the left side or upper surface of the horizontal portion 3041 and on the right side or lower surface of the leg portion 3042.

As described above, since the ball rolling grooves 307 and 308 are fitted into the support protrusions 314b, the ball rolling grooves 3
No burrs are generated on the inner circumference of 07,308.

Further, since the moving block 304 is stably positioned in the mold 314 without rattling, the first and second pipe portions 3091 and 3091 forming the ball return passage 309 are formed.
Cavities 315a, 315 for molding 3092
b, cavities 315c to 15f for molding the first to fourth retainer portions 313a to 313d, and a turning path inner circumference forming member (not shown) are accurately formed on the moving block 304.

Other functions and effects are described in the first and second sections.
The description is omitted because it is the same as the embodiment. Fourth Embodiment FIG. 10 shows a rolling guide device according to a fourth embodiment of the present invention.

The rolling guide device 401 has a U-shaped cross section which is movably supported on the track rail 2 via a track rail 402 and two rows of balls 403, one on each of the left and right side surfaces of the track rail 402. A movement block 404 of
Is provided.

The track rail 402 is a long member formed into a substantially rectangular cross section, and the upper half of the left and right side surfaces has a tapered surface 402 which gradually narrows inward as going upward.
The ball rolling grooves 405 as rolling element rolling grooves are provided on the tapered surface 4021 one by one on the left and right.

The moving block 404 is a high-rigidity block having a U-shaped cross section. The moving block 404 sandwiches the left and right sides of the track rail 402 from the left and right sides of the horizontal section 4041 facing the upper surface of the track rail 402. And a pair of legs 4042, 4042 extending downward. The ball rolling grooves 4 formed on the left and right sides of the track rail 402 are provided on the inner surfaces of the left and right legs 4042 and 4042.
The ball rolling grooves 406, 406 corresponding to 05, 405 are provided one by one.

A large number of balls 403 are interposed between the corresponding four sets of ball rolling grooves 405 and 406 provided between the opposing surfaces of the moving block 404 and the track rail 402 so that a large number of balls 403 are interposed between the track rail 402 and the moving block. A ball row for applying a load acting on 404 is configured. A predetermined preload is applied to the ball 403. As the rolling element, a roller or the like can be applied in addition to the ball 403.

Ball rolling grooves 405, 4 of each ball 403
The contact angle line L4 connecting the contact point with the reference line 06 is inclined at a predetermined angle α4 in a direction gradually decreasing toward the center of the track rail.

The moving block 404 has two ball return passages 4 for circulating and guiding the two rows of balls 403.
09 is provided. The ball return passage 409 is formed by a hole that extends linearly in parallel with each ball rolling groove 406 provided in the moving block 404, and is provided on the left and right legs 4042 one by one.

An arc-shaped concave portion 4044 is provided at the lower end corner of the outer surface of the left and right legs 4042 of the moving block 404.
A resin pipe portion 4091 forming a ball return passage 409 is integrally joined to the concave portion 4043. The pipe portion 4091 is continuous with a lower end resin portion 4092 that covers the lower end surface of the leg portion 4042. An engagement protrusion 4092a that engages with an engagement groove 4042a provided on the lower end surface of the leg portion 4042 is provided at the tip of the lower end surface resin portion 4092.

At both ends of the moving block 404, a ball 403 interposed between the track rail 402 and the moving block 404 is turned into a ball return path 409.
A side cover 411 that forms a U-shaped pipe-like direction change path 410 is attached. Only the outer peripheral portion 410a of the U-shaped pipe-shaped turning path 410 is formed on the side cover 411 itself. At both ends of the moving block 404, a directional turning path inner peripheral piece 4012 as a directional turning path inner peripheral forming member that forms the directional turning path 410 inner peripheral portion 410b is integrally joined. The direction change path 410 is constituted by the direction change path inner circumferential piece 412.

In the fourth embodiment, unlike the first to third embodiments, no ball holding member is provided.

Then, the pipe portion 4091 as the above-described return passage forming member and the inner peripheral piece portion 41 of the direction changing path are formed.
2 are all integrally formed with the moving block 404.

This integral molding is performed by using the ball rolling groove 405 provided in the moving block 404 as a reference.
4 in the mold, and the mold inner wall and the moving block 404.
A cavity corresponding to the resin molded portion to be molded is formed in between, and the cavity is filled with a molding material and molded by insert molding.

FIG. 12 is a schematic diagram showing a fitting state of the moving block 404 and the mold 414 during insert molding. The mold 414 is provided with a positioning support protrusion 414a into which the ball rolling groove 406 fits, and a pin 414b for forming the ball return passage 409 is inserted. A cavity 415 for forming the pipe portion 4091 is provided outside the concave portion 4044 at the outer corner of the leg portion 4042.
a is provided. The inner peripheral piece 412 of the direction changing path is the same as that of the first embodiment.

Also in the present embodiment, the supporting projections 414a are projections having an arc-shaped cross section having substantially the same radius of curvature as the radius of curvature of the ball 403.

Accordingly, the moving block 404 is supported at two points with the pair of left and right supporting projections 414a sandwiched therebetween. In this embodiment, unlike the third embodiment, the left and right support projections 414a are at the same height, and are sandwiched in the horizontal direction in the left and right direction by the moving block 404, and are securely fixed without rattling. On the other hand, in the vertical direction, the positioning is performed by fitting the support projection 414 a having an arc-shaped cross section with the ball rolling groove 406.

Since the ball rolling grooves 406 and 406 are fitted into the support protrusions 414a, the ball rolling grooves 40
Burrs do not occur on the inner periphery of 6,406. In the case of this embodiment, slight rattling may occur in the vertical direction depending on the fitting state of the ball rolling grooves 406 and the support protrusions 414a. Can be prevented from penetrating.

Since the moving block 404 is stably positioned in the mold 414 without rattling, a cavity 415 a for forming a pipe portion 4091 forming the ball return passage 409 is provided around the moving block 304. Formed exactly.

In this embodiment, similarly to the third embodiment, not only the ball rolling grooves 406 but also the left and right leg portions 4042 are provided.
The upper end 4042a of the concave portion 4044 at the outer corner of the mold 41
The moving block 404 is more stably supported at a total of four points. To stabilize,
If it is supported at a total of three points in addition to the ball rolling grooves 406, 406, it is reliable.
The support may be supported by the upper surface 041 or one of the left and right legs 4042.

Other functions and effects are described in the first and second sections.
The description is omitted because it is the same as the embodiment.

[0116]

As described above, according to the first and second aspects of the present invention, the moving block can be moved right and left within the mold.
The support protrusions of the set surely support without rattling at four points.

Further, according to the third aspect of the present invention, the moving block having the L-shaped cross section is surely prevented from rattling by a set of left and right supporting projections vertically separated in the mold in the horizontal direction. Supported.

Furthermore, according to the fourth aspect of the present invention,
The moving block is securely supported by a pair of left and right supporting projections without play.

As described above, according to the first to fourth aspects of the present invention, in the mold, the moving block is securely supported by the supporting projections fitted into the ball rolling grooves, so that the filling pressure of the molding material is reduced. Act on the moving block, the moving block is stably held at the predetermined position. Therefore, the ball return path forming member, the ball holding member, or the ball direction changing path inner circumferential forming member can be accurately formed on the moving block, and the space between the direction changing path and the ball rolling groove, the direction changing path and the ball return path can be formed. There is no step between the rolling elements, the rolling elements are smoothly circulated, and noise is reduced.

Further, since the supporting projection is formed in an arc shape and fitted into the ball rolling groove, it is possible to prevent burrs in the ball rolling groove.

In order to prevent burrs, if a gap between the ball rolling groove of the moving block and the supporting convex portion of the mold is formed to an extent that the molding material can be prevented from infiltrating, an allowable range is set. The mold can be easily manufactured.

If the moving block to be subjected to insert molding is ground with reference to the rolling groove of the rolling element, the gap between the outer periphery of the moving block inserted into the mold and the contact surface between the mold is minimized. Can be set small, and the occurrence of burrs on the outer peripheral side can also be prevented.

[Brief description of the drawings]

FIGS. 1A and 1B show a rolling guide device according to a first embodiment of the present invention. FIG. 1A is a cross-sectional view orthogonal to a track rail, and FIG. FIG. 3C is a diagram showing the configuration, and FIG. 3C is a diagram showing a side cover.

FIGS. 2A and 2B show a rolling guide device according to a first embodiment of the present invention. FIG. 2A is a partially cutaway side view of a moving block end face, and FIG. FIG.

FIG. 3 is a diagram illustrating a moving block forming method.

FIGS. 4A and 4B show a rolling guide device according to a second embodiment of the present invention. FIG. 4A is a cross-sectional view orthogonal to a track rail, and FIG. FIG.
FIG. 3 is a view showing a side cover.

5A and 5B show a rolling guide device according to a second embodiment of the present invention. FIG. 5A is a partially cutaway side view of an end face of a moving block, and FIG. FIG.

FIG. 6 is a diagram showing a moving block forming method.

FIGS. 7A and 7B show a rolling guide device according to a third embodiment of the present invention. FIG. 7A is a cross-sectional view orthogonal to a track rail, and FIG. FIG. 3C is a diagram showing the configuration, and FIG. 3C is a diagram showing a side cover.

FIGS. 8A and 8B show a rolling guide device according to a third embodiment of the present invention. FIG. 8A is a partially cutaway side view of an end surface of a moving block, and FIG. FIG.

FIG. 9 is a diagram showing a moving block forming method.

FIG. 10 shows a rolling guide device according to a fourth embodiment of the present invention. FIG. 10 (a) is a cross-sectional view orthogonal to a track rail, and FIG. FIG. 3C is a diagram showing the configuration, and FIG. 3C is a diagram showing a side cover.

FIG. 11 shows a rolling guide device according to a fourth embodiment of the present invention. FIG. 11 (a) is a partially cutaway side view of a moving block end face, and FIG. 11 (b) is a partially cutaway side view. FIG.

FIG. 12 is a diagram showing a moving block forming method.

FIG. 13 is a diagram showing a modification of the second embodiment.

FIG. 14 is a view showing a conventional linear motion bearing.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Rolling guide device 2 Track rail 3 Ball 4 Moving block 5, 6 Ball rolling groove (track rail side) 7, 8 Ball rolling groove (moving block side) 9 Ball return passage 91, 92 First and second pipe section (Return passage forming member) 10 Turnaround path 10a Outer circumference of turnaround path 10b Inner circumference of turnaround path 11 Side cover 12 Inner circumference turnpiece (turnover path inner circumference forming member) 13 Ball holding members 13a to 13c First to third retainer parts 14 Mold

Claims (6)

(57) [Claims] 1. A U-shaped cross section movably supported by a track rail via a track rail, and two rows on the upper surface side of the track rail and one row on each of the left and right side faces, a total of four ball rows. A block, four ball rolling grooves formed correspondingly to each other and provided between the track rail and the opposing surface of the moving block to guide the four rows of balls; Four rows of ball return passages provided corresponding to the rows of ball rows, and a direction change that is provided at both ends of the moving block and turns a ball row interposed between the track rail and the moving block into a ball return path. A side cover having a path; a ball holding member provided along four rows of balls of the moving block to prevent balls from falling off; a return path forming member forming the ball return path; Department And a rolling guide device for integrally molding at least one of the turning path inner peripheral portion forming members forming the turning path inner peripheral portion with the moving block by insert molding in which the moving block is disposed in a mold. A method of forming a moving block, comprising, in the insert molding, supporting protrusions having an arc-shaped cross section having substantially the same radius of curvature as the ball corresponding to a ball rolling groove of the moving block on the inner periphery of the mold. A method for forming a moving block of a rolling guide device, wherein the moving block is positioned in a mold by providing a ball rolling groove in the supporting protrusion. 2. A track rail, a movable block having a U-shaped cross section movably supported on the track rail via a total of four ball rows on each of the left and right side surfaces of the track rail via two vertical rows, and the four rows. Four ball rolling grooves formed corresponding to each other and formed between the track rail and the opposing surface of the moving block to guide the row of balls, the moving block corresponding to the four rows of balls Side cover provided with four rows of ball return passages provided at both ends of the moving block, and a direction changing path for turning a row of balls interposed between the track rail and the moving block into a ball return path. And a ball holding member provided along the four ball rows of the moving block to prevent the ball rows from falling off, and a return path forming member, a ball holding member, and a ball return path forming the ball return path. A moving block of a rolling guide device in which at least one of the turning path inner peripheral portion forming members forming the turning path inner peripheral portion is integrally formed with the moving block by insert molding in which the moving block is disposed in a mold. In the insert molding, at the inner periphery of the mold, supporting protrusions having an arc-shaped cross section having substantially the same radius of curvature as the ball corresponding to the ball rolling groove of the moving block are provided at four places. And forming a moving block in the mold by fitting a ball rolling groove into the supporting projection. 3. A track rail, a row of balls provided on one of the left and right shoulders on the upper surface of the track rail, and the ball row among the left and right side surfaces of the track rail. A row of balls provided on an opposite side surface, a moving block having an L-shaped cross section movably supported via the same, and a track rail and a moving block facing each other to guide the two rows of balls. Two rows of ball rolling grooves formed between the surfaces provided corresponding to each other; two rows of ball return passages provided in the moving block corresponding to the two rows of balls; Side covers provided at both ends of the moving block, and provided with a turning path for turning a row of balls interposed between the track rail and the moving block to a ball return path; and provided along four rows of balls of the moving block. Ball drop off At least one of a return path forming member that forms the ball return path, a ball holding member, and a direction change path inner peripheral portion forming member that forms the direction change path inner peripheral portion. A method of forming a moving block of a rolling guide device, wherein the moving block is integrally formed with the moving block by insert molding in which the moving block is disposed in a mold, wherein, in the insert molding, the ball of the moving block is rolled around the inner periphery of the mold. The support block having an arc-shaped cross section having substantially the same radius of curvature as the ball is provided at two locations corresponding to the drive groove, and the ball is inserted into the support protrusion to move the moving block into the mold. A method for forming a moving block of a rolling guide device, characterized in that: 4. A track rail, a moving block having a U-shaped cross section movably supported by the track rail via a total of two ball rows, one row on each of the left and right side surfaces of the track rail, Two ball rolling grooves formed correspondingly to each other and provided between the track rail and the opposing surface of the moving block to guide the ball row; and the moving block corresponds to the two rows of ball rows. A side cover provided with two rows of ball return passages provided at both ends of the moving block, and a direction change path for turning a row of balls interposed between the track rail and the moving block into a ball return path. The moving block is placed in a mold, and at least one of the return path forming member forming the ball return path and the direction changing path inner peripheral portion forming member forming the direction changing path inner peripheral portion is provided. Deploy A method of forming a moving block of a rolling guide device integrally formed with a moving block by insert molding, wherein the insert molding is substantially the same as the ball corresponding to a ball rolling groove of the moving block on the inner periphery of the mold. A rolling guide device characterized in that a support projection having a circular-arc cross section having a radius of curvature is provided at two places, and a moving block is positioned in a mold by fitting a ball rolling groove into the support projection. Moving block molding method. 5. The outer periphery of the moving block is ground and finished on the basis of the ball rolling grooves of the moving block, and thereafter, the moving block is arranged in the mold with the ball rolling grooves as a reference to perform insert molding. The method of forming a moving block of a rolling guide device according to claim 1, 2, 3, or 4. 6. The contact state between the ball rolling groove of the moving block and the supporting projection of the mold is such that a gap that can prevent the intrusion of the molding material is within an allowable range. 4
Moving block forming method of the rolling guide device according to the above.