JP2002039174A - Rolling guide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rolling guide device having a resin molding part formed integrally with a block body, and being easier to fabricate and assemble by eliminating the trouble of assembling seal parts. SOLUTION: A moving block 4 includes the block body 40 and the resin molding part 11 injection molded or separately molded and integrated with the block body 40. In the rolling guide device comprising a rolling element return passage 8 provided along movement direction in the block body 40 and/or the resin molding part 11, and a pair of side lids forming an endless circulation path by communicating a load rolling path 7 with the rolling element return passage 8, the resin molding part 11 constitutes guide parts 111, 113, 114a and 114b for guiding a rolling element at least along a load rolling surface 6, and seal parts 112a, 112b, 115a and 115b for engaging a guide rail are provided integrally with the guide parts 111, 113, 114a and 114b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling guide device comprising a guide rail and a movable block relatively movable with respect to the guide rail via a rolling element such as a ball or a roller. For preventing the intrusion into the moving block.

[0002]

2. Description of the Related Art Conventionally, as a rolling guide device of this type, a guide rail provided on a fixed portion such as a bed and having a rolling element rolling surface formed thereon, and a rolling element rolling surface of the guide rail are provided. A load rolling surface that cooperates to form a load rolling path is provided, is mounted on this guide rail via a number of rolling elements, and moves along the guide rail while supporting a movable body such as a table. What consists of blocks is known.

[0003] The moving block has a load rolling surface facing the rolling surface of the guide rail via a rolling element and a rolling element return path parallel to the load rolling surface. And a pair of side lids, each of which is fixed to both ends of the block main body in the moving direction and has a direction change path of the rolling element that connects and connects the load rolling surface and the rolling element return path. By fixing the side lids to both ends in the moving direction of the block body, the load rolling surface and the end of the rolling element return passage are connected by a direction change path, and the endless circulation path of the rolling element is located in the moving block. Is to be completed.

Further, the block body is provided with a lubricating oil filled in the moving block so that foreign matter adhering to the upper surface of the guide rail or foreign matter trying to enter from below the moving block does not enter the rolling element rolling surface. In order to prevent leakage of the agent, seal portions are attached to both ends of the moving block in the moving direction and the moving direction by engaging with the guide rail.

Further, the present applicant has complicated the work of drilling a rolling element return passage for the moving block and attaching a rolling element holder for holding a rolling element between the moving block and the rolling surface of the block body. In order to solve the problem, it has been proposed to manufacture a synthetic resin integrally with a moving block using injection molding or a separate resin molded body (Japanese Patent Application Laid-Open Nos. 7-317762 and 11-72119).

[0006]

However, even when the moving block is manufactured, the seal must still be attached, and the assembling work is time-consuming.

In order to solve this problem, Japanese Patent Laid-Open No.
Japanese Patent Publication No. 281168 discloses a method of integrally manufacturing a side lid and a seal of an end face of a moving block. However, this method only reduces the time and effort required for an easily installable seal part of an end face seal. For this reason, a seal portion extending in the moving direction of the block body must be separately attached, and a method for eliminating the complexity of assembling the seal portion has been desired.

An object of the present invention is to provide a rolling guide device in which a resin molded portion is integrally formed with a block main body, by eliminating the complexity of assembling a seal portion, thereby making the rolling guide device easier to manufacture and assemble. Make it an issue.

[0009]

Means for Solving the Problems In order to solve the above problems, the rolling guide device according to the present invention employs the following means. That is, the rolling guide device according to claim 1 of the present invention includes a guide rail provided with a rolling element rolling surface along a longitudinal direction, and a number of rolling elements rolling along the rolling element rolling surface. And a load rolling surface that forms a load rolling path of the rolling element in cooperation with the rolling element rolling surface of the guide rail, and is movably attached to the guide rail via the rolling element. A moving block, wherein the moving block is a resin molded part integrated with the block main body as a block main body and a resin molded body formed by injection molding or separate molding of the block main body. And a rolling element return passage provided in the block main body and / or the resin molded portion in a moving direction, and mounted on both ends of the block main body in the moving direction, and communicating the load rolling path and the rolling element return path. Infinite circulation In a rolling guide device configured with a pair of side lids forming a path, the resin molded portion constitutes at least a guide portion for guiding a rolling element along the load rolling surface, and the guide portion includes And a seal portion engaged with the guide rail is provided integrally.

According to this structure, when molding the resin molded portion, after the guide portion for guiding the rolling element is injection-molded, the seal portion engaged with the guide rail is provided integrally with the guide portion by injection molding or the like. This eliminates the complexity of assembling the seal part,
The time required for assembly can be reduced.

The synthetic resin member used for the guide portion is made of a hard synthetic resin having relatively excellent rigidity and heat resistance, for example, polyamide such as polyolefin, ABS, nylon 66, polybutylene terephthalate (PBT), polyacetal (POM), Modified polyphenylene oxide (modified PP
O), thermoplastic resins such as polyphenylene sulfide (PPS) and polyetheretherketone (PEEK);
In order to improve the strength and abrasion resistance as needed, a thermoplastic resin composition in which fillers such as glass fiber, rock wool fiber, carbon fiber, potassium titanate whisker, etc. are blended in a predetermined ratio is suitable. The synthetic resin member used for the seal portion uses a thermoplastic resin. Among them, synthetic rubbers such as urethane rubber, nitrile rubber, and fluoro rubber having moderate elasticity, polyamide-based, polyester-based, polyurethane-based, and styrene-based are used. And olefin-based synthetic resin elastomers.

Further, the rolling guide device according to a second aspect of the present invention is configured such that the seal portion is formed so as to extend in the moving direction of the guide portion. According to this configuration, the moving block can be reliably sealed in the longitudinal direction.

Further, a rolling guide device according to a third aspect of the present invention is configured such that the seal portion is prevented from falling off by a locking portion provided on the guide portion. According to this configuration, the seal portion is locked by the locking portion of the guide portion and securely adheres, and the seal portion is not easily detached from the guide portion.

Further, in the rolling guide device according to a fourth aspect of the present invention, the seal portion is formed by using a thermoplastic elastomer.

According to this configuration, the sealing effect can be further improved by using a thermoplastic elastomer having an appropriate elasticity for the seal portion. The thermoplastic elastomer exhibits the properties of vulcanized rubber at room temperature, but is a polymer material that is plasticized at a high temperature and can be molded by a plastic processing machine, and is suitable for vulcanization molding and injection molding. Further, a moving mold having the same shape as the seal portion is added to the core (insert part) of the first step of forming the guide portion for guiding the rolling element, and the guide portion is formed and the synthetic resin member of the guide portion is formed. After the resin is cured, the movable mold is pulled out to form a cavity, and a thermoplastic elastomer for a seal portion is injected into the cavity, so that the seal portion and the guide portion can be continuously and integrally molded.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A rolling guide device according to an embodiment of the present invention will be described below in detail with reference to FIGS. [Structure of Rolling Guide Apparatus] A rolling guide apparatus 1 according to an embodiment of the present invention includes a guide rail 2 as shown in FIG.
And a moving block 4 that freely moves on the guide rail 2. The moving block 4 is mounted via a number of spherical rolling elements 3.

The guide rail 2 is a member having a substantially rectangular cross section on a surface orthogonal to the longitudinal direction, and rolling element rolling surfaces 5... Have been. Although FIG. 1 shows the guide rail 2 formed in a straight line, the shape is not limited to this, and may be a curved line. Also,
The rolling element rolling surfaces 5 are not limited to the illustrated form,
It does not matter even if they are provided one by one or three as left and right.

On the other hand, the moving block 4 has a substantially gate-shaped cross section on a plane perpendicular to the moving direction. Moving block 4
Is mounted on the guide rail 2 via a number of rolling elements 3... So as to straddle the guide rail 2. The moving block 4 includes a block body 40 and side covers 41, 41 made of a metal material attached to both ends in the moving direction.
And resin end seals 42, 42 attached to both ends by screws 43. The resin molded portion 11 is attached to the block body 40 by injection molding described later.

In the moving block 4, as shown in FIG.
A substantially semi-circular load rolling surface 6 ... 6 facing the rolling element rolling surfaces 5 ... 5 provided on the guide rail 2 is provided with the rolling element rolling surfaces 5 ...
Like the case of No. 5, two lines are provided on each side. These rolling element rolling surfaces 5 and 5 and load rolling surfaces 6 and 6 form load rolling paths 7 and 7 that are part of a circulation path in which the rolling elements 3 and 3 circulate. The block body 40 is provided with four rolling element return passages 8 having a circular cross section in order to escape the rolling elements 3 in the load area corresponding to the load rolling paths 7. I have. As shown in the vertical cross-sectional view of the moving block in FIG. 3, the side covers 41 are connected to the load rolling paths 7 and the rolling element return paths 8 from one end to the other end in the moving direction. 9 are formed. these,
An infinite circulation path 10 is formed by the load rolling path 7, the rolling element return path 8, and the direction change path 9.

The rolling elements 3, 3 have spacers 31, 31 disposed between the rolling elements 3, 3 and the spacers 31, 31.
Are connected in a rosary form by connecting portions 32 that rotatably hold the rolling members 3... From both side surfaces of the rolling members 3. The rolling elements 3... 3 move along the load rolling path 7 with the movement of the moving block 4, are guided to one end side of the rolling element return path 8 via the direction change path 9, and pass through the rolling element return path 8 to the other. It moves to the end side, passes through the direction change path 9 on the other end side, is again guided to the load rolling path 7, and circulates through the infinite circulation path 10.

Next, the resin molded portion 11 attached to the block body 40 will be described with reference to FIGS. The resin molded part 11 has guide parts 111, 113, 114a, 114
b, 116a to 116d, and seal portions 112a, 112
b, 115a and 115b. The resin molding portion 11 extends in the moving direction of the moving block 4 (the direction penetrating the plane of FIG. 2) (see the perspective view of FIG. 4). In particular, the seal portions 112a, 112b, 115a, 115b
Extends beyond the end of the block body 40 to a position overlapping the gate-shaped inner peripheral surface of the side lid 41.

The guide portion 111 is disposed on a surface 49 facing the upper surface 21 of the guide rail 2, and the guide portion 113 is disposed on the surface 47, and the rolling elements 3 rolling on the load rolling paths 7,.
3 and the connecting portion 32 of the connecting body 30 are held so as not to fall off. Further, the guide portions 114a and 114b are arranged on the surface 48, and hold the rolling elements 3,... 3 and the connecting portion 32 of the connecting body 30 from falling off from below the load rolling paths 7, 7. Furthermore, the guides 116a to 116d are provided with the rolling elements 3 ...
The rolling element return passages 8, 8 that can guide the 3 and the coupling body 30 are formed.

The guides 111, 113, 1
14a, 114b, 116a to 116d are attached to the block main body 40 by injection molding (insert molding) using the gate-shaped block main body 40 as an insert part.

The guides 111, 113, 114a,
The synthetic resin members used for 114b and 116a to 116d are hard synthetic resins having relatively excellent rigidity and heat resistance, for example, polyamide such as polyolefin, ABS, nylon 66, polybutylene terephthalate (PBT), polyacetal (POM), and modified polyphenylene. Thermoplastic resins such as oxide (modified PPO), polyphenylene sulfide (PPS), and polyetheretherketone (PEEK) may be used, for example, glass fiber, rock wool fiber, carbon fiber, titanium, in order to improve strength and wear resistance as necessary. A thermoplastic resin composition in which a filler such as potassium acid whisker is blended in a predetermined ratio is suitable.

On the other hand, seal portions (inner seals) 112a and 112b provided on both side edges of the guide portion 111 are formed of a synthetic resin member made of a different material from that of the guide portion 111, and have a V-shaped vertical cross section at the tip. The lip is divided into two forks. Then, the forked lip portion is made to follow the upper surface 21 of the guide rail 2 so that the load rolling path 7,
The load rolling paths 7 and 7 are sealed from the upper side of 7. In addition, the length of the both ends of the lip portion, which is farther from the side closer to the load rolling paths 7, 7, is formed to be longer, and the load rolling paths 7, 7 are formed.
The sealing state of 7 is ensured.

Further, seal portions (side seals) 115a, 115 provided at the ends of the guide portions 114a, 114b.
b is also formed of a synthetic resin member of a different material from the guide portions 114a and 114b, and is formed so that the cross-sectional shape becomes L-shaped. One end of the L-shape is engaged with the side surface 22 of the guide rail 2 to seal the load rolling paths 7, 7 from below the load rolling paths 7, 7.

As described above, in the rolling guide device 1, the tip portions of the seal portions 112a, 112b, 115a, and 115b are attached by being engaged with the upper surface 21 and the side surface 48 of the guide rail 2, and the upper surface 21 and the side surface of the guide rail 2 are mounted. The gap between the moving block 4 and the moving block 4 is sealed without leakage, thereby preventing foreign matter from entering the load rolling path 7 from the outside.

The rolling elements 3... 3
In order to ensure that the connecting portion 32 rolls smoothly in the endless circulation path 10, a lubricant such as grease is filled. Then, the seal portions 112a, 112b, 115a,
Reference numeral 115b prevents external leakage of the lubricant by engaging with the upper surface 21 and the side surface 48 of the guide rail 2.

Then, these seal portions 112a, 112
b, 115a, 115b are guide parts 111, 114a, 1
The guide portions 111 and 114 are formed by injection molding (insert molding) using 14b as a core (insert part).
a, and is closely fixed to the engaging portion of the 114b (e.g., engaging holes) H ₁ ~H _4.

As shown in FIGS. 8 and 9, the locking portions H _{1 to} H ₄ are provided with seal portions 112a, 112b, 115a and 115.
Guide portions 111, 114a, 114 to which b is integrally locked
It is formed in advance at the position on the b side. That is, the locking portion H
₃ (H ₄ ), as shown in FIG.
4b, the sealing portion 115a (115
The guide portions 114a and 114b are formed in advance so that the side surface shape becomes substantially semicircular at a position where the b) is integrally locked. As shown in FIG. 9, the locking portion H ₁ (H ₂ ) is used to seal the guide portion 111 when the guide portion 111 is injection-molded.
(112b) is formed in the guide portion 111 in advance so that the side surface shape becomes an inverted trapezoidal shape at a position where the (112b) is integrally locked. The seal portion 112a of the engaging portion H ₁ to H ₄ by a semicircular shape or inverted trapezoidal shape, 112b, 115a,
It is possible to further improve the effect of preventing 115b from detaching from the guides 111, 114a, 114b (that is, the moving block 4).

The seal portions 112a, 112b, 11
As the synthetic resin member used for 5a and 115b, a thermoplastic resin is used, and among them, a thermoplastic elastomer having appropriate elasticity is preferably used. Thermoplastic elastomer is a polymer material which exhibits the properties of vulcanized rubber at normal temperature, but is plasticized at high temperature and can be molded by a plastic processing machine.

Examples of the synthetic rubber or synthetic resin elastomer used for this purpose include synthetic rubber such as urethane rubber, nitrile rubber, and fluoro rubber, and synthetic resin such as polyamide, polyester, polyurethane, styrene, and olefin. Elastomers can be given.

The moving block 4 of the rolling guide device according to the above embodiment is manufactured by integrally molding the metal block main body 40 and the resin molded portion 11 by the following injection molding. It is assumed that the metal block main body 40 has machined through holes for the load rolling surfaces 6... 6 and the rolling element return passages 8.

[Injection Molding of Moving Block (Insert Molding)] In the injection molding, so-called insert molding in which the machined block main body 40 is placed in a mold as a core (insert part) to mold the resin molded portion 11 is performed. Done by In this insert molding, the guide portions 111, 113, 114a, 114b, 116a to 1
A first step of injection molding 16d, and a second step of injection molding the seal portions 112a, 112b, 115a, 115b with the guide portions 111, 114a, 114b hardened in the first step as cores, The first step and the second step are performed continuously.

FIG. 10 is a sectional view showing the block body 40 inserted into the dies 51 and 52. A support portion 53 for fixing the block body 40 is provided upright on the mold 51.
By fitting from the axial direction (perpendicular to the paper),
The positioning of the block main body 40 in the molds 51 and 52 is performed, and cavities K _{1 to} K ₄ corresponding to the ball holding portions of the moving block 4 are formed between the block main body 40 and the support portion 53.

That is, the mold 52 is a member having a rectangular cross section disposed at the position of a blank portion on the gate-shaped side of the mold 51 and having the same length as the longitudinal dimension of the block body 40. . The mold 52 has stepped reference surfaces 52a and 52b. The reference surface 52a is for positioning the block body 40 (the lower surface of the block body 40 in FIG. 10), and the reference surface 52b is a support portion 53 (see FIG. In 10, the lower surface of the support portion 53 is positioned.

The support portion 53 is a member having a substantially rectangular cross section, which is disposed at the position of the blank portion on the side of the gate shape of the block body 40, and has a length equal to the longitudinal dimension of the block body 40. Have. One side of this rectangle is positioned on the stepped reference surface 52b of the mold 52. The support portion 53 has four protrusions 53a to 53d having a substantially circular cross section on the side wall surface. The four protrusions 53a to 53d are formed on a part of the load rolling surfaces 6. It is formed so as to be engageable. The support portion 53 is positioned on the stepped reference surface 52b of the mold 52, and the protrusions 53a to 53d of the support portion 53 are formed.
Engages with the load rolling surfaces 6... 6 of the block body 40, whereby the block body 40 is fixed in the mold 50.

Further, rod-shaped dies 51a to 51d having a cross-sectional shape which matches the shape of the rolling element return passages 8 are inserted into the through holes of the block body 40, and the guide portions 116a to 51d are inserted.
Cavity K ₅ ~K ₈ corresponding to 116d are formed.

Further, the supporting portion 53 has a projection 5 on its side wall surface.
It has two concave portions 53e and 53f adjacent to 3a to 53d. These two concave portions 53e and 53f are formed in shapes that allow a part of each of the bar-shaped molds 54a and 54b to be inserted.

The molds 54a and 54b are provided with seal portions 115a,
It has an L-shaped cross section that matches the shape of 115b.
The molds 54a and 54b are inserted into the recesses 53e and 53f of the support portion 53 in the same manner as the ends of the seal portions 115a and 115b that are brought into contact with the side surface 22 of the guide rail 2, so that the molds 54a and 54b Positioned. The molds 54a and 54b are formed so as to be able to be pulled out from the concave portions 53e and 53f of the support portion 53. Molds 54a, 54b
Is pulled out after the first step, and a cavity is formed after the drawing. Note that a part of the extracted cavity forms semicircular locking portions H ₃ and H ₄ (see FIG. 8).

Then, as a first step of the injection molding, the formed cavities K _{1 to} K ₈ are filled with a molten synthetic resin member (for example, ABS resin) from a nozzle (not shown) of an injection molding machine. Then, the guide portion 111,113,114a synthetic resin member filled in the cavity K ₁ ~K _4,
114b are formed, the rolling element return passage 8 ... 8 are formed of a synthetic resin member filled in the cavity K ₅ ~K _8.

Then, the synthetic resin member is cooled to a temperature close to the temperature of the mold 50, and after the hardening of the synthetic resin member, the bar-shaped molds 54a and 54b are pulled out from the concave portions 53e and 53f of the support portion 53, and the injection molding is performed. As two steps, a cavity corresponding to the seal portions (side seals) 115a and 115b is filled with a molten synthetic resin member (for example, urethane rubber) from a nozzle (not shown) of an injection molding machine. Incidentally, the mold 54a, the engaging portion of the semicircular portion of the cavity formed after not pull the 54b H _3, H _4, and the seal portion 115a, 115b the guide portion 114a, 114b (i.e., the moving block 4 ) Is further improved.

Then, the synthetic resin member is cooled to near the temperature of the mold 50, the mold 52 and the support portion 53 are opened after the hardening of the synthetic resin member, and the molded moving block body 40 is moved to the mold 51. And the injection molding of this embodiment is completed.

In the above embodiment, the mold 50 has the block body 40 as the core. However, as another embodiment, the block body 40 with the side lid 41 assembled therein is the core. It may be configured as follows. According to this alternative embodiment, the seal portions 112a, 112b, 115
a, 115b can be easily extended to the end seals 42, 42, and the seal portions 112a, 112b, 11
5a and 115b act so as to close the gap between the moving block main body 40, the side lid 41 and the end seals 42, 42, and the sealing effect is further improved.

In the above embodiment, the guide portion and the seal portion are formed by injection molding. However, the present invention is not limited to injection molding, and other molding methods such as compression molding can be used.

Although the rolling guide device 1 having the infinite circulation path 10 has been described above, the present invention includes a rolling guide device having a finite circulation path. In addition, the spherical rolling element 3
… Has described the rolling guide device 1 on which 3 rolls,
The present invention also includes a rolling guide device in which rolling elements of the rollers roll.

[0047]

As described above, the present invention has the following configuration and operation, and therefore has the following effects.

According to the first aspect of the present invention, when molding the resin molded portion, after the guide portion for guiding the rolling element is injection-molded, the seal portion engaged with the guide rail is formed by injection molding or the like. Can be provided integrally with each other, so that the time required for manufacturing and assembling can be greatly reduced. In addition, since there is no need to provide a separate fixing means when attaching the seal portion, it is possible to reduce the cost.

According to the second aspect of the present invention, since the sealing portion is formed so as to extend in the moving direction of the guide portion, the sealing of the moving block in the longitudinal direction can be reliably performed. it can.

Further, according to the third aspect of the present invention, since the seal portion is configured to be prevented from coming off by the locking portion provided on the guide portion, the seal portion is formed by the locking portion of the guide portion. It is locked and securely adhered, and the seal portion does not peel off from the guide portion.

According to the fourth aspect of the present invention, the sealing effect can be further improved by using a thermoplastic elastomer having an appropriate elasticity for the seal portion. The thermoplastic elastomer exhibits the properties of a vulcanized rubber at room temperature, but is a polymer material that is plasticized at a high temperature and can be molded by a plastic processing machine, and is suitable for injection molding and the like. Further, a moving mold having the same shape as the seal portion is added to the core (insert part) of the first step of forming the guide portion for guiding the rolling element, and the guide portion is formed and the synthetic resin member of the guide portion is formed. After the resin is cured, the movable mold is pulled out to form a cavity, and a thermoplastic elastomer for a seal portion is injected into the cavity, so that the seal portion and the guide portion can be continuously and integrally molded. Therefore, if the guide portion and the seal portion are continuously and integrally formed, the guide portion and the seal portion are firmly fused and are not separated.

[Brief description of the drawings]

FIG. 1 is a perspective view of a rolling guide device according to an embodiment of the present invention.

FIG. 2 is a front sectional view of the rolling guide device according to the embodiment of the present invention.

FIG. 3 is a longitudinal sectional view of the rolling guide device according to the embodiment of the present invention, showing an infinite circulation path.

FIG. 4 is a perspective view of a moving block main body.

FIG. 5 is a front view of a moving block main body.

FIG. 6 is an enlarged view of a portion A in FIG. 5;

FIG. 7 is an enlarged view of a portion B in FIG. 5;

FIG. 8 is an enlarged view of a locking portion provided on a resin portion.

FIG. 9 is an enlarged view of a locking portion provided on a resin portion.

FIG. 10 is a plan view of a mold.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Rolling guide device 2 ... Guide rail 3 ... Rolling element 4 ... Moving block 5 ... Rolling element rolling surface 6 ... Load rolling surface 7 ... Load rolling path 8 ... Rolling element return path 10 ... Infinite circulation path 11 ... Resin molding Part 40 Block main body 41 Side lid 42 End seal 111, 113, 114a, 114b, 116a to 11
6d ... guide portion 112a, 112b, 115a, 115b ... the seal portion H ₁ ~H ₄ ... locking portion

Claims (4)

[Claims] 1. A guide rail provided with a rolling element rolling surface along a longitudinal direction, a number of rolling elements rolling along the rolling element rolling surface, and the rolling element rolling of the guide rail A load rolling surface provided in cooperation with a surface to form a load rolling path of the rolling element, and a moving block movably attached to the guide rail via the rolling element. Comprises a block main body and a resin molded part integrated with the block main body as a resin molded body formed by injection molding or separate molding of the block main body, and the block main body and / or A rolling element return passage provided in the resin molded portion in the moving direction, and a pair of side covers attached to both ends of the block body in the moving direction and communicating the load rolling path and the rolling element return path to form an infinite circulation path; Composed of In the rolling guide device, the resin molded portion constitutes a guide portion that guides a rolling element at least along the load rolling surface, and the guide portion is integrally provided with a seal portion that engages with the guide rail. A rolling guide device characterized by being provided. 2. The rolling guide device according to claim 1, wherein the seal portion is formed so as to extend in a moving direction of the guide portion. 3. The rolling guide device according to claim 1, wherein the seal portion is prevented from coming off by a locking portion provided on the guide portion. 4. The rolling guide device according to claim 1, wherein the seal portion is formed using a thermoplastic elastomer.