JP2003013952A - Linear guide unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a linear guide unit capable of impregnating a sufficient amount of liquid lubricant into a porous resin sintered body after bonding the porous resin sintered body to a plate-shaped member (reinforced plate). SOLUTION: When the resin sintered body 16 is bonded on the reinforced plate 15, a bonding agent having kinematic viscosity from 100 cSt to 1000 cSt at 40 deg.C is used, and the bonding agent is prevented from impregnating into the inside of the sintered body 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear motion guide device used as means for guiding a work table of a precision machine tool in the moving direction of the table.

[0002]

2. Description of the Related Art Conventionally, a linear motion guide device of this type is formed on a guide rail having a substantially rectangular cross section and both side surfaces of the guide rail, as disclosed in Japanese Patent Application Laid-Open No. 7-35146. A slider that engages in the rolling groove of each rolling element through a large number of spherical rolling elements so as to be relatively movable in the longitudinal direction of the guide rail, a reinforcing plate attached to the slide-side end surface of the slider, and the reinforcing plate. A seal member bonded with an adhesive is provided, and the U-shaped gap formed between the guide rail and the slider is configured to be sealed by the seal member.

In such a linear motion guide device, when the rolling element rolls in the rolling element rolling groove of the guide rail, the film thickness of the oil film formed on the surface of the rolling element rolling groove becomes thin or the oil film runs out. It happens. Therefore, in order to solve such a problem, conventionally, the seal member is formed of a porous resin sintered body to impregnate the seal member with a liquid lubricant such as mineral oil and form a lip on the seal member. The lip is brought into sliding contact with the rolling element rolling groove of the guide rail to apply the liquid lubricant impregnated in the seal member to the rolling element rolling groove of the guide rail.

[0004]

However, in the linear motion guide device described above, when the seal member is adhered to the reinforcing plate with an adhesive, if an adhesive having a low viscosity is used, the adhesive penetrates into the inside of the seal member. Therefore, there is a problem in that the seal member cannot be impregnated with a sufficient amount of the liquid lubricant. On the contrary, if an adhesive having a high viscosity is used, the adhesive is less likely to come out of the syringe, so that there is a problem that the workability in adhering the seal member to the reinforcing plate is deteriorated. In order to secure the impregnated amount of the liquid lubricant, if the seal member is impregnated with the liquid lubricant and then the seal member is bonded to the reinforcing plate, the liquid lubricant impregnated into the seal member is used for adhesion. There was a problem that it was difficult.

The present invention has been made by paying attention to such a problem, and an object thereof is to obtain a sufficient amount even after the porous resin sintered body is adhered to the plate member (reinforcing plate). Another object of the present invention is to provide a linear motion guide device with a lubricant-containing member, which can be impregnated with the liquid lubricant and can easily adhere the resin sintered body to the plate member.

[0006]

In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention is a guide rail having a rolling element rolling groove on the outer surface, and the rolling element rolling of this guide rail. A slider that engages in the moving groove via a number of rolling elements so as to be relatively movable in the longitudinal direction of the guide rail, a plate-shaped member attached to the slide-side end surface of the slider, and lubrication bonded to the plate-shaped member. In a linear motion guide device provided with an oil-containing member, the lubricating oil-containing member is formed of a porous resin sintered body, and when the resin sintered body is adhered to the plate-shaped member, the viscosity of the adhesive is reduced. It is characterized in that the resin sintered body is impregnated with the liquid lubricant after the adhesive is adhered to the inside of the seal member with an adhesive having a viscosity that does not easily penetrate.

With such a construction, the adhesive applied to the resin sintered body or the plate-shaped member does not penetrate into the resin sintered body. Therefore, a sufficient amount of liquid lubricant can be impregnated even after the porous resin sintered body is bonded to the plate member. According to a second aspect of the present invention, a guide rail having a rolling element rolling groove on an outer surface thereof and a plurality of rolling elements are provided in the guide rail relative to the longitudinal direction of the guide rail. A linear motion guide device comprising a slider movably engaged, a plate-shaped member attached to a slide-side end surface of the slider, and a lubricating oil-containing member adhered to the plate-shaped member Is formed of a porous resin sintered body, the resin sintered body is adhered to the plate-like member with an adhesive tape, and then the resin sintered body is impregnated with a liquid lubricant.

With such a structure, since the liquid adhesive does not have to be used as a means for adhering the resin sintered body to the plate member, the adhesive does not penetrate into the resin sintered body. . Therefore, a sufficient amount of liquid lubricant can be impregnated even after the porous resin sintered body is bonded to the plate member.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an overall configuration of a linear motion guide device according to a first embodiment of the present invention, and FIG. 2 is a diagram showing a part of it in an exploded manner. 1, a linear motion guide device 10 according to the present embodiment has a guide rail 11 having a substantially rectangular cross section, a Gothic arch-shaped rolling element rolling groove 12 formed on both side surfaces of the guide rail 11, and The rolling element rolling groove 12 is provided with a slider 13 which is engaged with a plurality of spherical rolling elements (not shown) so as to be relatively movable in the longitudinal direction of the guide rail 11. Furthermore, the linear motion guide device 10
As shown in FIG. 2, a reinforcing plate 15 made of metal, which is a plate-like member attached to the slide-side end surface of the slider 13 by a plurality of setscrews 14, is provided. The porous resin sintered body 16 forming the lubricant supply member for supplying the lubricant is adhered with an adhesive having a kinematic viscosity at 40 ° C. of 100 cSt to 2000 cSt, for example.

The resin sintered body 16 is formed of, for example, ultra-high molecular weight polyethylene powder-sintered. The resin sintered body 16 adhered to the plate member 15 includes paraffin hydrocarbon oil and naphthene. Liquid lubricants such as hydrocarbon oils, mineral oils, ether oils and ester oils are impregnated. In addition, the resin sintered body 16 is the rolling element rolling groove 1 of the guide rail 11.
2 has a lip 17 (see FIG. 2) slidably contacting with the resin sintered body 16. The liquid lubricant impregnated in the resin sintered body 16 exudes from the inner peripheral portion of the lip 17 and other resin sintered bodies, and the guide rail 11 The rolling element rolling groove 12 and the upper surface of the rolling element are provided. The reinforcing plate 15 is provided with a grease nipple attachment hole 15a for attaching the grease nipple 18 shown in FIG. 1 to the end cap 13a of the slider 13. Further, the resin sintered body 1 adhered to the plate member 15
A side seal 21 is attached to 6 by a set screw 14.

When the resin sintered body 16 of the linear motion guide device 10 is impregnated with a liquid lubricant such as mineral oil, the resin sintered body 16 is adhered to the reinforcing plate 15 after the liquid lubricant is impregnated. Since it is difficult to bond the resin sintered body 16 to the reinforcing plate 1,
The liquid lubricant is impregnated into the resin sintered body 16 after being adhered to the No. 5 resin. At this time, the kinematic viscosity at 40 ° C. is 100 cSt to 20 as an adhesive agent for adhering the resin sintered body 16 to the reinforcing plate 15.
When the adhesive of 00 cSt is used, the adhesive applied to the resin sintered body 16 or the reinforcing plate 15 does not penetrate into the resin sintered body 16. Therefore, in this embodiment, the resin sintered body 16 can be bonded to the reinforcing plate 15 without penetrating the adhesive to the inside of the resin sintered body 16, whereby the porous resin sintered body 16 can be bonded to the reinforcing plate 15. Even after being adhered to 15, a sufficient amount of liquid lubricant can be impregnated.

In this embodiment, the kinematic viscosity of the adhesive for adhering the resin sintered body 16 to the reinforcing plate 15 at 40 ° C. is 100.
Since it is cSt to 2000 cSt, when the resin sintered body 16 is bonded to the reinforcing plate 15, the adhesive can be easily pushed out from the syringe, whereby the resin sintered body 16
Can be efficiently adhered to the reinforcing plate 15. In the embodiment described above, the kinematic viscosity at 40 ° C. is 100 cSt to 2000 as an adhesive agent for adhering the resin sintered body 16 to the reinforcing plate 15.
Although the adhesive of cSt is used, the present invention is not limited to this, and the point is that the adhesive has a viscosity that makes it difficult for the adhesive to penetrate into the resin sintered body 16. Further, in the above-described embodiment, the powder sintered ultra high molecular weight polyethylene is used as the resin sintered body 16. However, the present invention is not limited to this, and considering the liquid retaining property of the liquid lubricant. ,
Polypropylene and polyester are suitable.

In the above-described embodiment, the adhesive is used as a means for adhering the resin sintered body, which is the lubricant-containing member, to the reinforcing plate, which is the plate-shaped member, but in the second embodiment shown in FIG. As described above, the adhesive tape 20 may be used as a means for adhering the resin sintered body 16 to the reinforcing plate 15. in this way,
By using the adhesive tape 20 as a means for adhering the resin sintered body 16 to the reinforcing plate 15, since the adhesive does not penetrate into the resin sintered body 16, the porous resin sintered body 16 is reinforced. Even after bonding to the plate 15, a sufficient amount of liquid lubricant can be impregnated, and the bonding work is simple. In this case, as the pressure-sensitive adhesive of the pressure-sensitive adhesive tape 20, for example, a hot-melt adhesive containing ethylene α-olefin copolymer or ethylene-vinyl acetate copolymer as a main component and a tackifier such as saturated petroleum resin is added. Is preferred. Alternatively, a commercially available double-sided adhesive tape may be used.

[0014]

As described above, according to the linear motion guide device of the first aspect of the present invention, the adhesive applied to the resin sintered body or the reinforcing plate does not penetrate into the resin sintered body. Therefore, a sufficient amount of liquid lubricant can be impregnated even after the porous resin sintered body (lubricant-containing member) is bonded to the reinforcing plate (plate-shaped member).

According to the linear motion guide device of the invention of claim 2, the resin sintered body can be adhered to the reinforcing plate without using a liquid adhesive as a means for adhering the resin sintered body to the reinforcing plate. Since the adhesive does not penetrate inside the resin sintered body, it is possible to impregnate a sufficient amount of liquid lubricant even after the porous resin sintered body has been bonded to the reinforcing plate. Can be done easily.

[Brief description of drawings]

FIG. 1 is a perspective view of a linear motion guide device according to a first embodiment of the present invention.

FIG. 2 is an exploded view of a part of the linear motion guide device shown in FIG.

FIG. 3 is an exploded view showing a part of a linear motion guide device according to a second embodiment of the present invention.

[Explanation of symbols]

11 Guide rail 12 Rolling element rolling groove 13 slider 15 Reinforcement plate (plate member) 16 Resin sintered body (lubricant-containing member) 17 lips 18 Grease nipple 20 Adhesive tape 21 Side seal

Claims (2)

[Claims] 1. A guide rail having a rolling element rolling groove on an outer surface thereof, and a guide rail engaging with the rolling element rolling groove of the guide rail so as to be relatively movable in the longitudinal direction of the guide rail through a large number of rolling elements. In a linear motion guide device including a slider, a plate-shaped member attached to the slide-side end surface of the slider, and a lubricating oil-containing member adhered to the plate-shaped member, the lubricating oil-containing member is a porous resin-fired member. When the resin sintered body is formed of a bonded body and the resin-sintered body is bonded to the plate-shaped member, the viscosity of the adhesive is such that the adhesive does not easily penetrate into the inside of the seal member, and then the resin-baked product is bonded. A linear motion guide device characterized in that a bonded body is impregnated with a liquid lubricant. 2. A guide rail having a rolling element rolling groove on an outer surface, and a guide rail which engages with the rolling element rolling groove of the guide rail so as to be relatively movable in the longitudinal direction of the guide rail through a large number of rolling elements. In a linear motion guide device including a slider, a plate-shaped member attached to the slide-side end surface of the slider, and a lubricating oil-containing member adhered to the plate-shaped member, the lubricating oil-containing member is a porous resin-fired member. A linear motion guide device, which is formed of a bonded body, wherein the resin sintered body is adhered to the plate-like member with an adhesive tape, and then the resin sintered body is impregnated with a liquid lubricant.