JP5250966B2 - Linear motion device and method for manufacturing seal member for linear motion device - Google Patents

Description

  The present invention relates to a linear motion device such as a ball screw, a linear guide, and a ball spline, and a manufacturing method of a seal member for the linear motion device, and in particular, a linear motion device and a straight line capable of preventing dust from entering the device. The present invention relates to a manufacturing method of a seal member for an exercise device.

2. Description of the Related Art Conventionally, for example, a rolling bearing with a seal shown in FIG. 10 has been known as an invention of an exercise apparatus provided with a seal member that prevents dust from entering the apparatus (see Patent Document 1).
A rolling bearing 40 with seal shown in FIG. 10 is freely rollable between an inner ring 42 having an inner ring raceway 41 on an outer peripheral surface, an outer ring 44 having an outer ring raceway 43 on an inner peripheral face, and the inner ring raceway 41 and the outer ring raceway 43. And a plurality of rolling elements 45 provided in.

Further, the seal rolling bearing 40 is provided between an outer circumferential surface 46 in one axial direction of the inner ring 42 and an inner circumferential surface 47 in one axial end portion of the outer ring 44, and closes between these circumferential surfaces. A seal ring 48 is provided.
Each of the seal rings 48 includes a metal reinforcing plate 49 formed in an annular shape and a sealing material 50 reinforced by the reinforcing plate 49.

Moreover, in patent document 1, the seal ring 51 shown in FIG. 11 is disclosed as a modification of the seal ring 48 with which the rolling bearing 40 with a seal is equipped.
The seal ring 51 is attached with a sealing material 53 on one side of an annular reinforcing plate 52 so that both inner and outer peripheral edges of the sealing material 53 protrude from both inner and outer peripheral edges of the reinforcing plate 52.
Here, the seal ring 51 is formed by the following procedure.

First, after applying a rubber material mixed with a rubber material containing a filler made of NBR as a main raw material and a vulcanizing agent to one side of a metal plate which is a base of the reinforcing plate 52, the rubber plate is heated at a temperature of 170 to 220 ° C. Vulcanization treatment is performed for 2 to 5 minutes. Next, a part of the metal plate having an NBR layer formed on one side is punched into an annular shape. Here, when such punching is performed, the NBR cutting position formed on one surface of the metal plate deviates from the cutting position of the metal plate, so that the NBR layer bulges outward from the metal plate. Furthermore, the imperviousness of the seal ring oil is improved by heat-treating the punched reinforcing plate and the sealing material at 120 to 200 ° C. for 10 minutes to 5 hours.
Conventionally, as an invention of a manufacturing method of a seal member provided in an exercise device, for example, a manufacturing method of a bearing seal shown in FIG. 12 is known (see Patent Document 2).

In the manufacturing method of the bearing seal shown in FIG. 12, a laminated plate 62 formed by integrating a rubber elastic seal layer 60 on a steel plate 61 by baking adhesion, coating or the like is set between upper and lower molds 63 and 64. And it adopts a structure that punches at once. The bearing seal 65 formed by such punching press processing has an inner bulging portion 66 at the inner peripheral edge of the elastic seal layer. In the method for manufacturing a bearing seal according to Patent Document 2, after the punching press process, the elastic seal layer 60 is re-vulcanized under conditions where the temperature is higher than 200 ° C. and the time is less than 10 minutes. As a result, the surface state of the elastic seal layer 60 after press working is improved to a stable state in which the rubber residue or the like is not detached, thereby improving the quality.
Japanese Patent Laid-Open No. 10-54420 JP 2005-172041 A

However, in the rolling bearing with seal 40 according to Patent Document 1, the seal ring 51 is formed so that both the inner and outer peripheral edges of the seal material 53 bulge outward with respect to the reinforcing plate 52. There is a problem that the wear of the seal ring 51 is low due to severe wear.
In the method for manufacturing a bearing seal according to Patent Document 2, the elastic seal layer 60 is expanded beyond the cut surface of the steel plate 61 by punching and pressing the steel plate 61 with the elastic seal layer 60 integrated therein. Since it is set as the structure, when it is set as the structure provided with the elastic seal layer 60 in multiple layers, there exists a problem that the edge part of each elastic seal layer 60 becomes uneven.

The present invention has been made to solve the above-described problems of the prior art, and an object thereof is a linear motion device capable of improving the durability of the seal member by reducing the wear of the flexible sheet. Is to provide.
Another object of the present invention is to provide a method of manufacturing a seal member for a linear motion device capable of aligning the end portions of a soft sheet protruding from a reinforcing sheet.

A linear motion device according to a first aspect of the present invention includes a guide shaft having a spiral or linear rolling element rolling groove, and a spiral or linear rolling shaft facing the rolling element rolling groove of the guide shaft. A movable body having a moving body rolling groove, a number of rolling bodies provided in a freely rolling manner between the rolling body rolling groove of the guide shaft and the rolling body rolling groove of the movable body, A linear motion device comprising a seal member provided at an end portion and in sliding contact with an outer peripheral surface of the guide shaft,
The sealing member includes the flexible sheet and the reinforcing sheet so that the flexible sheet is provided on at least one of the front and back surfaces of the sealing member from a plurality of flexible sheets and at least one reinforcing sheet. Are formed in multiple layers, and a lubricating oil reservoir is formed between the adjacent flexible sheets by only sliding the outer peripheral surface of the guide shaft with only the end portions of the flexible sheets provided in a plurality of layers.
The lubricating oil reservoir stores lubricating oil supplied by a lubricant supply member provided in a seal cap connected to an end of the movable body during relative movement between the guide shaft and the movable body, Supply the stored lubricating oil between the inner peripheral end of the flexible sheet and the outer peripheral surface of the guide shaft ,
The flexible sheet is formed of a material having high heat resistance to the reinforcing sheet,
The seal member punches a multilayer sheet formed by laminating the flexible sheet and the reinforcing sheet from the reinforcing sheet side, and heats a punched portion of the multilayer sheet after punching the multilayer sheet. Thereby, it is formed by heat-shrinking only the punched portion of the reinforcing sheet .

Moreover , the manufacturing method of the sealing member for linear motion devices which concerns on Claim 2 among this invention is the following.
A method of manufacturing a linear motion device seal member that forms a linear motion device seal member by punching a multilayer sheet formed by laminating a flexible sheet and a reinforcing sheet,
The flexible sheet is formed of a material having high heat resistance to the reinforcing sheet,
The multilayer sheet is punched from the reinforcing sheet side,
After the punching of the multilayer sheet, only the punched portion of the reinforcing sheet is thermally contracted by heating the punched portion of the multilayer sheet.

  According to the linear motion device according to claim 1 of the present application, the sealing member is provided with the flexible sheet on at least one of the front and back surfaces of the sealing member from a plurality of flexible sheets and at least one reinforcing sheet. As described above, the flexible sheets and the reinforcing sheets are alternately laminated to form a multilayer, and only the end portions of the plurality of the flexible sheets provided adjacent to each other are in sliding contact with the outer peripheral surface of the guide shaft. With the configuration in which the lubricating oil reservoir is formed between the flexible sheets, it is possible to improve the durability of the seal member by reducing wear of the flexible sheets.

  Further, according to the linear motion device according to claim 2 of the present application, the flexible sheet is formed of a material having high heat resistance with respect to the reinforcing sheet, and the sealing member includes the flexible sheet and the reinforcing sheet. A multilayer sheet constituted by stacking is punched from the reinforcing sheet side, and after punching the multilayer sheet, the punched part of the multilayer sheet is heated to heat-shrink only the punched part of the reinforcing sheet. The structure formed by reducing the wear of the flexible sheet makes it possible to easily form a seal member that can improve the durability.

  Furthermore, in the manufacturing method of the sealing member for linear motion device according to claim 3 of the present application, the flexible sheet is formed of a material having high heat resistance with respect to the reinforcing sheet, and the multilayer sheet is on the reinforcing sheet side. Of the flexible sheet protruding from the reinforcing sheet by a configuration in which only the punched portion of the reinforcing sheet is thermally contracted by heating the punched portion of the multilayer sheet after punching the multilayer sheet. It is possible to align the ends.

Hereinafter, a linear motion device according to a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view of a ball screw according to a first embodiment of the present invention. FIG. 2 is a front view of the seal member. FIG. 3 is a detailed view of part A of the seal member.
The linear motion device according to the present invention can be configured as a ball screw, a linear guide, a ball spline, etc. In this embodiment, the linear motion device according to the present invention is configured as a ball screw as an example. explain.

As shown in FIG. 1, the ball screw (linear motion device) 1 includes a linearly extending screw shaft (guide shaft) 2, a nut (movable body) 3 into which the screw shaft 2 is inserted, and end faces of the nut 3. And two sets of seal caps 6 connected to each other.
The screw shaft 2 is formed in a cylindrical shape, and a spiral rolling element rolling groove 4 is formed on the outer peripheral surface.

The nut 3 is formed in a cylindrical shape, and a helical rolling element rolling groove 5 that is opposed to the rolling element rolling groove 4 of the screw shaft 2 when the screw shaft 2 is fitted is formed on the inner peripheral surface. ing.
The screw shaft 2 and the nut 3 can freely roll a large number of rolling elements 7 between the rolling element rolling grooves 4 and the rolling element rolling grooves 5 with the nut 3 fitted in the screw shaft 2. Are combined by incorporating them into

  Each seal cap 6 is formed in a cylindrical shape. Inside the seal cap 6, a lubricant supply member 10 that supplies lubricant to the rolling element rolling groove 4 of the screw shaft 2 and a cutting attached to the screw shaft 2. A seal member 11 is provided to prevent foreign matter such as powder or grinding powder from entering between the screw shaft 2 and the nut 3. The seal cap 6 is fitted to a point 19 provided on the end surface of the nut 3 so as to be freely positioned in the circumferential direction of the nut 3, thereby sealing the outer peripheral surface of the screw shaft 2. The position of the inner peripheral end 14 of the member 11 can be adjusted.

  As shown in FIGS. 2 and 3, the seal member 11 is formed in an annular shape, and is formed in a multilayer by laminating a plurality of flexible sheets 12 and at least one reinforcing sheet 13. Further, at least one of the front and back surfaces of the seal member 11 is formed so that the flexible sheet 12 is provided. Here, in this embodiment, the sealing member 11 is formed in four layers by alternately laminating and adhering the two flexible sheets 12 and the two reinforcing sheets 13.

  Each flexible sheet 12 is formed in an annular shape, is formed of a material having an Asker C hardness of about 5 to 50, and is formed of a silicon rubber sheet having a thickness of 0.4 mm in this embodiment. By forming the flexible sheet 12 from such a material, it can be deformed following the shape of the outer peripheral surface of the screw shaft 2 without being too hard, and can be provided with a desired shape retaining property without being too soft. The flexible sheet 12 is made of a material having high heat resistance with respect to the reinforcing sheet 13. The flexible sheet 12 is preferably formed of a rubber material having high heat resistance, and can be formed of fluorine rubber or the like other than silicon rubber.

  Each reinforcing sheet 13 is formed in an annular shape, is formed of a material having a durometer D scale of about 30 to 85, and in this embodiment is formed of a polyethylene terephthalate film having a thickness of 0.5 mm. By forming the reinforcing sheet 13 from such a material, physical properties such as dimensional stability are improved, and it is possible to give the flexible sheet 12 reinforcing properties and to suppress stretchability. In addition, the reinforcing sheet 13 includes a styrene thermoplastic resin stretched film (Mitsubishi Resin Co., Ltd. DXL219-45), a hard vinyl chloride heat-shrinkable resin stretched film (Mitsubishi Resin Co., Ltd. Hisilex 502), and a polyester thermoplastic resin. It is preferably formed of a highly heat-shrinkable material such as a stretched film (Mitsubishi Resin Corporation Hishipet LX-10), but a material that does not necessarily have high heat-shrinkability, such as polyester, nylon, polyimide resin, and acrylic resin. You may form by.

Here, in this embodiment, the flexible sheet 12 is formed of a material having an Asker C hardness of about 5 to 50, and the reinforcing sheet 13 is formed of a material of about 30 to 85 on a durometer D scale. However, the present invention is not limited to this configuration. If the hardness difference between the material forming the flexible sheet 12 and the material forming the reinforcing sheet 13 is 30 or more on the durometer A scale, I do not care.
The seal member 11 is inserted into a seal mounting hole 16 formed on the end surface of the seal cap 6 and fixed to the seal cap 6 by screws 18 inserted through a plurality of screw insertion holes 17 formed in the seal member 11. The

  Here, at the inner peripheral end portion of the sealing member 11 formed in an annular shape, each of the flexible sheets 12 among the flexible sheet 12 and the reinforcing sheet 13 formed in multiple layers is located inside the reinforcing sheet 13. It is formed so as to protrude in the direction. With this configuration, when the screw shaft 2 and the nut 3 are combined, only the inner peripheral end portion 14 of the plurality of flexible sheets 12 is in sliding contact with the outer peripheral surface of the screw shaft 2, and the adjacent soft sheets The lubricating oil reservoir 15 is formed between the twelve.

Next, a method for manufacturing the seal member 11 will be described.
FIG. 4 is a sectional view of the mold. FIG. 5 is a detailed cross-sectional view of part B of the mold. FIG. 6 is a detailed view showing a state in which a multilayer sheet is punched by a mold. FIG. 7 is a detailed view of the punched portion of the multilayer sheet.
As shown in FIG. 4, the multilayer sheet punching apparatus 20 includes a base plate 21 and a mold 22 provided on the lower surface of the base plate 21.

As shown in FIG. 5, the mold 22 has a blade portion 25 formed on the lower surface. The mold 22 is configured to be heated by a heating means (not shown). Here, although the blade part 25 is formed on a double-edged blade in this embodiment, it may be formed on a single-edged blade, and the angle of the blade edge in each case is 40 ° to 80 ° in the case of a double-edged blade. In this case, it is preferable that the angle is 20 ° to 40 °.
In manufacturing the sealing member 11, first, the flexible sheets 12 and the reinforcing sheets 13 are alternately stacked to form the multilayer sheet 26. In this case, one of the front and back surfaces of the multilayer sheet 26 is formed by the flexible sheet 12, and the other is formed by the reinforcing sheet 13.

Next, the formed multilayer sheet 26 is placed on a blade protecting floor plate 24 placed on the upper surface of the bed 23 with the reinforcing sheet 13 side facing the mold 22 side.
Then, the base plate 21 is moved downward in the vertical direction, and the multilayer sheet 26 is punched from the reinforcing sheet 13 side by the blade portion 25 of the mold 22 as shown in FIG.
Furthermore, after punching out the multilayer sheet 26 by the mold 22, the stamp 22 is heated by heating the mold 22, thereby heating the punched portion 27 of the multilayer sheet 26 through the blade portion 25, whereby the seal member 11 is manufactured.

Here, when only the multilayer sheet 26 is punched by the mold 22, the punched portion 27 of the multilayer sheet 26 includes the punched portion 27 of the flexible sheet 12 and the reinforcing sheet 13 as shown in FIG. The punched portion 27 is almost a series.
On the other hand, when the punched portion 27 of the multilayer sheet 26 is heated after punching the multilayer sheet 26 with the mold 22, the flexible sheet 12 is formed of a material having high heat resistance with respect to the reinforcing sheet 13 in the multilayer sheet 26. Therefore, as shown in FIG. 7B, in the multilayer sheet 26, only the punched portion 27 of the reinforcing sheet 13 out of the punched portion 27 of the multilayer sheet 26 is thermally contracted.

  That is, in the sealing member 11 manufactured by such a method, the step between the reinforcing sheet 13 and the flexible sheet 12 is not formed by bulging the flexible sheet 12 by pressing with the mold 22. In the punched portion 27 of the multilayer sheet 26, only the reinforcing sheet 13 is thermally contracted. Therefore, in the sealing member 11, it is possible to align the end portions of the flexible sheets 12 that protrude with respect to the reinforcing sheet 13, and the sealing effect can be enhanced.

  Here, the heating of the multilayer sheet 26 by the mold 22 does not heat the entire multilayer sheet 26 for a long time, but instantaneously only the punched part 27 in contact with the blade part 25 of the mold 22 of the multilayer sheet 26. It is performed by heating to the target (heating holding time 1 s or less). With this configuration, it is possible to shrink only the punched portion 27 of the reinforcing sheet 13 of the multilayer sheet 26 and prevent the entire multilayer sheet 26 from being deformed.

  Then, according to the sealing member 11 formed by the multilayer sheet punching device 20, the inner peripheral end portion 14 of each flexible sheet 12 at the inner peripheral end portion 14 is inward of the inner peripheral end portion of each reinforcing sheet 13. When the screw shaft 2 and the nut 3 are combined, only the inner peripheral end portion 14 of the flexible sheet 12 is in sliding contact with the outer peripheral surface of the screw shaft 2, so that the adjacent flexible sheets 12 In this case, the lubricating oil reservoir 15 is formed. With this configuration, it is possible to easily form the seal member 11 capable of improving durability by reducing wear of the flexible sheet 12.

Here, in the present embodiment, the punching portion 27 of the multilayer sheet 26 is heated by heating the mold 22, but is not limited to this method, and the multilayer sheet formed by the mold 22 is used. After punching 26, the punching part 27 of the multilayer sheet 26 may be heated by another method.
Further, the punched portion 27 of the flexible sheet 12 of the seal member 11 shown in FIG. 7 is in a state of being punched in a straight line, but the punched portion 27 of the flexible sheet 12 is heated after punching of the seal member 11. It may be configured to melt and round the edge.

Next, the operation of the ball screw 1 will be described.
In the ball screw 1, when the screw shaft 2 and the nut 3 are combined, the rolling element 7 rolls on the rolling element rolling grooves 4 and 5 in accordance with the rotational movement of the screw shaft 2 or the nut 3. Thus, the screw shaft 2 and the nut 3 are relatively movable in the axial direction.
When the screw shaft 2 and the nut 3 are moved relative to each other, the inner peripheral end portion 14 of the seal member 11 is in sliding contact with the outer peripheral surface of the screw shaft 2. It is possible to prevent the rolling motion of the rolling element 7 from being hindered by the entry of foreign matter such as dust.

  Here, in the inner peripheral end portion 14 of the sealing member 11 formed in multiple layers by the flexible sheet 12 and the reinforcing sheet 13, only the inner peripheral end portion 14 of the plural flexible sheets 12 provided on the screw shaft 2 is provided. The lubricating oil reservoir 15 is formed between the adjacent flexible sheets 12 by sliding contact with the outer peripheral surface. The lubricating oil reservoir 15 stores the lubricating oil supplied by the lubricating oil supply member 10 provided in the seal cap 6 when the screw shaft 2 and the nut 3 are moved relative to each other and softens the stored lubricating oil. Since the sheet is appropriately supplied between the inner peripheral end portion 14 of the sheet 12 and the outer peripheral surface of the screw shaft 2, the durability of the seal member 11 can be improved by reducing the wear of the flexible sheet 12. .

Next, a linear motion device according to a second embodiment of the present invention will be described with reference to the drawings.
FIG. 8 is a configuration diagram of a linear guide according to the second embodiment of the present invention. FIG. 9 is a sectional view of the inner peripheral end of the seal member.
In this embodiment, a case where the linear motion device according to the present invention is configured as a linear guide will be described as an example.

As shown in FIG. 8, the linear guide (linear motion device) 30 includes a guide rail (guide shaft) 31 that extends linearly, a slider (movable body) 32 that is combined across the guide rail 31, and each of the sliders 32. And a seal member 33 connected to the end face.
The guide rail 31 is formed in a square shape. On the outer surface of the guide rail 31, a linear rolling element rolling groove 35 is formed at a ridge line portion where the upper surface and each side surface cross each other and at an intermediate position between each side surface. Is formed.

The slider 32 includes a slider body 36 having a substantially U-shaped cross section in a direction orthogonal to the longitudinal direction of the guide rail 31, and end caps 37 attached to both end surfaces of the slider body 36 in the longitudinal direction.
The slider body 36 has linear rolling element rolling grooves (not shown) on the inner side surfaces on both the left and right sides that face the rolling element rolling grooves 35 of the guide rail 31 when the slider 32 and the guide rail 31 are combined. Is formed.

A rolling element rolling path (not shown) is constituted by the rolling element rolling grooves 35 of the guide rail 31 and the both rolling element rolling grooves of the slider body 36. The slider main body 36 includes two rolling element return paths (not shown) each having a circular through-hole penetrating in the axial direction at the upper and lower portions of the thick portion of the sleeve portion 39.
The end cap 37 has a curved path (not shown) that allows the rolling element rolling groove of the slider body 36 to communicate with the rolling element return path parallel to the rolling element rolling groove, and the rolling element rolling path and the rolling element return path. A rolling element circulation path (not shown) is formed by the curved paths at both ends.

In the linear guide 30, a large number of rolling elements (not shown) are slidably loaded in the rolling element circulation path, and the rolling element infinitely circulates in the rolling element circulation path, whereby the guide rail 31 and the slider 32 are provided. And are configured to be relatively movable.
The seal member 33 has a substantially U-shaped cross section in a direction perpendicular to the longitudinal direction, and is supplied with lubricating oil by screws 38 inserted into a plurality of screw insertion holes (not shown) formed in the seal member 33. It is attached to each end surface in the longitudinal direction of the end cap 37 via a member (not shown).

  Here, the structure and manufacturing method of the seal member 33 are the same as those of the seal member 11, and the inner peripheral end portion of the seal member 33 having a substantially U-shaped cross section has a multilayer structure as shown in FIG. Of the flexible sheet 12 and the reinforcing sheet 13 formed in the above, the inner peripheral end 34 of each flexible sheet 12 is formed so as to protrude inward with respect to the inner peripheral end of each reinforcing sheet 13. . With this configuration, when the slider 32 and the guide rail 31 are combined, only the inner peripheral end portion 34 of the plurality of flexible sheets 12 is in sliding contact with the outer peripheral surface of the guide rail 31, and the adjacent flexible sheets The lubricating oil reservoir 15 is formed between the twelve.

  As a result, according to the seal member 33, the inner peripheral end 34 of the seal member 33 comes into sliding contact with the outer peripheral surface of the guide rail 31 when the guide rail 31 and the slider 32 move relative to each other. Therefore, it is possible to prevent the rolling motion of the rolling element from being hindered by foreign matter such as dust entering between 32 and 32. In this case, the lubricating oil reservoir 15 formed at the inner peripheral end portion 34 of the seal member 33 stores the lubricating oil supplied by the lubricating oil supply member when the guide rail 31 and the slider 32 move relative to each other. In addition, since the stored lubricating oil is appropriately supplied between the inner peripheral end 34 of the flexible sheet 12 and the outer peripheral surface of the guide rail 31, the durability of the seal member 33 is reduced by reducing the wear of the flexible sheet 12. It becomes possible to improve the property.

Although the embodiments of the present invention have been described above, various modifications can be made in the embodiments of the present invention.
For example, in the first and second embodiments of the present invention, the linear motion device according to the present invention is configured as a ball screw or a linear guide, but can be configured as other linear motion devices, and the seal The members 11 and 33 can be configured as a bearing seal, a ball spline seal, or the like.

It is a top view of the ball screw concerning a first embodiment of the present invention. It is a front view of a sealing member. It is A section detail drawing of a sealing member. It is sectional drawing of a metal mold | die. It is B section detailed sectional drawing of a metal mold | die. It is detail drawing which shows the state of the punching of the multilayer sheet by a metal mold | die. It is detail drawing of the punching part of a multilayer sheet. It is a block diagram of the linear guide which concerns on 2nd embodiment of this invention. It is sectional drawing of the inner peripheral end part of a sealing member. It is a block diagram of the rolling bearing with a seal concerning patent documents 1. It is sectional drawing of the seal ring which concerns on patent document 1. FIG. It is explanatory drawing of the manufacturing method of the seal | sticker for bearings concerning patent document 2. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ball screw 2 Screw shaft 3 Nut 4 Rolling body rolling groove 5 Rolling body rolling groove 6 Seal cap 7 Rolling body 10 Lubricating oil supply member 11 Seal member 12 Flexible sheet 13 Reinforcement sheet 14 Inner peripheral edge 15 Lubricating oil reservoir DESCRIPTION OF SYMBOLS 16 Seal mounting hole 17 Screw insertion hole 18 Screw 19 Point 20 Multi-layer sheet punching device 21 Base plate 22 Die 23 Bed 24 Blade protection blade 25 Blade portion 26 Multi-layer sheet 27 Punching portion 30 Linear guide 31 Guide rail 32 Slider 33 Seal member 34 Inner peripheral edge 35 Rolling element rolling groove 36 Slider body 37 End cap 38 Screw 39 Sleeve 40 Rolling bearing with seal 41 Inner ring raceway 42 Inner ring 43 Outer ring raceway 44 Outer ring 45 Rolling element 46 Axial one end outer peripheral surface 47 Axial direction Inner peripheral surface of one end 48 Seal ring 49 Reinforcing plate 5 The sealing member 51 sealing ring 52 reinforcing plate 53 sealing material 60 elastic sealing layer 61 steel 62 laminates 63 mold 64 for mold 65 bearing seal 66 bulging portion

Claims (2)

A guide shaft having a spiral or linear rolling element rolling groove; a movable body having a spiral or linear rolling element rolling groove facing the rolling body rolling groove of the guide shaft; and A large number of rolling elements provided between the rolling element rolling grooves and the rolling element rolling grooves of the movable body, and provided at end portions of the movable body, and slide on the outer peripheral surface of the guide shaft. A linear motion device comprising a sealing member in contact with the seal member,
The sealing member includes the flexible sheet and the reinforcing sheet so that the flexible sheet is provided on at least one of the front and back surfaces of the sealing member from a plurality of flexible sheets and at least one reinforcing sheet. Are formed in multiple layers, and a lubricating oil reservoir is formed between the adjacent flexible sheets by only sliding the outer peripheral surface of the guide shaft with only the end portions of the flexible sheets provided in a plurality of layers.
The lubricating oil reservoir stores lubricating oil supplied by a lubricant supply member provided in a seal cap connected to an end of the movable body during relative movement between the guide shaft and the movable body, Supply the stored lubricating oil between the inner peripheral end of the flexible sheet and the outer peripheral surface of the guide shaft,
The flexible sheet is formed of a material having high heat resistance to the reinforcing sheet,
The seal member punches a multilayer sheet formed by laminating the flexible sheet and the reinforcing sheet from the reinforcing sheet side, and heats a punched portion of the multilayer sheet after punching the multilayer sheet. it allows the reinforcing sheet of the punched portion only straight line motion device you characterized in that it is formed by heat shrinkage. A method of manufacturing a linear motion device seal member that forms a linear motion device seal member by punching a multilayer sheet formed by laminating a flexible sheet and a reinforcing sheet,
The flexible sheet is formed of a material having high heat resistance to the reinforcing sheet,
The multilayer sheet is punched from the reinforcing sheet side,
A method for manufacturing a seal member for a linear motion device, wherein after punching of the multilayer sheet, only the punched portion of the reinforcing sheet is thermally contracted by heating the punched portion of the multilayer sheet.

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