JP5495730B2 - Exercise guidance device - Google Patents

Description

  The present invention relates to a motion guide device in which a guide shaft and a moving member are relatively movably engaged via rolling elements such as a ball or a roller, such as a linear guide device, a ball screw device, and a ball spline device.

  As this type of motion guide device, a spline shaft and a nut member are relatively linearly combined through a large number of balls, and are used for a torque transmission unit or the like in an industrial robot. A linear guide device that is used in a linear guide mechanism such as a machine or a conveyance device and guides a movable body such as a table on a fixed portion such as a bed or a saddle is known.

  The linear guide device includes a plurality of rolling elements, a guide shaft in which a rolling surface of the rolling element is formed along the longitudinal direction, and a load rolling roller that faces the rolling surface of the guide shaft via a number of rolling elements. A rolling member having a running surface and provided with an infinite circulation path of rolling elements that roll on the load rolling surface, the rolling member comprising a rolling surface of the guide shaft and a loaded rolling surface of the moving member; , The moving member supporting the movable body can linearly move along the guide shaft.

  In the linear guide device configured in this way, the rolling element rolls while applying a load between the rolling surface of the guide shaft and the load rolling surface of the moving member. Wear and wear of the rolling surface and the load rolling surface may occur, and as a result, the traveling accuracy of the moving member may decrease. Therefore, in the linear guide device, in order to suppress the wear of the rolling element itself and the wear of the rolling surface and the load rolling surface, a lubricating oil supply member is provided, and the rolling element, the rolling surface and the load rolling surface are provided. Lubricating oil is supplied. On the other hand, in order to prevent foreign matter such as work shavings and dust adhering to the surface of the guide shaft from entering the inside of the moving member, the guide shaft is attached to the front and rear ends in the moving direction of the moving member. A pair of sealing members having a sealing lip portion that is in close contact are provided.

  On the other hand, in addition to preventing entry of foreign matter adhering to the surface of the guide shaft into the moving member, a foreign matter removal means for removing the foreign matter has been proposed, and as an example of the specific means, What is disclosed in Japanese Patent Laid-Open No. 2008-175316 is known. The foreign matter removing means is arranged on the outside of the seal member, and is composed of a roller member that is in sliding contact with the guide shaft, and a removal member that rotates following the roller member and is formed in a brush shape. In the linear guide device having the foreign matter removing means having this configuration, the removal member rotates with the movement of the moving member, whereby the foreign matter attached to the surface of the guide shaft is swept outward. It is like that.

JP 2008-175316 A

  In a machine tool in which the linear guide device is frequently used, a strong alkaline coolant is often used for the purpose of suppressing heat generation of a workpiece to be machined. Under such a use environment, the coolant liquid falls on the surface of the guide shaft, and the coolant liquid adhering to the surface of the guide shaft corrodes the seal lip portion of the seal member formed of synthetic rubber such as urethane rubber. There was a fear. If such corrosion occurs, the coolant liquid enters the moving member through the guide shaft from the corroded portion of the seal lip portion and adheres to the surface of the rolling element, rolling surface, or the like. Lubricating oil will be washed away, leading to premature wear of rolling elements and rolling surfaces.

  In such an environment where the coolant liquid remains, it is possible to remove solid foreign matter such as workpiece shavings and dust when using the foreign matter removing means disclosed in JP 2008-175316 A. However, liquid foreign substances such as coolant liquid cannot be removed reliably. As described above, since the liquid foreign matter such as the coolant liquid cannot be removed, the liquid foreign matter enters the inside of the moving member through the guide shaft, and the early wear of the rolling elements and the rolling surface is also caused. There was a risk of being invited.

  The present invention has been made in view of such problems, and an object of the present invention is to reliably remove the liquid foreign matter adhering to the surface of the guide shaft and prevent the liquid foreign matter from entering the moving member. Then, it is providing the exercise | movement guide apparatus which can reduce early wear of a rolling element, a rolling surface, etc ..

  In order to achieve the object, a motion guide apparatus according to the present invention includes a plurality of rolling elements, a guide shaft in which a rolling surface of the rolling element is formed along a longitudinal direction, and a plurality of rolling elements on the guide shaft. A pair of moving members having an infinite circulation path for the rolling elements therein, and a pair of seal lip portions attached to both front and rear ends in the moving direction of the moving members and closely contacting the guide shaft A seal member, and a primary absorber that is disposed outside the seal member and absorbs liquid adhering to the surface of the guide shaft as the moving member moves.

  According to such a motion guide device of the present invention, since the primary absorber that absorbs the liquid adhering to the surface of the guide shaft is provided outside the seal members attached to the front and rear ends of the moving member, When the moving member moves along the guide shaft, the primary absorber absorbs the liquid adhering to the surface of the guide shaft prior to the movement of the moving member. For this reason, it is possible to prevent the seal lip portion of the seal member from being corroded by the liquid foreign matter adhering to the surface of the guide shaft, and thus to prevent the liquid member from entering the inside of the moving member via the guide shaft. be able to. As a result, it is possible to reduce early wear of the rolling elements and rolling surfaces due to the outflow of lubricating oil adhering to the rolling elements and rolling surfaces.

It is a disassembled perspective view which shows an example of the exercise | movement guide apparatus which can apply the absorption member of this invention. It is front sectional drawing which shows 1st embodiment of the absorption member of this invention. It is the III-III sectional view taken on the line of FIG. It is a schematic diagram which shows 2nd embodiment of the absorption member of this invention. It is front sectional drawing of the absorption member shown in FIG. It is a schematic diagram which shows 3rd embodiment of the absorption member of this invention. It is a schematic diagram which shows 4th embodiment of the absorption member of this invention. It is a schematic diagram which shows 5th embodiment of the absorption member of this invention. It is a schematic diagram which shows 6th embodiment of the absorption member of this invention.

  The motion guide apparatus of the present invention will be described below in detail with reference to the accompanying drawings.

  FIG. 1 is an exploded perspective view showing a linear guide device as an example of a motion guide device to which the present invention is applied. This linear guide device includes a track rail 1 as a guide shaft on which a rolling surface 11 of a ball 3 on which a ball 3 as a rolling element rolls in the longitudinal direction is formed, and a track rail 1 via the ball 3. And a moving block 2 as a moving member having an infinite circulation path for the ball 3 inside, and fixed to both front and rear ends in the moving direction of the moving block 2 and a track along with the movement of the moving block 2 A pair of lubricating oil supply members 4 for applying lubricating oil to the surface of the rail 1 and a pair of sealing members 5 provided on the outside of the lubricating oil supply member 4 with a seal lip portion 51 in close contact with the track rail 1. And an absorbing member 6 that is disposed outside the seal member 5 and absorbs liquid foreign matter adhering to the surface of the track rail 1 as the moving block 2 moves. The moving block 2 is adapted to reciprocate on the track rail 1 with the circulation of the balls. In FIG. 1, the lubricating oil supply member 4, the seal member 5, and the absorbing member 6 at one end of the moving block 2 are shown in order to simply represent the arrangement configuration of the lubricating oil supply member 4, the seal member 5, and the absorbing member 6. Is drawn.

  The track rail 1 has a substantially rectangular cross section, and a total of four rolling surfaces 11a and 11b on which the balls 3 roll are formed along the longitudinal direction. The rolling surface 11 a is formed on the upper surface of the track rail 1, while the rolling surface 11 b is formed on both side surfaces of the track rail 1.

  On the other hand, the moving block 2 includes a load rolling surface that forms a load passage for the ball 3 so as to face the rolling surfaces 11 a and 11 b of the track rail 1 and a ball return hole for circulating the ball 3. The block main body 21 and a pair of end plates 22 fixed to the front and rear end faces of the block main body 21 are configured. The end plate 22 is provided with a direction changing path for picking up the ball 3 from the load passage and feeding the ball 3 into the ball return hole of the block main body 21 while feeding the ball 3 from the ball return hole to the load passage. By fixing such a pair of end plates 22 to the moving block main body 21, an infinite circulation path of the ball 3 is completed in the moving block 2. The balls 3 in the endless circulation path are held by a synthetic resin belt in order to maintain the alignment state of the balls 3.

  The end plate 22 is provided with an oil supply port 23 for supplying lubricating oil to the infinite circulation path of the ball 3, and the oil supply port 23 has the lubricating oil supply member 4 and the seal member 5. In addition, a supply nipple is mounted via the absorbing member 6. Further, the lubricating oil supply member 4, the seal member 5, and the absorbing member 6 are mounted on the moving block 2 from above the end plates 22 by fixing bolts 24.

  In the linear guide device shown in FIG. 1, a ball is used as the rolling element, but a roller may be used as the rolling element.

  2 to 9 show an embodiment of the absorbing member 6. FIG. 2 is a front sectional view showing a first embodiment of the absorbing member 6, and FIG. 3 is a sectional view taken along line III-III in FIG. As shown in the drawing, the absorbing member 6 of the present embodiment includes a housing 61 that is fixed to the seal member 5, and is housed in the housing 61 and is in sliding contact with the track rail 1 on the surface of the track rail 1. Absorber 62 as a primary absorber that absorbs the adhering liquid foreign matter, and is accommodated in the housing 61 together with the absorber 62 without contacting the track rail 1, and absorbs the liquid foreign matter absorbed by the absorber 62. And an absorber tank 63 as a secondary absorber to be stored.

  The absorbent body 62 is made of a material that is liable to cause movement of liquid foreign matter due to capillary action, for example, a nonwoven fabric such as felt, foamed polyurethane, or the like so that the liquid foreign matter attached to the surface of the track rail 1 can be reliably absorbed. A porous body is suitable. On the other hand, the absorbent tank 63 is preferably made of a material that easily causes the movement of the liquid foreign matter absorbed by the absorbent body 62 due to capillary action, for example, a non-woven fabric such as felt or a porous material such as polyurethane foam. Here, since the absorber tank 63 absorbs and stores liquid foreign substances absorbed by the absorber 62, the porosity of the absorber tank 63 needs to be higher than that of the absorber 62.

  When this absorbing member 6 is applied to a motion guide device, the absorbing member 6 is fixed at the forefront in the direction of arrow A in FIG. 3, that is, the moving direction of the moving block 2. Prior to the movement of 2, the absorber 62 of the absorbing member 6 comes into sliding contact with the surface of the track rail 1.

  Therefore, the absorber 62 absorbs not only the liquid foreign matter adhering to the surface of the track rail 1 but also solid foreign matters such as fine powder. In such a case, if the absorbent body 62 excessively absorbs solid foreign matter, the absorbent body 62 may be clogged and may not function as a foreign matter absorbing means.

  Therefore, in the absorbing member 6 of the present embodiment, a solid matter removing filter 64 for removing solid foreign matters such as fine powder adhering to the surface of the track rail 1 is provided at the contact end of the absorber 62 with the track rail 1. Is provided. This solid matter removal filter 64 is provided on the outer side of the moving block 2 in the moving direction, and compared with the absorber 62 so as to remove solid foreign matters such as fine powder adhering to the surface of the track rail 1. My eyes are fine.

  As shown in FIG. 2, the solid matter removal filter 64 and the absorber 62 configured in this way are configured to enter the respective rolling surfaces 11 a and 11 b of the track rail 1. That is, the solid matter removal filter 64 and the absorber 62 are in sliding contact with the upper surface and both side surfaces of the track rail 1 without a gap.

  In the absorbent member 6 of the present embodiment, the solid material removal filter 64 is provided for the absorber 62 for the above reasons. However, depending on the use environment, that is, depending on the type of foreign matter attached to the surface of the track rail 1. Of course, it is possible to select a solid matter removal filter 64 suitable for that, and it is not necessary to provide the solid matter removal filter 64.

  According to the absorbing member 6 of the present embodiment, when the absorbing member 6 moves as the moving block 2 moves, the absorbent body 62 absorbs liquid foreign matters such as coolant liquid adhering to the surface of the track rail 1. It will be. For this reason, the liquid foreign matter adhering to the surface of the track rail 1 does not reach the seal lip portion 51 of the seal member 5, and corrosion of the seal lip portion 51 due to the liquid foreign matter can be prevented.

  In the present embodiment, when the capacity of the absorber tank 63 is small with respect to the life of the linear guide device, a liquid foreign material absorbing hole is provided in the housing 61, and the absorber tank is formed from the liquid foreign material absorbing hole. The liquid foreign matter absorbed and held in 63 may be periodically sucked. On the other hand, when it is difficult to provide the liquid foreign matter absorption hole, the length of the absorber tank 63 having the above configuration is set to be long, and the capacity of the absorber tank 63 is increased. There is no problem.

  4 and 5 are schematic views showing a second embodiment of the absorbing member. The absorbing member 7 of the present embodiment includes a housing 71 fixed to the seal member 5 and a liquid foreign matter that is accommodated in the housing 71 and that slides on the surface of the track rail 1 and adheres to the surface of the track rail 1. An endless absorption belt 72 as a rotation absorber that absorbs the absorption belt, and the housing 71 together with the absorption belt 72, the rotation roller 73 around which the absorption belt 72 is wound, and the housing 71. A discharge roller 74 as discharge means for discharging liquid foreign matter from the absorption belt 72 is configured.

  The absorbent belt 72 is preferably made of a porous material such as polyurethane foam, which is liable to cause movement of liquid foreign matter due to capillary action so that liquid foreign matter adhering to the surface of the track rail 1 can be reliably absorbed. ing.

  The rotating roller 73 includes a shaft 73a that is rotatably supported in the housing 71, and a roller portion 73b provided around the shaft 73a. The rotating rollers 73 are disposed on the upper surface and both side surfaces of the track rail 1, and the roller portions 73b of the rotating rollers 73 are formed so as to follow the shapes of the upper surface and both side surfaces of the track rail 1, as shown in FIG. Has been. That is, the roller portion 73b is formed so as to enter the rolling surfaces 11a and 11b of the track rail 1.

  Therefore, the absorption belt 72 wound around the rotating roller 73 is pressed against the surface of the track rail 1 by the rotating roller 73 so as to be in sliding contact with the surface of the track rail 1 without a gap. Therefore, the absorbing belt 72 can reliably absorb the liquid foreign matter adhering to the surface of the track rail 1.

  On the other hand, the discharge roller 74 includes a small-diameter roller 74a around which the absorption belt 72 is laid, and a large-diameter roller 74b formed with a larger diameter than the small-diameter roller 74a. The small-diameter roller 74a and the large-diameter roller 74b are rotatably supported in the housing 71 and arranged so as not to contact the surface of the track rail 1.

  The small-diameter roller 74a and the large-diameter roller 74b are configured to sandwich the absorption belt 72. For this reason, the absorption belt 72 wound around the small diameter roller 73a is pressed by the small diameter roller 74a and the large diameter roller 74b between the small diameter roller 74a and the large diameter roller 74b.

  In the absorbing member 7 of the present embodiment configured as described above, when the moving block 2 moves in the direction of arrow A along the track rail 1, the absorbing belt 72 that is in sliding contact with the surface of the track rail 1 is It rotates in the direction of arrow B while rotating the rotating roller 73. At this time, since the absorbing belt 72 is pressed by the rotating roller 73 and is in sliding contact with the surface of the track rail 1 without a gap, it is possible to reliably absorb the liquid foreign matter adhering to the surface. .

  On the other hand, the small-diameter roller 74a rotates in the direction of arrow C as the absorption belt 72 rotates, and the large-diameter roller 74b moves in the direction of arrow D following the rotation of the small-diameter roller 74a. Will rotate in the direction. At this time, the absorption belt 72 that has absorbed the liquid foreign matter is pressed between the small-diameter roller 74a and the large-diameter roller 74b of the discharge roller 74. By this pressing, the liquid foreign matter absorbed by the absorption belt 72 is discharged from the absorption belt 72, and the discharged liquid foreign matter is discharged out of the absorption member 7 by a discharge garter (not shown).

  Here, since the small diameter roller 74a and the large diameter roller 74b are arranged so as not to contact the surface of the track rail 1, the liquid discharged from the absorption belt 72 by the small diameter roller 74a and the large diameter roller 74b. Foreign matter does not adhere to the surface of the track rail 1 again.

  FIG. 6 is a schematic view showing a third embodiment of the absorbing member. The absorbing member 8 of the present embodiment has the same configuration as the absorbing member 7 with respect to the configuration of the housing to be fixed, the absorbing belt, and the rotating roller. For this reason, the fixed housing, the absorption belt, and the rotating roller are denoted by the same reference numerals and the description thereof is omitted. On the other hand, the absorbing member 7 is provided with a discharging means for discharging the liquid foreign matter absorbed by the absorbing belt, whereas the absorbing member 8 absorbs and stores the liquid foreign matter absorbed by the absorbing belt. Is provided. With respect to this configuration, both absorbent members are different.

  As shown in FIG. 6, the absorbing means 81 is in sliding contact with a pair of absorption reinforcing rollers 82 around which the absorption belt 72 is laid, and an absorption belt 72 laid around the pair of absorption reinforcing rollers 82. The absorption belt 72 includes an absorption roller 83 that absorbs liquid foreign substances.

  The absorption roller 83 includes a shaft 83a that is rotatably supported by the housing 71, and a roller portion 83b provided around the shaft 83a. Such an absorption roller 83 is disposed so as not to contact the surface of the track rail 1 so that the absorbed liquid foreign matter does not adhere to the surface of the track rail 1 again.

  The roller part 83b is made of a material that is liable to cause movement of liquid foreign matters due to capillary action, for example, a nonwoven fabric such as felt, or a porous material such as polyurethane foam, so that the liquid foreign matter absorbed by the absorption belt 72 can be reliably absorbed. The body is suitable. Here, since the roller 83b absorbs and stores the liquid foreign matter absorbed by the absorption belt 72, the porosity of the roller 83b needs to be higher than that of the absorption belt 72.

  Here, the reason why the two absorption reinforcing rollers 82 are provided in the present embodiment is that, by adopting this configuration, the absorption belt 72 and the absorption roller 83 laid between a pair of absorption reinforcing rollers 82 are provided. This is because the contact area can be increased. Thereby, the movement of the liquid foreign substance due to the capillary phenomenon from the absorption belt 72 to the absorption roller 82 can be ensured more reliably.

  In the absorbing member 8 having such a configuration, when the moving block 2 moves in the direction of the arrow A, the absorbing belt 72 that has absorbed the liquid foreign matter adhering to the surface of the track rail 1 has the rotating roller 73 and a pair of absorbing members. It rotates in the direction of arrow B while rotating the reinforcing roller 82. Following the rotation of the absorption belt 72, the absorption roller 83 also rotates in the direction of arrow C. At this time, since the absorption belt 72 is in sliding contact with the absorption roller 83 between the absorption reinforcement rollers 82, the liquid foreign matter absorbed by the absorption belt 72 moves to the absorption roller 83 by capillary action. Will be stored.

  As described above, in the absorbing member 8 of the present embodiment, the liquid foreign matter absorbed by the absorbing belt 72 is absorbed and stored in the absorbing roller 82. Therefore, the absorbing belt 72 that does not absorb the liquid foreign matter is provided. It always comes into sliding contact with the surface of the track rail 1. Therefore, according to the absorbing member 8, it is possible to reliably absorb the liquid foreign matter adhering to the surface of the track rail 1.

  In the present embodiment, when the capacity of the absorbing roller 82 is small with respect to the life of the linear guide device, the diameter of the absorbing roller 82 may be increased and the capacity of the absorbing roller 82 may be increased. There is no problem.

  FIG. 7 is a schematic view showing a fourth embodiment of the absorbing member. The absorbing member 9 of the present embodiment has the same configuration as the absorbing member 7 with respect to the configuration of the housing, the absorbing belt, and the rotating roller that are fixed. For this reason, the fixed housing, the absorption belt, and the rotating roller are denoted by the same reference numerals and the description thereof is omitted. On the other hand, the absorbing member 7 and the absorbing member 9 of the present embodiment have different configurations with respect to the following configurations.

  As shown in FIG. 7, the absorbing member 9 includes a feeding shaft 91 around which an absorbing belt 72 that does not absorb the liquid foreign matter is wound, and a winding shaft that winds up the absorbing belt 72 that has absorbed the liquid foreign matter. 92. The feed shaft 91 and the take-up shaft 92 are rotatably supported with respect to the housing 71. In addition, a synchronous belt 93 for synchronizing the rotation of the rotating roller 73 and the winding shaft 92 is wound around the shaft 73a and the winding direction of the absorbing belt 72 is set to one direction. An anti-reverse mechanism is provided.

  According to the absorbing member 9 of the present embodiment having the feed shaft 91 and the winding shaft 92, when the moving block 2 moves in the direction of the arrow A along the track rail 1, it slides on the surface of the track rail 1. The adsorbing belt 72 in contact moves in the direction of the arrow B while rotating the rotating roller 73, and absorbs the liquid foreign matter adhering to the surface of the track rail 1. As the absorption belt 72 rotates, the absorption belt 72 that has not absorbed the liquid foreign matter is drawn out from the delivery shaft 91. On the other hand, as the absorption belt 72 rotates, the winding shaft 92 around which the synchronous belt 93 is wound also rotates, and the winding shaft 92 winds up the absorption belt 72 that has absorbed the liquid foreign matter. It will be.

  As described above, the absorption belt 72 that has absorbed the liquid foreign matter is wound around the take-up shaft 92, while the absorption belt 72 that has not absorbed the liquid foreign matter is always in sliding contact with the surface of the track rail 1. For this reason, according to the absorbing member 9 of the present embodiment, the absorbing belt 72 can reliably absorb the liquid foreign matter adhering to the surface of the track rail 1.

  FIG. 8 is a schematic view showing a fifth embodiment of the absorber. The absorbing member 100 according to the present embodiment includes a housing 101 fixed to the seal member 5 and a liquid that is accommodated in the housing 101 and adheres to the surface of the track rail 1 while being in sliding contact with the surface of the track rail 1. It comprises an absorption storage roller 102 as a rotating absorber that absorbs and stores foreign matter, and a discharge roller 103 that is pressed against the absorption storage roller 102 and discharges liquid foreign matter from the absorption storage roller 102. Yes.

  The absorption storage roller 102 is made of a porous body having open cells, such as polyurethane foam, and a shaft 102a rotatably supported on the housing 101, and an absorption storage provided around the shaft 102a. Part 102b.

  The absorption storage roller 102 is disposed on the upper surface and both side surfaces of the track rail 1 in the same manner as the rotation roller 73 shown in FIG. And the absorption storage part 102b of each absorption storage roller 102 is formed so that it may enter into the said rolling surfaces 11a and 11b, as shown in FIG. 5, ie, the said absorption storage part 102b is the surface of the said track rail 1. It is designed to come into sliding contact with no gap. For this reason, it is possible to reliably absorb the liquid foreign matter adhering to the surface of the track rail 1.

  On the other hand, the discharge roller 103 is pivotally supported by the housing 101 and has a substantially cylindrical shape. Further, the discharge roller 103 is made of a material having a higher hardness than the absorption storage roller 102 and is a member that is not easily deformed. Therefore, the discharge roller 103 can crush the absorption storage roller 102, and thus the liquid foreign matter absorbed by the absorption storage roller 102 can be discharged.

  In the absorbent member 100 configured as described above, when the moving block 2 moves in the direction of the arrow A, the absorption storage roller 102 slidably contacting the surface of the track rail 1 without a gap rotates in the direction of the arrow B, The liquid foreign matter adhering to the surface of the track rail 1 is absorbed. On the other hand, the discharge roller 103 is pressed against the absorption storage roller 102 that has absorbed the liquid foreign matter, and the liquid foreign matter is discharged from the absorption storage roller 102. The discharged liquid foreign matter is discharged to the outside of the absorbing member 100 by an unillustrated discharge gutter.

  FIG. 9 is a schematic view showing a sixth embodiment of the absorbing member. The absorbent member 200 of the present embodiment is a modification of the fifth embodiment, and the housing 101, the absorption storage roller 102, and the discharge roller 103 have the same configuration. For this reason, about these housing 101, the absorption storage roller 102, and the discharge roller 103, the same code | symbol is attached | subjected and the description is abbreviate | omitted. On the other hand, there is a difference between the absorbent member 200 of the present embodiment and the absorbent member 100 with respect to the following configuration.

  The absorbent member 200 of the present embodiment includes a scraper 201 that scrapes off the surface layer of the absorption storage roller 102, a roller piece tank 202 that stores the absorption roller piece 204 scraped off by the scraper 201, and the absorption storage roller 102. And a spring member 203 that urges toward the surface of the track rail 1.

  The scraper 201 is fixed in the housing 101. One end of the scraper 201 is provided with a spire-shaped blade, and the surface of the absorption storage roller 102 is scraped off by pressing the blade against the outer peripheral surface of the absorption storage roller 102. . This blade portion is formed so as to follow the outer diameter shape of the absorption storage roller 102.

  Similar to the scraper 201, the roller piece tank 202 is fixed in the housing 101. The roller piece tank 202 is formed as a box that is opened toward the scraper 201 so that the roller piece 204 scraped off by the scraper 201 can be stored. On the other hand, the spring member 203 is fixed to the inner surface of the housing 101 facing the surface of the track rail 1, and biases the absorption storage roller 102 toward the surface of the track rail 1.

  In the absorbing member 200, when the moving block 2 moves along the track rail 1 in the direction of the arrow A, the absorption storage roller 102 slidably contacting the surface of the track rail 1 without a gap rotates in the direction of the arrow B, The liquid foreign matter adhering to the surface of the track rail 1 is absorbed. Thereafter, the surface layer of the absorption storage roller 102 that has absorbed the liquid foreign matter is scraped off by the scraper 201, and the roller piece 204 scraped off by the scraper 201 is stored in the roller piece tank 202.

  As described above, in the absorbent member 200 of the present embodiment, the surface layer of the absorbent storage roller 102 in which the liquid foreign matter has been absorbed is scraped off by the scraper 201, so that the absorbent storage roller 102 is used by using the absorbent member 200 over time. Will gradually decrease in diameter. With this configuration, there is a possibility that the absorption storage roller 102 may not come into sliding contact with the surface of the track rail 1 without a gap. Therefore, the absorbing member 100 is provided with the spring member 203 so that the surface of the track rail 1 and the outer peripheral surface of the absorption storage roller 102 are always in sliding contact.

  According to the absorbing member 200 having such a configuration, as in the fifth embodiment, the liquid foreign matter is absorbed and discharged, and the surface layer surface of the absorption storage roller 102 in which the liquid foreign matter is absorbed is the scraper 201. Therefore, the surface of the absorption storage roller 102 that does not always absorb the liquid foreign matter comes into sliding contact with the surface of the track rail 1. Therefore, liquid foreign matter is not excessively absorbed by the absorption storage roller 102, and clogging due to liquid foreign matter can be prevented. As a result, the moving block 2 can be moved smoothly.

  In the second embodiment to the sixth embodiment of the absorber, the rotation absorber is configured to rotate while sliding on the surface of the track rail 1 as the moving block 2 moves. A speed reduction means such as a gear may be provided for the absorber so that the peripheral speed of the rotary absorber is different from the moving speed of the moving block 2.

  Since the absorbing member of each embodiment configured as described above is arranged outside the seal member in the linear guide device, when the moving block moves along the track rail, the absorbing member moves to the moving block. Prior to the movement of the liquid, the foreign liquid adhering to the surface of the track rail is absorbed.

  Therefore, the liquid foreign matter adhering to the surface of the track rail is absorbed by the absorbing member without reaching the seal lip portion of the sealing member. For this reason, it is possible to prevent the liquid foreign matter from entering the inside of the moving block via the track rail, so that the ball or the ball caused by the outflow of the lubricating oil adhering to the surface of the ball or rolling surface It is possible to reduce early wear on the rolling surface.

  In the above description, the absorbing member of the present invention is applied to a linear guide device. However, the absorbing member of the present invention can also be applied to a ball spline device, a ball screw device, and the like.

  In the linear guide device shown in FIG. 1, the lubricating oil supply member 4 is provided between the moving block 2 and the seal member 5. However, the lubricating oil supply member 4 may be omitted.

  DESCRIPTION OF SYMBOLS 1 ... Track rail (guide shaft), 11 ... Rolling surface, 2 ... Moving block (moving member), 3 ... Ball (rolling element), 4 ... Lubricating oil supply member, 5 ... Seal member, 6 ... Absorbing member

Claims (4)

A plurality of rolling elements, a guide shaft in which a rolling surface of the rolling element is formed along the longitudinal direction, and an infinite circulation path of the rolling element is assembled to the guide shaft via the plurality of rolling elements. A moving member provided, a pair of sealing members having sealing lip portions attached to both front and rear ends in the moving direction of the moving member and closely contacting the guide shaft, and disposed on the outside of the seal member and moved. A primary absorber that absorbs liquid adhering to the surface of the guide shaft as the member moves ,
The primary absorber is a belt-like member that rotates around a plurality of rotating support shafts and sucks liquid from the surface of the guide shaft while rolling on the surface of the guide shaft. A motion guide device characterized by the above. The motion guide apparatus according to claim 1, wherein a peripheral speed of the primary absorber is set at a speed different from a moving speed of the moving member. The motion guide apparatus according to claim 1, wherein the primary absorber is provided with a discharging unit that discharges the liquid held in the absorber. The motion guide apparatus according to claim 1, further comprising a secondary absorber that sucks and stores the liquid held by the primary absorber without contacting the guide shaft.

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