JP3925186B2 - Dust cover for linear motion device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dustproof cover for a linear motion device, and more particularly to a dustproof cover for a linear motion device for preventing foreign matter from adhering to the linear motion device.
[0002]
[Prior art]
Linear motion devices such as linear guides are incorporated in various machine tools, robot devices, and the like, and are often used to guide the movement of a moving object.
[0003]
This type of linear motion device includes a guide body and a sliding body that moves the guide body along the longitudinal direction. A large number of balls or rollers as rolling elements are inserted between the guiding body and the sliding body, and the rolling body is light along the longitudinal direction of the guiding body by the rolling of the rolling body, and the accuracy is high. It can slide well.
[0004]
In such a linear motion device, dust prevention with respect to the guide body exposed to the outside becomes an important problem. If foreign matter adheres to the guide body, the foreign matter may enter the inside of the sliding body, and smooth rolling of the rolling element may be hindered, making it impossible to maintain high-precision sliding.
[0005]
  As a technique for preventing such foreign matter from adhering to the guide body, FIG. 14 to FIG.17A method as shown in FIG. 14 to FIG.17In FIG. 2, the guide rail which is a guide body is not shown because it is covered with a dustproof cover.
[0006]
FIG. 14 shows that belt take-up machines 31 are provided at both ends of the linear guide 10 in the longitudinal direction, a dust-proof belt 30 is provided between the belt take-up machines 31, and the exposed portion of the guide rail is exposed to the dust-proof belt. The structure covered with 30 is shown (hereinafter referred to as a belt winding structure). In this belt winding structure, the belt winder 31 provided on the side closer to the slider 12 is wound around the dust-proof belt 30 in accordance with the sliding operation of the slider 12 which is the sliding body of the linear guide 10. The belt winder 31 provided on the side where the slider 12 moves away releases the dustproof belt 30.
[0007]
FIG. 15 shows a structure for preventing foreign matter from adhering to the guide rail by covering the exposed portion of the linear guide 10 to the outside of the guide rail with a dustproof brush 40 (hereinafter referred to as a brush structure). In this brush structure, the dustproof brush 40 is supported by the main body of the linear guide 10 via the mounting frame 41, the slider 12 slides away from the dustproof brush 40, and the dustproof brush 40 passes after the slider 12 passes. Due to its rigidity, the slider 12 is restored to the state before passing.
[0008]
FIG. 16 shows a structure for preventing foreign matter from adhering to the linear guide 10 by covering a portion exposed to the outside of the guide rail with a dustproof cloth curtain 50 having a slit (referred to as a curtain structure). . In this curtain structure, the dustproof cloth curtain 50 is supported by the main body of the linear guide 10 via the mounting frame 41, the slider 12 slides away from the dustproof curtain 50, and after the slider 12 passes, the dustproof brush 40 is restored to the state before the slider 12 passes due to its rigidity.
[0009]
FIG. 17 shows that the gate-shaped cross-sectional shape gradually decreases from the end of the guide rail toward the slider 12, and the nested portal-type cover 60 that can overlap is separated from the slider 12 in the longitudinal direction of the guide rail. A structure is shown in which foreign substances are prevented from adhering to the guide rail by being provided at the exposed portion of the left and right guide rails to the outside (hereinafter referred to as a nested structure). In this nesting structure, the gate-type cover 60 provided on the side where the slider 12 approaches is accommodated in the vicinity of one end of the guide rail so as to slide, and the slider 12 moves away. The gate-type cover 60 provided on the side is pulled out from the state of being overlapped and housed in the vicinity of the other end as the slider 12 slides.
[0010]
Further, in JP 2000-343374 A, an exposed portion of the guide rail to the outside is covered with a dust-proof cover of a sewing bellows structure that has heat resistance against high-temperature foreign matter scattered, for example, during welding. There is disclosed a structure that prevents foreign matter from adhering to the linear motion device without causing deformation or damage even if the sputter adheres to the bellows type dustproof cover (hereinafter referred to as a bellows structure).
[0011]
[Problems to be solved by the invention]
However, the conventional techniques described above have the following problems.
[0012]
First, in the belt winding structure shown in FIG. 14, since the belt winding machine 31 has a mainspring structure, there is a problem in durability. In addition, the dustproof belt 30 may sag or loosen, and foreign matter may enter from the location where the sag or loosening occurs, causing the foreign matter to adhere to the guide rail. Furthermore, when remodeling is performed to extend the linear guide 10, it is necessary to disassemble the belt winder 31 and extend the dustproof belt 30, which requires cost and time for remodeling.
[0013]
In the brush structure shown in FIG. 15, the dustproof brush 40 that has repeatedly contacted the slider 12 may come off from the mounting frame 41, and the dustproof brush 40 itself may become a foreign matter adhering to the guide rail. Further, there is a problem of wear resistance in contact of the dustproof brush 40 with the slider 12. Furthermore, the contact of the dust-proof brush 40 with the slider 12 becomes resistance when the slider 12 slides, and in the linear guide 10 used in the welding process, the dust-proof brush 40 may be welded due to spatter scattered during welding. .
[0014]
In the curtain structure shown in FIG. 16, the contact of the dust-proof cloth curtain 50 with the slider 12 becomes a resistance when the slider 12 slides, and there is also a problem in the wear resistance of the dust-proof cloth curtain 50 itself. Furthermore, since the upper part of the dust-proof cloth curtain 50 is provided with a slit, the upper part of the dust-proof cloth curtain 50 may hang down, and the suspended part is wound between the slider 12 of the linear guide 10 and the guide rail. there is a possibility.
[0015]
In the nested structure shown in FIG. 17, there is a problem that a storage space for the portal cover 60 is required at both ends in the longitudinal direction of the linear guide 10 because of the structure. Further, when the slider 12 slides at a high speed, the portal cover 60 is liable to fail, and there is a problem in reliability. Further, lubrication of the portal cover 60 is required to make the overlapping smooth. There are also maintenance issues. Further, when the extension of the linear motion device is remodeled, it is necessary to add the portal cover 60, which requires time and cost, and the storage space for the portal cover 60 at both ends of the linear motion device is large. Remodeling is also required.
[0016]
In the bellows structure, similarly to the above-described nesting structure, when the slider slides to the end portion of the guide rail, the bellows type dustproof cover overlaps the end portion, so that storage spaces are required at both end portions. Further, it takes time to sew the bellows type dustproof cover, which requires high cost, and there is a possibility that the sewing thread deteriorates due to repeated sliding of the slider, and the dustproof cover is damaged. Further, the bellows-type dustproof cover may come into contact with the upper surface of the guide rail depending on the weight of the bellows-type dustproof cover, and the bellows-type dustproof cover may be damaged due to friction generated there.
[0017]
In addition, in remodeling to extend the linear motion device equipped with the dustproof cover of the bellows structure, it is necessary to add a bellows type dustproof cover by sewing or bonding, and in the place where the linear motion device is installed, the modification In order to do this, time and cost are required, and the storage space for the portal cover 60 at both ends of the linear motion device needs to be modified.
[0018]
Further, even when a part of the bellows type dustproof cover is damaged, it is difficult to repair only the damaged part from the viewpoint of time and cost, and the bellows type dustproof cover needs to be replaced at once.
[0019]
The present invention has been made in view of such problems of the prior art, and relates to a dust-proof cover for a linear motion device, and in particular, maintains an appropriate function with respect to repeated sliding motions of a slider, spattering, etc. An object of the present invention is to provide a cover for a linear motion device that has excellent heat resistance against high-temperature foreign matter and can be easily modified and repaired.
[0020]
[Means for Solving the Problems]
  (1) In order to achieve the above object, according to the present invention, there is provided a dustproof cover having a plurality of covers that can be tilted with respect to the sliding direction of the sliding body of the linear motion device, wherein the cover is tilted. A first side that contacts the sliding body that moves in one sliding direction, a second side that contacts the sliding body that moves in the other sliding direction, the cover, and the Restoring means for restoring the cover to the original state when the sliding body is in a non-contact state.The fulcrum of the cover is provided at a position where it comes into contact with another tilted cover and stops tilting of the other cover.A dust cover is provided.
[0021]
  A first side that can be tilted about a fulcrum and that is in contact with the sliding body that moves in one sliding direction, a second side that is in contact with the sliding body that moves in the other sliding direction, and the original state When a dust-proof cover is constituted by a plurality of covers having restoring means for restoring them, and a force acts on the cover in the sliding direction of the sliding body of the linear motion device, the cover tilts around the fulcrum. When the sliding body force in the sliding direction is released, the cover is restored to its original state, so that the sliding movement of the sliding body is avoided so as not to interfere with the sliding movement. And it becomes possible to reduce the area | region of the exposed part to the exterior of the guide body of a linear motion apparatus.
  In addition, it is possible to prevent the cover from tilting excessively by providing a cover fulcrum at a position where it comes into contact with the fulcrum of the other cover when it is tilted and stops tilting the other cover. It becomes.
[0022]
(2) In the above invention, although not particularly limited, the sliding direction of the sliding body is such that the plurality of covers overlap each other in the sliding direction of the sliding body with the ends of the adjacent covers. It is preferable that they are arranged in a plurality of rows along.
[0023]
A plurality of rows along the sliding direction of the sliding body of the linear motion device such that the plurality of covers overlap each other in the sliding direction of the sliding body of the linear motion device with the ends of the adjacent covers. As a result, the plurality of covers can be tilted without causing interference between the covers, and the area exposed to the outside of the guide body of the linear motion device can be further reduced.
[0024]
(3) In the above invention, although not particularly limited, it is preferable that the restoring means is a weight provided at a position vertically downward with respect to the fulcrum of the cover in a non-contact state of the sliding body.
[0025]
As a restoring means, by providing a weight vertically downward with respect to the fulcrum of the cover in the non-contact state of the sliding body, the tilted cover can be restored to the original state after passing through the sliding body by the action of the weight. In addition, the restoration means can have a simple structure.
[0030]
  (4In the above invention, although not particularly limited, it is preferable that the cover is a thin metal plate.
[0031]
By forming the cover with a thin metal plate such as aluminum or iron, an appropriate rigidity can be secured, and a smooth surface of the cover can be obtained in order to smooth the tilting of the cover.
[0032]
  (5In the above invention, although not particularly limited, it is preferable that a cover group having one or more of the covers is detachable from the linear motion device.
[0033]
A dustproof cover is constituted by a cover group having one or two or more covers as a unit, and the cover can be attached to and detached from the linear motion device, thereby facilitating modification and repair.
[0034]
  (6In the above invention, although not particularly limited,When the cover is tilted in one sliding direction, the first side is parallel to the lower end surface of the sliding body, and when the cover is tilted in the other sliding direction, the second side is Parallel to the lower end of the moving objectIt is preferable.
[0035]
  In one directionThe cover is tiltedIfThe first side isLower end surface of sliding bodyParallel toIn the other directionThe cover is tiltedIfThe second sideThe lower end surface of the sliding bodyIn parallelBy this, it becomes possible to further reduce the area of the exposed portion of the linear motion device to the outside when the sliding body passes.
[0036]
  (7In order to achieve the above object, according to the present invention, there is provided a linear motion device having a guide body and a slide body movable along the longitudinal direction of the guide body.6A linear motion device including the dustproof cover according to any one of the above is provided.
[0037]
  From claim 16By providing the linear motion device with the dustproof cover described in any of the above, it becomes possible to reduce the area of the exposed portion to the outside of the linear motion device, and prevent foreign matter from adhering to the guide body of the linear motion device. It becomes possible to do.
[0038]
【The invention's effect】
According to the first aspect of the present invention, the cover follows the movement of the sliding body, tilts around the fulcrum, and after the sliding body passes, the restoring body restores the cover to the original state. This sliding operation can be avoided so as not to hinder the sliding operation of the sliding body, and the area of the exposed portion to the outside of the guide body of the linear motion device can be reduced.
[0039]
In addition, since the cover can be tilted around the fulcrum, the resistance of the dustproof cover acting on the sliding body when contacting the sliding body is reduced compared to the brush structure and dustproof cloth curtain structure described above, Wear of the dustproof cover due to contact is reduced, and it is possible to maintain an appropriate function for repeated sliding operations of the sliding body.
[0040]
  Furthermore, for example, compared to the above-described belt winding structure and nested structure, the cover is a relatively simple structure that is supported by a fulcrum, so that the frequency of occurrence of failure is reduced and the reliability is increased. Further, it is not necessary to provide a storage space in the linear motion device as compared with the nested structure or the bellows structure, and further, it is not necessary to supply oil to the dustproof cover as compared with the above-described nested structure.Further, by using the cover fulcrum as a stopper for stopping the tilting of the other cover, it is possible to prevent a failure due to the excessive tilting of the cover accompanying the high-speed movement of the sliding body.
[0041]
According to the invention of claim 2, it is possible to further reduce the area of the exposed portion of the linear motion device to the outside without causing interference between the tilting covers.
[0042]
According to the invention of claim 3, by providing a weight as the restoring means, it is possible to perform the restoring means with a simple structure, so compared with the above-described belt winding structure and bellows structure, The occurrence frequency of failures is reduced, and low costs can be realized. Furthermore, a weight as one restoring means is provided for one cover, and can be tilted independently of the other covers, so that it is easy to check the linear motion device inside the dustproof cover, Maintainability is improved.
[0045]
  Claim4According to the described invention, a smooth surface of the cover for smooth tilting of the cover can be obtained by forming the cover with a thin metal plate such as aluminum or iron. Furthermore, the cover can be secured with appropriate rigidity, and there is no problem of hanging down due to the weight of the dustproof cover itself as compared with the belt winding structure, curtain structure, and bellows structure described above. There is no problem of wear due to contact or entrainment of the guide body. Furthermore, by applying a coating on the surface of the metal thin plate to prevent the welding of high-temperature foreign matter such as spatter generated during welding, it becomes possible to solve the welding problem as in the brush structure described above. It becomes possible to obtain a dustproof cover having excellent heat resistance.
[0046]
  Claim5According to the described invention, at the time of remodeling to extend the length of the linear motion device, by attaching a cover group for the extended length to the linear motion device, it is compared with the belt winding structure and the bellows structure described above. Thus, it is easy to modify the extension of the dust cover with the extension of the linear motion device in the longitudinal direction. Even when the linear motion device is shortened, the linear motion device can be easily modified by removing the cover group corresponding to the shortened length. Furthermore, if some of the covers are broken or damaged, the cover group including the broken or repaired cover can be replaced. Repair becomes easy.
[0047]
  Claim6According to the described invention, it is possible to further reduce the area of the exposed portion to the outside of the guide body of the linear motion device when the sliding body passes.
[0048]
  Claim7According to the described invention, it is possible to reduce the area of the exposed portion to the outside of the linear motion device, and it is possible to prevent foreign matter from adhering to the guide body of the linear motion device.
[0049]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0050]
[First Embodiment] FIGS. 1 to 12 show the first embodiment of the present invention. FIG. 1 shows an overall view of a clamp device 130 having a linear guide 10 that is a linear motion device having a side cover 14 in a welding process, and FIG. 2 shows an entire linear guide 10 having a side cover 14. 3 is an exploded perspective view of the linear guide 10 having the side cover 14. 4 shows a partial cross-sectional view of the linear guide 10 provided with the side cover 14, and FIG. 5 shows the slider 12 of the linear guide 10 when the slider 12, which is a sliding body of the linear guide 10, slides. FIG. 6 is a plan view of the side cover 14 portion in the case of FIG. 5. FIG. 7 shows a side view when a spiral spring is used as the restoring means.
[0051]
As shown in FIG. 1, in the first embodiment of the present invention, for example, the side cover 14 is attached to the clamp device 130 that fixes the workpiece 120 in order to ensure the assembly accuracy in the welding process of the automobile body by the welding robot 100. The linear guide 10 provided with is used. The clamp device 130 includes two actuators 133a and 133b for fixing the workpiece 120, six linear guides 10a to 10f provided with a side cover 14, and a slider 12 provided in the linear guides 10a to 10f. It comprises six actuators 132a to 132f for sliding and a base portion 131 for supporting them.
[0052]
The first actuator 133a is means for fixing the workpiece 120 by driving the first workpiece fixing portion 134a supported at the tip thereof, and is provided on the first actuator support member 135a.
[0053]
Similarly, the second actuator 133b is a means for fixing the work 120 by driving the first work fixing part 134b supported at the tip thereof, and is provided on the second actuator support member 135b. It has been. FIG. 1 shows two workpiece fixing portions 134a and 134b and two actuators 133a and 133b for fixing the workpiece 120. One or more workpiece fixing portions and a number of actuators and linear guides corresponding to the number of the workpiece fixing portions are provided.
[0054]
The first Z-axis direction linear guide 10a is a means for sliding the first workpiece fixing portion 134a and the first actuator 133a in the Z-axis direction, and is on the slider 12 of the first Z-axis direction linear guide 10a. In addition, a first work fixing portion 134a and a first actuator 133a are attached via a first actuator support member 135a, and a first Z-axis direction actuator 132a is used as a driving means for sliding. Is provided.
[0055]
Similarly, the second Z-axis direction linear guide 10b is a means for sliding the second workpiece fixing portion 134b and the second actuator 133b in the Z-axis direction, and the slider of the second Z-axis direction linear guide 10b. 12, a second work fixing part 134b and a second actuator 133b are attached via a second actuator support member 135b, and the second Z-axis direction is used as a driving means for sliding the second work fixing part 134b and the second actuator 133b. An actuator 132b is provided.
[0056]
The first Y-axis direction linear guide 10c is a means for sliding the first Z-axis direction linear guide 10a in the Y-axis direction. The first Y-axis direction linear guide 10c is arranged on the slider 12 of the first Y-axis direction linear guide 10c. One end of the Z-axis direction linear guide 10a is attached. As a result, the first work fixing part 134a and the first actuator 133a attached to the first Z-axis direction linear guide 10a can be slid in the Y-axis direction. As a driving means for sliding, the first Y-axis direction linear guide 10c is provided with a first Y-axis direction actuator 132c.
[0057]
Similarly, the second Y-axis direction linear guide 10d is means for sliding the second Z-axis direction linear guide 10b in the Y-axis direction. On the slider 12 of the second Y-axis direction linear guide 10d, One end of the second Z-axis direction linear guide 10b is attached. As a result, the second workpiece fixing portion 134b and the second actuator 133b attached to the second Z-axis direction linear guide 10b can be slid in the Y-axis direction. As a driving means for sliding, the second Y-axis direction linear guide 10d is provided with a second Y-axis direction actuator 132d.
[0058]
The first X-axis direction linear guide 10e is a means for sliding the first Y-axis direction linear guide 10c in the X-axis direction. The first X-axis direction linear guide 10e is arranged on the slider 12 of the first X-axis direction linear guide 10e. The bottom part of the Y-axis direction linear guide 10c is attached. Accordingly, the first Z-axis direction linear guide 10a attached to the first Y-axis direction linear guide 10c, the first work fixing portion 134a attached to the first Z-axis direction linear guide 10a, and the first 1 actuator 133a can be slid in the X-axis direction. As a driving means for sliding, the first X-axis direction linear guide 10e is provided with a first X-axis direction actuator 132e.
[0059]
Similarly, the second X-axis direction linear guide 10f is a means for sliding the second Y-axis direction linear guide 10d in the X-axis direction, and the second X-axis direction linear guide 10f is placed on the slider 12 of the second X-axis direction linear guide 10f. The bottom part of the Y-axis direction linear guide 10d is attached. Accordingly, the second Z-axis direction linear guide 10b attached to the second Y-axis direction linear guide 10d, the second workpiece fixing portion 134b attached to the second Z-axis direction linear guide 10b, and It becomes possible to slide the second actuator 133b in the X-axis direction. As a driving means for sliding, the second X-axis direction linear guide 10f is provided with a second X-axis direction actuator 132f.
[0060]
The first X-axis direction linear guide 10e and the second X-axis direction linear guide 10f are respectively installed at both end portions of the base portion 131, and the first work fixing portion 134a positioned at the respective tips. The second workpiece fixing part 134b is installed in such a direction as to face each other.
[0061]
The workpiece fixing portions 134a and 134b can be moved in the X, Y, and Z axis directions by the linear guides 10a to 10f provided in the clamping device 130, and the workpiece 120 can be fixed at an appropriate position. It becomes. The welding robot 100 moves the welding gun 110 as an end effector to a predetermined welding location on the workpiece 120 with respect to the workpiece 120 appropriately fixed in this manner, and is attached to the tip of the welding gun 120. Welding is carried out by sandwiching the welding location of the workpiece 120 with a welding tip, pressurizing it, and applying a welding current.
[0062]
Below, the detailed structure of the linear guide provided with the side cover 14 is demonstrated based on FIG.2, FIG.3, FIG.4.
[0063]
  As shown in FIGS. 2 and 3, the linear guide 10 includes a guide rail 11 and a slider 12, and a dust cover for preventing foreign matter from adhering to the guide rail 11 of the linear guide 10 has a side surface. Cover group 13 and top cover18And end cover19And the lower side surface cover 20.
[0064]
  The guide rail 11 is a guide body for guiding the sliding operation of the slider 12 which is a sliding body, and the sliding portion of the slider 12 extends along the longitudinal direction of the guide rail 11.12aA rolling element guide groove 11a for rolling rolling elements (not shown) such as balls and rollers provided inside is formed. The guide rail 11 is supported by the guide rail support member 22, and withstands the weight of the sliding body and stably supports the sliding body, as shown in FIG. Is provided. Note that the number of the guide rails 11 may be one or three or more guide rails 11 and is determined by the weight of the slidable body and the size of the slidable body.
[0065]
As shown in FIG. 4, the slider 12 includes a sliding portion 12 a and a sliding member support member 12 c. The sliding portion 12a is formed with rolling element guide grooves (not shown) so as to face the rolling element guide grooves 11a formed on the guide rail 11, and in these rolling element guide grooves, the rolling elements (not shown) are formed. (Shown) is inserted so as to be freely rollable.
[0066]
These rolling elements roll when the slider 12 slides on the guide rail 11 along its longitudinal direction, and circulate in a circulation path provided inside the sliding portion 12a of the slider 12, The sliding part 12a of the slider 12 is light and accurately slidable along the guide rail 11 in the direction indicated by the arrow in FIG.
[0067]
In order to maintain the proper function of the rolling element circulating inside the sliding part 12a, the oil supply part 12b provided on the side part of the sliding part 12a as shown in FIG. It is necessary to refuel regularly. In the present invention, since one side cover 14 can be tilted independently of the other side cover 14, only the side cover 14 where the oil supply portion 12b is located is tilted when refueling. By doing so, it becomes possible to supply oil easily.
[0068]
As shown in FIG. 3, the side cover group 13 includes five side covers 14, a side cover support member 15, and a hinge bolt 16.
[0069]
The side cover 14 includes a first side 29a located on the side opposite to the one sliding direction for contacting the slider 12 moving in one sliding direction, and a slider moving in the other sliding direction. 12 to have a second side 29b located on the side opposite to the other sliding direction for contacting the other, and to cover the region of the linear guide 10 exposed to the outside of the guide rail 11. It is means of.
[0070]
As shown in FIG. 4, the side cover 14 is supported by the side cover support member 15 by a hinge bolt 16 at a fulcrum that is the center of tilting, and can be tilted independently of the other side covers 14. When the slider 12 moving in one sliding direction comes into contact with the first side 29a of the side cover 14, the slider 12 tilts in the one sliding direction around the hinge bolt 16 and moves in the other sliding direction. When the moving slider 12 comes into contact with the second side 29 b of the side cover 14, the slider 12 tilts in the other sliding direction around the hinge bolt 16. Note that the shape of the side cover 14 may be a shape having a first side 29a and a second side 29b for contacting the slider 12, and may be a rectangle, a rhombus, or the like.
[0071]
Further, the width of the side cover 14 is slightly larger than the pitch P described later, and when the side cover 14 is attached to the linear guide 10 as shown in FIG. When not passing, both end portions of the side cover 14 overlap each other. Thereby, it is possible to reduce the area of the exposed portion of the guide rail 11 to the outside.
[0072]
The side cover 14 is made of a thin metal plate such as aluminum or iron, and the surface of the thin plate is coated with a coating for preventing high temperature foreign matter such as spatter generated during welding.
[0073]
As described above, by allowing the side cover 14 to tilt around the hinge bolt 16, the resistance of the side cover 14 acting on the slider 12 when contacting the slider 12 is reduced, and the side cover 14 is worn by contact. Thus, it is possible to maintain an appropriate function for the repeated sliding operation of the slider 12.
[0074]
Further, as shown in FIG. 4, a weight 17 that is a restoring means having a thickness that does not interfere with the other side cover 14 is provided at the lower end portion of the fulcrum of the side cover 14 that is vertically downward when the sliding body 12 is not in contact. Is provided. By the action of the weight 17, when the slider 12 is not passing, the side cover 14 is in a state in which the weight 17 is positioned vertically downward of the fulcrum that is the center of tilting of the side cover 14, that is, in the vertical direction. After the slider 12 passes, the weight 17 is tilted so that the lower end of the tilted side cover 14 is vertically downward of the fulcrum of the side cover 14 due to the action of gravity acting on the weight 17. The state is restored, that is, the state before the passage of the slider 12 is restored.
[0075]
The weight 17 is preferably attached at a position away from the hinge bolt 16 that is the center of tilting in order to ensure a sufficient rotational moment when the side cover 14 is restored, and the weight of the weight 17 increases as the distance increases. Is less. Further, by changing the attachment position of the weight 17 to the side cover 14, not only when the weight 17 is installed on a horizontal plane, but also, for example, as in the Y-axis linear guides 10c and 10d described above, the sliding body is moved vertically. It is also possible to employ the linear guide 10 for sliding.
[0076]
As shown in FIG. 7, as a restoring means instead of the weight 17, a spiral spring 23 is provided in the vicinity of a fulcrum that is the center of inclination of the side cover 14, and one end of the spiral spring 23 and the side cover 14 are connected to each other. The other end of the spiral spring 23 is fixed to a bolt or a pin provided at the fulcrum of the side cover 14, and the side cover 14 tilted by the elastic force of the spiral spring 23 is restored to an upright state in the vertical direction. It is also possible. Accordingly, it is possible to prevent the side cover 14 from being excessively tilted without bringing the side cover 14 into contact with the hinge bolt 16 at the fulcrum of the other side cover 14. Furthermore, it is possible to quickly restore after passing through the slider 12, shorten the exposure time of the linear guide 10 to the outside of the guide rail 12, and prevent foreign matter from adhering.
[0077]
The plurality of side covers 14 constituting the side cover group 13 are attached such that the distance between the fulcrums that are the centers of tilting of the adjacent side covers 14 is the pitch P. Further, as shown in FIGS. 4 and 6, in order to avoid the adjacent side covers 14 from interfering with each other in the tilting, a row of four side covers is arranged on the side surface portion of the linear guide 10 from the outside to the inside. 25a to 25d are provided, and the side cover 14 located in the first row 25a and the second row 25b is provided with the hinge bolt 16 on the outer side cover support member 15a located outside the linear guide 10. Is supported through. On the other hand, the side covers 14 positioned in the third row 25 c and the fourth row 25 d are supported by hinge side bolts 16 on the inner side cover support member 15 b positioned on the inner side with respect to the linear guide 10.
[0078]
And the side cover 14 supported by the position of the 1st row | line | column 25a and the 2nd row | line 25b of the outer side surface cover support member 15a is twice the above-mentioned pitch P between the fulcrum of the adjacent side surface cover 14. FIG. The first row 25a and the second row 25b are alternately supported via the hinge bolt 16 so that the distance 2P is obtained. Similarly, the side cover 14 supported at the position of the third row 25c and the fourth row 25d of the inner side cover support member 15b is hinged so that the distance between the fulcrums of the adjacent side covers 14 is 2P. The third row 25c and the fourth row 25d are alternately supported via bolts 16.
[0079]
Further, the outer side surface support member 15a that supports the side covers 14 of the first row 25a and the second row 25b, and the inner side surface that supports the side covers 14 of the third row 25c and the fourth row 25d. The side cover support members 15 are configured by attaching the cover support members 15b so as to alternate portions where the side cover 14 is not supported.
[0080]
For example, in FIG. 6, the lowermost row in the figure shows the side cover 14 of the first row 25 a supported on the outermost side with respect to the linear guide 10, and the uppermost row is with respect to the linear guide 10. The side cover 14 of the fourth row 25d supported on the innermost side is shown. The outer side surface cover support member 15a alternately supports the side surface covers 14 at the positions of the first row 25a and the second row 25b at every fixed distance 2P. Further, the side cover 14 is supported on the inner side cover support member 15b alternately at the positions of the third row 25c and the fourth row 25d at every fixed distance 2P.
[0081]
The outer side cover support member 15a and the inner side cover support member 15b are offset by a pitch P so as to compensate for the position where the side cover 14 is not supported, that is, the position where the side cover 14 is not supported. The side cover support member 15 is configured by being coupled. As a result, in FIG. 6, the fourth row 25d, the first row 25a, the third row 25c, and the second row 25b are arranged from the left side in the figure at a certain pitch P to the side cover support member 15. The side cover 14 is repeatedly supported in order.
[0082]
Note that the arrangement is not limited to the above arrangement, and any arrangement may be used as long as the side covers 14 do not interfere with each other. For example, the fourth row 25d, the second row 25b, the third row 25c, the first row Or the third column 25c, the second column 25b, the fourth column 25d, the first column 25a, or the third column 25c, the first column 25a. , The order of the fourth column 25d and the second column 25b may be repeated. The repetition may be started from any of the rows 25a to 25d, and the number of rows of the side cover 14 can be arbitrarily selected.
[0083]
As described above, both end portions of the side cover 14 in the sliding direction of the slider 12 are overlapped with the end portions of the other adjacent side cover 14, and the side cover 14 is moved from the first row 25a by the side cover support member 15. By alternately arranging the four rows 25d, it is possible to prevent interference between the side covers 14 tilting when the slider 12 passes, and to reduce the area of the exposed portion of the linear guide 10 to the outside of the guide rail 11. It becomes possible.
[0084]
The side cover group 13 including the plurality of side covers 14 arranged in this manner is attached to mounting holes provided in the side surface portion of the guide rail support member 22 by hinge bolts 16, and is attached to both side surface portions of the linear guide 10. Provided.
[0085]
As described above, a plurality of side covers 14 are grouped as a side cover group 13, and the side cover group 13 can be attached to and detached from the linear guide 10 independently of the other side cover groups 13. The linear guide 10 can be easily modified and repaired. For example, when remodeling to extend the length of the linear guide 10, by attaching the side cover group 13 for the length of the extension to the linear guide 10, it is easy to remodel the extension of the dustproof cover. Further, when the length of the linear guide 10 is shortened, the dust cover can be shortened easily by removing the side cover group 13 corresponding to the shortened length from the linear guide 10. Furthermore, when some of the side covers 14 break down or are damaged, only the side cover group 13 including the side cover 14 to be repaired can be repaired or replaced. Become. The number of side covers 14 constituting the side cover group 13 may be one to four, or six or more, and the number of units can be arbitrarily selected. The number of the side cover groups 13 covering the side surfaces of the linear guide 10 is the width of the side covers 14 and the number of the side covers 14 constituting each side cover group 13, the length of the linear guide 10 in the longitudinal direction, and the like. It is possible to select arbitrarily from.
[0086]
The upper cover 18 is a means for preventing foreign matter from adhering to the guide rail 11 of the linear guide 10 from above, and is fixed to the end covers 19 attached to both ends in the longitudinal direction of the linear guide 10 with bolts 21. Has been supported. The width of the upper cover 18 is narrower than the central concave portion of the sliding member supporting member 12c of the slider 12, and after mounting, the concave portion of the sliding member supporting member 12c is in a non-contact state as shown in FIG. Cover.
[0087]
The end cover 19 is a means for preventing foreign matter from adhering to the guide rail 11 from both ends in the longitudinal direction of the linear guide 10. The end cover 19 is fixed to a mounting hole provided in the guide rail support member 25 with a bolt 21. Yes. As shown in FIGS. 2 and 3, the width of the end cover 19 is a width that does not interfere with the tilting operation of the side cover 14 existing on the left and right sides of the end cover 19, or the interference You may process a slit in the part of the edge part cover 19 to perform. This eliminates the need to provide storage spaces for the dustproof covers at both ends of the linear guide 10 that existed in the nested structure and the bellows structure in the prior art.
[0088]
The side lower cover 20 is a means for preventing foreign matter from adhering to the guide rail 11 from the lower side of the side cover 14, and is attached to the lower part of the side surface of the linear guide 10. As described above, the side cover 14 can be tilted, and a space is required to prevent interference with the surroundings with the tilt. The side lower cover 20 is a means required to cover a space for allowing the side cover 14 to tilt.
[0089]
As described above, by covering the side surface of the linear guide 10 with the side surface cover group 13 and the side surface lower cover 20 composed of the side surface cover 14, the upper portion thereof is covered with the upper cover 18, and both end portions in the longitudinal direction thereof are covered with the end portion cover 19. It is possible to prevent foreign matter from adhering to the guide rail 11 of the linear guide 10.
[0090]
Next, the operation will be described.
[0091]
Based on FIGS. 5 and 6, the tilting operation of the side cover 14 when the slider 12 slides and the function of stopping the tilting of the other side cover 14 by the hinge bolt 16 supporting the side cover 14 will be described below. Explained.
[0092]
FIG. 5 is a side view showing the tilted state of the side cover 14 of the linear guide 10 when the slider 12 slides in the direction of the arrow in the figure. The side cover 14 indicated by the alternate long and short dash line in FIG. The hidden lines of the side cover 14 supported by the first row 25a and the second row 25b are shown, and the portions of the side cover 14 shown by broken lines are the third row 25c and the fourth row 25d. The hidden lines of the side cover 14 that are supported are shown, and the hidden lines of the hinge bolts 16 that support the side covers 14 of the third row 25c and the fourth row 25d are also shown by broken lines.
[0093]
FIG. 6 is a plan view of a portion of the side cover 14 of the linear guide 10 corresponding to FIG. 5 when viewed from above, and shows the row of side cover 14 positioned on the outermost side with respect to the linear guide 10. The first row 25a, in turn, the second outer side row of side cover 14 is the second row 25b, the third outer side row of side cover 14 is the third row 25c, the fourth outer side The fourth row 25d indicates the row of the side covers 14 located at the innermost position, that is, the innermost side with respect to the linear guide 10. Further, the side cover 14 is indicated by hatching, and the slider 12 on the upper side of the side cover 14 is indicated by a broken line.
[0094]
As shown in FIG. 5, after the slider 12 does not pass or passes, the side cover 14 stands upright in the vertical direction by the action of the weight 17 attached to the lower end of the side cover 14, that is, 5, the angle α formed by the side cover central axis CL with respect to the vertical direction is 0 °. However, when the slider 12 passes, the side cover 14 is moved by the action of the sliding force of the slider 12. , Tilt around the hinge bolt 16 provided at the fulcrum.
[0095]
As the slider 12 slides, first, the apex located in the sliding direction of the lower end surface of the slider 12 in FIG. 5 and the side of the side cover 14 opposite to the sliding direction of the slider 12, that is, the first side. As shown in FIG. 5, the side cover center axis CL tilts in the sliding direction with respect to the vertical direction by the tilt angle α as shown in FIG.
[0096]
Further, as the slide of the slider 12 proceeds, the tilt angle α increases accordingly, and the lower end surface of the slider 12 in FIG. 5 and the upper vertex of the first side 29a of the slider 12 of the side cover 14 come into contact. The tilt angle of the side cover 14 reaches the maximum tilt angle β where the side cover center axis CL in contact with the slider 12 and the side cover 14 is the maximum angle with respect to the vertical direction.
[0097]
When the slider 12 slides at a high speed, the side cover 14 tilts to the maximum tilt angle β or more due to the inertia of the rotational force generated at the time of contact. In such a case, when the side cover 14 comes into contact with the hinge bolt 16 that supports another side cover 14 that is located at a distance of 2P, the tilt is stopped, and an excessive tilt that causes a failure is prevented. The Further, by using the hinge bolt 16 as a stopper for supporting the side cover 14 and tilting the other side cover 14 in this way, it is possible to reduce the number of parts and simplify the structure.
[0098]
When the slider 12 slides in the direction opposite to the arrow in FIG. 5, the apex located in the sliding direction of the lower end surface of the slider 12 in FIG. 5 and the second side 29 b of the side cover 14 come into contact with each other. When the side cover center axis CL is tilted by the tilt angle α in the sliding direction with respect to the vertical direction, the slider 12 is further slid, and the side cover 14 is sufficiently pushed, the vertical of the side cover center axis CL becomes vertical. The angle with respect to the direction reaches the maximum tilt angle β. Furthermore, the excessive tilt when the slider 12 slides at a high speed is stopped by the hinge bolt 16 that supports the other side cover 14 that is located at a distance 2P in the sliding direction. The
[0099]
For example, in the case of the sliding direction of FIG. 6, in the hinge bolt 16 provided on the inner side cover support member 15b, the side cover 14 supported by the fourth hinge bolt 16 from the right side in the drawing is separated by a distance 2P. The tilting is stopped by the fifth hinge bolt 16 from the right side in the figure at the above position. At this time, the fourth hinge bolt 16 from the right side in the drawing provided on the outer side cover support member 15a of FIG. 6 is the fourth and fifth hinge bolts 16 of the inner side cover support member 15b. However, it does not interfere with the tilting operation of the side cover 14 supported by the fourth hinge bolt 16 provided on the inner side cover support member 15b.
[0100]
That is, the side cover 14 supported by the outer side cover support member 15a is a hinge bolt 16 attached to the outer side cover support member 15a, and is a distance from the hinge bolt 16 on which the tilted side cover 14 is supported. The tilt is stopped by another hinge bolt 16 attached at a position 2P away.
[0101]
Similarly, the side cover 14 supported by the inner side cover support member 15b is a hinge bolt 16 attached to the inner side cover 14 and is a distance from the hinge bolt 16 on which the tilted side cover 14 is supported. The tilt is stopped by another hinge bolt 16 attached at a position 2P away.
[0102]
As shown in FIG. 6, the tip of the hinge bolt 16 provided on the outer side cover support member 15a does not reach the side cover 14 of the third row 25c supported by the inner side cover support member 15b. Further, the tip of the hinge bolt 16 provided on the inner side cover support member 15b is configured not to reach the side cover 14 of the second row 25b supported by the outer side cover support member 15a. .
[0103]
Therefore, the side cover 14 supported by the first row 25a and the second row 25b is not stopped from being tilted by the hinge bolt 16 attached to the inner side cover support member 15b, and the third row The side cover 14 supported by the row 25c and the fourth row 25d is not stopped from tilting by the hinge bolt 16 attached to the outer side cover support member 15a.
[0104]
By adopting the structure as described above, it is possible to further reduce the area of the exposed portion of the linear guide 10 to the outside of the guide rail 11 when the slider 12 is not passing and when passing, and the side cover 14 is excessively moved. It is possible to prevent an inadvertent tilting.
[0105]
Next, the tilting operation and restoring operation of the side cover 14 accompanying the sliding operation of the slider 12 will be described below.
[0106]
8, FIG. 9, FIG. 10, FIG. 11 and FIG. 12 explain the tilting operation of the side cover 14 when the slider 12 in the linear guide 10 according to the first embodiment of the present invention slides by the pitch P. For convenience of explanation, the guide rail 11, the side cover support member 15 and the like are not shown in the figure, and here, description will be made by taking five side covers 14a to 14e as an example. Note that the number of the side covers 14 can be arbitrarily determined from the length of the linear guide 10 in the longitudinal direction, the width of the side cover 14, and the like.
[0107]
8, slides in one sliding direction (in the direction of the arrow in FIG. 8, the same in FIGS. 9, 10, 11, and 12) with respect to the first side cover 14 a on the right side in the drawing. A state in which the moving slider 12 is in contact is shown. The arrangement of the five side covers 14a to 14e is such that the first side cover 14a, the third side cover 14c, and the fifth side cover 14e located on the rightmost side in FIG. The second side cover 14b and the fourth side cover 14d are supported by the inner side cover support member 15b. For example, the first side cover 14a is the first side cover 14a. Located in the first row 25a, the second side cover 14b is located in the third row 25c, the third side cover 14c is located in the second row 25b, and the fourth side cover 14d is The fifth side cover 14e is located in the fourth row 25d, and the fifth side cover 14e is located in the first row 25a. The same arrangement is used in FIGS. 9, 10, 11, and 12.
[0108]
In FIG. 8, the first side cover 14a is pushed by contact with the sliding slider 12, and the vertical side of the side cover central axis CL is centered on the hinge bolt 16 that is a fulcrum of the first side cover 14a. Since the tilt of the tilt angle α, which is an angle with respect to the direction, is started in the sliding direction, and the other side covers 14b to 14e are not in contact with the slider 12, the bottom covers of the side covers 14b to 14e are provided. Due to the action of the provided weight 7, a vertically upright state is maintained.
[0109]
FIG. 9 shows a diagram in which the slider 12 located in FIG. 8 has moved in the sliding direction by the pitch P between the fulcrums that are the centers of tilting of the side covers 14 a to 14 e supported by the side cover support member 15. ing. 9, the first side cover 14a is further pushed by the sliding of the slider 12, and the tilt angle α with respect to the vertical direction of the side cover central axis CL around the hinge bolt 16 is compared with the case of FIG. It is getting bigger.
[0110]
In addition, the second side cover 14b, which is upright in the vertical direction, comes into contact with the slider 12 due to the sliding of the slider 12, and the hinge bolt 16 on which the second side cover 14 is supported is centered. It starts to tilt in the sliding direction. Since the third side cover 14c, the fourth side cover 14d, and the fifth side cover 14e are not in contact with the slider 12, the vertical direction is applied by the action of the weight 17 provided. The upright state is maintained.
[0111]
FIG. 10 shows a diagram in which the slider 12 in the position of FIG. 9 is further moved in the sliding direction by the pitch P. The further movement of the slider 12 further pushes the first side cover 14a, Compared to the case of FIG. 9, the tilt angle of the side cover center axis CL in the vertical direction of the hinge bolt 16 that is the center of tilt is further increased, and the side cover center axis CL in contact between the slider 12 and the side cover 14a is The maximum tilt angle β that is the maximum angle with respect to the vertical direction is reached. Here, the contact between the slider 12 in FIG. 8 and FIG. 9 and the first side cover 14a is that the apex located in the sliding direction of the lower end surface of the slider 12 in FIG. Although the contact with the first side 29a of the cover 14a was made, the contact between the slider 12 in FIG. 10 and the first side cover 14a is the lower end surface of the slider 12 in FIG. The first side 29a of the side cover 14a of the eye comes into contact with the upper apex, and the tilt angle of the first side cover 14a with respect to the vertical direction of the side cover central axis CL reaches the maximum tilt angle β.
[0112]
When the slider 12 moves at a high speed, the tilt angle of the first side cover 14a that stops excessive tilting by the hinge bolt 16 that supports the third side cover 14c is the maximum tilt angle β. Or a tilt angle larger than the maximum tilt angle β. Accordingly, when the slider 12 that slides at a high speed comes into contact with the first side cover 14a, the first side cover 14a that is excessively tilted is stopped.
[0113]
In the second side cover 14b of FIG. 10, the second side cover 14b is pushed by the slider 12 by the movement of the slider 12 by the pitch P as compared with the case of FIG. The tilt angle of 14b is increased.
[0114]
Further, the slider 12 comes into contact with the third side cover 14 c, and the third side cover 14 c starts to tilt around the hinge bolt 16. The fourth side cover 14d and the fifth side cover 14e that are not in contact with the slider 12 remain upright in the vertical direction.
[0115]
FIG. 11 shows a diagram in which the slider 12 at the position of FIG. Due to the movement of the slider 12 by the pitch P, the first side cover 14a is released from the contact of the slider 12, and stands upright in the vertical direction by the action of the weight 17 provided at the lower end of the side cover 14a. It is restored to the state.
[0116]
Compared to the case of FIG. 10, the second side cover 14b is further pushed by the movement of the slider 12, and the lower end surface of the slider 12 of FIG. 11 and the first side cover 14b of the second side cover 14b are first pressed. Contact is made with the upper apex of the side 29a, and the tilt angle of the side cover central axis CL of the second side cover 14b with respect to the vertical direction reaches the maximum tilt angle β. When the slider 12 slides at a high speed, the slider 12 is excessively tilted by the hinge bolt 16 that supports the fourth side cover 14d at a distance 2P from the fulcrum of the second side cover 14b. The second side cover 14b to be stopped is stopped.
[0117]
The third side cover 14c is pushed by the movement of the slider 12 and increases the tilt angle with respect to the vertical direction of the hinge bolt 16 which is the center of tilt. Further, the fourth side cover 14d starts to tilt around the fulcrum of the fourth side cover 14d when the slider 12 comes into contact therewith. Since the fifth side cover 14e is not in contact with the slider 12, the upright state in the vertical direction is maintained by the action of the weight 17 provided.
[0118]
FIG. 12 shows a diagram in which the slider 12 at the position of FIG. Due to the movement of the slider 12 by the pitch P, the second side cover 14b is released from the contact of the slider 12, and stands upright in the vertical direction by the action of the weight 17 provided at the lower end of the side cover 14b. It is restored to the state.
[0119]
Compared to the case of FIG. 11, the third side cover 14c is pushed by the movement of the slider 12, and the lower end surface of the slider 12 of FIG. 12 and the first side of the third side cover 14c. In contact with the upper apex of 29a, the tilt angle of the side cover central axis CL of the hinge bolt 16 of the third side cover 14c with respect to the vertical direction reaches the maximum tilt angle β.
[0120]
When the slider 12 slides at a high speed, the hinge bolt 16 that supports the fifth side cover 14e that is a distance 2P away from the hinge bolt 16 that supports the third side cover 14c. The third side cover 14c that tilts excessively is stopped.
[0121]
The fourth side cover 14d in FIG. 12 is pushed by the slider 12 to increase the tilt angle with respect to the vertical direction of the hinge bolt 16 which is the center of tilt. Further, the fifth side cover 14e starts to tilt around the hinge bolt 16 that contacts the slider 12 and supports the fifth side cover 14e. Since the first side cover 14 a is not in contact with the slider 12, the first side cover 14 a is maintained upright in the vertical direction by the action of the provided weight 17.
[0122]
As described above, the side cover 14 that can be tilted around the fulcrum is provided on the linear guide 10 and tilts following the movement of the slider 12. After the slider 12 passes, the side cover 14 is brought into a predetermined state by the restoring means. By restoring, it is possible to prevent foreign matter from adhering to the slider 12 of the linear guide 10 without hindering the progress of the slider 14.
[0123]
A method of further covering the exposed portion of the linear guide to the outside with the shape of the side cover when the side cover is tilted as the slider slides will be described as a second embodiment.
[0124]
[Second Embodiment] FIG. 13 shows a side view of a linear guide 10 having a side cover 26 according to a second embodiment of the present invention.
[0125]
The linear guide 10 composed of the guide rail 11 and the slider 12 in the second embodiment has the same structure as that of the first embodiment. The dust-proof cover for preventing foreign matter from adhering to the guide rail 11 of the linear guide 10 includes a side cover group 13, an upper cover 17, an end cover 18, and a side lower cover 20. Only the side cover 26 constituting the side cover group 13 is different from that of the first embodiment, and other structures are the same as those of the first embodiment.
[0126]
As shown in FIG. 13, the side cover 26 in the second embodiment has a substantially hexagonal shape, and comes into contact with the hinge bolt 16 that supports the other side cover 26 on the upper portion, so that the tilting is stopped. It has a convex stopper portion 27 for the purpose, and further has a weight attachment portion 28 for providing the weight 17 as a restoring means at the lower part. The weight attaching portion 28 is preferably attached to a position away from the hinge bolt 16 that is the center of tilting in order to secure a sufficient rotational moment when the side cover 26 is restored, and the weight 17 increases as the distance increases. Requires less weight. In addition, the arrangement | sequence and the support method in the side surface cover group 13 of the said side surface cover 26 are the same as that of 1st Embodiment.
[0127]
The arrangement of the side covers 26 in the side cover group 13 is, for example, as shown in FIG. 13 of the hinge bolt 16 in which the first and fifth side covers 26 from the right side in the drawing are attached to the inner side cover support member 15b. The second and sixth side covers 26 are supported by the fourth row 25d, and are supported by the second row 25b of the hinge bolt 16 attached to the outer side cover 15a. The side cover 26 is supported by a third row 25c of hinge bolts 16 attached to the inner side cover support member 15b, and the fourth side cover 26 is attached to the outer side cover support member 15a. Of the first row 25a. In FIG. 13, as in the case of FIG. 5 described above, the portion of the side cover 26 indicated by the alternate long and short dash line indicates the hide line of the side cover 26 supported by the first row 25 a and the second row 25 b. The portion of the side cover 26 indicated by a broken line indicates the hide line of the side cover 26 supported by the third row 25c and the fourth row 25d, and the third row 25c and the fourth row The hidden lines of the hinge bolts 16 that support the side covers 26 of the rows 25d are also indicated by broken lines.
[0128]
  In the substantially hexagonal shape of the side cover 26, the angle γ with respect to the side cover center axis CL of the first side 29a or the second side 29b, which is the upper two sides, is particularly important. As described in the first embodiment, when the side cover 26 is sufficiently pushed by the slider 12, the angle of the side cover central axis CL with respect to the vertical direction becomes the maximum tilt angle β. The angle γ of the first side 29a and the second side 29b of the side cover 26 in the second embodiment with respect to the side cover central axis CL is, for example, in the sliding direction of the slide 12 in FIG. 13 (the arrow direction in FIG. 13). In this case, when the angle of the side cover central axis CL of the side cover 26 with respect to the vertical direction becomes the maximum tilt angle β due to the movement of the slider 12, the sliding of the slider 12 of the side cover 26 and the slider 12 of the side cover 26 is performed. The side opposite to the direction, that is, the first side 29a isIn parallelIt is set at such an angle. The other side 29b is set at the same angle γ.
[0129]
Therefore, the side cover central axis in the state of the angle γ formed by the side cover central axis CL of the side cover 26 and the first side 29a or the second side 29b, the lower end surface of the slider 12, and the maximum tilt angle β. As shown in FIG. 13, it is possible to cover the gap between the lower end surface of the slider 12 and the side cover 26 when passing through the slider 12 as shown in FIG. It becomes possible to further prevent foreign matter from adhering to the ten guide rails 11. This effect can be clearly understood by comparing with FIG. 4 of the first embodiment.
[0130]
The lengths of the sides constituting the side edges 29a and 29b and the other side cover 26 are set to arbitrary lengths that do not interfere with surrounding components. In the second embodiment, the substantially hexagonal side cover 26 has been described. However, as long as the upper side sides 29a and 29b satisfy the above relationship, the shape may be a polygon or a shape having an arc. Good.
[0131]
Next, the operation will be described.
[0132]
Based on FIG. 13, the inclination of the side cover 26 accompanying the sliding operation of the slider 12 of the linear guide 10 will be described below.
[0133]
In the slider 12 sliding in the direction of the arrow in FIG. 13, the slider 12 has already passed through the first and second side covers 26 from the right side in the figure. By the action of the attached weight 17, it is restored to a vertically standing state.
[0134]
  In FIG. 13, the third to fifth side covers 26 from the right side are in contact with the slider 12, and therefore tilt around the hinge bolt 16. In this state, since the third to fifth side covers 26 are sufficiently pressed by the slider 12, the tilt angle of the side cover center axis CL with respect to the vertical direction reaches the maximum tilt angle β. The lower end surface of the slider 12 in the figure and the first side 29a of the side cover 26 areIn parallelTherefore, the adhesion of foreign matter to the guide rail 11 of the linear guide 10 is prevented. In addition, since the side cover 26 located on the leftmost side in FIG. 13 is not in contact with the slider 12, the upright state with respect to the vertical direction is maintained by the action of the weight 17 provided.
[0135]
In the first embodiment and the second embodiment described above, the linear guide has been described as an example. However, for example, a linear motion device constituted by a ball screw or the like may be used.
[0136]
Moreover, in said 1st Embodiment and 2nd Embodiment, although installation of the dustproof cover in this invention with respect to the side part of a linear guide was demonstrated, it is also applicable also to the upper surface part of the said linear guide.
[0137]
The embodiment described above is described in order to facilitate understanding of the present invention, and is not described in order to limit the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.
[Brief description of the drawings]
FIG. 1 is an overall view of a clamp device including a linear guide having a side cover in a welding process according to a first embodiment of the present invention.
FIG. 2 is a perspective view of the entire linear guide having a side cover according to the first embodiment of the present invention.
FIG. 3 is an exploded perspective view of a linear guide provided with a side cover according to the first embodiment of the present invention.
FIG. 4 is a partial cross-sectional view of a linear guide having a side cover according to the first embodiment of the present invention.
FIG. 5 is a side view of the side cover and the slider when the slider slides in the first embodiment of the present invention.
6 is a plan view of a side cover portion in the case of FIG. 5. FIG.
FIG. 7 is a side view when a spiral spring is used as the restoring means in the first embodiment of the present invention.
FIG. 8 is a diagram showing a tilting operation of the side cover when the slider of the linear guide in the first embodiment of the present invention slides and the slider contacts the first side cover.
9 is a view showing a tilting operation of the side cover when the slider slides by a pitch P from the state of FIG.
10 is a view showing a tilting operation of a side cover when the slider slides by a pitch P from the state of FIG.
11 is a diagram showing a tilting operation of the side cover when the slider slides by a pitch P from the state of FIG.
12 is a view showing a tilting operation of the side cover when the slider slides by a pitch P from the state of FIG.
FIG. 13 is a diagram showing a side view of a linear guide provided with a side cover in a second embodiment of the present invention.
FIG. 14 is a perspective view showing a dustproof cover of a belt winding structure in the prior art.
FIG. 15 is a perspective view showing a dust-proof cover having a brush structure in the prior art.
FIG. 16 is a perspective view showing a dust cover having a curtain structure in the prior art.
FIG. 17 is a perspective view showing a dustproof cover with a nested structure in the prior art.
[Explanation of symbols]
10 ... Linear guide
10a ... 1st Z-axis direction linear guide
10b ... Second Z-axis direction linear guide
10c ... 1st Y-axis direction linear guide
10d ... Second Y-axis direction linear guide
10e ... 1st X-axis direction linear guide
10f 2nd X-axis direction linear guide
11 ... Guide rail
11a ... rolling element guide groove
12 ... Slider
12a ... sliding part
12b ... Refueling part
12c ... Slider support part
13 ... Side cover group
14 ... Side cover
14a ... first side cover
14b ... the second side cover
14c ... Third side cover
14d ... 4th side cover
14e ... Fifth side cover
15 ... Side cover support member
15a ... Outer side surface cover support member
15b ... inner side cover support member
16 ... Hinge bolt
17 ... Weight
18 ... Upper cover member
19 ... end face cover member
20 ... Lower side cover member
21 ... Bolt
22 ... Guide rail support member
23 ... spiral spring
25a ... first side cover row
25b ... row of second side covers
25c ... third side cover row
25d ... fourth side cover row
26 ... Side cover
27 ... Stopper
28 ... Weight attachment part
29a ... first side
29b ... second side
30 ... Dustproof belt
31 ... Belt winder
40 ... Dustproof brush
41 ... Mounting frame
50 ... Dust-proof cloth curtain
60 ... Gate-type cover
100 ... welding robot
110 ... Welding gun
120 ... Work
130 ... Clamping device
131 ... Base part
132a ... first Z-axis direction actuator
132b ... Second Z-axis direction actuator
132c. First Y-axis direction actuator
132d. Second Y-axis direction actuator
132e ... first X-axis direction actuator
132f. Second X-axis direction actuator
133a ... first actuator
133b ... second actuator
134a ... 1st work fixing part
134b ... second workpiece fixing portion
135a ... first actuator support member
135b ... second actuator support member
CL ... Center axis of side cover
P: Pitch between fulcrums of side cover
α: Side cover tilt angle
β: Maximum side cover tilt angle
γ ... An angle of the upper two sides with respect to the side cover center axis
θ: Angle between side cover center axis and slider bottom surface

Claims (7)

A dust-proof cover having a plurality of covers that can be tilted with respect to the sliding direction of the sliding body of the linear motion device,
The cover is
A fulcrum for tilting,
A first side in contact with the sliding body moving in one sliding direction;
A second side in contact with the sliding body that moves in the other sliding direction;
Have a, and restoring means for restoring the cover to its original state when said cover and said sliding body is a non-contact state,
A dust-proof cover provided at a position where a fulcrum of the cover comes into contact with another tilted cover and stops tilting of the other cover. The plurality of covers are arranged in a plurality of rows along the sliding direction of the sliding body so that both ends of the sliding body in the sliding direction overlap each other with an end of an adjacent cover. The dust cover described. The dustproof cover according to claim 1 or 2, wherein the restoring means is a weight provided at a position vertically downward with respect to the fulcrum of the cover in a non-contact state of the sliding body. The dust cover according to any one of claims 1 to 3 , wherein the cover is a thin metal plate. The dust cover according to any one of claims 1 to 4 , wherein a cover group having one or more of the covers is detachable from the linear motion device. When the cover tilts in one sliding direction , the first side is parallel to the lower end surface of the sliding body,
Sometimes the cover in the other sliding direction is tilted, dust cover according to the second sides either 5 from the lower surface and parallel to that Do claim 1 of the slider. A linear motion device having a guide body and a slide body movable along the longitudinal direction of the guide body,
A linear motion device comprising the dustproof cover according to any one of claims 1 to 6 .

Images