JP2021017896A - Table circulation guide device - Google Patents

Abstract

To provide a table circulation guide device in which a slider and a carriage are attached to a table and a lubrication device is provided at the carriage to reduce wear of a rail and a roller.SOLUTION: In a table circulation guide device, a circuit 30 is formed into an endless circulation path by a straight track rail 2 and a curved track rail 3. A lubrication device 4 is provided in a carriage 6 attached to a table 1. The lubrication device 4 comprises: a lubrication member 18A including a protruding part 35 which contacts with a roller 9 of the carriage 6 and slides on the roller 9; a cover 21A which houses the lubrication member 18A; and a plate spring 32 which is housed in the cover 21A and causes the protruding part 35 of the lubrication member 18A to slidably contact with an engagement groove 47 of the roller 9.SELECTED DRAWING: Figure 7

Description

The present invention relates to a table circulation guide device including a table that circulates and guides a circumferential circuit composed of a linear guide rail and a curved track rail via a slider and a carriage with a lubricator.

Conventionally, the table circulation guide device is configured so that the table circulates on the track rail forming the circumferential circuit arranged on the bed, and the circumferential circuit is composed of a linear guide region and a curved guide region. For example, the linear guidance area is defined as a working area, and the curved guiding area is configured as a non-working area. Normally, a table circulation guide device circulates and moves an object such as a work or device placed on a table on a peripheral circuit, and machining the object in a work area of a linear guide area in the middle of the peripheral circuit. ， It is used to perform work such as assembly work.

Conventionally, as a table circulation guide device, a slider and a carriage are attached to the table, the table is supported and guided by a slider that straddles the straight track rail in the work area, and the table is supported and guided by the carriage that runs on the curved track rail in the non-work area. What to do is known. In the table circulation guide device, a peripheral circuit is formed in an infinite circulation path by a straight track rail and a curved track rail. Both end faces of the straight track rail on the outside of the peripheral circuit and both end faces of the straight track rail on the inside are installed on the bed so as to be offset in the traveling direction of the table. The table is supported by two sliders on the outer straight track rail and one slider on the inner straight track rail (see, for example, Patent Document 1).

Further, in a component mounting device using a linear motor, a plurality of bearing guides that are connected to the bottom of the moving beam and guide the moving beam in a rolling manner are described. The bearing guide has a lubrication device that applies a lubricant to the bearing and its outer peripheral surface. The lubricator is screwed to each bearing. Further, the lubrication device is urged and brought into contact with the outer peripheral surface of the bearing by a spring member (see, for example, Patent Document 2).

In addition, a lubricator that supplies a lubricant to the outer peripheral surface of the cam follower is described. The lubricator is a porous product made of high-density polyethylene resin fine particles, for example, a powder having a fine particle size of 30 μm and a coarse particle size of 250 to 300 μm, which is filled in a molding die and pressure-heat molded. A lubricating member obtained by impregnating the sintered resin member of No. 1 with a lubricant is used (see, for example, Patent Document 3).

WO 2019/009105 Japanese Unexamined Patent Publication No. 2012-146944 Japanese Unexamined Patent Publication No. 2004-270876

The table circulation guide device disclosed in Patent Document 1 according to the present applicant does not have a configuration for supplying a lubricant to the rollers of the carriage, and extends in the longitudinal direction on both sides provided on the curved track rail. Engagement grooves forming the rolling surface of the roller are fitted and slidably fitted into the wedge-shaped protrusions to be supported. Therefore, in the table circulation guide device, it is conceivable to apply a lubricant to the curved track rail in order to prevent the wedge-shaped protrusion of the curved track rail from being worn due to the rolling of the roller provided on the carriage. There is a problem that it is difficult to apply a lubricant to the formed wedge-shaped protrusion extending in the longitudinal direction, and it is difficult to apply the lubricant evenly to the curved track rail. Further, the techniques of Patent Document 2 and Patent Document 3 have a problem that the installation work becomes complicated because a lubrication device is provided for each roller.

An object of the present invention is to solve the above-mentioned problems, and in the table circulation guide device disclosed in WO2019 / 001005 according to the present applicant, a wedge shape of a curved track rail is passed through a roller provided on a carriage fixed to a table. It has a structure to lubricate the protruding part. First, a lubricator having a lubricating member of a porous sintered body capable of lubricating the rollers is provided on the carriage, and a lubricant is applied to each roller. While reducing the number of steps to install the lubrication device to be supplied, the lubricant is always applied evenly to the rolling surface of the rollers to lubricate the wedge-shaped protrusions of the curved track rail on which the rollers roll through these rollers, and the wedge-shaped protrusions. It is an object of the present invention to provide a table circulation guide device characterized in that wear of a roller can be prevented as well as a portion.

According to the present invention, a bed, a pair of linear track rails installed in a linear motion guide area on the bed, and an arcuate curved track installed on the end side of the linear track rail installed in the bending guide area. In a table circulation guide device including a circumferential circuit composed of rails, a table that circulates along the circumferential circuit, and a linear motor type transfer system that circulates and conveys the table on the circumferential circuit.
The circuit is configured as an infinite circulation path in which the table can be circulated by at least two pairs of the linear track rails and at least a pair of curved track rails installed on the end side of the straight track rails. Be done,
On the lower surface of the table, a plurality of sliders attached to both sides in the width direction traveling across the straight track rail and a pair of rollers arranged before and after the traveling direction traveling on the curved track rail, respectively. A pair of carriages that are mounted and located between the sliders are mounted.
The carriage relates to a table circulation guide device, characterized in that the carriage is provided with a pair of lubricating devices provided with lubricating members that are in sliding contact with the rolling surfaces of the pair of rollers to supply a lubricant.

Further, the lubricating member includes a protrusion having at least one sliding contact surface that is in sliding contact with the rolling surface of the roller.

Further, the protrusion formed on the lubricating member is formed on the sliding contact surface curved along the outer peripheral surface which is the rolling surface of the roller provided on the carriage.

Further, the lubricating device has a spring member that presses the protruding portion of the lubricating member against the rolling surface of the roller to bring it into sliding contact.

Further, the carriage is composed of a connecting plate rotatably attached to the table via a swivel bearing and a pair of rollers rotatably attached to the table separated in the width direction of the connecting plate. The roller is provided with an engaging groove in which the rolling surface is formed so as to be slidably and rotationally slidably contacted with wedge-shaped protrusions extending in the longitudinal direction on both sides of the curved track rail.

Further, the lubricating device includes an opening provided on the roller side for accommodating the centrally located connecting portion for fixing to the carriage and the lubricating member located on both sides of the connecting portion in the width direction. It has a cover composed of a portion, and the spring member is arranged in the accommodating portion of the cover. Further, the cover is provided so that the openings formed in the cover face each other with respect to the carriages arranged in the front-rear direction in the moving direction, and the rollers provided in the pair of carriages are paired. It is covered by the cover.

Further, the lubricating member is composed of a connecting portion housed in the cover and a pair of lubricating portions provided with protrusions supported on both sides in the width direction of the connecting portion.

As described above, the table circulation guide device according to the present invention is provided with a lubrication device for supplying a lubricant to a pair of rollers, and the lubricator abuts on the rolling surfaces of the pair of rollers for lubrication. Since it is equipped with members, it is possible to reduce the number of steps required to install a lubricant that supplies lubricant to the rolling surface of each roller, and the lubricant can be applied to the rollers constantly and evenly, and the curved track rail can be applied through those rollers. Lubricants can be evenly supplied to the wedge-shaped protrusions at all times, improving the lubrication function, reducing friction and reducing wear. That is, in this table circulation guide device, since the lubricant can be supplied to a pair of rollers with one lubricator, it is not necessary to provide a lubricator for each roller. Therefore, the number of steps required to install the lubricator can be reduced as compared with the conventional technique of attaching the lubricant to each roller, and the lubricant lubricated to the roller forms a wedge-shaped protrusion from the roller to form the raceway surface of the curved track rail. It is applied to the part and the lubricant can be constantly supplied to the curved track rail. Further, since the lubricator is provided on the carriage traveling along the curved track rail, the lubricant can be uniformly applied from the lubricating device to the curved track rail. In this case, by providing the lubricator with a spring member that presses the protrusion of the lubricating member on the rolling surface of the roller, the sliding surface of the protruding portion of the lubricating member is formed into an engaging groove forming the rolling surface of the roller. It can be reliably contacted and slid. Further, since the protrusion of the lubricator is formed on the sliding contact surface curved along the outer peripheral surface which is the rolling surface of the roller, the sliding contact surface between the protrusion and the roller becomes large and secures each other. It can be contacted, the amount of lubricant supplied to the rollers is abundant, and the lubrication state can be achieved well. The lubricator can be configured, for example, with a structure in which a cover is screwed to a connecting plate so as to straddle a curved track rail, and the lubricator is fixed to a carriage. Further, a roller that rolls on a curved track rail has a protrusion having a sliding surface that is inserted into the engaging groove of the roller when the engaging groove is supported by a wedge-shaped protrusion of the curved track rail and rolls. By forming the lubricant on the lubricating member, the lubricant can be reliably and properly supplied to the engaging groove. The slider may be provided with a well-known plate-shaped or sleeve-shaped lubricating member. As a result, lubricant can be lubricated not only to the rollers but also to the sliders, and maintenance-free lubrication of the table circulation guide device can be realized. Further, in the linear motor type transfer system, the table circulation guide device of the present invention can be used as the device for circulating and transporting the table.

It is a perspective view which shows the Example of the table circulation guide device by this invention. It is a perspective view which shows the state which attached the linear motor type transfer system to the table circulation guide device of FIG. FIG. 5 is a partially enlarged plan view showing a state in which the table is removed from the table circulation guide device of FIG. 1, the slider is straddled on the linear track rail, and the carriage is straddled on the linear guide rail. FIG. 5 is a partial cross-sectional view showing a state in which a slider and a carriage are attached to a table located in a region of a straight track rail and a straight guide rail in the table circulation guide device of FIG. FIG. 5 is an enlarged plan view showing a straight track rail, a straight guide rail, and a curved track rail at the boundary between the linear guide region and the bending guide region in FIG. It is a perspective view which shows the state which attached the 1st Embodiment of the lubrication device to the carriage in this table circulation guide device. It is a perspective view which shows the state which disassembled the lubrication device in the carriage provided with the lubrication device of FIG. It is an enlarged sectional view which shows the lubrication apparatus of FIG. It is a top view which shows the carriage provided with the lubrication device of FIG. 9 is a partial cross-sectional view showing a carriage provided with a lubricator in line segments AA of the carriage of FIG. 9A. 9 is a rear view showing a carriage provided with the lubrication device of FIG. 9A. It is the schematic explaining the state which screwed the lubricator to a carriage. It is a 2nd embodiment of the lubrication device provided in the carriage in this table circulation guide device, and is the cross-sectional view which shows the shape which formed the protrusion part of the lubrication member in a lubrication device into an R curved surface. It is a perspective view of the carriage provided with the lubrication device of the 3rd Embodiment of this table circulation guide device. It is an exploded perspective view which disassembled the lubrication device provided in the carriage of FIG. 12A. It is a perspective view which shows the disassembled state of the lubrication device of 4th Example in the carriage provided with the lubrication device. It is a top view which shows the carriage provided with the lubrication device before disassembly of FIG. 13A. It is sectional drawing which shows the carriage which provided the lubrication device in the line segment CC of FIG. 13B. It is a rear view which shows the carriage provided with the lubrication device of FIG. 13B. It is an exploded perspective view which disassembled the lubrication device in the carriage provided with the lubrication device of 5th Embodiment of this invention. FIG. 14A is a plan view showing a carriage provided with a lubricator before disassembly in FIG. 14A. 14 is a partial cross-sectional view showing a carriage provided with a lubricator in line segments DD of FIG. 14B. It is a rear view which shows the carriage provided with the lubrication device of FIG. 14B. It is an exploded perspective view which shows the disassembled state of the lubrication device of 6th Example provided in the carriage in this table circulation guide device. FIG. 15A is a plan view showing a carriage provided with a lubricator before disassembly in FIG. 15A. FIG. 15 (b) is a rear view showing a carriage provided with the lubrication device of FIG. 15 (b). It is sectional drawing which shows the carriage which provided the lubrication device in the line segment EE of FIG. 15 (b). It is a perspective view which shows the state which provided the dustproof cover which covers the whole of the table circulation guide device by this invention. It is a top view which shows typically the table circulation guide device by this invention. It is sectional drawing which shows the state seen in the direction of the arrow in the line segment FF of the table circulation guide device of FIG. 17A.

Hereinafter, examples of the table circulation guide device according to the present invention will be described with reference to the drawings. This table circulation guide device is characterized in that a lubrication device 4 is provided on the carriage 6 in the table circulation guide device disclosed in WO2019 / 009105 according to the present applicant, and the linear track rail 2, the linear guide rail 5, The configurations of the curved track rail 3, the slider 8, the carriage 6, and the linear motor type transfer system 60 are those disclosed in the above publication.

First, the outline of the table circulation guide device according to the present invention will be described with reference to FIGS. 1 to 5. Next, a first embodiment of the table circulation guide device according to the present invention will be described with reference to FIGS. 6 to 10. As shown in FIG. 2, the table circulation guide device uses a transfer system 60 having a built-in movable magnet type linear motor as a drive means for circulating and transporting the table 1 on the peripheral circuit 30. The linear motor type transfer system 60 is installed on the bed 31 via a support base 43 [see FIG. 17 (b)] composed of a frame or the like. As shown in FIG. 1, this table circulation guide device includes a pair of linear track rails 2 fixed to a linear motion guide area which is a work area 28 on the bed 31 and the bed 31, and one linear guide rail extending between them. A peripheral circuit 30 composed of 5 and a pair of curved track rails 3 fixed to a bending guide region which is a non-working region, a table 1 which circulates along the peripheral circuit 30, and a table 1 are placed on the peripheral circuit 30. It is composed of a linear motor type transport system 60 that circulates and transports in. The straight track rails 2 have two sets that are parallel to each other and extend in the longitudinal direction, and the curved track rails 3 are a pair that are arranged on both end 23 sides of the straight track rails 2. It extends in an arc shape. As shown in FIG. 6, the straight guide rail 5 is arranged between the straight track rails 2 and is connected to both end portions 57 of the curved track rail 3 by a second connecting portion 27, respectively. The peripheral circuit 30 is an infinite circulation path in which the table 1 can be circulated by two pairs of straight track rails 2 arranged on the bed 31 and a pair of curved track rails 3 located on both ends thereof. Is formed in. Further, in this table circulation guide device, as the drive means, for example, a drive means such as a belt drive type can be used instead of the transfer system 60 having a built-in movable magnet type linear motor. The linear motor type transfer system 60 is shown in FIG. 16 (b). It is installed on the bed 31 on the frame 40 constituting the support base 43.

In this table circulation guide device, as shown in FIG. 1, the peripheral circuit 30 is, for example, a set of straight lines extending along the straight line track rail 2 between two sets of a pair of straight line track rails 2 and a straight line track rail 2. The table 1 is configured as an infinite circulation path in which the table 1 can be circulated by the guide rail 5 and the curved track rails 3 connected to the straight guide rail 5 at both ends 23 of the straight track rail 2. Regarding the peripheral circuit 30 in this table circulation guide device, in the first embodiment, the load mounted on the table 1 is installed outside the peripheral circuit 30, and is not necessarily limited to the illustrated one. Instead, the perimeter circuit disclosed in WO2019 / 009105 disclosed earlier by the applicant can be used. As shown in FIG. 4, the lower surface 50 of the table 1 has sliders 8 attached to both sides in the width direction running across the straight track rail 2 and a pair of rollers 9 on the curved track rail 3. A pair of carriages 6 are attached which are located between the sliders 8 and are provided in the front-rear direction in the traveling direction. As shown in FIGS. 2 and 17B, the linear motor type transfer system 60 is a printed circuit board (not shown) composed of a plurality of linear modules 61 and curved modules 62 installed along the circumferential circuit 30. ) Consists of an armature assembly 19 composed of an armature coil and a field magnet 65 composed of a plurality of permanent magnets located facing the armature coil and supported by a support 59 on a table 1. It consists of a movable magnet type linear motor. As shown in FIG. 17B, the field magnets 65 composed of a plurality of permanent magnets are arranged adjacent to each other in the traveling direction of the table 1. Further, the armature assembly 19 composed of a plurality of armature coils is arranged so as to extend upward adjacent to the peripheral circuit 30.

As shown in FIG. 4, this table circulation guide device includes a linear motion guide unit composed of a slider 8 and a straight track rail 2, and the slider 8 attached to the lower surface 50 of the table 1 is shown in FIG. As shown in the above, the casing 37 and the casing 37 in which a track groove formed so as to face the track grooves formed on both side surfaces of the pair of straight track rails 2 and a return path extending parallel to the track groove are formed. The end cap 48, which is arranged on both end surfaces and has an arcuate turning path forming an arc-shaped turning path that communicates the track path and the return path formed between the track groove of the casing 37 and the track groove of the straight track rail 2. It is composed of an end seal 49 attached to the end face of the end cap 48, and a rolling element that rolls on a circulation path including a track path, a return path, and a pair of direction change paths. In this table circulation guide device, the lower surface (see FIG. 4) or the upper surface (see FIG. 17 (b)) of the linear track rail 2 supporting the slider 8 fixed to the lower surface 50 of the table 1 is the upper surface of the bed 31. A shim 14 for adjusting the height is arranged between the two, and the height direction is set to a predetermined height. Since the carriage 6 is attached to the lower surface 50 of the table 1, this table circulation guide device adjusts the height on the lower surface of the straight track rail 2 in order to secure a space for arranging the carriage 6 under the table 1. The height of the peripheral circuit 30 is adjusted by disposing a shim 14 which is a table. A concave groove 20 is formed in the shim 14 in the longitudinal direction in order to dispose the straight track rail 2, and the concave groove 20 constitutes a mounting surface of the straight track rail 2. The table 1 fixed to the slider 8 is supported on the straight track rail 2 and travels. Further, in this table circulation guide device, as shown in FIG. 5, the end portion 57 of the straight track rail 2 is formed in a taper 22 that gradually narrows in a tapered shape, and the track groove formed in the casing 37 of the slider 8. A gap is formed that gradually increases with respect to the space, and the rolling elements of the slider 8 are freed at both ends of the straight track rail 2 due to the gap, and the table 1 is smoothly converted to the curved track rail 3 by the carriage 6. Will be guided. The lubricating member 18A is not limited to this embodiment. Well-known lubricating members can also be applied.

When the peripheral circuit 30 as shown in FIGS. 1 and 3 is used, the slider 8 traveling on the straight track rail 2 outside the peripheral circuit 30 is set in consideration of the eccentric load of the load mounted on the table 1. Two sliders 8 fixed to the table 1 and traveling on the inner straight track rail 2 are fixed to the table 1 and are configured to ensure stability against an unbalanced load applied to the table 1. There is. That is, the various rails constituting the circumferential circuit 30 are linear guides of the straight rails arranged between the straight track rails 2 and the straight track rails 2, which are two pairs of straight rails extending in the linear direction on the bed 31. It is composed of a curved track rail 3 of a curved rail connected to both end surfaces of the rail 5 and the straight guide rail 5. Further, between the pair of straight track rails 2, a straight guide rail 5 which is one straight rail extends parallel to the straight track rail 2 and is installed on the bed 31, respectively. Both ends 51 of the linear guide rail 5 are connected to the end 57 of the curved track rail 3. As shown in FIG. 4, the linear guide rail 5 is provided with wedge-shaped protrusions 46 extending in the longitudinal direction on both side surfaces, and the wedge-shaped protrusions 46 have a gap in the engagement groove 47 of the roller 9 of the carriage 6. Therefore, the wedge-shaped projecting portion 46 of the linear guide rail 5 is freed from the roller 9 and does not support the load of the table 1, and is linearly guided via the pair of rollers 9 of the carriage 6. It is in a state of straddling the rail 5. Therefore, while the table 1 is traveling on the straight track rail 2, the carriage 6 is in a state of not rotating on the straight guide rail 5. However, in this table circulation guide device, since the pair of rollers 9 of the carriage 6 are straddled by the linear guide rail 5, the carriage 6 is connected to the curved track rail 3 from the linear guide rail 5 by the second connecting portion. 27 can be smoothly transferred, and the table 1 is smoothly guided through the peripheral circuit 30.

Further, when the table 1 travels in the work area 28 on the straight track rail 2, as shown in FIG. 4, the table 1 is via two sliders 8 on the inner side and the outer side, respectively, which travel on the straight track rail 2. When traveling on the non-working area 29 on the curved track rail 3, although not shown, it is located between the sliders 8 attached to the table 1 in the traveling direction. It travels while being supported by the curved track rail 3 via a pair of carriages 6 provided on the front and rear. That is, if the guidance of the roller 9 and the slider 8 of the carriage 6 is configured to function at the same time, for example, when the height positions of the slider 8 and the roller 9 deviate from a predetermined position, the slider 8 and the roller 9 move up and down. There is a possibility that a phenomenon may occur in which the table 1 cannot be guided smoothly due to mutual tension and interference. Therefore, in this table circulation guide device, in the region of the straight rail in the peripheral circuit 30, the table 1 reciprocates along the straight track rail 2 by the slider 8, and in the curved rail region in the peripheral circuit 30, the curved track rail 3 is used. The carriage 6 is configured to guide and move the table 1 along the rail.

Further, as shown in FIG. 4, the carriage 6 is attached to the lower surface 50 of the table 1, is installed before and after the traveling direction of the table 1, and is rotated by the swivel bearing 7 of the built-in cross roller bearing. It is freely attached to a fixing plate 12 fixed to the table 1. Specifically, the carriage 6 is mounted on the table 1 with a connecting plate 13 attached to the rotating shaft 10 of the swivel bearing 7 by a mounting screw 15 and a rotating support shaft spaced apart from each other in the width direction of the connecting plate 13. It is composed of a pair of rollers 9 rotatably attached to 11. The roller 9 is provided with an engaging groove 47 formed of a concave groove having a V-shaped cross section extending in the circumferential direction, which is rotatably and slidably supported by wedge-shaped protrusions 46 extending in the longitudinal direction on both sides of the curved track rail 3. Further, as shown in FIG. 4, the swivel bearing 7 includes an outer ring 16 fitted and fixed to a recess 41 formed in the lower surface 50 of the table 1, an inner ring 17 fixed to the outer peripheral surface of the rotating shaft 10, and an inner ring 17. It is composed of a cross roller bearing composed of a cylindrical roller 42 that rolls between the outer ring 16 and the inner ring 17. A rotating shaft 10 to which the inner ring 17 is fixed is attached to the connecting plate 13 by a mounting screw 15.

In this table circulation guide device, when the table 1 travels on the curved track rail 3 of the curved rail, the slider 8 inside the circumferential circuit 30 is released from the straight track rail 2 and travels along the curved track rail 3. Therefore, when the slider 8 travels along the curved track rail 3, the slider 8 is not restricted by the straight track rail 2, and the slider 8 is not involved in the traveling of the table 1. Further, the slider 8 uses a type of slider 8 provided with a holding member (not shown) for holding the rolling element in the casing 37 so as to prevent the rolling element from falling out of the raceway groove of the casing 37. It is configured in. The slider 8 attached to the lower surface 50 of the table 1 uses one inside and two outside with respect to the straight track rail 2, and the number of sliders 8 used is minimized, so that the weight can be reduced. ， The inertia (inertia) of the table 1 can be made small.

In the table circulation guide device according to the present invention, in particular, the carriage 6 is provided with a lubrication device 4 provided with a pair of lubricating members 18 that are in sliding contact with each other of the rolling surfaces 54 of the pair of rollers 9 to supply a lubricant. It is characterized by being. First, a first embodiment of the lubrication device 4 provided on the carriage 56 in the table circulation guide device according to the present invention will be described with reference to FIGS. 6 to 10. The lubrication device 4 has a leaf spring 32 which is a spring member that brings the lubrication member 18A into contact with the rolling surface 54 of the roller 9. The leaf spring 32 is formed, for example, in a substantially V-shaped chevron shape, and the sleeve portions 64 at the tip are inserted into the locking grooves 24 on both sides of the lubricating member 18A, and the lubricating member 18A is sandwiched between the leaf springs 32. The 32 and the lubricating member 18A are integrated and mounted on the cover 21A. Further, the carriage 6 is composed of a connecting plate 13 rotatably attached to the table 1 via a swivel bearing 7 and a pair of rollers 9 rotatably attached to the table 1 so as to be spaced apart from each other in the width direction of the connecting plate 13. It is configured. The roller 9 includes an engaging groove 47 in which a rolling surface 54 is formed on each of wedge-shaped protrusions 46 extending in the longitudinal direction on both sides of the curved track rail 3 so as to be rotatably and slidably supported. The leaf spring 32 is arranged in the accommodating portion 33 of the cover 21A and presses the lubricating member 18A against the roller 9 to bring them into sliding contact with each other. The protrusion 35 has a sliding contact surface 55 formed on a wedge-shaped tapered surface.

As shown in FIGS. 7 and 8, the lubricator 4 mainly uses a pair of lubricating members 18A that abut on the pair of rollers 9 provided on the carriage 6, a cover 21A that houses the lubricating members 18A, and the lubricating members 18A as the rollers 9. It has a leaf spring 32 which is a spring member that presses against. In this table circulation guide device, an engaging groove 47 that can be engaged with the curved track rail 3 is formed on the outer peripheral surface of the roller 9, and the protrusion 35 of the lubricating member 18A is inserted into the engaging groove 47. It abuts on the rolling surface 54 of the roller 9 to lubricate it. The lubricating member 18A includes one protrusion 35 that protrudes from the opening 67 of the cover 21A and is in sliding contact with the rolling surface 54 of the roller 9. The lubricating member 18A includes, for example, an open pore prepared by filling a molding die with fine particles of high-density polyethylene resin, for example, a powder having a fine particle size of 30 μm and a coarse particle size of 250 to 300 μm, and pressurizing and heating. The porous sintered resin member is impregnated with a lubricant. In the lubricating member 18A, since the sliding contact surface 55 is formed in the shape of the curved surface 68 along the outer peripheral surface of the roller 39, the sliding contact surface between the protrusion 35 and the roller 9 becomes large and can be reliably contacted with each other. , The amount of lubricant supplied to the roller 9 can be increased, and a good lubrication state can be achieved. Further, the lubricating member 18A has a main body portion 25 that serves as a lubricant storage portion and a protrusion 35 that serves as a refueling portion that is inserted into the engaging groove 47 of the roller 9. Engagement protrusions 45 that engage with the locking portions 44 of the cover 21 are provided at both ends of the lubricating member 18A. The lubricant impregnated in the lubricating member 18A moves from the main body 25 to the protrusion 35 due to the capillary phenomenon and is lubricated to the roller 9.

9 (a), (b) and (c) show a first embodiment in which the lubricator 4 is attached to the carriage 6 in the table circulation guide device. The lubrication device 4 is composed of a cover 21A, a lubrication member 18A arranged in a housing portion 33 thereof, and a leaf spring 32. The cover 21A is formed in a substantially gate shape so as to straddle the curved track rail 3 and the straight guide rail 5. Lubricating members 18A and accommodating portions 33 for leaf springs 32 are formed at both ends of the cover 21A. A locking portion 44 (see FIG. 8) with which the engaging projection 45 of the lubricating member 18A is engaged is formed on the inner surface of the accommodating portion 33 formed on the cover 21A so that the accommodated lubricating member 18A does not fall off. It is configured in. Holes 69 (four in FIG. 12) used during molding are provided at positions in the width direction in which the accommodating portion 33 of the cover 21A is formed. At the time of injection molding of the cover 21A, a pin is arranged at the position of the hole 69 and injection molding is performed so that the cover 21A is not forcibly removed at the time of demolding. In this table circulation guide device, the leaf spring 32 incorporated in the lubrication device 4 is formed in a substantially V shape. A pair of locking grooves 24 that can be inserted to lock both ends of the leaf spring 32 are formed on the back surface of the lubricating member 18A. The lubricating member 18A is pressed against the roller 9 by the elasticity of the leaf spring 32. The leaf spring 32 is not always necessary as long as the lubricating member 18 can be brought into contact with the roller 9. For example, as shown in FIGS. 9A, 9C and 10A, the screw 38 passed through the mounting hole 56 (FIG. 7) of the lubricating member 18A is screwed into the screw hole 63 of the carriage 6 for lubrication. The member 18A can be fixed to the carriage 6. Further, the sliding contact surface 55 of the protrusion 35 of the lubricating member 18A can be brought into sliding contact with the rolling surface 54 of the engaging groove 47 formed in each roller 9.

According to the first embodiment of the table circulation guide device, the protrusion 35 of the lubricating member 18A comes into contact with the engaging groove 47 of the roller 9, and the lubricant can be lubricated to the roller 9 through the protrusion 35. In addition, the lubricant can be lubricated to the wedge-shaped protrusion 46 of the curved track rail 3 via the roller 9, and the lubricant can be evenly applied to the curved track rail 3. By providing the slider 8 with a well-known lubricating member (sleeve, plate shape, etc.), the lubricant can be supplied to the slider 8 as well, and lubrication maintenance-free of the device can be realized. Further, the taper 22 of the first connecting portion 26 located at both ends of the straight track rail 2 can be hardened by quenching or the like. As a result, it is possible to reduce the occurrence of wear, flaking, etc. of the taper 22 of the first connecting portion 26 due to the impact when the slider is inserted into the first connecting portion 26, and the slider 8 at the end 23 of the linear track rail 2 The running noise at the time of insertion and removal can also be reduced. Further, when a carburized and nitrided chrome molybdenum steel is subjected to hard chrome plating to form a rust preventive film as the curved track rail 3, the lubricant on the surface (rolling surface) of the curved track rail 3 is used. If it is insufficient, the plating layer may peel off and problems such as rusting may occur. In particular, in this embodiment, when a load is applied in the vertical direction, the plating layer on the upper surface of the wedge-shaped protrusion 46, which is the raceway surface of the curved track rail 3, may be peeled off. However, according to this embodiment, since the lubricant can be applied to the entire area of the curved track rail 3, peeling of the plating layer can be suppressed. In the first embodiment, the protrusion 35 of the lubricating member 18A is formed in a triangular shape so as to match the engagement groove 47 of the V groove of the roller 9, but as shown in FIG. 11, the protrusion 35 is formed into the engagement groove. It can be formed on an R curved surface 70 that easily comes into contact with 47.

Next, a second embodiment of this table circulation guide device will be described with reference to FIGS. 12 (a) and 12 (b). In the second embodiment, the configuration of the cover 21B of the lubricator 4 provided on the carriage 6 is different from that in the first embodiment. Other configurations are the same. Since the carriage 6 has a configuration in which a pair of rollers 9 rotate along the curved track rail 3, the lubricant may be scattered around due to the centrifugal force during the rotation. In such a case, as shown in FIG. 12, only the protrusion 35 of the lubricating member 18B may be exposed, and the other portion may be covered with the cover 21B. The cover 21B is arranged so that the openings 67 face each other in the moving direction of the carriage 6 on the linear guide rail 5, and both side surfaces 36 of the cover 21B, front and rear end faces 39 in the moving direction, and an upper surface 52 are formed on the wall surface. As a result, the rollers 9 of the carriage 6 are covered with a pair of covers 21B facing each other. Further, since the roller 9 is covered with the cover 21B, it is possible to prevent the lubricant applied to the roller from scattering to the surroundings due to the centrifugal force due to the rotation of the roller 9. The table circulation guide device of the second embodiment is preferable for use in an application requiring high cleanliness due to the above configuration.

Next, a third embodiment of the table circulation guide device according to the present invention will be described with reference to FIGS. 13 (a), 13 (b), (c) and (d). In the third embodiment, the lubrication member 18C has one protrusion 35 in the first embodiment. The difference is that two protrusions 35 of each lubricating member 18C are formed. In the third embodiment, the configuration of the lubricator 4 provided on the carriage 6 is different from that in the first embodiment. Other configurations are the same. The lubricating member 18C includes two projecting portions 35 that protrude from the opening 67 of the cover 21C and are in sliding contact with the rolling surface 54 of the roller 9, and the projecting portions 35 are formed on a wedge-shaped tapered surface. It has a sliding contact surface 55. Further, the lubricating member 18C is composed of a pair of lubricating portions 34 having a connecting portion 58 housed in the cover 21C and protruding portions 35 supported on both sides of the connecting portion 58 in the width direction. The two protrusions 35 formed on the lubricating member 18C are formed at both ends of the lubricating member 18C, in other words, at positions where the end portions of the leaf spring 32, that is, the tip sleeve portions 64 are inserted. As a result, the protrusion 35 can be strongly pressed by the leaf spring 32, so that the protrusion 35 can be reliably brought into contact with the engagement groove 47 of the roller 9. Further, when the protrusion 35 is formed small, the contact area of the lubricating member 18C with the roller 9 can be reduced, the friction of the lubricating member 18C with the roller 9 can be reduced, and the increase in rotational torque can be suppressed.

Next, a fourth embodiment of the table circulation guide device according to the present invention will be described with reference to FIGS. 14 (a), (b), (c) and (d). The fourth embodiment differs from the first embodiment in that the two lubricating members 18D are connected to form a gate shape having an integral structure. In the fourth embodiment, the configuration of the lubricator 4 provided on the carriage 6 is different from that in the first embodiment. Other configurations are the same. The lubricator 4 includes an opening 67 on the roller 9 side for accommodating a centrally located connecting portion 58 for fixing to the carriage 6 and a lubricating member 18D located on both sides of the connecting portion 58 in the width direction. It has a cover 21D composed of a portion 33 and a cover 21D. The connecting portion 58 is formed of, for example, the same material as the lubricating member 18D, and the connecting portion 58 can also be impregnated with the lubricant. The lubricant of the connecting portion 58 moves from the main body portion 25 to the protrusion 35 due to the capillary phenomenon, and the protrusion 35 can lubricate the roller 9. According to this, the lubricating member 18D of the fourth embodiment can hold a large amount of lubricant by the amount of the connecting portion 58, and the maintenance-free period can be extended.

Next, a fifth embodiment of the table circulation guide device according to the present invention will be described with reference to FIGS. 15 (a), (b), (c) and (d). FIG. 15 shows the lubrication device 4 in the fifth embodiment of the table circulation guide device according to the present invention. In the fifth embodiment, the configurations of the lubricating members 18E and the cover 21E of the lubricating device 4 provided on the carriage 6 are different from those in the first embodiment. Other configurations are the same. In the fifth embodiment, the protrusions 35 are provided over the entire axial lower end of the roller 9 of the lubricating member 18E, and only the lower end of the lubricating member 18E is formed so as to be pressed against the engaging groove 47 of the roller 9. Also by this, the lubricator 4 of the fifth embodiment can obtain the same effect as that of the first embodiment. In the fifth embodiment, the lubricator 4 is fastened together by using the mounting screw 15 that fixes the connecting plate 13 to the rotating shaft 10. With respect to FIG. 15, since the cover 21E accommodates the lubricating member 18E in the accommodating portion 33, the upper surface side of the cover 21E is formed large. The protrusion 35 of the lubricating member 18E is pushed into the engagement groove 47 of the roller 9 by the leaf spring 32, and the sliding contact surface 55 of the protrusion 35 slides into the rolling surface 54 of the engagement groove 47. Further, since the protrusion 35 of the lubricating member 18E comes into contact only at the position of the contact point on the outer peripheral surface of the roller 9, the contact area can be reduced, and the increase in rotational torque due to the provision of the lubricating member 18E on the roller 9 can be suppressed. it can.

When the table circulation guide device according to the present invention is operated in an environment where metal powders fly, for example, the metal powders may accumulate in the shape of the linear motor module 61, and the metal powders may adhere to the field magnet 65 which is a mover. is there. Therefore, as shown in FIGS. 16 and 17, a dustproof cover 71 that covers the linear motor module 61 and the field magnet 65 of the mover is attached. The dustproof cover 71 is made of, for example, a thin non-magnetized plate made of aluminum. The dustproof cover 71 can be screwed and fixed to a plurality of fixing members 66 provided in the table circulation guide device. Note that FIG. 16 is a cross-sectional view in which the description of the lubricator 4 is omitted. According to this, the accumulation of the metal powder on the linear motor module 61 and the adhesion of the metal powder to the field magnet 65 of the mover can be suppressed, and the metal powder can be used even in an environment where the metal powder dances. Further, the dustproof cover 71 is not limited to being made of aluminum, and can be formed of a non-magnetic material such as resin.

This table circulation guide device is preferably used for mounting equipment, workpieces, etc. of various devices such as an assembly device and an inspection device on a table and circling the table between a work area and a non-work area to perform work.

1 Table 2 Straight track rail 3 Curved track rail 4 Lubrication device 6 Carriage 7 Swing bearing (cross roller bearing)
8 Slider 9 Roller (carriage)
18A, 18B, 18C, 18D, 18E Lubrication member 21A, 21B, 21C, 21D, 21E Cover 23 End 30 Circumferential circuit 31 Bed 32 Leaf spring 33 Accommodation 34 Lubrication 35 Protrusion 46 Wedge-shaped protrusion 47 Engagement groove 50 Bottom surface 54 Rolling surface 55 Sliding contact surface 58 Connecting part 60 Linear motor type transfer system 67 Opening 68 Curved surface

Claims (8)

The bed is composed of a pair of linear track rails installed in the linear motion guide area on the bed and a curved track rail extending in an arc shape installed on the end side of the linear track rail installed in the bending guide area. In a table circulation guide device including a peripheral circuit, a table that circulates along the peripheral circuit, and a linear motor type transfer system that circulates and conveys the table on the peripheral circuit.
The circuit is configured as an infinite circulation path in which the table can be circulated by at least two pairs of the linear track rails and at least a pair of curved track rails installed on the end side of the straight track rails. Be done,
On the lower surface of the table, a plurality of sliders attached to both sides in the width direction traveling across the straight track rail and a pair of rollers arranged before and after the traveling direction traveling on the curved track rail, respectively. A pair of carriages that are mounted and located between the sliders are mounted.
A table circulation guide device characterized in that the carriage is provided with a pair of lubricators provided with lubricating members that are in sliding contact with the rolling surfaces of the pair of rollers to supply a lubricant. The table circulation guide device according to claim 1, wherein the lubricating member includes a protrusion having at least one sliding contact surface that is in sliding contact with the rolling surface of the roller. 2. The protrusion formed on the lubricating member is formed on the sliding contact surface curved along the outer peripheral surface which is the rolling surface of the roller provided on the carriage. The table circulation guide device described in. The table circulation guide device according to claim 2 or 3, wherein the lubrication device has a spring member that presses the protrusion of the lubrication member against the rolling surface of the roller to bring them into sliding contact with each other. The carriage is composed of a connecting plate rotatably attached to the table via a swivel bearing and a pair of rollers rotatably attached to the table so as to be spaced apart from each other in the width direction of the connecting plate. 1 to 4, wherein each of the wedge-shaped protrusions extending in the longitudinal direction on both sides of the curved track rail is provided with an engaging groove formed with the rolling surface that is slidably and slidably contacted with each other. The table circulation guide device according to any one of the above items. The lubrication device includes a centrally located connecting portion for fixing to the carriage and an accommodating portion having an opening on the roller side for accommodating the lubricating member located on both sides of the connecting portion in the width direction. The table circulation guide device according to any one of claims 1 to 5, wherein the spring member is arranged in the accommodating portion of the cover. .. The covers are provided so that the openings formed in the covers face each other with respect to the carriages arranged in the front and rear directions in the moving direction, and the rollers provided in the pair of carriages are paired with the covers. The table circulation guide device according to claim 6, wherein the table circulation guide device is covered with. 6. The lubricating member is composed of a connecting portion accommodated in the cover and a pair of lubricating portions provided with the protrusions supported on both sides of the connecting portion in the width direction, respectively. 7. The table circulation guide device according to 7.

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