JP7337576B2 - Table circulation guide device - Google Patents

Description

The present invention relates to a table circulating guide device comprising a table that circulates and guides a circuit consisting of a linear guide rail and a curved track rail via a slider and a carriage with a lubricating device.

Conventionally, the table circulation guide device is configured so that the table circulates on track rails that form a circuit disposed on the bed. For example, the linear guide area is set as the work area, and the curved guide area is set as the non-work area. Normally, a table circulating guide device circulates objects such as workpieces and equipment placed on a table on a circuit, and machines the object in the work area of the linear guide area in the middle of the circuit. , are used to perform work such as assembly work.

Conventionally, as a table circulation guide device, a slider and a carriage are attached to a table. known to do. In the table circulation guide device, a circuit is formed in an endless circuit by straight track rails and curved track rails. Both end faces of the outer straight track rail and both end faces of the inner straight track rail of the circuit are installed on the bed so as to be displaced in the traveling direction of the table. The table is supported by two sliders on the outer linear track rail and by one slider on the inner linear track rail (see Patent Document 1, for example).

Also, in a component mounting apparatus using a linear motor, a plurality of bearing guides are described which are connected to the bottom of a moving beam and which roll and guide the moving beam. The bearing guide has a lubricating device that applies lubricant to the bearing and its outer peripheral surface. A lubricator is screwed to each bearing. Furthermore, the lubricating device is abutted against the outer peripheral surface of the bearing while being biased by a spring member (see, for example, Patent Document 2).

Also, a lubricating device for supplying lubricant to the outer peripheral surface of the cam follower is disclosed. The lubricating device is made of fine particles of high-density polyethylene resin, for example, powder with a fine particle size of 30 μm and a coarse particle size of 250 to 300 μm. A lubricating member obtained by impregnating a sintered resin member with a lubricant is used (see, for example, Patent Document 3).

WO2019/009105 JP 2012-146944 A Japanese Patent Application Laid-Open No. 2004-270876

The table circulation guide device disclosed in Patent Document 1 of the present applicant does not have a structure for supplying lubricant to the rollers of the carriage, and extends in the longitudinal direction on both sides provided on the curved track rail. The engagement grooves forming the rolling surfaces of the rollers are rotatably and slidably fitted into and supported by the wedge-shaped projections. Therefore, in the table circulation guide device, it is conceivable to apply a lubricant to the curved track rail in order to prevent abrasion of the wedge-shaped protrusion of the curved track rail due to the rolling of the rollers provided on the carriage. There is a problem that it is difficult to apply lubricant to the formed wedge-shaped protrusion extending in the longitudinal direction, and it is difficult to evenly apply the lubricant to the curved track rail. Moreover, the techniques disclosed in Patent Documents 2 and 3 have a problem that the installation work becomes complicated because a lubricating device is provided for each roller.

An object of the present invention is to solve the above problems, and in the table circulation guide device disclosed in WO2019/009105 pertaining to the present applicant, a wedge-shaped curved track rail is provided through a roller provided on a carriage fixed to the table. The carriage is provided with a lubricating device that has a porous sintered body lubricating member that can lubricate the rollers. Lubrication is applied to each roller. In addition to reducing the number of man-hours required to install the lubricating device to be supplied, the lubricant is always evenly applied to the rolling surface of the rollers, lubricating the wedge-shaped protrusions of the curved track rails on which the rollers roll through those rollers, and the wedge-shaped protrusions To provide a table circulation guide device characterized by preventing abrasion of rollers as well as parts.

The present invention comprises a bed, a pair of straight track rails installed in a linear guide area on the bed, and a curved track extending in an arc shape and installed at the end of the straight track rail installed in a curved guide area. a table circulating and moving along the circuit, and a linear motor type transfer system for circulating and conveying the table on the circuit,
The circuit is configured as an endless circuit in which the table can circulate by at least two pairs of straight track rails and at least one pair of curved track rails installed at the ends of the straight track rails. is
On the lower surface of the table, a plurality of sliders mounted on both sides in the width direction running across the straight track rail and a pair of rollers arranged in the running direction running on the curved track rail are respectively attached. a pair of carriages mounted between said sliders;
The table circulation guide device is characterized in that the carriage is provided with a pair of lubricating devices provided with lubricating members that are in slidable contact with the rolling surfaces of the pair of rollers to supply lubricant.

Also, the lubricating member has 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 protrusion of the lubricating member against the rolling surface of the roller to bring it into sliding contact.

The carriage comprises a connecting plate rotatably mounted on the table via a swivel bearing, and a pair of rollers rotatably mounted separately in the width direction of the connecting plate, The rollers are provided with engagement grooves formed with the rolling surfaces that slidably and slidably come into contact with wedge-shaped protrusions extending in the longitudinal direction on both sides of the curved track rail.

Further, the lubricating device includes a connecting portion located in the center for fixing to the carriage, and an accommodating housing provided with openings on the roller side for accommodating the lubricating members respectively positioned on both sides in the width direction of the connecting portion. and the spring member is arranged in the receiving portion of the cover. Further, the covers are provided so that the openings formed in the covers are opposed to the carriages respectively arranged in the forward and backward directions in the movement direction, and the rollers provided in the pair of carriages are arranged in a pair. covered by the cover.

Also, the lubricating member is composed of a pair of lubricating portions having a connecting portion accommodated in the cover and the protrusions supported on both sides in the width direction of the connecting portion.

In the table circulation guide device according to the present invention, as described above, the carriage is provided with a lubricating device that supplies lubricant to the pair of rollers, and the lubricating device contacts and slides on the rolling surfaces of the pair of rollers. Since it is equipped with a member, it is possible to reduce the number of man-hours for installing the lubricating device that supplies lubricant to the rolling surface of each roller. Lubricant can be evenly supplied to the wedge-shaped projection at all times, and the lubricating function can be improved to reduce friction and wear. That is, since this table circulation guide device can supply lubricant to a pair of rollers with one lubricating device, it is not necessary to provide a lubricating device for each roller. Therefore, compared with the conventional technology for attaching a lubricating device to each roller, it is possible to reduce the number of man-hours required to install the lubricating device. It is applied to the part of the track and can constantly supply lubricant to the curved track rail. In addition, since the lubricating device 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 lubricating device with a spring member that presses the projection of the lubricating member against the rolling surface of the roller, the sliding surface of the projection of the lubricating member is aligned with the engaging groove that constitutes the rolling surface of the roller. They can be brought into contact with each other reliably and slidably contacted. Furthermore, since the projections of the lubricating device are 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 projections and the roller becomes large and the mutual contact is ensured. The rollers can be in contact with each other, the amount of lubricant supplied to the rollers can be increased, and a good lubricating state can be achieved. The lubricating device can be configured, for example, by screwing a cover to the connecting plate so as to straddle the curved track rail and fixing the lubricating device to the carriage. In addition, when the roller rolling on the curved track rail rolls with its engagement groove supported by the wedge-shaped protrusion of the curved track rail, a protrusion with a sliding surface that is inserted into the engagement groove of the roller is formed in the lubricating member, the lubricant can be reliably and properly supplied to the engaging groove. The slider may be provided with a plate-shaped or sleeve-shaped well-known lubricating member. As a result, lubricant can be applied to the slider in addition to the rollers, 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 a device for circulating the table.

1 is a perspective view showing an embodiment of a table circulation guide device according to the present invention; FIG. 1. It is a perspective view which shows the state which attached the linear motor type conveyance system to the table circulation guide apparatus of FIG. 2 is a partially enlarged plan view showing a state in which a table is removed from the table circulation guide device of FIG. 1, a slider is straddled over linear track rails, and a carriage is straddled over linear guide rails. FIG. 2 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 between a linear track rail and a linear guide rail in the table circulation guide device of FIG. 1; FIG. 2 is an enlarged plan view showing a straight track rail, a straight guide rail, and a curved track rail at a boundary between a straight guide area and a curved guide area in FIG. 1; FIG. FIG. 4 is a perspective view showing a state in which the first embodiment of the lubricating device is attached to the carriage in this table circulation guide device; FIG. 7 is a perspective view showing a disassembled state of the lubricating device in the carriage having the lubricating device of FIG. 6 ; FIG. 8 is an enlarged sectional view showing the lubricating device of FIG. 7; FIG. 7 is a plan view showing a carriage with the lubricating device of FIG. 6; FIG. 9B is a partial cross-sectional view showing a carriage with a lubricating device at line segment AA of the carriage of FIG. 9(a); Figure 9(b) is a rear view of the carriage with the lubricating device of Figure 9(a); FIG. 4 is a schematic diagram illustrating a state in which the lubricating device is screwed to the carriage; FIG. 10 is a cross-sectional view showing a second embodiment of the lubricating device provided on the carriage in the table circulation guide device, showing a shape in which the protruding portion of the lubricating member in the lubricating device is formed into an R-curved surface. FIG. 11 is a perspective view of a carriage provided with a lubricating device according to a third embodiment of the table circulation guide device; FIG. 13 is an exploded perspective view of a lubricating device provided on the carriage of FIG. 12(a); FIG. 11 is a perspective view showing a disassembled state of a lubricating device according to a fourth embodiment of a carriage equipped with a lubricating device; FIG. 14 is a plan view showing a carriage with a lubricating device before being disassembled in FIG. 13(a); FIG. 13B is a cross-sectional view showing the carriage with the lubricating device taken along line CC in FIG. 13B; Fig. 13(b) is a rear view of the carriage with the lubrication device of Fig. 13(b); FIG. 11 is an exploded perspective view of a lubricating device in a carriage equipped with a lubricating device according to a fifth embodiment of the present invention; FIG. 15 is a plan view showing the carriage with the lubricating device before being disassembled in FIG. 14(a); FIG. 14B is a partial cross-sectional view showing the carriage with the lubricating device taken along line DD of FIG. 14(b); Figure 14(b) is a rear view of the carriage with the lubricating device of Figure 14(b); FIG. 11 is an exploded perspective view showing a disassembled state of a lubricating device of a sixth embodiment provided on a carriage in this table circulation guide device; Fig. 15(b) is a plan view showing the carriage with the lubricating device before being disassembled in Fig. 15(a); Figure 15(b) is a rear view of the carriage with the lubricating device of Figure 15(b); FIG. 15B is a cross-sectional view of the carriage with the lubricating device taken along line EE of FIG. 15(b); FIG. 2 is a perspective view showing a state in which a dustproof cover covering the entire table circulation guide device according to the present invention is provided; 1 is a plan view schematically showing a table circulation guide device according to the present invention; FIG. FIG. 18 is a cross-sectional view showing the state of the table circulation guide device of FIG.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a table circulation guide device according to the present invention will be described below with reference to the drawings. This table circulation guide device is characterized in that a lubricating device 4 is provided in the carriage 6 in the table circulation guide device disclosed in WO2019/009105 of the present applicant. The configuration of the curved track rail 3, slider 8, carriage 6, and linear motor type transfer system 60 is the one disclosed in the above publication.

First, with reference to FIGS. 1 to 5, the outline of the table circulation guide device according to the present invention will be described. 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. FIG. As shown in FIG. 2, this table circulation guide device employs a transport system 60 incorporating a movable magnet type linear motor as a driving means for circulating and transporting the table 1 on the 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 consists of a bed 31, a pair of linear track rails 2 fixed in a linear motion guide area which is a work area 28 on the bed 31, and a linear guide rail extending between them. 5 and a pair of curved track rails 3 fixed in a curved guide area that is a non-working area; It is composed of a linear motor type transport system 60 that circulates and transports. The straight track rail 2 has a pair of parallel and spaced apart pairs extending in the longitudinal direction. It extends in an arc shape. As shown in FIG. 6, the straight guide rail 5 is disposed between the straight track rails 2 and connected to both end portions 57 of the curved track rail 3 by the second connecting portions 27, respectively. The circulation circuit 30 is an endless 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 positioned at both ends thereof. is formed in Further, in this table circulation guide device, instead of the conveying system 60 containing the moving magnet type linear motor, for example, a belt-driven driving means can be used as the driving means. Also, the linear motor type transport system 60 has a . It is installed on a frame 40 that constitutes a support base 43 on the bed 31 .

In this table circulation guide device, as shown in FIG. The guide rails 5 and the curved track rails 3 connected to the straight guide rails 5 at both ends 23 of the straight track rails 2 form an endless circulation path in which the table 1 can circulate. Regarding the circulation circuit 30 in this table circulation guide device, in the first embodiment, the load mounted on the table 1 is installed outside the circulation circuit 30, and it is not necessarily limited to the illustrated one. Instead, the circuit disclosed in WO2019/009105 previously disclosed by the present applicant can be used. On the lower surface 50 of the table 1, as shown in FIG. 4, there are sliders 8 mounted on both sides in the width direction that run across the straight track rail 2, and a pair of rollers 9 on the curved track rail 3. A pair of carriages 6 are mounted on the sliders 8 so as to move forward and backward in the direction of travel. As shown in FIGS. 2 and 17(b), the linear motor type transfer system 60 includes a printed circuit board (not shown) consisting of a plurality of linear modules 61 and curved modules 62 installed along the circuit 30. ), and a field magnet 65 consisting of a plurality of permanent magnets positioned opposite the armature coils and supported by a support 59 on the table 1. It consists of a moving magnet type linear motor. As shown in FIG. 17(b), field magnets 65 made up of a plurality of permanent magnets are arranged adjacent to each other in the traveling direction of the table 1. As shown in FIG. An armature assembly 19 composed of a plurality of armature coils is arranged adjacently extending upward along the circuit 30 .

As shown in FIG. 4, this table circulation guide device has a linear motion guide unit composed of a slider 8 and a linear track rail 2. The slider 8 attached to the lower surface 50 of the table 1 is 2, a casing 37 having raceway grooves formed opposite to the raceway grooves formed on both side surfaces of a pair of linear track rails 2 and a return path extending parallel to the raceway grooves. End caps 48 provided on both end faces and formed with circular arc-shaped direction changing paths communicating between the raceway path formed between the raceway groove of the casing 37 and the raceway groove of the linear track rail 2 and the return path; It consists of an end seal 49 attached to the end face of an end cap 48, and rolling elements that roll in a circulation path consisting of a track path, a return path and a pair of direction change paths. This table circulation guide device has a bed 31 on the lower surface (see FIG. 4) or the upper surface (see FIG. A shim 14 for adjusting the height is arranged between them, and the height direction is set to a predetermined height. Since this table circulation guide device attaches the carriage 6 to the lower surface 50 of the table 1, in order to secure the space for arranging the carriage 6 under the table 1, the height of the lower surface of the linear track rail 2 is adjusted. The height of the circuit 30 is adjusted by disposing a shim 14 as a base. A groove 20 is formed in the shim 14 in the longitudinal direction for disposing the linear track rail 2 , and the groove 20 constitutes a mounting surface of the linear track rail 2 . A table 1 fixed to a slider 8 is supported on a linear track rail 2 and travels. 5, the end portion 57 of the linear track rail 2 is formed into a tapered taper 22 that gradually narrows, and the track groove formed in the casing 37 of the slider 8 is formed in the tapered shape. A gap is formed that gradually increases with respect to the gap, and the gap frees the rolling elements of the slider 8 at both ends of the straight track rail 2, so that the table 1 is smoothly converted to the curved track rail 3 by the carriage 6. and guided. It should be noted that the lubricating member 18A is not limited to this embodiment. Known lubricating members can also be applied.

When using the circuit 30 as shown in FIGS. 1 and 3, the slider 8 running on the straight track rail 2 outside the circuit 30 is Two sliders 8 are fixed to the table 1, and one of the sliders 8 running on the inner linear track rail 2 is fixed to the table 1, and is constructed so as to ensure stability against the unbalanced load applied to the table 1. there is That is, the various rails constituting the circuit 30 are composed of two sets of linear track rails 2, which are a pair of linear rails extending linearly on the bed 31, and linear guides of the linear rails respectively arranged between the linear track rails 2. It is composed of rails 5 and curved track rails 3 which are curved rails connected to both end surfaces of the linear guide rails 5, respectively. Further, between the pair of linear track rails 2, a linear guide rail 5, which is a single linear rail, extends parallel to the linear track rails 2 and is installed on each bed 31. As shown in FIG. Both ends 51 of the linear guide rail 5 are connected to ends 57 of the curved track rail 3 . As shown in FIG. 4, the linear guide rail 5 is provided with wedge-shaped projections 46 extending in the longitudinal direction on both side surfaces. Therefore, the wedge-shaped protruding portion 46 of the linear guide rail 5 is freed from the rollers 9 and does not support the load of the table 1, and is linearly guided through the pair of rollers 9 of the carriage 6. It is in a state where it straddles the rail 5. Therefore, while the table 1 is running on the linear track rail 2, the carriage 6 is in a state where it does not rotate on the linear guide rail 5. FIG. However, in this table circulation guide device, since the pair of rollers 9 of the carriage 6 straddles the linear guide rail 5, the carriage 6 moves from the linear guide rail 5 to the curved track rail 3 at the second connecting portion. 27 can be smoothly transitioned, and the table 1 can be smoothly guided through the circuit 30. FIG.

In addition, when the table 1 travels in the work area 28 on the straight track rail 2, as shown in FIG. While traveling supported by the straight track rail 2, and also, although not shown, when traveling in the non-working area 29 on the curved track rail 3, it is positioned between the sliders 8 attached to the table 1 and is in the direction of travel. It travels while being supported by the curved track rail 3 via a pair of carriages 6 provided in the front and rear. That is, if the rollers 9 and the sliders 8 of the carriage 6 are configured to function simultaneously, for example, when the height positions of the sliders 8 and rollers 9 deviate from the predetermined positions, the sliders 8 and rollers 9 move up and down. There is a possibility that the table 1 cannot be guided smoothly due to interference with each other. Therefore, in this table circulation guide device, the table 1 is reciprocated by the slider 8 along the linear track rail 2 in the linear rail region of the circuit 30, and the curved track rail 3 is moved in the curved rail region of the circuit 30. A carriage 6 guides and moves the table 1 along the path.

Further, as shown in FIG. 4, the carriage 6 is attached to the lower surface 50 of the table 1, and is installed at the front and rear of the table 1 in the direction of travel. It is attached to a fixed plate 12 that is freely fixed to the table 1 . Specifically, the carriage 6 includes a connecting plate 13 attached to the rotating shaft 10 of the swivel bearing 7 on the table 1 by means of a mounting screw 15, and a rotation support shaft attached to the connecting plate 13 in a spaced-apart manner in the width direction. It consists of a pair of rollers 9 rotatably attached to 11 . The rollers 9 are provided with engagement grooves 47 formed of concave grooves of V-shaped cross section extending in the circumferential direction and supported by wedge-shaped projections 46 extending in the longitudinal direction on both sides of the curved track rail 3 so as to be rotatably slidable. 4, the slewing bearing 7 includes an outer ring 16 fitted and fixed in 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 It is constructed as a cross roller bearing comprising cylindrical rollers 42 that roll between the outer ring 16 and the inner ring 17 . A rotating shaft 10 to which an inner ring 17 is fixed is attached to the connecting plate 13 by an attachment screw 15 .

In this table circulation guide device, when the table 1 runs on the curved track rail 3 of the curved rail, the slider 8 inside the circuit 30 is released from the straight track rail 2 and runs 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 does not participate in the travel of the table 1 . In addition, the slider 8 is of a type having a holding member (not shown) that holds the rolling elements in the casing 37 so as to prevent the rolling elements from falling out of the raceway grooves of the casing 37. is configured to The slider 8 attached to the lower surface 50 of the table 1 uses one inside and two outside of the linear track rail 2. The number of sliders 8 used is minimized, and the weight can be reduced. , the 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 lubricating device 4 having a pair of lubricating members 18 which are in sliding contact with the rolling surfaces 54 of the pair of rollers 9 to supply the lubricant. It is characterized by having First, a first embodiment of the lubricating 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. FIG. The lubricating device 4 has a leaf spring 32 which is a spring member for bringing the lubricating member 18A into contact with the rolling surface 54 of the roller 9. As shown in FIG. The leaf spring 32 is formed, for example, in a substantially V-shaped chevron shape, and the sleeve portions 64 at the tip thereof are inserted into the locking grooves 24 on both sides of the lubricating member 18A, respectively, so that the lubricating member 18A is sandwiched between the leaf springs 32, and the leaf spring 32 32 and the lubricating member 18A are integrated and attached to the cover 21A. 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 connecting plate 13 at intervals in the width direction thereof. It is configured. The rollers 9 are provided with engagement grooves 47 formed with rolling surfaces 54 that are rotatably and slidably supported by wedge-shaped projections 46 extending in the longitudinal direction on both sides of the curved track rail 3 . The plate spring 32 is disposed in the housing portion 33 of the cover 21A and presses the lubricating member 18A against the roller 9 to bring it into sliding contact. The projecting portion 35 has a sliding contact surface 55 formed on a wedge-shaped tapered surface.

As shown in FIGS. 7 and 8, the lubricating device 4 mainly includes a pair of lubricating members 18A that contact a pair of rollers 9 provided on the carriage 6, a cover 21A that houses the lubricating members 18A, and a pair of lubricating members 18A. It has a leaf spring 32 that is a spring member that presses against the In this table circulation guide device, an engagement groove 47 is formed on the outer peripheral surface of the roller 9 so that it can be engaged with the curved track rail 3, and the projection 35 of the lubrication member 18A is inserted into the engagement groove 47, It contacts and lubricates the rolling surface 54 of the roller 9 . The lubricating member 18A has a projection 35 that protrudes from the opening 67 of the cover 21A and comes into sliding contact with the rolling surface 54 of the roller 9. As shown in FIG. The lubricating member 18A has open pores prepared by filling a mold with fine particles of high-density polyethylene resin, for example, powder with a fine particle size of 30 μm and a coarse particle size of 250 to 300 μm, and pressurizing and heating to mold. A porous sintered resin member impregnated with a lubricant. Since the lubricating member 18A has a sliding contact surface 55 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 they can surely contact each other. , the amount of lubricant supplied to the roller 9 can be increased, and a good lubricating state can be achieved. In addition, the lubricating member 18A has a body portion 25 serving as a reservoir for lubricant and a protrusion 35 serving as an oil supply portion inserted into the engagement groove 47 of the roller 9 . At both ends of the lubricating member 18A, engaging projections 45 that engage with the engaging portions 44 of the cover 21 are provided. The lubricant impregnated in the lubricating member 18A moves from the main body 25 to the protrusion 35 by capillary action and is supplied to the roller 9. As shown in FIG.

FIGS. 9(a), (b) and (c) show a first embodiment in which the lubricating device 4 is attached to the carriage 6 in this table circulation guide device. The lubricating device 4 is composed of a cover 21A, a lubricating member 18A disposed in a housing portion 33 of the cover 21A, and a plate spring 32. As shown in FIG. 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 . At both ends of the cover 21A, accommodating portions 33 for the lubricating member 18A and the leaf spring 32 are formed. An engaging portion 44 (see FIG. 8) is formed on the inner surface of the containing portion 33 formed in the cover 21A to engage with the engaging projection 45 of the lubricating member 18A so as to prevent the contained lubricating member 18A from falling off. is configured to Holes 69 (four holes in FIG. 12) used during molding are provided at positions in the width direction of the cover 21A where the accommodating portions 33 are formed. When the cover 21A is injection-molded, a pin is arranged at the position of the hole 69 and the injection-molding is performed so that the cover 21A is not forcibly removed from the mold. In this table circulation guide device, the leaf spring 32 incorporated in the lubricating device 4 is formed in a substantially V shape. A pair of locking grooves 24 into which both ends of the leaf spring 32 can be locked are formed on the rear surface of the lubricating member 18A. The lubricating member 18A is pressed against the roller 9 by the elasticity of the plate spring 32. As shown in FIG. Note that the leaf spring 32 is not necessarily required as long as the lubricating member 18 can be brought into contact with the roller 9 . For example, as shown in FIGS. 9(a), (c) and 10, 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 to lubricate. Member 18A can be fixed to carriage 6 . Also, the sliding 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. As shown in FIG.

According to the first embodiment of this table circulation guide device, the protrusion 35 of the lubricating member 18A contacts the engagement groove 47 of the roller 9, and the lubricant can be supplied to the roller 9 through the protrusion 35. FIG. In addition, the lubricant can be supplied to the wedge-shaped projections 46 of the curved track rail 3 via the rollers 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, etc.), the lubricant can be supplied to the slider 8, and lubrication and maintenance-free operation of the device can be realized. In addition, hardening treatment such as quenching can be applied to the tapers 22 of the first connecting portions 26 located at both ends of the straight track rail 2 . As a result, it is possible to reduce the abrasion of the taper 22 of the first connecting portion 26 and the occurrence of flaking due to the impact when the slider is inserted into the first connecting portion 26. Running noise during insertion and removal can also be reduced. In addition, when using a curved track rail 3 made of carbonitrided chromium molybdenum steel with hard chromium plating to form a rust-preventive coating, the lubricant on the surface (rolling surface) of the curved track rail 3 is 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 protruding portion 46, which is the track surface of the curved track rail 3, may peel off. However, according to the present embodiment, since the lubricant can be applied to the entire curved track rail 3, peeling of the plating layer can be suppressed. In the first embodiment, the projection 35 of the lubricating member 18A is formed in a triangular shape matching the engagement groove 47 of the V groove of the roller 9. However, as shown in FIG. 47 can be formed in the R curved surface 70 which is easy to contact|abut.

Next, a second embodiment of this table circulation guide device will be described with reference to FIGS. 12(a) and 12(b). The second embodiment differs from the first embodiment only in the structure of the cover 21B of the lubricating device 4 provided on the carriage 6. Other configurations are the same. Since the carriage 6 has a structure in which a pair of rollers 9 revolves along the curved track rail 3, the centrifugal force during revolving may cause the lubricant to scatter around. In such a case, as shown in FIG. 12, only the protrusion 35 of the lubricating member 18B can be exposed, and the other portions can be covered with a cover 21B. The cover 21B is arranged with the openings 67 facing each other in the movement direction of the carriage 6 on the linear guide rail 5, and both side surfaces 36 of the cover 21B, the front and rear end surfaces 39 in the movement direction, and the upper surface 52 are formed on the wall surfaces. , thereby covering the rollers 9 of the carriage 6 with the pair of covers 21B facing each other. Moreover, since the roller 9 is covered with the cover 21B, it is possible to prevent the lubricant applied to the roller from scattering around due to the centrifugal force due to the rotation of the roller 9. The table circulation guide device of the second embodiment is suitable for applications 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. In the third embodiment, the lubrication member 18C in the first embodiment has only one protruding portion 35. The difference is that two protrusions 35 are formed on each lubricating member 18C. The third embodiment differs from the first embodiment only in the configuration of the lubricating device 4 provided on the carriage 6 . Other configurations are the same. The lubricating member 18C has two protrusions 35 which protrude from the opening 67 of the cover 21C and are in sliding contact with the rolling surfaces 54 of the rollers 9. The protrusions 35 are tapered wedge-shaped surfaces. It has a slidable contact surface 55 with a The lubricating member 18C is composed of a connecting portion 58 housed in the cover 21C and a pair of lubricating portions 34 having protrusions 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 ends of the leaf spring 32, that is, the tip sleeve portions 64 are inserted. As a result, the projection 35 can be strongly pressed by the plate spring 32, so that the projection 35 can be brought into contact with the engagement groove 47 of the roller 9 reliably. Also, if 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 to the roller 9 can be reduced, and the increase in rotational torque can be suppressed.

A fourth embodiment of the table circulation guide device according to the present invention will now be described with reference to FIGS. The fourth embodiment differs from the first embodiment in that the two lubricating members 18D are connected to each other to form an integral gate shape. The fourth embodiment differs from the first embodiment only in the structure of the lubricating device 4 provided on the carriage 6 . Other configurations are the same. The lubricating device 4 is provided with openings 67 on the side of the roller 9 for accommodating the lubricating members 18D positioned on both sides of the connecting portion 58 in the width direction of the connecting portion 58 located in the center for fixing to the carriage 6, respectively. It has a cover 21</b>D composed of a portion 33 . The connecting portion 58 is made of, for example, the same material as the lubricating member 18D, and the connecting portion 58 can also be impregnated with a lubricant. The lubricant in the connecting portion 58 moves from the main body portion 25 to the protrusion 35 by capillary action, and can be lubricated from the protrusion 35 to the roller 9 . According to this, the lubricating member 18D of the fourth embodiment can retain a large amount of lubricant by the amount corresponding to the connecting portion 58, and can extend the maintenance-free period.

Next, a fifth embodiment of the table circulation guide device according to the present invention will be described with reference to FIGS. FIG. 15 shows a lubricating device 4 in a fifth embodiment of the table circulation guide device according to the present invention. The fifth embodiment differs from the first embodiment only in the structure of the lubricating member 18E and the cover 21E of the lubricating device 4 provided on the carriage 6. Other configurations are the same. In the fifth embodiment, the protruding portion 35 is 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 press against the engagement groove 47 of the roller 9. FIG. This also allows the lubricating device 4 of the fifth embodiment to obtain the same effects as those of the first embodiment. The fifth embodiment is an example in which the lubricating device 4 is tightened together using the mounting screw 15 for fixing the connecting plate 13 to the rotary shaft 10. FIG. In FIG. 15, the cover 21E has a large upper surface side in order to accommodate the lubricating member 18E in the accommodation portion 33. As shown in FIG. The protrusion 35 of the lubricating member 18E is pushed into the engagement groove 47 of the roller 9 by the plate spring 32, and the sliding contact surface 55 of the protrusion 35 is brought into sliding contact with the rolling surface 54 of the engagement groove 47. As shown in FIG. In addition, since the protrusion 35 of the lubricating member 18E contacts only 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. can.

When the table circulation guide device according to the present invention is operated in an environment where, for example, metal powder flies, the metal powder may accumulate in the shape of the linear motor module 61, and the metal powder may adhere to the field magnet 65, which is the mover. be. Therefore, as shown in FIGS. 16 and 17, a dustproof cover 71 is attached to cover the linear motor module 61 and the field magnet 65 of the mover. The dustproof cover 71 is made of, for example, a non-magnetizable thin plate made of aluminum. The dustproof cover 71 can be fixed by screwing it to a plurality of fixing members 66 provided on the table circulation guide device. 16 is a cross-sectional view in which the illustration of the lubricating device 4 is omitted. According to this, deposition of metal powder on the linear motor module 61 and adhesion of metal powder on the field magnet 65 of the mover can be suppressed, and the apparatus can be used in an environment where metal powder flies. Further, the dustproof cover 71 is not limited to being made of aluminum, and can be made of a non-magnetic material such as resin.

This table circulating guide device is preferably used in a device in which devices for various devices such as an assembly device and an inspection device, works, etc. are mounted on a table and work is performed by rotating the table between a working area and a non-working area.

REFERENCE SIGNS LIST 1 table 2 straight track rail 3 curved track rail 4 lubricating device 6 carriage 7 turning bearing (cross roller bearing)
8 slider 9 roller (carriage)
18A, 18B, 18C, 18D, 18E lubricating member 21A, 21B, 21C, 21D, 21E cover 23 end 30 circuit 31 bed 32 leaf spring 33 accommodating portion 34 lubricating portion 35 projection 46 wedge-shaped projection 47 engagement groove 50 Lower surface 54 Rolling surface 55 Sliding contact surface 58 Connecting portion 60 Linear motor transport system 67 Opening 68 Curved surface

Claims (6)

Composed of a bed, a pair of straight track rails installed in a linear motion guide area on the bed, and a curved track rail extending in an arc shape and installed on the end side of the straight track rail installed in a curved motion guide area A table circulating guide device comprising a circular circuit, a table that circulates along the circular circuit, and a linear motor type transfer system that circulates and conveys the table on the circular circuit,
The circuit is configured as an endless circuit in which the table can circulate by at least two pairs of straight track rails and at least one pair of curved track rails installed at the ends of the straight track rails. is
On the lower surface of the table, a plurality of sliders mounted on both sides in the width direction running across the straight track rail and a pair of rollers arranged in the running direction running on the curved track rail are respectively attached. a pair of carriages mounted between said sliders;
The carriage is provided with a pair of lubricating devices having lubricating members that are in sliding contact with the rolling surfaces of the pair of rollers and supply lubricant ,
The lubricating device is
a spring member that presses the lubricating member against the rolling surface of the roller for sliding contact;
a connecting portion located in the center for fixing the lubricating device to the carriage; and accommodating portions having openings on the roller side for accommodating the lubricating members respectively positioned on both sides in the width direction of the connecting portion. a cover constructed from
The table circulation guide device , wherein the spring member is arranged in the accommodating portion of the cover . 2. The table circulation guide device according to claim 1, wherein said lubricating member has a protrusion having at least one sliding contact surface which is in sliding contact with said rolling surface of said 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 1. The carriage comprises a connecting plate rotatably mounted on the table via a swivel bearing, and a pair of rollers rotatably mounted spaced apart in the width direction of the connecting plate. is provided with engagement grooves in which the rolling surfaces are formed so as to slidably contact the wedge-shaped protrusions extending in the longitudinal direction on both sides of the curved track rail so as to be rotatably slidable . The table circulation guide device according to any one of 1. The covers are provided so that the openings formed in the covers are opposed to the carriages respectively arranged in the forward and backward directions in the movement direction, and the rollers provided in the pair of the carriages are arranged in the pair of the covers. 2. The table circulation guide device according to claim 1 , wherein the table circulation guide device is covered with a 3. The lubricating member comprises a pair of lubricating parts having a connecting part accommodated in the cover and the protrusions supported on both sides of the connecting part in the width direction. A table circulation guide device as described.

Images