KR950009979B1 - Rodless cylinder - Google Patents

Abstract

No content.

Description

Rodless cylinder

1 is a perspective view showing a rodless cylinder according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing the cylinder tube of the rodless cylinder shown in FIG.

3 is a vertical sectional view illustrating both a sliding table and a cylinder tube employed in the rodless cylinder shown in FIG.

4 is a perspective view showing a sliding table of the rodless cylinder shown in FIG.

5 is a perspective view showing a piston of the rodless cylinder shown in FIG.

6 is a perspective view showing the rodless cylinder shown in FIG.

FIG. 7 is a partially cutaway vertical sectional view illustrating a fitting manner of the first sealing member into the slit of the rodless cylinder shown in FIG.

8 is a vertical sectional view showing a rodless cylinder according to a second embodiment of the present invention.

9 is a vertical sectional view showing a rodless cylinder according to a third embodiment of the present invention.

10 is a vertical sectional view illustrating a rodless cylinder according to a fourth embodiment of the present invention.

11 is a vertical sectional view showing a rodless cylinder according to a fifth embodiment of the present invention.

FIG. 12 is a perspective view illustrating the rodless cylinder tube shown in FIG.

FIG. 13 is a vertical sectional view showing both a sliding table and a cylinder tube employed in the rodless cylinder shown in FIG.

14 is a perspective view showing a sliding table of the rodless cylinder shown in FIG.

FIG. 15 is a perspective view showing a piston of the rodless cylinder shown in FIG.

FIG. 16 is a vertical side cross-sectional view illustrating the rodless cylinder shown in FIG.

FIG. 17 is a partially cutaway vertical cross-sectional view showing a fitting manner of the first sealing member into the slit employed in the rodless cylinder shown in FIG.

18 is a vertical sectional view showing a rodless cylinder according to a sixth embodiment of the present invention.

19 is a vertical sectional view showing a rodless cylinder according to the seventh embodiment of the present invention.

20 is a vertical sectional view showing a rodless cylinder according to an eighth embodiment of the present invention.

21 is a vertical sectional view showing a rodless cylinder according to the ninth embodiment of the present invention.

22 is a vertical sectional view showing a rodless cylinder according to a tenth embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

10,100,200,300,400,500,520,530,550,570: Rodless Cylinder

12: cylinder body 14,103,204,414: sliding table

16,416 Bore 18,418,460 Slit

52,54,302,452,454,502,504,522,534,554,556,572,574

56a, 56b, 56c, 56d, 304a, 304b, 450a, 456b, 456c, 456d: Movable member (guide roller)

58a, 58b, 58c, 58d, 306a, 306b, 458a, 458b, 458c, 458d: Support member (rail-shaped member)

70,470: Piston 90,97,490,479: Sealing member

[Background of invention]

[Field of Invention]

According to the present invention, a loadless cylinder, more particularly, is disposed outside the cylinder, and a load acting on a sliding table that is displaced according to the reciprocating motion of the piston can be distributed and supported on the side of the cylinder so that the sliding table can be supported by the reciprocating motion of the piston. The present invention relates to a rodless cylinder which can move the cylinder smoothly and can more easily reduce the space occupied by the rodless cylinder.

[Related Technologies]

In recent years, rodless cylinders have been widely used as workpiece transfer devices in factories and the like.

The rodless cylinder is usually composed of a cylinder body and a sliding table having slits formed to extend along its longitudinal direction. The piston embedded in the cylinder body is provided integrally with the sliding table by the connecting member.

The rodless cylinder can be reduced in stroke compared to the cylinder to which the rod is connected. Therefore, the area occupied by the rodless cylinder is small, and the rodless cylinder is easy to operate. The rodless cylinder can also prevent dust from entering inside compared to the rod connecting cylinder described above. As a result, a high positioning action is possible.

Rodless cylinders of this type are disclosed, for example, in US Pat. No. 4,373,427 or in Federal Republic of Germany Patent 3,124,915. In particular, the rodless cylinders disclosed in Federal Republic of Germany Patent No. 3,124,915 are guides mounted on each leg which are formed in a given portion where the guide groove is located outside the cylinder tube and extend toward the given portion from the end of each sliding table. The member is configured to fit in each guide groove. According to the Federal Republic of Germany Patent No. 3,124,915, the guide member is supported against the guide groove so as not to increase the width of the slit when the lateral force is applied.

However, according to the Federal Republic of Germany Patent No. 3,124,915 each leg must be arranged to hold the guide member so as to extend towards a position spaced away from the outside of the cylinder as shown from the sliding table. Thus, when the guide member is fitted in the guide groove under the action of the lateral force, one end face of the cylinder tube forming the slit is forcibly approaching the other end face of the cylinder tube forming the slit on the opposite side. As a result, the inner diameter of the bore formed in the cylinder tube decreases as a whole and the piston is forcibly stopped operating. That is, the piston stops moving when a lateral force is applied. In other words, the workpiece transfer operation stops unexpectedly, thereby causing a problem that the workpiece that is held in engagement with the sliding table cannot be smoothly transferred.

[Overview of invention]

It is an object of the present invention to allow the piston to smoothly reciprocate the slide table without stopping it, as the bore's inner diameter can be prevented from changing even in the event of a horizontal force acting on the slide table.

According to a first aspect of the invention there is provided a cylinder body having a slit extending longitudinally with a bore formed in a closed cylinder tube, the slit allowing the bore to communicate outwardly, a reciprocating piston in the bore, and a slit. A pair of first and second sealing members, which are connected to the piston by a connecting portion extending through the piston, and are engaged with the piston and the sliding table to close the sliding table and the slit according to the reciprocating motion of the piston, An address cylinder comprising first and second retaining mechanisms is provided, the first and second retaining mechanisms being located on both sides of the bore and mounted to the cylinder body and the sliding table. Used to guide the sliding table during reciprocating movement and to support vertical loads acting on the sliding table. Each having a first supporting member and a first movable member, the second holding mechanism pair being capable of guiding the sliding table when the piston reciprocates and also acting on the sliding table to prevent a change in bore diameter. It has a 2nd support member and a 2nd movable member which can support a load, respectively.

The first support member and / or the second support member employed in the rodless cylinder can be used as a rail-shaped member extending along the longitudinal direction of the cylinder body. The first movable member and / or the second movable member employed in the rodless cylinder may be used as a rotatable body that rolls along the rail-shaped member.

At least one pair of rail-shaped members of the second holding mechanism pair may be provided on both side surfaces of the bore formed in the cylinder body. Furthermore, at least one pair of rotatable bodies of the second holding mechanism pair may be provided to remain in engagement with the pair of rail-like members toward the outside of the bore when the load acts on the sliding table.

It is also possible to have a member capable of adjusting the position of at least one rotatable body of the first holding mechanism and / or the second holding mechanism.

The positioning member may be composed of a rod for eccentrically supporting one rotatable body, a screw screw formed on the rod, and a nut held in engagement with the screw screw to fix the angular position of the rod with respect to the sliding table.

The first movable member and / or the second movable member can be used as a guide member extending along the longitudinal direction of the cylinder body. Moreover, the first support member and / or the second support member can be used as a synthetic resin member in which at least the guide member slides.

It is also possible to use the first movable member and / or the second movable member as a guide member extending along the longitudinal direction of the cylinder body. In addition, the first support member and / or the second support member can be used as a wear resistant surface treatment layer formed on at least a portion where the guide member slides.

According to a second specific aspect of the present invention, a cylinder body having a slit extending in a longitudinal direction with a bore formed in an end-closed cylinder tube, the bore communicating with the outside, a piston reciprocating in the bore within the bore, A pair of sliding tables connected to the piston by connecting portions extending through the slit and moving in accordance with the reciprocating motion of the piston, first and second sealing members engaged with the piston and the sliding table to close the slits; There is a rodless cylinder comprising first and second retaining mechanisms, respectively, which are mounted to the cylinder body and the sliding table and guide the sliding table when the piston reciprocates. Bore diameter as it can and also can support vertical and horizontal loads acting on the sliding table Avoid change, and the first pair of holding mechanisms least clouds and / or the position of the sliding portion is set to be far away from the slit toward the opposite side of the bore.

The second holding mechanism pair is provided to be held in engagement with the pair of rail-shaped members toward the outside of the bore when the load acts on the sliding table and at least one pair of rail-shaped members provided on both sides of the bore formed in the cylinder body. It may include at least a pair of rotatable bodies.

It is also possible to have a member that can adjust the position of at least one rotatable body of the first retaining mechanism and / or the second retaining mechanism along a direction intersecting the axial direction of one rotatable body.

The positioning member is used to support one rotatable body and the protrusion formed by the inner slit cut of the sliding table, and the width of the slit to adjust the position of the rotatable body along the direction crossing the axial direction. It may consist of a bolt threaded into the protrusion.

Further, the end of the sliding table extending in the direction crossing the sliding direction of the sliding table may be provided to project outward from the end of the cylinder body to surround the end of the cylinder body.

At least one position sensor may be mounted on the side surface of the cylinder body, and a drive member for exciting the position sensor may be attached to one end of the sliding table opposite to the position sensor.

The first holding mechanism and / or the second holding mechanism may include a wear-resistant portion in which the sliding surface and the sliding surface extend in the longitudinal direction of the cylinder body are in sliding contact.

At least the sliding surface and the wear resistant portions of the second holding mechanism may be provided on both sides of the bore formed in the cylinder body, and may be arranged to remain in engagement with each other toward the outside of the bore when a load is applied on the sliding table.

A member capable of adjusting the position of at least one of the wear-resistant portion or the sliding surface in sliding contact with the sliding surface may be provided.

Each positioning member is provided with either one sliding surface or one abrasion resistant portion and includes a protrusion formed by the inner slit cutting portion of the sliding table, and one sliding surface or one wear resistant portion by adjusting the width of the slit. It may include a bolt threaded into the protrusion to adjust either position.

Each positioning member includes a swing member formed at one end of one of the sliding surfaces or one of the wear resistant portions, and the other end of the swing member to pivot the swing member to adjust the position of either the sliding surface or the wear resistant portions. It may include a pressure screw screw coupled with.

The swing member may be mounted to a sliding table and may include a sliding surface provided at one end.

The first holding mechanism and the second holding mechanism may each be selectively provided with a rolling portion disposed on the opposite side of the portion supporting the load acting on the sliding table and a sliding portion provided on the opposite side of the other portions.

The above and other objects, features, and advantages of the present invention will become apparent from the following description and the appended claims in connection with the accompanying drawings, in which preferred embodiments of the present invention are shown by way of illustrative examples.

Detailed Description of the Preferred Embodiments

In FIG. 1, reference numeral 10 denotes a rodless cylinder according to the first embodiment of the present invention. The rodless cylinder 10 is composed of a cylinder body 12 and a sliding table 14. As shown in FIG. 3, the cylinder body 12 is suspended from the mounting wall surface 15 when in use. Moreover, the cylinder body 12 has a bore 16, which is formed in the cylinder body 12 and extends along the longitudinal direction of the cylinder body (see FIG. 2). The bore 16 communicates with the outside via a slit 18 formed on one end surface of the cylinder body 12. As shown in FIG. 3, the elongated grooves 20a to 20d on which the plurality of sensors are fitted to fit the at least one sensor in the cylinder body are formed in the side wall of the cylinder body 12 so as to extend along the longitudinal direction. . Similarly, fluid bypass passages 22a and 22b used for piping are also formed in the cylinder body 12 so as to extend along the longitudinal direction.

Referring to FIG. 3, the first concave portion 28 and the second concave portion 30 are formed under the long grooves 20b and 20d by cutting the angled portions or the corners of the cylinder body 12. The first side surfaces 32a, 32b of the first and second recesses 28, 30 are inclined slightly (some angle) in the opposite direction with respect to the horizontal direction. On the other hand, the second side surfaces 34a and 34b of the first and second recesses 28 and 30 are inclined at a predetermined angle (for example 45 °) in the opposite direction to the vertical direction. The slit 18 allows the bore 16 to communicate with the outside. The opposite side wall of the slit 18 includes steps 36a and 37b formed to open toward the bore 16.

Both ends of the cylinder body 12 having the structure as described above seal the pots 38a and 38b formed therein by the custom end caps 40a and 40b, respectively (see FIG. 1). Incidentally, reference numeral 42 in FIG. 3 denotes a sensor for detecting the position of the piston (described below) or the sliding table 14.

As shown in FIGS. 3 and 4, the sliding table 14 is relatively thick and has an inverted U-shaped plate 50. A pair of first holding mechanisms 52 which guide the sliding table 14 when the piston (described below) is reciprocated and support the load acting on the sliding table 14 to prevent the bore's inner diameter from changing. ) Is mounted on the corresponding arms 51a, 51b protruding upward from the transverse end of the plate 50 in FIG. 3, and the corresponding first and second recesses of the cylinder body 12. (28,30) is fitted in. On the other hand, the pair of second retaining mechanisms 54, which act in the same way as the pair of first retaining mechanisms 52, protrude upwards from the end extending across the plate 50 in FIG. It is mounted on the arms 51a and 51b and fits into the corresponding first and second recesses 28 and 30 of the cylinder body 12. While each of the pair of second holding mechanisms 54 can actually support a load acting vertically on each sliding table 14 of the pair of first holding mechanisms 52, It can support a load acting horizontally on the phase.

The pair of opposite first retaining mechanisms 52 are slightly inclined in the opposite direction to the horizontal direction (i.e., downward relative to the direction in which they approach each other as shown in FIG. 3) and the arm 51a, Rods 55a and 55b mounted on the corresponding opposite wall surfaces of 51b, guide rollers (first movable member) rotatably mounted on corresponding ends of the rods 55a and 55b, and guide rollers 56a and 56b. ) Includes rail-shaped members (first support members) 58a and 58b fixed to the corresponding first side surfaces 32a and 32b of the cylinder body 12 so as to roll along them.

Similarly, the pair of opposite second retaining mechanisms 54 are inclined 45 degrees in the direction opposite to each other with respect to the vertical direction and are fixed to the corresponding opposite wall surfaces of the arms 51a and 51b. , The corresponding second side surface of the cylinder body 12 so that the guide rollers (second movable member) rotatably mounted at the corresponding ends of the rods 55c and 55d and the guide rollers 56c and 56d roll along them. Rail-shaped members (second support members) 58c and 58d fixed to 34a and 34b, respectively.

The sliding table 14 is provided with the groove | channel 62 formed in the center part extended along a longitudinal direction. The groove 62 comprises an elliptical extending space 64 formed in the center. As is apparent from FIG. 4, the groove 62 has a recess 66 curved toward the lower surface 50a of the plate 50 of FIG. 3, which is provided on the opposite side to the cylinder body 12 side. It is.

As shown in FIG. 5, the piston 70 has a first pressure receiving surface 72 and a second pressure receiving surface 74 provided on a surface opposite the first pressure receiving surface 64. Moreover, the piston 70 is provided with buffer seals 76a and 76b (see also FIG. 6). The piston 70 includes belt separators 78a and 78b fixed to the yoke 80. The roller 84 is fixed to the piston yoke 80 by the coupler 82. The coupler 82 is oval shaped to fit within the space 64 of the sliding table 14. Thus, the sliding table 14 can be integrally moved with the piston 70 in the direction indicated by the arrow X with the sliding table 14 connected to the piston 70 by the coupler 82. Moreover, the sliding table 14 can be moved separately from the piston 70 in both the horizontal or lateral and vertical directions crossing the direction indicated by the arrow X. As shown in FIG. 6, scrapers 84a and 84b are provided inside the sliding table 14. The coupling 82 is fitted in a circular space 64 having a flat circular surface on the opposite side. Incidentally, reference numeral 86 in FIG. 6 denotes a passage through which the first sealing member described below enters the piston 70, and reference numeral 87 denotes a buffer amount.

The first sealing member fitted on the steps 36a, 36b will be illustrated in FIG. The first sealing member 90 has extensions 94a and 94b disposed above each of the tongue portions 92a and 92b and the tongue portions 92a and 92b. Furthermore, the first sealing member 90 has coupling portions 96a and 96b extending upward from the extensions 94a and 94b and is slightly open upward. Extension portions 94a and 94b are provided to engage with steps 36a and 36b when an internal pressure is applied to piston 70.

Moreover, the engaging portions 96a and 96b are held facing the corresponding inner surfaces 98a and 98b forming the slit 18. The first sealing member 90 is generally formed integrally with a flexible synthetic resin. On the other hand, the second sealing member 97 is used to close the slit 18 and is fitted in the opposite groove 99 formed in the cylinder body 12 and extending along the longitudinal direction. Incidentally, the first sealing member 90 enters into the passage 86 of the piston 70 and has both ends fixed to the end caps 40a and 40b together with the second sealing member 97.

Operation of the rodless cylinder 10 having the structure as described above will be described below.

After the cylinder body 12 is suspended by the mounting surface 15 as shown in FIG. 3, the workpiece W is first fixed to the lower surface 56a of the sliding table 14. When compressed air enters the pot 38a, it passes through a passage formed in the buffer ring 87 and is pressed against the first pressure receiving surface 72. The piston 70 is thus displaced to the left (in the direction indicated by arrow X) as shown in FIG. Moreover, the coupler 82 is fitted into the space 54 of the sliding table 14. Therefore, the sliding table 14 is integrally displaced to the left. At the same time, the belt separators 78a and 78b are operated such that the first and second sealing members 90 and 97 are spaced apart from each other between the sliding table 14 and the piston 70.

Thus, the workpiece W located on the sliding table 14 is transported to the left side as shown in FIG. When the compressed air enters the pot 38b, the action opposite to the above action is performed.

Incidentally, the roller 84 is in sliding contact with the second sealing member 97 during the transfer of the workpiece to facilitate the transfer of the workpiece.

Referring to FIG. 3, when the relatively heavy workpiece W is fixed above the sliding table 14, the vertical load F acts on the sliding table 14. As shown in FIG. Moreover, the horizontal load is likely to act on the arms 51a and 52b by the moment M. FIG. In this embodiment, the rail-shaped members 58a and 58b and the guide rollers 56a and 56b of the pair of first holding mechanisms 52 can accommodate the vertical load F effectively. Moreover, the rail-shaped members 58c and 58d and the guide rollers 56c and 56d constituting the pair of second holding mechanisms 54 inclined with respect to the vertical direction are loaded horizontally by the moment M. It can withstand or be able to accommodate surely. Here, the axes of the guide rollers 56a and 56b of the first holding mechanism 52 are inclined slightly downward with respect to the horizontal direction when viewed from the direction in which they approach each other. Therefore, the piston 70 can be displaced against the moment M acting on the sliding table 14 for example without widening the slit 18.

In addition, a pair of second holding mechanisms 54 are specially provided in this embodiment. Therefore, even when an unexpected load is applied to the sliding table 14 in the horizontal or lateral direction, for example, in the direction indicated by the arrow A in FIG. 3, the load is guided through the guide roller 56c. Can be supported by the rail-shaped member 58c to make it possible to reliably support the unexpected load. Thus, even when a sudden load is applied to the sliding table 14, it is possible for the piston 70 to avoid an outage due to a reduction in the bore's inner diameter as described in the prior art. Incidentally, the sensor detects the position of the piston 70 and the sliding table 14 by using a magnetic or similar detecting member, which is mounted directly to the arm 51b of the sliding table 14. .

The rodless cylinder 100 according to the second embodiment of the present invention will next be described with reference to FIG. Incidentally, the same reference numerals used for the rodless cylinders 10 according to the first embodiment represent elements of the same structure as those employed for the rodless cylinders 10 and will not be described in detail. The rodless cylinder 100 is composed of a cylinder tube 102 and a sliding table 103. The cylinder tube 102 has first recessed portions 104a and 104b formed on both sides and second recessed portions 106a and 106b formed on the lower surface. The rail-shaped members 58a and 58b are fixedly mounted to each of the first side surfaces 108a and 108b of the first recesses 104a and 104b, whereas the rail-shaped members 58c and 58d are the second recesses. It is fixedly attached to each of the second side surfaces 110a and 110b of the portions 106a and 106b.

The guide rollers 56a and 56b of the pair of first holding mechanisms 52 are supported by the corresponding arms 112a and 112b of the sliding table 103 with the axes of the guide rollers 56a and 56b facing in the horizontal direction. do. The guide rollers 56c and 56d of the pair of second holding mechanisms 54 are formed on the corresponding corners of the sliding table 103 with the respective axes of the guide rollers 56c and 56d inclined at a predetermined angle from the vertical direction. Is supported. The guide roller 56d is eccentrically supported by the rod 55d so as to be positionally adjustable in the radial direction. The rod 55d is provided with a nut 122 and a screw 120 that engage with the screw to fix the angular position against the sliding table. Incidentally, this position adjustment is not necessarily limited to the guide roller 56d. Positioning of the other guide rollers 56a to 56c can be performed selectively.

In the rodless cylinder 100 having the structure as described above, the workpiece W is fixedly mounted on the lower surface of the sliding table 103 after the cylinder tube 102 is suspended by the mounting wall surface 15. do. Thus, the rodless cylinder 100 is connected to the pairs 52 and 54 of the first and second holding mechanisms in a manner similar to the rodless cylinder 10 even though the load acts on the sliding table 103 along the vertical and horizontal directions. By reliably accommodating or supporting the load, the reciprocating motion of the piston 70 can be performed smoothly.

Incidentally, the guide rollers 56a, 56b of the pair of first holding mechanisms 52 can be inclined in a manner similar to that employed in the rodless cylinder 10 according to the first embodiment.

Moreover, the rodless cylinder 200 according to the third embodiment of the present invention will be described below with reference to FIG. Incidentally, the same reference numerals to be employed in the rodless cylinder 10 according to the first embodiment denote the same structural elements as those employed in the rodless cylinder 10 and will not be described in detail.

The rodless cylinder 200 is provided with a cylinder tube 202 and a sliding table 204. The sliding table 204 is movably positioned on the cylinder tube 202 when in use. The sliding table 204 is provided with the 1st recessed parts 206a and 206b formed in both sides. The cylinder tube 202 has first recesses 208a and 208b formed in the upper surface. The rail-shaped members 58a and 58b are fixedly mounted on the corresponding upper end surfaces 210a and 210b of the cylinder tube 202 corresponding to the first recesses 206a and 206b, respectively. On the other hand, the rail members 58c and 58d are fixedly mounted on the side surfaces 212a and 212b of the second recesses 208a and 208b, respectively.

The guide rollers 56a and 56b of the pair of first holding mechanisms 52 and the guide rollers 56c and 56d of the pair of second holding mechanisms 54 are supported on the corresponding corners of the sliding table 204. Each axis of the guide rollers 56a and 56b is inclined at a given angle with respect to the horizontal direction as necessary, while each axis of the guide rollers 56c and 56d is given an angle with respect to the vertical direction (for example, 45). Inclined to

Thus, the pairs 52 and 54 of the first and second holding mechanisms employed in the rodless cylinder 200 according to the third embodiment assure the load exerted on the sliding table 204 along the vertical and horizontal directions. Can be accommodated or supported. The rodless cylinder 206 may have the same advantages as obtained by the rodless cylinder 10.

Moreover, the rodless cylinder 300 according to the fourth embodiment of the present invention will be described below with reference to FIG. Incidentally, the same reference numerals as those employed in the rodless cylinders 200 according to the fourth embodiment refer to the structural elements as employed in the rodless cylinders 200, and the detailed description thereof will be omitted.

The rodless cylinder 300 according to the fourth embodiment is provided with a pair of second holding mechanisms 302 which are different from the pair of second holding mechanisms 54. The pair of second holding mechanisms 302 are fixed to the sliding table 204 and extend along the direction of movement of the pair of guide members (second movable members) 304a and 304b, and the cylinder tube 202. Synthetic resin member (second support member) 306a fixed to each of the side surfaces 212a, 212b of the second recesses 208a, 208b and capable of causing the pair of guide members 304a, 304b to slide along therein. , 306b). The synthetic resin members 306a and 306b are formed of a material having excellent sliding characteristics and high wear resistance. In the rodless cylinder 300, the guide members 304a and 304b may slide on the synthetic resin members 306a and 306b to smoothly move the sliding table 204. The pair of second holding mechanisms 302 are composed of guide members 304a and 304b and synthetic resin members 306a and 306b, respectively. However, a pair of first holding mechanisms 52 may also be formed of each of these components. As another alternative of the resin members 306a and 306b, the surface formed by the surface requiring the coating of the guide members 304a and 304b having a wear resistant surfacing layer, such as a resin film or a high aluminite film, is formed on the side surfaces 212a and 212b. Can be used to make sliding contact.

The description will now be made of a rodless cylinder 400 according to a fifth embodiment of the invention. As shown in FIG. 11, the rodless cylinder 400 includes a cylinder tube 412 and a sliding table 414. The cylinder tube 412 is formed in itself and has a bore 416 extending along its longitudinal direction. The bore 416 communicates outward through a slit 418 formed in its end surface.

As shown in FIG. 13, the cylinder tube 412 extends in the longitudinal direction and includes the long grooves 420a and 420b on which the sensor is mounted, and the long grooves 420c and 420d extending in the longitudinal direction and formed in the both sides. Equipped. Moreover, the cylinder tube 412 also has fluid bypass passages 422a and 422b formed in the cylinder 412 for piping to extend along the longitudinal direction in the same manner as described above.

The horizontally extending top surfaces 424a and 424b in FIG. 13 are provided at the upper portions of both ends of the cylinder tube 412. Furthermore, the first recess 428 and the second recess 430 are formed by cutting the spaced or inner ends of the upper surfaces 424a and 424b. Each side surface 432a, 432b of the first and second recesses 428, 430 is inclined at 45 degrees, for example in the opposite direction to the vertical direction. Slit 418 may communicate bore 416 with the outside as described above. However, the opposite side wall forming the slit 418 includes steps 436a and 436b that are configured to open towards the bore 416.

Both ends of the cylinder tube 412 having the structure as described above are hermetically closed by end caps 440a and 440b having pots 438a and 438b formed therein, respectively (see FIG. 11).

As shown in FIGS. 13 and 14, the sliding table 414 is relatively thick and includes an inverted U-shaped plate. Ends 446a and 446b extending laterally from the plate 444 protrude outward from the end of the cylinder tube 412. Moreover, the end surfaces 448a and 448b of the ends 446a and 446b are provided below from the upper surfaces 424a and 424b of the cylinder tube 412 to surround the ends of the cylinder tube 412, respectively. The magnetic sensor 450 (position sensor) for position detection of the sliding table 414 is attached to the elongate groove 420b formed in the side surface of the cylinder tube 412. Furthermore, a magnet 451 (drive member) or the like for operating the magnetic sensor 450 is mounted on the end 446b of the sliding table 414 on the opposite side to the magnetic sensor 450.

FIG. 13 shows a pair of guides that guide the sliding table 414 when the piston (described below) reciprocates and support the load applied to the sliding table 414 to prevent the bore 16 from changing its inner diameter. The first holding mechanism 452 is fitted to the lower surface of the sliding table 414 and mounted on the upper surfaces 424a and 424b. On the other hand, a pair of second holding mechanisms 454 acting in the same manner as the pair of first holding mechanisms 452 are provided on the lower surface of the sliding table 414 and the corresponding first and second recesses 428 and 430. Is fitted in. Each of the pair of first holding mechanisms 452 can actually support a load acting vertically on the sliding table 414, while each of the pair of second holding mechanisms 454 is horizontal on the sliding table 414. It can support the acting load.

The pair of first holding mechanisms 452 are rotatably mounted on the corresponding end ends of the rods 455a and 455b and the rods 455a and 455b securely mounted on the lower surface side of the sliding table 414 so as to extend in the horizontal direction. It includes a guide roller (456a, 456b) (rotating body) mounted, and a rail-shaped member fixed on the guide roller (456a, 456b). Each position of the rolling contact surface T (cloud position) between the guide roller 456a and the rail-shaped member 458a and also between the guide roller 456b and the rail-shaped member 458b is the position of the slit 418. Is set so as to be spaced apart by the distance H1 from the side facing the bore 416 side (upwardly as seen in FIG. 13). On the other hand, the respective end surfaces 448a and 448b of the sliding table 414 are downward from the respective rolling contact surface T by the distance H2 to prevent dust or the like from entering the rolling contact surface T laterally. Protrude or descend.

The pair of second holding mechanisms 454 are protrusions formed on the lower surface of the sliding table 414 so as to be inclined 45 degrees in the opposite direction to the vertical direction (ie, the direction in which the second holding mechanisms are spaced apart from each other in FIG. 13). 459a and 459b, rods 455c and 455d fixed to the corresponding protrusions 459a and 459b, guide rollers 456c and 456d rotatably mounted at corresponding ends of the rods 455c and 455d, and guide rollers ( And rail-shaped members 458c and 458d fixed on the corresponding side surfaces 423a and 423b of the cylinder tube 412 to roll the 456c and 456d, respectively. The protruding portion 459b forms a slit 460 cut into the sliding table 414. Each guide roller 456d can be adjusted positionally in the direction crossing each axis by tilting the bolt 461 from the upper surface of the sliding table 414 so that the bolt is threadedly coupled with the corresponding protrusion. .

The sliding table 414 has a groove 462 formed in the center portion and extending in the longitudinal direction. The groove 462 includes an elliptical enlarged space 464 formed at the center. As shown in FIG. 14, the groove 462 has a recess 466 curved toward the surface 444a of the plate 444 of FIG. 13 provided on the side opposite to the cylinder tube 412 side. have.

As shown in FIG. 15, the piston 70 has a first pressure receiving surface 472 and a second pressure receiving surface 472 provided on the side opposite the first pressure receiving surface 472. As shown in FIG. Further, the piston 470 is provided with buffer seals 476a and 476b (see also FIG. 16). Belt separators 478a and 478b mounted on the piston 470 are fixed to the piston yoke 480. The roller 484 is fixed at the position on the piston yoke 480 by the coupler 482. As shown in FIG. 6, scrapers 484a and 484b are provided inside the sliding table 414. As shown in FIG. Coupler 482 has a circular surface that is flat on the opposite side and is elliptical to fit in elliptical space 464. In addition, reference numeral 486 shown in FIG. 16 denotes a passage through which the first sealing member to be described later enters the piston 470, and reference numeral 487 denotes a buffer ring. The first sealing member fitted on steps 436a and 436b is shown in FIG. The first sealing member 490 has tongue portions 492a and 492b and extensions 494a and 494b disposed on the tongue portions, respectively. Further, the first sealing member 490 has engaging portions 496a and 496b extending outward from the corresponding extension portions 494a and 494b and slightly opening upwardly. Extensions 494a and 494b are provided to engage steps 436a and 436b when an internal pressure is applied to piston 470. Moreover, the engaging portions 496a and 496b are held against the corresponding inner surfaces 498a and 498b to form the slits 418. The first sealing member 490 is integrally formed of a flexible synthetic resin as a whole. On the other hand, the second sealing member 497 is used to close the slit 418 and is fitted into the opposite groove 499 extending along the longitudinal direction of the cylinder tube 412. Further, the first sealing member 490 enters the passage 486 of the piston 470 and has both ends fixed to the end caps 440a and 440b together with the second sealing member 497.

Operation of the rodless cylinder 400 configured as described above will be described below.

After the cylinder tube 412 is positioned as shown in FIG. 13, the workpiece (not shown) is first firmly mounted on the surface 444a of the sliding table 414. When compressed air is introduced from the pot 438a, the compressed air passes through a flow path or passage formed in the buffer ring 487 and is pressed against the first pressure receiving surface 472. Thus, the piston 470 is displaced to the left (ie, the direction indicated by arrow X) as shown in FIG. Moreover, coupler 482 fits into the space of sliding table 414. Therefore, the sliding table 414 is integrally displaced to the left. At this time, the belt separators 478a and 478b are operated such that the first sealing member 490 and the second sealing member 497 are spaced apart from each other. Thus, the workpiece placed on the sliding table 414 can be conveyed to the left side as shown in FIG. When compressed air is introduced into the pot 438b, an action opposite to the above action is performed.

In addition, the roller 484 is in sliding contact with the second sealing member 497 during the transfer of the workpiece in order to facilitate the transfer of the workpiece.

Referring to FIG. 13, if a relatively heavy workpiece is reliably placed on the sliding table 414, the vertical load F1 is applied to the sliding table 414. FIG. However, the vertical load F1 can be reliably received or supported by the guide rollers 456a and 456b and the rail-shaped members 458a and 458b of the pair of first holding mechanisms 452. Moreover, when an unexpected load F2 is applied horizontally to the sliding table 414, the load F2 is guide rollers 456c and 456d and a pair of second holding mechanisms, respectively, inclined at a predetermined angle with respect to the vertical direction. It is received reliably by the rail-shaped members 458c and 458d of 454.

At this time, the guide rollers 456c and 456d of the pair of second holding mechanisms 454 correspond to the outside of the bores 416 when the load F2 acts on the sliding table 414. ) Thus, even if a sudden load is applied to the sliding table 414, it is possible to avoid the situation that the inner diameter of the bore 416 is reduced to deactivate the piston 470 as in the prior art.

Furthermore, the respective positions of the rolling contact surface T between the guide roller 456a and the rail-shaped member 458a and also between the guide roller 456b and the rail-shaped member 458b are bores 416 from the slit 418. It is set so as to be spaced apart toward the other side (upper direction as seen in FIG. 13) on the side. Therefore, it is unnecessary to form an extension that protrudes largely against the sliding table 414 so that the guide rollers 456a and 456b protrude toward the bore 416. The entire sliding table 414 can be reliably thin and the shape of the sliding table 414 can be simplified.

The rodless cylinder 500 according to the sixth embodiment of the present invention will be described below with reference to FIG. In addition, the same reference numerals as those employed in the rodless cylinder 400 according to the fifth embodiment represent the same components as those employed in the rodless cylinder 400 and the description thereof will be omitted.

The rodless cylinder 500 includes a pair of first holding mechanisms 502 and a pair of second holding mechanisms 504. The pair of first holding mechanisms 502 are stepped synthetic resin members 506a and 506b (wear-resistant parts) fixed on the corresponding upper surfaces 424a and 424b of the cylinder tube 412, and respective corresponding synthetic resins 506a and 506b) and sliding surfaces 508a and 508b in sliding contact with each other. The position of each surface P (sliding part) on which the sliding surfaces 508a and 508b slide on the corresponding synthetic resin members 506a and 506b is the distance from the position S of the slit 418 to the opposite side toward the bore 16. It is set to be spaced apart by (H1).

The pair of second holding mechanisms 504 are formed of synthetic resin members 510a and 510b (wear-resistant parts) having an arcuate cross section firmly mounted on the corresponding side surfaces 432a and 432b of the cylinder tube 412, respectively. And arched sliding surfaces 512a and 512b in sliding contact with the corresponding synthetic resin members 510a and 510b. The synthetic resin members 506a, 506b, 510a, and 510b are formed of a material having excellent sliding characteristics and maximum wear resistance, respectively.

Thus, the pair of first and second retaining mechanisms 502, 504 of the rodless cylinder 500 are used as sliding bearings, respectively. The sliding surfaces 508a, 508b and 512a, 512b of the sliding table 414 can be slid on the corresponding synthetic resin members 506a, 506b and the corresponding synthetic resin members 510a, 510b to smoothly move the sliding table 414. have. As an alternative to the resin members 506a, 506b, 510a, 510b, the required portion of the sliding table 414 or the cylinder tube 412 may be covered with a wear resistant surface treatment layer such as a resin film or a hard alumite film.

Moreover, the rodless cylinder 520 according to the seventh embodiment of the present invention will be described with reference to FIG. In addition, the same reference numerals as those employed in the rodless cylinder 500 according to the sixth embodiment represent the same components as those employed in the rodless cylinder 500, and the description thereof will be omitted.

The rodless cylinder 520 has a pair of second holding mechanisms 522 with respect to the pair of first holding mechanisms 502. The pair of second holding mechanisms 522 are a synthetic resin member 510a fixed to the side surface 432a of the cylinder tube 412 and the sliding surface 512a in sliding contact with the synthetic resin member 510a, and the side surface ( 432b) and a synthetic resin member 510b fixed to the swing member 524 in sliding contact with the synthetic resin member 510, respectively.

The swing member 524 is swingably mounted to the sliding table 414 with respect to the spherical portion 524a. An arcuate sliding surface 526 in sliding contact with the synthetic resin member 510b is provided at one end of the swing member 524. The accommodation member 527 is held relative to the other end of the swing member 524. The receiving member 527 is engaged with the pressurizing screw thread 528 which is threadedly inserted into the sliding table 414 along the horizontal direction.

Therefore, the rodless cylinder 520 of the present invention may have the same advantages and effects as those obtained by the rodless cylinder 500 according to the sixth embodiment. In particular, one swing member 524 of the pair of second holding mechanisms 522 can swing relative to the spherical portion 524a under the pressure action of the pressure screw screw 428 and the position of the sliding surface 526 is synthetic resin. It can be adjusted freely with respect to the member 510b.

Moreover, the rodless cylinder 530 according to the eighth embodiment of the present invention will be described below with reference to FIG. In addition, the same reference numerals as those used for the rodless cylinder 400 according to the fifth embodiment and the rodless cylinder 500 according to the sixth embodiment are the same as those employed for the rodless cylinders 400 and 500. The components are shown and description thereof is omitted.

The rodless cylinder 530 includes a pair of first holding mechanisms 532 and a pair of second holding mechanisms 534. In particular, the pair of first holding mechanisms 532 are used to support the vertical load F3 acting on the sliding table 414 through the workpiece (not shown). Furthermore, the pair of first holding mechanisms 532 include a guide roller 456a and rail-shaped members 458a and 458b, respectively. A pair of second holding mechanisms 534 are used to guide the sliding table 414. Furthermore, the pair of second holding mechanisms 534 are fixed to the corresponding side surfaces 432a and 432b of the cylinder tube 412. It is used as a sliding bearing member each having an arcuate sliding surface 512a, 512b in sliding contact with a synthetic resin member having an arcuate cross section and corresponding synthetic resin members 510a, 510b.

In the rodless cylinder 530 configured as described above, guide rollers 456a and 456b and rail-shaped members 458a and 458b (ie, rolling parts) support the vertical load F3 applied to the sliding table 414. On the other hand, the resin member 510a, 510b and the sliding surfaces 512a, 512b (i.e., the sliding part) are selectively provided on the opposite side to the other part. Therefore, a relatively inexpensive sliding bearing used as a pair of second holding mechanisms including the synthetic resin members 510a and 510b and the sliding surfaces 512a and 512b, respectively, is a sliding table 414 that effectively supports the load applied to the sliding table 414. ) Can be used to move smoothly. Moreover, the rodless cylinder 530 can be easily reduced in cost as a whole.

The rodless cylinder 550 according to the ninth embodiment of the present invention will be described below with reference to FIG. In addition, the same reference numerals as those used for the rodless cylinder 400 according to the fifth embodiment and the rodless cylinder 500 according to the sixth embodiment are the same as those employed for the rodless cylinders 400 and 500. The components are shown and description thereof is omitted.

The rodless cylinder 550 has a cylinder tube 412 suspended by a member 552 extending horizontally, and a sliding table 414 on which a workpiece (not shown) is mounted and a vertical load F4 is applied downward. Equipped with. The pair of first holding mechanisms 554 and the pair of second holding mechanisms 556 are attached to the cylinder tube 412 and the sliding table 414. The pair of first holding mechanisms 554 has sliding surfaces 508a and 508b in sliding contact with the stepped synthetic resin members 506a and 506b and the corresponding synthetic resin members 506a and 506b, respectively. The pair of second holding mechanisms 556 include guide rollers 456c and 456d for supporting the vertical load F4 exerted on the sliding table 414 and rail-shaped members 458c and 458d, respectively.

Therefore, the rodless cylinder 550 is provided on the opposite side in position to the installation of the rodless cylinder 530 according to the eighth embodiment. Therefore, the rodless cylinder 550 can obtain the same effect as that obtained by the rodless cylinder 530 by using the sliding bearing used as a pair of 1st holding mechanism 554. As shown in FIG. Moreover, the following description will be made of a rodless cylinder according to the tenth embodiment of the present invention. In addition, the same reference numerals as those used in the rodless cylinder 400 and the cylinder 500 according to the fifth embodiment may be the same as those employed in the rodless cylinders 400 and 500. And detailed description thereof is omitted.

In the rodless cylinder 570, a workpiece (not shown) protruding from the load center is placed on the upper surface of the sliding table 414. The moment M therefore acts on the sliding table 414 by the vertical load F5 of the workpiece. For this purpose, the rodless cylinder 570 is provided with first and second holding mechanisms 572 and 574 for supporting or receiving the moment M. As shown in FIG.

Each first holding mechanism 572 has a rail-shaped member 458a positioned in opposing relationship with a guide roller 456a and a portion for holding or supporting the moment M. As shown in FIG. A relatively inexpensive sliding bearing (sliding portion) comprising a synthetic resin member 506b and a sliding surface 508b is provided on the opposite side to the rolling side. On the other hand, one of the second holding mechanisms 574 includes a rail forming member 458d provided to face the guide roller 456d and the portion for supporting the moment M. As shown in FIG. As another second holding mechanism 574, a relatively inexpensive sliding bearing (sliding portion) including a synthetic resin member 510a and a sliding surface 512a is provided on the opposite side to the rolling side.

Therefore, in the rodless cylinders 530, 550, 570, the rolling portions are arranged in a relationship facing the portion supporting the load acting on the sliding table 414. Moreover, the sliding bearing, which is a relatively inexpensive sliding part, is arranged opposite to the other parts. And the sliding table 414 can move smoothly without being affected by various loads. Moreover, the manufacturing cost of rodless cylinders can be significantly reduced.

Each rodless cylinder 530, 550, 570 is disclosed as the illustrated embodiment. The rolling part is provided in a relationship opposite to the part supporting the load acting on the sliding table 414, and the sliding part is other parts even when the sliding table 414 is moved vertically or the workpiece is mounted in a different state. If arranged in the opposite direction, the same effect as the advantageous effect obtained by the rodless cylinders 530, 550, 570 can be obtained.

According to the present invention, even if an excessive load is applied to the sliding table as described above, it is possible to reliably avoid the reduction in the inner diameter of the bore. Moreover, the sliding table and the piston can move smoothly without stopping. It is also possible to reliably avoid any reduction in the bore's inner diameter and to prevent the piston from stopping during the transfer of the workpiece to the desired position, even if unexpected axial forces are applied.

According to the invention the positions of the sliding and / or rolling portions of the pair of first holding mechanisms are set so as to be spaced apart from the slit on the opposite side of the bore. Therefore, the sliding table can be easily reduced in thickness, and the shape thereof can be simplified.

Having described the present invention in detail, those skilled in the art will appreciate that many modifications are possible without departing from the spirit and scope of the invention disclosed herein.

Claims (22)

A cylinder body having a bore formed in the cylinder tube with a closed end and a slit extending longitudinally and allowing the bore to communicate with the outside; A piston reciprocating in the bore; A sliding table connected to the piston by a connecting portion extending through the slit and moving according to the reciprocating motion of the piston; First and second sealing members coupled to the piston and the sliding table to close the slit; First and second holding mechanism pairs positioned on both sides of the bore and mounted to the cylinder body and the sliding table; And a member for adjusting the position of at least one of the first and second holding mechanism pairs, the first holding mechanism pair for guiding the sliding table when the piston reciprocates and on the sliding table. A first movable member and a first support member, respectively, for supporting a vertical load acting on the first load member; The second holding mechanism pair includes a second support member for guiding the sliding table when the piston reciprocates and for supporting a load acting on the sliding table to prevent the inner diameter of the bore from changing. And a second movable member, respectively. According to claim 1, wherein at least one of the pair of the first support member and the second support member is composed of a rail-shaped member extending along the longitudinal direction of the cylinder body, wherein the first movable member and the second movable And at least one of the member pairs comprises a rotatable body that rolls along the rail-shaped member. The at least one pair of rail-shaped members of the second holding mechanism pair are provided on both sides of the bore formed in the cylinder body, and the at least one pair of rotatable bodies of the second holding mechanism pair are loaded. And a rodless cylinder which, when acting on the sliding table, maintains engagement with the pair of rail-shaped members outwardly of the bore. The rodless cylinder according to claim 2, wherein the member for adjusting the position of at least one of the first and second bodies is composed of a member for adjusting the position of the second holding mechanism. 5. The apparatus of claim 4, wherein the member for adjusting the position of at least one of the first and second retaining mechanisms comprises: a rod eccentrically supporting the respective rotatable body and rotatable about an axis for adjustment; A screw thread formed on the rod; And a nut engaged with the screw screw to adjust the position of each rotatable body along an axial direction. According to claim 1, wherein at least one of the first movable member and the second movable member is composed of a guide member extending along the longitudinal direction of the cylinder body, at least one of the first support member and the second support member at least The rodless cylinder, characterized in that consisting of a synthetic resin member sliding the guide member. According to claim 1, wherein at least one of the first movable member and the second movable member is composed of a guide member extending along the longitudinal direction of the cylinder body, at least one of the first support member and the second support member A rodless cylinder comprising at least a wear-resistant surface treatment layer formed on a sliding portion of the guide member. 2. A rodless cylinder according to claim 1, wherein said holding mechanisms of each of said first and second holding mechanism pairs are spaced apart. 2. A rodless cylinder according to claim 1, wherein each holding mechanism of the first and second holding mechanism pairs is inclined in opposite directions to each other. 5. The rodless cylinder of claim 4, wherein the member for adjusting the position of at least one of the first and second bodies crosses the axial direction of the respective rotatable body. 11. The apparatus of claim 10, wherein said member for adjusting the position of at least one of said first and second bodies further comprises: a projection having a slit cut inward of said sliding table, said protrusion for supporting said respective rotatable body; And bolts inserted into the protrusions to adjust the width of the slit to adjust the position of each rotatable body along a direction intersecting the axial direction. The rod of claim 1, wherein the ends of the sliding table extending in a direction intersecting with the direction of movement of the sliding table are provided to protrude outwardly from the ends of the cylinder and to surround the ends of the cylinder body. Less cylinder. 13. A rod according to claim 12, wherein at least one position sensor is mounted on the side surface of the cylinder body and a drive member for actuating the position sensor is attached to one end of the sliding table in a direction opposite to the position sensor. Less cylinder. The method of claim 1, wherein at least one of the first holding mechanism and the second holding mechanism includes a sliding surface extending along the longitudinal direction of the cylinder body, wherein the sliding surface and the wear resistant portion are in sliding contact. A rodless cylinder characterized by the above-mentioned. 15. The outer surface of the bore according to claim 14, wherein at least the wear-resistant portion and the sliding surface of the second holding mechanism are provided on both sides of the bore formed in the cylinder body, and when a load is exerted on the sliding table. A rodless cylinder, characterized in that it is arranged to remain in engagement with one another towards a part. The rodless cylinder according to claim 14, further comprising a member for adjusting a position of at least one of the wear resistant portion and the sliding surface in sliding contact with the sliding surface. 17. The apparatus of claim 16, wherein the member for adjusting the position comprises: a protrusion provided at one of the sliding surfaces and the wear resistant portions and formed as a slit cut inward of the sliding table; And a bolt threadedly inserted into the projection to adjust the width of the slit to adjust the position of at least one of the sliding surface and the wear resistant portion. 17. The apparatus of claim 16, wherein the member for adjusting the position comprises: a swing member at one end of at least one of the sliding surface and the wear resistant portion; And a pressurizing screw screw engageable with the other end of the swing member to pivot the swing member to adjust the position of the sliding surface and the wear resistant portion. 19. The rodless cylinder of claim 18, wherein the swing member comprises a sliding surface mounted on the sliding table and provided at one end. The rodless cylinder according to claim 1, wherein the first holding mechanism and the second holding mechanism are selectively provided in opposing relations with a portion supporting a load acting on the sliding table. 2. The apparatus of claim 1, wherein the first holding mechanism pair is provided with a guide roller, and the axis of each of the guide rollers of the first holding mechanism pair is inclined with respect to a horizontal direction such that the piston does not widen the slit. A rodless cylinder characterized by being displaceable with respect to a moment acting on a sliding table. The rodless cylinder of claim 1, wherein at least one of the first and second holding mechanism pairs is comprised of the second holding mechanism pair.