JP3778217B2 - Actuator with slide table - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an actuator with a slide table in which a slide table is displaced along a linear guide rail by energizing the actuator.
[0002]
[Prior art]
For example, when a workpiece is sequentially conveyed from one predetermined position to the other predetermined position, an actuator with a slide table in which a slide table is connected to the actuator may be used.
[0003]
Various proposals have conventionally been made for this actuator with a slide table. For example, this kind of technical idea is disclosed in Japanese Utility Model Laid-Open No. 2-31902 and Japanese Utility Model Laid-Open No. 62-185905.
[0004]
In the Japanese Utility Model Laid-Open No. 2-31902, the piston rod is displaced by urging a cylinder disposed in the actuator body. In this case, one end of an L-shaped slide table is held at the tip of the piston rod, and a linear guide is provided between the actuator body and the slide table.
[0005]
On the other hand, in the Japanese Utility Model Laid-Open No. 62-185905, a double rod type in which a pair of brackets provided at both ends of an actuator body is connected to a piston rod is employed, and a slide table that substantially functions as a cylinder body is provided. A structure is disclosed in which the slide table is disposed on the upper surface of the actuator body and reciprocates between a pair of brackets along the rods.
[0006]
[Problems to be solved by the invention]
However, according to the technical idea disclosed in Japanese Utility Model Laid-Open No. 2-31902, when the amount of displacement of the slide table on which the work is mounted is increased, one end of the slide table is held at the tip of the piston rod. Therefore, there is a disadvantage that a load due to the weight of the workpiece and the slide table is applied to the slide table, and the deflection of the slide table increases.
[0007]
Further, according to the technical idea disclosed in the Japanese Utility Model Publication No. 62-185905, the slide table functions as a cylinder body in the double rod type. There is an inconvenience that the length becomes longer and the length of the slide table has to be increased accordingly. As a result, the installation location of the slide table is limited, and the space cannot be effectively used, and the manufacturing cost increases.
[0008]
The present invention was made to overcome the above disadvantages, and the length of the slide table in the longitudinal direction can be set to a predetermined length regardless of an increase in the amount of displacement of the slide table. Even if the displacement amount of the slide table increases, the slide table does not bend and has high rigidity, and the space can be effectively used without limiting the installation location, and the slide table can be manufactured at low cost. It is an object to provide an attached actuator.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has a pair of fluid pressure inlet / outlet ports , and a pair of cutouts having a substantially semicircular cross section extending in parallel along the axial direction are formed on the upper surface. Cylinder body,
The coupled so as extend along the pair of cutout portions axially central portion of the upper surface of the cylinder body be between, so that each of the guide grooves on opposite sides to extend in the axial direction A guide rail formed on
A slide table that has a flat rectangular parallelepiped shape and a side portion that is bent in a U-shaped cross section , and is displaced along the guide rail;
A pair of cylinder chambers are formed in the cylinder body on both sides of the guide rail, parallel to the axis of the guide rail and extending substantially horizontally with the set of notches. A set of pistons each slidably disposed in a set of cylinder chambers ;
The displacement of the said set piston at one end of which is connected to said pair of pistons, and a pair of piston rods displaced respectively along the pair of cutout portions,
An end plate having a U-shaped cross section that is provided at one end of the slide table and holds the tip of the pair of piston rods;
A set of ring members attached to the tip of the set of piston rods, sandwiching the lower end of the end plate, and sliding along the set of notches integrally with the end plate;
A plurality of guides that are provided between the guide rail and the side of the slide table along a substantially horizontal direction, and that guide the slide table along the guide rail by protrusions that engage with the guide grooves of the guide rail . A guide block;
A bolt that attaches the guide block to the slide table by screwing in from an external side surface of the slide table;
Equipped with a,
Said set of piston and piston rod, respectively, wherein arranged in a plurality of guide lower side of the block, the plurality of guide blocks, that you have been provided to each of the corners of the inner side of the slide table Features.
[0010]
[Action]
The actuator with the slide table according to the present invention, introducing a pressure fluid into a pair of cylinder chambers of the cylinder body through one of the fluid extrusion incoming port. The pressure fluid introduced into the set of cylinder chambers presses the set of pistons, whereby the piston rod is displaced along the set of notches. In this case, since the tip of the piston rod is held by an end plate provided at one end of the slide table via a pair of ring members, the slide table is also moved into the cylinder simultaneously with the displacement of the piston rod. Displaces in the body axis direction.
[0011]
The slide table is guided to a guide rail connected along an axial direction between a pair of cutout portions of the cylinder body and is displaced to the end of movement. Therefore, when the slide table is at one of the movement end positions, the load due to the weight of the workpiece and the slide table is directly applied to the cylinder body via the guide rail.
[0012]
【Example】
A preferred embodiment of the actuator with a slide table according to the present invention will be described below in detail with reference to the accompanying drawings.
[0013]
FIG. 1 is a partially broken perspective view showing an air cylinder with a slide table according to the present embodiment, and FIG. 2 is a cross-sectional view taken along line II-II shown in FIG.
[0014]
The air cylinder 10 with a slide table basically includes a rectangular cylinder body 12, a guide rail 14 integrally connected to the upper portion of the cylinder body 12, and a linear shape along the guide rail 14. And a slide table 16 that reciprocates. A pair of end blocks 18a and 18b are integrally connected to both end portions of the upper surface of the cylinder body 12, and a pair of adjustment knobs 20a and 20b for finely adjusting the displacement amount of the slide table 16 are connected to the end blocks 18a and 18b. Is provided.
[0015]
A pair of compressed air inlet / outlet ports 22a and 22b is defined on one side surface of the cylinder body 12 in the short direction, and a long groove 24 for sensor attachment is defined along the longitudinal direction. The cylinder body 12 is formed with a pair of notches 26a and 26b having a substantially semicircular cross section substantially parallel to the longitudinal direction thereof. Ring-shaped seal members 28a and 28b are provided at portions adjacent to each other in the longitudinal direction of the notches 26a and 26b, and cylinder chambers 30a and 30b closed by the seal members 28a and 28b are formed. The Pistons 32a and 32b are provided in the cylinder chambers 30a and 30b so as to be displaceable in the direction of the arrow X or Y. The front ends of the piston rods 34a and 34b connected to the pistons 32a and 32b are connected to an end plate 36 attached to the front end of the slide table 16 in the notches 26a and 26b. The piston rods 34a, 34b are connected by the end plate 36 by sandwiching the end plate 36 between a pair of ring members 38a, 38b fitted to the piston rods 34a, 34b. Ring-shaped magnets 40a and 40b are fitted on the outer peripheral portions of the pistons 32a and 32b via annular grooves, and a sensor (not shown) is mounted in the long groove 24 with the magnetic action of the magnets 40a and 40b. By detecting by this, the positions of the pistons 32a and 32b are detected. The one cylinder chamber 30a and the other cylinder chamber 30b are in communication with each other via a communication passage (not shown) as disclosed in Japanese Utility Model Laid-Open No. 62-185905, and the compressed air inlet / outlet port 22a, The compressed air supplied from 22b is introduced into the cylinder chambers 30a and 30b.
[0016]
The guide rail 14 is disposed over a predetermined length between the pair of end blocks 18 a and 18 b along the axis of the cylinder body 12. Guide grooves 42 having a substantially V-shaped cross section are defined on both side surfaces of the guide rail 14, and the slide table 16 is guided along the guide grooves 42.
[0017]
The slide table 16 is formed in a substantially U-shaped cross section, and four guide blocks 46 a to 46 d are mounted by bolts 44 that are screwed into positions facing the side surfaces of the guide rail 14. Two guide blocks 46 a to 46 d are arranged along both side surfaces of the guide rail 14, and the guide blocks 46 a to 46 d are formed with protrusions 48 that engage with the guide grooves 42. Further, a pair of shock absorbers 50a and 50b are provided at both ends in the axial direction of the slide table 16 so as to be separated from each other by a predetermined distance, so as to reduce the shock when colliding with one end block 18a (18b) at the end of movement. Yes. The slide table 16 and the end plate 36 are preferably integrally formed.
[0018]
The slide table-equipped air cylinder 10 according to the embodiment of the present invention is basically configured as described above. Next, the operation, action, and effect thereof will be described.
[0019]
By supplying compressed air from one compressed air inlet / outlet port 22a, the pistons 32a and 32b are pressed and displaced in the direction of the arrow X. When the pistons 32 a and 32 b are displaced, the slide table 16 is displaced via the piston rods 34 a and 34 b and the end plate 36. The slide table 16 is favorably displaced along the guide rail 14 via the guide blocks 46a to 46d.
[0020]
When the slide table 16 is displaced in the opposite direction, the slide table 16 is displaced in the arrow Y direction via the pistons 32a and 32b by supplying compressed air from the other compressed air inlet / outlet port 22b. be able to.
[0021]
In the air cylinder 10 with a slide table according to the present embodiment, the slide table 16 is supported by the guide rail 14 even when the slide table 16 is at one of the movement end positions. Therefore, most of the work mounted on the slide table 16 and the weight of the slide table 16 are directly applied to the cylinder body 12 via the guide rail 14. As a result, it is possible to prevent the slide table 16 from being bent and to obtain a highly rigid air cylinder 10 with a slide table.
[0022]
In the air cylinder with slide table 10 according to the present embodiment, the piston rods 34a and 34b are displaced by holding the end portions of the piston rods 34a and 34b with the end plate 36 integrally connected to the slide table 16. The amount is transmitted to the slide table 16. Therefore, the displacement amount of the slide table 16 is regulated by the displacement amount of each piston 32a (32b), and the displacement amount can be set regardless of the length of the slide table 16 in the longitudinal direction. As a result, even when the cylinder body 12 is extended along the axial direction to increase the amount of displacement of the slide table 16, the length of the slide table 16 is set to a predetermined length. As described above, since the displacement amount of the slide table 16 can be set regardless of the length of the slide table 16, the slide table 16 itself and the cylinder body 12 can be made more compact even when the displacement amount is increased. It is possible to manufacture. Accordingly, the air cylinder 10 with a slide table can be manufactured at a low cost, and the space can be effectively used without being limited to the installation place. Can be improved.
[0023]
Next, an air cylinder 60 with a slide table according to another embodiment of the present invention is shown in FIGS. The air cylinder 60 with a slide table according to the present embodiment is substantially the same in operation as the air cylinder 10 with a slide table shown in FIG. Only different points with reference numerals will be described below.
[0024]
This air cylinder 60 with a slide table has a cylinder body 62, and the cylinder body 62 is displaced from the axial direction to one side surface and extends along the axial direction from a substantially central portion to one end portion. 64 and a wide flat surface portion 66 adjacent to the bulging portion 64 are integrally formed (see FIG. 4). A plurality of mounting holes 68a to 68d are defined at an end portion along the longitudinal direction of the cylinder body 62 at a predetermined interval (see FIG. 3). Long grooves 70a and 70b for mounting a sensor (not shown) are formed on the upper surface of the bulging portion 64 so as to face each other in the longitudinal direction (see FIGS. 3 and 4).
[0025]
Furthermore, a cylinder chamber 30 having a substantially circular cross section in which the piston 32 is housed is defined inside the bulging portion 64, and the cylinder chamber 30 is airtightly closed by a pair of seal members 72 and 74. (See FIG. 5). A ring-shaped magnet 40 is fitted on the outer peripheral surface of the piston 32.
[0026]
A guide rail 14 is connected to the flat portion 66, and a slide table 76 is movably provided via guide blocks 46a to 46d that are in sliding contact with the guide rail 14. An end plate 78 is attached to one end portion of the slide table 76 along the longitudinal direction, and the end plate 78 is connected to the tip end portion of the piston rod 34 via a holding member 80 (see FIG. 3).
[0027]
In the air cylinder 10 with a slide table shown in FIG. 1, two pistons 32 a and 32 b are provided opposite to both sides of the cylinder body 12, whereas in the air cylinder 60 with a slide table according to the present embodiment, The difference is that one piston 32 is provided on one side of the side surface of the cylinder body 62. For this reason, only one notch 26 having a substantially semicircular cross section adjacent to the cylinder chamber 30 is formed (see FIGS. 3 and 5).
[0028]
In this case, as shown in FIG. 4, since the dimension A in the height direction from the flat surface portion 66 to the upper surface portion of the bulging portion 64 and the thickness B of the slide table are formed substantially the same, The upper surface portion of the bulging portion 64 and the upper surface portion of the slide table 76 are substantially flush. Therefore, in the air cylinder 60 with a slide table according to the present embodiment, the upper surface portion of the slide table 76 does not protrude from the upper surface portion of the cylinder body 62 and is substantially flush. It is possible to effectively use the space in the vertical direction, and it is possible to achieve a compact shape as a whole and to reduce the size and weight.
[0029]
【The invention's effect】
According to the actuator with a slide table according to the present invention, the following effects can be obtained.
[0030]
That is, even when the slide table is at the movement end position, the slide table is supported by the guide rail connected to the upper surface central portion along the axial direction of the cylinder body between the pair of notches . Since it is in a state, the slide table does not bend as in the conventional case, and a highly rigid actuator with a slide table can be formed.
[0031]
Further, in the actuator with a slide table according to the present invention, the distal end portion of a pair of parallel piston rods is held by an end plate provided on the slide table, so that the displacement amount of the piston rod is transmitted to the slide table. Yes. Therefore, the displacement amount of the slide table is regulated by the displacement amount of the piston, and the displacement amount can be set regardless of the length in the longitudinal direction of the slide table. As a result, even when the cylinder body is extended along the axial direction to increase the displacement amount of the slide table, the length of the slide table is set to a predetermined length.
[0032]
As described above, since the displacement amount of the slide table can be set regardless of the length of the slide table, the slide table itself and the cylinder body can be compactly manufactured even when the displacement amount is increased. It is. For this reason, the space can be used effectively without being limited to the installation location, and it can be manufactured at a low cost while having high rigidity, and further improving versatility by reducing the size and weight. It is possible to obtain an actuator with a slide table.
[Brief description of the drawings]
FIG. 1 is a partially broken perspective view showing an air cylinder with a slide table according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view taken along the line II-II shown in FIG.
FIG. 3 is a plan view showing an air cylinder with a slide table according to another embodiment of the present invention.
4 is a longitudinal sectional view taken along line IV-IV shown in FIG.
5 is a longitudinal sectional view taken along line VV shown in FIG.
[Explanation of symbols]
10, 60 ... Air cylinders with slide table 12, 62 ... Cylinder body 14 ... Guide rails 16, 76 ... Slide table 18a, 18b ... End blocks 22a, 22b ... Compressed air inlet / outlet ports 24, 70a, 70b ... Long grooves 26a, 26b, 26 ... Notches 28a, 28b, 72, 74 ... Seal members 30a, 30b, 30 ... Cylinder chambers 32a, 32b, 32 ... Pistons 34a, 34b, 34 ... Piston rods 36, 78 ... End plates 46a-46d ... Guide blocks 64 ... bulge part 66 ... flat part

Claims (1)

A cylinder body having a pair of fluid pressure inlet / outlet ports and having a pair of cutouts formed in a substantially semicircular cross section extending in parallel along the axial direction on the upper surface ;
The coupled so as extend along the pair of cutout portions axially central portion of the upper surface of the cylinder body be between, so that each of the guide grooves on opposite sides to extend in the axial direction A guide rail formed on
A slide table that has a flat rectangular parallelepiped shape and a side portion that bends in a U-shaped cross section , and is displaced along the guide rail;
A pair of cylinder chambers is formed in the cylinder body on both sides of the guide rail, parallel to the axis of the guide rail and extending substantially horizontally with the set of notches. A set of pistons each slidably disposed in a set of cylinder chambers ;
The displacement of the said set piston at one end of which is connected to said pair of pistons, and a pair of piston rods displaced respectively along the pair of cutout portions,
An end plate having a U-shaped cross section that is provided at one end of the slide table and holds the tip of the pair of piston rods;
A set of ring members attached to the tip of the set of piston rods, sandwiching the lower end of the end plate and sliding along the set of notches integrally with the end plate;
A plurality of guides that are provided between the guide rail and the side of the slide table along a substantially horizontal direction, and that guide the slide table along the guide rail by protrusions that engage with the guide grooves of the guide rail . A guide block;
A bolt that attaches the guide block to the slide table by screwing in from an external side surface of the slide table;
Equipped with a,
Said set of piston and piston rod, respectively, wherein arranged in a plurality of guide lower side of the block, the plurality of guide blocks, that you have been provided to each of the corners of the inner side of the slide table Characteristic actuator with slide table.

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