JP3755553B2 - Slide cylinder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fluid pressure actuator used in an industrial robot or the like, and more particularly to a slide cylinder in which a driven portion, which is one of the components, is slid by supply of fluid pressure. In this slide cylinder, a mounted object such as a workpiece or a tool is mounted on a driven part, and the driven part is reciprocated linearly by supplying fluid pressure to transfer the mounted object.
[0002]
[Prior art]
As shown in FIGS. 7 to 10, in the conventional slide cylinder, a cylinder (not shown) that linearly reciprocates the driven portion 51 along the guide means 52 by supplying compressed air is provided in the drive portion 53. On the other hand, a stopper 54 that regulates the movement end position of the driven portion 51 so as to be adjustable is bolted 55 to the outer side surface of the drive portion 53.
[0003]
Therefore, if it is assumed that a certain width w is required for the driven portion 51 formed in a table shape with a flat mounting surface for mounting the object to be mounted, the cylinder center line O ₁ and the stopper 54 The distance L with respect to the center line O ₂ is inevitably set to be large, and when the stopper receiver 56 provided in the driven portion 51 comes into contact with the stopper 54 on the drive portion 53 side during operation, the thrust of the cylinder is reduced. It acts on the guide means 52 as a large moment with the center of the stopper 54 as a fulcrum. Accordingly, when the stopper 54 is actuated, a moment in a direction significantly different from the original thrust direction of the cylinder acts on the guide means 52, and if the magnitude of this moment exceeds the allowable range of the guide means 52, the guide means 52 is moved to an early stage. There is a problem that the guide function is impaired due to damage.
[0004]
In the above-described conventional slide cylinder, the position detecting means 57 comprising a magnetic proximity switch that detects the position of the driven portion 51 and sends a signal to the outside is bolted 58 to the outer side surface opposite to the drive portion 53. In addition, there is a problem that the entire slide cylinder is enlarged.
[0005]
[Problems to be solved by the invention]
In the present invention, in view of the above points, when the stopper is operated, a moment in a direction significantly different from the original thrust direction of the cylinder does not act on the guide means, and the generated moment is small, so that the movement of the driven portion is accurate. An object of the present invention is to provide a slide cylinder capable of improving the durability of the guide means.
[0006]
In addition to this, an object of the present invention is to provide a slide cylinder that does not increase in size in spite of the fact that position detecting means for detecting the position of the driven portion side is provided.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a slide cylinder according to claim 1 of the present invention comprises a cylinder in a drive part, and a driven part connected to the drive part in an axial direction via a guide means is connected to compressed air. Is a slide cylinder that is displaced relative to the drive unit by forming a through hole in the axial direction of the drive unit adjacent to the cylinder and communicates with the through hole toward the driven unit. The driven hole is provided with a stopper that is axially displaceable at least at one end of the through hole, and the driven portion is provided with a stopper receiver penetrating from the long hole to the through hole. The movement end position of the part was regulated to be adjustable.
[0009]
In the slide cylinder according to claim 2 of the present invention, in the slide cylinder of claim 1 described above, the stopper is provided with position detecting means for detecting the position of the stopper receiver and sending a signal to the outside.
[0011]
The slide cylinder according to claim 1 of the present invention having the above configuration operates as follows.
[0012]
That is, the cylinder of the drive unit is operated by the supply and discharge of the compressed air, and accordingly, the driven unit is displaced along the guide means. When the stopper receiver provided in the driven portion comes into contact with the stopper provided in the through hole of the driving portion, the driven portion stops. At this time, a moment acts on the guide means by the thrust of the cylinder with the center of the stopper as a fulcrum, but the generated moment is small because the stopper is disposed adjacent to the cylinder. Further, since the stopper is built in the drive unit, the width of the guide means can be set wide by the space necessary for installing the stopper, and the performance of the guide means is improved.
[0013]
In addition to this, in the slide cylinder according to claim 2 of the present invention having the above-described configuration, the stopper is provided with position detecting means for detecting the position of the stopper receiver and sending a signal to the outside. There is no need to provide position detection means outside the drive unit.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. This embodiment is a common embodiment of the invention according to claim 1 or claim 2 of the present application.
[0015]
As shown in FIG. 1 to FIG. 6, the center line O _{1 of the} cylinder 3 that linearly reciprocates the driven portion 1 along the guide means 2 by the supply of compressed air and the movement end position of the driven portion 1 can be adjusted. The center line O ₂ of the stopper 4 is set to be adjacent to each other and parallel to each other in the same drive unit 5, so that the width w of the driven unit 1 having a table shape is large or small. not, the distance L between the center line O ₂ of the center line O ₁ and stopper 4 of the cylinder 3 is set smaller than conventional. As shown in FIG. 3 or FIG. 6, the drive unit 5 has a substantially convex shape when viewed from the axial direction, and is integrally provided with a lower wide portion 5a and an upper narrow portion 5b. The driven unit 1 having a substantially inverted concave shape is assembled to the drive unit 5 from above in the figure. The width of the drive unit 5 and the width L of the driven unit 1 are set to be approximately the same size. Also both the drawings in shown the slide cylinder as has a substantially symmetrical shape in its entirety to the left and right width of the center line O ₂ also drive unit 5 of the center line O ₁ and stopper 4 of the cylinder 3 Under the narrow part 5b, it arrange | positions substantially symmetrically right and left. The upper surface of the driven unit 1 in both figures is a flat mounting surface on which an object to be mounted such as a work or a tool is mounted.
[0016]
On both side surfaces of the narrow portion 5b of the drive portion 5 and both inner surfaces of the recess portion 1a of the driven portion 1 that opposes this, the round grooves 6 and 7 are formed in the axial direction so as to face each other and parallel to each other, The required number of balls 8 are interposed in the round grooves 6 and 7 to constitute the above-described guide means 2, and the driven part 1 is axially displaceable relative to the drive part 5 via the guide means 2. It is connected to. Usually, the inner walls of the round grooves 6 and 7 and the balls 8 are polished, and therefore, relative displacement with high accuracy is possible.
[0017]
Two through-holes 9 and 10 are formed in the drive unit 5 adjacent to each other and parallel to each other in the axial direction. The lower through-hole 9 in FIG. 5 constitutes the cylinder 3 and the upper through-hole 10. A stopper 4 is inserted in Two long holes 11 and 12 are formed in the surface on the driven part 1 side of the narrow part 5b of the driving part 5 and are formed adjacent to each other and parallel to each other in the axial direction. The other long hole 12 communicates with the other through hole 10 while communicating with the hole 9.
[0018]
Two shaft members (also referred to as connecting members) 13 and 14 are suspended on the drive unit 5 side of the driven unit 1 so as to be adjacent to each other and parallel to each other in a direction perpendicular to the axial direction. The other shaft member 14 reaches the other through hole 10 via the other long hole 12 while reaching the other through hole 9 via the one long hole 11. The other shaft member 14 operates as a stopper receiver.
[0019]
One through-hole 9 is closed at both ends by end members 15 and 16, respectively, and a pair of pistons 17 and 18 can move in the axial direction with one shaft member 13 interposed in the one through-hole 9. Is interpolated. Further, a pair of pressure chambers 19 and 20 are defined in one through hole 9 by the pair of pistons 17 and 18, and communicated with the pressure chambers 19 and 20 to the drive unit 5 as shown in FIG. A pair of piping ports 21 and 22 are provided. When compressed air is supplied to the piping port 21 on the left side of FIG. 1, this compressed air is introduced into the pressure chamber 19 on the left side of FIG. 5, and the pair of pistons 17 and 18 and one shaft member 13 simultaneously move to the right. The driven portion 1 that hangs down one shaft member 13 also moves rightward at the same time. When the compressed air is discharged and compressed air is supplied to the right piping port 22 in FIG. 1, the compressed air is introduced into the right pressure chamber 20 in FIG. 5, and the pair of pistons 17 and 18 and one shaft member are introduced. 13 simultaneously moves to the left, and the driven part 1 that hangs down one shaft member 13 also moves to the left simultaneously. Openings communicating with the through holes 9 and 10 are provided on the bottom surface of the drive unit 5 as long as compressed air is not released and the operation of the cylinder 3 is not hindered.
[0020]
Female screw members 23 and 24 are respectively screwed to both ends of the other through-hole 10, and pipe-like stoppers 4 having male screws on the outer peripheral surface are axially provided on the inner periphery of each of the female screw members 23 and 24. Screwed. The mounting position of the stopper 4 with respect to the female screw members 23 and 24 can be adjusted by changing the screwing amount. By adjusting the screwing amount, the movement terminal position of the driven portion 1 can be regulated to be adjustable. Yes. As described above, when the driven portion 1 moves to one side in the axial direction by the supply of compressed air, the stopper receiver, which is the other shaft member 14 suspended from the driven portion 1, simultaneously moves in the moving direction. Accordingly, it comes into contact with the tip of any one of the stoppers 4, whereby the other shaft member 14, the driven portion 1, the one shaft member 13 and the pair of pistons 17 and 18 are stopped simultaneously.
[0021]
Each pipe-shaped stopper 4 is provided with a position detection means 25 comprising a proximity sensor. When the stopper receiver as the other shaft member 14 comes into contact with the stopper 4, the position detection means 25 detects this. Send an electrical signal to the outside.
[0022]
In the slide cylinder having the above-described configuration, the center line O _{1 of the} cylinder 3 that linearly reciprocates the driven portion 1 along the guide means 2 by the supply of compressed air, and the movement end position of the driven portion 1 can be adjusted. Since the center line O ₂ of the stopper 4 that restricts the width of the stopper 4 is set to be adjacent to and parallel to each other within the same drive unit 5, the width w of the driven unit 1 having a table shape is not limited. not, it is possible to set smaller than the conventional distance L between the center line O ₂ of the center line O ₁ and stopper 4 of the cylinder 3. Therefore, when the stopper 4 is operated, the guide means 2 is not subjected to a moment in a direction significantly different from the original thrust direction of the cylinder 3, and the generated moment is small. The slide cylinder which can improve durability of 2 can be provided.
[0023]
In addition, since the stopper 4 is built in the drive unit 5, the width of the guide means 2 can be set wide as much as the space necessary for installing the stopper 4, and the support force is stabilized. Performance can be improved. In the above embodiment, a pair of stoppers 4 are provided in the axial direction so that the movement end position of the driven portion 1 is regulated to be adjustable at both ends in the axial direction. A configuration may be provided.
[0024]
Further, since the stopper 4 is provided with the position detecting means 25 for detecting the position of the stopper receiver and sending the signal to the outside, it is not necessary to provide the position detecting means outside the drive unit 5. Therefore, the entire slide cylinder can be reduced in size.
[0025]
【The invention's effect】
The present invention has the following effects.
[0026]
That is, first, Oite the slide cylinder by claim 1 of the present invention, during operation of the stopper does not act original thrust direction greatly different from the direction of the moment of the cylinder to the guide means, and because the moment generated is small In addition, it is possible to provide a slide cylinder in which the movement of the driven portion is accurate and the durability of the guide means can be improved.
[0027]
In addition, since the stopper is built in the drive unit, the width of the guide means can be set wide as much as the space necessary for installing the stopper, and the support force is stabilized, so the performance of the guide means is improved. be able to.
[0028]
In addition to this, in the slide cylinder according to claim 2 of the present invention, since the stopper is provided with position detecting means for detecting the position of the stopper receiver and sending a signal to the outside, it is provided outside the drive unit. There is no need to provide position detecting means. Therefore, the entire slide cylinder can be reduced in size.
[Brief description of the drawings]
1 is a front view of a slide cylinder according to an embodiment of the present invention. FIG. 2 is a plan view. FIG. 3 is a side view. FIG. 4 is a cross-sectional view taken along line AA in FIG. B-B cross-sectional view [FIG. 6] C-D-E-F cross-sectional view in FIG. 2 [FIG. 7] Front view of a conventional slide cylinder [FIG. 8] FIG. [Figure 10] Side view [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Driven part 1a Recessed part 2 Guide means 3 Cylinder 4 Stopper 5 Drive part 5a Wide part 5b Narrow part 6,7 Earl groove 8 Ball 9,10 Through hole 11,12 Long hole 13,14 Shaft member 15,16 End member 17 , 18 Pistons 19, 20 Pressure chambers 21, 22 Piping ports 23, 24 Female thread member 25 Position detecting means

Claims (2)

The driven part (1), which comprises the cylinder (3) in the drive part (5) and is connected to the drive part (5) through the guide means (2) so as to be axially movable, is supplied with compressed air. A slide cylinder relatively displaced with respect to the drive unit (5),
A through hole (10) is formed adjacent to the cylinder (3) in the axial direction of the drive unit (5) and communicates with the through hole (10) and opens to the driven unit (1). Forming a long hole (12),
A stopper (4) displaceable in the axial direction is provided on at least one end of the through hole (10),
By providing the follower part (1) with a stopper receiver penetrating from the elongated hole (12) to the through hole (10), the movement end position of the follower part (1) is regulated to be adjustable. A slide cylinder. The slide cylinder of claim 1 ,
A slide cylinder characterized in that the stopper (4) is provided with position detecting means (25) for detecting the position of the stopper receiver and sending a signal to the outside.

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