JP2005321016A - Cylinder device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem of the conventional cylinder device wherein no small-stroke cylinder device is operated over a long period of time and since a working medium is compressed air, a sealing means is required. <P>SOLUTION: This cylinder device includes: a plate-like fixing housing, both the upper and lower surfaces of which are substantially parallel; a plate-like movable housing elastically supported at an adjustable predetermined distance between the end faces opposite to the fixed housing; and a vacuum suction means disposed between the opposite faces of both housings, wherein at least one housing side is provided with a fluid passage communicated with the vacuum suction means. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a structure of a cylinder device, and more particularly to a cylinder device for a small stroke.

  Conventionally, there are various types of such cylinder devices, and a general piston system and a cylinder device using a diaphragm are known. In the case of the former piston type cylinder device, a movable member called a piston and a piston rod slides in the cylinder tube, and it is difficult to supply lubricating oil such as grease to the seal part (packing) and the sliding part. In addition, it is difficult to manufacture a small stroke structurally, and the sliding member and the sealing member of the sliding part are worn out, so that the service life is short, and the number of parts is structurally increased. However, there are many problems when it is used in an apparatus.

  The latter type of cylinder device has an advantage of high sealing performance, but has a problem that the movable diaphragm portion cannot withstand long-term operation. In addition, there is a design problem that the shape according to the application such as non-circularity cannot be easily adopted. In addition, since all use compressed air as a working fluid, there are many restrictions on use conditions such as the premise that a compressor or its compressed air piping exists.

Japanese Patent Publication No.62-365 JP-A-62-2967

  Therefore, in such a conventional cylinder device, there is no small stroke cylinder device that can be operated over a long period of time, and the working medium is compressed air as described above. There was also a common problem that it was necessary and the wear of the sliding part was large. The device of the present invention is intended to provide a cylinder device that achieves small stroke operation and positioning with a simpler structure by solving the above-described problems.

  The present invention provides a cylinder device that is capable of small stroke operation and positioning with a simpler structure that uses a suction pad that is not commercially available and that uses a suction pad with a small sliding portion. In this case, a fixed housing, a movable housing elastically supported with an adjustable distance between end faces facing the fixed housing, and a vacuum suction means are arranged between the two housings, and one housing side is arranged. A fluid passage communicating with the vacuum suction means is provided.

  Since the cylinder device of the present invention has few sliding parts, it can be operated for a long period of time, and since no compressed air is used for the operation, no sealing means is required, and the device can be simplified. Therefore, there is an advantage that the price can be reduced.

  The present invention relates to a cylinder device in which a commercially available vacuum suction pad is disposed between two members, a fixed housing and a movable housing, and the movable housing is operated by vacuum suction of air in the vacuum suction pad. Configured.

As can be seen from FIGS. 1 to 5, the device of the present invention is
A fixed housing 10 with a substantially parallel plane formed up and down, a movable housing 20 mounted on the fixed housing 10 with a substantially parallel plane formed up and down, and a vacuum disposed between the two housings 10 and 20. Adsorption means 30;
It comprises a limiting means 40 capable of adjusting the distance between the opposing end faces of the housings 10 and 20 to a predetermined distance, and an elastic means 50 stretched on the opposing end face sides of the housings 10 and 20. In the figure, 60 indicates a vacuum pump.

Further, details of the apparatus of this embodiment will be described.
As shown in FIGS. 1 to 5, the cylinder device of the present embodiment has a strip-shaped fixed housing 10 in which a substantially parallel plane is formed up and down, and an imaginary line (two points) in FIG. A long groove 11 having a predetermined depth is formed as indicated by a chain line, and there are a plurality of threaded holes 12 penetrating therethrough on both sides in the longitudinal direction (in this embodiment, two on the left side and one on the right side in the figure in total 3) Place) is formed. Inside the screw hole 12 position (between the long groove 11 and the screw hole 12), two bottomed holes 13 are formed on each of the left and right sides. Furthermore, a hole 14 is bored from one of the side surfaces of the fixed housing 10 toward the center, and the tip thereof extends to the middle of the elongated hole 11.
From there, the fluid passage is formed by opening to the bottom of the long groove 11.

   On the other hand, the movable housing 20 located at the upper part of the fixed housing 10 has a strip shape in which a substantially parallel plane is formed up and down like the fixed housing 10. A long groove 21 having an outer periphery smaller than the long groove 11 is formed, and a plurality of through holes 22 are provided at positions corresponding to the screw holes 12 of the movable housing 10 on both sides in the longitudinal direction (in this embodiment, two on the left side in the figure). The right side is formed in one place (total of 3 places). Further, counterbore holes 23 are formed. Inside the through hole 22 position (a position corresponding to the bottomed hole 13 of the movable housing 10 between the long groove 21 and the through hole 22), two similar bottomed holes 24 are formed on each of the left and right sides. .

  Among such housings, a base 31 a of a suction pad 31 having a shape as shown by a solid line in FIG. 4 is fitted in the elongated hole 21 of the movable housing 20, and is fixed to the movable housing 20 by two screws 32. . A skirt portion 31 b is formed subsequent to the base portion 31 a, and usually the tip of the skirt portion 31 b is in contact with the bottom surface of the long groove 11 of the fixed housing 10. Further, a bolt 41 as a limiting means 40 is screwed into the through hole 22 of the movable housing 20 and the screw hole of the fixed housing 10. At the position where the bolt 41 is screwed, the H amount shown in FIG. 1, that is, the distance between the opposing end faces of both housings, that is, the stroke of the cylinder device is determined. Further, the bottomed holes 13 and 24 of both housings are provided with coil springs 51 as elastic means 50, and the movable housing 20 is always pushed upward with respect to the fixed housing 10, that is, with spring pressure, as shown in FIG. . Further, as clearly shown in the drawing, the through holes 22 of the movable housing 20 into which the bolts 41 are fitted are equipped with bearings 42 at two of the three, which improves the operability and the assemblability. I am trying. Of course, bearings 42 may be mounted at all three locations.

   The operation of the cylinder device configured as described above will be described. FIG. 1 shows the stage before normal operation. When the vacuum pump 60 is turned on in this state, the air inside the skirt portion 31b of the suction pad 31 communicating with the hole 14 serving as a fluid passage and the hole 14 is sucked to the pump side, and the movable housing 20 is integrated. Moves downward, and its lower end surface comes into contact with the upper end surface of the fixed housing 10 to maintain this state. FIG. 5 shows the moved state. Then, when the vacuum pump 60 is turned off this time, the movable housing 20 returns to the state shown in FIG. 1 by the spring force of the elastic means 50. Since the upper and lower surfaces of both housings are formed in parallel, even if, for example, an object to be measured or a product is placed on the upper surface of the movable housing 20, it is moved by a predetermined amount without being displaced by operation. be able to.

   In the embodiment described above, the example in which the suction pad is mounted on the movable housing side has been described. However, the present invention is not limited to this, and the suction pad 300 is mounted on the fixed housing 100 side as shown in FIG. A corresponding long groove 201 may be provided on the 200 side. Further, the fluid passage 140 to the vacuum pump 600 may be provided on the fixed housing 100 side including the suction pad 300 as shown, or may be provided on the movable housing side if there is no problem in operation. Other restricting means and elastic means can be the same as those in the first embodiment.

   In addition to the shape shown in FIG. 4, there is no problem even if the suction pad has a circular shape that is generally commercially available. For example, as shown in FIG. Two of them can be used to communicate with each other in the skirt portion to the vacuum pump side. Of course, there may be two or more. In each of the embodiments, the fluid passage communicating with the vacuum pump is illustrated in one of the fixed housing and the movable housing. However, the fluid passage may be formed in both housings (not shown), and at least one of them may be formed. If it is formed, it can be implemented in the same manner.

   Furthermore, in the apparatus of the embodiment, the bolt is mounted as a stroke limiting member. However, when the cylinder stroke is constant and does not change, the threaded portion of the bolt is stepped, for example, and the stepped portion is fixed. By making contact with the upper surface side of the housing, an accurate stroke operation can be provided.

  In the cylinder device according to the present invention, the outer shape of the fixed housing and the movable housing may be any shape as long as the upper and lower surfaces are parallel, so if a slight stroke is required, for example, work at a certain position, It can be adopted when the position is slightly shifted, the position is slightly changed from the working position, or the position is shifted by 1 mm or 2 mm, or the movement is accurately performed by a small amount.

1 is a front sectional view of a cylinder device according to Embodiment 1 of the present invention. AA sectional drawing of FIG. 2 is shown. The BB sectional view of Drawing 1 is shown. The perspective view showing the positional relationship of the external appearance shape of the suction pad by Example 1, and a fixed housing is shown. FIG. 2 shows a front sectional view after the operation of the embodiment device according to FIG. 1; The front sectional view of the cylinder device by Example 2 is shown. The front sectional view of the cylinder device by Example 3 is shown.

Explanation of symbols

10 Fixed housing
DESCRIPTION OF SYMBOLS 20 Movable housing 30 Vacuum suction means 31 Adsorption pad 50 Elastic means 40 Limiting means 50 Elastic means 60 Vacuum pump

Claims (4)

  A flat plate-shaped fixed housing whose upper and lower surfaces are substantially parallel to each other, a flat plate-shaped movable housing whose upper and lower surfaces are elastically supported with an adjustable predetermined distance between end surfaces facing the fixed housing, and both housings face each other. A cylinder device in which a vacuum suction means is arranged between them and a fluid passage communicating with the vacuum suction means is provided on at least one housing side.   2. The cylinder device according to claim 1, wherein the vacuum suction means is a vacuum suction pad mounted on one housing side and a pad suction plane formed on the other housing side.   The vacuum suction pad is disposed on the movable housing side, a groove having a pad suction plane is formed on the fixed housing side, and a fluid passage communicating with the groove is formed on at least one housing side. The cylinder device according to claim 1 or 2.   The vacuum suction pad is disposed on the fixed housing side, a groove having a pad suction plane is formed on the movable housing side, and a fluid passage communicating with the groove is formed on at least one housing side. The cylinder device according to claim 1 or 2.

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