JPH0636709U - Fluid pressure chuck device - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] The present invention relates to a fluid pressure chuck device for holding a held member by deforming a thin-walled tubular body by fluid pressure, and to quickly and reliably hold the held member on the thin-walled tubular body. It is intended to be inserted or fitted. [Structure] A held object to be inserted or fitted inside or outside the thin-walled tubular body by applying fluid pressure to the outside or inside of the thin-walled tubular body to reduce or expand the diameter of the thin-walled tubular body. In a fluid pressure chuck device for holding a member, a plurality of fluid ejection holes or fluid suction holes are provided on the held member side of the thin tubular body.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fluid pressure chuck device for holding a member to be held by deforming a thin-walled tubular body by fluid pressure.

[0002]

[Prior art]

 Conventionally, a held member that is inserted or fitted inside or outside the thin-walled tubular body by applying fluid pressure to the outside or inside of the thin-walled tubular body to reduce or expand the diameter of the thin-walled tubular body. As a fluid pressure chuck device for holding the above, those disclosed in, for example, JP-B-45-29346, JP-B-47-5198 and JP-B-63-50123 are known.

[0003]

[Problems to be solved by the device]

 However, in such a conventional fluid pressure chuck device, for example, fluid pressure is applied to a thin-walled tubular body made of metal, and the thin-walled tubular body is contracted or expanded in diameter by elastic deformation of the thin-walled tubular body. Therefore, the amount of diameter reduction or the amount of diameter expansion is relatively small, and therefore the gap between the thin-walled tubular body and the held member that is inserted or fitted inside or outside the thin-walled tubular body should be increased. Since it is difficult and the gap is narrow, there is a problem that it is difficult to quickly and surely insert or fit the held member into the thin-walled tubular body.

In particular, when attempting to automatically insert or fit the held member into the thin-walled tubular body, it is necessary to position and move the held member with respect to the thin-walled tubular body with high accuracy. There has been a problem that a robot hand or the like that moves the held member requires high accuracy.

The present invention has been made to solve the conventional problems, and provides a fluid pressure chuck device capable of quickly and reliably inserting or fitting a held member into a thin cylindrical body. With the goal.

[0006]

[Means for Solving the Problems]

 The fluid pressure chuck device according to the present invention is configured such that fluid pressure is applied to the outside or inside of the thin-walled tubular body to reduce or expand the diameter of the thin-walled tubular body, and the inside or outside of the thin-walled tubular body is In a fluid pressure chuck device for holding a held member to be inserted into or fitted in, a plurality of fluid ejection holes or fluid suction holes are provided on the held member side of the thin tubular body.

[0007]

[Action]

 In the fluid pressure chuck device of the present invention, when the held member is inserted into or fitted into the thin-walled tubular body, for example, air is ejected from the plurality of fluid ejection holes to be inserted into or fitted into the thin-walled tubular body. The held member is put in a floating state.

Alternatively, when the held member is inserted into or fitted into the thin-walled tubular body, for example, air is sucked from the plurality of fluid suction holes, and the held member is inserted or fitted into the thin-walled tubular body. Is in a floating state.

[0009]

【Example】

 Hereinafter, the details of the present invention will be described with reference to the embodiments shown in the drawings. FIG. 1 shows an embodiment of the fluid pressure chuck device of the present invention. In this embodiment, the thin-walled tubular body 11 is reduced in diameter by hydraulic pressure and inserted into the thin-walled tubular body 11, for example. A held member 13 such as a tool, a work, or a product is held.

The fluid pressure chuck device of this embodiment is mainly composed of a chuck portion A for accommodating the thin-walled tubular body 11 and an operating portion B for supplying hydraulic pressure to the thin-walled tubular body 11. ing.

In the figure, reference numeral 15 indicates an apparatus main body, and a holding portion 17, a flange portion 19 and a piston portion 21 are integrally formed on the apparatus main body 15 in order from the held member 13 side.

An intermediate cylinder 23 is fitted in the piston portion 21, and the flange portion 19 side of the intermediate cylinder 23 is connected to the flange portion 19 by a bolt 25. An end plate 27 is connected by bolts 29 to the side of the intermediate cylinder 25 opposite to the flange portion 19.

A first piston 31 is fitted and inserted into the end plate 27 side of the intermediate cylinder 23, and a recess 31 a formed in the first piston 31 is fitted into the piston portion 21. A piston hole 21a is formed in the center of the piston portion 21, and the second piston 33, the steel ball 35, and the third piston 37 are housed in this piston hole 21a in order from the first piston 31 side. .

An oil hole 27 a is formed in the end plate 27 and is connected to a hydraulic pressure source 41 via a direction switching valve 39. The oil hole 27 a is communicated with the end plate 27 side of the first piston 31. ing.

Further, the intermediate cylinder 23 is formed with an oil hole 23 a connected to a hydraulic pressure source 41 via a direction switching valve 39, and the oil hole 23 a is opposite to the end plate 27 of the first piston 31. It is in communication with the other side.

A circular recess 17a is formed in the holding portion 17 of the apparatus body, and the thin-walled cylindrical body 11 made of metal is fitted into the recess 17a. An annular recess 11a is formed on the outer periphery of the thin tubular body 11, and an oil hole 17b communicating with the piston hole 21a of the piston portion 21 is formed in the annular recess 11a.

Thus, in this embodiment, a plurality of fluid ejection holes 11b for ejecting air are formed on the insertion side of the held member 13 in the thin-walled tubular body 11. These fluid ejection holes 11b are regularly formed at a predetermined angle from the center of the thin tubular body 11.

As shown in FIG. 2, an annular groove 11c is formed on the outer periphery of the thin tubular body 11 where the fluid ejection hole 11b is formed. The annular groove 11c has an air hole 17c. One end of is connected.

The other end of the air hole 17c is connected to the air pressure source 45 via the switching valve 43. In addition, an opening 17d for discharging chips, dust, oil and the like that have entered the inside of the thin tubular body 11 is formed on the bottom surface side of the recess 17a of the holding portion 17.

In the fluid pressure chuck device described above, the held member 13 is held as described below. That is, first, the switching valve 43 is turned on, the air from the air pressure source 45 passes through the air hole 17c, is guided to the annular groove 11c formed on the outer periphery of the thin-walled tubular body 11, and is discharged from the fluid ejection hole 11b to the thin-walled tube. It is ejected toward the inside of the body 11.

After that, for example, the held member 13 grasped by the robot hand is moved in the arrow X direction, and the held member 13 is inserted into the thin-walled tubular body 11. After that, when the held member 13 is inserted to a predetermined position, the direction switching valve 39 is switched, and the oil from the hydraulic pressure source 41 passes through the oil hole 27a and is supplied to the end plate 27 side of the first piston 31. As a result, the first piston 31 moves to the piston portion 21 side, and the first piston 31 presses the second piston 33 and the third piston 37 toward the holding portion 17 side.

As a result, a large pressure acts on the annular recess 11a formed on the outer periphery of the thin tubular body 11 via the oil hole 17b, and the thin tubular body 11 inside the annular recess 11a is reduced in diameter. The held member 13 is firmly held.

Then, when the predetermined processing work or the like while holding the held member 13 in the holding portion 17 is completed, the held member 13 is removed from the holding portion 17. This removal is performed by switching the direction switching valve 39 and supplying oil from the hydraulic pressure source 41 to the opposite side of the end plate 27 of the first piston 31 via the oil hole 23a.

That is, as a result, the first piston 31 moves to the end plate 27 side, and the third piston 37 and the second piston 33 move to the first piston 31 side by the pressure oil sealed in the oil hole 17b. However, due to the decrease in the pressure of the oil in the annular recess 11a, the thin-walled tubular body 11 returns to its original position due to elasticity, and the holding of the held member 13 by the thin-walled tubular body 11 is released. The held member 13 thus moved is moved in the direction opposite to the arrow X, and the held member 13 is removed from the thin tubular body 11.

Therefore, in the above-described fluid pressure chuck device, when the held member 13 is inserted into the thin-walled tubular body 11, air is ejected from the plurality of fluid ejection holes 11b and inserted into the thin-walled tubular body 11. Since the held member 13 to be held is in the floating state, the held member 13 can be quickly and surely inserted into the thin-walled tubular body 11.

At this time, the ejected air flows out through the annular gap between the outer periphery of the held member 13 and the inner diameter 11d of the thin tubular body 11. In the embodiment described above, the held member 13 is inserted into the thin-walled tubular body 11 and the held member 13 is reduced in diameter, so that the fluid pressure chuck device is structured to hold the held member 13. The example to which the invention is applied has been described, but the invention is not limited to such an embodiment, and the held member is fitted to the thin-walled tubular body and the held member is expanded in diameter to hold the held member. Of course, it can be applied to a fluid pressure chuck device having a structure for holding members.

Further, in the above-described embodiment, an example in which a plurality of fluid ejection holes 11b are formed in the held member 13 and air is ejected from the fluid ejection holes 11b has been described. The number of fluid suction holes is not limited to this, and a plurality of fluid suction holes are formed in the held member, and air is sucked from the fluid suction holes to create an air flow between the thin-walled cylindrical body and the held member. However, of course there are good things.

Furthermore, in the above-described embodiment, an example in which the fluid ejection hole 11b is formed perpendicularly to the inner surface of the thin-walled tubular body 11 has been described, but the present invention is not limited to this embodiment. Alternatively, for example, as shown in FIG. 3, the fluid ejection hole 11e may be formed with a predetermined inclination with respect to the inner surface of the thin-walled tubular body 11, and in this case, the insertion is further facilitated. Become.

Further, in the above-described embodiment, an example in which the thin-walled tubular body 11 is deformed by hydraulic pressure has been described, but the present invention is not limited to this embodiment, and if necessary, other Of course, the thin cylindrical body 11 may be deformed by the fluid.

Further, in the above-described embodiment, an example in which air is ejected from the fluid ejection hole 11b has been described, but the present invention is not limited to this embodiment, and other air may be used as necessary. Needless to say, the fluid may be ejected.

[0031]

[Effect of device]

 As described above, in the fluid pressure chuck device of the present invention, when the held member is inserted into or fitted into the thin-walled tubular body, for example, air is jetted from the plurality of fluid ejection holes to form the thin-walled tubular body. The held member to be inserted or fitted is in a floating state, or when the held member is inserted or fitted into the thin-walled tubular body, for example, air is sucked from a plurality of fluid suction holes. Since the held member to be inserted or fitted into the thin cylindrical body is in a floating state, there is an advantage that the held member can be inserted or fitted into the thin cylindrical body quickly and reliably.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a fluid pressure chuck device of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a cross-sectional view showing another example of a fluid ejection hole formed in a thin tubular body.

[Explanation of symbols]

 11 Thin-walled tubular body 11b, 11e Fluid ejection hole 15 Device body 17 Holding part 19 Flange part 21 Piston part 23 Intermediate tube 27 End plate

Claims (1)

[Scope of utility model registration request] 1. A thin-walled tubular body is inserted or fitted inside or outside of the thin-walled tubular body by applying fluid pressure to the outer or inner side of the thin-walled tubular body to reduce or expand the diameter of the thin-walled tubular body. A fluid pressure chuck device for holding a held member, wherein a plurality of fluid ejection holes or fluid suction holes are provided on the held member side of the thin tubular body.