JPH10296566A - Portable type chucking tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably move a workpiece with a chucking tool along a base upper face by means of very small force by providing a workpiece holding part on the upper face and arranging a jetting hole for compressed air supplied from the outside in the lower face position approximately just beneath the center of gravity. SOLUTION: Compressed air, which is fed to an air flow rate regulating valve 14, is properly throttled in the regulating valve 14, and then, blown into a void space 4 formed inside a box-shaped frame 2 via a pipe line 15 through an air jetting port P3. The blown compressed air is jetted to the outside of the lower face 3b of a lid plate 3 via a jetting port P1. In this way, an air flow layer with a constant pressure is formed on the lower face 3b of the lid plate 3, so that a chucking tool tends to slightly float from a working bench upper face. When the chucking tool is held by means of both hands so as set it along the working bench upper face while external force is added in the horizontal optional direction, the chucking tool is moved in the direction of the external force.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chuck used for processing a workpiece with a machine tool or the like, and having a gripping portion of the workpiece and an outlet for compressed air.

[0002]

2. Description of the Related Art There is a general type of chuck having a work gripping portion on the upper surface by vacuum pressure or magnetic force. This type of chuck tool is used for fixing a work so that the work does not move on a work table of a machine tool, for example.

[0003]

By the way, in machining by a machine tool or the like, there is a case where it is desired to move a work together with a chuck tool along the upper surface of the work table on the work table.
In such a case, the chuck tool is heavy and hard to move, and may require a great deal of labor. An object of the present invention is to provide a chuck tool capable of easily moving the whole together with a work under such circumstances.

[0004]

In order to achieve the above object, according to the present invention, a work holding portion is provided on an upper surface, and an ejection hole for compressed air supplied from the outside is provided at a lower surface portion substantially directly below a center of gravity. . At this time, an air flow control valve that allows the flow rate of the compressed air jetted from the jet holes to be changed and adjusted is provided. Further, the work holding portion may be any appropriate one, and may be, for example, a vacuum suction type or a magnetic attraction type. The compressed air ejected from the ejection holes is supplied between the upper surface of the worktable and the lower surface of the chuck tool, and the chuck tool tends to float by the air pressure. The air flow adjusting valve changes the floating tendency by an adjusting operation.

The above-described invention is specifically as follows. That is, the upper surface is a flat surface, an air suction hole is provided near the center of the flat surface, a plurality of concentric annular grooves for packing insertion are provided surrounding the suction hole, and these annular grooves are provided. An ejector is provided which is provided with a communication groove which is made to intersect with each of the annular grooves and communicates with each of the annular grooves and the suction hole, and further which sucks air from the suction hole by compressed air supplied from the outside. Attached.

[0006] A packing such as an O-ring is inserted into an arbitrary one of the plurality of annular grooves, a work is placed on the packing, and then the ejector is operated. (Work holding part). Here, the presence of a plurality of annular grooves into which the packing is inserted widens the size range of the work that can be fixed by suction.

[0007] A guide die is provided on the lower surface for guiding the feed movement during processing. When using such a chuck tool, an engaging pin is protruded from the upper surface of the worktable, and the chuck tool is moved along a predetermined fixed track due to the relation between the pin and the guide type. Becomes

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a chuck according to the present invention will be described below with reference to FIGS. Here, FIG. 1 is a perspective view of the chucking tool, and FIG. 2 is a view of the chucking tool viewed from the back, with a cover plate removed. As shown in these figures, the main body 1 of the chuck device comprises a box-shaped frame 2 and a cover plate 3.

The box-shaped frame 2 has a peripheral wall 2a and a top wall 2
b, a rectangular space 4 is formed therein, and a through hole p functioning as an air suction hole is provided at the center of the upper wall portion 2b.

The cover plate 3 is for covering the space 4 in a sealed manner, and is provided with a plurality of bolt insertion holes 3a in the periphery and a through hole p1 functioning as an air ejection hole in the center. It has been done. Here, the air ejection hole p1 is located immediately below the center of gravity of the product of the present invention. The cover plate 3 is fixed to the lower surface of the peripheral wall 2a of the box-shaped frame 2 by bolts.

Reference numeral 5 denotes a stop valve fixed to the box-shaped frame 2, which is supplied with compressed air to one opening from an external compressed air supply source (not shown) through a flexible pipe 6 such as a rubber hose. .

Reference numeral 7 denotes a distributor for distributing the compressed air supplied through a pipe 8 connected to the other opening of the stop valve 5 to two pipes 9, 10. At this time, the conduit 8 penetrates the peripheral wall 2a of the box-shaped frame 2 in an airtight manner.

Reference numeral 11 denotes an ejector located in the cavity 4. The outlet of the pipe 9 is connected to the air supply section 11a, and the air suction port is connected to the air suction section 11b through the pipe 12. p is communicated. In addition, the air discharge portion 11c communicates with the exhaust hole p2 provided in the peripheral wall portion 2a of the box-shaped frame 2 through the conduit 13.

Reference numeral 14 denotes a flow rate control valve fixed to the outer surface of the peripheral wall 2a of the box-shaped frame 2. The flow rate control valve is connected to the outlet end of the conduit 10 at the inlet side thereof, and is connected to the outlet side at the outlet side. An air blowing hole p3 provided in the peripheral wall portion 2a is communicated through a path 15. At this time, the pipe 10 penetrates the peripheral wall portion 2a of the box-shaped frame 2 in an airtight manner.

Reference numeral 16 denotes a vacuum gauge mounted on the outer surface of the peripheral wall portion 2a of the box-shaped frame 2, to which a distal end of a communication pipe 17 branched from the middle of the conduit 12 is connected.

A spherical concave portion b is formed at the position where the air suction hole p exists on the upper surface a of the box-shaped frame 2, and the concentrically arranged packing surrounding the concave portion b is formed on the upper surface a. A plurality of annular grooves c1, c2, and c3 for insertion are provided, and a communication groove d is provided in a direction intersecting the annular grooves c1, c2, and c3, and an air suction hole p is formed through the communication groove d.
And the annular grooves c1, c2, c3 are communicated with each other. On the other hand, a rubber annular packing fitted to each of the annular grooves c1, c2, c3 is formed, and this packing may be an existing O-ring or the like.

Next, an example of use of the product of the present invention configured as described above and its operation will be described. After the rubber hose 6 is connected to the stop valve 5, the product of the present invention is placed on the worktable e of the machine tool as shown in FIG. Further, an O-ring prepared in advance is fitted into one annular groove c1 suitable for the size of the work w to be processed, the work w is brought into close contact with the O-ring, and then the stop valve 5 is opened. Thereby, the compressed air is supplied to the ejector 11 and the air flow regulating valve 14 via the distributor 7.

The compressed air supplied to the ejector 11 applies a vacuum pressure to the pipe 12. The vacuum pressure applies an O-ring at a location between the workpiece w and the upper surface a of the box-shaped frame 2. The air present at the inner side of the annular groove c1 is sucked into the pipe 12 from the air suction hole p through the other annular grooves c2 and c3 and the communication groove d. The compressed air supplied to the supply portion 11a is discharged from the air discharge hole p2 to the outside of the box-shaped frame 2 through the pipe 13 together with the compressed air. Therefore, a vacuum pressure is applied to the lower surface of the work w, and the work w is suction-fixed to the upper surface a of the box-shaped frame 2.

On the other hand, the compressed air supplied to the air flow control valve 14 is appropriately throttled by the control valve 14, and
Is blown into the cavity 4 formed inside the box-shaped frame 2 from the air blowing hole p3. The blown compressed air is ejected to the outside of the lower surface 3b of the cover plate 3 through the ejection hole p1, whereby an air fluidized bed of a constant pressure is formed on the lower surface 3b of the cover plate 3, and the product of the present invention is Work table e
It tends to float slightly from the upper surface.

When the product of the present invention having this tendency is grasped with both hands to be along the upper surface of the worktable e and an external force is applied in a horizontal arbitrary direction, the product of the present invention will move in the direction of the external force. And

At this time, when the lower surface 3b of the product of the present invention comes into strong contact with the worktable e because the amount of air blown out from the air blowout hole p1 is too small, and the movement thereof is difficult, the air flow control valve 14 The opening degree is increased to increase the floating tendency of the product of the present invention. Conversely, when the position of the product of the present invention becomes unstable on the worktable e because the amount of air jetted from the jet hole p1 is excessive,
That is, the opening degree of the air flow control valve 14 is reduced to weaken the floating tendency of the product of the present invention.

Thus, the product of the present invention can be stably moved in a desired horizontal direction with an extremely small external force as compared with the case where compressed air is not ejected from the ejection hole p1. This movement may be performed to position the product of the present invention or the work w. In addition, as shown in FIG. It may be performed to feed and move with the article.

Next, a modification of the above embodiment will be described. FIG.
As shown in (1), a guide die 18 is formed on the lower surface 3b of the lid plate 3. The guide die 18 may be formed as a recess as shown in FIG. A, or may be formed as a protrusion 18 ′ as shown in FIG. B, or may have a wide horizontal plane h, or It may be of narrow width.

When using the product of the present invention with the cover plate 3 mounted thereon, an engaging pin 19 as shown in FIG. g, the compressed air is ejected from the ejection hole p1 as described above, and the front end of the engaging pin 19 is brought into contact with the step of the guide die 18, and the present invention is performed while maintaining this contact. The product is fed horizontally and moved.

Thus, in the product of the present invention, the direction of movement is matched with the step shape of the guide die 18 due to the interaction between the engaging pin 19 and the guide die 18, and the cutting tool g moves the workpiece w of the guide die 18. It cuts according to the shape. FIG. 5
In the figure, m is an O-ring fitted in the annular groove c1.

[0026]

According to the present invention configured as described above, a work and a chuck tool are held on a worktable of a machine tool or the like.
It can be stably moved along an upper surface with an extremely small force.

According to the second aspect of the present invention, when the weight of the work to be gripped is variously different, the air ejection amount from the ejection hole can be optimized for any of the works.

According to the third aspect of the present invention, a non-ferrous metal or a plastic plate having a variety of sizes in a wide range can be produced without trouble and with appropriate strength by the vacuum pressure of compressed air. It can be fixed by adsorption. In addition, the air supply system required to eject compressed air from the ejection holes can also be used for suction fixing of the work,
The structure is rational.

According to the fourth aspect of the present invention, the work can be accurately processed into a specific shape even by a manual feed movement by the guide type guiding action.

[Brief description of the drawings]

FIG. 1 is a perspective view of a chuck tool according to the present invention.

FIG. 2 is a view showing a state in which a lid plate is removed with the chuck tool viewed from a back surface.

FIG. 3 is a diagram showing a use state of the chuck tool.

FIG. 4 is a view showing a modification of the chuck device.

FIG. 5 is a sectional view showing a use state of the modification.

[Explanation of symbols]

 a top surface c1, c2, c3 annular groove d communication groove p air suction hole p1 ejection hole w work 3b bottom surface 11 ejector 14 air flow control valve 18 guide type

Claims (4)

[Claims] 1. A general-purpose chuck device comprising a workpiece gripping portion on an upper surface, and an outlet for compressed air supplied from outside provided at a lower surface portion substantially directly below a center of gravity. 2. The general-purpose chuck device according to claim 1, further comprising an air flow control valve for changing and adjusting a flow rate of the compressed air discharged from the discharge hole. 3. An upper surface is formed as a flat surface, an air suction hole is provided at a position near the center of the flat surface, and a plurality of concentrically arranged annular grooves for packing insertion surrounding the suction hole are provided. A communication groove is provided which is formed in a direction intersecting with each of the annular grooves and communicates with each of the annular grooves and the suction hole, and further, air is sucked from the suction hole by compressed air supplied from the outside. 3. The general-purpose chuck tool according to claim 1, further comprising an ejector. 4. A guide die for guiding a feeding movement during machining is provided on a lower surface.
The described general-purpose chuck tool.