JPH0512015U - Automatic opening / closing check assembly - Google Patents

Abstract

(57) [Summary] [Purpose] The same centering condition is maintained when performing repeated measurements on items within a specified size range, and it is possible to perform measurements that are sufficiently satisfactory for precision measurements, and to use an air cylinder. (EN) Provided is an automatic opening / closing chuck assembly which can be incorporated into an automatic measuring machine by expanding and contracting by a remote control to move a taper cone up and down. A body, a plurality of chuck claws slidably inserted in a plurality of grooves horizontally provided in the body at equal division angles, and a body for biasing the chuck claws inward with respect to the body. A plurality of compression springs, a taper cone slidably inserted in a hole provided in the body in the longitudinal direction, and an air cylinder provided below the taper cone and engageable with a lower end surface of the taper cone. The plurality of chuck claws are automatically opened and closed by the vertical movement of the taper cone caused by expanding and contracting the air cylinder by remote control.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a chuck assembly, and more particularly, to an auto opening / closing chuck assembly suitable for precision measurement.

[0002]

[Prior Art]

 Conventional chuck assemblies have generally used air chucks, collet chucks, scroll chucks, and the like.

[0003]

[Problems to be solved by the device]

 However, in the conventional chuck assembly as described above, even if the chuck assembly is first set and placed on the rotary base, the same centering is not always necessary when the items within the predetermined size range are repeatedly chucked. In many cases, misalignment occurs without maintaining the condition, which is not satisfactory for precision measurement, and is not suitable.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention comprises a body, a plurality of chuck claws slidably inserted in a plurality of grooves horizontally equidistantly formed in the body, and the chuck claw described above. A plurality of compression springs inserted into the body to bias it inwardly with respect to the body; a taper cone slidably inserted into a longitudinal hole in the body; and a taper cone of the taper cone. An air cylinder which is provided below and is engageable with the lower end surface of the taper cone, and is formed on the female taper portion formed on the front lower end portions of the plurality of chuck claws and the tip end portion of the taper cone. The male taper part can be engaged with each other, and the expansion and contraction of the air cylinder can be controlled remotely. Provided is an automatic opening / closing chuck assembly capable of automatically opening / closing the chuck portions of the plurality of chuck claws by vertically moving the taper cone and repeatedly chucking an item within a predetermined size range between the chuck portions. And Further, this automatic opening / closing chuck assembly includes a rotary base at the lower part, and a compression spring and a spring bearing are interposed between the shaft intermediate step portion of the taper cone and the rotary base to lower the taper cone. It is preferable to smooth the exercise.

[0005]

【Example】

 An embodiment of an automatic opening / closing chuck assembly according to the present invention will be described below with reference to FIGS. In the automatic opening and closing chuck assembly according to the present invention, chuck claws 2 are slidably inserted along grooves 1a in grooves 1a provided in the lateral direction on the upper surface of body 1 at 90 ° quadrants. 4 shows an example of four chuck claws), a taper cone 3 is slidably inserted into a hole 1b provided in a longitudinal direction of the center of the body 1, and a female taper formed at the front lower end of the chuck claw 2 is shown. The portion and the male taper portion of the tapered cone 3 can be engaged with each other. The groove 1a and the groove 1b are formed at right angles to each other, and the chuck claw 2 and the taper cone 3 are formed with high precision so that they can slide smoothly without backlash.

The front end of the chuck claw 2 serves as a chuck, has a vertically elongated flat surface for receiving an item, and has a hole 2a extending horizontally from the rear end, and a compression spring 4 is inserted therein. The compression spring 4 is adjusted so that the chuck claw 2 is appropriately pushed by an adjusting screw 6 and a lock nut 7 which are screwed to a side cover 5 screwed to the upper surface of the body 1. On the upper surface of the body 1, an annular upper lid 8 is attached to the body 1 by a set screw 9 and holds the chuck claw 2.

An air cylinder 10 is fixed to a central position of a cylindrical cavity 1 c that opens in the center of the lower half of the body 1, and is engaged with the lower end surface of the tapered cone 3. A compression spring 12 is interposed between the upper surface of the spring receiving member 11 and the shaft intermediate step portion of the taper cone 3. The body 1 is fixed to a disk-shaped base plate 13, and the base plate 13 is fixed to an inner ring of a rotary base 15 forming a ball bearing by a set screw 14, so that the body 1 can smoothly rotate. The air cylinder 10 is made to expand and contract by remote control.

[0008]

[Action]

 In the structure described above, when the air cylinder 10 is expanded and contracted by remote control to raise the taper cone 3, the male taper portion at the tip end of the taper cone 3 becomes the female taper portion at the front lower end portion of the chuck claw 2. Engage and slide the chuck claw 2 outward against the compression spring 4 to open the chuck part of the chuck claw 2 and insert the item there, then shorten the air cylinder 10 by remote control and taper cone. When 3 is lowered, the chuck part of the chuck claw 2 closes and the chuck claw 2 chucks the product, but since this operation does not change even if it is repeated, the same centering state is maintained and for precision measurement. You will be fully satisfied.

If the shortening operation of the air cylinder 10 is too early when the taper cone 3 is descending, the air cylinder 10 and the lower end surface of the taper cone 3 or between the male taper portion of the taper cone 3 and the chuck claw 2 will be described. There is a possibility that play may occur between the chuck taper 2 and the female taper portion of the chuck, causing imbalance in the chucking action of the chuck claw 2. However, this problem is caused by the compression spring 12 provided below the intermediate shaft portion of the taper cone 3 This is solved by pressing the male taper portion of the cone 3 against the female taper portion of the chuck claw 2 so as to prevent play.

Although the force of the compression spring 12 is set to be weaker than the force of the compression spring 4, since the taper cone 3 is always pushed upward, the air cylinder 10 and the spring bearing are activated even if the air cylinder 10 operates quickly. Play between the gold 11 or between the male taper portion of the taper cone 3 and the female taper portion of the chuck claw 2 prevents unbalanced sliding of the chuck claw.

[0011]

[Effect of the device]

 Since the automatic opening / closing chuck assembly according to the present invention is configured as described above, the same centering state is maintained when repeatedly measuring an item having a predetermined size range, and the measurement is satisfactory for precision measurement. It becomes possible to Also, since the air cylinder is expanded and contracted by remote control to raise and lower the taper cone, it can be incorporated into an automatic measuring machine.

[Brief description of drawings]

FIG. 1 is a sectional front view of an embodiment of a chuck assembly according to the present invention.

FIG. 2 is a cross-sectional plan view taken along the line AA of FIG.

[Explanation of symbols]

 1 Body 1a Groove 1b Hole 1c Cylindrical Cavity 2 Chuck Claw 2a Hole 3 Tapered Cone 4 Compression Spring 5 Side Lid 6 Adjustment Screw 7 Lock Nut 8 Upper Lid 9 Set Screw 10 Air Cylinder 11 Spring Receptor 12 Compression Spring 13 Base Plate 14 Set Screw 15 rotation base

Claims (1)

[Scope of utility model registration request] 1. A body, a plurality of chuck claws slidably inserted into a plurality of grooves horizontally equidistantly provided in the body, and the chuck claws are biased inward with respect to the body. A plurality of compression springs inserted into the body for the purpose of: a taper cone slidably inserted in a hole provided in the body in a longitudinal direction; and a taper cone provided below the taper cone An air cylinder that can be engaged with the end face, and a female taper portion formed at the front and lower end portions of the plurality of chuck claws and a male taper portion formed at the tip end portion of the taper cone can be engaged with each other. The expansion and contraction of the air cylinder is remote controllable, and the expansion and contraction of the air cylinder by remote control allows the taper cone to move up and down. Thus, the chuck parts of the plurality of chuck claws are automatically opened and closed so that an item within a predetermined size range can be repeatedly chucked between the chuck parts. ..