JPH0617808U - Automatic chuck device - Google Patents

Abstract

(57) [Summary] [Object] To provide an automatic chuck device in which movement for gripping an object to be gripped and tightening or loosening operation of a tightening jaw are automatically controlled. [Structure] A chuck device 1 that is advanced and retracted by a feed screw shaft 4 and is controlled to be stopped at a predetermined position by a proximity switch 6, and is fitted into a tightening hole 7 of the chuck device 1 and attached, and splined inside. A tightening insertion rod 8 in which a groove 81 is formed, a spline shaft 9 provided to be movable forward and backward by an actuator 11 so as to engage or disengage the spline female groove 81 of the tightening insertion rod 8, and the spline shaft. Chain sprocket 10 for imparting both forward and reverse rotational force to 9,
It is composed of a torque motor 12 and a chain 13. According to this invention, since the tightening of the tightening hole of the chuck device is automatically controlled by the rotating spline shaft, no human power is required, and moreover, the tightening is due to the chucking jaw of the chuck and damage due to impact. There is no problem such as looseness and looseness, and there is an advantage that an efficient automatic chuck can be easily performed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an automatic chuck device, and more particularly to an automatic chuck device in which movement for gripping an object to be gripped and tightening or loosening operation of a tightening jaw are automatically controlled.

[0002]

[Prior art]

 For example, in a chuck device that has tightening holes (7 in FIG. 1) for tightening or loosening, such as a so-called scroll chuck for fixing a work on a lathe, tightening the work For loosening, a T-shaped tool commonly called a dragonfly was inserted into the tightening hole 7 and the tip of the tool was rotated to be manually operated by a worker.

There is also known a chuck device for fixing an object to be grasped by pneumatic pressure or hydraulic pressure of a cylinder without the need for manual labor of an operator.

[0004]

[Problems to be solved by the device]

 However, in the case of a chucking system of a tightening method that is manually performed by an operator, the labor of the operator is a problem, and in the case of pneumatic pressure, the movement of the clamping jaw of the chucking device gives an impact to the object to be gripped and damages it. In addition, there was an accident in which the gripping force was reduced due to leakage of the pressure medium.

[0005]

[Means for Solving the Problems]

 Means adopted by the present invention to solve the above-mentioned problems are a chuck device which is fed by a feed screw shaft and is controlled so as to be stopped at a predetermined position by a proximity switch, and a fitting device which is fitted into a tightening hole of the chuck device. And a spline shaft having a spline female groove formed therein, a spline shaft that is movable forward and backward by an actuator so as to engage or disengage with the spline female groove of the tightening rod, and the spline. An automatic chucking device having a device for applying a rotational force to the shaft in both forward and reverse directions.

Further, the means adopted by the present invention is that, in the automatic chuck device, the actuator for driving the spline shaft forward and backward and the torque motor of the device for applying the rotational force are controlled in conjunction with the excitation of the proximity switch. It is an automatic chuck device characterized by.

[0007]

[Action]

 Since the tightening of the tightening holes of the chuck device is automatically controlled by the rotating spline shaft, no human power is required, and the tightening is due to the chucking jaws of the chuck and the damage caused by the direct impact of the fluid pressure. There is no problem such as looseness, and an efficient automatic chuck device is provided.

[0008]

【Example】

 An embodiment of the present invention will be described with reference to FIG. Reference numeral 1 is, for example, a chuck device such as a scroll chuck, which is provided with a tightening jaw 1A, in which an object 2 to be gripped can be gripped and fixed by tightening. The object to be grasped 2 can be rotated by the motor 1B according to the purpose of processing. Further, for the purpose of processing, or for optimizing the grasping position of the object to be grasped 2, the entire chuck device 1 can be moved in the vertical direction of FIG. 1 by the feed screw shaft 4. Reference numeral 5 is a feed motor for rotationally driving the feed screw shaft 4, reference numeral 3 is a guide rod, and reference numeral 6 is a fastening insertion rod 8 for detecting the chuck device 1 so as not to shift in the rotational direction. It is a proximity switch for.

The tightening hole 7 provided on the side surface of the chuck device 1 has a shape similar to the external shape of the insertion end of a conventional register mark, and has a spline female groove 81 formed in the inserting direction. The insertion rod 8 is attached. An appropriate spline shaft 9 extending in the direction of engaging with the spline female groove 81 is rotatably provided at a position facing the spline female groove 81 of the tightening insertion rod 8 so as to be able to move forward and backward by an actuator 11. . As the actuator 11, a fluid pressure cylinder such as a pneumatic cylinder is simple.

A device for rotating the spline shaft 9 includes a chain sprocket wheel 10 having a spline female groove engaging with the spline shaft 9 at its center, and a rotational force is applied to the chain sprocket 10 via a chain 13. It is the torque motor 12 that operates. The torque motor 12 can provide rotation in any direction. The torque motor 12, the chain sprocket 10, the spline shaft 9, the actuator 11 and the like described above are all provided on the mounting frame 14 which is integrally mounted on the chuck device 1.

Next, the operation of the automatic chuck device of the present invention will be described. First, when the chuck device 1 is fed by the feed motor 5, the installation position of the proximity switch 6 is predetermined so that the proximity switch 6 stops at a desired position. The actuation of the actuator 11 is commanded by the excitation of the proximity switch 6, and the spline shaft 9 is inserted into the tightening insertion rod 8 by this actuation. The actuator 11 is provided with a pressure sensor (not shown) in advance, which detects when the spline shaft 9 has been inserted into the tightening insertion rod 8, and then the torque motor 12 is moved in a desired direction. The object to be grasped 2 may be fixed or released by rotating it to tighten or loosen the chuck device 1.

[0012]

[Effect of device]

 According to this invention, since the tightening of the tightening hole of the chuck device is automatically controlled by the rotating spline shaft, no human power is required, and the tightening is due to the chucking jaw of the chuck and not due to impact. There are no problems such as breakage and loosening, and there is an advantage that efficient automatic chucking can be performed easily. In addition, the magnitude of the gripping fixing force can be set by setting the voltage of the torque motor 12, and there is an advantage that the gripping force does not decrease even in the event of a power failure or the like.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention.

[Explanation of symbols]

 1A Tightening jaw 1B Gripping object rotation motor 2 Gripping object 3 Guide rod 4 Feed screw shaft 5 Feeding motor 6 Proximity switch 7 Tightening hole 8 Tightening insertion rod 81 Spline female groove 9 Spline shaft 10 Chain sprockets 11 Actuator 12 Torque motor 13 Chain 14 mounting frame

Claims (2)

[Scope of utility model registration request] 1. A chuck device (1) which is fed by a feed screw shaft (4) toward or away from an object to be grasped (2) and a tightening hole (7) of the chuck device (1). Tightening insertion rod (8) which is fitted together and has a spline female groove (81) formed inside.
And a spline shaft (9) that is movable forward and backward by an actuator (11) so as to engage or disengage the spline female groove (81) of the tightening insertion rod (8). ), And a device (10, 12, 13) for applying a rotational force in both the forward and reverse directions to the automatic chuck device. 2. An actuator (11) for advancing and retracting the spline shaft (9) and a torque motor (12) of the device for applying the rotational force are controlled in association with the excitation of the proximity switch (6). The automatic chucking device according to claim 1, wherein: