JPH0739066B2 - Chuck - Google Patents

Description

TECHNICAL FIELD The present invention relates to a chuck for gripping a cylindrical work (workpiece).

<< Prior Art >> Conventionally, various machine tools such as a scroll chuck are used in a machine tool, but in all cases, the direction in which a work is attached and detached is the axial direction of the chuck.

<< Problems to be Solved by the Invention >> Therefore, in the conventional chuck, the transfer of the work is troublesome when the supply position or the discharge position of the work is apart from the chuck shaft.

An object of the present invention is to obtain a chuck that can attach and detach a work piece in a direction orthogonal to the chuck axis.

<< Means for Solving the Problem >> To achieve this object, the chuck of the present invention has two sets of arms rotatably supported by a machine base, and each arm is equidistant from the center of rotation. Two sets of rollers are provided at the position, and the rollers of both arms sandwich a cylindrical work.

The chuck may be provided with a synchronous drive means for simultaneously rotating both arms in opposite directions. Further, means for driving the rollers may be provided to rotate the work.

<< Operation >> When using, the cylindrical work is strongly pushed between the two sets of arms, and the work is sandwiched between the rollers of the two opposite arms. You may make it rotate an arm and pinch a workpiece | work between them. To remove the work from the chuck, apply force to the work to push it out, or rotate both arms to widen the space.

<Example> As shown in FIG. 1, this chuck has a pair of left and right arms 2 rotatably supported by a machine base 1. Each arm has two rollers 4 equidistant from the center of rotation 3. Reference numeral 5 is a cylindrical work. The distance between the corresponding rollers 4 of the left and right arms 2 is made slightly smaller than the diameter of the work. The peripheral surface of the roller 4 may be formed of an elastic material so as not to damage the work 5.

When the workpiece is clamped by this chuck, as shown in FIG. 1, the two arms 2 are opened in a V shape and the workpiece 5 is opened.
Is placed between the arms 2 and pushed down strongly. This way
The two arms 2 rotate downward, and the work 5 is sandwiched between them. Thus, when the arm is horizontal, the clamping is completed (Fig. 2). In the state shown in FIG. 2, for example, when a downward force is applied to the work 5, both arms try to rotate downward. However, when this happens, the distance between the upper rollers is narrowed, so that the work 5 is clamped by a stronger force. When upward force is applied to the work, the distance between the lower rollers decreases. In this way, the work cannot be easily removed in any case.

In this way, the work is clamped by the chuck, and the work is processed and processed (for example, engraving, labeling, cleaning, etc.).

After finishing the work, push down the work with a strong force to remove it from the chuck.

It should be noted here that the work is supplied to the chuck from a direction perpendicular to the chuck shaft 6 (that is, a straight line passing through the center of the rotation center 3 of both arms and perpendicular to the paper surface in FIG. 2). It is to be discharged in a direction perpendicular to.
This point is essentially different from the conventional chuck. Therefore, when the conventional chuck is used to convey the work in a complicated manner, the use of the chuck allows the work to be conveyed smoothly.

FIG. 3 shows the apparatus of FIG. 1 provided with a synchronous drive means 10 so that the arms rotate in synchronization. That is,
Reference numeral 11 is a spur gear that is connected to the arm 2, and the left and right gears mesh with each other. Reference numeral 12 is a drive motor, and a pinion 13 fixed to its output shaft meshes with one spur gear. In this device, when the motor 12 is driven, both spur gears 11, and thus both arms 2, simultaneously rotate in opposite directions.

When sandwiching a work in this chuck, open the two arms in a C shape as shown by the chain line in Fig. 3, place the work 5 between the arms 2, and press it gently so that the work does not escape. While rotating both arms downward. Thus
When both arms are rotated until they become horizontal, the work is clamped as in the case of FIG. To remove it, simply rotate both arms.

In the device shown in FIG. 3, a spur gear is used as the synchronous drive means,
Various other things can be used.

For example, FIG. 4 uses a pulley 14 and a transmission belt 15.

A device shown in FIG. 5 is a device in which a rotary drive device 20 is added to the device shown in FIG. 1 in order to perform processing and processing while rotating the work held by the chuck. That is, the pulley 21a is provided at the center of rotation of at least one arm, and the endless belt is stretched between this and the two rollers 4. And pulley
21a and a pulley 21b integrated with a motor 24 via a transmission belt 23.
Drive to rotate with. In this apparatus, since the roller 4 is rotationally driven by the motor 24, the work 5 held by the roller 4 rotates.

<< Effects of the Invention >> The chuck according to claim 1 is rotatably supported on the machine base.
It has a pair of arms, and each arm is 2 equidistant from the center of rotation.
It has a pair of rollers and clamps a cylindrical work with the rollers of both arms.The work should be supplied from the direction perpendicular to the chuck shaft and discharged in the direction perpendicular to the chuck shaft. The work can be transported smoothly depending on the place of use.

Further, since the motors for simultaneously rotating both arms in opposite directions are provided, the work can be easily clamped and discharged, and it is not necessary to apply an excessive force to the work.

The apparatus according to the second aspect has means for driving the roller to rotate, and therefore the work can be rotated while being clamped by the chuck to perform various processing and treatments on the work.

[Brief description of drawings]

FIG. 1 is an explanatory view of a chuck as a first embodiment, FIG. 2 is an explanatory view of the chuck when a work is held, FIG. 3 is an explanatory view of a chuck as a second embodiment, and FIG. Third
FIG. 5 is an explanatory diagram of a chuck as an example, and FIG. 5 is an explanatory diagram of a chuck as a fourth example. 1 ... Machine stand, 2 ... Arm, 3 ... Rotation center, 4 ... Roller, 5 ... Work, 10 ... Synchronous drive means, 20 ... Rotation drive means

Claims (2)

[Claims] 1. A set of two arms (2) rotatably supported on a machine base (1), each arm having two sets of rollers (4) equidistant from a center of rotation (3). ) And a workpiece (5) having a circular outer shape is sandwiched by rollers of both arms, the motor (12) simultaneously rotating both arms (2) in opposite directions. ) Is provided. 2. A set of two arms (2) rotatably supported on a machine base (1), each arm having two sets of rollers (4) equidistant from a center of rotation (3). ), And a chuck that holds the work (5) having a circular outer shape by the rollers of both arms, and has means (20) for rotationally driving the roller (4). A chuck characterized by.