JPS6243770Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a chuck device used for transporting an injection cylinder unit or the like of a synthetic resin molding machine.

The purpose of this invention is to provide a chuck device that can reliably hold a block holding stand provided in an injection cylinder unit, a mold, etc. when they are transported between a stocker and a molding machine for exchange. It's about doing.

In this invention for the above purpose, a piston of a cylinder, a pair of L-shaped links, and a hand are respectively provided on the upper plate and the lower plate, which are integrally connected with a required interval, and the L-shaped link is moved by the operation of the cylinder. The hand is configured to open and close, and the cylinder is provided with a spring member so that the cylinder is always pressed in the hand closing direction, and the hand is opened only when the cylinder is pressed downward. It is what it is.

This invention will be explained in detail below using an example of replacing an injection cylinder unit.

In Figures 1 and 2, 2 and 2 are gate-shaped frames installed on both sides of the bed 1, and a slide table 3 is placed on top of the gate-shaped frame.
is constructed, and a slide table 4 is movably mounted on the slide table 3. Also mounted on the slide table 4 are a drive device 5 for movement consisting of an electric motor, a clutch, a brake, gears, etc., and an elevating cylinder 8 with a rod 6 having a chuck device 7 attached to its lower end.

The chuck device 7 is formed by connecting an upper plate 10 and a lower plate 11 below it with a joint rod 12, and the rod 6 is connected to the center of the upper plate 10.
However, guide rods 9 parallel to the rods 6 are installed vertically on both sides. Further, a piston 14 for opening and closing the L-shaped link 13 is fixed inside the upper plate 10. The cylinder 15 paired with the piston 14 has an upper plate 1 connected to the lower plate 11.
A guide rod 16 that fits into the cylinder 16 passes through the cylinder 15 and guides the cylinder 15.

Also, between the spring collar 17 fitted into the guide rod 16 and the cylinder 15, there is a compression coil spring 1.
8 is attached and acts to push up the cylinder 15. The two L-shaped links 13, 13 are
A pin 19 disposed on the lower plate 11 is used as a fixed axis, and the pin connected to the cylinder 15 and the pin connected to the hands 20, 20 are connected to each other in the L-shaped link 13. It is supported so that it can move in a sliding groove. The hands 20, 20 are chuck guides 21, 2 fixed to the lower plate 11.
1, and the vertical movement of the cylinder 15 is controlled by L.
It has a structure that opens and closes by interlocking the shaped links 13, 13 and the pin. Also hand 20,
A chuck pawl 20a is provided at the center of the chuck pawl 20a, and even when the hands 20, 20 are closed, the chuck pawl 20a does not act to tighten the block holding base, which will be described later. Therefore, it is tightened only at both ends of the hands 20, 20, and the mechanism is such that it is tightened on a total of four sides of the opposing hands 20.

On the other hand, the heating cylinder unit 22 includes a heating cylinder 22a,
It is composed of a heating cylinder block 23, a block holding stand 24, a screw, etc. Of these, the block holding stand 24 is connected to the hand 2 of the heating cylinder chuck device 7.
Checked at 0,20.

This block holding stand 24 is fixed on the heating cylinder block 23 on the heating cylinder axis, and two chucked surfaces are provided symmetrically to the heating cylinder axis, each having the same inclination toward the axis. In addition, the chucked surface is parallel to the axis of the heating cylinder and has a constant length.
A groove into which the chuck pawl 20a fits is provided in the center. This groove and chuck pawl 20a
In the state in which the hands 20, 20 are tightening the block holding base 24, if the chuck cylinder 1
Even if pressure oil is not supplied to the upper chamber of the cylinder 15, the compression coil spring 18 pushes up the cylinder 15, tightening the hands 20, 20, and even if the heating cylinder unit is heavy and cannot be supported by spring force, the block When the groove of the holding base 24 comes into contact with the chuck pawl 20a, the weight of the heating cylinder unit 22 will be supported by the chuck pawl 20a, and the hands 20, 20 will no longer open.

Therefore, the heating cylinder unit 22 is held with a slight gap between the groove of the block holder 24 and the chuck pawl 22a, and is chucked almost parallel to each other.

Furthermore, when pressure oil is fed into the upper chamber of the chuck cylinder 15 to chuck the heating cylinder unit 22, the chucked surface of the block holding base 24 extends a certain length parallel to the heating cylinder axis. Therefore, even if the heating cylinder unit 22 is grabbed at a position other than the center of gravity, the horizontal state can be maintained with a relatively small chuck force.

On the other hand, the heating cylinder storage device that stores the heating cylinder unit 22 that has been replaced with the spare heating cylinder unit 22 is
Movable slide table 4 on slide table 3
It is provided along the axis of the lifting cylinder 8 located above. In addition, an electric motor is used as the power source for the drive device for moving the table, and hydraulic cylinders are used for the lifting cylinder 8 and the chuck cylinder 15, but these can be replaced by other known methods such as a hydraulic motor or a pneumatic cylinder. You may also use

The present invention has the above configuration, and its operation will be explained next.

When the injection device reaches its most retracted position, the center of the block holder 24 in the heating cylinder unit 22 and the center of the chuck piston 14 coincide.
In this state, pressure oil is sent to the lower chamber of the chuck cylinder 15, and the hands 20, 20 are opened to both sides via the L-shaped links 13, 13.

Next, pressure oil is sent to the upper chamber of the lifting cylinder 8, the chuck device is lowered, and the holding stand stopper is brought into pressure contact with the block holding stand 24. At this time, the clutch in the drive device 5 is disengaged to allow the gear to rotate freely, and then pressure oil is sent to the upper chamber of the chuck cylinder 15, and the hands 20, 20 are closed, completing the descending chuck closing process.

At the same time as this is completed, the clamp cylinder (not shown) in the injection device is unclamped, and in response to that signal, the brake in the drive device 5 is activated, pressure oil is sent to the lower chamber of the lifting cylinder 8, and the heating cylinder is While holding the unit 22, turn the chuck device 7
to rise. The chuck device 7 hits a chuck device stopper located under the slide table and the chuck raising process is completed.

When a signal indicating the completion of chuck raising is issued, the brake of the drive device 5 on the slide table 4 is released, the clutch is connected, the motor is driven, and the movement process begins, and the heating cylinder unit 22 is moved to a predetermined position in the heating cylinder storage device. Move to just above the point.

At this time, the clamp cylinder of the heating cylinder storage device is in an unclamped state, and after confirming this, pressure oil is sent to the upper chamber of the lifting cylinder 8, and the heating cylinder unit 2
Lower the chuck device 7 while holding the chuck 2.

When the heating cylinder unit 22 has descended to just in front of the heating cylinder storage area, the clutch in the drive device 5 is disengaged, and the slide table 4 can be moved by external force. Furthermore, when storing the heating cylinder unit 22 at a predetermined location in the heating cylinder storage device, even if the position is slightly deviated, the positioning guide on the heating cylinder unit side is guided by the positioning guide on the heating cylinder storage device side. By lowering and pressing the unit 22, the heating cylinder unit 22 is automatically positioned and stored.

Next, pressure oil is sent to the clamp cylinder of the heating cylinder storage device to clamp the heating cylinder unit 22. In response to the clamp completion signal, pressure oil is sent to the upper chamber of the chuck cylinder 15, and the hands 20, 20 are opened.
The lowering chuck opening process is completed. Then hand 2
With 0 and 20 open, pressurized oil is sent to the lower chamber of the lifting cylinder 8 to perform the lifting process of the chuck device.
Upon receiving the signal indicating that the chuck has been raised, a process of moving the other heating cylinder unit 22 to the position immediately above the heating cylinder storage device in which it is stored begins.

Next, perform the lowering and chuck closing steps in the same way as when using the injection device, grab the heating cylinder unit 22 and complete the chuck raising step, and upon receiving the signal that the chuck has been raised, the slide table 4 moves to just above the injection device. . Afterwards, the process of lowering and opening the chuck is performed, and a new heating cylinder unit 22 is installed.
is attached to the injection device, the clamp cylinder of the injection device is placed in a clamped state, and the chuck device 7 is again raised to its initial position to return it to its initial position. Thereafter, the above steps are sequentially repeated.

Since this invention consists of a chuck device as described above, it is possible to always securely hold and release the chuck.
Furthermore, even if the pressing force against the cylinder is lost for some reason once it is clamped, the clamping state is maintained by the spring member and the injection cylinder unit is prevented from falling, making it extremely safe. It has characteristics.

[Brief explanation of the drawing]

The drawings illustrate the chuck device according to this invention; FIG. 1 is a front view of the injection cylinder unit exchange device, FIG. 2 is a side view, and FIGS. 3 to 6 show the chuck device of this invention. FIG. 3 is a half longitudinal front view when the hand is in operation, FIG. 4 is a half longitudinal front view when the hand is open, FIG. 5 is a half longitudinal side view, and FIG. 6 is a hand and guide member. It is a perspective view which shows the suspension member. 7...Chuck device, 10...Top plate, 11...
Lower plate, 13... L-shaped link, 14... Piston,
15...Cylinder, 18...Spring member, 20...
hand.

Claims (1)

[Scope of utility model registration request] The upper plate and the lower plate are integrally connected at a required interval, and a piston of a cylinder that operates the L-shaped link on the lower plate side is fixed to the center of the upper plate, and a spring member that constantly presses the cylinder upward. , a pair of hands are slidably inserted into the guide members on both sides of the lower plate, and are installed opposite to each other on the lower surface of the lower plate, and the pair of L-shaped links are provided between the hands and the cylinder. chuck device.