JPH0234306B2 - SHASHUTSUSEIKEIKINOSEIKEIHINTORIDASHISOCHOCHATSUKUATATSUCHIMENTOJIDOKOKANSOCHI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to an automatic chuck attachment exchange device for a molded product take-out device of an injection molding machine.

BACKGROUND ART In a molded product take-out device of an injection molding machine, it is required to replace the hand portion used when taking out the molded product from the injection molding machine. This hand section is attached to the molded product ejecting device, and generally includes a frame, a pneumatic actuator as a gripping mechanism, an electric motor, an electromagnetic solenoid, a suction means, a nipper for cutting spools and runners, etc., and is used to handle each molded product. A dedicated hand part is used for each. This hand portion is referred to herein as a chuck attachment.
In conventional extraction devices, chuck attachments were replaced manually. In particular, if the chuck attachment is equipped with pneumatic piping that operates a fluid pressure cylinder, etc., and electrical wiring that transmits electrical signals,
A problem that makes it difficult to automate the replacement of chuck attachments is that the air piping and electrical wiring must be connected to each other during replacement. In particular, the more multi-functional the chuck attachment is, the more pneumatic circuits and electric circuits are required to connect it to the molded product ejection device, and the heavier it becomes, the more difficult it becomes to replace it by hand. Ta.

Purpose The present invention aims to solve the above-mentioned conventional problems and provide a device that enables automatic exchange of chuck attachments.

Structure The means of the present invention that solves the above problems includes a coupler for fluid piping which can be detached from each other and a coupler for electrical wiring which can be detached from each other between the chuck plate and the chuck attachment of the extraction device. An automatic exchange device characterized by being equipped with a connector, a coupling device for mutually attaching and detaching a chuck plate and a chuck attachment, and an exchange stand capable of supporting the chuck attachment. be.

According to the present invention, if the chuck attachment is manually placed on the exchange table, the chuck plate of the ejector is moved according to the program, and the chuck attachment currently attached is first pulled onto the exchange table. The coupling device is uncoupled by the uncoupling means, the coupler is uncoupled by the operation of the coupler attachment/detachment device, and the chuck plate is moved to leave the chuck attachment on the exchange table and move on to the next chuck. Approach the new chuck attachment on the exchange stand where the chuck attachment is prepared, and by inserting the coupled halves and the coupled halves, the chuck attachment itself is coupled to the chuck plate, and at the same time the fluid coupler The two halves are connected to each other by plugging and are automatically locked, and electrical wiring connectors are automatically plugged together as required.

Embodiment A specific example of the automatic chuck attachment exchange device of the present invention will be described with reference to the drawings.

In FIG. 1, a molded product 64 (FIG. 3) of a molding machine 61, for example, an injection molding machine (which can also be used as a die casting machine) is taken out from one of molds 62a and 62b, for example, mold 62a. A chuck attachment 2 is attached to the chuck plate 1 of the device 62. As shown in FIGS. 2 and 3, an example of the chuck attachment 2 includes a mounting plate 3 with molded product gripping means 4, spool clamping means 5, molded product support means 6, molded product position detection means 7, etc. is provided. FIG. 2 shows just one example; various forms of chuck attachments may be used.

4 and 5, a cylindrical body 10, which is a coupling half of a coupling device 9, is fixed to a support plate 8 of a chuck plate 1 with screws 11. As shown in FIGS. At least two coupling devices are provided. Guide holes 12 extending in the radial direction are formed in the cylindrical body 10 at a plurality of locations, for example, four locations, spaced apart in the circumferential direction. The guide hole 12 is formed so that its diameter increases toward the outer periphery, and at least two balls 13 are accommodated in the guide hole 12. The balls 13 are arranged so that the closer they are to the center of the cylinder 10, the smaller the diameter of the balls. Ball 13 closest to the center
The diameter of the ball 13 is selected to be slightly larger than the minimum diameter of the guide hole 12.
It is prevented from falling into the hollow hole 10a. A cover ring 14 is slidably attached to the outer peripheral surface of the cylinder 10.

The support plate 8 has a hydraulic cylinder 1 for actuating the coupling device.
5. For example, pneumatic cylinders, hydraulic cylinders, etc. are fixed. In Figure 4, fluid pressure cylinder 1
5 is indirectly fixed to the support plate 8 by being fixed to the cylindrical body 10 with screws 16. A cover ring 14 is fixed to a piston rod 17 of a hydraulic cylinder 15 with a screw 18.

In the operating position, the cover ring 14 has a spherical inner surface.
Press 3 toward the center. An annular recess 19 having an inner diameter larger than the outer circumference of the cylindrical body 10 is formed on the inner peripheral surface near one end of the cover ring. The annular recess 19 faces the guide hole 12 when the cover ring 14 is in the non-operating position, and the outer ball 13 is fitted into the annular recess 19 so that the center ball 13 does not protrude into the cylindrical body 10. It is set to .

A threaded portion of a lock pin 20, which is the connected half of the coupling device, is inserted into the mounting plate 3 of the chuck attachment 2, and is fixed with a nut 21. The tip of the lock pin 20 is formed into a tapered portion so that it can be smoothly inserted into the cylindrical body 10. An annular lock groove 22 is formed on the outer peripheral surface of the lock pin 20 at a position facing the guide hole 12 when the support plate 8 and the mounting plate 3 are in a predetermined attached state. In the installed state, the ball 13 is engaged with the annular locking groove 22, and when the cover ring 14 is slid to the operating position in this state, the ball 13 remains engaged with the annular locking groove and cannot be moved. is locked to the cylindrical body 10, becomes connected, and cannot be detached.

A detection switch 23, for example a proximity switch, is attached to the hydraulic cylinder 15 either directly or via a bracket. A magnet is attached to the cover ring 14 as a detection switch operating element 24.

By utilizing the magnet's hysteresis effect, one magnet can control the detection switch.
Can operate both ON and OFF.

6 and 7, a coupler plate 25 connected directly to the mounting plate 3 of the chuck attachment 2 or via a piping tube or the like is connected to a half of a coupler 26 for fluid piping, for example for air piping, e.g. It is fixed by the screw of the male coupler 26a.

The coupler 2 is attached to the base plate 27 of the coupler attachment/detachment device 60 fixed to the chuck plate 1 or the support plate 8.
The other half of 6, for example the female coupler 26b, is screwed.

A first hydraulic cylinder 28 is fixed to the substrate 27 on the side opposite to the coupler plate 25, and a second hydraulic cylinder 29 is fixed on the side facing the coupler plate 25. First fluid pressure cylinder 2
A hook support plate 30 is attached to the piston rod 28a of No. 8.
is fixed with a screw. Hook support plate 30
A foot lever 31 is pivotally attached to both ends of the lever by a pin 32. The hook support plate 30 is guided by a guide bar 33' fixed to the base plate 27.
According to the operation of the first hydraulic cylinder 28, it is movable up and down in the figure. Foot lever 31
The free end of forms a hook 32 which is bent towards the coupler plate 25. Foot lever 31
In the operating position shown in solid lines in the figure, the hook 32 can support the coupler plate 25.

An adjustment screw 34 is screwed into the foot lever 31 so as to face a stopper bar 33 fixed to the base plate 27. When the first fluid pressure cylinder 28 is in the non-operating position, that is, when the piston rod 28a is retracted, the hook support plate 30 is lowered further down in the figure than when the adjustment screw 34 is in contact with the stopper bar 33. , the foot lever 31 is pin 3
2 and is in an inclined standby position as shown by the chain line in the figure.

The relative position of the chuck plate 1 with respect to the chuck attachment 2 is set so that the hook 32 is at a position slightly distant from the coupler plate 25 as shown in the figure when the hook lever 31 is in the standby position. When the first hydraulic cylinder 28 is actuated in this arrangement, the hook support plate 3
0, the adjustment screw 34 moves to the stopper bar 33.
, and the foot lever 31 tilts due to its own weight to the operating position shown by the solid line. As a result, hook 3
2 is in a state where it can be engaged with the coupler plate 25. When the piston rod 28a further protrudes, the hook 32 draws the coupler plate 25 toward the base plate 27. At this time, the male coupler 26a is inserted into the female coupler 26b.

Piston rod 2 of second hydraulic cylinder 29
An uncoupler plate 35 is fixed to 9a with screws 36. Uncoupler plate 35
A through hole 37 is formed in which the male coupler 26a can move freely, and a recess 3 into which the lock ring 38 of the male coupler 26a can fit is formed in the through hole 37.
9 is formed. Second fluid pressure cylinder 29
When the piston rod 29a is protruding (the state shown in the figure), the lock ring 38 is moved downward in the figure by the action of the spring 40, and the coupler 26 is locked. When the male coupler 26a is to be attached to the female coupler 26b, the piston rod 29a of the second hydraulic cylinder 29 is actuated in a retracted state, and the uncoupler plate 35 is pulled toward the base plate 27. At this time, the locking ring 38 is moved to the unlocked position by the uncoupler plate 35 against the force of the spring 40. Male coupler 26a to female coupler 26b
When the installation of the second fluid pressure cylinder 29 is completed, the second fluid pressure cylinder 29
The operation is switched so that the piston rod protrudes. As a result, the uncoupler plate 35 is separated from the substrate 27, and at the same time, the locking ring 38 is moved to the locked position by the force of the spring 40, and the male coupler 26a is fixedly locked to the female coupler 26b.

If a plurality of halves of couplers 26 are arranged on the substrate 27 and the coupler plate 25, a plurality of couplers can be coupled and detached at the same time by one operation of the coupler plate 25.

A plurality of couplers can be attached at the same time by pinching the hook lever 31 at one point near the center of the coupler plate 25 provided with the plurality of couplers 26 and pulling it towards the coupler plate 25.

If the photoelectric detector 56 is placed at a common location with respect to the locking rings 38 of a plurality of couplers,
If the locking ring 38 of any coupler remains in the locked position without moving, it can be detected that the coupler is not locked.

In order to detect the relative position between the coupler plate 25 and the uncoupler plate 35, a detection switch 41, for example a proximity switch, is connected to the coupler plate 25.
5 and uncoupler plate 35.

Although not shown in detail in the figure, for example, the female part 56 (FIG. 10) of the electrical wiring connector is attached to the support plate 8 or a member such as the substrate 27.
In addition, if the male portion 57 (FIG. 10) is attached to the mounting plate 3, the male portion can be engaged with the female portion of the connector at the same time as the coupler 26. Since the coupler 26 is locked by a locking ring and has mechanical strength, the connector does not require any special locking means.

As shown in FIGS. 8 to 10, the chuck attachment exchange table 42 is formed as a cart 44 movable on wheels 43. As shown in FIGS. A removal stand 45 for removing the chuck attachment from the chuck plate and a mounting stand 46 for manually attaching the chuck attachment to be attached next are provided on the trolley 44. The removal stand 45 is provided with means for hooking the chuck attachment 2 and other fixing means. The form of the removal stand 45 can be set to any suitable structure in accordance with the form of the chuck attachment, as long as it can securely hold the chuck attachment.

The mounting base 46 includes a base plate 47 that supports the mounting plate 3 of the chuck attachment 2 and a coupler plate 2.
A positioning device 48 for positioning and holding No. 5 is provided.

The positioning device 48 is a lifting hydraulic cylinder 4 supported directly or via a support bar on the cart 44.
9, a traversing adjusting means 50 supported by the lifting hydraulic cylinder 49, for example, a traversing hydraulic cylinder, and a gripping device 51 connected to the traversing hydraulic cylinder and supported by a guide. The gripping device 51 includes a base 52 connected to the rod of the transverse hydraulic cylinder 50, a crimping means 53 attached to the pedestal 52, and one gripping claw fixed to each of the base 52 and the crimping means 53. 54. Coupler plate 25 is gripped between gripping claws 54 . As the crimping means 53, a spring device, a hydraulic cylinder, or other means can be used.

The relative position of the coupler plate 25 with respect to the mounting plate 3 is adjusted by the operation of the lifting hydraulic cylinder 49 and the traversing hydraulic cylinder 50. After fixing the mounting plate 3 to the base plate 47 and the coupler plate 25 to the gripping device 51, the positioning device 48 is operated to adjust and fix the position of the coupler plate 25.

In FIGS. 8 and 9, the chuck plate 1 approaches the removal table 45, and the chuck attachment 2 is hooked or fixed on the removal table 45. At this point, the chuck plate 1 is moved back in the direction of the arrow, and the chuck attachment is separated from the chuck plate. This retraction causes the coupler plate to be held in the holder 55. The chuck attachment is removed from the chuck plate by activating the second hydraulic cylinder 29, moving the lock ring 38 to the inoperative position, and lifting the rear chuck plate 1. At this time, since the first fluid pressure cylinder 28 is in a state in which the piston rod is retracted, the lever lever 31 is in an open state, and the coupler plate 25 is left in the holder 55 and the substrate 27 is pulled up.

After the chuck attachment is removed, when the support plate 8 of the chuck plate 1 approaches the mounting plate 3 on the base plate 47, the base plate 27 simultaneously approaches the top of the coupler plate 25. Fluid pressure cylinder 15
With the cover ring 14 held in the non-operating position, the lock pin 20 is inserted into the cylinder 10. After insertion, the cover ring 14 is moved to the operating position by the hydraulic cylinder 15 and the locking pin 20 is locked. then or at the same time the first
The hydraulic cylinder 28 is actuated, and the hook lever 31 grips the coupler plate 25 and pulls it upward. At this time, the uncoupler plate 35 is pulled up by the second fluid pressure cylinder 29, and the lock ring 38 is held in the non-operating position.
After the male coupler 26a is inserted into the female coupler 26b, the lock ring 38 is moved and locked by the operation of the second hydraulic cylinder 29. This completes the chuck attachment exchange.

Although the figure shows an example in which the mounting stand 46 is placed horizontally and the removal stand 45 is placed vertically, the present invention is not limited to this example, and horizontal or vertical placement can be selected as appropriate.

Also, in the figure, the mounting base 46 is dedicated to preparing the next chuck attachment, and the removal base 45 is dedicated to removing the previous chuck attachment, but the removal base 45 is also formed as the mounting base 46. death,
If both are used for both installation and removal, one mount 46 can be used to remove a chuck attachment, another mount 46 can be used to mount another chuck attachment, and the removed chuck attachment can then be removed. It can be stocked on a mounting base 46. In this way, several mounts can be provided and chuck attachments can be stored in each mount.

Effects According to the present invention, even if the chuck attachment has a complicated structure including fluid piping and electrical wiring, it has become possible to automatically and reliably replace the chuck attachment. The present invention has an excellent effect in that the exchange time can be as short as a few seconds. According to the present invention, it is possible to manually set the chuck attachment to be replaced on the exchange stand while the unloader is working, so setting the chuck attachment does not affect the unloader operation at all. There are advantages.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of the extraction device with the chuck attachment attached, Fig. 2 is a front view of the chuck attachment, Fig. 3 is a side view of the chuck attachment, and Fig. 4 is a diagram of the coupling device. 5 is a front view showing the relationship between the coupling device and the mounting plate, FIG. 6 is a partial sectional front view showing the coupler installed state, FIG. 7 is a plan view of FIG. 6, and FIG. 8 is a replacement. Side view of the stand, No. 9
The figure is a schematic diagram of the mounting base of the exchange table, and FIG. 10 is a partial front view of the exchange table. 1...Chuck plate, 2...Chuck attachment, 3...Mounting plate, 8...Support plate, 10
...Cylinder (coupling device) 20...Lock pin (coupling device), 26a...Male coupler (coupler half),
26b...Female coupler (half coupler), 29...
...Second fluid pressure cylinder (coupler lock device operating means), 42...Exchange table, 45...Removal table,
46...Mounting stand.

Claims (1)

[Scope of Claims] 1. In an automatic chuck attachment changing device for a take-out device for a molding machine having a chuck plate for attaching a chuck attachment, the coupling device is attached to a chuck plate provided on the main body of the take-out device. A coupling half and a half of a coupler with a locking device for fluid piping, a coupling release means of the coupling device and a coupling of the coupler for fluid piping,
A coupler detaching device for detaching the coupler, a coupled half of the coupling device attached to the chuck attachment detachable to the chuck plate, and the other half of the coupler, which are arranged separately from the extracting device main body. the coupling half of the coupling device is formed to be able to be inserted into and coupled to the coupling half, and the coupler detachment device is configured to insert the coupler half of the chuck attachment into the chuck plate. It has means for pushing into the coupler half and means for moving the locking ring of the coupler locking device to release the lock, and the exchange table includes a removal stand for holding the chuck attachment to be removed and a chuck attachment to be installed. and a mounting base for holding the chuck attachment attached to the chuck plate, and after the chuck attachment attached to the chuck plate is held on the removal base, the coupling device is released by the coupling release means to remove the coupled halves. The coupler locking device is released by the operation of the coupler detaching device, the coupler halves are made detachable from each other, and the chuck attachment is automatically detached by moving the chuck plate. The chuck plate is brought close to the upper chuck attachment and the half to be coupled is inserted into the coupled half, thereby fixing the chuck attachment to the chuck plate, and by operating the coupler detachment device. The chuck attachment is automatically attached by inserting the coupler half of the chuck attachment into the coupler half of the chuck plate and automatically activating and locking the locking device. Automatic chuck attachment exchange device for molded product ejecting device of injection molding machine.