JPH0460416B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a chuck attachment exchange device for a takeout machine.

BACKGROUND OF THE INVENTION The ejection machine of an injection molding machine requires the chuck attachment to be replaced. For this reason, the present applicant and others proposed a chuck attachment exchange device.

The chuck attachment exchange device that has been proposed in the past has a structure that is installed at a location apart from a molding machine such as an injection molding machine. This requires the factory to provide floor space specifically for the chuck attachment changer.

Conventional chuck attachment exchange devices have had the problem of arranging the molding machine as much as possible in a narrow space, and that it cannot be used if there is no space near the molding machine.

Purpose The present invention aims to solve the above-mentioned problems of the conventional chuck attachment exchange device and to provide a chuck attachment exchange device that can be installed without using special floor space.

Configuration The present invention has the above objects: a machine frame fixed to a position outside the normal take-out operation range on a molding machine fixed frame; a rotating shaft rotatably supported by the machine frame; and a rotating shaft fixed to the rotating shaft. a supporting member, two sets of chuck attachment mounting pins provided on the supporting member;
a drive device fixed to the machine frame for rotationally driving the rotary shaft, and the two sets of mounting pins are mounted at positions spaced from the rotary shaft in opposite directions at the same distance from the rotary shaft. This has been achieved by a chuck attachment changing device of a take-out machine, which is characterized in that it is configured to support a chuck attachment.

The structure and operation of the present invention will be explained in detail based on the embodiment shown in the drawings.

In FIGS. 1 and 2, a take-out machine 4 is arranged in a molding machine 3 having a fixed mold mount 1 and a movable mold mount 2 so as to be movable toward the mold on the fixed mold mount 1. .

A chuck attachment (not shown) is formed in the chuck holding part 5 of the take-out machine 4 according to the mold.
is installed. When the mold is replaced, the chuck attachment is also replaced. If the chuck attachment is large, it is heavy and difficult to handle by hand, and even if you hold it, it is difficult to center and balance it. Therefore, it is necessary to be able to automatically exchange the chuck attachment for the chuck 5 of the take-out machine.

For this purpose, the chuck attachment exchanger 6 is arranged on a fixed frame 7 near the fixed mold stand 1 of the molding machine 3 and outside the movable range of the take-out machine 4.

The chuck attachment exchanger 6 has a machine frame 8 fixed to a fixed frame 7 of the molding machine 3.

The chuck attachment exchange device 6 is shown in Fig. 3~
As shown in FIG. 5, a rotating shaft 10 is rotatably supported at upper and lower ends by bearings 9 on a machine frame 8. A drive device 11 fixed to the machine frame 8 is connected to the upper end of the rotating shaft 10.

In the illustrated example, the drive device 11 is formed as a rotary actuator that rotates the rotating shaft 10 reciprocally through 180 degrees, but it may also have a structure in which it rotates through 180 degrees through rotational movement in one direction. As a simple example of a rotary actuator, one having a structure in which a rack 13 meshing with a gear 12 fixed to a rotating shaft 10 is reciprocated by a cylinder 14 can be used.

A support member 14 is fixed to the rotating shaft 10. The support member 14 has a sleeve portion 15 that is inserted into and fixed to the rotating shaft 10, and two beams 15 and 16 that are fixed to both ends of the sleeve portion 15 and extend horizontally.
Two upper overhanging arms 17 are fixed to the upper beam 15 at both end positions symmetrical with respect to its rotational axis, each extending in a direction perpendicular to the upper beam 15 and in opposite directions. It is reinforced with reinforcing rods 18 as necessary.

Mounting bases 16a provided below both ends of the lower beam 16
In almost the same way as in the case of the upper beam 15, and parallel to the upper overhanging arm 17 of the upper beam 15, the lower overhanging arm 19 is
is fixed. Similarly, a reinforcing rod 20 can be attached to the lower extending arm 19 as required.

The upper overhanging arm 17 and the lower overhanging portion 19 have a seat 21 and a mounting pin 22 projecting from the seat 21 at the tips thereof.

An overhanging arm 1 extending to one side by upper and lower beams 15 and 16
The four mounting pins 22 provided on the extending arms 17 and 19 serve to support one chuck attachment, and the four mounting pins 22 provided on the extending arms 17 and 19 extending on the other side serve to support another chuck attachment. Used to support quatachment. As a result, the two chuck attachments can be supported by the support member 14 fixed to the rotating shaft 10 while facing each other with a rotation angle of 180°.

As shown by the chain line in FIG. 1, the chuck attachment 23 to be installed next is attached to the attachment pin located on the opposite side of the chuck attachment exchange device 6 from the take-out machine 4.

When replacing the chuck attachment, move the chuck attachment 23a attached to the chuck 5 of the extractor 4 to the chuck attachment exchanger 6.
Attach it to the mounting pin on the side facing the take-out machine 4 and separate it from the chuck 5. Then, the drive device rotates the rotating shaft 1.
Rotate 0 180°. As a result, the previously prepared chuck attachment 23 faces the chuck 5 of the take-out machine 4, and the chuck attachment 23a removed from the chuck 5 is moved to the opposite side. In this state, a new chuck attachment 23 is attached to the chuck 5 of the take-out machine, and the removed chuck attachment 23a is replaced with the next chuck attachment.

The chuck attachment 23 is formed in a structure that is held by four pins of the chuck attachment exchange device 6.

On the other hand, generally the chuck 5 of the take-out machine is the 6th chuck.
As shown in FIGS. 7 and 7, a structure is adopted in which the chuck attachment is supported at two points. A chuck plate 25 is pivotally connected to a chuck body 24 attached to the main body of the take-out machine 4 for vertical movement. That is, a pin 27 fixed to a bracket 26 fixed to the chuck plate 25 is rotatably supported by a bearing 28 on the chuck body 24. Two pins 27 are attached at appropriate intervals so as to support the chuck plate 25 at two locations. Each pin 27
A lever 29 is fixed to the lever 29, and a rod 31 of a cylinder 30 fixed to the chuck body 24 is pivotally connected to the free end of the lever 29 by a pin 32. By actuating the cylinder 70, the rod 31 moves in and out, and by rotating the lever 29, the chuck plate 25 is pivoted.

The vertical position of the chuck plate 25 is the first switch 33.
The horizontal position is detected by the second switch 34.

Two locking devices 35 are provided on the chuck plate 25 at appropriate intervals. Furthermore, an air piping connection device 36 and an electrical connection device 3 are attached to the chuck plate 25.
7 is installed.

The locking device 35 is a fixing and holding means for detachably fixing the base frame of the chuck attachment to the chuck plate 25.

8 to 10, the locking device 35 includes a locking device recess 35a fixed to the chuck plate 25 with a bolt 38 and a locking device convex portion 35b fixed to the base frame 39 of the attachment 23.

The lock device protrusion 35b has a kokeshi-shaped lock pin 41 with an annular groove 40 in the middle. A threaded portion 41 a formed at one end of the lock pin 41 is inserted into a mounting hole 39 a formed in the base frame 39 and fastened with a nut 42 .

The lock device recess 35a includes a base block 43 fixed to the chuck plate 25, and pillars 44 fixed to the four corners of the base block 43 with bolts 45.
and a cover block 47 fixed to the other end of the column 44 by a bolt 46.
has.

Two cam shafts 51 are disposed, one end of which is rotatably supported by a bearing 49 on the base block 43, and the other end rotatably supported by a bearing 50 on the cover block 47.

A gear 52 is keyed to each of the two camshafts 51.

The rotary actuator 53 is fixed to the cover block 47 so that the axis of rotation is located at the center between both camshafts 21 on a plane connecting the rotation centers of the two camshafts 51. A central gear 54 is keyed to the output shaft 53a of the rotary actuator 53. The central gear 54 is meshed with the gear 53 at the same time.

The two cotters 55 disposed opposite to each other between both camshafts 51 are slidably guided by guides 57 fixed to the base block 43 by bolts 56, respectively. A spring 58 is disposed between the two actuators 55, and the force of the spring 58 causes the two actuators 55 to move toward the eccentric cam portion 5 of the camshaft 51, respectively.
It is pressed against 1a. Kotter 55 is shown in Figure 9.
As shown in FIG. 10, the semi-annular protrusion 5 is formed in a shape that complements the lock pin 41, and is formed so that it can be closely attached to the lock pin 41 in a shape that follows the shape.
It has 9. The protrusions 59 of both the lockers 55 are formed so as to sandwich the annular groove 40 of the lock pin 41 from both sides.

In the standby state, the cotter 55 is held away from the lock pin 41, as shown in the upper halves of FIGS. 8 and 9. In this state, lock pin 4
1 is inserted into the space between the chuck starters 55, and the base frame 39 of the chuck attachment is brought into contact with the chuck plate 25.

In this state, the rotary actuator 5
3 is operated, causing the central gear 54 to rotate, thereby causing the gear 52 to rotate. As an example, the gear 52 is rotated by a rotary actuator 53 that rotates 270°.
That is, the camshaft 51 is rotated approximately 180 degrees.
The gear 52 and the central gear 54 rotate the camshaft 51 by rotation of the rotary actuator 53 at a predetermined angle.
The number of teeth is selected to allow 180° reciprocating rotation.

When the camshaft 51 rotates 180°, the eccentric cam portion 51a
As a result, the lockter 55 is moved toward the locking pin 41 against the force of the spring 58, and the protrusion 59 fits into the groove 40. This results in a locked state, and the base frame 39 is fixedly held on the chuck plate 25.

The eccentric cam part 51a rotates due to the reverse movement of the rotary actuator 53, and the spring 58
Due to the pressing action, the lockter 55 follows the eccentric cam portion 51a, moves away from the lock pin 41, and releases the lock. In this state, the base frame 39 can be freely attached to and removed from the chuck plate 25.

The air piping connection device 36 provided on the chuck plate 25 is mounted on a base 63 fixedly supported by bolts 62 on a bracket 60 fixed to the chuck plate 25 with bolts 61, as shown in FIGS. 11 to 13.
has. The right half of FIG. 11 shows the pipe connected state, and the left half shows the released state.

A double acting cylinder 64 is fixed to the base 63.
The base plate 6 is attached to the piston rod 65 of the double acting cylinder 64.
6 is fixed by a bolt 67, and the base plate 66 moves up and down in the figure in accordance with the movement of the piston.

The finger levers 6 are attached to both ends of the base plate 66 by pins 68.
9 is rotatably pivoted. Two opposing finger levers 69 act as a pair of fingers, each having fingers 70 for holding the base frame 39 therebetween.

A finger spring 72 is connected to the finger lever 6 between a bracket 71 attached to the base plate 66 and one end of the finger lever 69.
9 is stretched so as to press and hold it in the operating position (left half of the figure).

A holder 73 is fixed to the base 63 with bolts 78, and a pin 74 is rotatably supported on the holder 73. The pin 74 has a release lever 7
5 is fixed. The release lever 75 may also be configured to be rotatably supported by a pin fixed to the holder 73.

One release lever 75 is provided for each finger lever 69, is formed in an L shape, and has a contact portion 75a that contacts the finger lever 69 and a support portion 75b that is supported by the pin 74.

An actuating rod 76 is inserted through the base plate 63 so as to be able to slide up and down, and its lower end is supported by abutting against the support portion 75b of the release lever 75.

A spring 77 is tensioned between the abutting portions 75a of the two release levers 75 corresponding to the pair of finger levers 69. The springs 77 may be stretched between each release lever 75 and the base 63 or the holder 73, unlike the illustrated example.

Piping holes are provided in the base 63 as necessary.
A piping coupler half 79 is screwed into the piping hole and fixed with a nut 80. This coupler may be any commonly available locking coupler, and the first half 79 is fixed to the base 63, and the second half 81, which is removable, is fixed to the base plate 85 of the chuck attachment. Ru. In the illustrated example, eight second halves 81 are fixed to the plate 85 in two rows of four, and eight first halves 79 to which the second halves 81 are inserted and locked at the same time are attached to the base 6.
3, that is, it is fixed to the chuck plate 25.
Although the free end of each first half 79 is freely insertable, a lock release ring 8 provided on the first half 79
2 is supported by the support portion 75b of the release lever 75, and the lock release plate 83 has a hole with a diameter that cannot be inserted into the lock release plate 83.

When the cylinder 64 is operated in a direction that moves the piston downward in the figure, the state shown in the right half of FIG. 11 is achieved. This is a standby state.

The plate 85 is supported by the base frame 39 by support pins 86 and springs 87 as will be described in detail later.

When the plate 85 is placed between a pair of opposing fingers 70 of the finger lever 69, the piston of the cylinder 64 is moved upward. The upward movement of the piston 65 causes the base plate 66 to rise, and the actuating rod 76 pressed down by the base plate 66 is pushed up by the support portion 75b of the release lever 75, which is rotated by the force of the spring 77 and moved to the standby position. The actuating rod 76 moves up following the rise of the base plate 66 until the support portion 75b returns to the predetermined position, but after reaching the predetermined position, it is no longer necessary to follow the movement. Therefore, when the base plate 66 is in its highest raised position, there is a distance l between the lower surface of the base plate 66 and the upper end of the actuating rod 76.

When the release lever 75 rotates as the actuation rod 76 rises, the contact portion 75a moves away from the finger lever 69. Since the finger lever 69 is pressed against the contact portion 75a of the release lever 75 by the finger spring 72, the finger lever 69 moves following the rotation of the release lever 75, and the plate 85
is held between both finger levers 69. After clamping, as the base plate 66 rises due to the rise of the piston 65, the finger lever 11 also rises with the plate 85 being clamped. Coupler device 36 fixed to plate 85 as plate 85 rises
a second half 81 of is inserted into the first half 79;
When the plate 85 reaches the predetermined position, the second half 8
1 is locked into the first half 79. This state is shown in the left half of FIG. At this time, the lock release plate 83 is separated from the lock ring 82 and is supported by the support portion 75b.

When replacing the chuck attachment, the piston 65 of the cylinder 64 is moved downward. While the base plate 66 is lowered by a distance l due to the lowering of the piston 65, the finger lever 69 separates from the plate 85 and descends. When the finger lever 69 descends by a distance l, the base plate 66 comes into contact with the actuating rod 76, and the actuating rod 76 6
It is lowered along with the lowering of 6. As the actuating rod 76 descends, the release lever 75 is pushed around, the free end of the support portion 75b pushes up the lock release plate 83, and at the same time the abutment portion 75a pushes the finger lever 69 to rotate it.

When the release lever 75 is rotated a predetermined amount, the lock release plate 83 pushes up the lock ring 82 to release the coupler lock, and at this time the finger lever 69 is in a position to release the plate 39. Unlocking the couplers releases the second half 81 of each coupler from the first half 79, and the plate 8
5, that is, the base frame 39 is detached from the chuck plate 25 by a separately provided actuating means or, if necessary, by its own weight.

Guide bar 8 for smooth movement of base plate 66
4 can also be fixedly arranged on the cylinder 64 or the substrate 63.

Chuck attachment base frame 39
As shown in FIGS. 14 and 15, support arms 88 are fixed to both ends. a plate 85 to which the second half 81 of the coupler of the pipe connection device 36 is fixed;
As shown in FIGS. 16 and 11, the head 86a of the support pin 86 is slidably supported by a support pin 86 screwed to the center of the base frame 39.
This prevents it from falling off. Plate 85 is pressed against head 86a by spring 87. Second
The half body 81 is connected to an actuator (not shown) of the chuck attachment by a pipe (not shown).

Support holes 89 are formed near both ends of each of the support arms 58 so that they can be inserted into attachment pins 22 provided on the overhanging arms 17 and 19 shown in FIGS. 2 to 5.

Furthermore, lock pins 41 are fixed at two locations on both ends of the base frame 39 as described above, and a connector plug 37 as an electrical connection device is fixed thereto (FIG. 17).

As shown in FIG. 1, the chuck attachment 23 having the base frame 39 configured as described above opens the support hole 89 of the support arm 88 to attach the extending arms 17, 19 of the chuck attachment exchange device 6. When inserted into the pin 22, it is supported at four points.

When replacing the chuck, the chuck plate 25 of the chuck main body 24 approaches the chuck changing device 6, and the support arm 88 of the chuck attachment 23 moves toward the extended arms 17,1.
It is inserted into the mounting pin 22 of 9. The cylinder 64 of the pipe connection device 36 is then actuated to unlock the coupler, and the rotary actuator 53 of the locking device 35 is actuated to release the coupler 55.
is moved to the disengaged position and released from the lock pin 41. In this state, the chuck body 24 moves backward due to the movement of the take-out machine, and the chuck plate 2
5 is separated from the base frame 39 of the chuck attachment 23. At this time, connector plug 3
7 is also separated.

When the chuck attachment exchange device 6 is rotated 180° and the chuck main body 24 is moved closer, the locking device concave portion 35a of the chuck plate 25 engages with the locking device convex portion 35b, and the lock pin 41 engages with the locking device convex portion 35b. 55 and the connector plug 37 is inserted into the mating member of the electrical connection device and the first half 7 of the coupler of the piping connection device 36.
9 approaches the second half 81.

In the piping connection device 35, a plate 85 attached to the base frame 39 is movably supported while being pressed by a spring 86, and there is sufficient space between the lock pin 41 and its insertion space. Therefore, the chuck plate 25 and the base frame 39 can be easily aligned even if they are not accurately positioned and brought into close contact with each other. Even if there is a slight misalignment between the booth frame 39 and the chuck plate 25 in the three-dimensional directions of vertical, horizontal, and height, the difference is sufficiently absorbed, and the cylinder 64 of the piping connection device and the rotary actuator of the locking device The chuck attachment 23 can be reliably fixed to the base plate 25 by the operation of the eater 53. Thus, the chuck body 24
As a result of this movement, the chuck attachment 23 is separated from the chuck attachment exchange device 6.

Effects The present invention facilitates chuck attachment replacement in a narrow space above a molding machine.

Since the structure of the chuck attachment exchange device is simple and the work of attaching and detaching the chuck attachment is easy, it becomes possible to use even large and heavy chuck attachments effectively. Ta.

[Brief explanation of the drawing]

FIG. 1 is a partial front view of a molding machine of a chuck attachment exchange device for a take-out machine according to the present invention, FIG. 2 is a left side view, FIG. 3 is a front view of the chuck attachment exchange device, and FIG. The figure is the left side drawing, Figure 5 is a plan view, Figure 6 is a side view of the chuck body of the extractor,
7 is a front view, FIG. 8 is a front view showing the right half of the locking device in cross section, FIG. 9 is a cross-sectional view of FIG. 8, FIG. 10 is a cross-sectional view of FIG. 8, and FIG.
The figure is a partially cutaway plan view of the piping connection device, Fig. 12 is a right side view, Fig. 13 is a partially cutaway front view, Fig. 14 is a front view of the base frame of the chuck attachment, and Fig. 15 is a right side view. Figure 16 is a sectional view of Figure 14, and Figure 17 is a cross-sectional view of Figure 14.
FIG. DESCRIPTION OF SYMBOLS 1... Fixed mold mount, 2... Movable mold mount, 3... Molding machine, 4... Take-out machine, 5... Chack, 6... Chuck attachment exchange device, 7
... Fixed frame, 8 ... Machine frame, 9 ... Bearing, 1
0...Rotating shaft, 11...Driving device, 14...Supporting member, 22...Mounting pin.

Claims (1)

[Claims] 1. A machine frame fixed at a position outside the normal take-out operation range on the molding machine fixed frame, a rotating shaft rotatably supported by the machine frame, a support member fixed to the rotating shaft, and the supporting member. It has two sets of chuck attachment mounting pins provided on the member, and a drive device fixed to the machine frame for rotationally driving the rotating shaft, and the two sets of mounting pins rotate around the rotating shaft. 1. A chuck attachment exchange device for a takeout machine, characterized in that the chuck attachments are supported at positions spaced the same distance from a rotating shaft in opposite directions.