JPH0586899B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an exchange device for automatically exchanging a chuck mechanism of a workpiece take-out machine provided at the upper part of an injection molding machine.

[Prior Art] Conventionally, for example, as disclosed in Japanese Patent Application Laid-Open No. 60-242024, injection molded products (hereinafter simply referred to as workpieces) have been molded through an injection mold in an injection molding machine. A technique is known in which a chuck mechanism is used to chuck and automatically take out the mold from the mold. By using such a chuck mechanism, the workpiece released from the mold via the reject pin is reliably removed from the mold by this chuck mechanism, and as the chuck mechanism moves, the workpiece is removed from the mold through the reject pin. It will be transported to.

[Problems to be Solved by the Invention] Here, a single injection molding machine can mold many different types of workpieces by replacing the mold. Here, the number of chuck mechanisms for taking out the workpiece is required depending on the shape of the workpiece, and when the mold is replaced, this chuck mechanism also needs to be replaced in the takeout machine. It turns out. However, this chuck mechanism replacement is performed manually, and problems have been pointed out in terms of work efficiency.

This invention was made in view of the above-mentioned problems, and the purpose of this invention is to maintain the chuck mechanism to be used from now on and to remove the previously used chuck mechanism, if any, when the mold is replaced. can be performed at the same (second) station, thereby improving the automatic exchangeability of the chuck mechanism, and reducing the area occupied by the workpiece take-out machine that moves the chuck mechanism to a predetermined position relative to the opposite part of the mold for taking out the product. It is an object of the present invention to provide a workpiece take-out machine changing device for an injection molding machine that can be minimized.

[Means for Solving the Problems] In order to solve the above-mentioned problems and achieve the purpose, a workpiece take-out machine changing device for an injection molding machine according to the present invention is provided to be replaceable with respect to an injection molding machine. A workpiece take-out machine changing device for an injection molding machine that automatically exchanges a plurality of molds for molding different products, and a plurality of chuck mechanisms for taking out products from the molds after molding. A workpiece take-out machine is supported by a three-dimensional slide mechanism disposed at the top of an injection molding machine for relative driving in the vertical direction, and has a lock mechanism that makes the chuck mechanism detachable. a first replacement station for temporarily holding a chuck mechanism to be removed to be replaced from the machine; and a rotation mechanism rotatably driven to a second replacement station for temporarily holding a next chuck mechanism to be newly installed. A chuck replacement mechanism is provided.

[Function] In the workpiece take-out machine exchange device for an injection molding machine configured as described above, the second exchange station holds in advance the next chuck mechanism to be newly attached to the workpiece take-out machine, and Leave the first exchange station empty. When replacing the chuck mechanism, the chuck mechanism removed from the workpiece unloading machine for replacement is transferred to the first replacement station and held there, and a new chuck mechanism is received from the second replacement station. As a result, the exchange operation is automatically performed.

[Embodiment] Below, the structure of an embodiment of a workpiece take-out machine changing device for an injection molding apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in a plan view in FIG. 1, the injection molding apparatus 10 of this embodiment includes a pair of injection molding units 12 and 14 arranged in parallel and spaced apart from each other.
and disposed on the outside of these injection molding units 12, 14, respectively.
A pair of preheating stations 18 and 20 are used to keep the injection molds 16 to be used next (hereinafter simply referred to as molds) in a preheated state.
Then, the mold 16 disposed between both injection molding units 12, 14, which has been used in these injection molding units 12, 14 and is removed in order to be replaced with the next mold 16', is moved and once placed. A mold mounting station 22 to be placed, a mold picking up station 24 provided at a position spaced downward from the mold mounting station 22 in the figure, and this mold mounting station 22 and the mold picking up station 24. The mold 16 that was exchanged and taken out between
It is generally equipped with an automatic guided vehicle 26 that moves back and forth with a work W placed thereon, and a take-out device 28 that is disposed on each injection molding unit 12, 14 and takes out the injection-molded workpiece W and carries it out. .

Here, each take-out device 28 is shown in FIG.
As shown in the right side view of the figure, a take-out mechanism 30 takes out the workpiece W molded in the mold 16 installed in each injection molding unit 12, 14;
As shown in Fig. 1 again, the taken out workpiece W
It is provided with a conveyor 32 for receiving the material from the take-out mechanism 30 and conveying it to the unillustrated discharge mechanism. Moreover, in this take-out device 28, it is attached corresponding to each mold 16,
A chuck mechanism 34 is provided which is formed to match the shape of each injection-molded workpiece W and is used to exclusively chuck this workpiece W, and this chuck mechanism 34 can be replaced when the mold 16 is replaced. A replacement mechanism 36 is provided.

Each injection molding unit 12, 14 uses a mold 16 consisting of a movable mold and a fixed mold to inject molten synthetic resin into the mold 16 at a predetermined high pressure. This is a conventionally well-known configuration in which a workpiece W of a predetermined shape is formed according to the shape of a cavity defined between a mold and a fixed mold,
A description thereof will be omitted along with the configuration of the mold 16.

Below, the configurations of other components of the injection molding apparatus 10 described above will be sequentially explained.

First, the preheating stations 18 and 20,
These are the corresponding injection molding stations 12,
14, the mold 16' to be used next is kept on standby, and during this waiting, the mold 16' is
6' is preheated, and when it is replaced and installed in the injection molding station 12, 14,
It is provided for immediate use. In other words, in the injection molding apparatus 10, these preheating stations 18, 20 are arranged.

These preheating stations 18 and 20 are configured in a symmetrical structure, and the configuration of the preheating station 18 located on the left side in FIG. 1 is shown in FIGS. 3 and 4.
As shown in detail in the figure, a base 38 is provided on which the mold 16 that has been transported by a lifting and transporting mechanism such as a crane is placed. This base 38
A fixed positioning stand 40 extending in the direction shown by arrow A is fixed to one side of the upper side. On the other hand, on the base 38, a movable positioning table 42 is disposed at a position separated from the fixed positioning table 40 by a predetermined distance so as to be movable forward and backward with respect to the fixed positioning table 40. This predetermined interval is set to be large enough for the largest size mold 16 used in the injection molding apparatus 10 to be placed here. Further, a hydraulic cylinder mechanism 44 is connected to the movable positioning table 42, and is configured to be driven forward and backward by this.

With the above configuration, the mold 16 once placed on the base 38 is moved by the movable positioning table 42 that is moved by the activation of the hydraulic cylinder mechanism 44, so that the reference plane defined by one side of the mold 16 is aligned. It is moved until it comes into contact with the fixed positioning table 40. In this way, the position of the mold 16 at the preheating station 18 is accurately positioned.

Further, below the mold 16 positioned in this manner, a connection port 46 is provided which is connected to an inlet/outlet of a heating circulation path (not shown) of the mold 16. This heating circulation path is installed at the time when the mold 16 is installed in the injection molding units 12, 14.
By circulating the high temperature medium here, the mold 1
This mold is provided to heat the area around the cavity 6 so that the molten resin can reach every corner of the cavity, and when this mold 16 is placed on the preheating station 18, The entire mold 16 is preheated by being connected to the above-mentioned connection port 46 and circulating a high heat medium there.

Note that the positions of the entrances and exits of the heating circulation path of this mold 16 are set to be the same for all molding molds 16 when this mold 16 is positioned as described above. .

On the other hand, a conveyance path 48 is provided between the preheating station 18 and the mold placement station 20 for conveying the mold 16 from the preheating station 18 through the injection molding unit 12 to the mold placement station 20. It is being That is, this conveyance path 4
8 is below the mold 16 positioned on the preheating station 18, and at positions corresponding to both sides thereof, along the direction indicated by the reference numeral A, that is, the direction in which both the positioning tables 40 and 42 extend. Then, mold 16
A plurality of transport rollers 50 are rotatably provided for transporting. These conveyance rollers 50 are
As shown in the figure, it is connected to be rotated by the driving force of a drive motor 52 disposed below it via a drive chain whose details are not shown.

With the above configuration, when replacing the mold in order to change the type of workpiece W to be molded in the injection molding unit 12 currently in use, the mold changing operation is performed as follows. .

In other words, the new mold 1 that is about to be replaced
6', the connection port 46 is removed and replaced (i.e.
The mold 16 (which has been used) is removed from the injection molding unit 12 and placed on the conveying path 48. Thereafter, the drive motor 52 is started, and the mold 16 removed from the injection molding unit 12 is transported to the exchange station 22, and the mold 16' preheated at the preheating station 18 is transferred to the injection molding unit 12. It will be transported to. Then, this preheated new mold 16' is installed in the injection molding unit 12, thereby completing the mold exchange operation.

Here, a mold to be used next is lifted and transported from a stocker (not shown) via a crane (not shown) to the preheating station 18, and a preheating operation is started for this new mold 1. At the same time, at the mounting station 22, as will be described later, the mold 1 that has been replaced and removed is
The transfer operation to the mold picking up station 24 of No. 6 is started.

Moreover, in the above-mentioned mounting station 22, an automatic guided vehicle 26 that can move back and forth between it and the mold picking up station 24 is provided. As shown in FIG. 5, this automatic guided vehicle 26 includes a transport roller 50 for transporting the mold 16 from the residual heat station 18 on the left side of the figure to this point.
and a conveyance roller 50 for conveying the mold 16 from the preheating station 18 on the right side of the figure to here, and a carry-in roller 54 is rotatably provided at the upper part in a continuous state.

This carry-in roller 54 is rotationally driven by another drive motor 56 disposed within the automatic guided vehicle 26, and this drive motor 56 is configured to be reversibly rotatable. In this way, no matter which preheating station 18 or 20 the mold 16 is transported from, the mold 16 is transferred to the mounting station 22 by rotationally driving the carry-in roller 54 in the corresponding direction. This ensures that the vehicle is taken onto the automatic guided vehicle 26 located there.

Here, as mentioned above, this mounting station 22 is located just above the two injection molding units 12, 14.
It is arranged so that it is located between. This configuration allows this mounting station 22 to receive molds 16 that have been replaced and removed from both injection molding units 12, 14.
In this way, in this embodiment, there is no need to provide two mounting stations, and the installation space in the factory can be used effectively, allowing automatic mold exchange to be carried out efficiently. will be done.

On the other hand, as described above, the mounting station 22
The mold 16 transported to the automatic guided vehicle 26 is
A pick-up station 2 is placed at a position spaced apart from the loading station 22 in a direction perpendicular to the direction indicated by arrow A.
As mentioned above, each injection molding unit 12, 14 is provided with a take-out device 28, and these take-out devices 28 are used to remove the mold from the placing station 22. This is because, as a result of the upper space being closed, it becomes impossible to directly suspend the mold 16 upward from the mounting station 22 using a crane or the like.

This automatic guided vehicle 26, as shown in FIG.
It is a self-propelled type equipped with a drive motor 58 as a transport drive source inside, and as shown in FIG. rail 6
0 is placed on the foundation. These rails 6
0 is set to extend away from the mounting station 22, that is, along a direction perpendicular to the direction indicated by the arrow A mentioned above.

In this way, the mold 16 placed on the automatic transport vehicle 26 that has traveled from the placement station 22 to the pick-up station 24 via the pair of rails 60 stops at the pick-up station 24, and is moved by a crane (not shown) or the like. Then, the mold 16 is lifted up and conveyed to a not-shown skirt, where it is stored and kept on standby.

Next, the configuration of the workpiece take-out device 28 for taking out the workpiece W molded in each injection molding unit 12, 14 will be described in detail with reference to the drawings from FIG. 6 onwards.

First, the overall configuration of the take-out device 28 will be described below with reference to FIGS. 6 to 8.

The take-out device 28 is disposed on both injection molding units 12 and 14, respectively, and has a symmetrical structure. 2
Only 8 will be explained.

This take-out device 28 is disposed on the upper surface of the corresponding injection molding unit 12, as shown in the front shape in FIG. 6, the upper surface shape in FIG. 7, and the left side shape in FIG. It is equipped with a take-out mechanism 30. The take-out mechanism 30 is composed of a three-dimensional slide drive mechanism 70, which will be described later, and the chuck mechanism 34, which is slid forward and backward, left and right, and up and down, respectively, through the three-dimensional slide drive mechanism 70. . Also, a chuck mechanism 34 provided in this take-out mechanism 30
A chuck exchange mechanism 36 for exchanging the chuck according to the mold 16 to be exchanged is connected to the ejecting mechanism 3.
0 on the injection molding unit 12.

The three-dimensional slide drive mechanism 70 described above is the eighth
As shown, the corresponding injection molding unit 12
The support body 72 is fixed in an upright position on the upper surface of the
From the upper end of this support body 72, the direction perpendicular to the plane of the paper in FIG. 8, that is, the left-right direction in FIGS. ) and a left and right support arm 74 extending along the left and right support arms 7.
4, and a left and right slide block 76 supported slidably along the left and right direction, and a front and rear support arm extending from the left and right slide blocks 76 in the left and right direction in FIG. 8, that is, in the front and back direction in FIG. 78, a front-rear slide block 80 supported slidably along the front-rear direction by the front-rear support arm 78, and a vertical slide block 80 supported slidably along the up-down direction in FIG. 6 by the front-rear slide block 80. 82
It is equipped with The above-mentioned chuck mechanism 34 is configured to be detachably attached to the lower end of the vertical slide block 82 via a lock mechanism 90 which will be described later.

Here, the left and right slide blocks 76 and the front and rear slide blocks 80 are connected to hydraulic cylinder mechanisms (not shown), respectively, and are configured to slide in the left-right direction and the front-rear direction, respectively, in response to activation of these hydraulic cylinder mechanisms. has been done. On the other hand, the vertical slide block 82 is attached to the lower end of a piston rod 86 that is reciprocated along the vertical direction of a hydraulic cylinder mechanism 84 that is fixed to the upper surface of the front and rear slide block 80 in an upright state.

On the other hand, as shown in FIG. 8, the mold 16 in the injection molding unit 12 is installed with a fixed mold fixed to the mold mounting surface at the mark S. When injection molding of a predetermined workpiece W is finished using this mold 16, the movable mold is separated from the fixed mold. Here, as shown by the dashed line in the figure, the workpiece W is attached to the movable mold and is pulled away from the fixed mold as the movable mold moves away. In this way, in order to be able to take out the workpiece W that has been separated from the fixed mold and attached to the movable mold, the left and right slide blocks 76, the front and rear slide blocks 80, and the top and bottom slide blocks 82 have their respective slides. The stroke is prescribed.

Since this three-dimensional slide drive mechanism 70 is configured as described above, when the workpiece W is taken out from the mold 16 after the injection molding operation, the chuck mechanism 34 attached to the tip of the vertical slide block 82 is first inserted from above between a fixed mold and a movable mold that are separated from each other, and then the vertical slide block 82 is slid toward the movable mold. By this operation, the chuck mechanism 34 engages with the workpiece W attached to the movable mold and chucks it.

On the other hand, when this chuck operation is completed, a reject pin (not shown) in the movable mold is pushed out, and the workpiece W attached to the movable mold is pushed away, and the three-dimensional slide drive mechanism 70
is activated and slides the chuck mechanism 34 in the direction of separating it from the movable mold. In this way,
The work W is released from the movable mold while being chucked by the chuck mechanism 34.

Thereafter, the three-dimensional slide drive mechanism 70 is further driven, and the chucked work W is transported to the base end of the transport conveyor 32 shown in FIG. 1, and discharged there. In this way, a series of operations for taking out the workpiece W is completed.

Next, the configuration of the above-mentioned transport conveyor 32 will be explained with reference to FIGS. 9 to 11. The top surface of this conveyor 32 is shown in FIG.
The workpiece W is placed as shown in the left side shape in FIG. 10 and the front shape in FIG. 11, respectively.
A pair of workpiece conveyance belts 84 are provided to convey the workpiece W toward the tip, and a runner, spool, gate, etc. attached to the workpiece W is disposed between the pair of workpiece conveyance belts 84. A pair of attachment conveyance belts 86 are provided for conveying the kimono in a state separated from the workpiece W.

Here, both the workpiece conveyance belts 84 are set to have a base end higher than the distal end, and the attached matter conveyance belt 86 is set to have a slope that is higher than the distal end thereof.
It is set at a lower overall position and approximately horizontal. Further, a receiving tray 88 for temporarily receiving the deposits separated from the workpiece W is attached on the base end of the deposit conveying belt 86.

Note that the chuck mechanism 34 described above includes a mold 16.
A cutting mechanism (not shown) is provided for cutting off the deposits that were integrally connected to the workpiece W in a state in which it was released from the mold. Then, when the workpiece W is transferred to the transport conveyor 32 via the chuck mechanism 34, this adhered material is cut off by the cut mechanism while the workpiece is placed on the base end of the transport conveyor 32. , will be cut off onto the tray 88 in an independent state.

Here, the above-mentioned chuck mechanism 34 controls the type of workpiece W to be injection molded, in other words, the type of workpiece W to be injection molded, in other words,
The position of the chuck changes depending on the type, so the shape also differs depending on the type.Currently,
Mold 16 installed in injection molding unit 12
A chuck mechanism 34 shaped accordingly is removably attached to the upper and lower slide blocks 82 via a lock mechanism 90.

On the other hand, in accordance with the above-mentioned replacement work of the mold 16,
In order to be able to efficiently attach the corresponding chuck mechanism 34 to the upper and lower slide blocks 82, as shown in FIG. The above-mentioned replacement mechanism 36 is provided.

Below, the configurations of the above-mentioned replacement mechanism 36, chuck mechanism 34, and lock mechanism 90 will be sequentially explained.

First, the replacement mechanism 36, as described above,
New chuck mechanism 3 that will be installed in the future
4' is attached to the first mounting station 36a, and the chuck mechanism 34, which was removed for replacement after being fixed to the vertical slide block 82 via the lock mechanism 90, is recovered and attached to the second mounting station 36a. and a mounting station 36b.

Further, this mounting mechanism 36 is mounted on the injection molding unit 12 in a three-dimensional manner with upper and lower slide blocks 82 placed between them, as shown in FIGS. A rectangular parallelepiped-shaped frame 92 is fixed at a position facing the slide mechanism 70. A rotary support member 94 is disposed within the frame 92 so as to be rotatable around its central axis. This rotation support member 94
The above-mentioned first
and second mounting stations 36a, 36b.
is installed.

Here, the rotation support shaft 96 of this rotation support member 94
The upper end protrudes above the frame 92, and a pinion gear 98 is fixed coaxially to this protruding end. On the other hand, an air cylinder 100 as a driving source is disposed on the upper surface of the frame 92.
Piston rod 102 of this air cylinder 100
A rack 104 that meshes with the above-mentioned pinion gear 98 is attached. This piston rod 102 rotates the pinion gear 98, that is, the rotational support member 94 by 180 degrees when compressed air is introduced into the air cylinder 100.
The amount of protrusion is specified.

Further, when compressed air is not introduced into the air cylinder 100 and the piston rod 102 is retracted, the second mounting station 36b
is set to be placed at a position opposite to the vertical slide block 82. When compressed air is introduced into the air cylinder 100 in this manner, the rotary support member 94 is rotated 180 degrees so that the first mounting station 36a faces the vertical slide block 82.

Next, the first and second mounting stations 3
The configurations of 6a and 36b will be explained in detail with reference to FIG. Note that since these first and second attachment stations 36a and 36b have the same configuration, only the configuration of the first attachment station 36a will be described below.

This first mounting station 36a attaches to the chuck master 10 of the chuck mechanism 34.
6 is held at the four corners. In particular, this first mounting station 36a
A pair of attachment arms 1 extend horizontally in parallel to each other at both upper and lower ends of the rotation support member 94.
08a and 108b. A retaining mechanism 110, which will be described in detail below, is attached to both ends of each attachment arm 108a, 108b. In other words, four holding mechanisms 110 are arranged corresponding to the four corners of the chuck master 106, respectively.

Here, the chuck master 106 is set to a common size in the various chuck mechanisms 34. As a result, the holding positions at the four corners of the chuck master 106, ie, the positions at which the four holding mechanisms 110 are arranged, are common to all the chuck mechanisms 34.

Each retention mechanism 110 has a chuck master 106
Through holes 106a formed in four corners 106b of
By grasping the peripheral portion of the through hole 106a from both sides while being inserted into the hole 106a, each corner portion 106b is detachably held, and they are all formed in the same configuration.

Specifically, each retention mechanism 110 has a respective attachment arm 108a, 108b, as shown in FIG.
At each end, projecting horizontally from this point,
Air cylinders 112 installed parallel to each other
It is equipped with A mounting plate 114 is fixed to the tip of the air cylinder 112, and a pair of guide rods 118a extend from the mounting plate 114 in the same direction as the movement direction of the piston rod 116 of the air cylinder 112. ,11
8b is attached.

A slide guide 120 is attached to the tip of the piston rod 116 described above, and this slide guide 120 is connected to a pair of guide rods 118.
a and 118b, it is supported so as to be slidable along the extending direction thereof. Furthermore, elongated holes 122a and 12 are provided at both ends of the slide guide 120, extending along a direction perpendicular to the direction in which these guide rods 118a and 118b extend.
2b is formed.

A pair of locking members 126a, 126b are provided with their proximal ends inserted through the elongated holes 122a, 122b via rollers 124a, 124b, respectively. Both of the locking members 126a, 126b are arranged along the guide rods 118a, 118b, so that the distal ends thereof are connected to the guide rods 118a, 118b.
It extends to a state where it protrudes a predetermined distance from 18b.

Here, locking pieces 128a, 128b are attached to the tips of these locking members 126a, 126b in a state of being bent inwardly at 90 degrees. Moreover, the inner surfaces of these locking pieces 128a and 128b that face each other are inclined so as to open outward. Further, each locking piece 128a, 128b is elastically held in this 90 degree bent state, and is allowed to fall further inward;
Falling outward is prohibited. In this manner, the corner portions 106b of the chuck master 106 once locked inside these locking pieces 128a, 128b are respectively held at this locking position. Also, both locking members 126a, 126b
This holding state is released by being biased outward.

On the other hand, a cam member 130 is provided at the tips of both guide rods 118a, 118b to bias the locking members 126a, 126b outward as they protrude.
is attached in a state that allows the slide guide 120 to slide by a predetermined amount. This cam member 1
A pair of cam grooves 132 are arranged in series on both sides of the cam groove 30.
That is, a total of four cam grooves 132 are formed. Each cam groove 132 is connected to the piston rod 11.
6, and a second cam groove portion 132b that is formed continuously at the tip of the first cam groove portion 132a and slopes diagonally outward. It is equipped with

Here, a roller 134 inserted into a corresponding cam groove 132 is rotatably supported by locking members 126a and 126b located on both sides of the cam member 130, respectively. Moreover, both locking members 126a,
126b includes a pair of coil springs 136a and 136b that bias them in a direction that attracts them to each other.
36b is stretched. Additionally, the cam member 130
An insertion pin 138, which is inserted into the through hole 106a of the chuck master 106 described above, is protruded from the tip of the chuck master 106.

The insertion pin 138 has a length sufficient to pass through the corresponding through hole 106a while the corner 106b of the chuck master 106 is locked to the tips of the locking members 126a, 126b, as shown in the figure. It is set to In addition, this insertion pin 138
The tip is formed into a tapered shape to facilitate insertion into the through hole 106.

Since each holding mechanism 110 is configured as described above, when compressed air is not introduced into the air cylinder 112, the piston rod 116
is urged to be drawn inward, and as a result, the piston rod 1 is pulled inwardly through the mounting plate 114.
A pair of locking members 126a, 12 connected to 16
6b, these rollers 134 come into contact with the end edge of the first cam groove portion 132a of the corresponding cam groove 132 on the base end side. As a result, the locking pieces 128a and 128b attached to the tips of the locking members 126a and 126b are set to hold each corner 106b of the chuck master 106, in other words, to a state where they are prohibited from opening. It turns out.

On the other hand, when compressed air is introduced into the air cylinder 112, the piston rod 116 is pushed outward. As a result, the pair of locking members 126a and 126b connected to the piston rod 116 via the mounting plate 114 are first in a state in which these rollers 134 pass through the first cam groove portion 132a of the corresponding cam groove 132. , is similarly pushed forward, and then the second cam groove portion 132
The coil springs 136a, 136b along the inclination of the coil springs 136a and 136b reach and pass through
is biased outward against the urging force of. As a result, the locking pieces 128a and 128b attached to the tips of both the locking members 126a and 126b are further spaced apart from each other and are not engaged with the corner 106b of the chuck master 106, in other words, the locking pieces 128a and 128b are in an open state. The state will be set.

Here, when this holding mechanism 110 is in the above-mentioned holding state, the chuck master 10
6, the locking mechanism 9 of the vertical slide block 82
0 approaches, the insertion pins 138 of the corresponding holding mechanism 110 are inserted into the through holes 106a formed at each corner 106b of the chuck master 106, and the positioning is performed. Then, when approaching further, each corner 106b has a corresponding holding mechanism 110.
The locking pieces 128a and 128b are engaged with each other. Then, in response to this engagement, both locking pieces 1
28a and 128b are folded inward and each corner 1
06b will be taken inside these locking pieces 128a, 128b by getting over them.

On the other hand, the corner portion 106b is connected to both the locking pieces 128a, 1
When the locking pieces 128a and 128b are pushed inward and crossed over, the locking pieces 128a and 128b return to the state where they are erected at 90 degrees from the locking members 126a and 126b due to their own biasing force. In this way, check
Each corner 106b of the master 106 is each retained by a corresponding retention mechanism 110 such that the chuck master 106 is attached to the first mounting station 36.
It will be securely attached to and held in a.

Next, the structure of the chuck mechanism 34 for chucking the workpiece W will be explained with reference to FIGS. 15 and 16.

As described above, this chuck mechanism 34 includes a chuck member 140 (shown by a dashed line in FIG. ) and a chuck master 106 formed in a shape and size common to all chuck members 140.

This chuck master 106 has a pair of mounting arms 142a and 142b that extend in the vertical direction and are arranged parallel to each other with a predetermined distance apart.
In order to connect the central portions of these mounting arms 142a, 142b to each other, a main plate 144 spanned in the lateral direction and the upper and lower ends of these mounting arms 142a, 142b are connected to each other. A pair of cross members 146 spanned laterally for reinforcement.
a, 146b.

Here, the four corners 106b of the chuck master 106 are attached to each mounting arm 142a, 142.
defined from each end of b. That is, each end (each corner) of each mounting arm 142a, 142b
The above-mentioned through holes 106a are formed in each of the holes 106a.

Also, the surface of the main plate 144 mentioned above (the surface that appears on the front in the illustrated state)
A pair of handle members 148 are attached to both left and right sides of the handle member 148, to which all chuck members 140 formed to match the shapes of the workpieces W formed by various molds 16 are attached. On the other hand, the first
As shown in FIG. 6, upper and lower slide blocks 82 of the three-dimensional slide mechanism 70 are provided at both left and right ends of the back surface of the main plate 144, as will be described later.
Lock pin 15 for removably locking the
0 are fixed via nuts 152, respectively.

As shown in the figure, this lock pin 150 has a head 150a with a necked middle portion, and a head 150a with a necked middle portion.
It is integrally connected to a, and as it goes toward the proximal end,
The skirt portion 150b has a tapered slope so that its diameter gradually increases.

In this way, the chuck member 140 attached via the handle member 148, the chuck master 106, and the lock pin 150 constitute the chuck mechanism 34 that is specially formed in the corresponding mold 16. be.

Next, with reference to FIG. 17, the structure of the locking mechanism 90 for removably locking the vertical slide block 82 and the chuck mechanism 34 will be described in detail.

As shown in the figure, this locking mechanism 90 includes air motors 154 attached to the upper and lower slide blocks 82, respectively, at the portions facing the pair of locking pins 150 of the chuck mechanism 34 described above. This air motor 154 has a pair of input ports 156a and 156 into which compressed air is introduced.
It is equipped with b. This air motor 154 is configured such that when compressed air is introduced into either one of the input ports 156a, 156b, the rotating shaft 158 is rotationally driven with the direction of rotation thereof being determined.

A hollow attachment housing 160 is fixed to the front end surface of the air motor 154, with the front end of a drive shaft 158 protruding inside. The front part of this mounting housing 160, i.e. the locking pin 1
An insertion hole 160b through which the lock pin 150 is inserted is formed in a portion 160a facing the lock pin 50. Here, the thickness of this insertion hole 160b is exactly the same as that of the skirt portion 150 of the lock pin 150.
b is set to substantially match the width provided, and the inner peripheral surface of the insertion hole 150b is formed of a tapered surface so as to complementarily match the tapered surface of the skirt portion 150b.

Here, the skirt portion 150b is inserted into the insertion hole 160b.
When the lock pin 150 is inserted so as to come into contact with the inner peripheral surface of the mounting housing 16, the head 150a of the lock pin 150 is inserted into the mounting housing 16 as shown in the figure.
It is set to be taken into 0. In other words, the front portion 160a of the attachment housing 160
A space sufficient for the head 150a of the lock pin 150 to protrude is defined between the inner surface (rear surface) of the drive gear 162 and the front surface of the drive gear 162.

Further, a drive gear 162 is disposed within the attachment housing 160 so as to be coaxially fixed to the tip of the drive shaft 158. This drive gear 16
A pair of driven gears 164a and 164b are meshed with the drive gear 162 at the top and bottom in the figure, respectively.
The mounting housing 160 is rotatably supported with a drive axis parallel to the drive axis of the mounting housing 160 .

On the other hand, at the tip of each driven gear 164a, 164b, there is a cam roller 1 eccentric from the respective rotation axis.
66a and 166b are connected to rotate together. In addition, the cam roller 166a located above
Attachment housing 160 is located on the lower portion of the outer peripheral surface of the
Head 150a of lock pin 150 inserted into
A first fitting member 168a having a lower surface shape that fits complementary to the upper portion of the first fitting member 168a is in rolling contact with the upper portion of the first fitting member 168a. Furthermore,
A second fitting member is provided on the upper portion of the outer circumferential surface of the cam roller 166b located below, and has an upper surface shape that complementarily fits into the lower portion of the head 150a of the lock pin 150 inserted into the attachment housing 160. 168b is in contact.

These first and second fitting members 168a, 16
8b is a coil spring (not shown),
They are constantly urged to come into pressure contact with the outer peripheral surfaces of the corresponding cam rollers 166a and 166b.

Here, the state of the lock mechanism 90 shown in FIG. 17 indicates an unlocked state. That is, in this unlocked state, as shown in the figure, the part of the outer peripheral surface of each of the pair of cam rollers 166a, 166b that is the shortest distance from the rotational axis of the corresponding driven gear 164a, 164b is connected to the corresponding fitting. It is defined by a state in which the fitting members 168a, 168b are in rolling contact with each other, and as a result, the fitting members 168a, 168b are biased to a position spaced laterally from the head 150a of the lock pin 150 through which the fitting members 168a, 168b are inserted.

On the other hand, although the locked state is not shown, the part of the outer peripheral surface of each of the pair of cam rollers 166a, 166b that is farthest from the rotational axis of the corresponding driven gear 164a, 164b is connected to the corresponding fitting. The members 168a and 168b are brought into contact with each other, and as a result,
This is defined by a state in which the fitting members 168a, 168b are biased to a position where they are laterally fitted into the head 150a of the lock pin 150 through which they are inserted.

The locking operation of the locking mechanism 90 constructed as described above will be explained below. That is, the first
In the unlocked state shown in FIG. 7, the vertical slide block 82 moves laterally, and
The lock pin 150 of the chuck mechanism 34 attached to the attachment station 36b is relatively inserted into the insertion hole 160b of the lock mechanism 90.
Then, the skirt portion 150b of the lock pin 150
When the tapered surface of the insertion hole 160b and the tapered surface forming the inner circumferential surface of the insertion hole 160b come into contact with each other, and further lateral movement of the vertical slide block 82 is prevented, this movement is stopped.

At the same time as this stop, one input port 156a
Compressed air is introduced into the air motor 154 through the air motor 154, and the rotating shaft 158 rotates. This rotating shaft 158
According to the rotation of the driving gear 162, and a pair of driven gears 164a and 16 meshing with this driving gear.
4b rotates, and as a result, both cam rollers 166
a and 166b also rotate.

In this way, each cam roller 166a, 16
On the outer peripheral surface of 6b, fitting members 168a, 16
The portion that contacts 8b transitions from the portion located at the shortest distance to the portion located at the farthest distance. Therefore, the fitting members 168a, 168
b shows the head 150 of the inserted lock pin 150;
The locking pin 150 is shifted from the unlocked position in which it does not fit into the locking mechanism 90 to the locked position in which it engages with the locking pin 150. In other words,
Through this lock mechanism 90, the chuck mechanism 34
are integrally connected to the upper and lower slide blocks 82.

On the other hand, when releasing the locking state of the locking mechanism 90, that is, unlocking it, and removing the chuck mechanism 34 from the vertical slide block 82,
An operation is performed that is the opposite of the lock operation described above. That is, via the other input port 156b,
Compressed air is introduced into the air motor 154, and the rotating shaft 158 rotates in the opposite direction. In response to the rotation of the rotating shaft 158 in the opposite direction, the cam rollers 166a, 1
66b also rotates in the opposite direction.

In this way, each cam roller 166a, 16
On the outer peripheral surface of 6b, fitting members 168a, 16
The portion that contacts 8b transitions from the portion located at the farthest distance to the portion located at the shortest distance. Therefore, the fitting members 168a, 168
b shows the head 150 of the inserted lock pin 150;
The lock pin 150 is shifted from the lock position in which it is fitted into the pin a to the unlock position in which it is separated, and the lock pin 150 is unlocked by the lock mechanism 90. In other words, the chuck mechanism 34 is released from being integrally connected to the vertical slide block 82 via the lock mechanism 90.

The operation of replacing the chuck mechanism 34 in the take-out device 28 constructed as above will be explained.

Specifically, when the molding operation of the work W through the mold 16 installed in one injection molding unit 12 and used for injection molding operation is completed, this mold 16 is replaced as described above. Then, a new mold 16' is installed in the injection molding unit 12. Here, in order to eject the workpiece W from the new mold 16', the chuck mechanism 34 for chucking the workpiece W is also replaced at the same time as the mold 16 is replaced.

Here, a new chuck mechanism 34' corresponding to the newly installed mold 16' is attached to the first exchange station 36a of the exchange mechanism 36. On the other hand, the second replacement station 36b includes a chuck mechanism 3 that is currently in use and will be removed for replacement.
4 should be attached, but nothing is attached. Further, this empty second replacement station 36b is rotated and held in a position opposite to the vertical slide block 82.

When the exchanging operation of the mold 16 is started from this standby state, the exchanging operation of the chuck mechanism 34 is started in response.

Specifically, in the operation of replacing the chuck mechanism 34, first, the vertical slide block 82 is
It is moved to a vertical position facing the exchange mechanism 36, and then, in accordance with the lateral sliding of the left and right slide blocks 76, it starts moving toward the second exchange station 36b.

The four corners 106b of the chuck master 106 of the chuck mechanism 34, which is integrally connected to the vertical slide block 82 via a pair of lock mechanisms 90, are connected to the second replacement station 3.
It is held by four holding mechanisms 110 provided at 6b. After this, both lock mechanisms 90
is transferred from the locked state to the unlocked state, and the lock pin 1 fixed to the chuck master 106 is moved from the locked state to the unlocked state.
50 is released from the locked state by the locking mechanism 90 and brought into a free state.

Thereafter, the left and right slide blocks 76 slide in the opposite direction, and the top and bottom slide blocks 82 are separated from the second exchange station 36b. Here, as described above, the lock mechanism 90 is brought into the unlocked state, and the chuck mechanism 34 is held on the second exchange station 36b via the four holding mechanisms 110, so that the vertical slide block 82 Depending on the distance, the chuck mechanism 34 moves between the upper and lower slide blocks 8.
2 and independently retained at the second exchange station 36b.

Then, in the replacement mechanism 36, the air cylinder 100 is activated to rotate the rotation support member 94 by 180 degrees.
Rotated only once. In response to this rotation, the second replacement station 36b to which the chuck mechanism 34 removed from the vertical slide block 82 is attached is brought to the opposite side, and the chuck mechanism 3 to be newly attached to the vertical slide block 82 is moved to the opposite side.
The first replacement station 36a, to which the replacement mechanism 4' is attached, is brought to a position opposite to the upper and lower slide blocks 82, which are once laterally separated from the replacement mechanism 36.

Thereafter, as the vertical slide block 82 approaches the replacement mechanism 36 again, the lock pins 150 of the new chuck mechanism 34' enter into the pair of lock mechanisms 90 that are set in the unlocked state. When each lock mechanism 90 shifts from the unlocked state to the locked state, these lock pins 150 are locked to the corresponding lock mechanism 90.

Simultaneously with this locking operation, the four retaining mechanisms 110 in the first exchange station 36a
is brought into a state of releasing the holding state of the new chuck mechanism 34'. As a result, the upper and lower slide blocks 82 are replaced by the replacement mechanism 3.
6, the new chuck mechanism 34' is removed from the first replacement station 6' and is integrally connected to the upper and lower slide blocks 82 via the lock mechanism 90. It will be installed. In this way, the operation of replacing the chuck mechanism 34 is completed.

Now, in the second replacement station 36b brought outward, the replaced chuck mechanism 34 is removed from there, and a new one is placed here.
The chuck mechanism 34 to be attached next will be attached. At this point, this second replacement station will now function (change) as the first replacement station, and
The first replacement station 36a passes the new chuck mechanism 34' to the upper and lower slide blocks 82.
will now function (change) as a second exchange station.

It goes without saying that the present invention is not limited to the configuration of the one embodiment described above, and can be modified in various ways without departing from the gist of the invention.

[Effects of the Invention] As detailed above, according to the present invention, when replacing a mold, it is possible to hold the chuck mechanism to be used from now on and to remove the chuck mechanism used previously, if any. This improves the automatic exchangeability of the chuck mechanism by making it possible to use the same (second) station, and minimizes the area occupied by the workpiece unloading machine that moves the chuck mechanism to a predetermined position relative to the opposite part of the mold where the product is unloaded. It is possible to provide a workpiece take-out machine changing device for an injection molding machine that can perform the following steps.

[Brief explanation of the drawing]

1 and 2 are a plan view and a right side view schematically showing, respectively, the structure of an injection molding apparatus equipped with an embodiment of the workpiece take-out machine changing device according to the present invention; FIGS. 3 and 4 The figures are a top view and a front view showing the configuration of the preheating station; Figure 5 is a front view showing the configuration of the automatic guided vehicle; Figures 6, 7, and 8 are the overall configuration of the extraction device. A front view, a top view, and a left side view, respectively; 9th
10 and 11 are a top view, a left side view, and a left side view respectively showing the overall structure of the conveyor.
12 and 13 are front and top views respectively showing the overall configuration of the replacement mechanism; FIG. 14 is a top view showing the configuration of the mounting station; and FIG. 15 is a top view of the chuck mechanism. A front view showing the structure of the chuck master; FIG. 16 is a side sectional view showing the structure of the lock pin fixed to the chuck master; and FIG. 17 is a side sectional view showing the structure of the lock mechanism. In the figure, 10...injection molding device, 12, 14...
Injection molding unit, 16... Mold, 18, 20...
... Preheat station, 22 ... Mold exchange station, 24 ... Mold take-up station, 26
...Automated guided vehicle, 28... Retrieval device, 30...
...Take-out mechanism, 32...Transportation conveyor, 3
4...Chuck mechanism, 36...Replacement mechanism, 3
6a... first mounting station, 36b...
... second mounting station, 38 ... base,
40... Fixed positioning base, 42... Moving positioning base, 44... Hydraulic cylinder mechanism, 46... Connection port, 48... Conveyance path, 50... Conveyance roller, 5
2... Drive motor, 54... Carrying roller, 56,
58... Drive motor, 60... Rail, 70...
Three-dimensional slide drive mechanism, 72...Support body, 7
4... Left and right support arms, 76... Left and right slide blocks, 78... Front and rear support arms, 80... Front and rear slide blocks, 82... Up and down slide blocks, 84... Belt for conveying workpieces, 86... For conveying deposits Belt, 88...Saucer, 90...Lock mechanism, 92...Frame, 94...Rotation support member,
96...Rotation shaft, 98...Pinion gear, 10
0...Air cylinder, 102...Piston rod, 104...Rack, 106...Chuck master, 106a...Through hole, 108a, 108b...
...Mounting arm, 110...Retention mechanism, 112
...Air cylinder, 114...Mounting plate, 116...
...Piston rod, 118a, 118b...Guide rod, 120...Slide guide, 122
a, 122b...long hole, 124a, 124b...
Rollers, 126a, 126b...Locking member, 12
8a, 128b...Locking piece, 130...Cam member, 132...Cam groove, 132a...First cam groove portion, 132b...Second cam groove portion, 134
...Roller, 136a, 136b...Coil spring, 138...Insertion pin, 140...Chuck member, 142a, 142b...Mounting arm, 144...Main plate, 146a, 14
6b...Cross member, 148...Handle member,
150...Lock pin, 150a...Head, 15
0b...Skirt part, 152...Natsuto, 154
... Air motor, 156a, 156b ... Input port, 158 ... Rotating shaft, 160 ... Mounting housing, 160a ... Front part, 160b ... Insertion hole, 162 ... Drive gear, 164a, 164b ...
...Followed gear, 166a, 166b...Cam roller, 168a, 168b...Fitting member.

Claims (1)

[Scope of Claims] 1. A plurality of molds that are replaceably installed in an injection molding machine and each mold a different product;
A workpiece take-out machine changing device for an injection molding machine that automatically replaces a plurality of chuck mechanisms for taking out the product from the mold after molding, the workpiece take-out device for an injection molding machine being driven relative to the injection molding machine in front, back, left, right, up and down directions. a workpiece unloading machine supported by a three-dimensional slide mechanism disposed at the top of the machine and having a locking mechanism for making the chuck mechanism detachable; A chuck replacement mechanism comprising: a first replacement station for temporarily holding the chuck mechanism; and a rotation mechanism rotatably driven to a second replacement station for temporarily holding the next chuck mechanism to be newly installed. A workpiece take-out machine changing device for an injection molding machine, characterized by comprising the following.