JP4857784B2 - Preform removal device - Google Patents

Description

  The present invention relates to a preform take-out apparatus that delivers a preform from a preform compression molding machine to a preform conveying apparatus.

FIG. 10 shows a part of a container preform compression molding machine 71, a conventional preform take-out device 72, and a conveyer 74.
The compression molding machine 71 is rotatably provided so that a plurality of cavity molds 75 move on a circular path, and the preform 80 is formed by the cavity mold 75 and the neck half 77 as shown in FIG. A drop made of molten resin (see drop 8 in FIG. 2A) is put into the hole (cavity) formed, and the drop is compressed by the core 78 to form a preform 80. After the preform 80 is molded, the neck half 77 and the core 78 that support the preform 80 are separated from the cavity mold 75 and transferred to the take-out device 72 as shown in FIG. 11B.

As shown in FIG. 10, the transfer portion of the preform 80 between the compression molding machine 71 and the take-out device 72 is along the circular orbit 76 of the cavity mold 75 (and the neck half 77) of the compression molding machine 71. An upstream portion 81a of the guide rail 81 is disposed. An intermediate portion 81b of the guide rail 81 that is continuous with the upstream portion 81a is formed so as to follow the outer peripheral portion of the rotating turret 73 that takes out the preform 80 to the conveying device 72 side, and continues to the downstream portion 81c. The downstream portion 81c is in the rotational direction of the turret 73 from the trajectory of the rotary turret 73 at a position facing the transfer portion of the preform 80 in the compression molding machine 71 and the take-out device 72 described above in the radial direction of the rotary turret 73. It is formed to extend in the tangential direction. The rotary turret 73 is formed with an extraction hook 82 for taking out the preform 80 from the compression molding machine 71 and transferring the track of the turret 73.
As shown in FIG. 13, the guide rail 81 is connected to the end of the inclined chute 84 with the tip side facing downward, and to the lower end thereof is connected to the transport conveyor 74.

With such a configuration, the preform 80 is transferred on the track of the neck half 77 by inserting the lower part of the preform 80 between the rails at the upstream portion 81 c of the guide rail 81. After that, as shown in FIG. 11D and FIG. 12A, the neck half 77 opens to the outside of the preform 80, the preform 80 is dropped onto the guide rail 81, and the annular flange 83 is mounted on the guide rail 81. Let me put it.
The description will be continued based on FIG. 10, but as shown in FIG. 12A, the take-out hook 82 of the rotary turret 73 comes into contact with the blow-molded portion of the preform 80, and the preform 80 is moved along the rotation track of the guide rail 81. Is transferred. As shown in FIG. 12B, the preform 80 is separated from the circular orbit 76 of the compression molding machine 71, and then, as shown in FIG. The outer periphery is moved half a round. Here, the guide rail 81 extends in the tangential direction of the rotating turret 73, and the preform 80 is disengaged from the take-out hook 82 of the rotating turret 73 as shown in FIG. As shown in FIG. 13, the preform 80 is transferred along the downstream portion 81 c of the guide rail 81 in the tangential direction of the rotary turret 73 and guided to the inclined chute 84.
The preform 80 is lowered by the inclined chute 84 and then conveyed by the conveying conveyor 74 and then transferred to the next process.
JP 2000-512929 A JP 2005-297350 A

PET bottles are produced by stretch-blow molding a preform (pre-molded body) called the above-mentioned preform. The preform is mostly formed by an injection molding machine, but the preform can also be formed by a compression molding machine. The present invention relates to a preform formed by this compression molding machine.
In a conventional method of taking out a preform from a compression molding machine, the preform fitted to the core and the neck half is removed from the cavity and then dropped onto the guide rail while being held by the neck half. In the rotating turret, the annular ring of the preform is transferred while being pushed by the take-out hook while being supported by the stationary guide rail.

In this way, when the preform that has been rotating is dropped onto the fixed guide rail, the acceleration becomes infinite and the posture of the preform is not stable. When the preform that is stationary on the guide rail is pushed by the take-off hook of the rotating turret, the acceleration becomes infinite and the posture is not stable. Further, the posture is not stabilized because the preform ring is slid on the guide rail and pushed by the turret take-out hook. As described above, there is a problem that the preform supported by the guide rail is likely to be scratched if the posture is not stabilized during the transfer of the preform.
The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a preform take-out device that stabilizes the posture during transfer of the preform and is not easily scratched.

The preform take-out device of the present invention is supported by a preform mold in which a preform formed by a compression molding machine as a preformed body of a container moves around a rotation axis provided in the compression molding machine, In a preform take-out device provided with a receiving means for receiving a preform when the preform is taken out from the preform mold, the receiving means is assembled to a rotating body and attached to a rotatable grip unit. A grip for supporting a reform, wherein the grip unit is provided with an advancing / retreating means for making the turning radius of the grip extendable and a swinging means for making the grip rotatable with respect to the rotating body. is, moving means for allowing rotation radius expansion and contraction of the grip, slide to slidably support said grip A block, a rack attached to the slide block, a first pinion pivotally supported at one end of a rotary shaft and meshed with the rack, a second pinion pivotally supported at the other end of the rotary shaft, A second rack that is pivotally supported by the second pinion and meshes with the second pinion and moves in the up and down direction, and engages with the second rack and attaches the slide block to either side of the forward / backward position. A spring spring is provided, and the grip is caused to follow a track of the preform for a certain period by the forward and backward movement and swinging of the grip, and the preform is received from the preform mold to the grip.
Further, in the preform take-out device of the present invention, a preform formed by a compression molding machine as a preform of a container forms an upper neck and a blow molding portion at the lower portion, and the mouth and neck portion. An annular flange portion is formed between the blow molding portion and projecting to the outside of the mouth and neck portion, and the mouth neck portion is supported by a preform mold that moves around a rotation shaft provided in the compression molding machine. In the preform take-out device having a delivery means for delivering the preform from the preform mold to the preform conveying means, the delivery means is assembled to a rotating body and attached to a rotatable grip unit. a grip for supporting the preform, and moving means which allows expansion and contraction of radius of rotation of the grip in the gripping unit, the grip And moving means for enabling rotation is provided for the rotary member, wherein the support portion of the preform mold neck so as to form a split mold, blow molding portion of the preform to the grip The preform is dropped into the hole by opening the split mold, and the blow molded portion of the preform is loosely fitted into the hole, and the annular flange is formed on the upper surface of the grip. The grip is moved forward and backward and swinged so that the grip follows a track of the preform for a certain period, and the preform is received from the preform mold to the grip.
In the preform take-out device, the grip unit is formed with a positioning portion that comes into contact with a predetermined location of the preform mold, and the positioning of the preform and the grip is made by contacting the positioning portion with the predetermined location. can do.
Further, in the preform take-out device of the present invention, a preform formed by a compression molding machine as a preform of a container forms an upper neck and a blow molding portion at the lower portion, and the mouth and neck portion. An annular flange portion is formed between the blow molding portion and projecting to the outside of the mouth and neck portion, and the mouth neck portion is supported by a preform mold that moves around a rotation shaft provided in the compression molding machine. In the preform take-out device having a delivery means for delivering the preform from the preform mold to the preform conveying means, the delivery means is assembled to a rotating body and attached to a rotatable grip unit. A grip for supporting the preform, wherein the grip unit includes an advancing / retracting means for extending and retracting a rotation radius of the grip; and the grip. Oscillating means for enabling rotation with respect to the rotating body, and advancing / retracting means for allowing the rotation radius of the grip to extend and retract, a slide block for slidably supporting the grip, and the slide block A mounted rack, a first pinion pivotally supported at one end of the rotary shaft and meshed with the rack, a second pinion pivotally supported at the other end of the rotary shaft, and a pivot supported by the second pinion A second rack that meshes with the second pinion and moves in the vertical direction; and a spring spring that engages with the second rack and biases the slide block toward either side of the forward / backward position. The grip is moved forward and backward and swinged to follow the track of the preform for a certain period so that the preform is received from the preform mold to the grip. It was.
The preform take-out device can make the grip follow the track of the preform for a certain period by bringing the slide block into contact with the preform mold.
In the preform take-out device, it is preferable that a stepped grip groove for supporting the annular flange is formed on the upper surface side of the grip.

The preform take-out device is a grip for supporting a preform attached to a rotatable grip unit with delivery means assembled to a rotating body, and the grip unit has an advancing / retreating means for extending and retracting the rotation radius of the grip. And a swinging means for allowing the grip to rotate with respect to the rotating body, and the grip is caused to follow a track of the preform by a predetermined section by moving the grip forward and backward. Since the preform is received from the preform mold to the grip, the preform can be smoothly transferred from the preform mold to the grip. It is possible to prevent the preform from being damaged when the preform is delivered.
Further, the preform take-out device forms a support portion of the mouth-and-neck portion of the preform molding die in a split mold, and forms a hole for loosely fitting the blow molding portion of the preform in the grip. The preform is dropped into the hole by opening the mold, the blow molding part of the preform is loosely fitted into the hole, and the annular flange is supported by the upper surface of the grip, so that the grip is surely An annular flange of the preform can be supported.
Furthermore, the preform take-out device forms a positioning part that contacts the predetermined part of the preform molding die in the grip unit, and contacts the positioning part with the predetermined part, whereby the preform and the grip Since the positioning is performed, the preform and the grip are reliably positioned, and the preform is less likely to be damaged.
Further, the advancing / retreating means for extending and retracting the rotation radius of the grip includes a slide block that slidably supports the grip, a rack attached to the slide block, and is supported by one end of a rotation shaft and meshes with the rack. A first pinion that rotates, a second pinion that is pivotally supported by the other end of the rotary shaft, and a second rack that is pivotally supported by the second pinion and meshes with the second pinion and moves in the vertical direction. And a spring spring that engages with the second rack and urges the slide block to either side of the forward / backward position, so that the urging means for returning the slide block to the initial position is converted in the vertical direction. As a result, the length (radius) from the grip to the rotation center axis can be shortened. Moreover, the urging force can be increased.
By bringing the slide block into contact with the preform mold and causing the grip to follow the preform track for a certain period, the grip can be surely followed by the preform.

Hereinafter, a preform take-out device according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a part of a preform compression molding machine 2, a preform take-out device 1 and a conveyor 3 according to the present invention.
The compression molding machine 2 is rotatably provided so that a plurality of cavity molds 5 continuously move on a circular orbit, and an upper mold is formed above the cavity mold 5 as shown in each drawing of FIG. The neck half 6 is provided to be movable up and down. The neck half 6 is formed by a pair of left and right molds in the horizontal direction and is configured to be openable and closable. A molten resin drop 8 is supplied to the inner hole 7 formed by the cavity mold 5 and the neck half 6. When the core 9 that can move up and down is pushed into the inner hole 7, the drop 8 can be compression-molded.

FIG. 3 shows a preform 12 compression-molded by the compression molding machine 2. The preform 12 is provided with a mouth and neck portion 13 having a bottom portion and formed in a substantially cylindrical shape and having an opening at an upper portion, a blow molding portion 14 at a lower portion, and a lower portion of the mouth neck portion 13 above the blow molding portion 14. In addition, an annular flange 15 protruding outside the mouth and neck portion 13 is formed.
The preform take-out device 1 is provided with a plurality of (six) rotating arms 10 that are rotatable about a driving motor (not shown) with a rotating shaft as an axis, with an equiangular interval. A grip unit 11 is attached to the tip.

4 is a schematic plan view of the grip unit 11, FIG. 5 is a schematic side view of one side thereof, and FIG. 6 is a schematic side view of the other side.
The grip unit 11 is provided with a swing shaft 18 provided on the base end (arm) side with its axis line directed in the vertical direction, and the grip unit 11 swings with respect to the rotary arm 10 as shown in FIG. Installed as possible. The swing shaft 18 is provided with a swing arm 17, and a slide block 19 extending in the swing rotation radius direction of the grip 35 shown in FIG. It is slidably installed so that it can move forward and backward.

Hereinafter, the slide mechanism of the slide block 19 will be described.
The swing arm 17 is provided with a rotating shaft 20 that penetrates the swing arm 17 in the horizontal direction, and a pinion gear 21 is attached to the rotary shaft 20 on one end side of the swing arm 17 as shown in FIG. It has been. A rack 22 meshing with the pinion gear 21 is disposed on the side surface of the swing arm 17 so as to move in the vertical direction. The rack 22 is supported by a support hole 23 formed in the swing arm 17 so as to move up and down, and a spring seat 28 that protrudes outward in a flange shape is attached to a slightly upper side of the intermediate position of the rack 22. Yes. A spring spring 24 is disposed in a compressed state between the spring seat 28 and the upper end portion of the support hole 23.

As shown in FIG. 6, a fan-like pinion gear 25 is attached to the other side of the swing shaft 17 on the other side of the swing arm 17, and a rack 26 fixed to the slide block 19 meshes with the pinion gear 25. The rack 26 is arranged so as to move in the horizontal direction and in the swinging and turning radial direction of the grip 35.
As shown in FIG. 5, a positioning recess 47 is formed at the tip of the slide block 19 of the grip unit 11, and the curved surface 48 is made to correspond to the radius of curvature of the outer peripheral surface 49 of the cavity mold 5. Accordingly, the preform 12 and the grip 35 are formed so that the center of the preform 12 and the preform placement center position P of the grip 35 coincide with each other. Then, the slide block 19 is pressed against the outer peripheral surface 49 of the cavity mold 5, thereby resisting the spring force of the spring spring 24, and on the swing arm 17 in the swing rotation radius direction of the grip 35 (see FIG. 1 (returned to the center C side) (the state shown in FIG. 5). Further, when the engagement between the positioning concave portion 47 of the slide block 19 and the curved surface 48 of the cavity mold 5 is released (in the state of arrow A in FIG. 5), the forward movement shown in FIG. It is configured to return to the position. A stopper 27 is formed on the rear end side of the slide block 19 to restrict the advance of the slide block 19 beyond a certain level.
As described above, the positioning recess 47 at the tip of the slide block 19 is pressed against the cavity mold 5 by the urging force of the spring, so that the preform 12 due to slides existing in the entire apparatus, backlash between gears, backlash, etc. There is no risk of displacement of the grip 35.
The slide block 19 may be advanced by the urging force of the spring spring 24 by retreating the slide block 19 toward the center C side by a pressing means such as a cam or an air cylinder, and releasing the pressing means.
Further, the slide block 19 is moved back and forth without engaging the cavity mold 5 with a cam, cylinder pneumatic pressure means or hydraulic means, a combination of them with a spring, and a drive motor (not shown) for the rotary shaft 20. And rotating the rotary shaft 20 to move the rotary arm 10 forward and backward in the radial direction. Further, an air cylinder type, servo motor type, or linear motor type linear guide directly incorporating power as the slide block 19 may be used.

A slide plate 29 that can move forward and backward in the radial direction of the rotary arm 10 on a guide plate 31 provided on the upper surface of the slide block 19 is attached to the upper portion of the slide block 19. A rod 32 that passes through the protrusion 30 between the end face on the proximal end side of the guide plate 31 and the protrusion 30 formed on the upper surface of the slide block 19 and has an axis extending in the oscillating rotation radius direction of the grip 35. A spring spring 33 is disposed around the rod 32 so as to urge the slide plate 29 toward the distal end side.
A grip support member 34 and a pair of grips 35 are attached to the upper portion of the slide plate 29. The grip 35 is formed by a mechanism that opens the grip 35 when the grip support member 34 moves backward and closes the grip 35 when moved forward. When the pair of grips 35 are closed, the outer diameter of the hole 36 a having a diameter slightly larger than the outer diameter of the blow molded portion 14 of the preform 12 and smaller than the outer diameter of the annular flange 15 and the outer diameter of the annular flange 15. A slightly larger stepped grip groove 36 b is formed, and the annular flange 15 of the preform 12 is supported substantially concentrically on the edge of the grip groove 36. A first cam follower 37 having a circular cross section protruding upward is attached to the upper surface of the grip support member 34.

  As shown in FIG. 4, a second cam follower 38 having a circular cross section offset in the circumferential direction with respect to the rotating arm 10 extending in the radial direction is attached to the swing arm 17. As shown in FIG. 1, a cam groove 39 is fixed to the preform take-out device 1, and the outer peripheral portion of the second cam follower 38 rotates along the shape of the cam groove 39. On the compression molding machine 2 side, the cam groove 39 is a deformed arc trajectory depicting a trajectory for swinging the grip 35 so that the center of the mold 5 is placed on the advance / retreat trajectory of the grip 35 by the slide block 19. Yes, a substantially circular path (perfect circle) is formed on the side of the conveyor 3. On the other hand, the swing shaft 18 connected to the rotary arm 10 rotates while drawing a circular orbit with the same radius length. Therefore, both the swing shaft 18 of the swing arm 17 and the second cam follower 38 rotate and move on a circular path having the same radius on the conveyor 3 side, and the second cam follower on the compression molding machine 2 side. 38 moves along the cam groove 39 by a deformed circular orbit. Therefore, the grip unit 11 can be swung in the circumferential direction with the rocking shaft 18 of the rocking arm 17 as the rocking point due to the track difference between the rocking shaft 18 and the second cam follower 38.

  A of FIG. 7 shows the conveyance conveyor 3 arrange | positioned in the position facing the compression molding machine 2 on both sides of the preform taking-out apparatus 1. The conveyor 3 includes a bendable inner chain conveyor 40 and an outer chain conveyor 41. The upstream side of the inner chain conveyor 40 is curved so as to be located inside the preform 12 with the grip 35 of the preform take-out device 1 supporting the preform 12, and can be placed at any location (see FIGS. 1 and 7). In A, it is formed so as to extend linearly in a tangential direction with respect to the rotation direction of the grip 35 at a point a) 180 degrees downstream in the circumferential direction from the receiving point b. The outer chain conveyor 41 extends so as to be parallel to the straight portion of the inner chain conveyor 40.

  The preform take-out device 1 located further inside and above the inner chain conveyor 40 of the conveyor 3 is provided with a substantially arc-shaped arc cam 42a. The arc-shaped cam 42a is disposed along the circular orbit of the first cam follower 37 formed on the grip 35. The inner surface shape of the arc-shaped cam 42a with which the outer peripheral surface of the first cam follower 37 abuts is The first cam follower 37 forms an inclined surface 43 that moves inward in the radial direction of the circular orbit at a position immediately before the delivery point a. In addition, the first cam follower 37 forms an inclined surface 44a that moves outward in the radial direction of the circular orbit at a position downstream of the transfer point a, and an arc surface is formed between the inclined surfaces 43a and 44. 45 is formed. As shown in FIGS. 7A and 9D, if a neck ring peripheral surface guide 55 for guiding the peripheral surface of the annular flange (neck ring) 15 is provided above the chain conveyors 40 and 41, the preform 12 is provided. This is preferable because there is no fear that the blow molded portion 14 will be rubbed into the chain.

As shown in FIGS. 4 to 6, since the slide plate 29 is biased radially outward by the spring spring 33, the grip support member 34 is brought into contact with the inclined surface 43 by the first cam follower 37. The grip support member 34 moves backward in the radial direction against the urging force of the spring spring 33, and the grip 35 is opened. The grip support member 34 maintains the state in which the grip 35 is opened by the arc surface 45 of the arc-shaped cam 42, and the grip support member 34 is urged radially outward by the spring spring 33 on the downstream inclined surface 44. Thus, the grip 35 is configured to be closed.
7B shows a modified arc cam 42b for releasing the grip 35 on the receiving point b side in FIG. The deformed arc-shaped cam 42b has a shape for releasing the grip 35 while swinging. The cam 42b enters the preform 12 with the grip 35 opened, and after the preform placement center position P of the grip 35 and the center of the preform 12 coincide with each other, the release of the grip 35 by the deformed arc cam 42b is released. The grip 35 is closed.

Next, the operation of the preform takeout device according to the embodiment of the present invention will be described.
As shown in FIG. 2A, when the drop supply member 46 of the transport device enters between the cavity mold 5 and the neck half 6 and moves on the same trajectory point that is tangent to the trajectory of FIG. As shown in B, the drop 8 is supplied from the drop supply member 46 to the inner hole 7 of the cavity mold 5, and then the drop supply member 46 is separated from the track of the cavity mold 5. Next, the neck half 6 is lowered and disposed on the cavity mold 5, and then the core 9 is lowered as shown in FIG. 2C and inserted into the through hole 51 and the inner hole 7 of the neck half 6. It is. Thus, a gap (cavity) having the same shape as the preform 12 is formed, and the drop 8 fills the gap on the neck half 6 side. As shown in FIG. 2D, the step 8 of the core 9 and the stepped portion 53 of the neck half 6 come into contact with each other, whereby the drop 8 is compressed into the core 9 to form the preform 12.

When the preform 12 is formed, the preform 12 is cooled and approaches the circular orbit of the grip 35 of the preform take-out device 1 by the movement of the cavity mold 5 as shown in FIG. And it arrives at the area | region of the area L shown in FIG. As shown in B of FIG. 8, when the preform 12 approaches the region L, the neck half 6 and the core 9 rise while supporting the preform 12, and the preform 12 is extracted from the cavity mold 5.
On the other hand, the grip 35 of the preform take-out device 1 also moves in a circular orbit around the rotation axis C, and at a place exceeding 60 degrees in the circumferential direction from the transfer position a of the preform 12 from the conveyor 3. The second cam follower 38 of the grip unit 11 is restricted by the cam groove 39, and swinging of the grip unit 11 toward the rotation circumferential direction side starts.

In this embodiment, as shown in FIG. 1, control is performed so that the rotation pitch of one grip 35 corresponds to the rotation pitch of one preform 12. When the grip 35 reaches the region L, the track is controlled so that the grip 35 follows the circular track of the cavity mold 5, the neck half 6, and the preform 12. The trajectory is controlled by moving the slide block 19 forward and backward while swinging the grip unit 11.
That is, in the region L, if there is no adjustment to the circular orbit of the grip 35, the rotation track of the grip 35 protrudes toward the preform take-out device 1 as it approaches the center region of the interval L. It is necessary to retract the device 1 radially inward.
Therefore, the grip 35 is swung by the cam groove 39 so that the curved surface 48 of the concave portion 47 can contact the outer peripheral surface 49 of the mold 5, and after the contact, the rotary shaft 20, the pinion gear 25, and the rack 26 cooperate. The slide plate 29 in the forward movement position shown in FIG. 6 moves to the backward movement position shown in FIG. 5 while the concave portion 47 is in contact with the mold 5 by the bias of the spring 24.

As shown in FIG. 5, the curved surface 48 of the positioning recess 47 of the grip unit 11 abuts on the outer peripheral surface 49 of the cavity mold 5, thereby matching the center position P of the preform 12 with the center position of the grip 35. . In this way, in the area of the section L, the positions of the grip 35, the cavity mold 5 and the neck half 6 and the transfer (circumferential) speed can be matched. Next, the grip 35 is opened by the deformed arc-shaped cam 42b, the grip hole 36a enters the blow molding portion 14 of the preform 12, the deformed arc-shaped cam 42b is released, and the grip 35 is closed, as shown in FIG. 8C. Thus, it arrange | positions in the position close | similar to the lower surface of the neck half 6. FIG.
In this way, the core 9 is moved upward in a state where the peripheral speeds of the grip 35 and the preform 12 are matched, and the core 9 and the preform 12 are separated.
Next, the neck half 6 is opened in the horizontal direction, and the preform 12 is dropped by gravity (D in FIG. 8). As shown in FIG. 8A, since the preform 12 is inserted into the core 9, even if the preform 12 adheres to any of the neck halves 6, the preform 12 is regulated by the core 9 and is inevitably necessary. Can fall into. When the preform 12 falls, as shown in FIG. 8D, the preform 12 is guided to the core 9 and falls almost directly below, and the annular flange 15 of the preform 12 is placed on the grip groove 36b of the grip 35. Placed.

  Next, after the height of the grip 35 is positioned at the same height, the neck half 6 and the core 9 are raised and completely separated from the preform 12 as shown in FIG. 9A. When the grip unit 11 passes the receiving point b, the swinging direction swings from the rotational circumferential direction of the grip unit 11 to the opposite side of the rotational circumferential direction. When the preform 12 passes through the region L while being supported by the grip 35, the grip 35 and the preform 12 are connected to the orbit between the cavity mold 5 and the neck half 6 as shown in FIG. 9B. To be released. In this state, the swing of the grip unit 11 ends at a position rotated approximately 60 degrees in the circumferential direction from the delivery position b (see FIG. 1), and then the grip 35 draws a circular orbit about a half turn. Rotate.

  As shown in FIG. 1 and FIG. 9C, when the grip 35 is transferred to the conveyor 3, the preform 12 is transferred along the inner chain conveyor 40 formed so as to substantially follow the circular path of the grip 35. Is done. When the grip 35 approaches the delivery point a of the transport conveyor 3, the grip 35 is transferred between the inner chain conveyor 40 and the outer chain conveyor 41 with the blow molding unit 14 inserted as shown in FIG. The height position of the grip 35 is set as close as possible to the surface of the chain conveyors 40 and 41.

As shown in FIG. 7, when the grip 35 arrives just before the transfer point a, the first cam follower 37 of the grip unit 11 comes into contact with the inclined surface 43 formed on the inner side surface of the arc-shaped cam 42 and moves radially inward. The first cam follower 37 is moved backward by being moved. Thus, when the grip 35 is transferred directly above the transfer point a, the grip 35 is released, and the annular flange 15 of the preform 12 is placed on the chain conveyors 40 and 41 as shown in FIG. 9D. Let me put it. The preform 12 that has been rotated and moved has the acceleration (tangential) direction coincident with the extending direction of the chain conveyors 40 and 41 at the transfer point a, so that the grip 35 can be smoothly conveyed by the conveyor 3.
After the grip 35 passes through the inclined surface 43 of the arc-shaped cam 42, the first cam follower 37 reaches the maximum retracted position on the circular arc surface 45 and opens the grip 35 to the maximum, thereby preventing interference with the preform 12. When the first cam follower 37 passes through the inclined surface 44 on the downstream side, the first cam follower 37 moves forward and the grip 35 is closed.
While repeating these operations, the preform 12 formed by the compression molding machine 2 is transferred to the conveyor 3 via the preform take-out device 1.

While the embodiments of the present invention have been described above, the present invention can of course be modified or changed in various ways based on the technical idea of the present invention.
For example, the grip unit 11 is mechanically swung by the second cam follower 38 and the cam groove 39. With respect to this swinging means, the circumferential angle of the rotating arm 10 is confirmed by a sensor or the like, and the swing unit is electrically swung. It may be moved.
Further, even if the swing shaft 18 of the grip unit 11 is attached to the rotating plate (hub) 10a shown in FIG. 14 instead of the rotating arm 10, the same effects as in the above embodiment are obtained.

1 is a schematic plan view of a preform take-out device according to an embodiment of the present invention, a compression molding machine and a conveyer provided therewith. FIGS. 2A and 2B are diagrams illustrating a preform compression process of the compression molding machine of FIG. 1, in which A is a cross-sectional view of a state immediately before a drop is supplied from a drop supply member to a cavity mold, and B is a drop supplied to a cavity mold. C is a sectional view in which the neck half is connected to the cavity mold and the core is inserted into the through hole and the inner hole, and D is a sectional view in a state in which the drop is compressed. It is. It is a longitudinal cross-sectional view of the preform shape | molded with the compression molding machine of FIG. It is a top view of the grip unit of the preform taking-out apparatus shown in FIG. It is the side view seen from the one side of the grip unit (the slide block is in the retracted position) of the preform take-out device shown in FIG. It is the side view seen from the other side of the grip unit (the slide block is in the forward position) of the preform take-out device shown in FIG. A is an enlarged plan view of a preform delivery point a of the preform take-out apparatus shown in FIG. 1, and B is an enlarged sectional view of a preform receiving point b shown in FIG. It is sectional drawing which shows the delivery process of the preform in the delivery point of FIG. 1, A is sectional drawing of the preform formed in the metal mold | die, B is sectional drawing of the state which took out the preform from the metal mold | die, C is Sectional drawing of the state in which the grip is arranged below the neck half, and D is a sectional view of the state in which the preform is dropped on the grip. FIG. 8 shows the delivery process following FIG. 8, where A is a cross-sectional view of the preform being removed from the core, B is a cross-sectional view of the preform being separated from the track of the compression molding machine, and C is a preform on the conveyor. FIG. 4D is a cross-sectional view in a state where the preform is separated from the grip and disposed on the guide rail. It is a schematic plan view of the preform taking-out apparatus by a prior art example, the compression molding machine and conveyance conveyor attached to this. A conventional preform delivery state is shown. A is a cross-sectional view of a preform formed in a mold, B is a cross-sectional view of a preform taken out from the mold, and C is a preform placed on a guide rail. And D is a cross-sectional view of a state in which the preform is disposed on the guide rail. 11 shows the preform delivery state following FIG. 11, where A is a sectional view of the preform being transferred by the turret, B is a sectional view of the cavity mold away from the conveyor, and C is the preform. A sectional view in a state where the guide rail is brought into contact with the take-out hook and guided and conveyed, and D is a sectional view in a state where the preform is conveyed on the conveying conveyor. It is an expanded sectional view of the connection part of the preform taking-out apparatus and conveyance conveyor of FIG. It is a modification of the preform taking-out apparatus by embodiment of this invention, Comprising: It is a schematic plan view (figure corresponding to FIG. 1) of the compression molding machine and conveyance conveyor which were attached to this preform taking-out apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Preform extraction apparatus 2 Compression molding machine 3 Conveyor 5 Cavity type 6 Neck half 10 Arm 11 Grip unit 12 Preform 13 Mouth neck part 14 Blow molding part 15 Annular flange 17 Oscillating arm 19 Slide block 29 Slide plate 35 Grip 36a Grip hole 36b Grip groove 37, 38 Cam follower 39 Cam groove 42a Arc cam 42b Deformation arc cam

Claims (6)

A preform formed by a compression molding machine as a preform of the container is supported by a preform mold that moves around a rotation axis provided in the compression molding machine,
In the preform take-out device provided with a receiving means for receiving the preform when the preform is taken out from the preform mold,
A grip for supporting the preform attached to a rotatable grip unit, the receiving means being assembled to a rotating body,
The grip unit is provided with an advancing / retracting means for allowing the rotation radius of the grip to expand and contract, and a swinging means for enabling the grip to rotate with respect to the rotating body,
The advancing / retracting means for enabling the grip radius to extend and retract includes a slide block that slidably supports the grip, a rack attached to the slide block, and a first shaft that is pivotally supported at one end of a rotating shaft and meshes with the rack. A second pinion supported on the other end of the rotating shaft, a second rack supported on the second pinion, meshed with the second pinion, and moved in the vertical direction; A spring spring that engages with the second rack and urges the slide block to either side of the forward / backward position;
A preform take-out apparatus which receives the preform from the preform molding die to the grip by causing the grip to follow a predetermined track by advancing / retreating and swinging the grip. . A preform formed by a compression molding machine as a pre-formed body of a container forms a mouth-and-neck portion at the upper portion and a blow-molded portion at the lower portion, and the mouth-and-neck portion between the mouth-and-neck portion and the blow-molded portion. An annular flange portion protruding outward is formed, and the mouth and neck portion is supported by a preform mold that moves around a rotation axis provided in the compression molding machine,
In the preform take-out device having a delivery means for delivering the preform from the preform mold to the preform conveying means,
A grip for supporting the preform attached to a rotatable grip unit in which the delivery means is assembled to a rotating body,
The grip unit is provided with an advancing / retreating means for allowing the rotation radius of the grip to expand and contract, and a swinging means for enabling the grip to rotate with respect to the rotating body,
While forming the support portion of the neck portion of the preform molding die in a split mold, forming a hole for loosely fitting the blow molding portion of the preform in the grip,
The preform is dropped into the hole by opening the split mold, the blow molding portion of the preform is loosely fitted into the hole, and the annular flange is supported by the upper surface of the grip,
A preform take-out apparatus which receives the preform from the preform molding die to the grip by causing the grip to follow a predetermined track by advancing / retreating and swinging the grip. . The grip unit is formed with a positioning portion that contacts a predetermined portion of the preform mold, and the positioning of the preform and the grip is performed by contacting the positioning portion with the predetermined portion. The preform take-out device according to claim 1 . A preform formed by a compression molding machine as a pre-formed body of a container forms a mouth-and-neck portion at the upper portion and a blow-molded portion at the lower portion, and the mouth-and-neck portion between the mouth-and-neck portion and the blow-molded portion. An annular flange portion protruding outward is formed, and the mouth and neck portion is supported by a preform mold that moves around a rotation axis provided in the compression molding machine,
In the preform take-out device having a delivery means for delivering the preform from the preform mold to the preform conveying means,
A grip for supporting the preform attached to a rotatable grip unit in which the delivery means is assembled to a rotating body,
The grip unit is provided with an advancing / retracting means for allowing the rotation radius of the grip to expand and contract, and a swinging means for enabling the grip to rotate with respect to the rotating body,
The advancing / retracting means for enabling the grip radius to extend and retract includes a slide block that slidably supports the grip, a rack attached to the slide block, and a first shaft that is pivotally supported at one end of a rotating shaft and meshes with the rack. A second pinion supported on the other end of the rotating shaft, a second rack supported on the second pinion, meshed with the second pinion, and moved in the vertical direction; A spring spring that engages with the second rack and urges the slide block to either side of the forward / backward position ;
A preform take-out apparatus which receives the preform from the preform molding die to the grip by causing the grip to follow a predetermined track by advancing / retreating and swinging the grip. . The preform take-out apparatus according to claim 1 or 4 , wherein the slide block is brought into contact with the preform mold so that the grip follows a track of the preform for a certain section.   The preform takeout device according to any one of claims 1 to 4, wherein a stepped grip groove for supporting the annular flange is formed on an upper surface side of the grip.

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