JP6632859B2 - Vacuum nozzle for preform suction and preform receiving device provided with the same - Google Patents

Description

  The present invention relates to a vacuum nozzle for suctioning a preform used in a device for receiving a preform taken out of an injection molding machine by an unloader or the like, and a preform receiving device provided with the same.

  A preform, which is a material for blow molding of a synthetic resin bottle such as a so-called PET bottle, is molded by an injection molding machine, taken out of a mold by a preform take-out machine, transferred to a preform transport device, and downstream. (See, for example, Patent Document 1).

  The preform receiving device includes a vacuum nozzle that sucks the preform taken out of the mold by a take-out machine or the like by vacuum suction. A plurality of vacuum nozzles are mounted side by side on a receiving table that is accessible to the receiving device, and the preform is sucked to the vacuum nozzle by fitting the tip of the vacuum nozzle to the opening of the preform and performing vacuum suction. Then, after moving the receiving table to the preform transfer device, the preform is transferred to the preform transfer device by lowering the vacuum nozzle to release the vacuum suction.

  The vacuum nozzle includes a cylinder connected to a suction pump and a nozzle having a flange formed at a base end of the cylinder. Then, at the time of vacuum suction, the preform is depressurized by causing the cylindrical portion to enter the opening of the preform and causing the flange to contact the opening edge of the preform, and the preform is adsorbed to the vacuum nozzle. You.

JP 2013-151125 A

  Since the vacuum nozzle is fixed to the receiving table, when there is a gap between the flange and the opening edge of the preform when the receiving table is brought close to the unloader or the like and the preform is sucked, from the gap, Since the outside air invades and the inside of the preform is not decompressed, the preform may not be sucked well.

  In particular, a plurality of vacuum nozzles are arranged on the receiving table, and it is necessary to suck a plurality of preforms at a time. However, since the penetration length of the vacuum nozzle cannot be adjusted for each preform, if the penetration length of the vacuum nozzle is short, a gap is formed between the opening edge of the preform and the flange, so that suction is performed well. It may not be able to attach, or it may fall on the way. On the other hand, if the penetration length of the vacuum nozzle is long, the flange and the opening edge of the preform may collide, and the preform and the machine may be damaged.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a vacuum nozzle for suctioning a preform and a preform receiving device provided with the same, which can surely take out the preform from an unloader or the like.

  In order to solve the above problems, a vacuum nozzle for preform suction of the present invention is a vacuum nozzle for preform suction, and is slidably fitted to a pipe connected to a suction pump and the pipe. That is, a nozzle is provided at the base end with a flange protruding therefrom and a tip end having a tubular portion insertable into the preform.

  There is provided an urging means for urging the nozzle in a direction in which a tip of the nozzle protrudes from the pipe.

A stopper is formed at the tip of the tube,
The nozzle portion has a stopper contact portion engageable with the stopper.

Further, the preform receiving device of the present invention
A receiving table in which a plurality of vacuum nozzles for suctioning the preform are arranged,
A suction pump connected by a pipe to each pipe of the plurality of vacuum nozzles,
Equipped.

The vacuum nozzle for preform suction of the present invention may be brought close to the preform and the nozzle portion may be pushed into the opening of the preform. Since the nozzle portion has play so as to be slidable with respect to the tube portion, the nozzle portion is slid by bringing the receiving table close to the preform where the opening edge is assumed to be the lowest position. The flange abuts the opening edge of the preform within the movement range. After the flange hits the opening edge of the preform, even if the nozzle portion is further pushed in, the nozzle portion is slidably provided with respect to the tube portion. Being retreated.

  By performing suction in this state, since no gap is formed between the flange and the preform, the preform can be sucked without air leakage.

  In particular, when a plurality of preforms are arranged on the receiving table of the preform receiving apparatus, suction can be performed without the need to individually adjust the height of the nozzle portion, and the transfer capacity can be increased as much as possible. Defects can be suppressed, and machine stoppage due to defective conveyance of the injection molding machine can be reduced.

FIG. 1 is a side view of a preform conveying device equipped with a vacuum nozzle according to the present invention. FIG. 2 is a side view of the vacuum nozzle. FIG. 3 is a vertical sectional view of the vacuum nozzle. FIG. 4 is a bottom view of the vacuum nozzle. FIG. 5 is a plan view of the vacuum nozzle. FIG. 6 is an explanatory diagram showing a process of inserting a preform into a vacuum nozzle. FIG. 7 is an explanatory diagram showing a process following FIG.

  The vacuum nozzle 30 for conveying a preform of the present invention will be described with reference to the drawings.

  FIG. 1 is a side view showing an embodiment of a preform conveying device 10. The transfer device 10 is configured to perform injection molding by an injection molding machine (not shown), and transfer the preform 90 taken out by an unloader (disposed on the left side of the preform receiving device 20 in FIG. 1) to a preform receiving device. This is a device that is received by the transfer device 20, transferred to the transfer device 12, and sent to the slat conveyor 14 on the downstream side. The transfer device 12 narrows the interval between the preforms 90 arranged in a line to one side while keeping the mold arrangement, and sends the preforms 90 to the slat conveyor 14. Note that, of course, the configuration, structure, and the like of the transport device 10 are not limited to the illustrated embodiment.

  As shown in the figure, the receiving device 20 is provided with a main body 22 that moves on a horizontally installed rail 21 and a horizontal shaft 23 at the end of the main body 22 as shown in FIG. And a receiving table 25 attached to the tip of the arm 24. The receiving table 25 is provided with a plurality of vacuum nozzles 30, 30 for vacuum suctioning the preform 90 from the unloader. Each vacuum nozzle 30, 30 is connected to a suction pump (not shown). The operation of the receiving device 20 will be described later.

  As shown in FIGS. 2 and 3, the vacuum nozzle 30 includes a nozzle portion 40 that fits into the preform and a tube portion 50 that communicates with the suction pump. The nozzle portion 40 is slidable with respect to the tube portion 50. In this embodiment, the nozzle unit 40 is urged by the urging means 70 toward the distal end of the tube 50.

  More specifically, the nozzle portion 40 has a flange 41 projecting from the base end, and the tip end has a tapered cylindrical portion so as to be easily inserted into the preform 90 (see FIGS. 6 and 7). 42. The nozzle part 40 has a through-hole 43 through which the tube part 50 is inserted inside the cylindrical part 42. The through-hole 43 is formed with an insertion portion 44 slidably in contact with the tube portion 50, and a stepped stopper contact portion 45 having an enlarged diameter on the distal end side of the insertion portion 44. , A retaining part 51 of the tube part 50 to be described later is engaged. Further, the base end of the insertion portion 44 is also enlarged in diameter, forming a nozzle portion side receiving portion 46 to which the urging means 70 can be attached.

  The tube part 50 is a tubular body whose tip is inserted into the through hole 43 of the nozzle part 40. At the tip of the tube part 50, a stopper 51 projecting toward the outer periphery is formed. In addition, a screw 52 is engraved on the base end of the tube portion 50. The groove of the screw 52 is formed more than the mounting hole 61 of the mounting portion 60 described below.

  The vacuum nozzle 30 is mounted on the receiving table 25 by the mounting section 60. The mounting portion 60 is provided with a mounting hole 61 in which a screw is engraved, and an annular projecting portion 62 is formed on the base end side so as to surround the mounting hole 61.

  The screw 52 of the tube 50 is screwed into the mounting hole 61, and the tip of the screw 52 penetrates through the mounting hole 61 and protrudes into the protruding portion 62 on the base end side of the mounting portion 60. Then, by screwing the nut 66 to the screw 52 of the protruding tube portion 50, the tube portion 50 can be fixed to the mounting portion 60.

  The mounting hole 61 has an enlarged diameter at the tip end side, and serves as a mounting portion side receiving portion 64 to which the urging means 70 can be mounted. A screw 63 is engraved on the outer periphery of the overhang portion 62. The screw 63 of the overhang portion 62 is for attachment to the receiving table 25.

  In the present embodiment, the urging means 70 is fitted to the pipe portion 50 between the nozzle portion-side receiving portion 46 and the mounting portion-side receiving portion 64. The urging means 70 urges the nozzle portion 40 so as to protrude toward the distal end of the tube portion 50. For example, the urging means 70 is a coil spring shown in FIG. 2 and the like, which is fitted on the outer periphery of the tube portion 50, and whose end comes in contact with the nozzle portion-side receiving portion 46 and the mounting portion-side receiving portion 64 of the coil spring. can do.

  The assembly of the vacuum nozzle 30 will be described for each member having the above configuration. First, the nozzle part 40 is fitted into the tube part 50. The nozzle part 40 is attached to the tube part 50 by inserting the tube part 50 into the through hole 43 from the base end side. The attached nozzle portion 40 does not come off the tip of the tube portion 50 because the retaining stopper contact portion 45 contacts the retaining stopper 51. Subsequently, the urging means 70 is fitted into the tube 50. Then, the screws 52 are screwed into the mounting holes 61 of the mounting portion 60 for the mounted pipe portions 50.

  Next, after the tip of the screw 52 of the tube portion 50 protrudes from the overhang portion 62, the tube portion 50 is attached to the attachment portion 60 by fitting a nut 66 to the screw 52 protruding from the overhang portion 62. Thereby, as shown in FIGS. 2 to 5, the vacuum nozzle 30 can be assembled.

  The assembled vacuum nozzle 30 has a configuration in which the nozzle portion 40 is slidably fitted to the tube portion 50 and is urged toward the distal end side of the tube portion 50 by the urging means 70. The vacuum nozzles 30 are attached to the receiving table 25 by being screwed into screw holes formed in a row on the receiving table 25, respectively. As a result, in a no-load state, the nozzle portion 40 protrudes toward the distal end of the tube portion 50 so that the stopper contact portion 45 contacts the stopper 51 of the tube portion 50. On the other hand, when the nozzle portion 40 is pressed against the proximal end of the tube portion 50 against the urging force of the urging device 70, the urging device 70 is contracted, and the nozzle portion 40 is retracted toward the proximal end side of the tube portion 50. Play L (see FIG. 3). In the present embodiment, the retreat limit (play L) of the nozzle portion 40 is a distance until the base end of the nozzle portion 40 comes into contact with the mounting portion 60 as shown in FIG.

  The vacuum nozzle 30 having the above configuration is attached to the receiving table 25 shown in FIG. 1 by screwing a screw 63 of the overhang portion 62, and each of the vacuum nozzles 30 is connected by a pipe 50 to a suction pump by piping. Is done.

  Then, the receiving device 20 is caused to approach the preform that has been injection-molded by the injection molding machine and removed by the unloader. Specifically, as shown in FIG. 1, the arm 24 is rotated with respect to the horizontal axis 23, the receiving table 25 is raised so that the vacuum nozzle 30 is horizontal, and the main body 22 is moved on the rail 21. 6A, the nozzle unit 40 of the vacuum nozzle 30 is moved closer to the hole of the preform 90 as shown in FIG. 6A.

  Subsequently, the vacuum pump 30 is moved close to the preform 90 as shown in FIG. Insert

  Further, by bringing the vacuum nozzle 30 closer to the preform 90, the flange 41 of the nozzle portion 40 comes into contact with the opening edge 91 of the preform 90 as shown in FIG. Then, from this state, the vacuum nozzle 30 is pushed in as shown in FIGS. 7B and 7C, whereby the flange 41 is pushed by the opening edge 91 of the preform 90, and the urging means 70 is contracted. The nozzle part 40 retreats to the base end side of the pipe part 50. That is, even if the vacuum nozzle 30 is further pushed in after the flange 41 of the nozzle portion 40 contacts the opening edge 91 of the preform 90, there is a play L (see FIG. 3) in which the nozzle portion 40 slides. Since the nozzle portion 40 can be retracted by an amount that maximizes L, when the flange 41 comes into contact with the preform 90, no excessive force acts on the flange 41 or the preform 90. Therefore, the flange 41 and the preform 90 are not broken.

  By providing the nozzle portion 40 with the play L, the nozzle portion 40 can be pressed against the preform 90 by the play, so that when the vacuum nozzle 30 receives the preform 90, the opening of the preform 90 is assumed. The unloader can be approached to a position where the edge 91 is the lowest position. Therefore, the preform 90 and the flange 41 can be reliably brought into contact with each other even if the heights of the opening edges 91 are not uniform among the plurality of arranged preforms 90.

  Since the preform 90 is in contact with the flange 41 of the nozzle part 40, air leakage from between the preform 90 and the nozzle part 40 is eliminated. Can be reliably sucked to the nozzle portion 40. Therefore, when the preform 90 is conveyed, the preform 90 does not fall from the vacuum nozzle 30 and the transfer failure can be suppressed.

  In this state, as shown by an arrow in FIG. 1, the receiving device 20 rotates the arm 24 while moving the receiving table 25 away from the unloader to move the receiving table 25 to just above the transfer device 12. After that, the suction by the suction pump is released. As a result, the preform 90 drops from the nozzle unit 40, and the preform 90 can be transported to the transfer device 12. After that, the interval between the preforms 90 may be adjusted by the transfer device 12 and sent out to the slat conveyor 14.

  The embodiments described above are for explaining the present invention, and should not be construed as limiting the invention described in the claims or reducing the scope thereof. Further, the configuration of each part of the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made within the technical scope described in the claims.

  For example, the shapes of the nozzle section 40, the pipe section 50, the mounting section 60, and the like, the method of mounting the vacuum nozzle 30 to the receiving table 25, and the like are not limited to the above embodiment.

  In the above description, the nozzle unit 40 is urged by the urging means 70 with respect to the tube unit 50. However, when the vacuum nozzle 30 sucks the preform 90, the tip of the nozzle unit 40 faces downward. In such a case, the urging means 70 can be omitted.

DESCRIPTION OF SYMBOLS 10 Preform conveyance apparatus 20 Preform receiving apparatus 25 Receiving stand 30 Vacuum nozzle 40 Nozzle part 50 Pipe part 70 Energizing means 90 Preform

Claims (4)

A vacuum nozzle for preform suction,
A tube connected to the suction pump;
A tubular portion fitted slidably in the tube portion and insertable into the preform, and a flange protruding from a base end of the tubular portion and integrally formed with the tubular portion , wherein an opening of the preform is provided. A nozzle portion having a flange with which the edge can abut ,
Vacuum nozzle for preform suction. Equipped with biasing means for biasing the tip of the nozzle portion from the pipe portion in a protruding direction,
The vacuum nozzle for preform suction according to claim 1. A stopper is formed at the tip of the tube,
The nozzle portion includes a stopper contact portion engageable with the stopper.
The vacuum nozzle for preform suction according to claim 1 or 2. A receiving table provided with a plurality of vacuum nozzles for preform suction according to any one of claims 1 to 3,
A suction pump connected by a pipe to each pipe of the plurality of vacuum nozzles,
A preform receiving device.

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