JP6046970B2 - Film transport device and deep drawing packaging machine - Google Patents

Description

  The present invention relates to a film transport device and a deep drawing packaging machine.

  In a line for packaging foods such as sliced ham and other articles, for example, a deep-drawing packaging machine is used (see, for example, Patent Document 1). The deep-drawing packaging machine includes, in order from the upstream side, a lower film supply unit, a pocket molding unit, a filling unit, an upper film supply unit, a vacuum seal unit, a horizontal cut unit, and a vertical cut unit.

  A lower film supply part supplies the lower film which has a width | variety about several package bodies (for example, 3 pieces) continuously. The pocket molding part molds a pocket in the lower film by pressing with a mold. The filling unit fills the pocket with the article. The upper film supply unit continuously supplies an upper film having substantially the same width as that of the lower film, and covers the lower film. The vacuum seal unit seals the film after evacuation. The horizontal cut portion cuts the film in the horizontal direction (width direction) to form a package of a plurality of (for example, three). The vertical cut section cuts a plurality of package bodies in the vertical direction (conveying direction) into individual package bodies.

  Such a deep-drawing packaging machine intermittently conveys a film by a film conveying device, and processes each part when the film is stopped. The film transport device supports both ends of the film with claws provided in the circulating chain, and transports the film by running the chain intermittently.

Patent No. 4485220

  The chain that runs intermittently expands and contracts when the drive starts or stops. As a result, there is a problem that the film supported by the chain claw also expands and contracts and wrinkles are approached.

  Recent trends include: 1. Various devices (1. a device for detecting the quality of a molded pocket, 2. a device for detecting the presence or absence of a product (article), 3. a device for detecting the quality of a product (for example, a product is a syringe) In the case of No., it is determined that there is no cap.) 4. A device for detecting the jumping out of the product, 5. An automatic feeding device (such as a robot), 6. A total trimming device (for example, a plurality of punching devices)) The deep-drawing packaging machine is becoming larger. As the deep-drawing packaging machine becomes larger, the chain becomes longer and, as a result, the chain becomes heavier. For this reason, when the drive is stopped, the impact applied to the chain by the inertial force is increased. In addition, the length of the chain increases, so that the stretchable length of the stretchable portion is long. From such a trend, the above problem has become apparent.

  Such problems are not limited to the case of a deep-drawing packaging machine, and can be assumed in common with other packaging machines as long as the film is conveyed intermittently.

  This invention is made | formed in view of the said subject, and it aims at providing the film conveyance apparatus and deep drawing packaging machine which prevent that a wrinkle approaches a film.

(1) The present invention provides a pair of chains that are arranged along the film on both sides in the width direction of the belt-like film and that run intermittently integrally with each other, and are attached to the pair of chains. a plurality of claws which support both ends widthwise of, provided one on the upstream side and downstream side, and a two motor driving integrated the pair of chains, the start of driving, the upstream motor Then, the downstream motor is driven at a lower speed than the upstream motor, and then the upstream motor and the downstream motor are driven at the same speed. The chain is run intermittently by driving the upstream motor at a lower speed than the downstream motor to stop the upstream motor and then stopping the downstream motor. , Characterized in that, a film transport device.

  According to the present invention, it is possible to position a large part of the extension portion of the chain in a section from the downstream motor to the upstream motor, that is, a section where the film is not supported. This prevents the chain from expanding and contracting in the section supporting the film. As a result, expansion and contraction of the film supported by the chain claw is prevented, and as a result, the film is prevented from wrinkling.

  (2) The present invention is also the film transport apparatus according to (1), wherein the film is for packaging.

  (3) The present invention is also the film transport apparatus according to (1) or (2), wherein the driving speeds of the two motors are individually controlled.

  (4) The film according to any one of (1) to (3), wherein the two motors are individually controlled in timing of driving start or driving stop. It is a transport device.

  According to the invention described in the above (3) or (4), the tension applied to the chain can be prevented from fluctuating significantly in the section supporting the film. This further prevents the chain from expanding and contracting in the section supporting the film. As a result, expansion and contraction of the film supported by the chain claw is further prevented, and as a result, the film is further prevented from wrinkling.

  (5) The film according to any one of (1) to (4) above, further comprising feed amount correction means for correcting the feed amount of the pair of chains by the two motors. It is a transport device.

  According to the above-described invention, even when the chain is extended, that is, when the extension length of the chain is increased, the chain 11 is corrected by correcting the chain feed amount. Can cope with the growth.

  (6) The present invention is also a deep-drawing packaging machine comprising the film transport device according to any one of (1) to (5) above.

  According to the film conveyance apparatus as described in said (1)-(5) of this invention and the deep drawing packaging machine as described in said (6), it can prevent that a film wrinkles.

It is the schematic which shows the deep drawing packaging machine which concerns on embodiment of this invention. It is the schematic which shows the film conveyance apparatus with which a deep drawing packaging machine is provided. It is a timing chart which shows the 1st example of transition of the rotational speed of each motor, and the tension | tensile_strength applied to a chain. It is a timing chart which shows the 2nd example of transition of the rotational speed of each motor, and the tension | tensile_strength applied to a chain. It is a timing chart which shows the 3rd example of transition of the rotational speed of each motor, and the tension | tensile_strength applied to a chain. It is a timing chart which shows the 4th example of transition of the rotation speed of each motor, and the tension applied to a chain.

  Hereinafter, a deep drawing packaging machine according to an embodiment of the present invention will be described in detail with reference to the drawings.

  First, the structure of the deep drawing packaging machine 1 is demonstrated using FIG. FIG. 1 is a schematic view showing a deep drawing packaging machine 1. In addition, in this figure and each subsequent figure, one part structure is abbreviate | omitted suitably and drawing is simplified. In each figure and subsequent figures, the size and length are exaggerated as appropriate.

  A deep-drawing packaging machine 1 shown in FIG. 1 is used in a line for sequentially packaging articles (not shown) such as sliced ham. The deep-drawing packaging machine 1 sequentially wraps the sliced ham while transporting the strip-shaped films YA1 and YA2 for packaging by a film transport device 10 (see FIG. 2) described later. Specifically, the deep-drawing packaging machine 1 includes, in order from the upstream side, a lower film supply unit 2, a pocket molding unit 3, a filling unit 4, an upper film supply unit 5, a vacuum seal unit 6, a horizontal cut unit 7, and a vertical cut unit. It is classified into 8 etc.

  Each part of the deep-drawing packaging machine 1 is comprehensively controlled by a control unit (not shown) so as to execute processing when the films YA1 and YA2 are stopped. The control unit includes a CPU, a RAM, a ROM, and the like, and executes various controls. The CPU is a so-called central processing unit, and various programs are executed to realize various functions. The RAM is used as a work area for the CPU. The ROM stores a basic OS and programs executed by the CPU.

  The lower film supply unit 2 continuously supplies the lower film YA1 having a width corresponding to several package bodies XA1 (three in the present embodiment). The pocket molding part 3 is pressed with a mold (reference numeral omitted) to mold a pocket (reference numeral omitted) in the lower film YA1. The filling unit 4 fills the pocket with sliced ham. The upper film supply unit 5 continuously supplies the upper film YA2 having substantially the same width as the lower film YA1, and covers the lower film YA1. The vacuum seal 6 seals the films YA1 and YA2 after evacuation.

  The horizontal cut portion 7 cuts the films YA1 and YA2 in the horizontal direction (width direction) to form a package XA1 having a plurality of packages (three in this embodiment). The vertical cut unit 8 cuts the plurality of package bodies XA1 in the vertical direction (conveyance direction) to form individual package bodies XA1.

  Next, the structure of the film conveyance apparatus 10 is demonstrated using FIG. FIG. 2 is a schematic view showing the film transport apparatus 10.

  The film transport apparatus 10 shown in FIG. 2 may be a control unit (a control unit common to the deep-drawing packaging machine 1 or an individual control unit that is linked to the control unit of the deep-drawing packaging machine 1). Controlled, the films YA1 and YA2 are intermittently conveyed. Specifically, the film transport apparatus 10 includes a pair of chains 11, a plurality of sprockets 12 to 21, a plurality of claws 22, a motor 23 provided on the upstream side, a motor 24 provided on the downstream side, A feed amount correcting means 25, and the like.

  The pair of chains 11 are arranged along the films YA1 and YA2 on both sides in the width direction of the films YA1 and YA2, and are hooked on the plurality of sprockets 12 to 21. The pair of chains 11 travels intermittently (integrally at a constant speed) with each other by the power of the motors 23 and 24. A plurality of claws 22 are attached to the pair of chains 11 at an equal pitch.

  The plurality of claws 22 support both ends of the films YA1 and YA2 in the width direction. Specifically, the plurality of claws 22 open at the sprocket 21 at the upstream end and grip the film YA1. Further, the plurality of claws 22 are opened at the sprocket 12 at the downstream end to release the films YA1 and YA2.

  The upstream motor 23 is provided between, for example, the pocket molding unit 3 and the filling unit 4. The downstream motor 24 is provided between, for example, the upper film supply unit 5 and the vacuum seal unit 6. Each of these motors 23 and 24 rotates the sprockets 18 and 15 to drive a pair of chains integrally. The motors 23 and 24 are individually controlled in driving speed as will be described in detail later. In addition, as will be described later in detail, each motor 23 and 24 is individually controlled in terms of drive start timing or drive stop timing.

  The feed amount correcting means 25 includes, for example, a monitor (not shown) that displays the feed amount of the pair of chains 11 and an input unit (not shown) that receives an input from a worker based on the display on the monitor. Yes. Based on the signal from the input unit, the control unit drives the motors 23 and 24 to correct the feed amount of the pair of chains 11. The feed amount correcting means 25 may not include an input unit. In this case, the worker needs to directly operate the pair of chains 11 to correct the feed amount.

  Next, the relationship between the rotational speeds of the motors 23 and 24 and the tension applied to the pair of chains 11 will be described with reference to FIGS. FIG. 3 is a timing chart showing a first example of the transition of the rotational speeds of the motors 23 and 24 and the tension applied to the chain 11. FIG. 4 is a timing chart showing a second example of the transition of the rotational speeds of the motors 23 and 24 and the tension applied to the chain 11. FIG. 5 is a timing chart showing a third example of the transition of the rotational speeds of the motors 23 and 24 and the tension applied to the chain 11. FIG. 6 is a timing chart showing a fourth example of the transition of the rotational speeds of the motors 23 and 24 and the tension applied to the chain 11.

  The first example shown in FIG. 3 is a case where the drive start timing and the drive stop timing are the same and the drive speeds are the same for the two motors 23 and 24. That is, the two motors 23 and 24 are driven in synchronization. However, when the chain 11 in the transport section extends by a predetermined amount (when the tension applied to the chain 11 in the transport section increases), the upstream motor 23 is stopped automatically or manually, and then the downstream side This is dealt with by stopping the motor 24 after driving the chain 11 for the extension amount. In the case of the automatic adjustment mode, a sensor (not shown) for detecting the tension of the chain 11 is arranged.

  The second example shown in FIG. 4 is a case where the drive start timing and the drive stop timing are the same for the two motors 23 and 24, and the drive speeds are individually controlled.

  Specifically, at the start of driving, the upstream motor 23 is driven at a higher speed than the downstream motor 24 to loosen the chain 11 in the transport section (section in which the films YA1 and YA2 are supported by the claws). Transport. Thereafter, the motors 23 and 24 are driven at the same speed to convey the chain 11 with a constant tension. When driving is stopped, the motor 23 on the upstream side is driven at a lower speed than the motor 24 on the downstream side to stop the chain 11 in the conveying section as it is stretched. By repeating this series of flows, the chain 11 is caused to travel intermittently.

  The second example shown in FIG. 5 is a case where the drive start timing and the drive stop timing are individually controlled for the two motors 23 and 24 and the drive speeds are the same.

  Specifically, at the start of driving, the upstream motor 23 is driven in advance to loosen the chain in the transport section. Thereafter, the downstream motor 24 is subsequently driven to convey the chain 11 with a constant tension. When the drive is stopped, the upstream motor 23 is stopped in advance so that the chain in the transport section is stretched. Thereafter, the downstream motor 24 is subsequently stopped. By repeating this series of flows, the chain 11 is caused to travel intermittently.

  The third example shown in FIG. 6 is a combination of the above two examples. That is, for the two motors 23 and 24, the drive start timing and the drive stop timing are individually controlled, and the drive speed is individually controlled.

  Specifically, at the start of driving, the upstream motor 23 is driven in advance to loosen the chain in the transport section. Thereafter, the downstream motor 24 is driven and driven at a lower speed than the upstream motor 23 to convey the chain 11 while gradually keeping the tension applied to the chain 11 constant. Thereafter, the motors 23 and 24 are driven at the same speed to convey the chain 11 with a constant tension. When the drive is stopped, the upstream motor 23 is driven at a lower speed than the downstream motor 24 so that the chain 11 in the transport section is gradually stretched. Thereafter, the upstream motor 23 is stopped in advance so that the chain 11 is stretched in the conveyance section. Thereafter, the downstream motor 24 is subsequently stopped. By repeating this series of flows, the chain 11 is caused to travel intermittently.

  As described above, according to the film transport apparatus 10 provided in the deep-drawing packaging machine 1, a large portion of the extension portion of the chain 11 is divided into a section from the downstream motor 24 to the upstream motor 23, that is, the film YA1. , YA2 can be located in a section not supported. Thereby, it is prevented that the chain 11 expands and contracts in the section supporting the films YA1 and YA2. As a result, the expansion and contraction of the films YA1 and YA2 supported by the claws 22 of the chain 11 is prevented, and as a result, the films YA1 and YA2 are prevented from wrinkling.

  Since the drive speeds of the two motors 23 and 24 are individually controlled, or the drive start timing or the drive stop timing of the two motors 23 and 24 is individually controlled, the tension applied to the chain 11 Can be prevented from fluctuating significantly in the section supporting the films YA1 and YA2. This further prevents the chain 11 from expanding and contracting in the section supporting the films YA1 and YA2. As a result, the expansion and contraction of the films YA1 and YA2 supported by the claw 22 of the chain 11 is further prevented, and as a result, the wrinkles of the films YA1 and YA2 are further prevented.

  Further, since the feed amount correcting means 25 is provided, even when the chain 11 is extended, that is, when the extension length of the chain 11 is increased, the chain 11 By correcting the feed amount, it is possible to cope with the elongation of the chain 11.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit and technical idea thereof.

  That is, in the above-described embodiment, the range, position, size, length, order, shape, material, orientation, quantity, and the like of each configuration and each part can be changed as appropriate.

  Or in the said embodiment, although the film conveyance apparatus 10 with which the deep drawing packaging machine 1 is provided was demonstrated to the example, if the film conveyance apparatus of this invention conveys a film intermittently, another packaging machine will be You may make it prepare.

DESCRIPTION OF SYMBOLS 1 Deep drawing packaging machine 10 Film conveying apparatus 11 Chain 22 Claw 23, 24 Motor 25 Feed amount correction means YA1 Lower film (film)
YA2 Upper film (film)

Claims (6)

A pair of chains that are arranged along the film on both sides in the width direction of the belt-like film and run intermittently integrally with each other;
A plurality of claws attached to the pair of chains and supporting both ends of the film in the width direction;
Two motors that are provided one by one on the upstream side and one on the downstream side, and that integrally drive the pair of chains ,
At the start of driving, the motor on the upstream side is driven, and then the motor on the downstream side is driven at a lower speed than the motor on the upstream side,
Thereafter, the upstream motor and the downstream motor are driven at the same speed,
When the drive is stopped, the upstream motor is driven at a lower speed than the downstream motor to stop the upstream motor, and then the downstream motor is stopped to intermittently chain the chain. Make it run,
It is characterized by
Film transport device. The film is for packaging,
The film transport apparatus according to claim 1. The two motors are characterized in that drive speeds are individually controlled.
The film conveyance apparatus of Claim 1 or 2. The two motors are characterized in that drive start timing or drive stop timing is individually controlled.
The film conveyance apparatus in any one of Claims 1-3. A feed amount correcting means for correcting the feed amount of the pair of chains by the two motors is provided.
The film conveyance apparatus in any one of Claims 1-4. It is provided with the film conveyance device according to any one of claims 1 to 5,
Deep drawing packaging machine

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