JPH09254931A - Apparatus for taking out packaging bag in vacuum-packaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably hold and take out a packaging bag in a vacuum chamber without damaging for moving and discharging it onto a discharge conveyer and also enable high speed operation of a vacuum-packaging machine. SOLUTION: An apparatus for taking out packaging bags includes a holding means 18 for holding an upper part of a packaging bag 1 in a vacuum chamber 15 at a packaging bag take-out position HS and opening at a packaging discharging position HE and a moving means 19 for rotating the holding means by a predetermined angle for changing its orientation while moving it outward from the vacuum chamber, wherein a moving trace of the packaging bag is set toward the packaging bag discharging position HE while it is escapably kept farther in a direction of a vacuum-chamber rotating from a normal line (f) set at the packaging bag take-out position HS with respect to a trace (e) for transferring the packaging bag of the vacuum table. The holding means 18 has its front part rotatably pivoted at a pin shaft 20 at a tip of a first swing lever 41 and a rear end rotatably pivoted to a pin shaft 43 at a tip of a second swing lever 44.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for taking out a packaging bag in a vacuum packaging machine for foods and the like.

[0002]

2. Description of the Related Art The applicant of the present invention first delivered a packaging bag to a discharge conveyor in a consistently good drop state in the take-out step of an intermittent rotary vacuum packaging machine, and then packed the case in the subsequent step, sterilized, etc. 9 and 1 for the purpose of facilitating automation.
0 has been devised and filed (see Japanese Utility Model Laid-Open No. 5-40106).

The take-out device is provided with a large number of vacuum chambers (not shown) having a mechanism for holding the packing bag 1 containing the filled material in a suspended state around the intermittent rotary table T, and the table is intermittently rotated. Is a packaging bag removing device applied to a vacuum packaging machine in which vacuum processing and sealing processing are sequentially performed on the packaging bag in the vacuum chamber in the process of carrying out, and a drive shaft 2 provided at a position in front of the packaging bag removing step position. An arm 3 whose base end is attached to the drive shaft 2 and swings horizontally in association with the intermittent rotation of the table T, and a horizontal rod 4 attached to the tip of the arm 3.
And a suction cup 5 attached to the rod 4 in an orthogonal state.

In the above-mentioned take-out device, the arm 3 is swung forward by turning the drive shaft 2 (arrow a) (solid line position →
(Position indicated by imaginary line), the suction cup 5 comes into contact with the front surface of the body of the packaging bag 1 in the vacuum chamber with the lid opened to vacuum-suck the packaging bag 1, and the drive shaft 2 rotates in the opposite direction (arrow b). As a result, the arm 3 swings backward (position of virtual line → position of solid line), and the adsorbed packaging bag 1 is taken out from the vacuum chamber. A slide table 6 whose height and inclination angle can be adjusted appropriately is provided below the locus of the arm 3 which is reciprocated and swung, and the packaging bag 1 vacuum-adsorbed when the arm 3 is reciprocally swung is slid. It is configured to move above the table 6, where the vacuum of the suction cup 5 is cut and drops, and slides on the inclined upper surface of the slide table to move to the discharge conveyor 7.

[0005]

However, in the above conventional example, the suction cup 5 is provided on the front surface of the body of the hanging packaging bag made of the heat-fusible plastic film or the aluminum foil laminated film.
Therefore, the following problems occur because the packaging bag 1 is taken out of the vacuum chamber by vacuum suction and horizontal reciprocating swing of the suction cup 5.

1) When the bag mouth is sealed, a heater is pressed against the bag mouth in a vacuum chamber through a Teflon (registered trademark) sheet to heat-seal the film for sealing, and the Teflon sheet is used as a packaging bag. The outer surface may be welded, which increases over time after the start of the operation of the packaging machine. In addition, an adhesive filling material often adheres to the gripping claws of the bag in the vacuum chamber, but this also increases over time after the start of the operation of the packaging machine. On the other hand, the suction position of the packaging bag by the suction cup 5 is almost at the center of the packaging bag, and the fusion or adhesion positions of the packaging bags are spaced apart from each other such as the bag mouth. May occur and damage it. Especially high-speed type vacuum packaging machine (high-speed type has a packing capacity of 50-60 bags / min, normal type 20-45)
In the case of (bag / min), the packaging bag is damaged more frequently because it is frequently taken out and peeled off at a high speed.

(2) Since only one side of the body portion of the hanging packaging bag is adsorbed and taken out by the suction cup, the packaging bag cannot be held when the weight of the product is large, and the packaging bag falls on the way. (3) In the case of a product in which the body of the packaging bag has irregularities or a product that is vacuum-packaged in a state of being lumped on the bottom of the bag, the front surface of the body of the packaging bag has a large inclination, and suction by the suction cup is not reliable. (4) In the case of a high-speed type vacuum packaging machine, the suction valve suction “on / off” vacuum valve switching frequency increases, but there is a problem that the switching timing adjustment is difficult and suction malfunctions easily occur, which limits speedup. It is one of the factors that This is because the time to reach a vacuum and the time required to break the vacuum are long, and the time varies widely. (5) In a high-speed type vacuum packaging machine, it is uneconomical to take out a packaging bag with high frequency and surely because a dedicated vacuum pump for taking out a large air volume is required.

(6) In the conventional device, as shown in FIG. 9, the discharging direction (arrow c) of the packaging bag 1 from the discharging device and the discharging direction (arrow d) of the conveyor 7 are different from each other by an angle θ. However, in order to automate the post-process, the sliding table is bent at an angle θ so that the packaging bag is transferred onto the discharge conveyor 7 so that the longitudinal direction of the conveyor and both sides of the packaging bag 1 are parallel to each other. There is. The sliding direction of the packaging bag is the side 6a of the sliding table.
Since it is corrected while sliding using the guide as a guide, the friction transfer resistance causes variations in the timing of transfer of the discharge conveyor, which may cause the packaging bag conveyance pitch to be squeezed or the posture to be drooped.
This is an obstacle to the automation of the post-process.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and is filled with a filling material while being hung down on the conveying path of a packaging bag of an intermittently rotating vacuum table. A packaging bag take-out device that is applied to a vacuum packaging machine that has a plurality of vacuum chambers with a built-in mechanism for gripping the packaging bag and that sequentially performs steps such as vacuum processing and sealing processing in the vacuum chambers. There is a clamping means for clamping the upper part of the packaging bag in the vacuum chamber opened in the packaging bag removal step at the packaging bag removal position and opening it at the packaging bag discharge position, and moving the clamping means outside the vacuum chamber. While being provided with a moving means for rotating the bag by turning it by a predetermined angle, the movement path of the packaging bag at that time is set to the packaging bag take-out position with respect to the packaging bag conveyance trajectory of the vacuum table. A take-out device of the packaging bag in the vacuum packaging machine, characterized in that without permission apart open escape from the normal to the vacuum chamber rotates the direction in which towards the packaging bag release position outward.

More specifically, the take-out device is as follows.
A first swinging lever that is disposed near the packaging bag take-out step position and that is horizontally rotatably supported on the base end side;
A swing mechanism for swinging the first swing lever within a predetermined swing range is rotatably pin-connected to the swing end of the first swing lever on the front side, and a second swing described below on the rear side. Clamping means that is rotatably pin-connected to the swinging end of the lever and that has a pair of clamping plates that clamps the packaging bag in the front and that also has a movable clamping plate drive means, and a shaft that is horizontally rotatable on the proximal side. It is characterized in that it is provided with a second swing lever which is supported and whose swing end is rotatably pin-connected to the rear side of the sandwiching means. According to a more specific aspect,
A first swinging lever which is disposed in the vicinity of the packaging bag take-out step position, is horizontally rotatably supported on the base end side, and is provided with a pin shaft vertically oriented on the swinging end side so as to be rotatable. First
A swing mechanism for swinging the swing lever within a predetermined swing range, and a bearing for fixing the pin shaft above the front side and rotatably supporting the swing end of the second swing lever below on the rear side. Has a section,
And a clamping means having a fixed clamping plate and a movable clamping plate for clamping the packaging bag in the front and a movable clamping plate drive means, and a pivoting end that is horizontally rotatably supported at the base end side and has a swing end of the clamping means. It can be said that the bearing portion includes a second swing lever pivotally supported.

The swing mechanism of the take-out device is
For example, a third swing lever whose base end side is fixed to a drive shaft to horizontally swing within a predetermined angle range, and a swing end side of the third swing lever and a position near the first swing lever base end side are rotated. It is characterized by comprising a connecting rod movably connected and a drive means for rotating the drive shaft by a predetermined angle.

According to the packaging bag take-out device of the above vacuum packaging machine, the packaging bag gripped by the gripping claws in the vacuum chamber and subjected to the vacuum treatment and the sealing treatment is set on the packaging bag conveying path of the vacuum table. When it is sent to the taken-out position, the holding means pivotally supported by the moving means holds the upper part of the bag mouth of the packaging bag, and then the gripping claw of the bag inside the vacuum chamber is released. It Subsequently, the sandwiching means that sandwiches the packaging bag is separated from the normal line set at the packaging bag take-out position with respect to the packaging bag transport locus in the rotation direction of the vacuum chamber, and is disengaged from the normal line to the outside in a substantially S-shaped locus. Move towards
Moreover, the direction of the holding plate of the holding means is changed from the direction parallel to the direction of the packaging bag in the chamber to, for example, approximately 45 ° to the packaging bag discharging direction, and the packaging bag is moved to the discharging position and the packaging bag is placed on the slide table. Discharge and deliver on discharge conveyor.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a device for taking out a packaging bag in a vacuum packaging machine according to the present invention will be described more specifically with reference to FIGS. FIG. 1 is an overall view of a vacuum packaging system in which an intermittent rotary table type bag packing and packaging machine A and a vacuum packaging machine B are arranged side by side on a base 10. In the bag packing and packaging machine A, empty space supplied from a bag storage device 11 is shown. The packaging bag is grasped by the grasping claws 13 provided around the table 12, and the bag mouth opening, solid material filling, liquid material filling, deaeration, bag mouth sealing ( After sequentially performing steps such as (temporary sealing), the packing bag that has been filled in the discharging step is gripped by a gripping device (not shown) and transferred to the vacuum packaging machine B.

The vacuum packaging machine B is provided with a plurality of vacuum chambers 15 around a vacuum table 14 which rotates intermittently. Here, the packaging bag 1 filled with the packing by the bag packaging machine A is placed in the vacuum chamber 15. Gripping by the gripping mechanism of
During the intermittent rotation of the vacuum table 14, a vacuum process, a bag mouth seal process, and the like are performed. And
In the take-out step, the processed packaging bag is sandwiched by the take-out device 16 installed near the vacuum packaging machine B, taken out from the vacuum chamber 15, discharged onto the discharge conveyor 17, and discharged to the next step. Of course, at the position where the vacuum chamber 15 receives the packaging bag and the position where the packaging bag is taken out, the lid 15a is open.

Referring to FIG. 2, the vacuum chamber 15 shown in cross section is stopped at the take-out step position, and the take-out device 16 puts the upper part of the packaging bag 1 in the vacuum chamber 15 forwarded to the take-out step into the packaging bag. From the holding means 18 for holding at the take-out position and opening at the packaging bag discharge position, and the moving means 19 for moving the holding means 18 to follow the locus from the packaging bag take-out position to the packaging bag discharge position for the sandwiched packaging bag 1. Become.

As shown in FIGS. 3 to 6, the structure of the sandwiching means 18 includes a fixed sandwiching plate 21 and a movable sandwiching plate 22 for securing the pin shaft 20 to the upper side and sandwiching the packaging bag 1 to the front. A support box 23, an air cylinder 24 fixed to the rear of the support box 23 to drive the movable holding plate 22, and a bearing 25 at the rear end.
And a bearing link 26 that sandwiches the air cylinder 24 with the support box 23. The fixed sandwiching plate 21 is fixed to the lower part of the front wall of the support box 23, and has sandwiching pieces 21a facing the front at both ends. On the other hand, the movable holding plate 22 is the support box 2
3 is fixed to the lower part of a movable piece 29 having a pin 28 rotatably fitted to a bearing 27 fixed to the upper part of the front wall of the third piece, and a holding piece 22a facing rearward at both ends. A Y-shaped metal fitting 31 is attached to the tip of the piston rod 30 of the air cylinder 24 via a lock nut 32.
The rear end of the link 34 is rotatably supported by the pin 33 fixed to the tip of the mold fitting 31, and the front end of the link 34 is rotatably supported by the pin 35 fixed in the middle of the movable piece 29. Has been done. When the air cylinder 24 is operated, its driving force causes the movable piece 29 to swing around the pin 28 via the piston rod 30, the Y-shaped metal fitting 31, the link 34, etc., and the packaging bag 1 is sandwiched by the movable sandwiching plate 22. (Solid line position in FIG. 3) or open (phantom line position in FIG. 3).

As shown in FIGS. 2 and 7, the moving means 19 is provided with a bearing stand 3 which is erected on the base 10 so as to sandwich the discharge conveyor 17 between the vacuum table 14 and the vacuum table 14.
8, the fixed arm 3 whose base end is fixed to the bearing stand 38
9, a base end of which is rotatably supported by a pin shaft 40 at the tip of the fixed arm 39 so as to be horizontally rotatable, and a pin shaft 20 which is vertically oriented on the swing end side is rotatably provided; A second swing lever 44, which is horizontally rotatably supported by a pin shaft 42 at its end and has a vertical pin shaft 43 fixed to the swing end side, and a drive shaft 45, which is rotatably supported by a bearing stand 38. , A third swing lever 46 having a base end side fixed to the drive shaft 45, and a swing end connected to the swing end side of the third swing lever 46 and a position closer to the base end side of the first swing lever 41. The connecting rod 47 is fixed to the drive shaft 45 below the base 10.
Drive lever 48 and drive rod 49 for rotating the
Etc.

The pin shaft 20 at the swing end of the first swing lever 41 is fixed to the upper part of the support box 23 of the holding means 18,
The pin shaft 43 at the swinging end of the second swinging lever 44 holds the pinching means 1
It is rotatably supported by the bearing 25 at the rear end of the eight bearing links 26. The drive shaft 45, the third swing lever 46,
The connecting rod 47, the drive lever 48, and the drive rod 49 form a swing mechanism of the take-out device 16. This swing mechanism can be replaced with other means such as an air cylinder.

As described above, in the take-out device 16,
The first swing lever 41 swings around the pin shaft 40 on the rear side (the rear side in the rotation direction of the vacuum table 14) of the normal line f set at the packaging bag take-out position H _S on the packaging bag conveyance path e. The oscillating end thereof is rotatably connected to the position near the front end of the sandwiching means 18 via the pin shaft 20, and the second oscillating lever 44 is forward of the normal line f (in the rotating direction of the vacuum table 14). The pin shaft 42 on the front side (see front side) swings, and the swinging end thereof is located at the rear end position of the pinching means 18.
It is rotatably connected via a drive rod 48 and moves back and forth between a solid line position and an imaginary line position as the drive rod 48 moves forward and backward. The packaging bag transportation locus e is the transportation locus of the packaging bag 1 gripped in the vacuum chamber 15 (the transportation locus of the central position of the packaging bag), and the packaging bag take-out position H _S is the packaging bag take-out step. This means the center position of the packaging bag 1 in the vacuum chamber 15 stopped at step 1. In this example, the center positions of the fixed holding plate 21 and the movable holding plate 22 when the packaging bag 1 is held are made to coincide with this.

When the packaging bag 1 is taken out from the vacuum chamber 15 stopped in the packaging bag taking out step, the holding means 18 is provided.
Is brought to the position indicated by the solid line, and the air cylinder 24 is operated to clamp the upper portion of the packaging bag 1 whose side edges are gripped in the vacuum chamber 15, for example. At this time, the fixed holding plate 21 and the movable holding plate 22 of the holding means 18 are set to be perpendicular to the normal line f (parallel to the packaging bag 1) as shown in the drawing. Immediately after the packaging bag 1 is sandwiched between the sandwiching plates 21 and 22, the packaging bag 1 is released from being grasped by the grasping mechanism in the vacuum chamber 15.

When the packaging bag 1 taken out is discharged, the holding means 18 comes to the imaginary line position and the center of the packaging bag 1 comes to the packaging bag discharging position H _E. Below the holding means 18 at this position, as shown in FIG. 7, a slide base 53 is provided so that the vertical position can be adjusted with respect to a stand 52 standing on the base 10, and the slide direction of the slide base 53 is a plane. It is straight as viewed and aligned in the discharge direction d of the discharge conveyor 17. Then, the direction of the holding means 18 is changed by about 45 ° during the movement process, and the direction of the packaging bag 1 at this position is set so as to align with the sliding direction (in other words, the sliding direction of the sliding base 53, The fixed holding plate 21 and the movable holding plate 2 at this position
2 is set to be vertical). That is, the discharge direction c from the holding means 18 and the discharge conveyor 17
The discharge direction d of is the same direction, and at this position, the holding means 18
The packaging bag 1 released from the above is smoothly transferred onto the discharge conveyor 17 without disturbing the conveyance pitch or posture.

On the other hand, FIG. 8 shows the locus g of the pin shafts 20 and 43,
3 shows h and the movement trajectory i of the packaging bag 1 by the holding means 18. As shown in this figure, the loci g and h each draw an arc, and the movement locus i of the packaging bag 1 escapes from the first packaging bag take-out position H _{S in} the rotation direction of the vacuum chamber 15 (that is, the normal line). It goes outwards (while being separated from f in the rotating direction of the vacuum chamber 15), and follows a substantially S-shaped locus as a whole to reach the packaging bag discharging position H _E.

Since the packaging bag 1 draws such a locus of movement i, even if the packaging chamber 1 that is clamped and moved is still inside the vacuum chamber 15, the packaging chamber 1 will not rotate even if the vacuum chamber 15 starts to rotate. Since it moves in the same direction as the vacuum chamber 15, the vacuum chamber 15 and the packaging bag 1 do not immediately interfere with each other. That is, the timing of moving the holding means 18 and the timing of starting the rotation of the vacuum chamber 15 can be slightly overlapped, which means that one of the restrictions on speeding up the operation is removed.

The packaging bag take-out device has the following effects in addition to the above-described effects. -Clamping plates 21 and 2 for holding the upper portion of the packaging bag even if fusion or adhesion occurs in the seal portion or the grip portion of the packaging bag 1 in the vacuum chamber 15.
Since it is sandwiched between 2 and taken out, there is no peeling off and therefore the packaging bag is not damaged. -Because the sandwiching part is the upper part of the packaging bag 1, it is possible to reliably remove the packaging bag 1 regardless of the form of the unevenness or inclination of the body of the packaging bag caused by the suction cup suction type product. .・ Because the entire width of the bag mouth of the packaging bag 1 is securely sandwiched from the take-out position to the discharge position, the direction is changed to the discharge direction while moving in the hanging state, and the product is discharged onto the slide table and delivered to the discharge conveyor, so the packaging The packaging bag can be taken out frequently and reliably regardless of the size and weight of the bag. Therefore, it is suitable as a take-out device for a high-speed vacuum packaging machine. -Since no vacuum is used for taking out the packaging bag 1, there is no timing malfunction or troublesome setting changes even at high speeds.

[0025]

According to the present invention, when the packaging bag is taken out from the vacuum chamber, the packaging bag can be securely held and moved from the take-out position to the discharge position without damaging the packaging bag. In addition, since the movement path of the packaging bag is set so that it escapes in the direction of rotation of the vacuum chamber and goes outward, it is possible to further increase the speed, and since it is not a suction type due to vacuum, there is a timing malfunction even at high speed operation. The effect is that there is no need to bother with setting changes. Furthermore, since the packaging bag can be discharged in the same direction as the discharging direction of the discharging conveyor installed in the extremely limited space near the vacuum table on the machine base, there is no need to bend the sliding table and automation of post-process automation is possible. It is possible to eliminate dripping only in the conveyance pitch and posture of the packaging bag which is an obstacle.

[Brief description of drawings]

FIG. 1 is an overall view of a vacuum packaging system incorporating a packaging bag removing device according to the present invention.

FIG. 2 is a plan view showing the overall structure of the packaging bag takeout device.

FIG. 3 is a side sectional view of an essential part of the sandwiching means of the packaging bag.

FIG. 4 is a cross-sectional plan view of the main part of the sandwiching means of the packaging bag.

FIG. 5 is a front view of the packing bag holding means.

FIG. 6 is a partially cutaway perspective view of the packing bag holding means.

FIG. 7 is a side view showing the overall structure of the discharging portion of the packaging bag.

FIG. 8 is an explanatory diagram of an operating state of the sandwiching means of the packaging bag.

FIG. 9 is a plan view showing a conventional device for taking out a packaging bag.

FIG. 10 is a side view showing a conventional device for taking out a packaging bag.

[Explanation of symbols]

14 vacuum table 15 vacuum chamber 16 packaging bag take-out device 17 discharge conveyor 18 clamping means 19 moving means 20 pin shaft 21 fixed clamping plate 22 movable clamping plate 41 first swing lever 44 second swing lever 45 drive shaft 46 third Swing lever e Packaging bag conveyance trajectory f Normal line i Packaging bag movement trajectory H _S Packaging bag take-out position HE _E Packaging bag discharge position

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[Procedure amendment]

[Submission date] March 28, 1996

[Procedure amendment 1]

[Document name to be amended] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Change

[Correction contents]

FIG. 7

Claims (3)

[Claims] 1. A plurality of vacuum chambers having a built-in mechanism for gripping a packaging bag filled with a filling material in a state of being hung down on a transportation path of a packaging bag of an intermittently rotating vacuum table, wherein the vacuum chamber is provided. A packaging bag take-out device that is applied to a vacuum packaging machine that sequentially performs processes such as vacuum treatment and sealing treatment, and packs the upper part of the packaging bag in the vacuum chamber opened in the packaging bag take-out process. Clamping means for clamping at the bag take-out position and opening at the packaging bag discharge position, and moving means for changing the direction by rotating the sandwiching means to the outside of the vacuum chamber by a predetermined angle and moving path of the packaging bag at that time However, the outer packaging bag is discharged while it is separated from the normal line set at the packaging bag take-out position of the vacuum table in the packaging bag take-out position in the direction of the vacuum chamber rotation and is opened without permission. A device for taking out a packaging bag in a vacuum packaging machine, which is directed to a position. 2. A first unit which is arranged in the vicinity of a packaging bag take-out step position and which is rotatably supported horizontally at the base end side.
A swing lever, a swing mechanism for swinging the first swing lever within a predetermined swing range, and a swing end of the first swing lever that is rotatably pin-connected on the front side, and on the rear side. It is rotatably pin-connected to the swing end of the second swing lever described below,
And a sandwiching means having a pair of sandwiching plates for sandwiching the packaging bag at the front and a movable sandwiching plate driving means, and a pivoting end horizontally rotatably supported at a base end side and a rear end of the sandwiching means. The device for taking out a packaging bag in a vacuum packaging machine according to claim 1, further comprising a second swing lever pivotally connected to the pin. 3. A third swing lever, wherein the swing mechanism has a base end side fixed to a drive shaft and horizontally swings within a predetermined angle range;
It is characterized by comprising a connecting rod rotatably connected to a position near the oscillating end of the oscillating lever and a base end side of the first oscillating lever, and drive means for rotating the drive shaft by a predetermined angle. A device for taking out a packaging bag in the vacuum packaging machine according to claim 2.