JP2849071B2 - Seal bar type vertical automatic packaging machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a heat-sealable packaging film which is supplied intermittently in the longitudinal direction, is guided to a forming chute, and is folded in two along the longitudinal direction so that both side edges are joined. Both side edges are vertically sealed over a length of one bag or more by a pair of vertically elongated vertical heat sealing opening / closing seal bars to obtain a tubular packaging film. A pair of horizontal heat welding opening / closing seal bars that are arranged at the downstream side horizontal seal position and open and close around the base side pivot shaft and laterally sealed to form a bottomed state,
The tubular package film is filled with the article to be packaged through the inside of the molding chute, and the horizontal heat welding opening / closing seal bar is sandwiched while the vertical film welding opening / closing seal bar is open. Moving down, pulling down, feeding the packaging film in the longitudinal direction, performing vertical sealing of the vertical heat welding open / close seal bar while the horizontal heat welding open / close seal bar opens and moves upward to the horizontal seal position, Next, the packaging film is sealed by the next horizontal seal to manufacture a packaged product, and a perforation is formed in the horizontal seal portion of the packaging film by the operation of the perforation blade incorporated in the horizontal heat welding opening / closing seal bar. The present invention relates to a seal bar type vertical automatic packaging machine for inserting or cutting.

[0002]

2. Description of the Related Art As a conventional vertical automatic packaging machine, FIG.
There is something like that shown in This is a material film F made of polyethylene, polyvinyl chloride or other thermoplastic resin.
(Forming chute) 1 while moving in the longitudinal direction
02, the sheet is folded in two along the longitudinal direction, and the folded edge is vertically welded while being continuously moved in the longitudinal direction while being sandwiched between a pair of vertical heat welding rolls 103, 103 to form a cylindrical film F1. Film F moving vertically downward
A pair of horizontal rotating horizontal heat welding rolls 1 are placed at required intervals.
04 and 104 are sequentially sealed in the horizontal direction, and intermittently, a predetermined amount of the packaging material such as drying material is supplied from the fixed amount supply device 105 through the folding tool 102 through the relay 106 to supply the next horizontal material. The package was sealed with a seal.

In this vertical automatic packaging machine, the cross-sectional shape of the folding tool 102 is an oval whose width gradually increases from the upper part where the folding of the packaging film F is performed to the middle part where the supply of the packaged material is guided. Has formed. Horizontal heat welding roll 104,
The motor 104 is driven in synchronism with the feed speed of the vertical heat welding rolls 103 from the motor M1 via gear power transmission means S1 and S2, for example. Vertical welding roll 103,
103 is driven from the motor M1 via the gear power transmission means S1. In this case, the sealed package is cut by the rotary seal 107 by the rotary cutter 107 driven by the motor M1 via the gear power transmission means S3 for each bag.

[0004] However, the vertical automatic packaging machine described above does not respond to a request to cut a perforated seam in a connecting horizontal seal portion of a predetermined number of hermetically sealed products. Japanese Patent Publication No. 40-6557 discloses a "cutting machine for automatic perforating machine" disclosed in Japanese Utility Model Publication No. 40-6557 and Japanese Utility Model Publication No. 52-136870. There is a “packaging bag cutting device” disclosed in the official gazette.

[0005] In the former perforating apparatus for cutting a perforation in an automatic packaging machine, pressing is carried out from both sides by pressing bars against the already formed horizontal seal portion of the packaging film, and one of the elastically pressed pressing bars penetrates. With the perforated blade facing, the other press-contact bar having a hole for accommodating the penetration of this blade is pressed, that is, the blade is slightly inserted into the horizontal seal portion to perform perforation, and the blade is largely horizontally moved. The press-contact bars are individually driven by the cams so as to be inserted into the seal portion and cut.

In the latter cutting device for packaging bags, a cutter having a substantially saw-toothed cutting edge is operably attached to one of a pair of right and left sealers, and one end of the cutter is reciprocally driven by a plunger of a cylinder to operate a stopper. Controls the degree of advance of the cutter, and performs perforation and cutting.

[0007]

In the former automatic perforating machine in the automatic perforating machine, the horizontal seal, the perforation and the cutting are separately performed, so that the workability is poor and the insertion of the blade is not performed. For this reason, both pressure contact bars are individually driven by separate driving devices, and the structure is complicated. Further, in the latter cutting device for packaging bags, wrinkles are likely to be generated in the horizontal seal portion in order to perform horizontal sealing by closing the pair of right and left sealers in parallel, and the cutter is reciprocated by the plunger of one end cylinder. Due to the swinging around the pin at the other end, the perforation condition becomes uneven from one end to the other end. Further, a cylinder for driving the cutter is required.

[0008] The generation of wrinkles in the horizontal seal portion will be described briefly. A pair of right and left sealers or a rotary horizontal heat welding roll 104 having a welding seal surface 104A as shown in FIG. In the case of closing, although wrinkles are partially generated in the tubular film F1 which has already been swelled by inserting a packaged material such as ingredients between the maximum intervals, FIG.
As shown in (b), the cylindrical film F1 is rolled 104,
When the aperture is squeezed by rotation of 104, the center portion first comes into contact, and since the vertical seal side is almost fixed, the film cannot escape, and wrinkles are generated, as shown in FIG. 13 (c). The rolls 104, 104 are used to seal the wrinkles in a straight line at a stretch and perform horizontal sealing, which often causes poor horizontal sealing. If a lateral seal failure occurs, the packaged product may absorb the humidity of the outside air and cause quality deterioration.

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above points, and has as its object the ability to appropriately select perforation and cutting to be performed simultaneously with the horizontal sealing, and to reduce the driving force of the perforation blade to a pair of lateral heat. It can be obtained by the lowering movement of the welding opening and closing seal bar and the cam whose position can be adjusted. In addition, the perforation to the horizontal seal part can be performed uniformly, and the blade is durable and moves in parallel in the forward and diagonal direction, so the blade lasts longer In addition, the present invention provides a seal bar type vertical automatic wrapping machine which can easily incorporate a means for preventing the occurrence of sealing failure due to the wrinkles being bittened by eliminating wrinkles from the base end side to the front end side even in a swollen packaging film. I do.

[0010]

In order to achieve the above object, a seal bar type vertical automatic packaging machine according to claim 1 of the present invention is a long heat-sealing packaging film fed intermittently in a longitudinal direction. To the forming chute and folded in two along the longitudinal direction to join both side edges, and the both side edges are vertically sealed over a length of one bag or more by a pair of vertically long vertical heat welding opening and closing seal bars. A pair of horizontal heat welding opening / closing seal bars which are disposed at a horizontal sealing position on the downstream side of the vertical heat welding opening / closing seal bar and open / close around a base side pivot shaft. And sealed horizontally to form a bottomed state. The tubular packaging film is filled with an object to be packaged via the molding chute, and the packaging film is opened while the vertical heat welding opening / closing seal bar is open. With the above The heat welding opening / closing seal bar is moved down and pulled down to feed the packaging film in the longitudinal direction, and the horizontal heat welding opening / closing seal bar is opened and moved upward to the horizontal sealing position. A vertical seal is performed, and the packaging film is sealed with the next horizontal seal to manufacture a packaged product. At the same time, the packaging film is sealed by the operation of the perforation blade incorporated in the horizontal heat welding opening / closing seal bar. In a seal bar type vertical automatic packaging machine that cuts or cuts the horizontal seal part,
The perforated blade is swingably mounted on one of the pair of horizontal heat welding open / close seal bars by a pair of parallel links so that the blade edge moves obliquely forward and parallel beyond the seal surface of the seal bar. The cam follower attached to one of the perforated blade or the parallel link is mounted on the machine side in the lowering stroke in the closed state of the pair of horizontal heat welding open / close seal bars. The cam is driven to move obliquely forward and in parallel across the seal surface in contact with the position-adjustable cam, and when the lift of the cam is reduced, the horizontal seal portion is perforated to lift the cam. It is characterized in that cutting at the horizontal seal portion is performed when the size is increased.

Accordingly, the pair of horizontal heat welding open / close seal bars intermittently move the packaging film in the longitudinal direction by their downward movement, and can take a sufficient time for the horizontal sealing, resulting in insufficient sealing. Further, at the same time as the horizontal seal, the cutting edge of the perforation blade mounted on one of the horizontal heat welding opening / closing seal bars is moved downward by the above-mentioned downward movement, so that the cam attached to one of the perforation blade or the parallel link. It is driven to move obliquely forward and parallel across the seal surface via the follower, and perforates the horizontal seal portion in accordance with the cam position, that is, when the lift of the cam is reduced, and lifts the cam. When the size is increased, cutting at the horizontal seal portion can be performed. Since the perforation blade is driven to move obliquely forward and parallel by the parallel link, sharpness is improved and uniform perforation can be performed. Furthermore, when a pair of horizontal heat welding opening / closing seal bars that move up and down are laterally sealed with an expanded packaging film, wrinkles are moved from the base end side to the front end side to eliminate the occurrence of sealing failure due to the wrinkle biting. Prevention means can be easily incorporated.

[0012] In the seal bar type vertical automatic packaging machine according to the second aspect, the cam is configured such that the lift amount is controlled by a driving means such as a rotary solenoid, and the cam position for perforation and cutting is very simply. Control is performed.

According to the third aspect of the present invention, the lift amount of the drive means such as a rotary solenoid is limited by the adjusting screw so that the degree of perforation is finely adjusted in the perforation operation. Then, the perforation degree can be finely adjusted according to the packaging film material.

In the seal bar type vertical automatic packaging machine according to the fourth aspect, the horizontal heat welding opening / closing seal bar is slightly returned to the upstream side after the horizontal sealing is started with the tubular packaging film sandwiched at the horizontal sealing position. When the tubular packaging film in the bottomed state is configured to be inflated and then moved downward, when the tubular packaging film enters the bottomed state at the start of the horizontal sealing and receives the object to be packaged, the horizontal heat welding opening and closing seal By returning the bar slightly upstream, the tubular wrapping film expands and the stuff to be wrapped is easily received, and the inside height is reduced, which is convenient for the next horizontal seal.

In the seal bar type vertical automatic packaging machine according to the present invention, at least one of the horizontal heat welding open / close seal bars is arranged so that at least one of the seal bars is opened and closed around the base-side pivot shaft. A heat-sealing seal bar that abuts against the other is elastically supported so as to reciprocate toward the other, and the elastically-supported heat-sealing seal bar is connected to the other heat-sealing seal bar at the start of the horizontal seal. Start pressure welding from the end side, shift the pressure welding to the tip side according to the closing of the opening and closing bar,
It is configured to complete the closing of the horizontal seal in a pressed and sunk state, and the perforation blade is disposed in the center groove of the sealing surface of one of the heat-sealing seal bars and the other heat-sealing seal bar. Is mounted so as to be able to advance and retreat within the lateral center groove of the seal surface.

Therefore, at least one of the laterally heat-sealing opening / closing seal bars is provided with a heat-sealing seal bar, which is in contact with the other member with respect to the opening / closing bar that opens and closes around the base pivot shaft, with the other. It is resiliently supported so as to reciprocate toward it, and is configured to complete the closing of the horizontal seal in a state where it is pushed down by the other heat welding seal bar and sunk, and rises up before hitting the other heat welding seal bar In order to push and pinch the tube-shaped packaging film between the close-up and the base end side so that it can be pressed toward the front end sequentially, the fold line from the base end side that is sealed vertically and does not escape The wrinkles in the middle can be moved toward the folded-back portion on the leading end side to be inserted to eliminate the wrinkles, and the occurrence of poor lateral sealing can be prevented. If a perforation blade is mounted on one of the lateral heat welding opening and closing seal bars, it is possible to neatly perforate the horizontal seal portion without wrinkles and to perform a clean cutting.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a seal bar type vertical automatic packaging machine according to the present invention equipped with a perforation blade will be described in detail with reference to the accompanying drawings. FIG. 1 is a vertical sectional view of a seal bar type vertical automatic packaging machine according to a typical embodiment of the present invention, and FIG. 2 is an open state showing an opening / closing mechanism of a vertical heat welding opening / closing seal bar of the vertical automatic packaging machine. Plan view,
FIG. 3 is a side view showing an opening / closing / elevation driving device for a pair of horizontal heat welding opening / closing seal bars of the vertical automatic packaging machine, FIG. 4 is a front view of the elevation driving device, and FIG. FIG. 6 is a plan view showing an open / close mechanism of the horizontal heat welding opening / closing seal bar, FIG. 6 is a plan view showing a state where the perforated blade of the vertical automatic packaging machine is mounted on the horizontal heat welding opening / closing seal bar, and FIG. FIG. 8 is a side view showing a state where the perforated blade is mounted on one of the side heat welding opening / closing seal bars, FIG. 8 is a front view showing a configuration of a position adjustable cam of the vertical automatic packaging machine, and FIG. FIG. 10 is a plan view of an open state for explaining a wrinkle prevention operation of the lateral heat welding opening / closing seal bar of the automatic packaging machine, FIG. 10 is a plan view immediately before a closed state for explaining the wrinkle prevention operation, and FIG. It is sectional drawing which followed the XI line.

First, in FIGS. 1 to 5, as an example,
The basic structure of a seal bar type vertical automatic packaging machine 1 used for packaging various instant noodle drying materials as articles to be packaged will be described below. After leading to the vertical forming chute 2 via 12 and folding it in two along the longitudinal direction, and then joining the two side edges of the folded packaging film F, these two side edges are connected to a pair of vertical Vertical heat welding open / close seal bar (hereinafter simply referred to as vertical seal bar)
3 and 3 ', and vertically sealed to form a tube, and a pair of horizontal heat welding opening / closing seal bars (hereinafter simply referred to as horizontal seal bars) 4, 4' arranged at the horizontal seal position L1 on the downstream side thereof. To make a bottomed state. The feeding of the packaging film F is performed by a downward movement of one bag length of the horizontal seal bars 4, 4 'as described later. The supply of the article to be packaged is performed immediately after the horizontal sealing of the horizontal sealing bars 4 and 4 ′, and immediately after the returning upward movement, the fixed-quantity supply device 5 intermittently passes through the chute 2 via the intermediate receiver 6 and has a bottomed tubular shape. It is performed in the packaging film F1. Each time the horizontal seal bars 4, 4 'are raised and returned to the horizontal seal position L1, the tubular packaging film F1 is changed from the bottomed state to the sealed state. While the 4 'is moved down and pulled down to feed the packaging film in the longitudinal direction, the perforation blade 7 pressed by the cam 8 sequentially perforates and cuts the horizontal seal portion of the packaging film F2. Is added.

The vertical seal bars 3, 3 'are substantially bilaterally symmetric with respect to the tubular packaging film F1 sandwiched therebetween, and have a vertically long end portion having a length of one bag or more. Seal bars 32A and 32B in which a heater 31 is vertically inserted.
And their opening and closing devices 33. The opening / closing device 33 includes a bracket B protruding horizontally from the machine base 9.
A pair of opening / closing swing levers 34 pivotally supported on the upper side 1
A and 34B are opened and closed by the reciprocating swing of the swing bar 36 via the links 35 and 35. The swing bar 36 is pivotally supported on a bracket B2 protruded horizontally from the machine base 9 at a base end thereof, and a cam follower 36 at an intermediate portion is provided.
A is constantly biased to the cam 37 by a tension spring 38, and the pair of links 35, 35 are pivotally supported at one point on the free end side. The spring 38 is connected to the cam 3
It is stretched between the tip of the bracket B3 and the tip of the swing bar 36, which is horizontally protruded from the machine base 9 so that the bearing 7 can be rotatably supported. The rotating cam 37 has a projecting portion 37A for closing the vertical seal bars 3, 3 and a retracting portion 37 for opening so as to operate in harmony with a pair of horizontal seal bars 4, 4 'described later.
B and a transition section 37C between them.

One seal bar 32A is directly connected to one open / close swing lever 34A, while the other seal bar 32B is connected to the other open / close swing lever 34B via a spring 32C. . That is, the operation bar 34C integrated with the other opening / closing swing lever 34B has
A bolt 32D is screwed through a hole in the other seal bar 32B, and a compression spring 32C is interposed between the head of the bolt 32D and the other seal bar 32B. Therefore, the other seal bar 32B, which is only swingably engaged with the other open / close swing lever 34B, is driven to open / close by the operating bar 34C of the open / close swing lever 34B via the bolt 32D and the spring 32C. become,
The vertical sealing force is given by the elasticity of the spring 32C. Screw 3 screwed to the other seal bar 32B
2E is a stopper for limiting the deflection of the spring 32C.

The opening / closing driving force of the vertical seal bars 3, 3 'is transmitted from the motor M1 to the main shaft X1 via a chain and a sprocket wheel, and then to the longitudinal axis X2 via a bevel gear, and is transmitted to the shaft X2. The fixed cam 37 is driven to rotate. When the cam follower 36A is in contact with the retracted portion 37B of the cam 37, as shown in FIG. 2, the swing bar 36 is swung backward to swing the pair of open / close swing levers 34A, 3A.
4B is swung in the opening direction via the links 35, 35 to open the seal bars 32A, 32B. When the cam 37 rotates and the cam follower 36A comes into contact with the transition portion 37C, the swing bar 36 is returned to the neutral position, and the pair of open / close swing levers 34A, 34B is set to the vertical seal start state via the links 35, 35. The seal bars 32A and 32B are brought into contact with each other. When the cam 37 further rotates and the cam follower 36A comes into contact with the protruding portion 37A, the swing bar 36 is swung forward and the open / close swing levers 34A, 34B are linked to the link 35,
By swinging in the opening direction through 35, the seal bar 32A,
32B is closed. At this time, since the link 35 corresponding to the seal bar 32B is set to be slightly longer, the opening / closing swing lever 34B is slightly swung forward by a large amount, and the operating bar 34C integrated with the lever 35B is moved through the bolt 32D and the spring 32C. Bar 32 with spring force
B is pressed against the seal bar 32A, so that the vertical seal is reliably performed.

The horizontal seal bars 4, 4 'are also substantially symmetrical with respect to the tubular packaging film F1 sandwiched therebetween, and the opening / closing / elevating drive device 40 applies a horizontal seal for each bag length. A heat-sealing seal bar 4 in which an electric heater 41 is horizontally inserted substantially over the entire length near the contact surface.
2A, 42B, and their opening / closing / elevating drive devices 40. The opening and closing device part is a vertical seal bar 3,
3 ', the pair of open / close swing levers 44A, 44B pivotably supported between a pair of upper and lower brackets B4, B4 projecting horizontally from the machine base 9 are connected to links 45, 45. The swing bar 46 is opened and closed by the reciprocating swing of the swing bar 46 via the. The swing bar 46 is pivotally supported at the base end on a bracket B5 protruding horizontally from the machine base 9 and constantly biases the cam follower 46A at the intermediate portion to the cam 47 by a spring 48. And the pair of links 4
5, 45 are pivotally supported at one point on the free end side.
The spring 48 is stretched between a tip of a bracket B6 protruding horizontally from the machine base 9 and a tip of the swing bar 46 so as to rotatably support the cam 47. Rotating cam 4
Reference numeral 7 denotes a projecting portion 47A for closing the horizontal seal bars 4, 4 'and a retracting portion 47B for opening and a transition portion 4 between them so as to perform an operation in harmony with the pair of vertical seal bars 3, 3'.
7C.

A pair of heat sealing seal bars 42A, 42B
Is pivotally supported between a pair of upper and lower brackets 51A and 51B integrally attached to the elevating table 51 so as to be openable and closable, and rotatably supports rollers RA and RB on the outside of the base end. A pair of open / close swing levers 44A and 44B are provided with the above-mentioned rollers RA and RB at the front.
The sockets SA and SB for accommodating the seal bars 42A and 42B are formed vertically long over the entire vertical stroke L.
The opening / closing force is smoothly transmitted while allowing the ascending and descending. The elevating table 51 is moved up and down through a rack G3 by a pinion G2 with an output shaft of a reversible rotary servomotor M2 installed on the machine 9 along a vertical guide 52 such as a linear way vertically mounted on the machine 9. It is to be moved. The rack G3 is vertically attached to the bases of the pair of upper and lower brackets 51A and 51B, and is slidably engaged with the vertical guide 52.
Is also installed.

The driving force for opening and closing the horizontal seal bars 4, 4 'is reached from the vertical axis X2 shared with the vertical seal bars 3, 3', and drives the cam 47 fixed to the shaft X2 to rotate. The cam follower 46 is attached to the recess 47B of the cam 47.
When A is in contact, as shown in FIG.
Is pivoted backward to open and close a pair of open / close swing levers 44A, 44B.
Are rocked in the opening direction via the links 45, 45 to open the heat-sealing seal bars 42A, 42B. When the cam 47 rotates and the cam follower 46A comes into contact with the transition portion 47C, the swing bar 46 is returned to the neutral position, and the pair of open / close swing levers 44A, 44B is set to the horizontal seal start state via the links 45, 45. The seal bars 42A and 42B are brought into contact with each other. When the cam 47 further rotates and the cam follower 46A comes into contact with the protruding portion 47A, the swing bar 46 is swung forward and the open / close swing levers 44A and 44B are linked.
By swinging in the closing direction via 5, 45, the seal bar 42
A and 42B are closed. At this time, the seal bar 42B
Also, a spring is used to abut against the seal bar 42A, so that the lateral seal is reliably performed.

As shown in FIGS. 6 to 8, the perforation blade 7 for perforating or cutting the horizontal seal portion of the packaging film F 2 is provided with the horizontal center groove 4 of one of the horizontal seal bars 4.
A pair of upper and lower parallel links 71 and 72 is swingably mounted in A such that a substantially saw-tooth-shaped blade edge 7A can move obliquely forward and in parallel across the sealing surface of the seal bar 4. At the upper part of the downward movement stroke L in the closed state of the horizontal seal bars 4, 4 ', the outer parallel link 71
The rotator 73 of the cam follower attached to the abutment comes into contact with the position-adjustable cam 8 mounted on the machine base 9 side so as to extend in parallel beyond the sealing surface and the horizontal center groove 4A 'of the other horizontal seal bar 4'. When the cam lift is reduced (see FIG. 8).
(A cam position is indicated by a broken line C1), and the horizontal seal portion is perforated at a time, and when the cam lift is increased (a solid line C2 indicates a cam position in FIG. 8), cutting is performed at the horizontal seal portion. ing. The perforated blade 7 is shown in FIG.
(A) is urged by a spring S so as to fit into the horizontal center groove 4A of the horizontal seal bar 4.

As shown in FIG. 8, the cam position changing device 80 for changing the lift of the cam 8
The number of perforations and cutting are remotely controlled in accordance with a predetermined program by the operation of the rotary drive means 82 of the rotary solenoid mounted on the support plate 81 which is opened and closed by the operation of the cam lift C2 shown in the illustrated position. The change to the small cam lift C1 is performed by changing the swing link 84 connected to the output pin 83 of the turning drive means 82 to the arrow Y1.
This is performed by moving the cam 8 mounted on (supported by the pin 85) in the cam lift decreasing direction. The degree of insertion of the perforation m is adjusted by moving the adjustment screw 87 from the bracket 86 fixed to the support plate 81 to the swing link 8.
4 by adjusting the turning direction position. That is, when the adjusting screw 87 is pushed in, the cam lift becomes small and the perforation becomes shallow, and when the adjusting screw 87 is extended, the cam lift becomes large and the deep perforation, and can be selected according to the packaging film material and the like.

According to FIGS. 9 to 11, a particularly elastically supported heat-sealed seal bar 42B of the transverse seal bars 4, 4 'is shown.
The operation during the horizontal seal closing operation will be described. One heat-sealing seal bar 42 </ b> A is
But the other elastic support seal bar 42B
Is hollow, is covered so as to cover the other open / close bar 42, and is connected via a pair of front and rear springs 42C, 42C. That is, the other opening / closing bar 42
The bolt 42 passes through a hole in the upper surface of the other seal bar 42B.
D and 42D are screwed together, and a compression spring 42C is provided between the head of the bolt 42D and the upper surface of the seal bar 42B.
Is interposed. Therefore, in the free state, as shown in FIG. 9, the seal bar 42B is pushed out to the one seal bar 42A side by the spring 42C against the open / close bar 42, and when the open / close bars 42, 42 are closed, the base is closed. The basic structure is to abut sequentially from the end to the tip and apply ironing. In order to generate a stronger ironing force, the push screw 42E at the distal end was pushed in to separate the seal bar 42B from the open / close bar 42 at the upper end of the distal end as shown in the drawing, and the proximal end was pushed out to one seal bar 42A side. It is in an inclined state. The push screw 42E is locked by a lock nut 42N so that the position can be adjusted. As guides, open / close bars 42 are provided at four points on the top and bottom of the upper and lower surfaces.
And a long hole of the seal bar 42B that engages with the pin.

In the open state shown in FIG. 9, the seal bar 42B
Is in an inclined state in which the base end side is pushed out to the one seal bar 42A side, and as the opening and closing bars 42, 42 close, as shown in FIG. It comes into contact with the seal bar 42A and starts sinking, starts to press strongly from the base end side, and irons the front end side,
If the packaging film F1 has wrinkles, it is moved to the front end side. After closing, the seal bar 4 is compressed by the force of the compression spring 42C.
2B is pressed against one seal bar 42A, and a uniform horizontal sealing pressure is applied to the whole.

An outline of the operation of the vertical automatic packaging machine 1 is as follows.
The horizontal sealing bars 4, 4 'start horizontal sealing at the horizontal sealing position L1 with the bottomed tubular packaging film F1 interposed therebetween. At this time, when the opening and closing bars 42, 42 are closed, the heat welding seal bar 42B is closed.
A comes in contact with A sequentially from the base end to the tip,
Squeeze and seal horizontally without biting wrinkles. After the closing, the horizontal seal bars 4, 4 'are returned to the return position L2 slightly upstream to inflate the tubular packaging film F1 in the bottomed state, and then, while horizontally sealing, one bag from the horizontal seal position L1. The film F is moved downward while pulling the packaging film F1 over the length to supply the film F in the longitudinal direction. In the upper part of the machining process L,
The perforation blade 7 perforates or cuts the place where the horizontal seal bars 4, 4 'sandwich the horizontal seal according to the lift of the cam 8. After the horizontal seal is completed at the bottom dead center position L3, the horizontal seal bars 4, 4 'are opened and moved upward to the horizontal seal position L1, and the vertical seal bars 3, 4' are moved upward.
3 'is closed during the upward movement of the horizontal seal bars 4, 4' to perform vertical sealing, but is open during the return movement and the downward movement. By returning the horizontal seal bars 4, 4 'to the slightly upstream side, the bottomed tubular packaging film F1 is inflated, and filling of the packaged material is promoted by the swollen portion.

[0030]

As is apparent from the above description, according to the seal bar type vertical automatic packaging machine according to the first aspect of the present invention, the pair of horizontal heat-sealing opening / closing seal bars are moved downward. In addition to performing intermittent transfer of the packaging film in the longitudinal direction, sufficient transverse sealing time can be taken to prevent insufficient sealing, and at the same time as this transverse sealing,
The cutting edge of the perforation blade mounted on one of the side heat welding opening / closing seal bars is moved obliquely forward over the seal surface via the cam follower attached to one of the perforation blade or the parallel link by downward movement. It is driven to move in the direction and parallel,
According to the position of the cam, that is, when the lift of the cam is reduced, the horizontal seal portion can be perforated, and when the lift of the cam is increased, the horizontal seal portion can be cut. Since the perforation blade is driven to move obliquely forward and parallel by the parallel link, sharpness is improved and uniform perforation can be performed. Furthermore, when a pair of horizontal heat welding opening / closing seal bars that move up and down are laterally sealed with an expanded packaging film, wrinkles are moved from the base end side to the front end side to eliminate the occurrence of sealing failure due to the wrinkle biting. Prevention means can be easily incorporated.

According to the seal bar type vertical automatic packaging machine of the second aspect, the cam is configured such that the lift amount is controlled by driving means such as a rotary solenoid.
Cam position control for perforation and cutting is very easily performed.

According to the third aspect of the present invention, the lift amount of the drive means such as a rotary solenoid is adjusted by the adjusting screw so that the degree of perforation is finely adjusted in the perforation operation. Due to the limitation, the degree of perforation can be finely adjusted according to the packaging film material.

According to the seal bar type vertical automatic packaging machine of the fourth aspect, the horizontal heat welding opening / closing seal bar is slightly upstream after starting the horizontal sealing with the tubular packaging film interposed at the horizontal sealing position. Because it is configured to be moved down after being returned and inflating the bottomed tubular packaging film, when the horizontal sealing starts, the tubular packaging film enters the bottomed state and receives the packaged object, By returning the horizontal heat welding opening / closing seal bar slightly upstream, the tubular packaging film expands and the packaged product is easily received, and the height of the packaged product inside is reduced and the next horizontal sealing is performed. It will be convenient.

According to the seal bar type vertical automatic packaging machine according to the fifth aspect, at least one of the horizontal heat welding open / close seal bars is an open / close bar that opens and closes around the base-side pivot shaft. On the other hand, a heat-sealing seal bar that abuts against the other one is elastically supported so as to reciprocate toward the other, and the elastically-supported heat-sealing seal bar is used when the horizontal sealing is started. And press-fitting from the base end side, and the pressure-welding is shifted to the distal end side according to the closing of the open / close bar, and the closing of the horizontal seal is completed in a state where it is pushed and sinks. , One of the above-mentioned heat-sealing seal bars is mounted so as to be able to advance and retreat in the horizontal center groove of the sealing surface of the other heat-sealing seal bar. At least one bar , A heat-sealing seal bar, which comes into contact with the other member in a horizontal seal with respect to an opening / closing bar that opens and closes around the base end pivot shaft, is elastically supported so as to reciprocate toward the other member. It is configured to complete the closing of the horizontal seal in the state of being pushed down by the seal bar and sunk, and it is raised before hitting the other heat welding seal bar,
In order to push and pinch the tubular packaging film between the closing start and the pressing side starting from the base side so as to sequentially approach the front side, a folding line is inserted from the base side which is sealed vertically and does not escape It is possible to eliminate the wrinkles in the middle toward the double folded portion on the front end side, and to prevent the occurrence of poor lateral sealing. If a perforation blade is mounted on one of the lateral heat welding opening and closing seal bars, it is possible to neatly perforate the horizontal seal portion without wrinkles and to perform a clean cutting.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a seal bar type vertical automatic packaging machine according to a typical embodiment of the present invention.

FIG. 2 is a plan view showing an open / close mechanism of an opening / closing mechanism of a vertical heat welding opening / closing seal bar of the vertical automatic packaging machine.

FIG. 3 is a side view showing a pair of horizontal heat welding opening / closing seal bars and an opening / closing / elevation driving device of the vertical automatic packaging machine.

FIG. 4 is a front view of the elevation drive device.

FIG. 5 is a plan view of the vertical automatic packaging machine in an open state showing an opening / closing mechanism of a horizontal heat welding opening / closing seal bar.

FIG. 6 is a plan view showing a state where the perforated blade of the vertical automatic packaging machine is mounted on a horizontal heat welding opening / closing seal bar.

FIG. 7 shows a state in which the perforation blade is mounted on one of the side heat welding opening / closing seal bars, where (a) is a plan view,
(B) is a side view.

FIG. 8 is a front view showing a configuration of a position adjustable cam of the vertical automatic packaging machine.

FIG. 9 is a plan view of the vertical automatic packaging machine in an open state for explaining a wrinkle preventing operation of the lateral heat welding opening / closing seal bar.

FIG. 10 is a plan view immediately before a closed state for explaining the wrinkle generation prevention operation.

FIG. 11 is a sectional view taken along the line XI-XI in FIG. 9;

FIG. 12 is a vertical sectional view of a conventional vertical automatic packaging machine.

FIG. 13 is an explanatory view of a horizontal sealing operation of a pair of horizontal heat welding rolls of the vertical automatic packaging machine. FIG. 13 (a) is a tube which has already been filled with materials and the like to be packaged between the maximum intervals of the rolls. FIG. 4B is a plan view showing that wrinkles are partially generated in the tubular film. FIG. 4B is a diagram illustrating a state in which the tubular film is squeezed by rotating a roll, and the vertical seal side is almost fixed. It is a top view showing that wrinkles are generated without being able to escape, and (c) is a front view in which the wrinkles are bitten linearly at once by a roll and laterally sealed.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 seal bar type vertical automatic packaging machine 2 forming chute 3, 3 ′ vertical heat welding opening / closing seal bar 4, horizontal heat welding opening / closing seal bar 4A horizontal center groove of sealing surface 7 perforation blade 8 position adjustable cam 71 Parallel link 72 Parallel link 82 Driving means (rotary solenoid) 87 Adjusting screw F Heat-sealing packaging film F1 Tubular packaging film L1 Horizontal sealing position L2 Return position to upstream side m Perforation

Claims (5)

(57) [Claims] 1. A long heat-sealing packaging film which is intermittently fed in a longitudinal direction is guided to a forming chute and folded in two along the longitudinal direction so that both side edges are joined to each other. Vertical sealing is performed over a length of one bag or more by the vertical heat sealing opening / closing seal bar to obtain a tubular packaging film, and the tubular packaging film is placed in a horizontal sealing position on the downstream side of the vertical heat sealing opening / closing seal bar. It is placed between a pair of horizontal heat welding opening and closing seal bars that are arranged and opened and closed around the base side pivot shaft, and are laterally sealed to a bottomed state, and the article to be packaged in this tubular packaging film passes through the above forming chute. The horizontal heat welding opening and closing seal bar moves downward while holding the packaging film while the vertical heat welding opening and closing seal bar is open, and pulls it down, and feeds the packaging film in the longitudinal direction, The While the horizontal heat welding opening / closing seal bar is opened and ascending to the horizontal sealing position, the vertical heat welding opening / closing seal bar is vertically sealed, and the next horizontal seal seals the packaging film to produce a packaged product. Along with
In a seal bar type vertical automatic packaging machine that perforates or cuts the horizontal sealing portion of the packaging film by operating a perforation blade incorporated in the horizontal heat welding opening / closing seal bar, Is mounted on one of the pair of lateral heat welding open / close seal bars so as to be swingable by a pair of parallel links so that the cutting edge moves obliquely forward and parallel beyond the seal surface of the seal bar. In the above-mentioned downward movement in the closed state of the pair of horizontal heat welding opening / closing seal bars, the position where the cam follower attached to one of the perforated cutting blade or the parallel link is mounted on the machine base is adjustable. When the lift of the cam is reduced, the horizontal seal is perforated when the lift of the cam is reduced, and the lift of the cam is increased. Seal bar-type vertical-type automatic packaging machine which is characterized in that the cutting of the lateral sealed portion when. 2. The seal bar type vertical automatic packaging machine according to claim 1, wherein the lift amount of the cam is controlled by driving means such as a rotary solenoid. 3. The seal bar type vertical automatic machine according to claim 2, wherein the lift amount of the drive means such as the rotary solenoid is limited by an adjusting screw so that the degree of perforation is finely adjusted in the perforation operation. Packaging machine. 4. The horizontal heat welding opening / closing seal bar is slightly returned to the upstream side after starting horizontal sealing with the tubular packaging film interposed at the horizontal sealing position to inflate the bottomed tubular packaging film. The seal bar type vertical automatic packaging machine according to claim 1, wherein the automatic packaging machine is moved downwardly. 5. A heat-sealing seal bar in which at least one of the side heat-sealing opening / closing seal bars is in contact with the other side of the opening-closing bar that opens and closes around the base-side pivot shaft. Are elastically supported so as to be able to reciprocate toward the other, and the heat-sealed seal bar elastically supported includes:
At the start of the horizontal seal, pressure contact is started from the base end side with the other heat-sealing seal bar, the pressure contact is shifted to the distal end side as the opening / closing bar closes, and the closing of the horizontal seal is completed in the pressed and sunk state. The perforated blade is configured to be able to advance and retreat within the lateral center groove of the sealing surface of one of the heat-sealing seal bars and into the lateral center groove of the sealing surface of the other heat-sealing seal bar. The seal bar type vertical automatic packaging machine according to claim 1, which is mounted.