JPH1179113A - Seal bar type vertical automatic packaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the manufacturing cost and the maintenance cost without degrading the productivity below the conventional one even when a packaging film is intermittently fed, and the sealing in the vertical direction and the horizontal direction is achieved when the film is stropped, to eliminate the vertical movement of horizontal and vertical seal bars, to eliminate the deflection load of a heater power feeder cable, to increase the length by one bag, to shorten the drop distance in starting the filling by dividing the filling, and to improve the efficiency of the filling work. SOLUTION: A long packaging film F is intermittently and vertically fed by a rotational feed roller 20 in two lots, the film is folded into two by a forming chute S, each side edge part is aligned when the film is stopped, and vertically sealed by a vertical seal bar 10 in two lots to form a tube, and held by a horizontal seal bar 30 on the downstream side when the film is stopped, and horizontally sealed for each bag in a bottomed condition, the content to be packaged is filled by a filling means 40 through a forming chute, and sealed by the next horizontal seal to manufacture a packaged product F2. The vertical seal bar 10 is slightly longer than one bag length.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a long heat-sealing packaging film supplied by a rotating roller in a longitudinal direction, guided to a forming chute, folded in two along the longitudinal direction, and joined at both side edges. 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 to obtain a tubular packaging film, and the tubular packaging film is downstream of the vertical heat welding opening and closing seal bar. A pair of horizontal heat welding opening and closing seal bars arranged at the side horizontal sealing position and horizontal sealing is performed for each bag to make it a bottomed state, and the object to be packaged in this tubular packaging film passes through the forming chute. The present invention relates to a seal bar type vertical automatic packaging machine which manufactures a packaged product after filling and filling with the next horizontal seal.

[0002]

2. Description of the Related Art As a seal bar type vertical automatic packaging machine,
Some are shown in FIGS. 7 and 8. For example, a schematic configuration of a seal bar type vertical automatic packaging machine 100 used for packaging various instant noodle drying materials is such that a packaging film is guided from a reel to a vertical forming chute via a tension means to extend the packaging film. The package film F is folded in two along the direction, and then, the two side edges of the folded package film F are combined, and then the two side edges are sandwiched by a pair of vertically long heat-sealing opening / closing seal bars (hereinafter referred to as vertical seal bars) 110. While moving downward, vertical sealing is performed over a length of one bag or more to form a tubular packaging film F2. The tubular packaging film F2 is disposed at the horizontal sealing start position H1 on the downstream side of the vertical seal bar 110. A pair of horizontal heat-sealing opening / closing seal bars (hereinafter referred to as horizontal seal bars) 120 are horizontally sealed for each bag to form a bottomed state. So that the go manufactures packages F3 sealed by the next transverse seal while filling the object to be packaged within. The cutting means is also appropriately mounted similarly to the conventional one.

[0003] More specifically, the vertical seal bar 1
10 and the horizontal seal bar 120 are １ ／ of the length of one bag.
A gear 133 that reciprocates and a rack 131 that is moved up and down by the vertical moving means 130 over a distance of
At the same time, the horizontal seal bar 120 is moved and driven in opposite directions by the opening and closing means 132 and simultaneously opened and closed in the opposite direction by the opening and closing means, as shown in FIG. When the horizontal sealing is started with the bottomed tubular packaging film F2 sandwiched therebetween, the vertical seal bar 110 is moved to the vertical seal end position V2 immediately above the horizontal seal start position H1 by the opening / closing means. When the horizontal seal bar 120 is horizontally sealed by the vertical moving means 130 as shown in FIG. 8B, the horizontal seal bar 120 is opened and the vertical seal is completed. / 2 is moved downward while pulling the packaging film F2 to the horizontal sealing end position H2 at a distance of / 2 to supply the packaging film in the longitudinal direction and to use the vertical seal bar. 10 is moved upward in the open state from the vertical seal end position V2 to the vertical seal start position V1 at a distance of 1/2 of the length of one bag, and then opened and closed as shown in FIG. 8 (c). The horizontal seal bar 120 is opened at the horizontal seal end position H2 reached by the downward movement to finish the horizontal seal, and the vertical seal bar 110 is closed at the vertical seal start position V1 reached by the upward movement to remove the tubular packaging film F2. Start vertical sealing by pinching, then
As shown in (d), the horizontal seal bar 120 is moved upward from the horizontal seal end position H1 to the horizontal seal start position H1 in the upstream direction by the vertical moving means 130 while being opened, and the vertical seal bar 110 is vertically sealed while being vertically sealed. The packaging film F2 is moved downward while pulling the packaging film F2 from the seal start position V1 to the vertical seal end position V2 to continuously supply the packaging film in the longitudinal direction, and the above operation is repeated during operation.

The vertical seal bar 110 is substantially bilaterally symmetrical with respect to the tubular packaging film F2 interposed therebetween, and has an electric heater (not shown) at a vertically long end portion having a length of one bag or more. And an opening / closing lever for the opening / closing lever. The opening / closing lever is urged in the closing direction by a spring and can be opened / closed in an X-shape connected by a pin at the center of the intersection. Combined between upper and lower brackets. The electric heater is connected to a loosened power supply line (not shown). Horizontal seal bar 12
0 is substantially symmetrical with respect to the tubular packaging film F2 sandwiched therebetween, and is provided with a seal bar 12 in which the electric heater 121 is horizontally inserted substantially over the entire length near the opposed facing surfaces.
2 and their opening / closing levers. The opening / closing lever is connected with a pin at the base end in a V-shape, and is opened and closed between upper and lower brackets. Electric heater 1
21 is also connected to a loosened power supply line (not shown). These vertical and horizontal seal bars 110, 120
Is held movably up and down along a vertical rail via a guide shoe projected horizontally from the rear of the bracket.

[0005]

In the conventional vertical automatic packaging machine 100 as described above, the vertical seal by the vertical seal bar 110 and the horizontal seal by the horizontal seal bar 120 are alternately performed almost continuously. Higher speed can be achieved by moving the packaging film in the longitudinal direction, and productivity can be greatly improved. Heating power is supplied by sharing the vertical movement stroke of each vertical / horizontal seal bar to almost half the length of one bag. The vertical load of the horizontal seal bar and the vertical seal bar can also be reduced by connecting to the vertical moving means so as to balance the weight by using the operation in the opposite direction. , Has been very popular. However, vertical seal bar 11
0 and the horizontal seal bar 120 require a structure that can be moved up and down by the vertical moving means 130 together with their opening and closing means, and the overall structure is complicated and the manufacturing and maintenance costs are increased. There is. The vertical movement stroke is also approximately half the length of one bag, but increasing the production speed increases the radial load on the heater power supply line.

The present invention has been proposed in view of the above points, and has as its object to intermittently feed a heat-sealing packaging film vertically and perform vertical sealing and horizontal sealing when the film is stopped. However, compared to conventional seal bar type vertical automatic packaging machines, manufacturing and maintenance costs can be reduced without reducing productivity, and heater power is eliminated by eliminating the vertical movement of the horizontal seal bar and vertical seal bar. Eliminating the radial load on the supply line, making it easy to increase the length of one bag, and also dividing the filling of the packaged material to reduce the falling distance during filling, making filling work more efficient Provide a seal bar type vertical automatic packaging machine that can be implemented.

[0007]

In order to achieve the above object, a seal bar type vertical automatic packaging machine according to the first aspect of the present invention comprises a long heat-sealing packaging film supplied in a longitudinal direction. Guided to the forming chute, folded in two along the longitudinal direction, and fitted to both side edges, and the both side edges are vertically sealed by being opened and closed by the operation of the opening and closing means by a pair of vertically long vertical heat welding opening and closing seal bars. A film, and the tubular packaging film is sandwiched by a pair of horizontal heat welding opening / closing seal bars disposed at a horizontal sealing position on the downstream side of the vertical heat welding opening / closing seal bar by the operation of the opening / closing means, and the horizontal sealing is performed every bag. And filling the tubular packaging film into the tubular packaging film through the forming chute by the filling means, and then sealing it with the next horizontal seal to produce a packaged product. Oite, longitudinal feed of the heat-fusible packaging film twice by rotating the feed roller or 3
The operation of the rotation drive means is intermittently performed, and the closing operation of the opening and closing means of the vertical heat welding opening and closing seal bar is performed two or three times while the rotation feed roller is stopped two or three times. The length of the vertical heat-sealing opening / closing seal bar is set corresponding to slightly longer than 1/2 or slightly longer than 1/3 of the length of one bag. It is characterized by having.

Therefore, the vertical heat welding opening / closing seal bar 2
Conventional or automatic packaging, in which the vertical sealing and the horizontal sealing by the horizontal heat welding opening / closing seal bar are performed with the heat-sealing packaging film stopped, and the sealing work is performed while moving vertically. Although the productivity is deteriorated by the time required for the sealing operation compared to the machine, the rotation speed of the rotary feed roller can be greatly increased because it only needs to perform vertical feeding. Can be heated to the film even during vertical feeding by making the gap of the packaging film about the thickness of two stacked layers and the minimum gap that flows smoothly, so offsetting the long working time by the sealing work in the stopped state And the productivity is not deteriorated. In this way, while maintaining the productivity as before, the vertical feed operation is performed on the rollers, and the vertical and horizontal sealing operations are performed on the fixed vertical and horizontal heat-sealing opening and closing seal bars, respectively. Since the functions are shared as if they were performed, the structure is simplified, the manufacturing and maintenance costs are reduced, and the vertical movement of the heater power supply lines is eliminated, thereby eliminating the radial load. In addition, the length of one bag can be easily increased by dividing the vertical seal into two or three times without using a long vertical heat welding opening / closing seal bar. While shortening the fall distance and preventing damage to the product,
Further, the filling of the packaged object can be divided, and the filling can be performed smoothly and the efficiency can be improved while shortening the falling distance at the time of filling to prevent damage to the product.

[0009] As described in claim 2, the filling of the object to be packaged by the filling means is performed twice or three times during the closing operation of the opening / closing means of the vertical heat-sealing opening / closing seal bar. Efficiency can be improved by dividing the filling, dispensing and smoothing, and the drop distance during filling can be shortened to prevent damage to the product.

According to a third aspect of the present invention, the rotary feed roller is disposed upstream of the horizontal heat welding opening / closing seal bar, and slightly inflates the bag by the rotation driving means during the sealing operation of the horizontal heat welding opening / closing seal bar. The heat-sealing packaging film formed into a cylindrical shape by being driven to rotate can be slightly crushed and slightly swelled, thereby facilitating the filling of the article to be packaged.

According to a fourth aspect of the present invention, the vertical heat-sealing opening / closing seal bar has a thickness of about two sheets of the heat-sealing wrapping film and a minimum gap which flows smoothly by the opening / closing means when opened. It is opened, and the opening and closing time of the vertical heat welding opening and closing seal bar can be shortened, and the vertical sealing work speed can be increased. Also, when the vertical seal is open, the vertical seal portion of the packaging film that passes through a small gap can be preheated while vertically feeding the heat-welding packaging film by the rotary feed roller. Further, the heat radiation loss from the vertical heat welding opening / closing seal bar can be reduced.

According to a fifth aspect of the present invention, the vertical heat sealing opening / closing seal bar is moved manually or by a cylinder so as to be out of the moving path of the heat welding packaging film while the vertical automatic packaging machine is stopped. Also, when the vertical automatic packaging machine is stopped for a relatively long time during lunch break, etc., the seal bars are deviated from the working position, and the stopped heat-sealing packaging film is melted by the heat from the seal bar. Can be easily prevented. In addition, the seal bar can be immediately returned to the work position at the start of the work.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a seal bar type vertical automatic packaging machine according to the present invention. FIG. 1 is a front view of a seal bar type vertical automatic packaging machine according to a typical embodiment of the present invention, FIG. 2 is a vertical sectional side view of the vertical automatic packaging machine, and FIG. FIG. 4 is a perspective view schematically showing a heat-sealing opening / closing seal bar and horizontal opening and closing means thereof, FIG. 4 is a block diagram of operation control of a rotary feed roller of the vertical automatic packaging machine, and FIG. FIG. 6 is an operation timing diagram of the vertical and horizontal heat-sealing opening / closing seal bars and the rotary feed roller of the machine. FIG. 6 is a schematic perspective view illustrating the retreating movement of the vertical heat-sealing opening / closing seal bar of the vertical automatic packaging machine.
Shows a vertical seal end state, (b) shows a retreat start state, and (c) shows a retreat end state.

In FIGS. 1 to 6, various kinds of instant noodle drying materials are used for packaging.
The schematic configuration of the seal bar type vertical automatic wrapping machine 1 which intermittently feeds the film will be described. As in the conventional case, the packaging film F is transferred from the reel R via the tension means T to the vertical forming chute S. And fold it in two along the longitudinal direction. Next, the folded packaging film F
After the both side edges are aligned, the both side edges are sandwiched between a pair of vertically long vertical heat sealing opening / closing seal bars (hereinafter referred to as vertical seal bars) 10 and vertically sealed over a length slightly longer than 1/2 bag. To form a tubular packaging film F2. The tubular packaging film F2 is fed over a length of 1/2 bag by a pair of rotary feed rollers 20 sandwiching both side edges, and the downstream side of the vertical seal bar 10. And a horizontal seal bar (hereinafter referred to as a horizontal seal bar) 30 disposed at the horizontal seal position, and horizontally sealed for each bag, and at the same time, slightly longer than the remaining 1/2 bag. Over and vertically sealed by the vertical seal bar 10 to make a bottomed state,
This tubular packaging film F2 is filled with an article to be packaged and sealed by the next horizontal seal to produce a packaged product F3. The cutting means is also appropriately mounted similarly to the conventional one, and is separated at the horizontal seal portion.

More specifically, in the front part of the automatic packaging machine 1, a vertical length slightly longer than a half bag in a substantially vertical direction adjacent to each other sequentially below a vertically mounted forming chute S. A seal bar 10, a rotary feed roller 20,
The horizontal seal bars 30 are arranged, and the vertical opening / closing means 15 as their operating means, the rotation driving means 25, and the horizontal opening / closing means 35 are arranged behind them. The weighing plate 41 of the filling means 40 and the chute 42 for guiding the weighed articles to the lower part of the forming chute S are arranged behind the forming chute S.

The vertical seal bar 10 is substantially bilaterally symmetric with respect to the tubular packaging film F2 sandwiched therebetween, and
It comprises a seal bar 12 in which an electric heater (not shown) is vertically penetrated at a vertically elongated tip portion slightly longer than the bag, and opening and closing levers 16 thereof. The opening / closing levers 16, 16 are driven to open and close via cam followers 19, 19 by engaging with a cam 18 attached to the vertical rotary drive shaft 5. The cam 18 has two projecting portions (leaf portions) for intermittently operating the vertical seal bar 10 twice during 1/2 rotation of the rotary drive shaft 5 to seal one bag at the timing shown in FIG. Have

The degree of opening of the seal bars 12, 12 is set to be approximately the thickness of two wrapping films and a minimum gap that flows smoothly, so that the opening and closing time of the seal bars can be shortened and the vertical sealing work speed can be reduced. Hastened,
While the vertical seal is open, the vertical seal portion of the packaging film F2 can be preheated through the small gap while the packaging film F2 is vertically fed by the roller 20. Further, heat radiation loss from the vertical seal bar 10 can be reduced. As shown in FIG. 6, the vertical seal bar 10 is moved to the cam 18 together with the opening / closing means 15 by a cylinder or the like so as to be off the movement path of the packaging film F2 while the vertical automatic packaging machine 1 is stopped. Is done. that time,
The cam followers 19, 19 can move along guide plates 19A, 19A provided above the cam 18. When the vertical automatic packaging machine 1 is stopped for a relatively long time during lunch break or the like, the seal bars 12, 12
Of the packaging film F2 which has been deviated from the working position and stopped.
Is prevented from being melted by heat. Further, at the start of the operation, the seal bars 12, 12 can be immediately returned to the operation position.

The rotary feed roller 20 is composed of a pair of discs 22 and 22 which are in contact with each other and have fine anti-slip serrations on the peripheral surface, and are driven by a variable speed servo motor 25 of independent rotary drive means. The packaging film F2 is rotationally driven so as to be fed from top to bottom. Vertical and horizontal seal bars 10 and 30 that open and close at a fixed timing
When the packaging film F2 is fed at a high speed, a long bag is formed, and when the packaging film F2 is fed at a low speed, a short bag is formed. As shown in FIG. 4, the setting of the bag length is digitally input through the operation panel 29, and the controller 28 and the servo driver 2 are set.
7, the speed of the servo motor 25 is controlled. The roller 20 is provided with the horizontal seal bar 3.
During the sealing operation of No. 0, the bag is slightly rotated to inflate the bag, and the packing film F2 formed into a cylindrical shape is slightly crushed and slightly expanded so that the packaged object can be easily filled.

The horizontal seal bar 30 is also substantially bilaterally symmetric with respect to the tubular packaging film F2 sandwiched therebetween, protrudes horizontally, and has an electric heater 31 horizontally penetrated over substantially the entire length near the opposed facing surfaces. It comprises a seal bar 32 and opening and closing levers 36, 36 thereof. The opening / closing levers 36, 36 are driven to open and close via cam followers 39, 39 by engaging with a cam 38 attached to the vertical rotary drive shaft 5. The cam 38 has a pair of protruding portions (leaf portions) for actuating the horizontal seal bar 30 once during a half rotation of the rotary drive shaft 5 for sealing one bag at the timing shown in FIG. ing. The electric heater 31 is connected to a power supply line (not shown). This horizontal seal bar 3
2, a perforation blade and a cutting blade are appropriately incorporated.
In addition, in order to prevent wrinkles from occurring in the sealing portion when the horizontal sealing is performed, the applicant of the present invention disclosed in September 1996 that the packaging film F2 was tightly sealed from both side edges to the folded portion. Lateral seal bar 32 having the structure described in the specification and drawings of Japanese Patent Application No. 8-234959 filed on May 5.
Has been adopted.

The rotational force of the rotary drive shaft 5 is transmitted from the motor M1 on the machine base 2 of the vertical automatic packaging machine 1 to the main shaft 3 via the chain C1 and the sprocket wheel W1, and then transmitted via the bevel gear G. Power is transmitted from the main shaft 3 to the rotary drive shaft 5. From the main shaft 3, the rotational force of the weighing plate 41 of the filling means 40 is further transmitted to the drive shaft 4 via the chain C2 and the sprocket wheel W2. The main shaft 3 includes a vertical seal bar 10, a feed roller 20, and a horizontal seal bar 30.
K1, K2, K3 for transmitting a pulse for controlling the operation timing of the controller 28 to the controller 28 and the transmitters T1, T
2, T3 is mounted.

Next, the operation of the seal bar type vertical automatic packaging machine 1 will be outlined with reference to FIG. 5. First, the packaging film F2 which has been initially vertically sealed and fed into a cylindrical shape is horizontally sealed by the horizontal seal bar 30. And vertical seal bar 10
After the vertical seal bar 10 is first opened while the horizontal sealing is being continued, the rotary feed roller 20 is slightly rotated to inflate the bag, and the cylindrical packaging film F2 is slightly crushed and expanded. From 40, the package is filled. After the end of the horizontal sealing, the rotary feed roller 20 is rapidly rotated to feed the packaging film F2, and is moved after a length corresponding to a half bag, and then stopped. Therefore, the packaging film F2 is vertically sealed a second time or more by the vertical seal bar 10 over a length of 袋 bag, and the second filling is performed at the same time. After this vertical sealing, the roller 20 is rapidly rotated for the second time, and the packaging film F2 is moved by a length of １ ／ bag. Therefore, the next horizontal seal is performed as described above, one bag is completed, and the above operation is repeated to obtain a predetermined number of packaged products F.
3 will be manufactured. The seal bar type vertical automatic wrapping machine 1 of the above embodiment performs the feeding of the wrapping film and the vertical sealing in two separate times, but the number is reduced to three times by inputting to the operation panel 29 and changing the shape of the cam 18. It is also possible to perform separate feeding and vertical sealing. The filling may be performed according to the number of divisions, or may be always performed once.

[0022]

As is apparent from the above description, according to the seal bar type vertical automatic packaging machine of the first aspect of the present invention, the heat-sealing packaging film is supplied in the longitudinal direction by the rotary feed roller. It is performed intermittently by the operation of the rotation drive means once or three times, and the closing operation of the opening and closing means of the vertical heat welding opening and closing seal bar is performed twice during the stop of the rotation feed roller twice or three times. Alternatively, the length of the vertical heat-sealing open / close seal bar is slightly longer than 1/2 of the length of one bag or slightly longer than 1/3. Therefore, the vertical seal divided into two or three times by the vertical heat sealing opening / closing seal bar and the horizontal sealing by the horizontal heat sealing opening / closing seal bar are performed with the heat-sealing packaging film stopped. , While performing the sealing work while moving It becomes of that deteriorating only productivity time required for the sealing operation as compared to the automatic packaging machine,
The rotation speed of the rotary feed roller can be greatly increased because it only needs to be vertical feed, especially the gap between the vertical seal bars is set to the minimum thickness that is approximately the thickness of two packaging films and flows smoothly. As a result, the film can be heated even during vertical feeding, so that a longer working time can be offset by the sealing work in the stopped state, and the productivity does not deteriorate. In this way, while maintaining the productivity as before, the vertical feed operation is performed on the rollers, and the vertical and horizontal sealing operations are performed on the fixed vertical and horizontal heat-sealing opening and closing seal bars, respectively. Since the functions are shared as if they were performed, the structure is simplified, the manufacturing and maintenance costs are reduced, and the vertical movement of the heater power supply lines is eliminated, thereby eliminating the radial load. Also,
Even if a long vertical heat welding opening / closing seal bar is not used, the length can be easily increased by one bag by dividing the vertical seal into two or three times. While reducing the falling distance and preventing damage to the product, the filling of the packaged product can also be divided, and the filling distance can be shortened to prevent damage to the product, and the filling can be done smoothly and efficiency Can be

According to the seal bar type vertical automatic packaging machine of the second aspect, the filling of the object to be packaged by the filling means is performed twice or three times by the closing operation of the opening / closing means of the vertical heat welding opening / closing seal bar. Since the filling is performed during the filling, the efficiency can be increased by dividing the filling of the article to be packaged, dispensing it, and smoothly performing the filling, shortening the falling distance at the time of filling, and preventing damage to the product.

According to the seal bar type vertical automatic packaging machine according to the third aspect, the rotary feed roller is disposed on the upstream side of the horizontal heat welding opening / closing seal bar, and during the sealing operation of the horizontal heat welding opening / closing seal bar. Since the bag is slightly rotated by expanding the bag by the rotation driving means, the heat-sealing packaging film formed into a cylindrical shape can be slightly crushed and slightly expanded, and the packing material can be easily filled. become able to.

According to the seal bar type vertical automatic packaging machine according to the fourth aspect, the vertical heat-sealing opening / closing seal bar is opened and closed by the opening / closing means and has a thickness of approximately two sheets of heat-sealing packaging film and is smooth. The opening and closing time of the vertical heat welding opening / closing seal bar can be shortened, and the vertical sealing work speed can be increased. Also, while the vertical seal is open, the vertical seal portion of the packaging film passing through the small gap can be preheated while the heat-welding packaging film is vertically fed by the rotary feed roller. Further, the heat radiation loss from the vertical heat welding opening / closing seal bar can be reduced.

According to the seal bar type vertical automatic packaging machine of the fifth aspect, the vertical heat welding opening / closing seal bar is off the moving path of the heat-sealing packaging film while the vertical automatic packaging machine is stopped. As described above, when the vertical automatic packaging machine is stopped for a relatively long time at a lunch break or the like to be moved or returned by a manual operation or a cylinder, the seal bars are deviated from the working position, and the heat that has been stopped is stopped. It is possible to easily prevent the adhesive packaging film from being melted by the heat from the seal bar. In addition, the seal bar can be immediately returned to the work position at the start of the work.

[Brief description of the drawings]

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

FIG. 2 is a vertical sectional side view of the vertical automatic packaging machine.

FIG. 3 is a perspective view schematically showing vertical and horizontal heat-sealing opening / closing seal bars of the vertical automatic packaging machine and their opening / closing means.

FIG. 4 is a block diagram of operation control of a rotary feed roller of the vertical automatic packaging machine.

FIG. 5 is an operation timing diagram of a vertical and horizontal heat welding opening / closing seal bar and a rotary feed roller of the vertical automatic packaging machine.

FIGS. 6A and 6B are schematic perspective views for explaining retreating movement of the vertical heat welding opening / closing seal bar of the vertical automatic packaging machine, wherein FIG. 6A shows a vertical seal ending state, FIG. c) shows the retreat end state.

FIG. 7 is a front view of a conventional vertical automatic packaging machine.

FIG. 8 is a schematic perspective view for explaining the operation of the vertical and horizontal heat-sealing opening / closing seal bars of the conventional vertical automatic packaging machine, wherein (a) shows the state immediately after the end of the vertical seal and immediately after the start of the horizontal seal;
(B) shows the upward movement in the open state of the vertical heat welding opening / closing seal bar and the downward movement of the horizontal heat welding opening / closing seal bar in the closed state while performing horizontal sealing. (D) shows a state in which the vertical heat welding opening / closing seal bar is closed while the vertical heat sealing opening / closing seal bar is closed and the horizontal heat welding opening / closing seal bar is open in a closed state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seal bar type vertical automatic packaging machine 5 Rotation drive shaft 10 Vertical heat welding opening / closing seal bar 15 Vertical opening / closing means 20 Rotary feed roller 25 Rotary driving means 30 Horizontal heat welding opening / closing seal bar 35 Horizontal opening / closing means 40 Filling means F Heat welding Packaging film F2 Tubular packaging film F3 Packaged product

Claims (5)

[Claims] 1. A long heat-sealing packaging film supplied in a longitudinal direction is guided to a forming chute, folded in two along the longitudinal direction, and both side edges are joined together. The tubular sealing film is vertically sealed by being opened and closed by the operation of the opening / closing means by the heat welding opening / closing seal bar, and the tubular packaging film is placed in a pair of horizontal seals disposed at the horizontal sealing positions on the downstream side of the vertical heat welding opening / closing seal bar. It is sandwiched by the operation of the opening and closing means by means of the heat welding opening and closing means, and is laterally sealed every one bag so as to have a bottomed state. The tubular packaging film is filled with the article to be packaged by the filling means via the inside of the forming chute. Then, in a seal bar type vertical automatic packaging machine which manufactures a packaged product by sealing with the horizontal seal, the longitudinal supply of the heat-sealing packaging film is performed by a rotary feed roller. The operation of the rotation drive means is performed intermittently twice or three times, and the closing operation of the opening and closing means of the vertical heat welding opening and closing seal bar is performed during the stop of the rotation feed roller twice or three times. The length of the vertical heat sealing seal bar is slightly longer than 1/2 or slightly longer than 1/3 of the length of one bag. A seal bar type vertical automatic packaging machine, which is set correspondingly. 2. The method of filling an article to be packaged by the filling means is as follows.
2. The vertical automatic packaging machine according to claim 1, wherein the operation is performed during the closing operation of the opening / closing means of the vertical heat welding opening / closing seal bar two or three times. 3. The rotary feed roller is disposed upstream of the horizontal heat welding opening / closing seal bar, and is rotated slightly by the rotation drive means during the sealing operation of the horizontal heat welding opening / closing seal bar, so that the bag is slightly rotated and inflated. The vertical automatic packaging machine according to claim 1, wherein 4. The vertical heat-sealing opening / closing seal bar is opened by the opening / closing means so as to have a thickness of about two sheets of the heat-welding packaging film and to allow a minimum gap to flow smoothly. Item 6. The vertical automatic packaging machine according to Item 1. 5. The vertical heat welding opening and closing seal bar is manually or cylinder-moved and returned so as to be out of the movement path of the heat-sealing packaging film while the vertical automatic packaging machine is stopped. 4. The vertical automatic packaging machine according to 4.