JPH09278008A - Seal bar type automatic vertical packaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To expand a bottomed tubular film with an apparatus in a simple structure on filling so that filling in as many quantity as possible can be made even though the matters for filling are bulky. SOLUTION: A seal bar type automatic vertical packaging machine 1 is such a one wherein a long heat-sealable packaging film F is led to a forming chute 2 and folded double in the longitudinal direction with edges on both sides thereof being put together, and the side edges are sealed vertically with a pair of opening/closing seal bars 3 for vertical heat sealing in a length more than the length of one bag, and thereby a tubular packaging film F1 is formed, then transverse sealing is made to form the bottom for one bag with a pair of opening/closing seal bars 4 for transverse heat sealing provided at the downstream side of the opening/closing seal bars 3 for vertical sealing, and the packaging film F1 is filled with matters to be packaged supplied through the chute 2 and a package is made with transverse sealing applied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a long heat-sealable packaging film supplied in the longitudinal direction to a forming chute and folded in two along the longitudinal direction so that both side edges are aligned with each other. By a pair of vertically elongated vertical heat-welding opening / closing seal bars to vertically seal one bag or more to obtain a tubular packaging film, and the tubular packaging film is provided with a horizontal sealing position on the downstream side of the opening / closing seal bar. It is sandwiched by a pair of horizontal heat-welding opening and closing seal bars arranged horizontally to seal each bag in a bottomed state, and the tubular packaging film is filled with the object to be packaged through the molding chute. On the other hand, the present invention relates to a vertical automatic packaging machine for producing a packaged product by sealing with the horizontal seal.

[0002]

2. Description of the Related Art As an automatic vertical packaging machine, there is one shown in FIG. In this, a material film F made of polyethylene, polyvinyl chloride or other thermoplastic resin is folded in two along the lengthwise direction by a bending tool (molding chute) 102 while moving in the lengthwise direction, and the folded edges are paired. The tubular film F is sandwiched between the vertical heat welding rolls 103 and 103 and longitudinally welded while continuously moving in the longitudinal direction.
No. 1 and a pair of horizontal rotating horizontal heat welding rolls 10 with the film F1 moving vertically downward at an interval of one bag.
4 and 104 are used to seal in the lateral direction, and a predetermined amount of a product to be packaged such as a drying tool material is intermittently supplied from the fixed quantity supply device 105 through the inside of the folding tool 102 through the intermediary receiver 106 to perform the next lateral sealing. I was carrying out hermetically sealed packaging.

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,
For example, the motor 104 is driven from the motor M1 via the gear power transmission means S1 and S2 in synchronization with the vertical heat welding rolls 103 and 103 in feed speed. Vertical heat welding roll 10
Reference numerals 3 and 103 denote motor M1 to gear power transmission means S1.
Is driven through. Reference numeral 107 is a motor M
A rotary cutter driven from 1 through the reduction gear power transmission means S3 separates each bag at the horizontal seal portion.

[0004]

However, in the conventional vertical automatic packaging machine as described above, a pair of rotating horizontal heat welding rolls 1 is used.
Nos. 04 and 104 are arranged horizontally, and when a large amount of bulky objects such as ingredients are put between them, the bulging of the tubular film F1 tends to be insufficient. The present invention has been proposed in view of the above points, and an object thereof is to swell a tubular film in a bottomed state with a simple configuration at the time of filling so that many bulky items can be filled. Is.

[0005]

In order to achieve the above-mentioned object, an automatic vertical packaging machine according to claim 1 of the present invention is provided with a longitudinal heat-sealable packaging film supplied in the longitudinal direction on a forming chute. Guide it and fold it in half along the longitudinal direction to match both side edges, and vertically seal the both side edges with a pair of vertically elongated vertical heat welding opening / closing seal bars for a length of one bag or more. A film is obtained, and the tubular packaging film is sandwiched between a pair of horizontal heat-welding open / close seal bars arranged at the horizontal seal position on the downstream side of the vertical heat-welding open / close seal bar, and horizontally sealed for each bag to have a bottom. In this state, the tube-shaped packaging film is filled with an object to be packaged through the molding chute and is sealed by the next horizontal seal to produce a packaged product. And the above-mentioned lateral heat welding The closed seal bar sandwiches the bottomed tubular wrapping film between them at the horizontal sealing position to start the horizontal sealing, and is returned slightly upstream to inflate the bottomed tubular wrapping film, and then the horizontal seal. While pulling the packaging film over the length of one bag from the lateral sealing position, the packaging film is moved downward in the downstream direction to supply the heat-welding packaging film in the longitudinal direction, and after completion of the lateral sealing, open the packaging film. While being moved upward to the horizontal seal position, the vertical heat welding opening / closing seal bar is closed during vertical movement of the horizontal heat welding opening / closing seal bar to perform vertical sealing,
It is characterized in that it is opened at least during the downward movement.

Therefore, the tubular packaging film vertically sealed by a pair of vertically long vertical heat welding opening / closing seal bars for a length of one bag or more is sandwiched between the pair of horizontal heat welding opening / closing seal bars at the horizontal sealing position. Then, the horizontal seal is started to enter the bottomed state, and then the horizontal heat-welding opening / closing seal bar is slightly returned to the upstream side to be inflated, and filling of the expanded package is promoted. In particular, the bottom part that tends to be narrowed by being sandwiched by the horizontal heat welding opening and closing seal bar is expanded,
Contributes to the promotion of filling. The horizontal heat-welding opening / closing seal bar is moved downward in the downstream direction to supply the heat-welding packaging film in the longitudinal direction, and is opened after completion of the horizontal seal at the bottom dead center to be moved upward to the horizontal seal position. Then, the vertical heat-welding opening / closing seal bar is vertically sealed during this ascending movement, and it is possible to take a movement without interference between the vertical heat-welding opening / closing seal bar and the horizontal heat-welding opening / closing seal bar, and a sufficient sealing time.

In the seal bar type vertical automatic packaging machine according to claim 2 of the present invention, the pair of horizontal heat welding opening / closing seal bars are arranged along the vertical guide by the pinion with the output shaft of the reversible servomotor installed on the machine base. It is mounted on a table with a rack that can be moved up and down, and it can be easily returned to the upstream side slightly by the control of a servo motor. In addition, a relatively heavy servo motor is mounted on the machine base, and a relatively light rack is mounted on the horizontal heat welding opening / closing seal bar mounting base, which can reduce the driving force and speed up the movement.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the seal bar type vertical automatic packaging machine of the present invention having a specification for packaging freeze-dried instant ramen drying equipment is described below with reference to the accompanying drawings. The details will be described. FIG. 1 is a vertical sectional view of a seal bar type vertical automatic packaging machine according to a representative embodiment of the present invention, and FIG. 2 is an explanatory plan view showing an inward opening state of operation of a vertical heat welding opening / closing seal bar of the vertical automatic packaging machine. FIG. 3 is an explanatory plan view showing a state where the vertical heat welding opening / closing seal bars of the vertical automatic packaging machine are pressed against each other to start vertical sealing, and FIG. 4 is a vertical view of the vertical automatic packaging machine. FIG. 5 is an explanatory plan view showing a state in which the heat welding opening / closing seal bar is pressed against each other strongly.
Is a side view showing a pair of horizontal heat welding opening / closing seal bars and an opening / closing / elevating drive device of the vertical automatic packaging machine, FIG. 6 is a front view of the vertical drive packaging device, and FIG. In an explanatory plan view for explaining the operation of the horizontal heat welding opening and closing seal bar,
FIG. 8A shows an open state, FIG. 8B shows a state where they are pressed against each other and laterally sealed, and FIG. 8 is a vertical sectional view of a conventional vertical automatic packaging machine.

Referring to FIGS. 1 to 7, a seal bar type vertical automatic packaging machine 1 used for packaging various kinds of instant ramen drying material is first tensioned by a heat-welding packaging film F fed from a reel 11. After being guided to the vertical forming chute 2 via the means 12 and folded in two in the longitudinal direction, the two side edges of the folded packaging film F are brought together, and then the two side edges are paired with each other. It is sandwiched by the heat-welding opening / closing seal bars 3 and 3'to be vertically sealed into a tube state, and laterally sealed by a pair of horizontal heat-welding opening / closing seal bars 4 and 4'which are arranged on the downstream side thereof to be in a bottomed state. . The feeding of the packaging film F is performed by the downward movement of the lateral heat welding opening / closing seal bars 4 and 4'as described later. The supply of the articles to be packaged is performed by the lateral heat welding open / close seal bar 4,
Immediately after the horizontal seal of 4 ', during the upward return movement, it is intermittently carried out from the fixed quantity supply device 5 through the intermediate receiver 6 and the inside of the chute 2 into the tubular packaging film F1 in the bottomed state. In addition, the tubular packaging film F1 is moved from the bottomed state to the sealed state each time the horizontal heat welding opening / closing seal bars 4, 4'are lifted and returned, and the rotary cutting means 7 is used to seal the lateral sealing portion of the packaging film F2. It is designed to be cut in sequence.

The vertical heat welding opening / closing seal bars 3 and 3'are substantially symmetrical with respect to the tubular packaging film F1 sandwiched between them, and have a vertically long tip portion having a length of one bag or more. Seal bars 32A, 32 in which the electric heater 31 is vertically inserted
B and their opening / closing devices 33. The opening / closing device 33 includes a pair of opening / closing swing levers 3 pivotably supported on a bracket B1 horizontally protruding from the machine base 9.
4A and 34B through the links 35 and 35 to the swing bar 36
Open / close swing by reciprocating swing. The swing bar 36 is swingably supported on a bracket B2 horizontally protruding from the machine base 9 at the base end thereof, and the cam follower 3 in the middle portion is pivotally supported.
6A is constantly urged 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 so as to be rotatable. The spring 38 is stretched between the tip of the bracket B3 and the tip of the swing bar 36, which are horizontally projected from the machine base 9 so as to rotatably support the cam 37. The rotating cam 37 is a protrusion 37 that closes the vertical heat welding opening / closing seal bars 3 and 3 so as to operate in harmony with a pair of horizontal heat welding opening / closing seal bars 4 and 4'described later.
A and the retracted portion 37B that opens and the transition portion 37C between them
And

One seal bar 32A is directly connected to one open / close swing lever 34A, while the other seal bar 32B is attached to the other open / close swing lever 34B by a spring 3.
It is connected via 2C. That is, the bolt 32D is screwed through the hole of the other seal bar 32B to the operation bar 34C integrally formed with the other open / close swing lever 34B, and the head of the bolt 32D and the other seal bar 32B are connected.
A compression spring 32C is interposed between and. Therefore, the other seal bar 32B, which is swingably engaged with the other open / close swing lever 34B, has the open / close swing lever 3
It is driven to open and close by the operation bar 34C of 4B via the bolt 32D and the spring 32C, and the vertical sealing force is given by the elastic force of the spring 32C. The screw 32E screwed to the other seal bar 32B is
It is a stopper that limits the deflection of the spring 32C.

The power for driving to open / close the vertical heat welding opening / closing seal bars 3, 3'is transmitted from the motor M1 to the main shaft X1 via the chain and the sprocket wheel, and then to the vertical axis X2 via the bevel gear. The cam 37 fixed to this axis X2 is rotationally driven. Recessed portion 37B of cam 37
When the cam follower 36A is in contact with, the swing bar 36 is swung backward to swing the pair of open / close swing levers 34A and 34B in the opening direction via the links 35 and 35, as shown in FIG. The seal bars 32A and 32B are opened by moving them. When the cam 37 rotates and the cam follower 36A comes into contact with the transition portion 37C, as shown in FIG. 3, the swing bar 36 is returned to the neutral position and the pair of opening / closing swing levers 34A, 34B are returned.
Is brought into a vertical seal starting state via the links 35, 35 and the seal bars 32A, 32B are brought into contact with each other. Cam 37
When the cam follower 36A comes into contact with the protruding portion 37A by further rotating, the swing bar 36 is swung forward to swing the open / close swing levers 34A and 34B, as shown in FIG.
By swinging in the opening direction through the seal bar 32A, 3
2B is closed. At this time, since the link 35 corresponding to the seal bar 32B is set to be slightly longer, the opening / closing rocking lever 34B is rocked forward by a large amount, and the operation bar 34C integrated with it opens the bolt 32D and the spring 32C. Spring force seal bar 32B
Is pushed against the seal bar 32A to ensure a vertical seal.

The horizontal heat welding opening / closing seal bars 4 and 4'are also substantially symmetrical with respect to the tubular packaging film F1 sandwiched therebetween, and the opening / closing / elevating drive device 40 horizontally seals each bag length. The seal bar 42, in which the electric heater 41 is horizontally penetrated almost the entire length near the contact surface, is performed.
A, 42B and their opening / closing / elevating drive device 40. The opening / closing device portion has substantially the same structure as that of the vertical heat welding opening / closing seal bars 3 and 3 ', and is a pair pivotally supported between a pair of upper and lower brackets B4 and B4 horizontally projecting from the machine base 9. Open / close swing levers 44A, 44B
The open / close swing is performed by reciprocating swing of the swing bar 46 via the links 45, 45. The rocking bar 46 has a machine base 9 at the base end.
Is swingably pivoted on a bracket B5 which is horizontally projected from the above, and the cam follower 46A in the middle part is constantly urged by a spring 48 against the cam 47, and the pair of links 45, 45 are free ends. It is pivotally supported at one point on the side so that it can turn. The spring 48 has a bracket B6 horizontally projected from the machine base 9 so as to rotatably support the cam 47.
Is stretched between the tip of the swing bar 46 and the tip of the swing bar 46. The rotating cam 47 has a projecting portion 47A for closing the horizontal heat welding opening / closing seal bars 4, 4 'and a retracting portion 47B for opening so as to perform an operation in harmony with the pair of vertical heat welding opening / closing seal bars 3, 3'. And a transition part 47C between the two.

The pair of seal bars 42A and 42B are a pair of upper and lower brackets 51 that are integrally attached to an elevating table 51.
It is rotatably supported between A and 51B, and bearings RA and RB are supported on the outside of the base end. The pair of opening / closing swing levers 44A and 44B have the above-mentioned bearing R on the front part.
Sockets SA and SB for accommodating A and RB are formed in a vertically long shape over the entire lifting stroke L.
The opening / closing force is smoothly transmitted while allowing the A and 42B to move up and down. 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 also has a guide shoe 52A slidably engaged with the vertical guide 52.

The power for driving to open and close the horizontal heat welding opening / closing seal bars 4, 4'is transmitted from the vertical axis X2 which is also used for the vertical heat welding opening / closing seal bars 3, 3 ', and is fixed to this axis X2. The cam 47 is driven to rotate. When the cam follower 46A is in contact with the retracted portion 47B of the cam 47, as shown in FIG. 7A, the swing bar 46 is swung backward to swing the pair of open / close swing levers 44A and 44B to the link 45. , 45
Swinging in the opening direction via the seal bars 42A, 42B
Is open. 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 to swing the open / close swing levers 44A and 44B to the link 45, as shown in FIG. 7B.
By swinging in the closing direction via 45,
42B is closed. At this time, the seal bar 42B also comes into contact with the seal bar 42A by using a spring, so that the lateral seal is surely performed.

The operation of the vertical automatic packaging machine 1 will be outlined below.
The horizontal heat welding opening / closing seal bars 4, 4 'are positioned at the horizontal seal position L1.
Then, the tube-shaped packaging film F1 having a bottom is sandwiched between them to start lateral sealing, and the tube-shaped packaging film F1 having a bottomed state is inflated by being slightly returned to the returning position L2 on the upstream side, and then while horizontally sealing. The heat-welding packaging film F is supplied in the longitudinal direction by pulling down the packaging film F1 over the length of one bag from the lateral sealing position L1 and moving downward in the downstream direction. After the horizontal seal is completed at the bottom dead center position L3, the horizontal heat welding opening / closing seal bars 4, 4 ′ are opened and moved upward to the horizontal sealing position L1 and the vertical heat welding opening / closing seal bars 3, 3 are also moved. 'Is closed during vertical movement of the horizontal heat welding opening / closing seal bars 4, 4'to perform vertical sealing, but is open during return movement and downward movement. By returning the horizontal heat welding opening / closing seal bars 4 and 4'to a slightly upstream side, the tubular packaging film F1 in a bottomed state is inflated, and filling of the bulged portion is promoted.

The rotary cutting means 7 is horizontally supported by bearings, and the heat sealing rolls 4 and 4'for horizontal sealing.
From the gear power transmission means of the rotary drive mechanism to the rotary drive shaft X3
This is activated when the movement of the packaging film is stopped, and cuts in the middle of the horizontal seal portion.

[0018]

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, a pair of vertically elongated vertical heat welding opening / closing seal bars can cover one bag or more. The tubular packaging film that has been vertically sealed over the length is sandwiched by a pair of horizontal heat welding opening / closing seal bars at the horizontal sealing position to start horizontal sealing and becomes a bottomed state, and then the horizontal heat welding opening / closing seal bar. Is slightly inflated by returning to the upstream side, and filling of the expanded packaged item is promoted. In particular, the bottom portion which tends to be narrowed by being sandwiched by the lateral heat welding opening / closing seal bar is expanded, which can contribute to promotion of filling. The horizontal heat-welding opening / closing seal bar is moved downward in the downstream direction to supply the heat-welding packaging film in the longitudinal direction, and is opened after completion of the horizontal seal at the bottom dead center to be moved upward to the horizontal seal position. Then, during this ascending movement, perform vertical sealing of the vertical heat welding opening / closing seal bar,
The vertical and horizontal heat-sealing open / close seal bars can be moved without interference and a sufficient sealing time can be taken.

According to the seal bar type vertical automatic packaging machine of claim 2 of the present invention, the pair of horizontal heat welding opening / closing seal bars are vertically guided by the pinion with the output shaft of the reversible servomotor installed on the machine base. It is mounted on a table with a rack that is moved up and down along with it, and can be easily returned to the upstream side slightly by the control of a servomotor. In addition, a relatively heavy servo motor is mounted on the machine base, and a relatively light rack is mounted on the horizontal heat welding opening / closing seal bar mounting base, which can reduce the driving force and speed up the movement.

[Brief description of drawings]

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

FIG. 2 is an explanatory plan view showing an inner open state of operation of a vertical heat welding opening / closing seal bar of the vertical automatic packaging machine.

FIG. 3 is an explanatory plan view showing a state in which vertical sealing is started by mutually pressing each other among operations of a vertical heat welding opening / closing seal bar of the vertical automatic packaging machine.

FIG. 4 is an explanatory plan view showing a state in which the vertical heat welding opening / closing seal bars of the vertical automatic packaging machine are strongly pressed against each other during operation.

FIG. 5 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. 6 is a front view of the elevation drive device.

FIG. 7 is an explanatory plan view for explaining the operation of a pair of horizontal heat welding opening / closing seal bars of the vertical automatic packaging machine, (a) showing an open state, and (b) pushing each other to perform horizontal sealing. It shows the state.

FIG. 8 is a vertical cross-sectional view of a conventional vertical automatic packaging machine.

[Explanation of symbols]

 1 Automatic Wrapping Machine 2 Molding Chute 3, 3'Vertical Heat Welding Open / close Seal Bar 4, 4 'Horizontal Heat Welding Open / close Seal Bar 9 Machine Stand 51 Lifting Table 52 Vertical Guide F Heat Weldable Wrap Film F1 Tube Wrap Film G2 Pinion G3 Rack L1 Horizontal seal position L2 Return position L3 Bottom dead center position M2 Servo motor

Claims (2)

[Claims] 1. A long heat-sealable packaging film supplied in the longitudinal direction is guided to a forming chute and folded in two along the longitudinal direction so that both side edges are aligned, and the both side edges are paired vertically. A heat-sealing open / close seal bar is used to vertically seal over a length of one bag or more to obtain a tubular packaging film, and the tubular packaging film is arranged at a horizontal seal position on the downstream side of the vertical heat-welding open / close seal bar. It is sandwiched between a pair of horizontal heat welding opening / closing seal bars and horizontally sealed for each bag to make a bottomed state, and while filling the tubular packaging film with the object to be packaged through the molding chute, In a vertical automatic seal bar packaging machine for producing a packaged product by sealing with the horizontal seal, the horizontal heat welding opening / closing seal bar has a tubular packaging film having a bottom between them at the horizontal seal position. Side by side After starting the sealing, the tubular packaging film in a bottomed state is inflated by being slightly returned to the upstream side, and then, while laterally sealing, pulling the packaging film over the length of one bag from the lateral sealing position in the downstream direction. It is moved down to supply the heat-welding packaging film in the longitudinal direction, and after completion of the horizontal sealing, it is opened and moved up to the horizontal sealing position, and the vertical heat-welding opening / closing seal bar is used for the horizontal heat-welding. A seal bar type automatic vertical packaging machine, which is closed during vertical movement of the open / close seal bar to perform vertical sealing and is opened at least during the downward movement. 2. The pair of horizontal heat welding opening / closing seal bars,
The vertical automatic packaging machine according to claim 1, wherein the vertical automatic packaging machine is mounted on a rack-mounted table which is vertically moved along a vertical guide by a pinion with an output shaft of a reversible servomotor installed on a machine table.