JPH09323708A - Bag-making device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bag-making device preventing a film from sticking to a welding material, by appropriately giving a peeling force to the film after the film has been welded with the welding material. SOLUTION: A heat-welding member 29, an opposite borad 31 thereof, a driving plate 37 forming a pressing member 29 for the heat-welding part, and an opposite board 41 thereof, are provided at the vertical movable part. The driving plate 37 and the opposite board 41 execute repeatedly a box-motion. An ultrasonic welding member with a horn 46 and an anvil 47 is provided at the lower part. After the ultrasonic welding has been completed and the horn and the anvil have been separated, the driving plate 37 and the opposite board 41 are raised a little from the position 4 to the position 5 in the state they are mutually attached to each other with a pressure. Since the film 1 is raised while being held by the driving plate 37 and the opposite board 41, when they are raised a little, the film can be securely peeled out of the horn 46.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag manufacturing apparatus for manufacturing a bag body by welding a film with a welding member while intermittently feeding a long film, and particularly to a welding member for performing ultrasonic welding or the like. The present invention relates to a bag-making device that is easily peeled off from a film.

[0002]

2. Description of the Related Art A bag W shown in FIG. 4 (D) has a stick shape, and a liquid or powder is enclosed therein. This bag body W is formed into a tubular shape by forming the vertical seal portion 2 by forming the vertical seal portion 2 by aligning the edges of the film 1 having a resin layer capable of being heat-welded on the inner surface and heat-sealing the film 1, and then flattening the upper and lower ends. Portions are welded to form welded portions 3a and 3b,
Moreover, a notch (notch) 4 is formed in one of the welded portions.

Conventionally, in the bag W of this type, the vertical seal portion 2
And the welded portions 3a and 3b are heat-welded together. However, the welding strength is unstable only by thermal welding. For example, if contents such as liquid or powder are sandwiched between the welding portions 3a or 3b, the welding strength will be extremely reduced. Therefore, the welded portions 3a and 3b are first heat-welded,
After that, it is considered that the same portion is superposed by ultrasonic waves and welded to improve the welding strength. When ultrasonic vibration is applied to the welded portions 3a and 3b, the film is heated by the internal vibrational energy and not only the melting of the resin layer on the inner surface is promoted but also the contents are sandwiched between the welded portions 3a and 3b. However, the content can be removed from the ultrasonic welding point by ultrasonic vibration, and the decrease in the welding strength due to the content being pinched can be prevented.

[0004]

In the process of manufacturing the bag body W, the film 1 as a raw material is intermittently fed in the longitudinal direction, and the heat-welding member intermittently repeats the pressure-contacting operation to cause the welding portion. The horn and the anvil, which are ultrasonic welding members, are intermittently repeatedly pressed and separated from the welded portions 3a and 3b. In this case, if a feeding mechanism for intermittently feeding the film is provided between the heat welding member and the ultrasonic welding member, the film that has been welded by the heat welding member is heat welded by the operation of the feeding mechanism. It can be easily peeled from the member. However, since the ultrasonic welding member is located in the lower stage of the feeding mechanism, the film may adhere to the horn after the welding is completed. When such a phenomenon occurs, it interferes with the feeding operation of the intermittently fed film, and the bag W
Forced to stop the continuous manufacturing operation.

Further, when manufacturing a bag other than the stick shape shown in FIG. 4D, even when the film is welded by intermittent feeding operation, the film is forcibly forced after the welding operation by the welding member. Unless a feeding mechanism is provided, the problem that the film adheres to the welding member arises as in the above case.

The present invention is to solve the above-mentioned conventional problems. After the welding of the film by the welding member is completed,
It is an object of the present invention to provide a bag-making apparatus capable of preventing a film from adhering to a welding member by appropriately applying a force for peeling the film from the welding member.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a pinching member which repeats an operation of pinching a film and feeding it by a fixed dimension, and then returning from the film by the fixed dimension.
A welding member for welding the film by intermittently press-contacting the pressed portion is provided in the subsequent stage of the pressing member, and a bag body sealed by the welding portion by the welding member is manufactured. In the bag device, after the welding by the welding member is completed, the pinching member moves for a short time in a direction away from the welding member while pinching the film, and the film is completely welded from the welding member. It is characterized in that a peeling force is given.

In the above structure, another welding member is provided in the preceding stage of the pressing member, and the film is clamped by this pressing member to cool the welded portion by the preceding welding member. Is possible. In this case, the pinching member and the welding member at the previous stage are mounted on an elevating part that moves up and down along the film, and the pinching member and the welding member can be pinched at different timings. Preferably.

Further, a notch forming member is provided for forming a notch in a pinching portion of the film when the film is pinched by the pinching member, and the pinching member separates from the welding member while pinching the film. It is possible to adopt a structure in which the notch forming member is engaged with the film and moves together with the pinching member when it moves only for a short time.

Further, the welding member is an ultrasonic welding member composed of a horn and an anvil, and when the pressing member moves in a direction away from the welding member while pressing the film, it is attached to the horn. On the other hand, it is preferable that ultrasonic vibration is applied only for a short time to promote peeling of the film from the horn.

According to the present invention, in a bag-making apparatus provided with a welding member that repeats the pressure contact operation to the film while intermittently feeding the film, the film forming apparatus is provided in the preceding stage immediately after the welding operation of the film by the welding member is completed. The film is pulled up for a short time while the film is pressed by the pressing member. Thereby, the peeling force of the film from the welding member acts, and the film is reliably peeled from the welding member. Therefore, even when a feeding mechanism for forcibly feeding the film is not provided in the subsequent stage of the welding operation part by the welding member, there arises a problem such as the stop of the continuous bag-making operation due to the adhesion of the film and the welding member. Disappear.

The pinching member may be any member as long as it repeats pinching pressure and separation and reciprocating motion with respect to the film before the welding member. For example, a film formed into a tubular shape is filled with contents. After being crushed, the tubular body may be a squeezing and squeezing member or the like intermittently.

The welding member may be a heat welding member, a high frequency welding member, an ultrasonic welding member, or the like. In the case of an ultrasonic welding member, when the film is lifted by the pinching member, By applying ultrasonic vibration for a short time, the film is vibrated and the film is easily peeled off from the horn or the like.

Further, an elevating part for moving up and down along the film is provided, and the elevating part is provided with a pressing member and a welding member at the preceding stage thereof, and the pressing member and the welding member are held at different timings. By performing pressure operation, the welding time by the welding member in the preceding stage can be controlled to be an optimum time regardless of the bag making speed and other factors that restrict the speed of the film, and the welding by the welding member in the preceding stage can be stabilized. You can

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective view showing an almost entire structure of a bag making apparatus of the present invention, FIG. 2 is an explanatory view of a bag making operation, and FIG.
FIGS. 4A to 4F are time charts showing the operating states of the respective parts, and FIGS. 4A to 4D are perspective views showing the manufacturing process of the bag in order. The stick-shaped bag W shown in FIG. 4D, which is filled with the contents, is intermittently and continuously manufactured by the bag-making apparatus shown in FIG.

A band-shaped film F having a large width is supplied to the bag manufacturing apparatus 10. This strip film F
Is a laminate of a resin film and an aluminum foil, and has a resin layer (sealant layer) that can be heat-welded on the inner surface when the bag W is formed later. The strip-shaped film F is intermittently fed mainly by the vertical movement of the elevating part K. However, an intermittent feeding force may be applied to the belt-shaped film F by an intermittent rotation operation of a roll arranged at any position as well as an up-and-down operation of the elevating part K.

The strip-shaped film F enters the grooved roll 11 provided at the uppermost portion, and a plurality of grooves 11a are formed in the grooved roll 11 so that the cutter 12 can be pressed against each groove 11a. There is. The strip-shaped film F is sectioned and cut by the cutter 12 in the width direction, and separated into a plurality of strips (three strips in FIG. 1) of the film 1. By cutting out a plurality of strips of film 1 having a predetermined width, a surplus film F having an extra short width is provided on both sides of the plurality of strips of film 1.
a is cut out, but this short film surplus film Fa is
It is guided by the surplus film guide rolls 15 and is disposed of without shifting to the subsequent bag making process.

Each film 1 separated into a certain width dimension
Is sandwiched between the guide roll 13 and the pinch roll 14 and guided downward. Each film 1 guided downward is supplied into each forming hole 16a formed in the forming plate 16 and formed into a tubular shape by the forming hole 16a. The forming plate 16 is provided with guide claws 17 facing the respective forming holes 16a, and both edge portions 1a, 1a in the width direction of each film 1 are aligned by the guide claws 17 in a palmed state. FIG. 4 (A) is an enlarged view showing a state in which the film 1 is formed into a tubular shape by the forming hole 16a and the edge portions 1a and 1a are aligned in a palmed state. The heat-sealable resin layer (sealant) is directed to the mating surfaces in the palm-filled state.

As shown in FIG. 1, a vertical seal portion S1 is provided at the subsequent stage (downward) of the molding plate 16, and a plurality of sets of vertical seal members 18 are provided for each film 1 in the vertical seal portion S1. It is provided in. Each of the vertical seal members 18 is for heat-sealing the edges 1a of the film 1 which are aligned with each other, and the vertical seal members 18 are intermittently pressed against the edge 1a of the intermittently fed film. Repeat the separating operation. The edge portion 1 is formed by the pressing operation of the vertical seal member 18.
Although a is heat-sealed with each other, FIG. 4B shows a state in which the vertical seal portion 2 is formed by this heat welding operation, and the vertical seal portion 2 is hatched. As shown in FIG. 1, a filling nozzle 19 is inserted into each molding hole 16a of the molding plate 16 from above the molding plate 16, and a liquid or liquid is introduced into the cylinder of the film 1 in which the vertical seal portion 2 is formed. The powder content is filled while controlling the flow rate.

The elevating part K is located below the vertical seal member 18. Lifting base 20 of this lifting unit K
Is supported by a guide rail (not shown) provided on the frame of the entire apparatus so as to be reciprocally movable in the vertical direction in the figure. A screw shaft 21 is fixed to the elevating base 20. A female screw driving member 22 that is screwed onto the screw shaft 21 is rotatably provided on a frame of the entire apparatus.
When the female screw drive member 22 is rotationally driven by the servo motor M, the elevating part K is vertically moved within a constant height. The elevating part K is provided with a heat seal part S2 for performing horizontal sealing on the upper stage thereof, and a pinching and cooling part C on the lower stage thereof.
Is provided. This heat seal portion S2 and pinching cooling portion C
Is mounted on the elevating base 20 and moves up and down together with the elevating base 20 with a constant vertical interval in the vertical direction.

In the heat seal portion S2, a drive cylinder 23 fixed to the elevating base 20 is provided, and a drive link 24 connected in a dogleg shape is expanded and contracted by a plunger of the drive cylinder 23. Drive cylinder 23
The plunger of the drive link 24 is a midpoint connecting fulcrum 24
a. One end of the drive link 24 is connected to the drive plate 25 and the other end is connected to the drive plate 26.
In FIG. 1, the drive link 24 has a dogleg shape, but when the plunger of the drive cylinder 23 is pulled from this state,
The drive link 24 extends linearly, the drive plate 25 moves symmetrically in the X2 direction, and the drive plate 26 moves symmetrically in the X1 direction. A pair of rods 27 are fixed to the one drive plate 25, the rods 27 are slidably inserted into the drive plate 26, and a receiving plate 28 is fixed to the tip of the rod 27.
When the driving plate 25 is driven in the X2 direction by the driving cylinder 23, the receiving plate 28 connected by the rod 27 moves together in the X2 direction.

The drive plate 26 is provided with a heat-welding member (heat-welding plate) 29 fixed to each of the three tubular films, and the heat-welding member 29 is sandwiched between the tubular films. A facing plate 31 is opposed to. This facing plate 3
1 is supported on the receiving plate 28 via a shock absorber 32. In the heat seal portion S2, when the plunger of the drive cylinder 23 is pulled and the drive link 24 extends linearly, the drive plate 26 is driven in the X1 direction, and the drive plate 25, the rod 27, and the receiving plate 28 together move to X2. Which is driven in the direction and is provided on the drive plate 26.
The tubular film is crushed by the counter plate 31 and the film is heat-welded by the heat given to the film from the heat-welding member 29. The upper part of FIG. 4C shows a state in which the tubular film is crushed and heat-welded, and the heat-welded portion is indicated by reference numeral 3.

The driving mechanism of the pinching and cooling section C is substantially the same as that of the heat seal section S2. That is, the lifting base 20
The drive cylinder 35 is fixed to the drive plate 3, and one end of a dogleg-shaped drive link (the same as that shown by reference numeral 24) driven by the plunger of the drive cylinder 35 has one end.
The other end of 6 is connected to the drive plate 37. In addition, a pair of rods 38 fixed to the drive plate 36 are attached to the drive plate 37.
The rod 38 has a receiving plate 39 fixed to the tip thereof. An opposing plate 41 is supported on the receiving plate 39 via a shock absorber (not shown). The drive plate 37 and the counter plate 41 function as a pinching member and a cooling member.

In the pinching / cooling section C, when the plunger of the drive cylinder 35 is sucked and the dog-legged drive link extends linearly, the drive plate 37 is driven in the X1 direction to drive the drive plate 36 and this drive plate. The rod 38 fixed to 36 and the receiving plate 39 fixed to the rod 38 are driven together in the X2 direction. As a result, the heat-welded portion 3 shown in FIG.
Is sandwiched between the drive plate 37 and the counter plate 41, and the heat-welded portion 3 is cooled. Further, while the heat-welding portion 3 is strongly pressed by the drive plate 37 and the counter plate 41, the entire ascending / descending portion K moves in the descending direction, so that each film 1 is given a downward feeding force in the figure. In the pinching cooling section C, the receiving plate 39
A cutter holder 42 is provided in each of the cutter holders 42, and a cutter (notch forming member) 43 is supported by each cutter holder 42. When the heat-welded portion 3 is sandwiched between the drive plate 37 and the counter plate 41, the cutter 43 causes the heat-welded portion 3 to move.
A notch is formed in the notch 4, and this notch becomes the notch 4 shown in FIGS. The notch 4 is a part that triggers the opening of the completed bag W.

As shown in FIG. 1, below the elevating part K,
An ultrasonic seal portion S3 is provided. According to the present invention, after the ultrasonic welding operation is completed in the ultrasonic seal portion S3, the film 1 is surely peeled from the ultrasonic seal portion S3. In the ultrasonic seal portion S3,
A holder 45 is fixed to a pedestal of the entire apparatus, and inside the holder 45, a horn 46 and an anvil 47, that is, an ultrasonic welding member facing each other with the films 1 interposed therebetween are provided. Further, driving means for pressing the horn 26 and the anvil 47 against each other is provided. The heat seal portion S2
The heat-sealed portion 3 welded in step 3 is further ultrasonically welded in the ultrasonic seal portion S3, and the welded portion 3 shown in the lower portion of FIG.
a and 3b are completed.

Further, a cutting mechanism is provided below the ultrasonic seal portion S3, and the welding portions 3a and 3b are cut along the cutting line LL shown in FIG. 4C by the cutting mechanism. The individual bags W shown in 4 (D) are completed. In FIG. 1, a control unit 50 that controls the operation of the entire apparatus is shown. With this control unit 50, a drive unit 51 of a servo motor M that drives the lifting unit K up and down, and the drive cylinders 23 and 3 respectively.
5 and the ultrasonic seal portion S3 are controlled.

Next, the operation of the bag making apparatus will be described. As shown in FIG. 1, the strip-shaped film F has a cutter 12
And is separated into a plurality of strips of film 1 having a constant width.
Each film 1 is formed into a tubular shape by the forming hole 16a of the forming plate 16, and the edges 1a of the film 1 are guided by the guide claws 17 so as to be in the palmed state (FIG. 4).
(A)).

In the elevating part K, the female screw driving member 22 is rotationally driven by the power of the servomotor M, and the elevating force is applied to the screw shaft 21, so that the elevating part K has a constant height H.
(Refer to FIG. 2) and the lifting operation is repeated. In the meantime, in the pinching / cooling section C, the driving cylinder 35 drives the driving plates 36 and 37.
Are driven, and the drive plate 37 and the counter plate 41 functioning as a pinching member and a cooling member repeat the pressure contact / separation operation. As shown in the left and right sides of FIG. 2, the drive plate 37 and the counter plate 41 move away from the lower step-down contact position to the lowered and separated position, and further move up by a distance H to the raised and separated position, and further to each other. Pressed to reach the rising pressure position. After that, the film is once held for a very short period of time (for example, a short distance of about 0.5 mm) to once rise to the ascending position, and then descends from the ascending position by a distance (H + ΔH) and returns to the original lower depressurizing contact position. In the so-called box operation, the film is lifted by ΔH from the rising pressure contact position to the rising position, and each film 1 is pulled down by the dimension H from the rising position to the lower pressure lowering contact position. Further, each film 1 is stopped during the period from the lower press contact position to the ascending press position.

By the above box operation, each film 1
Is intermittently fed downward by a distance H, but within the stop period of the film 1 in this intermittent feeding operation (when the ascending / descending portion K is raised), in the vertical sealing portion S1, each pair of vertical sealing members 18 However, heat is applied from the vertical seal member 18 by sandwiching the edges 1a of the film 1 which are aligned with each other, and the edges 1a are heat-sealed by the alignment of the palms to form the vertical sealing portion 2 ( See FIG. 3 (A) and FIG. 4 (B).

Further, the contents such as liquid or powder are filled from the filling nozzle 19 into the film 1 having a cylindrical shape with the vertical seal portion 2 formed. Further, during the period in which each film 1 is intermittently fed downward (when the ascending / descending section K is descending), in the heat seal section S2, the drive plates 25 and 26 are driven in the X1 and X2 directions by the drive cylinder 23. The tubular film is pressed into contact with the heat-welding member 29 and the counter plate 31, heat is applied to the film from the heat-welding member 29, and the heat-welding portion 3 shown in the upper part of FIG. 4C is formed ( Figure 3
(B)).

Immediately after the heat welding is completed, the heat welding member 29 and the counter plate 31 rise by the distance H, and at the same time, the drive plate 37 and the counter plate 41 of the pinching and cooling unit C rise. Further, it moves from the ascending / separating position to the ascending pressure contact position, and the thermal welding portion 3 is pinched by the drive plate 37 and the counter plate 41. Then, it descends to the lower step-down contact position. During this time,
The heat weld 3 is cooled by the drive plate 37 and the counter plate 41, and the notch 4 is formed by the cutter (notch forming member) 43. Further, during the stop period of the intermittent feeding operation of the film 1 (when the ascending / descending section K is raised), the ultrasonic sealing section S3 is provided with a horn 4 which is an ultrasonic welding member.
6 and the anvil 47 sandwich each heat-welded portion 3, and the horn 46
Ultrasonic vibration is applied to the heat-welded portion 3 to further ultrasonically weld it, and the welded portions 3a and 3 shown in the lower portion of FIG.
b is formed (see FIG. 3E). Further, below the ultrasonic seal portion S3, the welded portions 3a and 3b are cut along the cutting line L-L and separated into individual bags W.

FIG. 3 is a timing chart showing the operation timing of each part. FIG. 3 (A) is a pressure contact / separation operation of the vertical seal member 18 in the vertical seal portion S1, FIG.
Is the heat-welding member 29 and the facing plate 3 in the heat-sealing portion S2.
3 is a press contact / separation operation with respect to FIG. 1, FIG. 3 (C) is a press contact operation and a separation operation between the drive plate 37 and the counter plate 41, which are the clamping members of the clamping pressure cooling section C, and FIG. The position, FIG. 3 (E), shows the horn 46 and the anvil 47 in the ultrasonic seal portion S3.
FIG. 3 (F) shows the application timing of the ultrasonic waves, and FIG.

As shown in FIG. 3D, the ascending / descending section K is stopped at the position where it is elevated by the height H for the time T1, and further, Δ
It rises by H and stops for time T2. After that time T
The distance H is lowered by the distance H + ΔH during 3 and is stopped at the lowered position for the time T4, and then is raised by the distance H during the time T5. Since the elevating part K is moved up and down by the servo motor M, the descending time T3 and the ascending time T5 can be arbitrarily controlled by changing the descending speed and the ascending speed. That is, the bag W
The falling time T3 and the rising time T5 can be set independently according to the change in the number of products manufactured per unit time. For example, by setting T3> T5, the descending time T3 is secured only for the time required for cooling by the clamping pressure between the drive plate 37 and the counter plate 41, and after the cooling is completed, the elevating part K is moved to the ascending position in a short time T5. It is possible to restore it.

Further, the heat seal portion S provided on the elevating portion K
Since the independent drive cylinders 23 and 35 are provided in 2 and the pinching / cooling unit C, the pressure contact / separation operation by the heat seal unit S2 and the pressure contact / separation operation by the pinching cooling unit C can be individually controlled. First, in the heat seal portion S2, as shown in FIG.
As shown in (B), during the time T2 when the elevating part K is stopped at the ascending position and the time T6 up to the middle of the descending time T3,
The heat-welding member 29 and the counter plate 31 are in pressure contact with each other, and the pressure contact time T6
At, heat is applied to the film 1 from the heat welding member 29, and the heat welding portion 3 is formed. The pressure welding time (heat welding time) T6 can be arbitrarily set by controlling the drive cylinder 23, and the heat welding is performed regardless of the length of the descending time T3 of the ascending / descending section K and the pressure welding time T7 of the pinching / cooling section C. Time T6
You can decide. Therefore, it is possible to set the heat welding time T6 so that uniform heat welding can always be performed even when the intermittent feeding speed of the film 1 is changed.

In the operation of the pinching and cooling section C shown in FIG. 3C, the time T during which the elevating section K is raised by a distance H and stopped
The drive plate 37 and the counter plate 41 move in the inside of 1 from the rising and separating position in pressure contact with each other to reach the rising press contact position. After that, while sandwiching the film 1 at time T2, the film 1 is raised by a short distance ΔH of, for example, about 0.5 mm to reach the raised position, and the time T
Then, the elevator K is lowered by a distance H + ΔH and stopped at the lowered position. The time T7 during which the drive plate 37 and the counter plate 41 clamp the film is the stop time T1.
From the middle of to the end of the descent time T3. In the present invention, after the distance H is increased and the time T1 is stopped, the film 1 is held by the drive plate 37 and the counter plate 41 while being held by Δ.
H rises slightly, but at this time film 1 has ΔH
Will only be lifted.

As shown in FIG. 3 (E), the ascending / descending portion K is raised (the intermittent feeding of the film 1 is stopped).
During time T5, the horn 46, which is an ultrasonic welding member, and the anvil 47 are in pressure contact with each other, and as shown in FIG. 3 (F), ultrasonic waves are applied during a predetermined time T8 within this pressure contact time T5. By applying this ultrasonic wave, the heat-welded portion 3 is further ultrasonically welded. After the ultrasonic welding is completed and the horn 46 and the anvil 47 are separated from each other, when the film 1 is clamped by the drive plate 37 and the counter plate 41 of the pinching and cooling unit C and lifted by ΔH, a short time is required. The ultrasonic vibration is again applied to the horn 46 by ΔT9. When the ultrasonic welding is completed and the horn 46 and the anvil 47 are separated, the phenomenon that the film 1 adheres to the horn 46 due to the heat of fusion of the film 1 easily occurs, but the film 1 is pulled up by ΔH. At the same time, the ultrasonic vibration is applied again for a short time ΔT9, so that the film 1 is easily peeled off from the horn 46.

Further, in the pinching and cooling section C, a cutter (notch forming member) 43 is provided in the counter plate 41, and the drive plate 3 is provided.
When the heat-sealed portion 3 is sandwiched between the heat-welded portion 7 and the facing plate 41, the cutter 43 cuts through the part of the heat-welded portion 3 of the film to form the notch 4. Further, even when the film 1 is lifted by ΔH, the drive plate 37 and the counter plate 4 are
Not only is the heat-welded portion 3 sandwiched between 1 and 1, but the cutter 43 cuts into the heat-welded portion 3 of the film.
As a result, the film 1 is lifted, and the driving plate 37 and the counter plate 41 do not slip on the film 1, and a sufficient peeling force from the horn 46 can be given. Therefore, it is possible to prevent the ultrasonic seal portion S3 and the film 1 from adhering to each other without providing a mechanism for forcibly feeding the film 1 to the next stage of the ultrasonic seal portion S3, and the continuous manufacturing operation of the bag W is performed as described above. Problems such as stopping due to adhesion do not occur.

The bag making apparatus of the present invention is not limited to the production of the stick-shaped bag W shown in FIG. 4 (D), but a cylindrical bag having foods such as sausage and cheese as its contents. It can also be applied to manufacturing such as. Further, in the above configuration example, after performing ultrasonic welding, the film is pulled up by the pinching member to prevent the ultrasonic welding member and the film 1 from adhering to each other. However, for example, in the preceding stage of the heat welding member or the ultrasonic welding member. By disposing the pressing member, the film can be easily peeled off from the heat welding or ultrasonic welding portion.

[0039]

As described above, in the present invention, when the ultrasonic welding or the welding by other welding means is completed, the pressing member provided in the preceding stage operates so as to peel the film from the welding means. Therefore, it is possible to prevent the film and the welding means from adhering to each other without providing a mechanism for forcibly feeding the film next to the welding means.

[Brief description of drawings]

FIG. 1 is a perspective view showing the overall structure of a bag making apparatus of the present invention,

FIG. 2 is a side view showing the process of welding and cooling the bag body and the operation of the pinching member,

3A to 3F are time charts showing operation timings of respective parts,

4A to 4D are perspective views showing a manufacturing process of a bag,

[Explanation of symbols]

 F Band-shaped film K Elevating part S1 Vertical seal part S2 Heat seal part S3 Ultrasonic seal part C Clamping and cooling part 1 Film 3 Heat weld parts 3a, 3b Weld part after ultrasonic weld 4 Notch 12 Cutter 16 Forming plate 18 Vertical seal Member 19 Filling nozzle 20 Elevating base 29 Thermal welding member 31 Counter plate 37 Drive plate (clamping cooling member) 41 Counter plate (clamping cooling member) 43 Cutter (notch forming member) 46 Horn (ultrasonic welding member) 47 Anvil ( Ultrasonic welding member)

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Motoo Shikata 1-4-16 Nihonbashi Bakurocho, Chuo-ku, Tokyo Fujimori Industry Co., Ltd. (72) Inventor Hiroyuki Matsui 1-4-1 Nihonbashi Bakurocho, Chuo-ku, Tokyo Fujimori Industry Co., Ltd.

Claims (5)

[Claims] 1. A pinching member that repeats an operation of pinching a film and feeding it by a fixed dimension, and then separating it from the film and returning it by the fixed dimension, and a pinching member at a stage subsequent to the pinching member. In a bag making apparatus, which is provided with a welding member for welding a film by intermittently pressing, and in which a bag body manufactured by a welding portion by the welding member is manufactured,
After the welding by the welding member is completed, the pressing member moves only in a direction away from the welding member while pressing the film, and a peeling force from the welding member is applied to the film after the welding is completed. A bag making device characterized by being used. 2. The other welding member is provided in front of the pressing member, and the pressing member presses the film,
The welded portion formed by the welding member in the preceding stage is cooled.
The described bag making device. 3. The pinching member and the welding member in the preceding stage are mounted on an elevating part that moves up and down along a film, and the pinching member and the welding member can be pinched at different timings. 3. The bag making apparatus according to claim 2, which is applied. 4. A notch forming member is provided for forming a notch in a pinching portion of the film when the film is pinched by the pinching member, and the pinching member separates from the welding member while pinching the film. The bag making apparatus according to any one of claims 1 to 3, wherein the notch forming member is locked to the film and moves together with the pinching member when moving to a short time. 5. The welding member is an ultrasonic welding member composed of a horn and an anvil, and when the pressing member moves in a direction away from the welding member while pressing the film, the horn is attached to the horn. The bag making apparatus according to any one of claims 1 to 4, wherein ultrasonic vibration is applied only for a short time to promote peeling of the film from the horn.