JP5358314B2 - Vertical bag making and filling machine - Google Patents

Description

  The present invention relates to a vertical bag making and filling machine for filling a bag body with an article to be packaged.

  The vertical bag making and filling and packaging machine drops a packaged article into a vertical cylindrical bag making tube, and fills and packages the packaged article in a bottom-sealed cylindrical film. When the packaged item falls and collides with the bottom surface of the bag body, pinholes may be generated on the bottom surface of the bag body, leading to a decrease in quality.

  In order to prevent the occurrence of pinholes due to the drop impact of such products to be packaged, a product drop cushioning structure for a vertical pillow packaging machine in which a plate is provided on the upper part of a horizontal sealer is disclosed in Patent Document 1. However, since this plate is opened and closed by an independent drive source, the structure is complicated and expensive. Moreover, there is a possibility that the mounting screw or the like falls from the plate material.

  On the other hand, if the buffer member for buffering the drop impact of the package is the same drive source as the horizontal sealer, the bottom-sealed cylindrical film is not filled with the package at the start of operation. . At this time, the article to be packaged is dropped and filled while the horizontal sealer is open. For this reason, the problem which a pinhole produces remains.

Japanese Utility Model Publication No. 6-69103

  The present invention is based on the above prior art, and prevents the occurrence of pinholes due to the fall of the packaged object, and a support for reducing the drop impact of the packaged object used at that time is a horizontal sealer. An object of the present invention is to provide a vertical bag filling and packaging machine capable of preventing the occurrence of pinholes even with the same drive source.

In order to achieve the above object, a vertical bag making and filling machine according to the first aspect of the present invention comprises a vertical bag making tube in which the article to be packaged falls inside when the article to be packaged is filled, and a lower part of the bag making tube. A horizontal sealer for horizontally sealing a cylindrical film fed along the outer periphery of the bag-making tube to form a bottom and an upper portion of the bag body, and sandwiching the film A horizontal sealer having a pair of heater blocks to be thermocompression-bonded , disposed between the horizontal sealer and the bag-making tube, separated from and in contact with the heater block by the opening and closing operation of the heater block, and dropping of the packaging object and a pair of resilient support to mitigate the impact on the said film by.

Furthermore, the vertical bag making filling and packaging machine of the invention of claim 1 is arranged above the bag making tube, and the packaged article supply device for intermittently charging the packaged article into the bag making tube, The opening and closing operation of the horizontal sealer and the feeding of the film are controlled, and a bag making cycle for manufacturing a bag body filled with an article to be packaged is carried out. And a control device for waiting the pair of heater blocks at an open position after a horizontal seal is formed on the film by the heater blocks .
The packaged article supply device transmits a filling propriety signal indicating whether or not filling of the packaged article is possible every bag making cycle of the bag body to the control device,
The control device is configured to start the operation of the packaging machine, immediately before the packaged object is charged, immediately before the pair of heater blocks reach the closed position, and the elastic support member of the packaged object via the film. wherein the intermediate position can be received dropping Ru positioning a pair of heater blocks.

Further, the control device controls whether or not to carry out the feeding of the film based on a combination of the filling possibility signals in the previous and current bag making cycles, and the pair of heater blocks thereafter take The power position is controlled to any one of the open position, the closed position, and the halfway position, the filling availability signal in the previous bag making cycle is filling or not, and the filling availability signal in the current bag making cycle is when it becomes set of signals indicating the filling-friendly, the feeding of the previous SL film is stopped, and that controls the position of the pair of heater blocks in said intermediate position.

According to a second aspect of the present invention, in the first aspect of the invention, the control device sets the filling propriety signal in the previous bag making cycle at the start of operation as a filling non-conformity and combines with a current filling propriety signal, The position of the pair of heater blocks is controlled.

  According to the first aspect of the present invention, since the pair of elastic supports that are separated from each other together with the opening and closing operation of the heater block are disposed between the horizontal sealer and the bag making tube, the drop impact of the packaging object can be reduced with a simple structure. A relaxing structure can be realized.

According to the first aspect of the present invention, at the start of operation of the packaging machine, immediately before the pair of heater blocks reach the closed position, and the elastic support body can receive the fall of the packaged object through the film. Since it is positioned at the position, it is possible to prevent a pinhole from being generated in the film by filling the package with the horizontal sealer opened at the start of operation.

Furthermore, according to the invention of claim 1 , even if the filling possibility signal in the present bag making cycle is filling possible, when the filling possibility signal in the previous cycle becomes a signal set such as filling or not, Hold the horizontal sealer in the middle position. In these cases, since the cylindrical film having only the bottom seal is in a state of waiting for filling of the package, the bag is not filled with the package, and conventionally, a horizontal sealer is used. Is a state waiting in the open position. If the package is dropped and filled at this time, pinholes may occur, but the heater block is in a non-contact position, i.e., the horizontal sealer is between the open position and the closed position. By positioning in a midway position where the drop impact of the packaged article can be mitigated, the packaged article can be filled while being received by the elastic support, and the occurrence of pinholes can be prevented. Further, since the pair of heater blocks are not in contact with each other at this midway position, double sealing can be prevented.

According to the second aspect of the present invention, when the operation is started, the filling availability signal in the previous bag making cycle is regarded as filling failure, and the film feeding and the position of the pair of heater blocks are controlled in combination with the current filling availability signal. Therefore, when the charge enable / disable signal at the start of operation is chargeable, the pair of heater blocks are positioned in the middle positions. Thereby, generation | occurrence | production of the pinhole at the time of a driving | operation start can be prevented. Moreover, since the opening / closing operation of the horizontal sealer and the feeding of the film can be performed by the same control method as at the time of operation, control is easy.

It is the schematic of the vertical bag making filling packaging machine which concerns on this invention. It is the schematic which showed in order the process of filling a to-be-packaged object in a bag body using the vertical bag making filling packaging machine which concerns on this invention. It is the schematic which showed in order the process of filling a to-be-packaged object in a bag body using the vertical bag making filling packaging machine which concerns on this invention. It is the schematic which showed in order the process of filling a to-be-packaged object in a bag body using the vertical bag making filling packaging machine which concerns on this invention. It is a graph explaining operation | movement of the control apparatus in a bag making cycle along a machine timing axis.

  FIG. 1 is a schematic view of a vertical bag making and filling machine according to the present invention.

  As shown in the figure, a vertical bag making and filling machine 1 according to the present invention includes a bag making tube 2, a vertical sealer 3, and a horizontal sealer 4. The bag making tube 2 is formed in a cylindrical shape. Above the bag-making tube 2, a hopper (not shown) for loading an article to be packaged is provided. The article to be packaged is put into the bag making tube 2 from the supply device 5 through the hopper (arrow A). The package is mainly food, for example, a frozen rice ball.

  A former 6 is provided on the upper outer side of the bag making tube 2. The former 6 guides the belt-shaped film f so as to surround the bag-making tube 2. The film f is fed from the reel 7 to the former 6 via a plurality of guide rollers 8. The film f is formed in a substantially cylindrical shape so as to cover the outer periphery of the bag-making tube 2 by the former 6, and both side edges thereof are overlapped with each other in the shape of a palm.

A vertical sealer 3 is provided below the former 6. The vertical sealer 3 is heat-sealed by sandwiching both side edges of the film f overlapped in a palm-like shape , that is, vertically sealed and bonded. A pair of feeders 9 (only one is shown in the figure) are disposed on both sides of the bag making tube 2 as film feeding means. The feeder 9 has an endless feeding belt 10. The feeding belt 10 feeds the film f downward along the filling tube 2 while adsorbing the film f. The operation of the feeding belt 10 is performed by rotating the pulley 14 by driving the feeding motor 13. One feed motor 13 is provided for each of the pair of feeders 9 (only one feed motor 13 is shown in the figure).

  A horizontal sealer 4 is provided below the bag-making tube 2. The horizontal sealer 4 has a pair of heater blocks 4a and 4b. These heater blocks 4a and 4b are opened and closed by being separated from each other in the horizontal direction. The cylindrical film f fed out downward is sandwiched between the heater blocks 4a and 4b and sealed laterally. The horizontal sealer 4 is opened and closed by driving a horizontal sealer drive motor 15.

A cutter (not shown) is provided in one of the heater blocks 4a or 4b, and a groove for receiving the cutter is formed in the other. After transverse sealing of the film f in the horizontal direction, the bag body 12 is manufactured by cutting with a cutter. This cutter is pushed out by the cutter cylinder 16 to cut the film f. The films 12 are successively fed out, and the lateral sealing and cutting are repeated, whereby the bag bodies 12 are manufactured one after another. At this time, the lower side of the cut portion is formed as the bag body 12, and the upper side is formed as the bottom of the bag body 12.

An elastic support 17 is disposed on the upper side of the horizontal sealer 4. The elastic support member 17 includes a pair of elastic members 17a and 17b, and is provided corresponding to the heater blocks 4a and 4b, respectively. The elastic support 17 is connected to the lateral sealer drive motor 15. Therefore, the elastic supports 17 are separated from each other as the horizontal sealer 4 opens and closes. The elastic support 17 is made of an elastic material. When filling the object to be packaged in the bag body 12 and is in a state in which the transverse sealer 4 is closed, the elastic member 17a, 17b is also closed, thus the packaged articles in which the elastic support 17 falling down Reduce the impact.

  As described above, the elastic support 17 that can be separated and connected by the horizontal sealer drive motor 15 that is the same drive source as the heater blocks 4 a and 4 b, that is, the same drive source as the horizontal sealer 4, is the horizontal sealer 4 and the bag making tube 2. Therefore, it is possible to realize a structure that supports a drop impact of an object to be packaged with a simple structure.

Furthermore, the vertical bag making and packaging machine 1 is provided with a control device 11 capable of receiving a filling availability signal from the supply device 5 , and this control device 11 includes a feeding motor 13, a horizontal sealer drive motor 15, a cutter. Connected to the cylinder 16 to control the feeding timing of the film f and the sealing timing by the horizontal sealer. This operation will be described later.

FIGS. 2A to 4R are schematic views sequentially showing the steps of filling a bag body with a package using the vertical bag making and filling machine 1 according to the present invention.

  (A) has shown the state at the time of a driving | operation start. At the start of operation, as shown in the figure, the cylindrical film f with only the bottom seal is in the filling position, and the horizontal sealer 4 is in the open position. Thereafter, as shown in (B), the article to be packaged 18 falls into the cylindrical film f. At this time, the horizontal sealer 4 moves to a midway position.

  This halfway position is a position where the heater blocks 4 a and 4 b are not in contact with each other, that is, the horizontal sealer 4 is between the open position and the closed position, and the elastic support 17 can receive the drop impact of the packaged object 18. . By holding the horizontal sealer 4 in the midway position in this way, it is possible to fill the fall impact of the article 18 while mitigating the drop impact by the elastic support member 17, and to prevent the occurrence of pinholes. In addition, the double seal can be prevented by holding the horizontal sealer 4 in the middle position instead of the closed position.

When the filling is completed, as shown in (C), the horizontal sealer 4 moves to the open position. Thereafter, as shown in (D), the film f is drawn out downward. When fed to a predetermined position, (E), the lateral Sea La 4 is moved to the closed position, the film f is heat-sealed, i.e., is laterally sealed. At the same time, the film f is cut by a cutter (not shown). At this time, the upper film f than lateral sealing since a state having a bottom seal, the packaged articles 18 are filled. During filling, but be packaged 18 falls within the film f, since in the state in which the transverse sealer 4 is closed, reliably receiving stop the elastic support body 17 in the closed position the packaged articles 18 along with this, The impact on the film f is reduced.

  When the horizontal sealer 4 is opened after the completion of filling, as shown in (F), the bag body 12 filled with the article to be packaged 18 is discharged. Since the upper cylindrical film f is filled with the article to be packaged, the film f is fed downward as shown in (G). When drawn out to a predetermined position, as shown in (H), it is sealed by the horizontal sealer 4 and cut by a cutter. At the same time, the upper film f is filled with the article to be packaged 18. And as shown to (I), the bag body 12 is formed and as shown to (J), the film f is drawn | fed out.

By repeating this bag making cycle, the bag body 12 is continuously and efficiently manufactured. However, there is a case where the package 18 is not supplied for some reason. For example, as shown in (K), the bag body 12 is manufactured by lateral sealing, but the upper film f is not filled with the article to be packaged 18. Even in such a case, the horizontal sealer 4 is moved to the open position as shown in FIG.

  As shown in (M), the feeding of the film f is stopped until the article to be packaged 18 is filled. And if the to-be-packaged item which should be filled falls, as shown to (N), the horizontal sealer 4 will move to a halfway position. Thereby, it can be filled, receiving the to-be-packaged object 18 with the elastic support body 17, and generation | occurrence | production of a pinhole can be prevented. In addition, the double seal can be prevented by holding the horizontal sealer 4 in the middle position instead of the closed position.

  When the filling is completed, the horizontal sealer 4 moves to the open position as shown in (O). Thereafter, as shown in (P), the film f is drawn out downward. And as shown to (Q), it seals with the horizontal sealer 4, and the bag body 12 is manufactured. At the same time, the upper cylindrical film f is filled with the article to be packaged 18. After completion of filling, as shown in (R), the horizontal sealer 4 is opened and the bag body 12 is discharged. By repeating this, the bag body 12 is manufactured.

  FIG. 5 is a graph for explaining the operation of the control device in the bag making cycle along the machine timing axis.

As shown in the figure, the control device 11 receives a filling availability signal, feeds out the film f , opens and closes the horizontal sealer 4 , and performs a cutting operation with a cutter. At the start of operation, the cylindrical film f bottom-sealed with the horizontal sealer 4 open is waiting for filling. The first cycle starts from here. Here, filling is started after receiving the filling possibility of the filling possibility signal. At the same time, the horizontal sealer 4 is held in the middle position. Thus, during the filling elastic supporting bearing member 17 positioned above the horizontal sealer 4 midway position relaxes the drop impact of the packaged articles 18.

After filling, with the horizontal sealer 4 open, the process proceeds to the next second cycle, and the film f is fed out to a predetermined position. The filling availability signal is confirmed at a predetermined timing in the second cycle. If filling is possible, the side sealer 4 is closed and filling is started. Since the horizontal sealer 4 is closed, the upper film f is bottom-sealed, and can be filled with the elastic support 17 at the top of the horizontal sealer 4 while mitigating the drop impact of the package 18 . Further, the cutter cylinder 16 is operated, and the horizontal seal is cut horizontally by the cutter. Thereby, the film f below the horizontal seal becomes the bag body 12 filled with the article to be packaged 18 . When the filling is completed, the lateral sealer 4 is opened and the bag body 12 is discharged at the same time.

Thereafter, the process moves to the next third cycle, and the film f is fed out to a predetermined position. Also in the third cycle, the filling availability signal is confirmed. In the illustrated example, since the signal of the third cycle can be filled, the operation is the same as that of the second cycle.

When the third cycle is completed and the fourth cycle is entered, a filling availability signal is received as filling failure. At this time, filling is not performed, but it is necessary to discharge the fill f filled with the article to be packaged 18 as the bag body 12 in the third cycle. Therefore, the lateral sealer 4 is closed and laterally sealed and cut. The lateral sealer 4 is opened and the bag body 12 is discharged.

And since it enters into the 5th cycle and the to-be-packaged object 18 is not filled by the 4th cycle, the film f is not drawn | fed out. Further, in the fifth cycle, since the filling availability signal is “no filling”, the article 18 is not filled. At this time, since the article 18 is not filled in the previous fourth cycle, the horizontal sealer 4 is not closed. Thereby, manufacture of an empty bag can be prevented. Therefore, resource saving can be realized, and labor and equipment for eliminating empty bags are not necessary.

In this state, the sixth cycle is entered, and when the filling possibility signal is received as filling possible, the horizontal sealer 4 starts to move in the closing direction, stops completely without closing, and is held for a predetermined timing. In the meantime, the article to be packaged 18 is filled. As a result, double sealing is prevented, and the drop impact of the article to be packaged 18 is mitigated by the elastic support 17 . After completion of filling, the horizontal sealer 4 is opened.

Then, in the seventh cycle, the film f is fed out. In the seventh cycle, since the filling possibility signal is acceptable, the horizontal sealer 4 is closed after the feeding is completed, and filling is started. At the same time, the horizontal seal is cut in the horizontal direction by the cutter. And it shifts to the next cycle. This is repeated and the bag body 12 is manufactured.

As described above, the feeding of the film f , the driving of the lateral sealer 4 and the driving of the cutter are not determined for each bag making cycle only by the filling possibility signal of the current bag making cycle. Table 1 summarizes the control by the control device 11 .

Table 1 shows the operation of each mechanism by the control device 11 included in the vertical bag making filling and packaging machine according to the present invention with respect to the filling availability signal.

As shown in the table, the control device controls the feeding of the film f , the opening and closing of the horizontal sealer 4 and the cutting by the cutter based on the combination of the filling / non-feeding signals of the present bag making cycle and the previous bag making cycle. ing. That is, when the filling possibility signal is acceptable in both the previous and current cycles, as shown in the second, third, and seventh cycles in FIG. 5, the film f is fed and the horizontal sealer 4 is set to the closed position. laterally sealing Te, be cut by the cutter. When filling is possible in the previous cycle and filling is not possible in the current cycle, as shown in the fourth cycle in FIG. 5, the film f is fed out, the horizontal sealer 4 is closed, the horizontal sealing is performed, and the cutter is cut. . When both the previous and present cycles indicate whether the filling is possible or not, as shown in the fifth cycle in FIG. 5, the film f is not fed out, the horizontal sealer 4 is stopped in the open position, and cutting is performed by a cutter. Also do not.

The method of the characteristic control device of the present invention, in filling determination signal indicative of the present cycle is the filling Friendly, when the signal of the previous cycle is not filled, as shown in the sixth cycle of FIG 5, the feeding of the film f is No, the horizontal sealer 4 is set to the midway position, and the cutter is not cut. As a result, the packaging material 18 is not filled while the horizontal sealer 4 is in the open position, so that the drop impact of the packaging material 18 is mitigated by the elastic support 17 at the top of the horizontal sealer 4 at the midway position, and the pinhole Occurrence can be prevented. Furthermore, it is possible to prevent double sealing.

At the start of operation, the filling / non-filling signal in the previous bag making cycle is regarded as non-filling and combined with the current filling / non-filling signal to control the feeding of the film f and the positions of the pair of heater blocks 17a and 17b . Therefore, when the charge enable / disable signal at the start of operation is chargeable, the pair of heater blocks 17a and 17b are positioned at midway positions. Thereby, generation | occurrence | production of the pinhole at the time of a driving | operation start can be prevented. Moreover, since the opening / closing operation of the horizontal sealer 4 and the feeding of the film f can be performed by the same control method as at the time of operation, control is easy.

Note that the operation of the feeding and cutter of the film f can be controlled only by the result of the filling possibility signal in the previous cycle. That is, if the previous cycle of the filling Friendly, feeding the film f, and to perform the cutting by the cutter, when the previous cycle is not filled, the film f is not fed, cut by the cutter is not performed. Such control may be performed for the feeding and the cutter.

DESCRIPTION OF SYMBOLS 1 Vertical bag making filling packaging machine 2 Bag making tube 3 Vertical sealer 4 Horizontal sealer 4a, 4b Heater block 5 Feeder 6 Former 7 Reel 8 Guide roller 9 Feeder 10 Feeding belt 11 Controller 12 Bag body 13 Feeding motor 14 Pulley 15 Horizontal Sealer drive motor 16 Cutter cylinder 17 Elastic supports 17a, 17b Elastic body f Film

Claims (2)

A vertical bag-making tube in which the packaging object falls inside when the packaging object is filled; and
A horizontal sealer for forming a bottom and an upper part of a bag body by horizontally sealing a cylindrical film that is disposed below the bag-making tube and fed out along the outer periphery of the bag-making tube , A horizontal sealer having a pair of heater blocks that sandwich and heat-press the film,
A pair of elastic members disposed between the horizontal sealer and the bag-making tube, which are separated from and in contact with the heater block by the opening and closing operation of the heater block, and alleviate the impact on the film due to the fall of the packaging object and support,
A to-be-packaged article supply device that is disposed above the bag-making tube and intermittently throws the article to be packaged into the bag-making tube;
While controlling the opening and closing operation of the horizontal sealer and the feeding of the film, to carry out a bag making cycle for producing a bag body filled with the packaged object, in preparation for the start of the next operation at the end of the operation of the packaging machine, A control device configured to wait for the pair of heater blocks in an open position after a horizontal seal is formed on the film by the pair of heater blocks;
With
The packaged article supply device transmits a filling propriety signal indicating whether or not filling of the packaged article is possible every bag making cycle of the bag body to the control device,
The controller is
At the start of operation of the packaging machine, prior to the introduction of the package, immediately before the pair of heater blocks reach the closed position, and the elastic supporter can receive the fall of the package through the film While positioning the pair of heater blocks in the middle position,
Based on the combination of the filling availability signal in the previous and current bag making cycles, it is controlled whether or not to carry out the feeding of the film, and the position to be taken by the pair of heater blocks thereafter is the open position, Control to either the closed position or the midway position,
When the filling availability signal in the previous bag making cycle is a filling failure and the filling availability signal in the current bag making cycle is a signal set indicating that filling is possible, the feeding of the film is stopped, and Controlling the position of the pair of heater blocks to the halfway position;
A vertical bag making filling and packaging machine. The control device is characterized by controlling the feeding of the film and the position of the pair of heater blocks by combining the current filling propriety signal with the filling propriety signal in the previous bag making cycle at the start of operation in combination with the current filling propriety signal. The vertical bag making filling and packaging machine according to claim 1 .

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