JP2006256671A - Item packaging machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an item packaging machine capable of efficiently packaging items into beltlike film. <P>SOLUTION: The item packaging machine is used to place and package each item S from a slit 1d using the film 1 designed such that both widthwise sides of a beltlike film 1 longitudinally extending and composed of a rear film 1b and a front film 1a are sealed in advance, thereby storage spaces are defined between both the films 1a and 1b and the widthwise slits 1d are formed at predetermined intervals in the front film along the length of the film 1. The item packaging machine includes a film conveying mechanism that conveys the film 1 in the direction of its length, a biting mechanism 40 that bites the film 1 at both widthwise sides of the film 1, places each item via the slit 1d opened and closed while the beltlike film 1 is bitten, a sealing mechanism 50 that seals the area of the slit 1d after the item S is thus placed, and a cutting wire 504 that cuts the sealed area. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention can form an accommodation space between the back side film and the front side film by sealing both sides in the width direction of the strip-like film extending in the longitudinal direction consisting of the back side film and the front side film in advance. The present invention relates to an article wrapping machine for throwing articles through the slits and packaging them using a belt-like film in which slits along the width direction are formed on the surface side at predetermined intervals along the direction.

Various article wrapping machines are known that seal an article after the article is accommodated in a band-shaped film formed in a bag shape (for example, Patent Document 1 below). After the article to be packaged is put into the belt-like film, the packaging is completed by sealing a predetermined portion. By the time the packaging is completed, an operation to draw a predetermined amount of the belt-shaped film wound up in a roll shape, an operation to cut the belt-shaped film into a predetermined size, an operation to store the article in the belt-shaped film, the article has been stored Although there is an operation for sealing the opening of the belt-like film, there is no article packaging machine that automates all of these operations. In particular, in order to put an article into the belt-like film, an operation such as widening the opening is necessary, and this is often performed manually, which reduces the efficiency of the packaging operation.
JP 2003-048250 A

  This invention is made | formed in view of the said situation, The subject is providing the goods packaging machine which can perform efficiently the operation | work when packaging goods in a strip | belt-shaped film.

In order to solve the above problems, an article wrapping machine according to the present invention provides:
It is possible to form an accommodation space between the back side film and the front side film by sealing both sides in the width direction of the belt-like film extending in the longitudinal direction consisting of the back side film and the front side film, along the longitudinal direction. An article wrapping machine for throwing articles from the slit and packaging them using a belt-like film in which slits along the width direction are formed on the surface side at predetermined intervals,
A film transfer mechanism for transferring the belt-like film along the longitudinal direction;
A film clamping mechanism for sandwiching the belt-like film on both sides in the width direction of the belt-like film, and allowing the article to be inserted through the slit by opening and closing the slit in the state of sandwiching the belt-like film;
A film sealing mechanism that seals the area where the slit is formed after the article is thrown in;
And a film cutting mechanism for cutting the seal region.

  The operation and effect of the article packaging machine having such a configuration will be described. As for the strip | belt-shaped film used with this article packaging machine, the width direction both sides of the back surface side film and the surface side film are sealed beforehand. Thereby, the accommodation space for accommodating articles | goods can be formed between a back surface side and a surface side film. Moreover, the slit which followed the width direction for every predetermined interval along the longitudinal direction is formed in the surface side of a strip | belt-shaped film. The slit functions as an opening for loading the article, but is sealed after the article is loaded.

  A film transport mechanism for transporting along the longitudinal direction of the belt-like film is provided. The belt-like film transferred by the film transfer mechanism is clamped on both sides in the width direction by the film clamping mechanism. The slit is opened and closed while the belt-like film is held by this film holding mechanism. That is, by opening the slit, an opening for putting in the article is formed, so that the article can be put in reliably and automation is possible. After the article is loaded, the slit forming area is sealed by a film sealing mechanism. Further, the sealed area is cut by a film cutting mechanism. Thereby, the packaging of the article on the belt-like film is completed. In this way, a series of procedures until the article is accommodated can be automatically performed, and work efficiency is improved. As a result, it is possible to provide an article wrapping machine that can efficiently perform an operation for packaging an article on a belt-like film.

In the present invention, the film clamping mechanism is
A sandwiching unit comprising a pair of sandwiching members located on both sides in the width direction of the region where the slits are formed and sandwiching the film surface of the belt-like film;
A rotational axis set in a state orthogonal to the film surface on both sides in the width direction of the belt-shaped film;
A first sandwiching unit drive mechanism for switching between a state in which the sandwiching unit sandwiches the film surface and a state in which the film surface is not sandwiched;
A second clamping unit drive mechanism for rotating the clamping unit around the rotation axis;
It is preferable to cause the slit to open by rotating around the axis of rotation with the holding unit holding the film surface.

  As the film clamping mechanism, a clamping unit is provided, and a pair of clamping members that clamp the film surface of the belt-like film are provided. The pair of clamping members are respectively disposed on both sides in the width direction of the slit forming region. The clamping unit is provided so as to be rotatable around a rotation axis set in a state orthogonal to the film surface. As a mechanism for driving the clamping unit, first and second clamping unit driving mechanisms are provided. A 1st clamping unit drive mechanism is a mechanism for switching the state which clamps a film surface, and the state which does not clamp. The second sandwiching unit driving mechanism rotates the sandwiching unit around the rotation axis while sandwiching the film surface. By this operation, the strip film can be deformed in the direction in which the slit opens. By providing the clamping unit as described above, the opening / closing control of the slit can be performed by a simple operation.

  In this invention, it is preferable that the interlocking member for interlocking mechanically the clamping unit provided in the width direction both sides is provided.

  In the case where the both sides in the width direction of the belt-like film are sandwiched by the sandwiching units and are rotated, the sandwiching units on both sides in the width direction need to perform the same movement. By making the same movement, the slits can be evenly opened in the width direction. Therefore, the slits can be appropriately opened and closed by interlocking the clamping units on both sides in the width direction with the interlocking member.

  In the present invention, the clamping member has a rotation support part supported by the rotation axis, a clamping action part that clamps the film surface, and a connecting part that connects the rotation support part and the clamping action part, It is preferable to cause the slit to open so that the distance between the clamping action portions located on both sides in the width direction is shortened by rotating the clamping member.

  The sandwiching member includes a sandwiching action part that sandwiches the film surface. When the sandwiching member is rotated, the interval between the sandwiching action parts located on both sides in the width direction is shortened. Thereby, it operates in the direction in which the slit opens. As described above, the slit can be opened and closed by a simple operation of rotating the holding member.

  In the present invention, it is preferable that a film guide member for guiding the belt-like film is provided between the pair of sandwiching members of the sandwiching unit, and the film guide member is configured to follow in conjunction with the rotational drive of the sandwiching unit. .

  In order to sandwich the strip film with the pair of sandwiching members, it is necessary to guide the strip film between the pair of sandwiching members. Therefore, by providing the film guide member, the belt-like film can be successfully guided to a predetermined place. The film guide member is configured to follow in conjunction with the rotational drive of the clamping unit. Thereby, a strip | belt-shaped film can be guided appropriately irrespective of the position of a clamping unit.

  In this invention, it is preferable to provide the slit opening fan which ventilates for opening a slit. By providing such a fan, the slit can be surely opened together with the action of the clamping unit.

The belt-shaped film according to the present invention is provided with a mark for detecting the position in the longitudinal direction, and mark detection means for detecting the mark,
It is preferable to provide a film transfer control means for transferring the belt-like film to a predetermined position and stopping it based on the mark detection result.

  When the belt-shaped film is sandwiched by the sandwiching unit, it is necessary to sandwich a predetermined portion near the slit. Therefore, a mark for detecting the position in the longitudinal direction is given to the strip film, and the strip film can be transferred to an appropriate position by detecting this mark.

The film sealing mechanism according to the present invention is:
A film seal portion for sealing and cutting the slit forming region of the belt-shaped film;
A seal control unit for controlling the operation of the film seal unit,
The film seal is
Film clamping means for clamping the vicinity of the slit forming region of the belt-shaped film;
Film crimping means for crimping and heating the slit forming region;
The film cutting mechanism for cutting the sealed portion along the width direction; and
A cutting part opening means for opening the cutting part by the film cutting mechanism,
The seal control unit operates the film clamping unit and the film pressing unit to heat and press the slit forming region of the belt-like film and perform the cutting action by the film cutting mechanism, and then releases the pressing state of the film pressing unit. At the same time, it is preferable to control the film seal portion so that the cutting portion is opened by the cutting portion opening means.

  According to this structure, a film seal part has the function to seal and cut | disconnect the slit formation area of a strip | belt-shaped film. The seal control unit controls the operation of the film seal unit. The film seal portion includes a film clamping unit that clamps the vicinity of the slit forming region, a film pressing unit that presses and heats the slit forming region, and the film cutting mechanism that cuts the sealed portion. The procedure until sealing and cutting the slit forming area is performed as follows.

  After the film is transferred by the film transfer mechanism, it is stopped at a predetermined position. Next, the film clamping means and the film pressing means are operated to heat and press the slit forming area. The slit forming region is melted and sealed by heating with the film pressing means. Moreover, the cutting action with respect to a seal location is performed by a film cutting mechanism. Next, the pressure-bonding state of the film pressure-bonding means is released, and the cutting portion is opened. When the band-shaped film is heat-pressed, the seal portion may stick to the film press-bonding means and become difficult to separate. In order to avoid this, a cutting location opening means is provided so that the cutting location can be reliably separated and the state of attachment to the film crimping means can also be released. As a result, the sealed slit forming region can be reliably cut and separated.

  The film crimping means according to the present invention includes a first crimping body and a second crimping body for crimping the slit forming area, and a heater for heating the slit forming area on the first crimping body and a film cutting mechanism are provided. It is preferably incorporated so that the heating action and the cutting action can be performed simultaneously.

  The film press-bonding means includes a first press-bonded body and a second press-bonded body, and the first and second press-bonded bodies cooperate to press the slit forming region and perform heat sealing. Of the pair of pressure-bonded bodies, a heater and a film cutting mechanism are incorporated in the first pressure-bonded body, and the cutting action can be performed simultaneously with heating with the heater. Since the film crimping means and the film cutting mechanism can be driven in the same manner, the configuration of the film seal portion can be simplified.

In the present invention, the film crimping means includes a first crimping body and a second crimping body that crimp the slit forming region,
The film sandwiching means includes a first sandwiching body and a second sandwiching body that sandwich the slit forming region,
The first clamping body is supported by the first crimping body in a state of being biased in the clamping direction by the first biasing means,
The second clamping body is supported by the second pressing body in a state of being biased in the clamping direction by the second biasing means,
By driving the first crimping body and the second crimping body in the crimping direction by the crimping body driving mechanism, the first sandwiching body and the second sandwiching body are also driven in the same direction, and the first sandwiching body and the second sandwiching body are So that the first and second pressure-bonding bodies are continuously driven against the urging force of the first and second urging means so as to crimp the slit forming region. It is preferable that the film seal part is comprised.

  According to such a configuration, the film crimping means includes the first crimping body and the second crimping body, and the first and second crimping bodies cooperate to crimp the film and perform heating and sealing. The film clamping means includes first and second clamping bodies, and the film can be clamped by the pair of clamping bodies. The first and second clamping bodies are supported by the first and second crimping bodies, respectively, and are urged in the clamping direction by the first and second urging means, respectively.

  According to this configuration, the sealing / cutting operation by the film seal portion is performed as follows. The first and second pressure bodies are driven in the pressure bonding direction by the pressure body driving mechanism. Along with the driving of the first and second crimping bodies, the first and second clamping bodies are also driven in the clamping direction. Then, the film is first clamped by the first and second clamping bodies, and thereafter, the first and second crimping bodies are continuously driven in the crimping direction in a form against the urging force by the urging means. If it will be in a crimping | compression-bonding state, the heating effect | action with respect to a slit formation area will be performed. Moreover, the cutting action with respect to the sealed location is also performed.

  After the heat sealing is performed, the pressure-bonded state by the first and second pressure-bonded bodies is released, and the separating action by the above-described cutting location opening means is performed. According to the above configuration, it is possible to release the pressure bonding of the first and second pressure-bonded bodies while maintaining the state of being held by the first and second clamped bodies. In other words, the first and second sandwiching bodies and the first and second crimping bodies are both driven by the crimping body drive mechanism, but the first and second sandwiching bodies and the first and second crimping bodies are connected to each other via the biasing means. The pressure-bonded state of the first and second pressure-bonded bodies can be released while the band-shaped film is held between the first and second clip-shaped bodies.

In the present invention, each of the first and second sandwiching bodies is provided with a pair of sandwiching action portions so as to sandwich the belt-like film at two locations along the transfer direction.
The cutting location opening means preferably opens the cutting location by simultaneously driving the pair of sandwiching action portions in opposite directions in the film transfer direction.

  A pair of sandwiching action portions are provided so as to sandwich the cut portion, and these are simultaneously driven in opposite directions in the film transport direction, so that the cut portion can be forcibly opened.

  In the present invention, it is preferable that a drive source for driving the first clamping body in the opening direction is provided, and mechanical interlocking means for driving the second clamping body in the same direction by driving the first clamping body is provided.

  A drive source for driving the first sandwiching body is provided, and a drive source for driving the second sandwiching body in the opening direction is provided by driving the second sandwiching body in conjunction with the first sandwiching body. Therefore, the configuration can be simplified.

  A preferred embodiment of an article packaging machine according to the present invention will be described with reference to the drawings. First, the structure of the strip | belt-shaped film used suitably with this goods packaging machine is demonstrated.

<Configuration of strip film>
FIG. 1 is a view showing the appearance of the strip film 1. FIG. 2 is a view showing a state where the accommodation space for the strip-shaped film 1 is expanded. The belt-like film 1 is composed of a front-side film 1a and a back-side film 1b, and has a shape that extends long in a belt-like shape. Seal regions 1c are formed on both sides in the width direction of the belt-like film 1, and the front side film 1a and the back side film 1b are sealed (by a method such as fusion or adhesion). Thereby, the accommodation space which accommodates articles | goods can be formed between the surface side film 1a and the back surface side film 1b. The band-like film 1 has slits 1d formed at predetermined intervals. The slit 1d is formed along the width direction of the surface-side film 1a of the belt-like film 1, and an article can be put into the inside through an opening (see FIG. 2) formed by the slit 1d.

  Moreover, the vicinity area | region (slit formation area 1e) in which the slit 1d is formed is adhere | attached by being fuse | melted by a film sealing mechanism. The areas to be sealed are both sides of the slit 1d in the transfer direction A (see FIG. 1), and the lower and upper sides of the slit 1d are melt-bonded (sealed). Accordingly, when an article is put in, as shown in FIG. 1, the slit forming region 1e is first sealed and then the article is put in through the slit 1d. Since the slit forming region 1e is adhered, the thrown-in article can be received without falling. Next, the article S can be accommodated in the film by sealing the slit 1d into which the article S is inserted in the same manner. Next, as shown in FIG. 3, the article S is accommodated in a film (bag) by cutting the portion of the slit 1d into which the article has been placed. In addition, the thing cut | disconnected from the strip | belt-shaped film 1 and the state in which the articles | goods S were accommodated shall be called packaged goods. In FIG. 3, the left and right sides of the film are originally bonded regions 1c, but the upper and lower regions are formed by sealing the slit forming region 1e.

  The slit 1d is positioned at the center in the width direction of the slit formation region 1e (seal region), and when cutting, the portion where the slit 1d is formed is cut. Thus, when the article S is to be put in, the lower side is always sealed.

  Moreover, the mark 1f is printed on the strip | belt-shaped film 1 for every predetermined interval similarly to the slit 1d. The mark 1 f is formed in a linear shape on both sides in the width direction of the belt-like film 1, and is printed in black that does not easily transmit light. Since the longitudinal distance between the mark 1f and the slit 1d is determined in advance, the position of the slit 1d can be known by detecting the mark 1f. The position where the mark 1f is formed and the shape / color of the mark can be changed as appropriate.

<Configuration of the packaging machine>
Next, the configuration of the article packaging machine will be described. 4 shows a side view of the article packaging machine, and FIG. 5 shows a front view. This article wrapping machine is a machine that continuously puts in and wraps articles using the belt-like film 1 shown in FIG.

  On the film mounting portion 10, the belt-like film 1 is set in a form wound on a roll 1R. The lower portion of the roll 1R is supported by a support roller 11 and a drive roller 12. These function as a film base for supporting the roll 1R. The film stage feed motor 13 is connected to the driving roller 12 via a speed reduction mechanism, and applies a rotational driving force to the outer surface of the roll 1R. The dancer roller 14 is supported by a swing bar 14a so as to be swingable with respect to the rotation support shaft 14b. Further, a guide roller 15 is provided above the upper end side of the dancer roller 14, and the strip-like film 1 drawn out from the roll 1 R is once guided downward by the dancer roller 14 through the guide roller 15. Head up.

  The film transfer unit 20 is provided with a film transfer mechanism for transferring the belt-like film 1 at a predetermined speed. The film transfer motor 21 is a pulse motor and drives a film guide roller 22a disposed on the top of the transfer path. The film 1 is nipped and transferred by the guide roller 22a and the pressure roller 22b in pressure contact therewith. By providing the film transfer motor 21, the belt-like film 1 can be transferred at a predetermined speed set in advance. A dancer roller 14 is provided to absorb the difference between the movement of the roll 1R and the movement of the film guide roller 22a. The strip film 1 guided by the film guide roller 22a is directed vertically downward. A guide plate 23 for guiding the belt-like film 1 downward is provided. A slit opening fan 24 is provided on the surface of the guide plate 23 and sends the wind downward from the blower 24a. As a result, as will be described later, the slit 1d formed in the belt-like film 1 is opened to make it easier to load the article.

  The guide plate 23 is provided with a mark detection sensor 25 (corresponding to a mark detection means), and detects the mark 1f of the belt-like film 1. The mark detection sensor 25 can be configured by an optical sensor including a light emitting unit and a light receiving unit. By detecting the mark 1f, the strip film 1 can be controlled to stop at a predetermined position.

  The article input unit 30 has a mechanism for supplying an article in the direction of the slit 1 d of the belt-like film 1. A first article receiving section 31 and a second article receiving section 32 are provided, and once the article is received by the first article receiving section 31, the article is delivered to the horizontal second article receiving section 32. Next, by driving the feeding motor 33, the second article receiving portion 32 is converted from the horizontal state to the inclined state, and the article is thrown from the slit 1d by gravity.

  The film clamping mechanism 40 has a function of clamping the belt-like film 1 and opening the slit 1d. A pair of sandwiching units 41 for sandwiching the belt-like film 1 is provided on both sides in the width direction. The sandwiching unit 41 is switched between a state in which the film surface of the belt-like film 1 is sandwiched and a state in which it is not sandwiched by the sandwiching opening / closing motor 42. Further, as shown in FIG. 5, the clamping unit 41 is rotatably supported around the rotation axis 41 a and is driven to rotate by the arm vertical movement motor 43. The slit 1d of the belt-like film 1 can be opened by the rotational drive of the clamping unit 41. Details of the film clamping mechanism 40 will be described later.

  The film sealing mechanism 50 has a function of heat-sealing the slit forming region 1e in a state in which the band-shaped film 1 is sandwiched by the film sandwiching mechanism 40 after the article is loaded. The crimping body opening / closing motor 51 is provided to open and close a pair of crimping bodies for heat-sealing the slit forming region 1e. The slit forming area 1e of the belt-like film 1 is pressure-bonded by closing the pressure-bonded body and sealed by heating. The film sealing mechanism 50 is also provided with a film cutting mechanism for cutting the seal portion. The peeling solenoid 52 has a function of peeling off the cut portion. Details of the film seal mechanism 50 will be described later.

  In the stacking mechanism 60, as shown in FIG. 3, the strip-like film 1 (packaged product) into which articles are put and cut into predetermined units is stacked. When the package H falls on the receiving plate 61, the horizontal receiving plate 61 is driven and tilted, and the package H is accumulated in the accumulation box 62.

<Structure of film clamping mechanism>
Next, the configuration of the film clamping mechanism 40 will be described. 6 is a front view of the film clamping mechanism 40, FIG. 7 is a plan view, and FIG. 8 is a side view. FIG. 9 shows a perspective view of the main part.

  As shown in FIG. 6, sandwiching units 41 that sandwich the strip film 1 are provided on both sides of the strip film 1 in the width direction. The clamping unit 41 can rotate around the rotation axis 41a, and the rotation axis 41a is set in a state orthogonal to the film surface. Each clamping unit 41 is composed of a first clamping member 411 and a second clamping member 412, and each has a clamping rubber 413 (corresponding to a clamping action part) for clamping the film surface. The sandwiching rubber 413 is attached to the rubber support shaft 414. The holding unit 41 is rotatably supported by a rotation support shaft 415 (corresponding to a rotation support portion), and a connection arm 416 having a substantially L shape in side view for connecting the rotation support shaft 415 and the holding rubber 413 (see FIG. Equivalent to the connecting portion). A rubber support shaft 414 is fitted into a hole formed at the tip of the connecting arm 416 so as to be rotatable. Thereby, the clamping unit 41 can be rotated around the rotation axis 41a while the film surface is clamped by the clamping rubber 413.

  Further, a connecting bar 417 (corresponding to an interlocking member) for mechanically interlocking the pair of sandwiching members 411 is provided so that the left and right sandwiching members 411 can rotate with the phases aligned. As shown in FIG. 7, a fitting hole in the width direction is formed in the rubber support shaft 414 so as to pass through the connection bar 417 (a thin shaft-shaped member). Similarly, the pair of clamping members 412 are also provided with connecting bars 417 that are mechanically interlocked.

  As shown in FIG. 6, the arm rotary plate 400 for driving the first clamping unit 41 to rotate is driven by the arm vertical movement motor 43. The arm rotating plate 400 is attached with a link plate 401 extending in the diametrical direction integrally coupled thereto, and a link lever 402 is attached to connecting shafts 401 a provided at both ends of the link plate 401. The link lever 402 is rotatably supported on a link lever support shaft 403 provided on the connecting arm 416. Thereby, by rotating the arm rotating plate 400, the connecting arm 416 is rotated by the action of the link mechanism. This mechanism is also provided on the second clamping member 412 side. As described above, the second clamping unit drive mechanism that rotates the clamping unit 41 is provided.

  Next, the 1st clamping unit drive mechanism for switching to the state in which the clamping unit 41 clamped the film surface and the state which does not clamp is demonstrated. The state shown in FIG. 7 is a state in which the film surface can be clamped, but the film surface is clamped by moving the first clamping member 411 in the A direction shown in FIG. 8 and the second clamping member 412 in the B direction. The pair of holding rubbers 413 that have been moved moves in a direction away from each other.

  A connecting member 420 for driving the first clamping member 411 is integrally attached. Further, driving frames 421 and 422 are integrally attached to the connecting member 420, and has a substantially inverted C-shaped frame configuration in a side view (see FIG. 8). Further, similar drive frames 423 and 424 are attached to the rotation support shaft 415 of the second holding member 412, and have a substantially C-shaped frame configuration in a side view.

  As shown in FIG. 4, the first bevel gear 44 and the second bevel gear 45 are driven by the sandwiching opening / closing motor 42, whereby the rotation drive shaft 425 can be driven to rotate. When the rotary drive shaft 425 is rotated, the drive plate 426 connected thereto is rotated. The drive plate 426 is provided with a pair of link bars 427 in a point-oriented manner. Further, each link bar 427 is provided with a drive bar 428. The drive bar 428 is configured to be driven in the film width direction (the direction of arrow C in FIG. 7). One end side of the link bar 427 is rotatably supported by the link pin 427a with respect to the drive plate 426, and the other end side is rotatably supported by the link pin 427b with respect to one end side of the drive bar 428.

  A link pin 428a is also provided on the other end side of the link bar 428, and the first drive connection plate 429 and the second drive connection plate 430 are rotatably attached. The other end side of the first drive connection plate 429 is rotatably supported by the link pins 421a with respect to the drive frames 421 and 422, and the other end side of the second drive connection plate 430 is also connected to the drive frame 423. 424 is rotatably supported by a link pin 423a.

  When the rotary drive shaft 425 is rotated counterclockwise in FIG. 7 with such a configuration, the pair of drive bars 428 are driven in directions approaching each other, and in conjunction therewith, the first and second drive connecting plates 429 and 430 are driven. , The drive frames 421 and 422 and the drive frames 423 and 424 are driven in a direction approaching each other. That is, the first clamping member 411 moves in the direction of arrow A in FIG. 8 and the second clamping member 412 moves in the direction of arrow B. Thereby, it can be set as the state which the clamping unit 41 does not clamp a film surface. This state is shown as a plan view in FIG.

  Guide shafts 432 (rotating shaft core 41a) are provided on both sides in the film width direction, and the movement of the first and second clamping members 411 and 412 in the directions of arrows A and B can be guided. An attachment frame 433 is provided to support a pair of guide shafts 432 provided in the width direction.

  As clearly shown in the perspective view of FIG. 9, a film guide member 46 is provided above each clamping unit 41. A film guide member 46 is attached so as to be rotatable around a rotation axis 46 a set on the support frame 47. A slit 46b is formed in the film guide member 46 and guides both sides in the width direction of the belt-like film 1 that has moved from above. By this film guide member 46, the belt-like film 1 is transferred between the first and second clamping members 411 and 412. The film guide member 46 has a shape bent in an L shape in a front view of FIG. Moreover, it is comprised so that it may rotate with dead weight, and the front-end | tip part 46c is set so that it may face in the direction of the clamping rubber 413 always. Thereby, the strip | belt-shaped film 1 can be guide | induced to the direction clamped with the clamping rubber 413 reliably. If the first and second clamping members 411 and 412 rotate, the film guide member 46 is also rotated following this.

<Clamping action by the clamping unit>
Next, the clamping action by the clamping unit 41 will be described. FIG. 11 is a side view showing an operation position by the clamping unit 41, FIG. 12 is a front view thereof, and FIG. 13 is a plan view.

  As shown in FIG. 11, PA, PB, and PC are set in order from the top as action points. At the point PA, as shown in FIG. 12, the clamping unit 41 is most rotated clockwise. At this position, the both sides of the film 1 in the width direction are first clamped. At this time, the slit 1d of the film 1 is in a closed state. Next, when the holding unit 41 is rotated counterclockwise by a predetermined amount, the interval between the holding rubbers 413 on both sides in the width direction becomes narrower (PB point). Thereby, the film 1 is deformed and the slit 1d is opened. Further, since the air is blown by the slit opening fan 24, the slit 1d is surely opened. In this state, articles can be put in through the slit 1d.

  Next, the clamping unit 41 is rotated again by a predetermined amount in the counterclockwise direction. This position is indicated by the PC point, and the gap between the sandwiching rubbers 413 on both sides in the width direction is the same as the PA point. Thereby, the film 1 is in a tensioned state, and the slit 1d into which the article S is put is sealed. FIG. 12 shows a relative positional relationship between a heater 503 (described later) and the clamping unit 41.

<Configuration of film seal mechanism>
Next, the film sealing mechanism 50 that seals the slit 1d portion of the belt-like film 1 will be described. 14 is a perspective view showing the film sealing mechanism 50, FIG. 15 is a side view of the sealing mechanism, and FIG. 16 is a side sectional view of the sealing mechanism. 17 and 18 are diagrams showing the operating state of the film seal mechanism 50. FIG.

  First, the function of the film seal part will be described. A first pressure-bonded body 501 and a first pressure-bonded body 502 are provided. As shown in FIG. 16 and the like, the first and second pressure-bonded bodies 501 and 502 have a standby position spaced apart from each other and a pressure-bonding surface. It is comprised so that it can move between the crimping | compression-bonding positions which contact mutually and crimp the film 1 (refer arrow D and E). The crimping surfaces 501a and 502a (corresponding to the film crimping means) of the first and second crimping bodies 501 and 502 correspond to the shape of the slit forming region 1e (slit 1d) of the film 1 and are line shapes extending in the width direction. Is formed. A heater 503 extending in a line shape is attached to the inside of the crimping surface 501a of the first crimping body 501. The heater 503 is a metal resistor and is heated by a heating circuit (not shown). A cutting wire 504 (corresponding to a film cutting mechanism) extending in a line shape is provided on the surface of the heater 503 in the same manner as the heater 503. A cover member 505 is provided so as to cover the heater 503 and the cutting wire 504. The cover member 505 protects internal mechanisms such as the heater 503, and is a sheet member made of Teflon (registered trademark). A support member 506 made of silicon rubber is attached to the crimping surface 502 a of the second crimping body 502. The film 1 is crimped and clamped by the pair of crimping surfaces 501a and 502a.

  A first clamping body 511 (corresponding to film clamping means) that can move relative to the first crimping body 501 is attached to and supported by the first crimping body 501. The 1st clamping body 511 is provided in two places along the transfer direction (arrow G of FIG. 16) of the film 1, and is provided in two places up and down so that the crimping | compression-bonding surface 501a may be pinched | interposed. Each first sandwiching body 511 includes a sandwiching rubber 511c, and a first rubber support plate 511a and a second rubber support plate 511b that support the sandwiching rubber 511c. The sandwiching rubber 511c is made of silicon rubber, and its surface functions as a sandwiching surface. The first and second rubber support plates 511a and 511b are coupled by screws, thereby supporting the sandwiching rubber 511c.

  A support frame 513 having a substantially U-shaped cross section in a side view is provided on the side opposite to the crimping surface 501 a of the main body portion 512 constituting the first crimping body 501. The support frame 513 and the first clamping body 511 are coupled by a leaf spring 514 at two locations in the film width direction. The leaf spring 514 and the support frame 513 are coupled by a screw 514a, and the distal end side of the leaf spring 514 is also coupled by the first clamping body 511 by a coupling shaft 514b. The leaf spring 514 is biased in a direction in which the main body portion 511 is sandwiched between the pair of upper and lower first sandwiching bodies 511.

  Two spring support shafts 515 are planted on the opposite side of the crimping surface 501 a of the main body portion 512. A coil spring 516 that is a compression coil spring is inserted into the spring support shaft 515. The biasing force of the coil spring 516 (corresponding to the first biasing means) acts between the head 515a of the spring support shaft 515 and the support frame 513.

  A second clamping body 521 (corresponding to film clamping means) that can move relative to the second crimping body 502 is also attached to and supported by the second crimping body 502. Similarly, the second holding body 521 includes first and second rubber support plates 521a and 521b and a holding rubber 521c.

  A support frame 523 having a substantially U-shaped cross section when viewed from the side is also provided on the side opposite to the crimping surface 502 a of the main body portion 522 constituting the second crimping body 502. The support frame 523 and the second sandwiching body 521 are coupled by a leaf spring 524 at two locations in the film width direction. The urging direction of the leaf spring 524 is the same as that of the leaf spring 514.

  Two spring support shafts 525 are planted on the opposite side of the crimping surface 502a of the main body portion 522. A coil spring 526 (corresponding to the second urging means) that is a compression coil spring is inserted into the spring support shaft 525. The biasing force of the coil spring 526 acts between the head 525a of the spring support shaft 525 and the support frame 523.

  The second rubber support plates 511b and 521b are formed with engaging protrusions 511d and 521d at both ends in the width direction. The upper and lower engaging protrusions 521d on the second sandwiching body 521 side are formed so as to enter inside the upper and lower engaging protrusions 511d on the first sandwiching body 511 side (see FIG. 18). According to this configuration, when the engagement protrusions 511d and 521d are engaged with each other, when driven in a direction in which the distance between the upper and lower engagement protrusions 521d is increased, the distance between the engagement protrusions 511d is also increased. . The engagement protrusions 511d and 521d are driven to surely cut (strip off) the slit forming region 1e as will be described later. As described above, the engagement protrusions 511d and 521d function as mechanical interlocking means.

  Next, a mechanism for driving the engagement protrusions 511d and 521d (corresponding to a cutting location opening means) will be described. This mechanism is provided on both sides of the film 1 in the width direction. The peeling solenoid 52 is provided with a drive shaft 53, and one end side of the link levers 54 and 55 is rotatably supported by a connecting pin 53a at a tip end portion thereof. The other end side of the link lever 54 is connected to the upper first rubber support plate 521a, and the other end side of the other link lever 55 is connected to the lower first rubber support plate 521a. When the solenoid 52 is driven to move the drive shaft 53 in the direction of the arrow H (see FIG. 15), the state shown in FIG. 18 is obtained, and the engagement protrusions 511d and 521d can be driven in the direction in which the film 1 can be cut. The solenoid 52 is attached to a solenoid support plate 530, and the support plate 530 is further integrally coupled to the support frame 523. Accordingly, the drive mechanism including the solenoid 52 can be moved together with the movement of the second crimping body 502.

  Next, a pressure body driving mechanism for driving the first and second pressure bodies 501 and 502 will be described. Drive gears 540 and 541 are connected to the motor 51. A drive disk 542 is pivotally supported around the rotation axis 542a. The rotary disk 542 is provided with a first link shaft 543 and a second link shaft 544 as opposed to 180 °. The drive gear 541 is provided with a connecting shaft 541 a. The connecting shaft 541 a and the first link shaft 543 are connected by a connecting lever 545.

  A first link lever 546 is connected to the first link shaft 543 and drives the first crimping body 501. A support body 548 that supports the main body portion 512 of the first crimping body 501 is provided, and is coupled to the first link lever 546 by a link shaft 546a. A second link lever 547 is connected to the second link shaft 544 and drives the second crimping body 502. A support body 549 that supports the main body portion 522 of the second crimping body 502 is provided, and the second link lever 547 is connected by the link shaft 547a. Each of the supports 548 and 549 can be driven in the directions of arrows D and E from the state shown in FIG. 15, and a guide rail 550 for that purpose is provided. By driving the motor 51 and rotating the drive disk 542 in the clockwise direction, the first and second pressure-bonding bodies 501 and 502 can be driven in a direction approaching each other. Thereby, the film 1 can be crimped | bonded and the slit formation area | region 1e can be sealed.

<Film seal operation>
Next, the film sealing operation will be described with reference to FIGS. 19A and 19B. As shown in FIG. 19A (a), the film 1 loaded with the article S is set at a predetermined position by the holding unit 41. That is, the slit 1d is set at a position that is sandwiched between the first pressure-bonding surface 501a and the second pressure-bonding surface 502a. Next, by driving the crimping body opening / closing motor 51 and rotating the drive disk 542, the first and second crimping bodies 501 and 502 are driven in a direction approaching each other as shown in FIG. 19A (b). Arrows D and E). At this time, since the clamping rubbers 511c and 521c of the first and second clamping bodies 511 and 521 are set to protrude from the crimping surfaces 501a and 502a, the film 1 is first clamped by the clamping rubbers 511c and 521c. It will be in the state. The locations to be sandwiched are two locations above and below the slit forming region 1e, and are sandwiched across the entire width direction.

  In this state, the first and second sandwiching bodies 511 and 512 can no longer move, but the motor 51 is continuously driven, so that the main body portion 512 of the first pressure-bonding body 501 and the main body portion 522 of the second pressure-bonding body 502. Are driven in a direction closer to each other. At this time, the spring support shafts 515 and 525 implanted in the main body portions 512 and 522 also move together. However, since the support frames 513 and 523 have already stopped, the coil springs 516 and 526 are gradually compressed. It will be in a state to go. Then, as shown in FIG. 19A (c), the motor 51 is stopped when the first and second pressure-bonding surfaces 501a and 502a come into contact with each other.

  After stopping the motor 51, the heater 503 is heated to melt and seal the seal portion. After heating by the heater 503, cooling for a predetermined time is performed. Moreover, the cutting action by the cutting wire 504 is also performed simultaneously.

  After the predetermined sealing operation is completed, as shown in FIG. 19B (d), the motor 51 is rotated by a predetermined amount in the opposite direction. Accordingly, the first and second pressure-bonding surfaces 501a and 502a are driven in directions away from each other (arrows D ′ and E ′). However, the holding rubbers 511c and 512 are held in a state of being held for a while. The peeling solenoid 52 is driven simultaneously with the reverse driving of the motor 51 or with a slight delay. As a result, the drive shaft 53 is driven to retract into the solenoid 52, and as shown in FIG. 19B (e), the upper and lower engagement protrusions 512d and 511d are driven in a widening direction. Thereby, the location cut | disconnected with the cutting wire 504 can be peeled off reliably. Further, even when the film surface is in close contact with the pressure-bonding surfaces 501a and 502a, the film surface can be peeled off.

  Next, when the solenoid 52 is turned off, the first sandwiching bodies 511 and 512 can return to the original state together with the action of the leaf springs 514 and 524. Next, by further rotating the motor 51 in the reverse direction, the film seal mechanism 50 can be returned to the original initial state as shown in FIG. 19B (f).

<Accumulation mechanism>
Next, the accumulation mechanism 60 will be described. The accumulation mechanism 60 accumulates the packaged articles H into which articles have been put in order. When the film 1 is sealed by the film sealing mechanism 50, the receiving plate 61 is set in a horizontal state. After sealing and cutting are performed by the film sealing mechanism 50, the package H is dropped onto the receiving plate 61. Thereafter, the receiving plate 61 is driven by a driving mechanism (not shown), and the packaged product H is dropped with the stacking box 62 by its own weight. As shown in FIGS. 4 and 5, the receiving plate 61 has a shaft 61 a along the film width direction.

<Control block diagram>
Next, FIG. 20 shows a control block configuration showing functions of the article packaging machine according to the present invention. The control unit 19 has a function of controlling the overall operation of the article packaging machine, and can be configured by a control circuit (hardware) or a control program (software). The input side of the control unit 19 includes various sensors, switches, and the like, and the driving of devices such as a motor, a solenoid, and a fan is controlled by receiving signals from these input sides.

  The control unit 19 controls each unit such as a film transfer control unit that detects the mark 1f and transfers the belt-like film 1 to a predetermined position and stops it, and a seal control unit that controls the operation of the film seal unit.

  Description of elements already described is omitted. The cooling fan 70 is used to cool the first and second pressure-bonding surfaces 501a and 502a and the periphery thereof after the heating action by the heater 503 is performed in the film seal mechanism 50. The indicator 71 is a display member indicating that the article packaging process is in progress, and is configured by, for example, an LED. The indicator 71 can be installed at an appropriate place. The article insertion start signal receiving unit 73 receives an article insertion start signal. This signal informs in advance that an article will be conveyed from now on, and it is necessary to set the article packaging machine in a predetermined state in response to this signal. This signal is transmitted from the device manufacturing apparatus.

  The film detection switch 74 detects the state of the film 1 in the vicinity where the dancer roller 14 is provided. Specifically, the film detection switch 74 determines whether or not the predetermined film 1 is in a slack state by the dancer roller 14. Monitor. When the slack is reduced, the film feed motor 13 is driven so that the film 1 can be pulled out from the roll 1R. The article residual sensor 75 detects whether or not an article is put into the film 1 having the slit 1d expanded. The arm origin detection switch 76 is a switch for detecting that the clamping unit 41 is located at the PA point (origin) shown in FIG.

  The sandwiching open position switch 77 is a switch that detects that the first and second sandwiching members 411 and 412 are in an open state (a position where the film 1 is not sandwiched). The sandwiching closed position switch 78 is a switch for detecting that the first and second sandwiching members 411 and 412 are in a closed state (position where the film 1 is sandwiched). With these switches, it is possible to monitor whether or not the film 1 is securely held. In this case, the switch is constituted by, for example, a micro switch.

  The crimping body opening position switch 79 is a switch that detects that the first and second crimping bodies 501 and 502 are in an open state (a position where the slit forming region 1e of the film 1 is not crimped). The crimping body closed position switch 80 is a switch that detects that the first and second crimping bodies 501 and 502 are in a closed state (position where the film 1 is crimped). These switches are constituted by, for example, micro switches. With these switches, it can be reliably monitored whether or not the film 1 is attached by pressure bonding. The article discharge confirmation sensor 81 detects whether or not the packaged product H into which the article S has been loaded and cut from the belt-like film 1 has been discharged to the stacking mechanism 60. The heater temperature thermocouple 82 detects the heating temperature by the heater 503. Thereby, it can be monitored whether appropriate temperature control is performed.

  The first fan rotation sensor 83 monitors whether the slit opening fan 24 is operating reliably. The second fan rotation sensor 84 monitors whether the cooling fan 70 is operating reliably.

<Operation sequence>
<Initial setting>
First, the procedure for setting an initial state in which an article can be loaded at any time will be described with reference to the flowchart of FIG. First, the roll 1R is set on the film mounting portion 10 (# 1), and the film 1 is pulled out from the roll 1R and brought to the position of the film guide roller 22a (# 2). Next, the film stand feed motor 13 and the film transfer motor 21 are driven to transfer the film 1 (# 3). After the film 1 is transferred, the mark detection sensor 25 detects the mark on the film 1 (# 4). After the mark is detected, the film 1 is transferred to a predetermined position and then stopped (# 5). In this stop state, the slit 1d on the lowermost side of the belt-like film 1 is in a position to be sandwiched between the first and second pressure-bonding surfaces 501a and 502a.

  Next, the film sealing mechanism 50 is operated to seal the slit forming area 1e (# 6). Thereby, the film 1 can be formed in a state where an article can be charged. Next, the film transfer motor 21 is driven again to transfer the predetermined amount of film 1 and then stop (# 7, 8). That is, the slit 1d immediately after the sealed slit 1d is set at a predetermined position. This state is a standby state in which articles can be put in any time (# 9).

<Article input / packaging>
Next, the operation when an article is packed and packaged by the article packaging machine will be described with reference to the timing charts of FIGS. 21A and 21B and the flowcharts of FIGS. 23A and 23B. At t ₀ before the article is put in, it waits for the article input start signal to be input (# 20).

At time t ₁ , an article insertion start signal is issued and received by the article insertion start signal receiving unit 73 (# 21). In response to this, the clamping opening / closing motor 42 is driven for a predetermined time from t ₁ to t _2, and a predetermined portion of the film 1 is clamped by the clamping unit 41 (# 22). A clamping open position switch 77 for detecting the open position of the clamping unit 41 is switched from on to off at t ₁ , and a clamping close position switch 78 for detecting the closed position is switched from off to on at t ₂ . Thereby, the open / closed state of the clamping unit 41 can be monitored. A plan view of the state in which the film 1 is sandwiched is shown in FIG.

Further, the cooling fan 70 starts driving at t ₁ , and in particular, the cooling action for the first and second pressure-bonding surfaces 501 a and 502 a heated by the heater 503 of the film seal mechanism 50 is started. Further, an indicator 71 for externally indicating that the article packaging machine is operating is lit. As the cooling fan 70 starts to be driven, the second fan rotation sensor 84 monitors whether or not the cooling fan 70 is reliably driven.

When the film 1 is sandwiched at time t ₂ , the arm vertical movement motor 43 is driven. Driving is performed from t ₂ to t ₄ , whereby the slit 1 d of the film 1 is forcibly opened. As shown in FIGS. 11 to 13, the clamping position moves from the PA point to the PB point (# 24), so that the slit 1d is opened. Further, since the slit opening fan 24 is also rotationally driven at t ₂ (# 23), the slit opening fan 24 is caused to act in the direction of further opening the slit 1d. As the slit opening fan 24 is driven, monitoring by the first fan rotation sensor 83 is performed from time t ₂ ′. Thereby, it is monitored whether the slit opening fan 24 is operating reliably.

Since the nipping position is lowered downward, the film transfer motor 21 is also driven in synchronism with the driving of the arm vertical movement motor 43 (# 25). Thereby, the clamping unit 41 operates while the film 1 is transferred. The film feed motor 13 is also driven at timings t _{3 to} t ₅ that are slightly delayed from the time zone in which the film transfer motor 21 is driven. Thereby, the operation | movement from which the film 1 is pulled out from the roll 1R is performed. The film feed motor 13 is driven in conjunction with the on / off state of the film detection switch 74. Thereby, the predetermined slack amount of the film 1 by the dancer roller 14 can be held.

When the slit 1d is set in an open state, the process waits for the article S to be loaded (# 26). The article residual sensor 75 has a function of detecting that the article S has been input from the article input unit 30. The article residual sensor 75 can be constituted by an optical sensor including a light emitting unit and a receiving unit arranged so as to sandwich the film surface. When the article is inserted, the light is blocked and the article S passes therethrough. Can be detected. When it is detected that the article has passed between times t _{6 and} t ₇ , first, the slit opening fan 24 is stopped at time t ₆ . Thereby, the detection state by the first fan rotation sensor 83 is also switched from on to off.

At time t _7, again, and the arm moved up and down motor 43 and the film transport motor 21 is started driving (# 27). Driving is performed until t ₇ ~t _9. Also, as before, at a timing slightly delayed, the film base feed motor 13 is performed until _{t 8 ~t 10 (# 28)} . By the operation at this time, the clamping position moves from the PB point to the PC point as shown in FIG. As a result, the slit 1d is changed from the open state to the closed state (see FIG. 13). On the other hand, the discharge unit drive motor 72 is driven at t ₇ time, is set to accept the plate 61 becomes horizontal state (# 29).

When the clamping position moves to the PC point, the sealing operation for the slit forming region 1e becomes possible. Thus, at time t _9, it starts driving the crimp opening and closing motor 51 (# 30). Crimping opening and closing motor 51, during the period from t ₉ to t _11, it is driven. The state at time t ₉ is the state shown in FIG. 19A (a), FIG. 15, and FIG. And Figure 19A (b) and (# 31) through the state shown in FIG. 17, the state shown in FIG. 19C (c) at time t _11. Moreover, crimping body open position switch 79 on the switch to off at time t _9, the crimping body closed position switch 80 is switched from off to on at time t _11. From these switches, the open / close state of the crimping bodies 501 and 502 can be monitored.

When it is detected that the crimping bodies 501 and 502 are closed (# 32), heating by the heater 503 is started (# 33). Thereby, the slit forming region 1e is heated and melted and sealed. The sealed area is sealed at the top and bottom with the slit 1d as the center. Further, since the first and second pressure-bonding bodies 501 and 502 are pressure-bonded to each other, the cutting wire 504 also acts on the film 1 at the same time, so that the cutting operation is performed simultaneously with the heating operation. The heating time by the heater 503 is from time t ₁₁ to t ₁₂ , and thereafter, it is set as the cooling time until t ₁₃ . FIG. 21B shows the transition of the temperature detected by the thermocouple. This heating / cooling time can be set in advance by a timer.

The sealing operation is completed, first, at time t _13, by driving the clamping closing motor 42, to release the holding state of the film 1 by pinching units 41 (# 34). By driving the clamping unit 41, the state of the clamping opening position switch 77 and the clamping closing position switch 78 is also switched. Thereby, the packaged product H in which the article S is packaged is dropped and mounted on the receiving plate 61 by its own weight. The article discharge check sensor 81 this condition, at time t _14, can be checked.

Further, at time t _13, drives the crimping opening and closing motor 51 in the reverse direction, peeling the solenoid 52 for driving (# 35, 36). Drive until t ₁₃ ~t _16, is performed. By driving the crimping bodies 501 and 502 to the open state, the states of the crimping body opening position switch 79 and the crimping body closing position switch 80 are also switched. Further, when the solenoid 52 is driven, as shown in FIG. 19B (e) and FIG. 18, the portion cut by the cutting wire 504 is forced to open, and the packaged product H is reliably separated. can do. Since it is a position along the slit 1d that is cut by the cutting wire 504, the lowermost part of the band-shaped film 1 after the package H is cut from the band-shaped film 1 is also sealed. Therefore, the next article S can be continuously received.

Discharge unit drive motor 72 is actuated twice in t ₁₅ and t _20. In first t _15, is inclined by driving the acceptance plate 61 in the horizontal state around the axial center 61a (see FIG. 4). Furthermore, the second t _20, to further drop the packages H to drive the receiving plate 61 to the integrated box 62 (see FIG. 5) (# 37).

On the other hand, the arm vertical movement motor 43 is driven to return the clamping position from the PC point to the PA point in FIG. 11 (# 38). Drive time is from t ₁₇ to t _23. The arm origin position switch 76 is also switched from OFF to ON. Further, after the arm moves up and down motor 43 is driven, the driven film transport motor 21 at time t _21, the film base feed motor 13 is driven at time t _22. Thereby, the film 1 is transferred again (# 39).

By the transfer of the film 1, in t _24, marks 1f are detected by the mark detection sensor (# 40). With the detection of the mark 1f, it drives the pinching-off motor 42 at t _25, a state which sandwiches the film 1. Further, the film transport motor 21 is temporarily stopped only during the operation of holding the film 1. Next, at t ₂₆ , the arm vertical movement motor 42 is driven to move the clamping position from the PA point to the PB point and wait for the next article to be put in. Further, the driving of the film transfer motor 42 is started simultaneously with the driving of the arm vertical movement motor 42. Driving the film transport motor 21 is performed until the time t _27, the driving of the film base feed motor 13 is performed until time t _28. Hereinafter, it waits with the upper body which stopped the film 1 until articles | goods S were thrown in (# 41), and operation | movement when articles | goods S are thrown is as having demonstrated previously (# 22 or less). The same operation is repeated as many times as the article S is inserted.

If to terminate the operation of introducing the articles S, as shown in the time t _30, the article is turned start signal is switched off (# 42). In response to this signal, the arm vertical movement motor 43 rotates in the reverse direction and returns from the PB point to the PA point in FIG. Since the film 1 is transferred in the return direction by this operation, the film transfer motor 21 is similarly driven in the reverse direction to transfer the film 1 in the return direction. At time t ₃₁ when this transfer is completed, the clamping opening / closing motor 42 is driven to shift from the state in which the film 1 is sandwiched to the state in which it is not sandwiched. In conjunction with these movements, the state of each switch is also switched.

Further, in the t _30, the slit opening fan 24, cooling fan 70, the indicator 71 are both in a state of off. Thereby, the detection state by the rotation sensors 83 and 84 also shifts from on to off (return processing of # 43).

<Another embodiment>
In the present invention, the articles put into the belt-like film 1 are not limited to specific types.

  In the present invention, the material and size of the belt-like film 1 are not limited to specific ones. For example, the housed article can be made visible from the outside using a transparent resin film. The length of the slit 1d and the position of the mark 1f can be changed as appropriate.

Figure showing the appearance of the strip film The figure which shows the state which expanded the accommodation space of the strip-shaped film The figure which shows the state in which the articles | goods were accommodated in the film The figure which shows the side view of the article wrapping machine Figure showing the front view of the packaging machine Front view of film clamping mechanism Plan view of film clamping mechanism Side view of film clamping mechanism The perspective view which shows the structure of the principal part of a film clamping mechanism The top view of the film clamping mechanism which shows the state where a clamping unit does not clamp a film Side view for explaining the clamping action by the clamping unit Front view explaining the clamping action by the clamping unit Plan view for explaining the clamping action by the clamping unit Perspective view showing the configuration of the film seal mechanism Side view showing the configuration of the film seal mechanism Side sectional view showing the configuration of the film seal mechanism Side view explaining operation of film seal mechanism Side view explaining operation of film seal mechanism Diagram explaining film seal operation Diagram explaining film seal operation Block diagram explaining the functions of the packaging machine The figure which shows the timing chart when wrapping goods The figure which shows the timing chart when wrapping goods Flowchart explaining the procedure until the film is set to the standby state Flow chart showing the procedure when packaging goods Flow chart showing the procedure when packaging goods

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Band-shaped film 1a Front surface side film 1b Back surface side film 1c Area 1d Slit 1e Slit formation area 1f Mark 10 Film mounting part 13 Film stand feed motor 20 Film transfer part 24 Slit opening fan 25 Mark detection sensor 30 Article input part 40 Film clamping part 41 clamping unit 42 clamping opening / closing motor 43 arm vertical movement motor 50 film seal mechanism 51 pressure body opening / closing motor 52 peeling solenoid 60 stacking mechanism 411 first clamping member 412 second clamping member 413 clamping rubber 501 first pressing body 502 second pressing Body 501a first crimping surface 502a second crimping surface 503 heater 504 cutting wire 511 first sandwiching body 521 second sandwiching body

Claims (12)

It is possible to form an accommodation space between the back side film and the front side film by sealing both sides in the width direction of the belt-like film extending in the longitudinal direction consisting of the back side film and the front side film, along the longitudinal direction. An article wrapping machine for throwing articles from the slit and packaging them using a belt-like film in which slits along the width direction are formed on the surface side at predetermined intervals,
A film transfer mechanism for transferring the belt-like film along the longitudinal direction;
A film clamping mechanism for sandwiching the belt-like film on both sides in the width direction of the belt-like film, and allowing the article to be inserted through the slit by opening and closing the slit in the state of sandwiching the belt-like film;
A film sealing mechanism that seals the area where the slit is formed after the article is thrown in;
An article wrapping machine comprising a film cutting mechanism for cutting a seal region. The film clamping mechanism is
A sandwiching unit comprising a pair of sandwiching members located on both sides in the width direction of the region where the slits are formed and sandwiching the film surface of the belt-like film;
A rotational axis set in a state orthogonal to the film surface on both sides in the width direction of the belt-shaped film;
A first sandwiching unit drive mechanism for switching between a state in which the sandwiching unit sandwiches the film surface and a state in which the film surface is not sandwiched;
A second clamping unit drive mechanism for rotating the clamping unit around the rotation axis;
2. The article wrapping machine according to claim 1, wherein the sandwiching unit is rotated around the axis of rotation while the film surface is sandwiched so that the slit is opened.   The article wrapping machine according to claim 2, further comprising an interlocking member for mechanically interlocking the holding units provided on both sides in the width direction.   The clamping member has a rotation support part supported by the rotation axis, a clamping action part that clamps the film surface, and a connecting part that connects the rotation support part and the clamping action part, and rotates the clamping member. The article wrapping machine according to claim 2 or 3, wherein a distance between the sandwiching action portions located on both sides in the width direction is shortened so that the slit is opened.   A film guide member for guiding a belt-like film between a pair of sandwiching members of the sandwiching unit is provided, and the film guide member is configured to follow in conjunction with the rotational drive of the sandwiching unit. The article packaging machine according to any one of 2 to 4.   The article packaging machine according to any one of claims 1 to 5, further comprising a slit opening fan that blows air to open the slit. The belt-like film is provided with a mark for detecting the position in the longitudinal direction, mark detection means for detecting this mark,
The article according to any one of claims 1 to 6, further comprising a film transfer control means for transferring the belt-like film to a predetermined position and stopping it based on the detection result of the mark. Packaging machine. The film sealing mechanism is
A film seal portion for sealing and cutting the slit forming region of the belt-shaped film;
A seal control unit for controlling the operation of the film seal unit,
The film seal is
Film clamping means for clamping the vicinity of the slit forming region of the belt-shaped film;
Film crimping means for crimping and heating the slit forming region;
The film cutting mechanism for cutting the sealed portion along the width direction; and
A cutting part opening means for opening the cutting part by the film cutting mechanism,
The seal control unit operates the film clamping unit and the film pressing unit to heat and press the slit forming region of the belt-like film and perform the cutting action by the film cutting mechanism, and then releases the pressing state of the film pressing unit. The article wrapping machine according to any one of claims 1 to 7, wherein the film seal portion is controlled so that the cutting portion is opened by the cutting portion opening means.   The film crimping means includes a first crimping body and a second crimping body for crimping the slit forming area, and a heater for heating the slit forming area and a film cutting mechanism are incorporated in the first crimping body. The article packaging machine according to claim 8, wherein the article packaging machine is configured to perform heating and cutting simultaneously. The film crimping means includes a first crimping body and a second crimping body for crimping the slit forming region,
The film sandwiching means includes a first sandwiching body and a second sandwiching body that sandwich the slit forming region,
The first clamping body is supported by the first crimping body in a state of being biased in the clamping direction by the first biasing means,
The second clamping body is supported by the second pressing body in a state of being biased in the clamping direction by the second biasing means,
By driving the first crimping body and the second crimping body in the crimping direction by the crimping body driving mechanism, the first sandwiching body and the second sandwiching body are also driven in the same direction, and the first sandwiching body and the second sandwiching body are So that the first and second pressure-bonding bodies are continuously driven against the urging force of the first and second urging means so as to crimp the slit forming region. 9. The article packaging machine according to claim 8, wherein a film seal portion is configured. Each of the first and second sandwiching bodies is provided with a pair of sandwiching action portions so as to sandwich the belt-like film at two locations along the transfer direction,
The said cutting location opening means opens a cutting location by simultaneously driving this pair of clamping action | operation part to a mutually reverse direction in a film transfer direction, The one of Claims 8-10 characterized by the above-mentioned. Goods packaging machine.   12. A driving mechanism for driving the first sandwiching body in the opening direction is provided, and mechanical interlocking means for driving the second sandwiching body in the same direction by driving the first sandwiching body is provided. The article packaging machine described.

Images