JPH0742963Y2 - Packaging equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a packaging device for packaging an article to be packaged in a heat-sealable film.

[Conventional technology]

Conventionally, in order to wrap an object to be packaged, a bag made of a heat-sealable film is horizontally hung and supported, as proposed in Japanese Utility Model Publication No. S58-45204, and one side of the bag is held in this state. The article to be packaged is accommodated through the opening, and then the opening is heat-sealed.

[Problems to be solved by the device]

In the above-mentioned prior art, since a bag made in advance is used, it is necessary to purchase a commercially available bag, which is expensive, and the opening is opened by a suction member or the like while the bag is suspended and supported. Therefore, there is a problem in that a packaged device must be accommodated in the bag, which requires a complicated device for the bag opening process.

Therefore, by using the two-folding mechanism proposed in Japanese Utility Model Publication No. 52-22525, the belt-shaped film is folded in two by the two-folding mechanism, etc. while continuously pulling out the belt-shaped film forward, and the folded inside of the two-folded belt-shaped film is covered. Contains the packaging,
In addition, it is conceivable that a three-way sealing device including a rear portion, an upper portion, and a front portion is used to perform three-way sealing to form a bag and hermetically seal the packaged object.

However, in the case where the heat-sealing portion is formed by accommodating a food product that is relatively bulky, such as mushrooms, in the bi-fold strip-shaped film in the above-described case, as shown in FIG. It is expected that the film is likely to be loosened, whereby the heat-sealed portion B having the overlapping portion A is formed, and the commercial value is lowered.

Therefore, the applicant of the present invention clamps the upper edge of the front end opening of the tubular film formed by sealing the upper end portion of the double-folded strip-shaped film containing the object to be packaged with a sealing device with a clamping feeding device, and this clamping feeding Sealing and cutting at the rear part while pulling the device toward the saucer in the film advancing direction by the weight of the balance weight, and guiding the cut bag on the saucer by the sandwich feeding device, and Japanese Patent Application No. 63-47305 has proposed a device for preventing loosening.

However, with the lateral width of the front end opening in the advancing direction of the tubular film being wider than the lateral width of the pan, the pinching and feeding device may start the pull-out guide, and in this case, FIG. 16 (A), (B) ), There is a risk that the front end opening of the tubular film C in the advancing direction may be caught by the tray D and the opening may be folded inward to form a disturbed folded portion E. During the operation, the tubular film C may shake laterally. In this case, the tubular film cannot be properly guided to the tray, and it is expected that the subsequent sealing of the front portion will be inconvenient.

In view of this, the present invention provides a packaging device that aligns the front end opening of the tubular film accommodating the object to be packaged so as to fit in the pan and allows the tubular film to be pulled out and guided well along the center position of the pan. With the goal.

[Means for solving problems]

The present invention folds both ends of the strip-shaped film into two by a two-folding device while continuously pulling out the heat-sealable strip-shaped film forward, and guides both ends of the double-folded strip-shaped film upward to guide the two. The object to be packaged is housed in the tri-fold strip film, and the upper part of the bi-fold strip film is sealed to form the film into a tubular shape.
The upper edge of the front end opening of the tubular film in the traveling direction is sandwiched by a sandwiching and feeding device and is drawn out and guided toward a substantially U-shaped saucer, and the rear portion of the tubular film is rearwardly sealed by the rear sealing / cutting device. In the packaging device configured to perform sealing and cutting, and to guide the cut bag to the substantially U-shaped tray provided on the traveling direction side by the sandwiching and feeding device, the rear sealing / cutting device. With respect to at least the front side in the traveling direction of the film, while aligning the lateral width of the traveling direction front end opening of the tubular film guided by the sandwich feeding device so as to fit in the tray,
A pair of left and right elastic regulating members for guiding the tubular film accommodating the object to be packaged along the central position on the pan while always regulating the tubular film containing the object to be packaged while the tubular film is being drawn out and guided. Is.

[Action]

With the above structure, the front end opening in the traveling direction of the tubular film accommodating the object to be packaged is regulated from the left and right to the central direction by the elastic regulating member provided at the front side portion of the film with respect to the rear sealing / cutting device. Therefore, the lateral width of the front end opening in the traveling direction of the tubular film is aligned so as to fit in the pan, and while the tubular film is being drawn out and guided toward the pan, the outer surface of the tubular film is constantly kept by the elastic regulating member. Since it is regulated from the left and right, it is well guided along the central position on the pan.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

In FIGS. 1 to 13, 1 is a machine base, and a roll 3 of a heat-sealable strip-shaped film 2 made of transparent polyethylene, vinyl or the like is rotated on a support plate 4 at the upper rear end of the machine base 1. It is possible. Reference numeral 5 denotes a device for folding the strip-shaped film 2 in front of the roll 3, which supports a bending member 6 having a triangular planar shape.
It is constructed by being mounted in a forward leaning state in which it leans downward as it goes forward through 4A. The bending member 6 has tapered surfaces 7 on both sides which incline inward as it goes upward, and a sharpened portion 8 having a V-shaped side surface at the front end. Further, the bending member 6 is supported at its rear end side through a long hole 9 and a fixing member 10 which can be loosened so that its height can be adjusted, and its front upper surface is pivotally attached by a swingable link arm 12 via a shaft support 11. The angle of inclination of the bending member 6 can be selected by adjusting the height of the rear end side, and by this, the vertical positional relationship of the double-folded band-shaped film 2A can be arbitrarily set. ing. Further, a pair of left and right feed rollers 13 made of a hard elastic material are vertically installed in contact with each other at the front end of the bending member 6. Then, the strip-shaped film 2 continuously drawn out from the roll 3 by means described later is guided to the two-folding device 5 through the plurality of guide rolls 14 and the tension rolls 15, and both side taper surfaces 7 of the bending member 6 are guided.
The two-fold strip-shaped film 2A, which is formed into two folds along the above, is guided to the next step by the rotation of the feed roller 13.

Reference numeral 16 denotes an opening device provided in front of the bi-folding device 5, which is composed of an opening guide plate 17 having an L-shaped cross section, which is placed in parallel with each other at a predetermined interval in parallel to the left and right. Then, the films on both sides of the double-folded strip-shaped film 2A guided by the feed roller 13 are respectively the open guide plates 17
Left and right open guide plates by being sent along the outer surface of
Opening portions 18 are formed at intervals of 17. In this open state, a packaged object 19 made of, for example, enoki mushrooms is manually inserted from the open portion 18 into the half-folded band-shaped film 2A.

Reference numeral 20 denotes an upper sealing device which is horizontally provided in front of the opening device 16, and an upper plate 22 is horizontally mounted above the machine base 1 with a support member 21 interposed therebetween. A pair of heat seal members 23, 2 having a predetermined length corresponding to the product
3A is provided. In this case, one heat seal member 23 is fixed to the upper plate 22, the other heat seal member 23A
Is provided to be able to move forward and backward with respect to the heat seal member 23 by a cylinder 24. Further, the heat seal members 23, 23A are integrally provided with a pair of pinching members 25, 25A, and the heat seal member 23A is provided with a guide rod 26, and the guide rod 26 has a coil spring. 27 is wound. Further, a contact plate 28 is provided on the heat seal member 23A via a leaf spring 29. Then, the cylinder 24 operates in a state where the upper edge of the portion of the double-folded strip-shaped film 2A in which the object to be packaged 19 is accommodated is located between the heat seal members 23, 23A, whereby the heat seal member 23A causes the coil spring 27. While being compressed, it is elastically pressed against the heat-sealing member 23, and the upper edge of the two-fold strip-shaped film 2A is elastically sandwiched by the pair of pressing members 25, 25A. Thus, the tubular film 2B is formed. In this case, the contact plate 28 contacts the heat seal member 23 side and the plate spring 29 is compressed. Therefore, the contact plate 28 is restored and moved forward by the retreat of the heat seal member 23A, and the film 2A is instantaneously released from the heat seal member 23A.

Reference numerals 30 and 31 are paired feed rollers made of elastic members provided at the front and rear ends of the lower surface of the upper plate 22, respectively.
Folded strip-shaped film 2A that has been pulled out of and folded in half
It is designed to be fed in a linear direction while being pinched. And
The feed roller 13 and the feed roller 30 are driven by being connected to a motor 32 via a chain 33 and a sprocket 34, and the feed roller 31 is connected to the feed roller 30 via a belt 35 and a pulley 36, and is driven in synchronization with each other. I am trying to rotate.

Reference numeral 37 denotes a pedestal having a substantially U-shaped cross section, which is arranged on the upper part of the machine base 1 through the opening device 16 and the upper sealing device 20 to the front end position of the upper plate 22 along the film advancing path, The article to be packaged 19 accommodated in the double-fold strip film 2A slides on the pedestal 37 as the film advances.

Reference numeral 38 denotes a rear sealing / cutting device provided in front of the front ends of the pedestal 37 and the upper plate 22. The rear plate 38 is provided at the left and right ends of the machine base 1 in the direction orthogonal to the film advancing direction. Cylinders 40 and 41 are horizontally mounted inside each of the receiving plates 39, and guide rails 42 are provided on the front and rear sides of the upper part and the front side of the lower part between the left and right receiving plates 39, respectively. Further, a pair of moving bodies 43 and 44 are slidably provided on the guide rail 42.

A cutter 46 is attached to one moving body 43 via a rail portion 45 so as to be able to move forward and backward, and a pressing portion is provided on the rear side of the inner surface of the moving body 43.
47 is provided, and the cutter 46 is provided at the center of the moving body 43.
48 is provided, and a heat seal portion 49 is provided on the front side of the moving body 43.
Are provided respectively. Further, a pair of upper and lower guide rods 50 are projected on the outer surface of the cutter 46, a coil spring 51 is wound around the guide rod 50, and the cylinder 40
An engaging member fixed to the end of the guide rod 50, with the upper and lower ends of the pusher 52 slidably fitted to the guide rod 50 so as to face the guide rod 50.
The pusher 52 is stopped by 53. Further, an abutting plate 55 is provided on the front surface of the moving body 43 via a leaf spring 54, and a cooling water circulation path 56 is formed. The circulation path 56 is provided with a cooling water from a water supply pipe 57 by a pump (not shown). Is circulated in the circulation path 56 and then discharged from the drain pipe 58.

The other moving body 44, which is arranged to face the one moving body 43 in a pair, is attached to the cylinder 41, and a clamping portion 47A facing the clamping portion 47 is provided on the rear side of the inner surface of the cylinder 41. The insert groove 59 of the cutter 46 is provided in the central portion, the heat seal portion 49A arranged opposite to the heat seal portion 49 is provided on the front side, and the upper and lower guide rails are provided. A coil spring 60, which is located between the moving bodies 43 and 44 and has a weaker biasing force than the coil spring 51, is wound around 42.

Then, the tubular film 2B is further advanced by a predetermined length from the front end of the pedestal 37 by means described later, and the upper heat seal portion 61 is formed.
The cylinders 40 and 41 operate with the rear end reaching a state corresponding to the rear sealing / cutting device 38. As a result, the piston of the one cylinder 40 pushes the pusher 52, and the pusher 52 elastically moves through the coil springs 51, 60.
Is moved toward the center side, that is, one side surface of the tubular film 2B, and the piston of the other cylinder 41 elastically moves the moving body 44 toward the center side, that is, the other side surface of the tubular film 2B via the coil spring 60. To move. As a result, the two moving bodies 43, 44 come into contact with each other, and in the state where they are sandwiched by the pair of clamping portions 47, 47A at the rear side position of the cutter 46, the cutter 46
The front side of the is heat-sealed by the heat-sealing parts 49, 49A to form the rear heat-sealing part 62, and immediately
46 moves forward against the bias of the coil spring 51, and the insertion groove 59
Is inserted into and cut from the rear part of the rear heat-sealing part 62, and thus the bag-making target 19 is housed in a bag. In this case, the contact plate 55 is in contact with the inner surface of the moving body 44 while the plate spring 54 is compressed. Then cylinder 40,41
When the piston retreats, the moving bodies 43 and 44 and the cutter 46 are returned by the restoring force of the coil springs 51 and 60, and the abutting plate 55 is moved forward by the restoring force of the leaf spring 54, so that the tubular film 2B is instantly moved. Separate from the heat seal portion 49. Further, since the cooling water is circulated in the moving body 43, it is possible to prevent the heat seal portion 49 from being abnormally heated, and as a result, it is possible to prevent melting of the tubular film 2B in advance, and a good seal is obtained. It can be performed. Further, cutting and heat sealing of the tubular film 2B may be performed at the same time, or either cutting or heat sealing may be preceded, which may be arbitrarily selected.

63 is a pinching and feeding device for the tubular film 2B, which has a supporting plate 4B standing upright on the front end of the machine base 1, and a pair of left and right guide rails 64 between the supporting plate 4B and the upper plate 22 for advancing the film. The guide rail 64 is mounted along the direction, and a slide body 65 is slidably provided on the guide rail 64. Further, on the rear side of the sliding body 65, there is provided a pair of sandwiching members 67 which are opened / closed by the operation of the cylinder 68 via the pivotally supporting portion 67A. Also, the upper plate 22
A cylinder 66, which is a means for moving the sliding body 65 along the film advancing direction, is provided on the upper side, and a movable element 69 is provided on the piston thereof.
And the mover 69 is connected to the left guide rail 64.
It is provided slidably on the. Further, one end of a wire 70 is fixed to the sliding body 65, and the wire 70 is guided by a pulley 71 provided at the front end of the machine base 1 and hangs down below the front end of the machine base 1, and a balance weight 72 is provided at the end thereof. Is provided.

Then, in a state where the front end of the tubular film 2B is fed by the feed rollers 13, 30, 31 to a position protruding from the front end of the pedestal 37, the film feeding is stopped, and the piston is contracted by the operation of the cylinder 66, As a result, the sliding body 65 having the sandwiching member 67 is pushed by the mover 69 and the balance weight.
The pair of left and right sandwiching members 67 are located on the left and right side surfaces of the upper edge of the front end opening in the traveling direction of the tubular film 2B with the pair of left and right sandwiching members 67 being opened, against the tensile force due to the load of 72. Here, the clamping member 67 is opened by the cylinder 68 to clamp the upper edge of the front opening of the tubular film 2B in the traveling direction, and the film feeding is started, and the fluid in the cylinder 66 is removed. The sliding body 65 moves forward through the wire 70 by the tensile force due to the load of the balance weight 72, and stops the feeding of the film in a state where the object to be packaged 19 reaches a predetermined position, that is, a position near the rear heat seal portion 62. In this way, in the state where the tubular film 2B is stretched and pulled by the tensile force of the load of the balance weight 72, the rear sealing / cutting device
Performs operation 38. Then, when the rear heat sealing and film cutting of the tubular film 2B guided to be pulled out are performed,
The formed bag 2C is separated from the tubular film 2B, and further moves forward as the sliding body 65 moves due to the tensile force of the balance weight 72. In this case, there is a saucer to be described later below the bag 2C, and the bag 2C is placed on the saucer.

Reference numeral 73 denotes a twisting and front sealing device for the end portion of the bag, which is constructed by using a part of what is proposed by the applicant in, for example, Japanese Utility Model Publication No. 59-35307 and Japanese Utility Model Publication No. 59-35308. There is an endless conveyor 74 provided corresponding to the transfer position of the bag 2C and circulating in a direction orthogonal to the film advancing direction. A pair of front and rear endless chain belts 77A are hung between the conveyor 74 and a sprocket 76 driven by a motor 75 and a sprocket 77 on the driven side, and a plurality of trays 78 are attached to the chain belt 77A at equal intervals. ing. The tray 78 has a U-shaped cross section and is open at both ends forming a film advancing path. Further, flange-shaped stoppers 78B are bent and formed inwardly on both sides of the opening 78A on the film advancing direction side of the tray 78. Further, a heat seal member 80 having a cylinder 79 and a heat seal member 81 are provided as a pair in the vertical direction at the front position of the right transfer end of the tray 78, and the opening / closing operation by the cylinder 82 and the cylinder 83 are provided in front of the heat seal member 80. A rack 84 that is lifted up and down by a plurality of pinching claws 86 that rotate by a pinion 85 are provided. Further, a pair of left and right turn-back guide plates 87 are horizontally arranged corresponding to the upper part of the tray 78 of the film advancing path, and the left turn-back guide plate 87 is moved left and right by the cylinder 87A. Further, above the right transfer end of the tray 78, a deaeration member made of sponge or the like that is moved up and down by a cylinder 88.
89 are provided.

Then, the bag 2C accommodating the object to be packaged 19 is guided onto the saucer 78 and the conveyor 74 is driven after the end of the sandwich is opened, and the conveyor 74 is driven to the right and left by the operation of the cylinder 87A. One of the return guide plates 87 moves. As a result, the excess portion of the upper part of the bag 2C is transferred to the right by the saucer 78 while being folded back to the left by the folding back guide plate 87, and stopped at a position corresponding to the heat seal members 80 and 81, and in this state of the cylinder 88. By the operation, the deaeration member 89 descends to deaerate the inside of the bag 2C, and by the operation of the cylinders 82 and 83, the front excess portion of the bag 2C is clamped by the clamping claws 86 and twisted, and thereafter. The front heat seal part 90 is formed by the heat seal members 80 and 81 by the operation of the cylinder 79, and a product in a three-way sealed state is obtained.

By the way, 91, 91A is a pair of elastic regulating members made of an elastic material such as synthetic resin or metal, and is provided at the ends of the left and right side walls 37A of the pedestal 37 in the film advancing direction, and protrudes in the film advancing direction. Elastic control members 91, 91A tips 92, 9
2A is bent at a height below the tubular film 2B toward the sensor in the film advancing path. Then, the tubular film 2B accommodating the article to be packaged 19 is aligned with the center of the film advancing path by the elastic regulating members 91 and 91A, and the receiving tray 78 is formed.
Guide to the upper center position.

Next, the operation of this embodiment having the above configuration will be described.

First, the band-shaped film 2 is pulled out from the roll 3 and passed through the guide roll 14 and the tension roll 15, and is folded in two from the rear surface of the rear bending member 6 along the tapered surfaces 7 on both sides to the front feed roller 13 Guide in the middle and receive the pedestal there
A pair of left and right open guide plates (17) are set on the upper side of the sheet (37) so that they are sandwiched between the feed rollers (30) and further sandwiched between the feed rollers (31) through the upper sealing device (20).

Here, when the device is driven, the motor 32 detects a colored portion or the like printed on the film at equal intervals by a sensor (not shown), and thereby the bifold belt-shaped film 2A is fed to the feed rollers 13 and 3.
0, 31 drives the bag 2C intermittently at a feed pitch corresponding to the length of the bag 2C, and the motor 75 drives the pan 78 on the film transfer path to a position corresponding to the front seal device 73. It is configured to be driven intermittently by detection of a mitt switch (not shown) at the feeding pitch to be transferred.

The roll 3 is rotated by the rotation of the feed rollers 13, 30, 31.
The strip-shaped film 2 is intermittently pulled out by a predetermined length and is folded in two by the bending member 6, and the double-folded strip-shaped film 2A is provided between the feed roller 13 and the feed roller 30 along the pair of left and right open guide plates 17. The open portion 18 is formed on the upper part and stops. In this state, an object to be packaged 19 such as enoki mushrooms is manually inserted into the half-fold strip-shaped film 2A from the opening portion 18 in accordance with a mark (not shown) marked on the pedestal 37.

Next, the two-fold strip-shaped film 2A progresses intermittently by the feed rollers 13, 30, 31, and the object to be packaged 19 slides on the pedestal 37 and corresponds to the upper sealing device 20 mounted on the upper plate 22. The film progress stops in this state. Here, when the cylinder 24 operates, the heat seal member 23A and the pinching member 2
5A advances toward the heat seal member 23 and the pinching member 25 against the bias of the coil spring 27, and the open edge of the two-fold strip-shaped film 2A on the upper part of the packaged object 19 is pinched by the pinching members 25, 25A. In this state, the heat-sealing members 23 and 23A are heat-sealed to form the upper heat-sealing portion 61 and form the tubular film 2B. In this case, the contact plate 28 is the pressing member 25.
The leaf spring 29 is compressed by coming into contact with the side. And cylinder 24
As the piston shrinks, the heat seal member 23A and the pinching member 25A are retracted by the restoring force of the coil spring 27, and the contact plate 28 is instantaneously projected by the restoring force of the leaf spring 29 to heat the tubular film 2B. Remove from 23A.

Next, the to-be-packaged object 19 is accommodated by the intermittent progress of the film, and the front end opening in the traveling direction of the tubular film 2B in which the upper heat seal portion 61 is formed reaches a state of protruding from the pedestal 37 and the feed roller 31. When it does, the film progress stops.
In this case, in FIGS. 1 to 3 (A) and (B),
As shown in FIG. 1, the front end opening in the traveling direction of the tubular film 2B is regulated from the left and right toward the center by the tip portions 92, 92A provided in the pair of elastic regulation members 91, 91A, whereby the sandwiching member is formed. The upper edge of the front end opening in the advancing direction sandwiched by 67 is aligned with the center position of the film advancing path, that is, the center position of the pan 78, and the lateral width of the front end of the opening is pan 78.
The width can be kept smaller than the width. Here, the cylinder 66 operates and the sliding body 65 moves rearward along the guide rail 64 while resisting the load of the balance weight 72 through the mover 69, and the operation of the cylinder 68 causes the sandwiching member 67 to move.
Is closed to sandwich the upper edge of the front end opening of the tubular film 2B in the traveling direction. (See FIG. 2) Next, the film advance is started, the fluid in the cylinder 66 is drained, and the outer surface of the tubular film 2B is elastically adjusted by the elastic regulating members 91, 91A.
While being regulated from the left and right with the upper edge of the opening being clamped by the clamping member 67, the load of the balance weight 72 pulls it forward through the wire 70 and the sliding body 65 and guides it to the central position on the saucer 78. It (See FIGS. 3 (A) and 3 (B)) In this case, as shown in FIG. 3 (A), the elastic regulating members 91, 91A are located on the tip ends 92, 92A side of the elastic regulating members 91, 91A. When the portion to be packaged 19 passes by elastic deformation, it is expanded outward by the article to be packaged 19, and after the article to be packaged 19 passes, the elastic regulating members 91, 9
The tip portions 92, 92A of 1A return to the center as shown in FIG. 3 (B). After that, when the progress of the film is stopped, the tubular film 2B that has been pulled out is held in a tension state by the tensile force due to the load of the balance weight 72.

Next, when the cylinders 40, 41 of the rear seal / cutting device 38 are operated, the pair of left and right moving bodies 43, 44 are pushed toward the center side along the guide rail 42 against the bias of the coil spring 60.
A tubular film (2B) close to the rear end of the object to be packaged (19) is vertically sandwiched and sealed. In this case, the tubular film 2B is sandwiched by the pair of left and right sandwiching portions 47, 47A, and the front side of this sandwiched portion is heat-sealed by the heat-sealing portions 49, 49A to rear-sealing the tubular film 2B. 62 is formed, and by further pushing the cutter 46 against the bias of the coil spring 51, the cutter 46 cuts the tubular film 2B between the sandwiched portion and the rear heat seal portion 62 to insert the insertion groove. Inserted in 59. The contact plate 55 contacts the pinching portion 47A side while compressing the plate spring 54. As the pistons of the cylinders 40 and 41 are contracted, the pair of left and right moving bodies 43 and 44 and the cutter 46 are restored by the restoring force of the coil springs 51 and 60, and the contact plate 55 is moved to the leaf spring 5.
The tubular film 2B instantaneously separates from the heat seal portion 49 because it returns by the restoring force of 4. Then, along with the cutting of the tubular film 2B, the bag 2C for accommodating the packaged object 19 formed by the two-sided seal is further sandwiched by the sandwiching member 67 by the tensile load of the balance weight 72, that is, at a predetermined position, namely, It is transferred to a predetermined position on the saucer 78, and then the sandwiching member 67.
Is released. In this case, since the bag 2C containing the article to be packaged 19 is pulled in the film advancing direction by the load of the balance weight 72, it is expected that the pulling force will vary, but the balance weight 72 strongly pulls the saucer 78. Even if you try to protrude significantly from the
Is stopped by stopping on the stopper 78B.
Guided upward at a predetermined position, the front surplus portion 2D of the bag 2C projects from the opening 78A of the tray 78 having a predetermined size.

Next, in a state where the film advance is stopped, the motor 75 operates to drive the conveyor 74, and the cylinder 87A operates to fold back the upper surplus portion of the bag 2C via the folding back guide plate 87, and the object to be packaged 19 The tray 78 on which the bag 2C accommodating is placed is moved to a position corresponding to the front sealing device 73 and stopped. In this state, the operation of the cylinder 88 lowers the deaeration member 89 to deaerate the inside of the bag 2C.
The front surplus portion 2D of the bag 2C is clamped and twisted by the clamp claw 86 by the operation of 3, and then the heat seal member 80 descends by the operation of the cylinder 79 to form the front heat seal portion 90. The product is obtained. This product is automatically discharged when the saucer 78 turns downward as the conveyor 74 is driven.

In the above embodiment, with the progress of the two-fold strip film 2A, the object to be packaged 19 is housed in the film 2A, and the tubular film 2B is formed by the upper heat seal portion 61,
When the tubular film 2B in which the object to be packaged 19 is housed is intermittently delivered and the forward end opening in the traveling direction of the tubular film 2B is delivered to the front of the pedestal 37, the forward direction front end of the tubular film 2B. Since the openings are regulated from the left and right toward the center by the pair of guide members 91, 91A, the openings are aligned according to the center position of the film advancing path, that is, the center position of the tray 78, and in this state, the cylinder 66 By this operation, the mover 69 resists the tensile load of the balance weight 72 and the sliding body 65 having the sandwiching member 67 is pushed rearward, and the sandwiching member 67 is positioned at the front end opening in the traveling direction of the tubular film 2B. When it reaches, the upper edge of the front end opening of the tubular film 2B is clamped by the clamping member 67, and then the fluid in the cylinder 66 is drained to apply a forward tensile load by the balance weight 72 to the tubular film 2B. In addition to In the feed rollers 13 and 30,
By rotating 31 the tubular film 2B containing the object to be packaged 19 is received to the predetermined position corresponding to the rear sealing / cutting device 38
While being drawn and guided toward, the outer surface of the tubular film 2B accommodating the object to be packaged 19 is constantly regulated from the left and right to the center position of the saucer 78 by the tip portions 92, 92A of the elastic regulation members 91, 91A. While being forwarded, the front end opening in the film traveling direction of the tubular film 2B is in the form of packaging of the tubular film by the conventional sandwich feeding device.
It is possible to satisfactorily feed it onto the tray 78 without forming a disordered folded portion E as shown in FIGS. 16 (A) and 16 (B). Therefore, the subsequent formation of the front heat seal portion 90 is favorably performed.

As described above in detail, the present invention is stopped when the front end opening in the traveling direction of the tubular film 2B in which the articles to be packaged 19 which are intermittently sent on the receiving table 37 are accommodated protrudes from the receiving table 37. When
It is regulated in the central direction from the left and right by elastic regulating members 91, 91A provided at the front side of the film with respect to the rear sealing / cutting device 38 without expanding the bottom of the front end opening in the traveling direction, and the tubular film 2B The lateral width of the front end opening in the direction of travel is made smaller than the lateral width of the tray 78 so that it can be accommodated in the tray 78, and after sandwiching, the tubular film 2B is drawn out and guided toward the tray 78 by the sandwich feeding device 63. In the meantime, the outer surface of the tubular film 2B in which the object to be packaged 19 is accommodated is always regulated from the left and right by the elastic regulating members 91, 91A, so that the front end opening in the traveling direction of the tubular film 2B is caught by the saucer 78. There is no fear that the part will be folded inward and a disordered folded part will be formed, and lateral shake of the tubular film 2B will be suppressed, and the tubular film 2B will be guided well along the center position on the saucer 78. You can The subsequent sealing of the front end opening in the traveling direction can be favorably performed.

The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention. For example, the type of material to be packaged and the material of the film may be appropriately selected, and the structure of the sealing device may be appropriately selected. Also, although the opening of the bag 2C is configured to be twisted and then heat-sealed, the front heat-sealing portion 90 may be formed by vertically heat-sealing without twisting as shown in FIG. You may Further, as the means for moving the sliding body, the mover may be moved by a chain, a rack, a pinion mechanism, etc. passed to a sprocket instead of the cylinder, and the sandwiching member may be opened and closed by an electromagnetic solenoid. Good. Further, the shape and location of the elastic regulating member may be appropriately selected. For example, FIGS. 14 (A) and 14 (B) show a second embodiment of the present invention. In this embodiment, a pair of elastic regulating members is used. The elastic regulating members 91, 91A are provided between the pedestal 37 and the rear sealing / cutting device 38 so as to stand upright from the machine base 1, and the elastic regulating members 91, 91A formed upright from the machine base 1. The cylindrical film 2B may be aligned toward the center of the pan 78 by means of the above, or, as shown in FIG. 14C of the third embodiment of the present invention, a pair of elastic regulating members 91, 91A. Is not only provided at a position on the front side of the film with respect to the rear sealing / cutting device 38,
It may be provided between the rear sealing / cutting device 38 and the tray 78 together with the front side portion.

The present invention folds both ends of the strip-shaped film into two by a two-folding device while continuously pulling out the heat-sealable strip-shaped film forward, and guides both ends of the double-folded strip-shaped film upward to guide the two. The object to be packaged is housed in the tri-fold strip film, and the upper part of the bi-fold strip film is sealed to form the film into a tubular shape.
The upper edge of the front end opening of the tubular film in the traveling direction is sandwiched by a sandwiching and feeding device and is drawn out and guided toward a substantially U-shaped saucer, and the rear portion of the tubular film is rearwardly sealed by the rear sealing / cutting device. In the packaging device configured to perform sealing and cutting, and to guide the cut bag to the substantially U-shaped tray provided on the traveling direction side by the sandwiching and feeding device, the rear sealing / cutting device. With respect to at least the front side in the traveling direction of the film, while aligning the lateral width of the traveling direction front end opening of the tubular film guided by the sandwich feeding device so as to fit in the tray,
A structure provided with a pair of left and right elastic regulating members for guiding the tubular film accommodating the object to be packaged along the central position on the pan while always regulating the tubular film containing the article to be packaged while the tubular film is being drawn out and guided. Therefore, the advancing direction front end opening of the tubular film accommodating the object to be packaged is regulated in the central direction from the left and right by the elastic regulating member, so that the lateral width of the advancing direction front end opening of the tubular film is in the saucer. The outer surface of the tubular film is adjusted from the left and right sides by the elastic regulation member while the tubular film is pulled out and guided toward the saucer, so it is well aligned along the center position on the saucer. A packaging device capable of guiding can be provided.

[Brief description of drawings]

1 to 13 show a first embodiment of the present invention, FIG. 1 is a perspective view showing the relationship between a tray and an elastic regulating member, FIG. 2 is a sectional view showing the same state, and FIG. ) And (B) are cross-sectional views showing the operating state of the elastic regulating member, FIGS. 4 (A) to 4 (F) are schematic explanatory views showing the packaging process, and FIG. 5 is a longitudinal heat seal of the front heat seal part. FIG. 6 is an overall vertical sectional view, FIG. 7 is an overall plan view, FIG. 8 is a perspective view showing a folding device and an opening device, and FIG. 9 is a perspective view showing an upper sealing device. Fig. 10 is a perspective view showing the rear sealing / cutting device, Fig. 11 is a sectional view of the rear sealing / cutting device, Fig. 12 is a perspective view showing the tensioning device, and Fig. 13 is film folding, degassing and twisting. FIG. 14 (A) is a perspective view showing a rotary sealing device, FIG. 14 (A) is a perspective view of a main part showing a second embodiment of the present invention, and FIG. 14 (B) is a second embodiment of the present invention. FIG. 14 (C) is a plan view of a main part showing a third embodiment of the present invention, FIG. 15 is a front view of a packaging bag showing a conventional packaging form, and FIG. 16 (A). Is a partial cutaway schematic perspective view showing a packaging form in a packaging process of a tubular film by a sandwich feeding device which is an example of a conventional device,
FIG. 16 (B) is a schematic side view showing the packaging form of the tubular film after the operation of FIG. 16 (A). 2 …… Strip film 2A …… Folded strip film 2B …… Cylindrical film 2C …… Bag 5 …… Folding device 19 …… Package 20 …… Top sealing device 38 …… Rear sealing / cutting device 63… … Nipple feeding device 78 …… Saucepan 91, 91A …… Elasticity regulating member

Claims (1)

[Scope of utility model registration request] 1. A heat-sealable strip-shaped film is continuously drawn forward, and both ends of the strip-shaped film are folded in two by a double-folding device, and both ends of the double-folded strip-shaped film are drawn out and guided upward. An object to be packaged is housed in a double-fold strip film, the upper portion of the double-fold strip film is sealed to form the film into a tubular shape, and the upper edge of the front end opening in the traveling direction of the tubular film is pinched and fed by a feeding device. The tubular film is sandwiched and guided toward a substantially U-shaped tray, the rear portion of the tubular film is sealed and cut by the rear sealing / cutting device, and the cut bag is sandwiched and fed by the sandwich feeding device. In a packaging device configured to guide onto the substantially U-shaped saucer provided on the traveling direction side by means of at least a method of advancing the film with respect to the rear sealing / cutting device. At the front side position, the lateral width of the front end opening in the traveling direction of the tubular film guided by the pinching and feeding device is aligned so as to fit in the tray, and the tubular film is guided while being pulled out and guided. A wrapping apparatus comprising a pair of left and right elastic regulating members for guiding a tubular film containing a package along the central position on the tray while always regulating the tubular film from both outer surfaces.