JPH0634242Y2 - 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.

[Prior Art] Conventionally, in order to wrap an object to be packaged, a bag made of a heat-sealable film is laterally hung and supported as proposed in Japanese Utility Model Publication No. 58-45204. The article to be packaged is accommodated through the opening on one side of the bag, and then the opening is heat-sealed.

[Problems to be Solved by the Invention] In the above-mentioned conventional technology, since a bag manufactured in advance is used, it is necessary to purchase a commercially available bag, which is costly, and the bag is suspended and supported. There is a problem in that the object to be packaged must be accommodated by opening the opening with a suction member or the like, which requires a complicated device for the bag opening process.

Therefore, using the two-folding mechanism proposed in Japanese Utility Model Publication No. 52-22525, etc., the two-folding mechanism is folded in two while continuously pulling out the strip-shaped film and the top of the two-folded strip-shaped film is opened. It is considered that the article to be packaged is accommodated from the open portion, and then the film containing the article to be packaged is sealed while being fed while being made into a bag to be packaged.

However, in such a case where the strip-shaped film is opened in the middle to store the object to be packaged, it is necessary to support the film so as not to sag in the opening portion in order to perform the subsequent sealing well, and , If the wrapping material has an unstable shape such as mushrooms or is bulky, the wrapping material accommodated from the opening on the upper side of the film floats up and bites between the hanging and feeding members of the film. It is expected that such problems easily occur.

Therefore, an object of the present invention is to provide a wrapping device that can prevent the object to be wrapped from biting into the film hanging and feeding member while favorably supporting the film in the open portion.

[Means for Solving the Problems] The present invention folds both ends of the band-shaped film into two by a bi-folding device while continuously pulling out the heat-sealable band-shaped film to the front, and folds both ends of the band-shaped film upward. Along with the outer surface of the pair of left and right open guide plates provided at a predetermined interval, both end edges of the double-fold strip-shaped film are opened and guided from the inside, and supported in an open state by the open guide plates. In a packaging device in which the article to be packaged is accommodated from the upper open part of the open guide plate in the two-fold band film, and three-way sealing is performed by a three-way sealing device, a two-fold band film is formed at the rear end of the open part. A pair of feed rollers for supporting and transporting the product is provided, and the upper part of the double-folded strip-shaped film in which the object to be packaged is held is pinched to form a pair that is sent in a suspended state. An object to be packaged which is provided with a hanging feed member at the front end of the open portion, and which covers the space between the hanging feed members along the lower surface of at least the open portion side of the pair of hanging feed members along the lower surface of the hanging feed member. The biting prevention member is provided inside the opening.

[Operation] With the above configuration, while the film opening portion is favorably supported by the feeding roller at the rear end and the hanging feeding member at the front end, the object to be packaged accommodated from the opening portion is mediated by the feeding prevention member. It is sent and packaged without being caught between the hanging and feeding members.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIGS. 1 to 9, reference numeral 1 denotes 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 from the roll 3 has a plurality of guide rolls 14
Also, the two-fold belt-shaped film 2A, which is guided to the two-folding device 5 via the tension rolls 15 and is folded in two along the tapered surfaces 7 on both sides of the folding member 6, is formed by folding the two-fold strip film 2A. It is guided to the next process by the rotation of 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 2B on both sides of the double-folded band-shaped film 2A guided by the feed roller 13 are respectively the open guide plates.
By being fed along the outer surface of 17, the open portions 18 are formed at intervals between the left and right open guide plates 17. In this open state, the open part is formed in the two-fold strip film 2A.
A packaged object 19 made of, for example, enoki mushrooms is manually inserted from 18.

In this case, one of the open guide plates 17 is integrally bent at the end on the feed roller 13 side so as to extend in the direction orthogonal to the film advancing direction and across the left and right open guide plates 17. Then, a position guide member 17B for accommodating the article to be packaged 19 is attached and fixed to the attachment piece 17A by a screw 17C so as to be located in the open portion 18. The position guide member 17B has an L-shaped side surface and a trapezoidal front shape, and a long hole 17D is formed in the mounting portion of the screw 17C. The long hole 17D allows the position guide member 17B to move in the film advancing direction. It is formed so that the mounting position can be adjusted. And
When inserting the packaged object 19 from the open portion 18, the packaged object 19 is inserted at a predetermined position of the film 2B in the open state by inserting the packaged object 19 so that the end of the packaged object 19 is substantially along the position guide member 17B. Accurately accommodated in.

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, and the other heat seal member 23A is provided by the cylinder 24 so as to be movable back and forth with respect to the heat seal member 23. Further, the heat seal members 23, 23A are integrally provided with a pair of pressing 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. Is compressed and is elastically pressed against the heat seal member 23, and the upper edge of the double-folded band-shaped film 2A is elastically clamped by the pair of pressing members 25, 25A. Sealed. 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 30,30A, 31, and 31A denote suspension feed rollers that are paired suspension feed members made of elastic material provided at the front and rear ends of the lower surface of the upper plate 22, respectively. The folded strip-shaped film 2A is hung in a pressing state and is fed in a straight line direction. The feed roller 13 and the hanging feed rollers 30, 30A are driven by being connected to a motor 32 via a chain 33 and a sprocket 33A, and the hanging feed rollers 31, 31A connect the feed roller 30, the belt 34, and the pulley 34A. They are connected to each other via a follower to rotate in synchronization with each other.

Reference numeral 35 is a biting prevention member, which is located on the side of the open portion 18 of the hanging feed roller 30, 30A which is the hanging feed member, and is an upper plate.
It is fixed to 22 via screws 36. This bite prevention member
35 has a side surface U-shape, a rectangular mounting piece 35B is bent downward on a horizontal mounting piece 35A, and a triangular receiving piece 35C is horizontally bent on the lower end of the receiving piece 35B. The receiving pieces 35B and 35C are located in the open portion 18 so as to cover the space between the hanging feed rollers 30 and 30A.
It is provided along the lower surface from the front of the open portion 18 side of 30,30A.

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 sealing and cutting device provided in front of the front ends of the pedestal 37 and the upper plate 22. This erected the receiving plates 39 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 receiving plate 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 movably attached to the center of one moving body 43 via a rail portion 45, and a heat seal portion 47 is provided on the rear side of the inner surface of the moving body 43 to seal the moving direction side of the strip film 2A. The moving body 43 is provided with an entrance / exit portion 48 for the cutter 46 at the center thereof, and the strip-shaped film 2A is provided on the front side of the moving body 43.
Heat seal part 49 for sealing the side opposite to the traveling direction of
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 paired with the one moving body 43 is attached to the cylinder 41, a heat seal portion 47A facing the heat seal portion 47 is provided on the rear side of the inner surface of the cylinder 41, and the center portion is provided. An insertion groove 59 for the cutter 46 is provided, and a heat seal portion 49 facing the heat seal portion 49 is provided on the front side.
A is provided respectively, and the upper and lower guide rails 42 are provided.
The coil spring 51 is located between the moving bodies 43 and 44.
A coil spring 60 having a weaker urging force is wound.

Reference numeral 61 is a tension device for the double-folded strip-shaped film 2A, in which a support plate 4B is erected at the front end of the machine base 1, and a pair of left and right guide rails 62 are provided between the support plate 4B and the upper plate 22 in the film advancing direction. The guide rail 62 is mounted along the sliding body 63.
Are slidably provided. Further, on the rear side of the sliding body 63, there is provided a pair of sandwiching members 65 which are opened and closed via a pivotal portion 65A by the operation of the cylinder 64. A cylinder 66 is provided on the upper plate 22 along the film advancing direction, and a mover 67 is connected to the piston of the cylinder 66.
67 is slidably provided on the left guide rail 62. One end of a wire 68 is fixed to the sliding body 63, and the wire 68 is guided by a pulley 69 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 70 is provided at the end thereof. Is provided.

Then, the feed roller 13 and the hanging feed rollers 30, 30A, 3
The front end of the two-fold strip film 2A is pedestal 37 by 1,31A
In the state where the film is fed to the position protruding from the front end of the film, the film feeding is stopped, and the piston is contracted by the operation of the cylinder 66, whereby the sliding body 63 having the clasping member 65.
Is pushed by the mover 67 and moves to the sealing and cutting device 38 side against the tensile force of the balance weight 70, and the left and right side surfaces of the two-fold strip film 2A end with the pair of left and right sandwiching members 65 open. Located in. Here, the cylinder 64 closes the clamping member 65 to clamp the film 2A, and at the same time the film feed is started, the sliding body 63 is pulled by the balance weight 70 by removing the fluid in the cylinder 66. The film is moved forward through the wire 68, and the feeding of the film is stopped in a state where the object to be packaged 19 is pulled out at a predetermined position, that is, a predetermined length of the double-fold strip film 2A. In this way, the sealing and cutting device 38 is operated in a state in which the double-fold strip-shaped film 2A is pulled by the pulling force of the balance weight 70 and is tense. When the heat-sealing points R and F of the two-folded film 2A pulled out and the heat-sealing and film cutting are performed, the bag 2C separated from the two-fold band-shaped film 2A is slidable by the tension force of the balance weight 70. It moves further forward as it moves. In this case, a transport device 71 is provided below the packaged bag 2C, and the packaged bag 2C is placed on the transport device 71. The transport device 71 is provided on an endless conveyor 72 that circulates in a direction orthogonal to the film advancing direction, and the conveyor 72 is a motor.
A pair of front and rear endless chain belts 76 are hung between a sprocket 74 driven by 73 and a sprocket 75 on the driven side, and a plurality of trays 77 are attached to the chain belts 76 at equal intervals. The sealed bag 2C is placed and transported on the.

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 between, and also the pedestal
Place the pair of left and right open guide plates 17 on both sides of the upper guide 37, and then hold them between the hanging feed rollers 30 and 30A, and then put them between the hanging feed rollers 31 and 31A via the upper sealing device 20. Set it to the open state.

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 bi-fold strip film 2A is fed by the feed roller 13 and the hanging feed rollers 30, 30A, 31. , 1 bag by 31A 2
It is driven intermittently with a feed pitch of a length corresponding to the length dimension of C, and the motor 73 moves the pan 77 on the film transfer path to the next pan 77 position corresponding to the moving path of the tensioning device 61. It is configured to be driven intermittently by detection of a limit switch (not shown) at a feed pitch that is set.

Then, the feed roller 13 and the hanging feed rollers 30, 30A, 3
The belt-shaped film 2 is intermittently pulled out by a predetermined length from the roll 3 by the rotation of 1,31A, and is folded in two by the bending member 6, and the double-folded belt-shaped film 2A is fed by the feed roller 13
The open portion 18 is formed in the upper part along the pair of left and right open guide plates 17 between the suspension feed rollers 30 and 30A and stops. In this state, from the open portion 18 into the half-folded band-shaped film 2A, the packaged object 19 such as enoki mushrooms along the position guide member 17B.
Is manually inserted.

Next, the two-fold strip-shaped film 2A advances intermittently by the feed roller 13 and the hanging feed rollers 30, 30A, 31, 31A, and the object to be packaged 19 is the bite prevention member 35 located in the open portion 18.
An upper sealing device mounted on the upper plate 22 after passing through the hanging feed rollers 30 and 30A covered by the above and sliding on the pedestal 37.
Film progress stops in a state corresponding to 20. here,
By operating the cylinder 24, the heat seal member
23A and the pressing member 25A are advanced toward the heat seal member 23 and the pressing member 25 against the bias of the coil spring 27,
The double-folded strip-shaped film 2A on the upper side of the object to be packaged 19 is heat-sealing member 23, 2 with the open edge held by the pressing member 25, 25A.
It is heat-sealed by 3A to form the upper heat-sealed portion S. In this case, the abutment plate 28 abuts against the pressing member 25 side, and the leaf spring 29 is compressed. Then, as the piston of the cylinder 24 shrinks, the heat seal member 23A and the pressing member 25A retreat by the restoring force of the coil spring 27, and the contact plate 28 projects by the restoring force of the plate spring 29 to heat the film 2A.
Remove from 23A.

Next, the front end of the double-folded band-shaped film 2A in which the article to be packaged 19 is accommodated by the intermittent progress of the film and the upper heat-sealed portion S is formed is the upper plate 22 and the suspension feed roller.
When it reaches the state of protruding from 31,31A, the film progress stops. Here, the cylinder 66 operates so that the sliding body 63 moves to the sealing and cutting device 38 side along the guide rail 62 while resisting the load of the balance weight 70 through the mover 67, and at the same time, the sliding operation is performed by the operation of the cylinder 64. The attachment member 65 closes and holds the front end of the double-folded strip-shaped film 2A. Then, the film advance is started, and the fluid in the cylinder 66 is drained and the front end of the double-folded strip-shaped film 2A is attached to the attachment member 65 by the load of the balance weight 70 and forwards through the wire 68 and the sliding body 63. Be pulled. After that, when the film progress is stopped, the two-fold strip-shaped film 2A that has been pulled out is held in a tensioned state by the pulling force of the balance weight 70.

Next, when the cylinders 40 and 41 of the sealing and cutting device 38 are operated, the pair of left and right moving bodies 43 and 44 are pushed toward the center side along the guide rail 42 against the bias of the coil spring 60,
A double-folded strip-shaped film (2A) close to the rear end of the object to be packaged (19) is vertically stuck and sealed. In this case, the front edge of the film 2A that is next drawn out and guided by the pair of left and right heat seal portions 47, 47A is heat-sealed, and the front rear edge seal location R of the front edge seal location F is a pair of heat sealed. It is heat-sealed by the seal portions 49, 49A, and by further pushing the cutter 46 against the bias of the coil spring 51, the cutter 46 is pulled out and guided in the next step. The film 2A is cut between the rear end edge sealing portion R of the strip-shaped film 2A guided by the drawing, and the cutter 46 is inserted into the insertion groove 59. The contact plate 55 contacts the heat seal portion 47A side while compressing the plate spring 54. Since the pair of left and right moving bodies 43, 44 and the cutter 46 are restored by the restoring force of the coil springs 51, 60 and the contact plate 55 is restored by the restoring force of the leaf spring 54 as the pistons of the cylinders 40, 41 are reduced. The film 2A separates from the heat seal part 49. And with the cutting of film 2A, 3
The bag 2C containing the object to be packaged 19 formed by the one-side seal is further transferred to a predetermined position, that is, a position to be placed on the pan 77, while being held by the holding member 65 by the tensile load of the balance weight 70. At the same time, the attachment member 65 is released.

Next, in the state where the film advance is stopped, the motor 73 is operated to drive the conveyor 72, and the tray 77 on which the bag 2C containing the article to be packaged 19 is placed is moved, and the next tray 77 is the tensioning device. It is transferred to a position corresponding to 61 on the moving path and stops. The product in bag 2C packed in this state is on the conveyor.
The tray 77 is automatically carried out when the tray 77 turns downward in accordance with the driving of 72.

As described above, in the above embodiment, the rear end feed roller 1
A film in which the open portion 18 of the film is satisfactorily supported by the 3, 13 and the hanging feed rollers 30, 30A at the front end, and as shown in FIG. Between the hanging feed rollers 30 and 30A for feeding 2A in a suspended state, a biting prevention member 35 is provided in the open portion 18, and the biting prevention member 35 is the hanging feed roller 30, Since it covers between 30A, the open part as shown in Fig. 1 (B)
The object to be packaged 19 accommodated in the film 2A from 18, for example, the enoki mushroom bends upward and its umbrella 19A part hangs the feeding roller 30,
Even if the height reaches 30A, the umbrella 19A part is a bite prevention member.
The guide piece 35 is guided along the receiving pieces 35B and 35C and is housed in the film 2A without being caught between the rollers 30 and 30A, so that the subsequent sealing step can be performed well.

The present invention is not limited to the above embodiment, 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, which is particularly effective for packaging food products. Further, the folding device can be applied to various types such as Japanese Utility Model Publication No. 52-22525. Also, various types of three-sided sealing devices may be appropriately selected. Further, the opening guide plate of the opening device may be bent in a dogleg shape, or both may be connected by a connecting member. The pedestal may be a flat plate or the like. Further, the sealing device for the front edge sealing portion F and the sealing device for the rear edge sealing portion R may be separately provided, and cutting of the film 2A and heat sealing may be performed at the same time.
Alternatively, either cutting or heat sealing may be preceded, and this may be arbitrarily selected.

The biting prevention member may have any structure as long as it is located in the open portion and covers the pair of hanging feed members. For example, it may be formed in a U-shape on the side surface as shown in FIG. Can be selected appropriately.

[Advantages of the Invention] The present invention folds both ends of the band-shaped film into two by a bi-folding device while continuously pulling out the heat-sealable band-shaped film forward, and guides both ends of the double-folded band-shaped film upward. Along the outer surfaces of the pair of left and right open guide plates provided at a predetermined interval, the two-fold strip-shaped film is guided by opening both end edges of the film from the inside, and the two-fold strips supported in the open state by the open guide plates. In a packaging device in which a packaged object is accommodated in the film from the upper open part of the open guide plate, and is three-way sealed by a three-way sealing device, a double-fold strip film is supported and conveyed at the rear end of the open part. A pair of suspending feed members provided with a pair of feed rollers and paired to feed the wrapped product in a suspended state by pressing the upper portion of the double-folded strip-shaped film containing the objects to be packaged. Is provided at the front end of the open portion, and at least the front of the pair of suspending feed members from the front side on the open portion side is covered along the lower surface of the suspending feed member to prevent the bite of the packaged object. By arranging the member in the open part, it is possible to prevent the product to be bitten between the hanging and feeding members while supporting the film in the open part well, and damage the product to be packaged. In addition, the film sealing step can be performed satisfactorily.

[Brief description of drawings]

1 to 9 show an embodiment of the present invention, FIG. 1 (A) is a perspective view showing the relationship between an open portion, a hanging feed member and a bite prevention member, and FIG. 1 (B) is a sectional view. FIGS. 2 (A) to 2 (E) are schematic explanatory views showing the packaging process, FIG. 3 is an overall vertical sectional view, FIG. 4 is an overall plan view, and FIG. 5 is a perspective view showing a folding device and an opening device. FIG. 6 is a perspective view showing an upper sealing device, FIG. 7 is a perspective view showing a sealing and cutting device, FIG. 8 is a sectional view showing a sealing and cutting device, and FIG. 9 is a perspective view of a tensioning device. FIG. 10 is a perspective view showing another embodiment. 2 ... Band-shaped film 2A ... Folded band-shaped film 5 ... Folding device 13 ... Feeding roller 16 ... Opening device 17 ... Opening plywood 18 ... Opening part 19 ... Packaged object 20,38 ... Sealing device 30,30A ... Suspending feed Roller (suspension feed member) 35… Eating prevention member

Claims (1)

[Scope of utility model registration request] 1. A heat-sealable strip-shaped film is continuously drawn out to the front, and both ends of the strip-shaped film are folded in half by a double-folding device, and both ends of the double-folded strip-shaped film are drawn out and guided upward. Along the outer surface of the pair of left and right open guide plates provided at a predetermined interval, both end edges of the two-fold strip-shaped film are opened and guided from the inside,
In the packaging device in which the article to be packaged is accommodated from the upper open portion of the open guide plate in the two-fold strip-shaped film supported in the open state by the open guide plates, and three-way sealing is performed by the three-way sealing device, A pair of hanging feed members that provide a pair of feed rollers that support and convey the two-fold strip-shaped film at the rear end of the open portion and pinch the upper portion of the two-fold strip-shaped film that contains the object to be packaged to feed in a suspended state. Is provided at the front end of the open portion, and at least the front of the pair of suspending feed members from the front side on the open portion side is covered along the lower surface of the suspending feed member to prevent the bite of the packaged object. A packaging device, wherein a member is provided inside the opening.