JPS6159963B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a packaging device capable of continuously packaging objects to be packaged while forming a film-like packaging material into a bag-like body.

[Conventional technology]

BACKGROUND ART In recent years, automatic packaging devices in which a film-like packaging material such as a plastic film is continuously formed into a bag-like body while packaging an object have become extremely popular because they can achieve significant labor savings. Examples of such packaging devices are shown in FIGS. 1 and 2.

In FIG. 1, a film bobbin 10 wrapped with packaging material is marked with marks at each length corresponding to the packaging capacity of the packaged object, and the film 12 pulled out from the film bobbin 10 passes through a mark detector 14. After that, it is guided to the pull-out roller 16. The mark detector 14 detects marks placed on a film drawn out by a drive device (not shown), and sends a signal to stop drawing out the film to a control device (not shown).

The film 12 that has passed through the pull-out roller 16 is passed between a pipe-shaped guide 18 and a former 20 to form a cylindrical body, and then the mating portions of the film are adhered by a vertical sealer 22. And the packaged items are
A predetermined amount of the film is transported by the bucket conveyor 24, passed through the hopper 26 and the guide 18, and thrown into a bag-like body 28 formed from the film 12.
Thereafter, the horizontal sealer 30 fuses and seals the upper part of the bag-shaped body 28. At this time, since the horizontal sealer 30 is provided with a cutter 32, when the horizontal sealer finishes sealing and opens the horizontal sealer, the bag-shaped body 28 containing the object to be packaged will open.
falls onto the belt conveyor 35. and,
When the horizontal sealer 30 is opened, a drive device (not shown) drives the pull-out roller 16 and the feed roller 36 provided at approximately the same position as the vertical sealer 22, and the film 1 is moved until the mark detector detects the next mark.
2 from the film bobbin 10. Note that a reference numeral 38 provided between the mark detector 14 and the pull-out roller 16 is a printer for displaying the items to be packaged.

In the packaging apparatus shown in FIG. 2, a sealing device 40 corresponding to the horizontal sealer 30 shown in FIG. 1 moves up and down. That is, when the input detector 42 detects that the article to be packaged has been input into the hopper 26, the control device (not shown) drives the cam 44 shown at the bottom of FIG. Raise the heater box 50. When the horizontal heater box 50 reaches the upper limit position, the upper part of the bag-like body 28 is sealed by the sealer part 54 provided at the tip of the arm 52 via the pair of arms 52 provided at the upper part of the horizontal heater box 50. descend. Along with this, film 12 is
The film will be pulled out from the film bobbin 10.
Then, the mark detector 14 provided at the top of FIG.
detects the mark made on the film 12,
When the detection signal is sent to a control device (not shown), the control device opens the arm 52, stops drawing out the film 12, and removes the sealed bag-like body 28.

[Problem that the invention seeks to solve]

However, in the packaging apparatus shown in FIG. 1, the mark detector 14 detects marks on the film 12 every predetermined length in order to form the bag-like body 28 that matches the packaging capacity of the packaged object. A mark is attached. Therefore, if the packaging capacity differs, the film bobbin 10 must be replaced with a film bobbin 10 wound with adhesive film 12 of each length suitable for the packaging capacity.

Furthermore, the packaging device shown in FIG. 2, like the device shown in FIG. It is also necessary to adjust the film feed amount (drawing amount). Therefore, it is necessary to replace the bobbin every time the packaging capacity of the packaged item differs, which not only reduces work efficiency, but also requires the preparation of various film bobbins, and the need to adjust the film feed rate. This has the disadvantage that the equipment is expensive. Furthermore, the upper limit position of the horizontal heater box 50 must be adjusted in accordance with the packaging capacity of the packaged items.

The present invention has been made in order to eliminate the drawbacks of the prior art, and an object of the present invention is to provide a packaging device that can perform packaging without changing the film bobbin even if the packaging capacity is different. shall be.

[Means for solving problems]

The present invention provides a former for forming a continuously supplied film-like packaging material into a cylindrical body, a vertical sealer for bonding the overlapping portions of the cylindrical body, and a cylindrical body to which the vertical sealer adheres. Along with making it into a bag-like body,
After a predetermined amount of items to be packaged are put into this bag-like body,
In the packaging apparatus, the sealing means includes a pair of brackets which are moved into and out of contact with each other by a driving machine, a heater provided on at least one of these brackets, and a heater provided on at least one of the brackets. A cutter part formed in the center,
a pair of guides that are slidably attached to the bracket and are located above and below the heater; and a pair of guides that are interposed between the pair of guides and the bracket, with each guide facing toward the other bracket. and a spring that normally causes the tip of each guide to protrude from the heater, a lifting means that moves the sealing means up and down, and a lifting means that moves the sealing means up and down, and a spring that causes the tip of each guide to protrude from the heater under normal conditions. is introduced, the pair of brackets are brought close to each other via the driving machine to narrow the upper part of the bag-like body, and the sealing means is lowered by the elevating means to close the bracket to the bag-like body. The packaging apparatus is characterized in that it is provided with a control means for bringing the bag-like body into contact with the object to be packaged through the bag-like body and lowering the bag-like body to a predetermined position in this state.

[Effect]

In the present invention configured as described above, the bag can be sealed while the bracket of the sealing means is in contact with the packaged object through the bag, so there is no need to mark the film-like packaging material. , the same packaging material can be used for packaging according to the packaging capacity. Then, by lowering the bag-shaped body containing the packaged items to a predetermined position using the lifting means driven and controlled by the control unit, the film-shaped packaging material is sequentially fed into the former, and the packaged items are By sealing the loaded bag, the next bag can be formed. Therefore, even if the packaging capacity is different, it is not necessary to replace the film bobbin around which the film-like packaging material is wound, and packaging can be performed continuously.

〔Example〕

A preferred embodiment of the packaging device according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 3 is a front view of an embodiment of the sealing means used in the packaging device according to the present invention.

In FIG. 3, a sealing device 56 as a sealing means has a pair of brackets 58 and 60, and a silicone rubber 62 is embedded in the center of the tip of the bracket 58. On the other hand, in the bracket 60 having a substantially T-shaped cross section, a heat insulating material 64 fixed with bolts or the like is attached to the tip of the horizontal portion 63, and the center part of the surface of the heat insulating material 64, that is, the bracket 58 A heater 66 is attached at a position facing the silicone rubber 62. This heater 66 has a protrusion 68 in the center that serves as a cutter.
is formed so that the sealed bag can be separated.

Further, holes 72 are formed in the upper and lower flange portions 70 of the bracket 60, respectively.
Rods 78 and 79 attached to film guides 74 and 76, respectively, are inserted. The film guides 74 and 76 are biased forward, that is, toward the bracket 58 side, by a spring 80 compressed between them and the flange 70, and normally, the stepped portions 82 and 84 provided on the film guides 74 and 76 are horizontal. It is in contact with the stepped portion of the portion 63. The tips of the film guides 74 and 76 are located in front of the heater 66 as shown in FIG. It is designed to be able to move backward by sliding on each surface.

This sealing device 56 is connected to brackets 58 and 60.
The rear end portions are connected to rods as shown in FIG. 4, and can be moved in the left and right directions in FIG.
The bracket 60 can be moved into and out of contact with the bracket 60. The sealing device 56 also includes a bracket 58,
60 can not only be moved in the horizontal direction in FIG. 3, but also the brackets 58 and 60 can be moved in the vertical direction in FIG. 3 at the same speed by a lifting means (not shown). The elevating means and the cylinder 89 are driven and controlled by a control means, also not shown.

Next, an embodiment of a method for packaging an object using a packaging device having the sealing device 56 described above will be described. Note that the other parts of the packaging device are substantially the same as those described in the prior art, so the description thereof will be omitted.

First, an item to be packaged is selected, and a film bobbin 10 is set in the packaging apparatus as shown in FIG. Then, the heater 66 of the sealing device 56 and the first
A current is applied to the vertical sealer 22 shown in the figure to increase the temperature of the sealer. Next, film bobbin 10
The film 12 is pulled out and guided to the former 20. Then, the pull-out roller 16 and the feed roller 36
are controlled by a drive device (not shown) to make the film 12 into a cylindrical body, and the vertical sealer 22
Glue the joints together.

Next, as shown in FIG. 4, the cylindrical film 12 is lowered to a point where the phototube 86 is placed at the lower limit position of the sealing device 56 at its lower end. is sealed and the excess is cut off. Note that if there is no lower limit position detection device such as phototube 86,
The lower end of the film may be manually lowered below the lower limit position of the sealing device 56.

The sealing device 56, which has completed sealing at the lower limit position, is raised by a distance L as shown in FIG. 4 by the lifting means driven by the control means, and then stops at the upper limit position of the sealing device 56. When it is confirmed that the article to be packaged 88 has been placed into the bag-shaped body 28 by a general method, the control means (not shown) operates the cylinder 89 to close the bracket 58 of the sealing device 56 as shown in FIG. ,60
move forward, that is, move closer to each other. As shown in FIGS. 3 and 5, the brackets 58 and 60 have a distance between the tip of the bracket 58 and the tip of the film guides 74 and 76, which
When the distance d becomes smaller than the distance that 8 can pass, the forward movement is stopped. At this time, the bag-like body 28 is placed on the film guide 7 so as not to come into contact with the heater 66.
Protected by 4.76. Thereafter, the sealing device 56 is lowered by a lifting means (not shown) while maintaining the distance d, and as shown in FIG. A downward force is applied to the bag-shaped body 28 through the packaged object 88, and the film 1
2 from the film bobbin 10, the film is lowered to the lower limit position as shown in FIG.

Thereafter, the control means drives the cylinder 89 so that the brackets 58 and 60 approach each other at the lower limit position, thereby sealing the upper part of the bag-shaped body 28 as shown in FIG. That is, the front end surface of the bracket 58 is connected to the film guides 74 and 76.
After contacting the front end surface of the bracket 58 via the bag-like body 28, the front end surface of the bracket 58 contacts the film guides 74, 7.
6 is pushed backward, and the bag-like body 28 is sandwiched between the silicone rubber 62 and the heater 66. Therefore, the bag-shaped body 28 is fused and sealed by the heat of the heater 66.

When the sealing is completed, the brackets 58 and 60 of the sealing device 56 are retracted as shown by the arrows in FIG. At the same time, a new bag-like body 28 is formed. At this time, the film guides 74 and 76 are urged by the spring 80 and move forward by sliding on the upper and lower surfaces of the horizontal portion 63 of the bracket 60, returning to the state shown in FIG.

The sealing device 56, which has completed sealing at the lower limit position, is moved to the upper limit position by the lifting means when the brackets 58, 60 are opened to the normal position, as shown in FIG. And after that,
The above process is repeated.

As described above, in this embodiment, the sealing device that moves up and down between the upper limit position and the lower limit position comes into contact with the packaged object 88 placed in the bag-shaped body 28 and pulls out the film 12. There is no need for a means to adjust the feed amount of the film 12, and there is no need to attach detection marks to the film.
Therefore, the number of man-hours required to change the film bobbin 10 depending on the packaging capacity of the packaged object can be saved.
Moreover, since the sealing by the sealing device 56 is performed in a state where the sealing device 56 and the object to be packaged 88 are in contact with each other via the bag-like body 28, the object to be packaged can be placed in the storage space of the sealed bag-like body. Since it is stored up to the brim, it is possible to save on packaging materials. In addition, since the sealing device 56 descends at a distance d until it comes into contact with the packaged object, unnecessary air in the bag-like body 28 can be removed, and the cost is reduced in terms of transportation without being unnecessarily bulky. etc. can be achieved.

FIG. 11 is a front view of another embodiment of the sealing device used in the packaging device according to the present invention. The sealing device 90 of this embodiment has detectors 92 and 94 installed at the lower end of the bracket 58 and the lower end of the film guide 76 provided on the bracket 60, respectively, for detecting contact with the packaged object. is provided. The structure of this detector is as shown in FIG. The detector in FIG. 12 shows a detector 92 mounted on bracket 58.
Flanges 96, 9 are provided on both sides of the bracket 58.
8 is formed and the pin 100, 10 has a head larger than the diameter of the hole in the hole bored in the flange.
2 is loosely fitted. And pins 100, 102
A detection bar 104 is fixed to the lower end of the
When the detection bar 104 comes into contact with the object to be packaged 88, it pushes the pins 100, 102 upward. This pin 1
The upward movement of 02 activates a limit switch 106 provided on flange 98.

A packaging method using a packaging device having this sealing device 90 is as follows.

Similar to the above embodiment, the packaged object 8 is placed in the bag-like body 28.
8 is put in, and the brackets 58, 6 of the sealing device 90 are connected via the cylinder by a control means (not shown).
0 moves forward. Similarly to the embodiment described above, when the distance between the end face of the bracket 58 and the end faces of the film guides 74 and 76 becomes d, the bracket 5
8 and 60 stop moving forward, and the sealing device 90 starts lowering. Then, as shown in FIG. 6, when the sealing device 90 comes into contact with the packaged object 88 via the bag-like body 28, the detection bar 104 moves upward, and this movement is transmitted via the pin 102 to the limit switch 1.
Activate 06. When the limit switch 106 is activated, the control means (not shown) advances the brackets 58 and 60 to a position where the sealing device 90 and the object to be packaged 88 are in contact with each other, as shown in FIG. do. Thereafter, the control means lowers the sealing device 90 to the lower limit position while maintaining the sealing state, and as shown in FIG. 9, the brackets 58 and 60 are retracted from the lower limit position to return to the normal position. Then, when the brackets 58 and 60 return to their normal positions, the 10th
As shown in the figure, the sealing device 90 moves to the upper limit position.

In this way, by sealing at the position where the sealing device 90 and the object to be packaged 88 are in contact with each other and moving to the lower limit position in the sealed state, when the object to be packaged is easily damaged. It also becomes possible to package powders, fluids, etc.

In the embodiment, the brackets 58, 60
Although the case has been described in which the actuator is actuated by a cylinder such as hydraulic pressure or air, it may be actuated by other means such as a feed screw mechanism or a rack mechanism.
Furthermore, in the embodiment, the detectors 92, 9
4 describes the case where the limit switch 106 is used, but a piezoelectric element may also be used.

〔Effect of the invention〕

As explained above, according to the present invention, even if the packaging capacity of the items to be packaged differs, they can be easily packaged using packaging materials supplied from the same film bobbin.

[Brief explanation of the drawing]

1 and 2 are explanatory views of a conventional packaging method and packaging device, FIG. 3 is a front view of an embodiment of a sealing device used in the packaging device according to the present invention, and FIGS. 4 to 10 are illustrations of a conventional packaging method and packaging device. An explanatory diagram of a packaging method using a packaging apparatus according to an embodiment of the invention, FIG. 11 is a front view of another embodiment of a sealing device used in the packaging apparatus according to the invention,
FIG. 12 is an explanatory diagram of a detector used in the sealing device shown in FIG. 11, and FIG. 13 is an explanatory diagram of a sealing method using the packaging device having the sealing device shown in FIG. 11. DESCRIPTION OF SYMBOLS 12... Film, 20... Former, 22... Vertical sealer, 28... Bag-shaped body, 56, 90... Sealing device (sealing means), 58, 60... Bracket, 66...
Heater, 74, 76... Film guide, 80... Spring, 88... Item to be packaged, 89... Cylinder (driver).

Claims (1)

[Scope of Claims] 1. A former that forms a continuously supplied film-like packaging material into a cylindrical body, a vertical sealer that adheres the overlapping portions of the cylindrical body, and the cylinder to which the vertical sealer is adhered. In the packaging apparatus, the packaging device is provided with a sealing means for forming a bag-like body into a bag-like body and for fusion-sealing the bag-like body after a predetermined amount of the article to be packaged is put into the bag-like body: The sealing means is , a pair of brackets moved toward and away from each other by a driving machine, a heater provided on at least one of these brackets, a cutter portion formed in the center of the heater, and a cutter portion slidably attached to the bracket and above the heater. and a pair of guides located below the bracket, and are interposed between the pair of guides and the bracket, biasing each guide toward the other bracket, and normally pushing the tip of each guide toward the other bracket. a spring protruding from the heater; and a lifting means for moving the sealing means up and down; and after the object to be packaged is put into the bag-like body, the pair of sealing means are moved through the drive machine. the brackets are brought close to each other to narrow the upper part of the bag-like body, and the lifting means lowers the sealing means to bring the brackets into contact with the object to be packaged through the bag-like body, and A packaging device comprising: control means for lowering the bag-like body in this state to a predetermined position by the elevating means; 2. The sealing means is provided with a detector for detecting contact with the object to be packaged at the lower end of the bracket; the control means drives the driving machine based on a detection signal from the detector. The package according to claim 1, wherein the bag-like body is held between the pair of brackets, and the bag-like body is sealed while driving the elevating means to lower the bag-like body to a predetermined position. Device.