JPH06278722A - Sealer for packing device - Google Patents

Abstract

PURPOSE:To make a choice between double-seal packing and single-open packing only by turning on/off a switch without mechanically switching from one sealer to another. CONSTITUTION:An upper sealing-member 51 is provided with a groove 52 and sealing faces 53 and 58. In the vicinity of the sealing face 53 is a heater 54 for heating this. The sealing face 58 is provided on the end face of a film- pressing metal fitting 57. In the vicinity of the sealing face 58 are heater 59 for heating this and a cooling hole 69 through which a refrigerant for cooling is passed. A lower sealing-member 62 is provided with a groove 63 and sealing faces 64 and 65. In the vicinity of the sealing face 64 is a heater 66 for heating this, and in the vicinity of the sealing face 65 a heater 69 for heating this. Double-seal packing is carried out with the power sources of all the heaters 54, 59, 66 and 69 on. Single-open packing is carried out with the power sources of the heaters 54 and 66 on, the power sources of the heaters 59 and 69 off, and the refrigerant passed through the cooling hole 60.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to two types of seal packaging in which both sides of a bag that wraps a packaged object are sealed, and one sided seal packaging in which only one side of the bag is sealed and one side is open. The present invention relates to a sealing device for a packaging device, which can be selectively applied to the packaging method.

[0002]

2. Description of the Related Art Conventionally, for example, one shown in FIG. 3 is known as a packaging device which can be used for both double-seal packaging and single-open seal packaging. In this device,
The wrapping film 2 for wrapping the packaged object 1 is unrolled by the unrolling roller 5 from the reel 3 wound in a roll, and is introduced into the bag making machine 6 through the guide roller 4. On the other hand, the article to be packaged 1 is fed into the bag making machine 6 at a predetermined interval by the chain blade 11 of the entrance conveyor 10. The packaging film 2 is shaped into a tube in a state where the packaged object 1 is held inside the bag-making device 6, is drawn by the pulling roller 12, and is lengthwise (longitudinal direction) by the vertical sealing roller 13. Edge seal (vertical seal 23 in FIGS. 5 and 6)
It is formed into a tubular shape. Next, it is transferred to the horizontal sealing device 18 by the lead conveyor 9, and the edges in the horizontal direction (short-side direction) on both sides or one side are sealed (the horizontal seal 21 in FIGS. 5 and 6) at the same time. The horizontal sealing device 18 has two pairs of sealers 14, 15, 16 and 17, and the tubular film 2 is fed between the pair of vertically facing sealers 14, 15. As shown in FIG. 4, the sealers 14 and 15 perform a box rotation motion in which the film 2 is sandwiched and contact and separation are repeated. Then, due to the contact between the upper and lower sealers 14 and 15, the film 2 is laterally sealed and cut at the same time to become a packaging bag 19 containing the article to be packaged 1 and transferred to the next step by the exit conveyor 20. .

As shown in FIG. 5, the packaging bag 19 is a double-sealed packaging bag 22 in which both sides are laterally sealed 21 and 21.
And as shown in FIG. 6, only one side is laterally sealed 21
Opening seal packaging bag 2 having an opening 25 formed on one side
There are two types, the horizontal sealing device 18 can select which type of sealing is to be performed. The lateral sealing device 18 will be described in detail with reference to numeral 30 in FIG. In FIG. 2, the horizontal seal device 30 has an upper seal member 31 and a lower seal member 32, and both the upper and lower seal members 31 and 32 are sealers 35 and 36 dedicated to both seals.
And sealers 37 and 38 for exclusive use with single-sided seals.
The sealers 35, 36 and the sealers 37, 38 are arranged 90 ° apart from the central axes 33, 34 of the upper and lower seal members 31, 32, respectively. FIG. 2 shows a sealer combination state in the case of forming both seal packaging bags 22, but the upper and lower seal members 31, 32 are respectively attached to the central shafts 33, 34.
By rotating the sealers 37 and 38 up and down by rotating 90 ° about the center, it is possible to change to a sealer combination state in which the single-open seal packaging bag 24 is formed.

The sealers 35 and 36 for both the seal packaging bags 22 in the horizontal sealing device 30 include a heater 42 for heating the sealing surface 41, a heat pipe 43 for keeping the heating temperature constant, and a temperature for measuring the temperature. A thermocouple 44 is provided. Further, a cutter 45 for cutting the film is provided between the sealing surfaces 41, 41. On the other hand, the sealer 3 for the single-sided seal packaging bag 24
7 and 38 are separated by the central notch grooves 46 and 47, respectively.
A heater 42 for heating the sealing surface 41, and a heat pipe 4 for maintaining a constant heating temperature on one of the divided surfaces.
3. A thermocouple 44 for measuring the temperature is provided, and the other side is provided with a film pressing metal fitting 48 that slides up and down by a built-in spring (not shown). In addition, the cutter 45 for cutting the film is pulled out to a position that does not interfere with the switching operation when switching the sealer,
After switching the sealer, it can be returned to its original position (not shown).

[0005]

However, in the above-mentioned conventional sealing device, when selecting either the double-sided seal packaging or the single-sided seal packaging, it is necessary to rotate the upper and lower sealers about the central shafts 33 and 34, respectively. There is. At that time, there is a problem that an inconvenience such as an incorrect combination of the upper and lower sealers or a forgetting to switch between the upper and lower sealers is likely to occur. Therefore, the present invention eliminates the need for mechanical sealer switching work when selecting either double-seal packaging or single-open packaging to solve the above-mentioned problems, and switches on / off the heater power supply and the seal surface cooling. It is an object of the present invention to provide a sealing device for a packaging device, which can make this selection only by operation.

[0006]

According to the present invention, in order to achieve the above object, a notch groove is provided in the center of an upper seal member, and first and second seals separated by the notch groove are provided. Surface is provided, and the first sealing surface is provided in the vicinity of the first sealing surface.
A first heater for heating the sealing surface of the film is provided, and a second sealing surface is provided on the end surface of the film pressing metal fitting that slides in the vertical direction by a built-in spring. A second heater for heating the sealing surface of the above, and a cooling hole for passing the cooling medium for cooling, and the lower seal member is provided with a notch groove facing the upper notch groove at the center thereof. The third and fourth seal surfaces separated by the above are provided, and the third seal surface is provided in the vicinity of the third seal surface.
Is provided with a third heater for heating the seal surface, and a fourth heater for heating the fourth seal surface is provided in the vicinity of the fourth seal surface to turn on and off the first to fourth heaters. Further, the sealing device for the packaging device is configured so that the feeding and stopping of the refrigerant can be controlled individually.

[0007]

When both seal packaging is performed using the seal device of the present invention, all the first to fourth seal surfaces are heated by turning on the power sources of all the first to fourth heaters. , It is possible to heat weld both sides of the cut portion of the packaging film by the contact of the sealing surface. On the other hand, in the case of single-sided packaging, the power of the first and third heaters facing each other is turned on to heat the first and third sealing surfaces, and the second and fourth heaters are heated. The power of the heater is turned off, and the second sealing surface is cooled by passing the refrigerant through the cooling hole of the film pressing metal fitting. In this case, the film is not heat-welded between the second and fourth seal surfaces, but the film is welded only between the first and third seal surfaces, and the single-sided seal packaging is possible. Therefore, one kind of upper and lower seal members can be used for both double-sided seal packaging and single-sided seal packaging by controlling the heater power on / off, the refrigerant feed / stop.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. FIG. 1 is a side view of a sealing device 50 including upper and lower sealing members 51 and 62, in which the upper sealing member 51 is
A notch groove 52 is provided at the center, and the notch groove 52
It has a first seal surface 53 and a second seal surface 58 which are separated by. In the vicinity of the first seal surface 53,
First heater 5 for heating the first sealing surface 53
4. A heat pipe 55 for keeping the heating temperature constant and a thermocouple 56 for measuring the temperature are provided. Second
The sealing surface 58 of is attached to the tip of the film pressing member 57. The film pressing member 57 is adapted to slide up and down by a built-in spring (not shown). A second heater 59 for heating the second seal surface 58 is provided near the second seal surface 58.
A cooling hole 60 is provided for cooling the sealing surface 58. A cutter 61 for cutting the film is provided at the center of the cutout groove 52.

On the other hand, the lower seal member 62 is provided with a notch groove 63 facing the upper notch groove 52 at the center, and the third seal surface 64 and the fourth seal which are separated by the notch groove 63. And a surface 65. In the vicinity of the third seal surface 64, a third heater 66 for heating the third seal surface 64, a heat pipe 67 for keeping the heating temperature constant, and a thermocouple 68 for measuring the temperature. Is provided. A fourth heater 69 for heating the fourth seal surface 65 and a heat pipe 70 for keeping the heating temperature constant are provided near the fourth seal surface 65. When carrying out both seal packaging using this seal device 50, the first to fourth heaters 54, 59, 6
All the power sources 6, 6 and 69 are turned on to heat all the first to fourth sealing surfaces 53, 58, 64 and 65 so that the film can be heat-welded. On the other hand, when performing the single-sided seal packaging, the first heater 54 and the third heater 66 are turned on to turn on the first and third sealing surfaces 53, 6.
4 is heated, the power supplies of the second heater 59 and the fourth heater 69 are turned off, and water or air is passed through the cooling holes 60 provided in the film pressing fitting 57 to cool the second sealing surface 58. Then, only one side of the film is thermally welded between the first and third sealing surfaces 53 and 64, and the film is not welded between the second and fourth sealing surfaces 58 and 65.

[0010]

As described above, the sealing device for a packaging device of the present invention is one type of upper and lower sealing members, and is controlled by turning on / off the heater power, feeding / stopping the refrigerant, and stopping.
It can be used for both double-sided seal packaging and single-sided seal packaging. Therefore, mechanical sealer switching work becomes unnecessary, and it is possible to eliminate inconveniences such as mistaken combination of upper and lower sealers, forgetting to switch the sealer, etc., and also the structure is simplified to reduce cost. There is an advantage that it can be achieved.

[Brief description of drawings]

FIG. 1 is a side view of a sealing device according to an embodiment of the present invention.

FIG. 2 is a side view of a conventional sealing device.

FIG. 3 is an overall view showing a configuration of a conventional packaging device.

FIG. 4 is a perspective view showing a locus of operation of a conventional sealing device.

FIG. 5 is a perspective view of both seal packaging bags.

FIG. 6 is a perspective view of a one-sided seal packaging bag.

[Explanation of symbols]

50 is a sealing device, 51 is an upper sealing member, 52 is a notch groove, 53 is a first sealing surface, 54 is a first heater, 5
7 is a film pressing metal fitting, 58 is a second sealing surface, 59
Is a second heater, 60 is a cooling hole, 61 is a cutter, and 62
Is a lower seal member, 63 is a notch groove, 64 is a third seal surface, 65 is a fourth seal surface, 66 is a third heater, 6
9 is a fourth heater.

Claims (1)

[Claims] 1. A double-sided seal package and a double-sided seal package can be used as both, and the upper and lower seal members repeat contact and separation of their respective seal surfaces while rotating the boxes, and when the seal surfaces come into contact with each other, a packaging film is formed. In the sealing device for a packaging device that welds and cuts, the upper sealing member is provided with a notch groove at the center, and first and second sealing surfaces separated by the notch groove are provided. In the vicinity of the seal surface, the first
A first heater for heating the sealing surface of the film is provided, the second sealing surface is provided on an end surface of a film pressing metal fitting that slides in the vertical direction by a built-in spring, and the second sealing surface is provided at a position near the second sealing surface. A second heater for heating the second seal surface and a cooling hole for passing a cooling medium are provided, and the lower seal member is provided with a notch groove opposite to the upper notch groove at the center thereof. Third and fourth seal surfaces separated by a notch groove are provided, and a third heater for heating the third seal surface is provided near the third seal surface, and the fourth heater is provided. A fourth heater for heating the fourth seal surface is provided near the seal surface, and the first heater is provided.
To turning on / off the fourth heater and feeding the refrigerant,
A sealing device for a packaging device, characterized in that each stop can be controlled individually.