JPH0635105U - Package heating device for bag with header - Google Patents

Abstract

(57) [Summary] [Object] To provide a package heating device that, when providing a header-equipped bag body, keeps the product packaging part in close contact with the product by heat shrinkage while preventing deformation of the header part due to heat shrinkage. [Structure] A header-provided bag body comprising a header portion in which a thick sheet is covered with a non-heat-shrinkable film and a product packaging portion made of a heat-shrinkable film, and both films are joined below the header portion. Is a packaging heating device,
A transport device for suspending and transporting the bag body, a heating device for heating the bag body in the transport process, and a shield for blocking heat generation from the non-heat-shrinkable film of the package body during all steps of passing through the heating device. This is a configuration including a plate and a holder for fixing and holding the shield plate to the header portion of the bag body.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a packaging heating apparatus for a bag with a header, in which a bag is heated by heating the bag while the product is stored in a packaging bag that is a combination of a heat-shrinkable film and a non-heat-shrinkable film. The present invention relates to a device that heat-shrinks only a shrinkable film.

[0002]

[Prior art]

 Conventionally, a packaging bag body in which the entire bag is formed of a heat-shrinkable film is known, and a packaging heating device for this bag body is also known.

[0003] On the other hand, a header-equipped bag body is known in which a header section including a thick sheet is provided on the upper side of a bag body which constitutes a product packaging section by a film, and the header section makes the display convenient. .

[0004]

[Problems to be solved by the device]

 Therefore, in the above-mentioned convenient bag with header for displaying, in order to prevent the product from rattling inside the bag body by holding the product in the packaged state, the bag body should be held. It is easily conjectured that a heat-shrinkable film may be used.

However, when the entire bag body is made of a heat-shrinkable film, the header portion is curved when the entire film shrinks by heating and adheres to the entire circumference of the stored product. However, there is a problem that the display function is distorted and the original display function is impaired.

Further, the conventional header-equipped bag body has a structure in which a thick sheet constituting the header portion is covered with a film constituting the bag, and various printing is performed on the film at the header portion. However, when a bar code or the like is displayed on the printed portion, there is a problem that the code is deformed due to heat shrinkage of the film and an error occurs in reading the code at the time of selling the product.

Therefore, the present inventor has found that the above-described header-equipped bag is formed by combining a heat-shrinkable film and a non-heat-shrinkable film. That is, if a thick sheet is covered with a non-heat-shrinkable film to form a header part and a heat-shrinkable film forms a product packaging part, only the heat-shrinkable film shrinks due to heating. While the non-heat-shrinkable film does not shrink and does not deform the header part, it does not impair the display function of the header part, and the non-heat-shrinkable film that constitutes the header part We have found that it is possible to prevent the reading error of the barcode printed on the shrinkable film.

However, although such a bag with a header can solve the above-mentioned problems, it has been found that the above-mentioned problems cannot be solved by simply using a conventionally known packaging heating device as it is. did. The non-heat-shrinkable film currently on the market has a relatively small shrinkage as compared with the heat-shrinkable film, but the shrinkage is not zero when heated, and exhibits a slight shrinkage phenomenon. . Therefore, when the conventional packaging heating device is used as it is, the entire packaging bag is heated, which causes a slight shrinkage phenomenon in the non-heat-shrinkable film which is not expected to shrink, and the above-mentioned expected I cannot achieve my purpose. That is, conventionally, in the field of packaging, it was thought that the heat shrinkage of the non-heat-shrinkable film was insignificant, but as the purpose of the present invention, the prevention of the distortion of the header portion and the barcode From the viewpoint of prevention of deformation, it was discovered as a result of experimental research that such a slight heat shrinkage is a major obstacle.

[0009]

[Means for Solving the Problems]

 The present invention provides a packaging heating device for a bag with a header, which solves the above-mentioned problems. The means for constructing the packaging heating device is that a thick sheet is covered with a non-heat-shrinkable film 3 in the header portion 25. And a product packaging section 26 constituted by the heat-shrinkable film 2, and the bag body 1 formed by joining the non-heat-shrinkable film 3 and the heat-shrinkable film 2 below the header section 25 is wrapped and heated. Which is a device for carrying a bag 1 containing goods, the carrying device 6 having a hanging rod 27 for carrying the bag 1, a heating device 7 for heating the bag 1 in the above-mentioned carrying process, and the bag body. 1. A blocking device 28 for blocking the heat generated by the heating device 7 from the non-heat-shrinkable film 3 of the package 1 during the entire process of passing through the heating device 7, and a holder 29. 28 is a non-heat-shrinkable film 3 It consists shielding plate for clamping from front and rear of the header portion 25, the retainer 29 is a shielding plate of the header portion 25 sandwiching covering the point formed by fixedly held in the bag 1.

[0010]

【Example】

 An embodiment of the present invention will be described in detail below with reference to the drawings.

As shown in FIG. 1A, the packaging bag body 1 is a bag body that wraps small items and displays them in a hanging manner, and includes a header portion 25 and a product packaging portion 26. The header portion 25 covers the front and back of a thick synthetic resin sheet or synthetic paper with a non-heat-shrinkable film 3, and the film 3 extends slightly below the header portion 25. The product packaging portion 26 is composed of the heat-shrinkable film 2, and is welded to the downward extending portion of the film 3. Therefore, the bag body 1 has a combination portion of the heat-shrinkable film 2 and the non-heat-shrinkable film 3 on the same side surface on each of the front and back side surfaces.

The heat-shrinkable film 2 is a uniaxially stretched or biaxially stretched synthetic resin film and is called a shrink wrapping film (JIS Z1709). On the other hand, the non-heat-shrinkable film 3 is, for example, a synthetic resin film which is generally said to have no heat-shrinkability such as polypropylene or polyethylene, but has a slight shrinkage due to heat.

In the present embodiment, as shown in FIG. 1 (A), the product wrapping portion 26 is formed wider than the header portion 25 in consideration of heat shrinkage of the product wrapping portion 26. Further, the non-heat-shrinkable film 3 forming the header portion 25 is slightly extended below the header portion 25 to form the extension portion 4, and the product packaging portion 26 is formed with respect to the extension portion 4. The heat shrinkable film 2 is welded 8. In addition, the connecting portion of the header portion 25 and the product wrapping portion 26 constituted by the extension portion 4 has tapered side edges 5 and 5 whose side edges are inclined from the header portion 25 to the product wrapping portion 26 in an expanding manner. It is preferable to form them.

As shown in FIG. 1 (B) and FIG. 2, a device for packaging and heating a product in a bag body 1 includes a carrying device 6 for carrying the bag body and a heating device for heating the bag body in the carrying process. A device 7 and a blocking device 28 for blocking the heat generated by the heating device from the non-heat-shrinkable film 3 of the bag body are provided.

The transport device 6 has a pair of rolling wheels 9 and 10 serving as a driving wheel and a driven wheel, and an endless belt 12 is wound around these rolling wheels. A suspending rod 27 is provided on the belt 12 at a predetermined interval, and the bag body 1 is suspended and conveyed by the suspending rod 27.

The heating device 7 is provided in the process of carrying the bag body in the carrying device 6, and includes a heater for heating the top and bottom of the bag body 1 and a heater for heating the left and right sides of the bag body 1. That is, although not shown in the drawing, the heating device 7 has a heating chamber provided in the process of transferring the bag in the transfer device 6, and the bag 1 in the transfer process is heated from above and below in the heating chamber. A heater and a heater that heats from the left and right are provided. As these heaters, a hot air delivery type or an infrared irradiation type is appropriately adopted.

The blocking device 8 includes a shielding plate 28 prepared for each bag 1 and a holder 29. The shielding plate 28 is composed of an openable / closable plate body for sandwiching the head portion 25 covered with the non-heat-shrinkable film 3 of the bag body 1 from the front and back sides, and the holder 29 sandwiches and covers the header portion 25. The means for fixing and holding the shield plate 28 to the bag body 1 is constituted by a clip in the illustrated example. Further, the holder 29 is provided with a holding hole through which the suspension rod 27 of the carrying device 6 is inserted and removed.

Therefore, the shielding plate 28 constitutes a masking means for covering the non-heat-shrinkable film 3 of the bag body 1, and the holding tool 29 connects the masking means (shielding plate 28) to the carrying device 6. A connecting means for fixing is constructed. Further, when the bag 1 is hung and conveyed, the non-heat-shrinkable film 3 on the header portion 25 is entirely masked by the shielding plate 28, while the heat-shrinkable film 2 in the product packaging portion 26 is entirely covered. Will be exposed.

In this embodiment, the suspension rod 27 is rotatable about the vertical axis with respect to the belt 12, and the turning device 30 is provided on the feeding side and the returning side of the conveying device 6. As shown in FIG. 3, the turning device 30 hangs the bag body 1 by a hanging rod 27 to carry the bag body 1 and then turns the hanging rod 27 by 180 degrees so that the belt 12 moves forward at the end side in the traveling direction. The bag body 1 is automatically dropped together with the clip.

Specifically, as shown in FIGS. 3 (A) and 3 (B), control portions 31 a, 31 b, 31 c, 31 d projecting in a star shape are formed on the outer periphery of the suspension rod 27 and are being conveyed. The suspension rod 27 is turned around by colliding with the fixed protrusion 32a.

That is, when the control portion 31 a of the suspension rod 27 that suspends the bag body 1 collides with the fixed protrusion 32 a as indicated by the solid line in FIG. 3A, the suspension rod 27 advances together with the belt 12. Therefore, the control portion 31a is moved by the fixed protrusion 32a, and the suspension rod 27 rotates 90 degrees as indicated by the chain line in FIG. 3 (A).

Further, when the control portion 31b of the suspension rod 27 collides with the next fixed protrusion 32b after traveling with the belt 12, as shown by the solid line state in FIG. The suspension rod 27 further rotates 90 degrees. Therefore, from the state shown by the solid line in FIG. 3A to the state shown by the solid line in FIG. 3B, the suspension rod 27 turns 180 degrees.

Therefore, the L-shaped portion of the suspension rod 27 protrudes in the traveling direction on the front side of the belt conveyance and is inserted into the hole of the clip by this, whereas it rotates 180 degrees on the end side of the belt conveyance. However, when the L-shaped portion of the hanging rod 27 faces the retracting direction in the traveling direction and the bag body 1 inclines toward the end of the belt conveyance, the L-shaped portion of the hanging rod 27 falls off from the L-shaped portion.

Thus, the header-equipped bag 1 heats the entire heat-shrinkable film 2 constituting the product packaging section 26 during the entire process of passing through the heating device 7 when being conveyed by the conveying device 6. The non-heat-shrinkable film 3 forming the header portion 25 is not affected by heat by the shielding device 8 while shrinking to be brought into close contact with the product, and thus is not contracted and deformed. Moreover, since the shielding plate 28 constituting the above-mentioned masking means is connected and fixed to both the non-heat-shrinkable film 3 of the bag body 1 and the carrying device 6 by the holder 29 constituting the connecting means, during transportation. In addition, the shielding plate 28 does not move relative to the bag body 1.

[0025]

[Effect of device]

 According to the present invention, the thick sheet is covered with the non-heat-shrinkable film 3 to form the header portion 25, and the heat-shrinkable film 2 constitutes the product packaging portion 26. Only the shrinkable film 2 is shrunk so that the non-heat shrinkable film 3 does not shrink, so that the header portion 25 is not deformed and the display function of the header portion 25 is impaired. In addition, it is possible to prevent the reading error of the barcode printed on the non-heat-shrinkable film 3 forming the header portion 25.

By the way, according to the present invention, when the header-equipped bag 1 based on the combination of the heat-shrinkable film 2 and the non-heat-shrinkable film 3 is heated, the heat-shrinkable film 2 is heated and shrunk to produce a product. While the non-heat-shrinkable film 3 is prevented from being slightly heat-shrinked by the masking means 28 while it is kept in close contact with the non-heat-shrinkable film 3, the display function by the distortion prevention of the header portion 25 as described above is provided. The effect of maintaining and preventing bar code reading errors can be ensured.

[Brief description of drawings]

1 is a perspective view showing an example of a bag with a header, and FIG. 1 (B) is an explanatory view showing an example of a packaging heating device.

[FIG. 2] A suspension rod for suspending the header-equipped bag during transportation,
It is a vertical side view which shows the Example of a blocking device and a holder.

FIG. 3 is a cross-sectional plan view showing the operation of the suspension rod turning device, in which (A) is a state in which the suspension rod is rotated 90 degrees;
(B) is a cross-sectional plan view showing a state in which the suspension rod is further rotated by 90 degrees.

[Explanation of symbols]

 1 Bag with Header 2 Heat Shrinkable Film 3 Non-Heat Shrinkable Film 4 Extension 5 Tapered Edge 6 Transport Device 7 Heating Device 8 Welding Part 28 Blocking Device 29 Holding Tool

Claims (1)

[Scope of utility model registration request] 1. A header portion 25 in which a thick sheet is covered with a non-heat-shrinkable film 3, and a heat-shrinkable film 2.
And a product packaging section 26 configured by the above, and the non-heat shrinkable film 3 and the heat shrinkable film 2 are attached to the header section 25.
A device for wrapping and heating the bag body 1 that is joined below the bag, the carrying device 6 including a hanging rod 27 for hanging and carrying the bag body 1 containing the product, and the bag body in the carrying process. 1
A heating device 7 for heating the heating device 7;
And a holder 29: the blocking device 28 comprises a shield plate for sandwiching the non-heat-shrinkable film 3 from the front and back of the header portion 25, and the holder 29 sandwiches the header portion 25 for covering the shield plate with a bag. A package heating device for a bag with a header, which is fixedly held on a body 1.