JPH04132002U - film wrapping machine - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the film from being damaged during packaging, and to limit the number of seals that appear on the packaging surface to one location. [Structure] A film delivery section 21 and a film winding section 33 are arranged on both sides of the product conveyor 26 above and below. The control means 35 for controlling the packaging operation causes the film winding section 33 to wind up a predetermined amount of the film 23 prior to packaging the product 28, and when the product is packaged, the control means 35 causes the film winding section 33 to wind up a predetermined amount of the film 23 from the film winding section 33 to The operation of rewinding a fixed amount of film 23 and the operation of feeding out the film from the film feeding section 21 are performed simultaneously.

Description

[Detailed explanation of the idea]

0001 [Purpose of invention]

0002

[Industrial application field]

This invention relates to a film packaging machine that automatically wraps products using film. Ru.

0003

[Conventional technology]

For example, a film packaging machine having a configuration as shown in FIG. 6 has been conventionally used. This is carried out from the film delivery section 2 installed above the conveyor 1 for transporting the product. The packaging film 3 is sent out downward. Then, the product extrusion cylinder 4 Press the product 5 on the conveyor 1 against the film 3 and move the film 3 along the product 5. By bending it into a U-shape, the product 5 is wrapped in the film 3. Then Sheila After the film 3 is sealed and cut by 6, the remaining seal part 7 is A filter is installed below the conveyor 1 so that it does not appear on the packaging surface of the product. It is wound up by the lume winding section 8.

0004 However, in the case of the above-mentioned film packaging machine, if the corners of the product 5 are sharp, the product 5 is pushed out to the film 3 side by the product extrusion cylinder 4. lume 3 rubs against the corners of product 5, causing scratches, and the quality of the product after packaging is significantly deteriorated. There is a problem that the performance decreases too much.

[0005] Therefore, a film packaging machine having a configuration as shown in FIG. 7 is sometimes used. child In this case, the upper film delivery section 12 provided above the conveyor 11 and the conveyor At the same time, the film 14 is fed from the lower film feeding section 13 provided below the A 11. send out. Then, the product 16 is extruded by the product extrusion cylinder 15, and the product 16 is After wrapping the film 14 with the film 14, the film 14 is sealed with a sealer 17. , disconnected.

[0006]

[Problem that the idea aims to solve]

However, in the configuration of FIG. 7, the upper film delivery section 12 and the lower film delivery section 12 Roll films 12a and 13a must be attached to two locations in section 13, respectively. Therefore, it takes time to replace the roll films 12a and 13a. Moreover, After cutting at the seam 18 between the upper roll film 12a and the lower roll film 13a Since the seal part remains, the seal part appears in two places on the front and back of the product packaging surface, and the outside There is a problem in that it spoils the aesthetic appearance.

[0007] The present invention was made in consideration of the above circumstances, and therefore its purpose is to Not only does replacement take time, there is no film damage during product packaging, and the film is The seal part of the film can only be placed in one place on the product packaging surface, so it does not damage the appearance of the packaging. The present invention provides a film packaging machine.

[0008] [Structure of the idea]

[0009]

[Means to solve the problem]

The film packaging machine of this invention has film delivery sections on both sides of the conveyor for transporting products. A film winding section is arranged, and the film fed out from the film feeding section is placed in front of the film winding section. The products on the conveyor are packaged and sealed, and the sealed part is not separated into upper and lower parts. Cut the sea urchin from the product side and wind up the remaining film with the film winding section. In the device, the control means controls the packaging of the product. Prior to packaging, the film winding section winds up a predetermined amount of film to wrap the product. At times, the operation of rewinding the predetermined amount of film from the film winding section and the operation of rewinding the predetermined amount of film from the film winding section It is configured to simultaneously perform the operation of feeding out the film from the film feeding section. It is characterized by being

0010

[Effect]

Before packaging the product, a predetermined amount of film is rolled up by the film winding unit. It will be done. This predetermined amount of film is unwound from the film winding section during product packaging. At the same time, the film is also fed out from the film feeding section. For this reason, the product Since the film and the film do not rub against each other strongly, damage to the film is prevented.

[0011] Moreover, the seal remaining on the film from the previous packaging will be removed from the film before the next packaging. Since the film is taken up by the film take-up section, there is only one seal that appears on the product packaging surface. . In addition, since the film feeding section only needs to be placed in one location, it is easy to change the film manually. It doesn't take long.

0012

【Example】

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 5. Film advance A delivery section 21 is provided at the lower side of the film packaging machine 22, and this film delivery section 21 is equipped with a roll film 24 made by winding a heat-shrinkable film 23. There is. The film 23 sent out from the film delivery section 21 is arranged in an inclined manner. The feeding direction can be changed by, for example, 90° by the angled guide roller 25, and then, The lower drive roller 27 provided below the conveyor 26 for transporting the product moves the front The conveyor 26 is configured to send the paper upward.

[0013] Furthermore, the film 23 sent out above the conveyor 26 is used to package the product 28. used, and then sealed by a sealer 29 provided above the conveyor 26. It is designed to be connected and disconnected. In this case, the seal portion 30 is separated into upper and lower parts. The seal is cut so that it is connected to the seal that was cut first, and the seal is 30 is driven upward through a guide roller 31 provided above the conveyor 26. The film is wound up by the roller 32 and taken up by the film winding section 33. It has become.

[0014] Further, an encoder 34 is connected to the upper drive roller 32, and this encoder 3 4 is connected to the control means 35. This control means 35 controls when the product 28 is packaged. The direction and amount of rotation of the upper drive roller 32 are controlled, and the lower drive roller 32 is controlled. The amount of rotation of the roller 27 is also controlled.

[0015] On the other hand, as shown in FIG. 2, a heating tunnel is provided on the product exit side of the film packaging machine 22. 36 is provided, and a conveyor 26 passes through this heating tunnel 36. this A heater and a fan (both not shown) are provided in the heating tunnel 36 to generate heat. The wind causes the packaging film of the product 28 on the conveyor 26 to shrink due to heat. ing.

[0016] Next, the operation of the above configuration will be explained. At the conveyor 26 as shown in Figure 3. Before the transported product 28 reaches the packaging position, a predetermined amount L of film 23 is compressed. It is rolled up above the bear 26. This operation is controlled by the control means 35. The upper drive roller 32, the film winding section 33 and the lower drive roller 27 This is done by rotating the rim by a predetermined amount L in the winding direction. In other words, product 28 The length of the film 23 corresponding to the upper circumference excluding the bottom surface is the above-mentioned predetermined amount L. are stored in advance in a storage section (not shown) of the control means 35, and this control means 35 determines the amount of rotation of the upper drive roller 32 based on the output signal of the encoder 34. The amount of pulling up of the film 23 is calculated by cutting, and when this amount of pulling up reaches the above-mentioned predetermined amount L. At this point, the upper drive roller 32 and the lower drive roller 27 are stopped and the film 23 end the raising of

[0017] After this, when the product 28 reaches the packaging position, a product extrusion cylinder (not shown) As shown in FIG. 4, the product 28 is pushed out to the film 23 side. At the time of unloading, a predetermined amount L of film 23 that has been wound up first is transferred to the upper drive roller 3. 2 and the film winding section 33 in the reverse direction. The upper circumferential length of the product 28 is wrapped with the film 23. At the same time as this action , the lower drive roller 27 rotates, and the film 23 is also fed from the film feeding section 21. The bottom surface of the product 28 is wrapped with this film 23.

[0018] When the film wrapping of the product 28 is completed through these series of operations, the film shown in FIG. The sealer 29 descends from above the rear of the packaged product 28 and seals the film 23. The sealing is done by heat fusion, and the product 2 is It is cut from the 8th side.

[0019] The product 28 packaged in this way is packaged so that the film 23 and the product 28 are in close contact with each other. Then, the film 23 is heated in the heating tunnel 36 and becomes thermally shrunk, causing the film to shrink. The link packaging is completed. The film 23 after cutting is used to package the next product. , a predetermined amount L stored in advance in the control means 35 is wound up on the film winding section 33. Thereafter, the above-described operations are repeated to perform shrink wrapping. At this time, volume The amount L of film 23 that is lifted up is such that the remaining seal portion 30 can be used for packaging the next product. This amount was taken into account so that the film would not be used, and in the end, it would not be taken up by the film winding section 33. This seal portion 30 is the only part of the film 23 that is attached.

[0020] According to the embodiment described above, a predetermined amount L of film 23 is placed in advance at the film winding section. 33, and when packaging the product 28, the predetermined amount L of the film 23 is rolled up. from the film winding section 33, and from the film feeding section 21. Since the operation of sending out the product 28 is done at the same time, the corner of the product 28 and the filter are The film 23 does not rub strongly against each other, and the film 23 can be prevented from being scratched.

[0021] Moreover, the seal portion 30 remaining on the film 23 from the previous packaging will be removed before the next packaging. Since the film is wound upright by the film winding section 33, the sheet appearing on the packaging surface of the product 28 is There is only one corner, which gives it a better appearance compared to the conventional model which has two corners. This, together with the damage prevention effect of the film 23 mentioned above, improves the quality of packaging. Wear.

[0022] In addition, since the film feeding section 21 only needs to be provided at one location, the roll film 24 can be replaced in a short time and without any effort. Furthermore, the film is wound on the film winding section 33. Since only the seal portion 30 remaining after cutting the film 23 is removed, The film 23 can be saved and shrink packaging can be performed with less waste.

[0023] In the above embodiment, prior to packaging the product 28, the film is wound on the film winding section 33. The amount of film 23 to be applied is recorded in advance in the control means 35 before packaging the first product. Although it is remembered, it can be changed as follows. In other words, the first product 28 When packaging the product 28, at that time, it is necessary to wrap the upper circumference of the product 28 excluding the bottom surface. An encoder 34 connected to the upper drive roller 32 determines the amount of The amount of film is calculated by measuring the amount of rotation of the roller 32, and this amount of film is stored in the control means 35. let This memorized amount of film 23 is then rolled before the next packaging. Alternatively, the packaging may be repeated from the second item onwards.

[0024] Further, in the above embodiment, the film delivery section 21 is arranged at the lower side of the film packaging machine 22. When replacing the roll film 24 attached to the film delivery section 21, , the conveyor 26 does not get in the way, making it easier to replace the roll film 24. However, the structure in which the film delivery section 21 is provided below the conveyor 26 Even if it is, the intended purpose of the present invention can be achieved.

[0025] Furthermore, the present invention is advantageous in that, for example, the arrangement of the film feeding section 21 and the film winding section 33 is Contrary to this embodiment, the film delivery section 21 is arranged above the product conveyor 26. A configuration may also be adopted in which the film winding section 33 is arranged below.

[0026]

[Effect of the idea]

As is clear from the above explanation, the film packaging machine of the present invention wraps the product first. Stand up and let the film take-up unit take up the specified amount of film, and when packaging the product, The operation of rewinding a predetermined amount of film from the film take-up section and the action of rewinding the film from the film feeding section. Since the film is sent out at the same time, the product and film are strongly It can prevent rubbing against each other, prevent damage to the film, and protect the packaging surface of the product. Only one seal is required, which improves the quality of the packaging.

[0027] Moreover, since only one film feeding section is required, film replacement is easy. It does not take much time and can be done efficiently in a short time.

[Brief explanation of drawings]

[Fig. 1] A schematic perspective view of essential parts showing an embodiment of the present invention.

[Figure 2] Perspective view of film packaging machine

[Figure 3] Diagram showing the first step of product packaging

[Figure 4] Diagram showing the second process of product packaging

[Figure 5] Diagram showing the third step of product packaging

[Figure 6] A perspective view showing a conventional film packaging machine

[Fig. 7] A perspective view showing a conventional improved film packaging machine.

[Explanation of symbols]

21 is a film delivery unit, 22 is a film packaging machine, 26 is a conveyor, 27 is a lower drive roller, 29 is a sealer, 32
33 is an upper drive roller, 33 is a film winding section, 34 is an encoder, and 35 is a control means.

Claims (1)

[Scope of utility model registration request] 1. A film delivery section and a film winding section are arranged on both sides of a conveyor for transporting products, and the product on the conveyor is wrapped and sealed with the film sent out from the film delivery section, and the product is sealed. A film packaging machine comprising a control means for controlling the film to be cut from the product side so as not to separate vertically and the remaining film to be wound up by the film winding section, wherein the control means is configured to Before packaging, the film winding section winds up a predetermined amount of film, and when the product is packaged, the film winding section unwinds the predetermined amount of film, and the film is sent out from the film delivery section. A film packaging machine characterized in that it is configured to perform the following operations at the same time.