JP3032650U - Conveying device for packaged items in heat shrink packaging device - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To convey an object to be packaged in a heat-shrinkable packaging device capable of uniformly heating and shrinking a heat-shrinkable film without biting or pinching of the object to be packaged with a relatively simple structure. I will provide a. SOLUTION: A plurality of cylindrical transfer rollers 12 are attached to a heating chamber 30.
The two frames 16, 16 arranged parallel to each other are rotatably supported between the two frames 16, and the support shaft 1 of each of the transport rollers 12 is also supported.
At least one of the four (14a, 14b) 14a is connected to a drive means so that each of the transport rollers 14 can be rotationally driven. At least one of the transport rollers 12 disposed in the heating chamber 30 is formed of a material having heat resistance and preferably having good peelability from the heat-shrinkable film 20.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for transporting an object to be packaged in a heat-shrinkable packaging device, and more particularly, to a packaged object coated with a heat-shrinkable film in a heating chamber of the heat-shrinkable packaging device by rotation of a transport roller. The present invention relates to a device for conveying a packaged object in a heat-shrinkable packaging device which carries in a package and which is packaged by a heat-shrinkable film that has been heated and shrunk and is discharged from the heating chamber.

[0002]

[Prior art]

 Conventionally, in commercial packaging for miscellaneous goods, foods, etc., industrial packaging such as transportation packaging, collective packaging, etc., a packaged object covered with a heat shrinkable film slightly larger than the packaged object is provided with a heat source such as a heater. Generally, heat shrink wrapping is carried out in which the heat shrinkable film is carried in and passed through the heat shrink wrapping apparatus to heat and shrink the heat shrinkable film so as to be in close contact with the object to be packaged.

At the time of this heat shrink wrapping, in order to heat the heat shrinkable film covering the article to be packaged, the article to be packaged is passed through a heating chamber provided in the heat shrink wrapping apparatus. Various transport devices have been conventionally used as means for transporting objects. 3 and 4 show an example of this carrying device.

The transport device shown in FIG. 3 is arranged between a pair of rails 46, 46 arranged in parallel at a predetermined interval and the chains 42, 42 at a predetermined interval in a direction orthogonal to the chains 42, 42. A plurality of rollers 44 are placed on the rails 46 and 46 at the pin projecting portions of the chains 42 and 42 and rotatably supported, and the ends of the chains 42 and 42 are connected to form an endless ring. The two chains 42, 42 connected to each other in an endless annular shape are connected to a drive means such as a motor and rotated, so that the rollers 44 run on the rails 46, 46, and the rollers 44 There is a transporting device configured to transport the article to be packaged 22 placed on the roller 44 by moving while rotating the vehicle by contact with the rails 46, 46.

Further, in the conveying device shown in FIG. 4, a driving roller 50 and a driven roller 52 which are in pressure contact with the inner circumference of the endless belt 48 are arranged, and the driving roller 50 is rotated by a driving means (not shown). Thus, there is a so-called belt conveyor configured to rotate the endless belt 48 in the direction shown by the arrow in FIG. 4 and convey the article 22 to be packaged placed on the outer circumference of the endless belt 48. .

[0006]

[Problems to be solved by the device]

 In the conveying device using the rollers 44 shown in FIG. 3, the driving means is driven to rotate the chain 42, so that the rollers 44 connected to the chain 42 move as the chain 42 rotates. , The rollers 44 supported by the chains 42 rotate by contact with the rails 46, 46, and the articles 22 to be packed placed on the rollers 44 move in the moving direction of the chains 42. It can be moved at twice the speed.

However, in the transport device having the above-described structure, not only each roller 44 on which the article 22 to be packaged is placed rotates but also moves on the rail 46 together with the chain 42. Therefore, the movement of the packaged object 22 placed on the rollers 44 is relatively unstable, and the displacement of the packaged object 22 and the vicinity of the discharge port 34 of the heating chamber 30 cause the space between the rollers 44 and the rollers. There is a risk that the article to be packaged 22 or fingers may be caught or pinched between the rail 44 and the rail 46, which causes the operation of the entire device to be stopped due to malfunction, and the article to be packaged 22 and the heat-shrinkable film 20 This may cause damage to the heat-shrinkable film 20 and the object to be packaged 22 due to heating for a desired time or longer. In particular, when the roller 44 is heated in the heating chamber 30, the heat-shrinkable film 20 adheres to the surface of the heated roller 44 and is gradually cooled by the outside air near the outlet 34 of the heating chamber 30. Since the heat-shrinkable film 20 is less likely to be peeled off from the roller 44, the heat-shrinkable film 20 attached to the roller 44 drags the packaged object 22 between the rollers 44 or between the roller 44 and the rail 46. Or, the frequency of being pinched increases.

On the other hand, when a belt conveyor as shown in FIG. 4 is used, the conveyed state of the articles 22 to be packaged placed on the outer circumference of the endless belt 48 is stable, and the articles 22 to be packaged on the endless belt 48 are stable. The positional displacement of the object 22 is unlikely to occur, so that there is almost no risk of the object 22 to be packaged or caught. However, since the article to be packaged 22 and the endless belt 48 are in surface contact with each other via the heat-shrinkable film 20, heating of the heat-shrinkable film 20 becomes insufficient at the part in contact with the surface. The heat-shrinkable film 20 in the part is insufficiently heated and shrunk.

Further, when the endless belt 48 is mainly made of a material such as rubber that deteriorates by heating, the life of the endless belt 48 is shortened by heating in the heating chamber 30, and frequent replacement is required.

On the other hand, when the endless belt 48 is made of a metal formed by connecting a plurality of narrow metal plates through hinges to form an endless ring, the problem of deterioration due to heat is solved. However, not only the endless belt 48 itself becomes expensive due to the increase in the number of parts, but also the problem of welding between the heat-shrinkable film 20 heated in the heating chamber 30 and the endless belt 48 remains, and the endless belt is also a problem. The hinge portion 48 causes the heat-shrinkable film 20 that wraps the outer periphery of the article to be packaged 22 to be caught or pinched, which may cause a malfunction of the apparatus.

Further, in any of the above-described transport devices, the roller 44 for mounting the article to be packaged 22 or the endless belt 48 is formed in an endless annular shape, which increases the height of the transport device 10 as a whole, The heat shrinking device incorporating the device 10 becomes large in size, and the increase in the number of parts causes the cost of the device to increase.

In view of the above-mentioned drawbacks of the prior art, the apparatus for transporting an article to be packaged in the heat-shrinkable packaging apparatus of the present invention is capable of heating and shrinking the heat-shrinkable film that covers the bottom of the article to be packaged. A heat-shrinkable packaging device for a heat-shrinkable packaging device that can be performed uniformly, has little biting or pinching of the packaged object by rollers, has high heat resistance, has a small number of parts, and can be made compact. The purpose is to

[0013]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the apparatus for transporting a packaged object in the heat-shrinkable packaging device of the present invention comprises an inlet 32 for introducing a packaged object 22 covered with the heat-shrinkable film 20, and the heat-shrinkable film. A heat-shrinkable packaging apparatus having a heating chamber 30 having a heat source for heating 20 and an outlet 34 for carrying out a packaged object 22 wrapped with the heat-shrinkable film 20 heated and shrunk by the heat source. The two frames 16, 16 arranged in parallel via the both ends of the inlet 32 and the outlet 34 of the heating chamber 30 are projected, and at predetermined intervals in the longitudinal direction of the two frames 16, 16. A large number of cylindrical transfer rollers 12 are rotatably supported, and the transfer rollers 12 are connected to driving means to rotate the transfer rollers 12 in the same direction. Configured to standing, one of the conveying rollers 12, to form formed a conveyance roller 12 disposed in at least a heating chamber 30 in a heat-resistant material.

In the configuration in which the transport roller 12 is rotatable, a plurality of bearings 18 are provided at predetermined intervals in the longitudinal direction of the frames 16 and 16, and the bearings 18 project from both ends of the transport roller 12 in the bearing 18. The support shafts 14 (14a, 14b) are rotatably supported, and at least one of the support shafts 14 (14a, 14b) of the transport rollers 12 is connected to a driving means to rotate the transport rollers 12 in the same direction. It can be configured as possible.

It is preferable that the material of the conveying roller 12 is a material having good heat resistance and peelability from the heat-shrinkable film 20 after heating. Alternatively, a heat resistant synthetic resin material can be used.

Of the bearings 18 provided on the frames 16 and 16 and the support shafts 14 (14a, 14b) supported by the bearings 18, at least the bearings 18 arranged in the heating chamber 30 and It is preferable that the spindle 14 (14a, 14b) is formed of a heat resistant material.

[0017]

[Embodiment of device]

 Next, an embodiment of a device for conveying articles to be packaged in the heat shrink packaging device of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows an overall schematic view of a heat-shrinkable packaging device including a transporting device according to the present invention, and 10 denotes a transporting device for articles to be packaged. The carrying device 10 includes a carrying roller 12 formed in a cylindrical shape, two frames 16 and 16 each having a bearing 18 for bearing a support shaft 14 (14a, 14b) protruding from both ends of the carrying roller 12, Of the support shafts 14 (14a, 14b), the transport roller 12 is connected to a drive shaft 14a projecting from one end side of the transport roller 12 and comprises a rotation driving means (not shown).

In each of the frames 16 and 16, bearings 18 are arranged in parallel in the longitudinal direction at predetermined intervals, and the bearings 18 provided in the frames 16 and 16 protrude from the conveying roller 12. The support shafts 14 (14a, 14b) are rotatably supported so that the above-mentioned transport rollers 12 are arranged in parallel between the frames 16, 16.

The drive shaft 14 a projecting from one end of the carrying roller 12 projects from the side surface of one frame 16, and the drive shaft 14 a is rotated by a driving means such as a motor (not shown) so that each carrying roller 12 is rotated. To rotate.

The drive means preferably fits a pulley or sprocket to the output shaft of a single motor, while fitting a pulley or sprocket to each drive shaft 14 a of the conveying roller 12 to output the output of the motor. Is transmitted to the drive shaft 14a of each of the transport rollers 12, a pulley belt or chain is hung between the pulleys or sprockets, and all the transport rollers 12 rotate in the same direction at the same speed by a driving means such as a single motor. It can also be configured to do so.

The transfer device 10 is arranged so as to penetrate through the heating chamber 30, and both ends thereof are projected from the inlet 32 and the outlet 34 of the heating chamber 30 to the outside of the heating chamber 30. Therefore, the article to be packaged 22 placed on one end of the transport device 10 is carried into the heating chamber 30 through the inlet 32 of the heating chamber 30 as the transport roller 12 rotates, and after passing through the heating chamber 30, It passes through the outlet 34 and is carried out of the heating chamber 30.

As described above, since the carrier device 10 is disposed in the heating chamber 30 and is heated in the heating chamber 30 together with the heat-shrinkable film 20, it is preferable that each part of the carrier device 10 is constituted. Is formed of a heat resistant material. Particularly with respect to the transport rollers 12, when the heat-shrinkable film 20 is heated in the heating chamber 30, the heat-shrinkable film 20 easily adheres to the surface of the transport rollers 12, and the adherence causes the article 22 to be packaged to be caught between the transport rollers 12. In order to prevent the film from being caught or pinched, it is more preferably formed of a resin-based or ceramic-based material that has heat resistance and is peelable from the heat-shrinkable film 20. Further, more preferably, in order to minimize the loss of heat energy and reduce power consumption, in addition to heat resistance and peeling property, a material having a low heat absorption rate and a low specific gravity is used. However, it is not necessary that all of the transport rollers 12 are made of the above-mentioned material, and for example, the surface of the core material made of metal or the like is made of the above-mentioned heat-resistant and peelable resin-based or ceramic-based material. It can also be formed by coating.

For example, engineering plastics such as phenol resin and epoxy resin, and fluororesin such as polytetrafluoroethylene (Teflon TFE: trademark; DuPont) are coated on the metal surface, or the surface of glass cloth is coated with fluororesin. The film is coated, or the surface of the roller is covered with a sheet or a tube obtained by impregnating a glass cloth with a fluororesin.

Further, a support shaft 14 protruding from both ends of the carrying roller 12, a bearing 18 bearing the support shaft 14, a pulley or sprocket fitted to the drive shaft 14 a of the carrying roller 12, the pulley or the pulley or It is preferable that the pulley belt or chain hung on the sprocket is also made of a heat resistant material in consideration of deterioration due to heating in the heating chamber 30.

It should be noted that all of the transport rollers 12 do not have to be made of a material having heat resistance and peelability from the heat-shrinkable film, and they are arranged in the heating chamber 30. Only the above-mentioned material is used, and the other conveyance rollers 12 disposed outside the heating chamber 30 that are not heated at all are heated or heated relatively little. It is also possible to use Similarly, with respect to the bearing 18 arranged on the frame 16, the support shaft 14 supported by the bearing 18, etc., those arranged outside the heating chamber 30 are not necessarily made of a heat resistant material. Not necessary.

An article to be packaged, which is covered with a heat-shrinkable film 20 made of biaxially stretched polyvinyl chloride, polyvinylidene chloride, polyester, polypropylene, polystyrene or the like on the transport device 10 configured as described above. When 22 is placed and the driving means of the conveying device 10 such as a motor is driven, the drive shaft 14a of the conveying roller 12 connected via a pulley, a pulley belt, etc. is rotated and the conveying roller 12 is rotated respectively. Then, the article to be packaged 22 placed on the transport rollers 12 is transported in the rotation direction by the rotation of each of the transport rollers 12 and carried into the heating chamber 30.

The article to be packaged 22 carried into the heating chamber 30 by the transport roller 12 is heated in the heating chamber 30, and the heat-shrinkable film 20 covering the article to be packaged 22 is condensed. . At this time, if the transport roller 12 on which the article to be packaged 22 is placed is made of a material that is heat resistant and has good peelability from the heat-shrinkable film 20 that has been heated, it will not deteriorate due to heat. In addition, the heat-shrinkable film 20 does not cause a malfunction such as the object to be packaged 22 being caught or pinched.

Further, since each of the transport rollers 12 is arranged so as to be separated from the other transport rollers 12 by a predetermined distance, the heat-shrinkable film 20 covering the bottom surface of the article to be packaged 22, that is, the article to be packaged. Heat is evenly applied to the heat-shrinkable film 20 disposed between the transporting device 22 and the transporting device 10, and line contact between the transporting rollers 12 and the article to be packaged 22 is performed. The surface becomes a non-contact surface at any time, and the heat-shrinkable film 20 can be uniformly heat-shrinked.

In this way, the article 22 to be packaged in a state where the heat-shrinkable film 20 covering the surface is shrunk and the heat-shrinkable film 20 is in close contact with the surface is further conveyed by the conveying rollers 12. Then, it is carried out of the heating chamber 30. The article to be packaged 22 carried out of the heating chamber 30 is cooled by the outside air, and the heat-shrinkable film 20 that has contracted is stabilized in a state of being in close contact with the article to be packaged 22, and the packaging of the article to be packaged 22 is completed. .

[0031]

[Effect of device]

 As described above, according to the apparatus for transporting objects to be packaged in the heat-shrinkable packaging apparatus of the present invention, it is possible to provide an inexpensive and small-sized transport apparatus with a simple structure as compared with the conventional transport apparatus. As a result, it is possible to provide a transport device in which the packaged object is not easily caught or pinched, and the heat-shrinkable film has a uniform shrinkage over the entire circumference of the packaged object, so that the packaged object can be packaged beautifully. It has been possible to provide a transporting device for a packaged item in a heat-shrinkable packaging device that can be used.

[Brief description of drawings]

FIG. 1 is a schematic front sectional view of a heat-shrinkable packaging device including a conveying device of the present invention.

FIG. 2 is an enlarged sectional view taken along line II-II of FIG.

3A and 3B are views showing a conventional transfer device, in which FIG. 3A is a schematic front view and FIG. 3B is an enlarged sectional view taken along line BB in FIG. 3A.

FIG. 4 is a schematic front view showing a conventional transfer device.

[Explanation of symbols]

 10 Conveying Device 12 Conveying Roller 14 Spindle 14a Drive Shaft 14b Spindle 16 Frame 18 Bearing 20 Heat Shrinkable Film 22 Packaged Object 30 Heating Chamber 32 Inlet (Heating Chamber) 34 Outlet (Heating Chamber) 42 Chain 44 Roller 46 Rail 48 Endless belt 50 Drive roller 52 Driven roller

Claims (5)

[Scope of utility model registration request] 1. An inlet for carrying in a packaged object coated with a heat-shrinkable film, a heat source for heating the heat-shrinkable film, and a package wrapped with the heat-shrinkable film heated and shrunk by the heat source. In a heat-shrinkable packaging device having a heating chamber provided with an outlet for carrying out a package, two frames arranged in parallel at a predetermined interval are arranged so that both ends thereof are projected from an inlet and an outlet of the heating chamber, A plurality of cylindrical transport rollers are rotatably supported at predetermined intervals in the longitudinal direction of the second frame, and each of the transport rollers is connected to a driving means to be rotatable in the same direction. A transporting device for a packaged item in a heat shrink packaging device, wherein the transport roller arranged in the heating chamber is formed of a heat resistant material. 2. An inlet for carrying in a packaged object coated with a heat-shrinkable film, a heat source for heating the heat-shrinkable film, and a package wrapped with the heat-shrinkable film heated and shrunk by the heat source. In a heat-shrinkable packaging device having a heating chamber provided with an outlet for carrying out a package, two frames arranged in parallel at a predetermined interval are arranged so that both ends thereof are projected from an inlet and an outlet of the heating chamber, A plurality of bearings are provided at predetermined positions in the longitudinal direction at opposed positions of the second frame, and shafts projecting from both ends of the cylindrical conveying roller are rotatably supported by the bearings to convey a large number of frames between the second frames. The rollers are laid horizontally, and at least one of the support shafts of the conveying rollers is connected to a driving means so that the conveying rollers can rotate in the same direction. A conveying device for an article to be packaged in a heat-shrinkable packaging device, wherein the placed bearing, the conveying roller, and a support shaft of the conveying roller are formed of a heat-resistant material. 3. The heat-shrinkable packaging device according to claim 1, wherein at least one of the transport rollers arranged in the heating chamber is made of a material having good peelability from the heat-shrinkable film. For transporting objects to be packaged. 4. The apparatus for conveying articles to be packaged in a heat-shrinkable packaging apparatus according to claim 1, wherein the conveying roller is formed of a ceramic material. 5. The apparatus for conveying an article to be packaged in a heat-shrinkable packaging apparatus according to claim 1, wherein the conveyance roller is formed of a heat-resistant synthetic resin material.