JPH0740409U - Mechanism to prevent the packaged object from sticking out in the packaging machine - Google Patents

Abstract

(57) [Summary] [Structure] Above the horizontal heating member 12, when the heating member moves from the separated state to the abutting state, it is received in the pair of films 4 in the packaging passage 9. An air blowing means 20 for blowing air toward the packaged object 3 is provided. [Effect] While the article to be packaged is sandwiched between the pair of films 4, it descends below the packaging passage 9 and air is sent during the closing of the packaging passage 9, and the air pressure pushes the upper portion of the article downward. To be After that, the film 4 is fused and the blowing of air is completed. Therefore, it is possible to favorably prevent a part of the article to be packaged 3 from protruding from the fusion-bonded portion.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a squeeze-out prevention mechanism for preventing a part of an article to be packaged from protruding in a packaging device for packaging an item to be packaged such as vegetables while forming a packaging film into a bag shape.

[0002]

[Prior art]

 Recently, farmers producing vegetables such as spinach and green onions have come to package and ship vegetables in consideration of keeping freshness, appearance, etc., and as a packaging device therefor, such as Sankai 4-62603 is known. There is.

[0003] This is a bag in which two packaging films are fed out in a packaging passage into which vegetables are placed sideways and the vegetables are sandwiched between the films, and the above-mentioned film is welded so as to surround the vegetables on three sides. It is configured to be taken out after being shaped into a shape. In this case, when the lateral sides of the vegetables are fused at the upper part of the packaging passage by the horizontal heating member, as shown in FIG. 10, a part 41 of the vegetables 40 protrudes from the fusion portion 42 by the horizontal heating members. Occasionally, in this case, the protruding portion 41 is not fused, so that defective packaging occurs. In addition, the fusion portion formed by the horizontal heating member is cut after packaging, but a part of the fusion fusion member is maintained after being cut and forms a part of the bag to be molded next. Will continue to become defective.

[0004]

[The purpose of the device]

 The present invention solves the above-mentioned drawbacks, and provides a mechanism for preventing the protrusion of a packaged item in a packaging device that can reliably package a portion of the packaged item such as vegetables so as not to protrude from the fusion-bonded portion. The purpose is to do.

[0005]

[Means for achieving the purpose]

 In order to achieve the above-mentioned object, a mechanism for preventing a package from protruding in a packaging apparatus according to the present invention includes a packaging passage that allows the package to pass from the upper side to the lower side, and an inside of the packaging passage from both ends of an upper end inlet of the passage. A film feeding means for feeding a pair of roll-shaped films, and a horizontal heating member and a vertical heating member, which are arranged to face each other on both upper sides and one side of the packaging passage, are provided so as to come into contact with and separate from each other. When the members are separated from each other, the pair of films is fed into the packaging passage to receive the object to be packaged between the films, and when the two heating members are in contact with each other, the upper end portion of the packaging passage is provided by the lateral heating member. In the above, the pair of films fed out into the packaging passage are fused and cut along the width direction of the film, and both cut ends are kept fused even after the cutting, and the transverse heating is performed by the longitudinal heating member. In a packaging device in which one side portion along the length direction of a pair of films fed into the packaging passage below the heating member is fused, the heating member is provided above the lateral heating member. An air blowing means for blowing air toward the object to be packaged received in the pair of films in the packaging passage is provided when moving from the separated state to the contact state.

[0006]

[Action]

 According to the above configuration, the vegetables are placed on the pair of films whose ends are fused at the feeding port, the packaged object is sandwiched between the films in the packaging passage, and the horizontal heating member and the vertical heating member are brought into contact with each other to conduct electricity. Then. By heating the transverse heating member, the pair of films are fused and cut at the same time along the width direction above the article to be packaged, and both the cut ends are kept fused even after the cutting. By heating the vertical heating member, the pair of films is fused to the side portions along the vertical direction on the side of the root of the packaged object. In this way, the film is sealed on three sides of the object to be packaged, fused in a bag shape, and cut and taken out. Since the lower end portion of the remaining film is fused, the input port will be blocked in the next packaging step. The above operation is repeated to package the vegetables.

By the way, by the air blowing means provided above the lateral heating member, the heating member is received in the pair of films in the packaging passage when the heating member moves from the separated state to the contact state. Since air is blown toward the packaged object, the packaged object is pressed downward by this air pressure. After that, film fusion is performed.

[0008]

【Example】

 FIGS. 1 and 2 show a vegetable wrapping apparatus. An opening 2 is formed in the central portion of the upper surface of a housing 1. For example, spinach, green onions, komatsuna, and other so-called leafy vegetables 3 are provided. Will be supplied from there.

Reference numeral 4 denotes a pair of roll-shaped wrapping films, which are used as the material of the bag, and are located on the left and right sides of the outside of the inlet 2. Each film 4 is arranged along the front-rear direction, and both ends of the shaft portion 5 of the roll are engaged with U-shaped grooves 7 of a support plate 6 projecting from the upper surface of the housing 1. Further, the film 4 is configured so as to pass through the guide plates 8 arranged on both sides of the input port 2 via the guide rollers and be fed into the packaging passage 9.

As the packaging film 4, an anti-fog film such as centrifugal polypropylene (OPP) prevents the internal fogging caused by the moisture when the vegetables 3 are put inside, and enhances the commercial value. It is preferable in terms of keeping freshness and preventing spoilage.

Rectangular wall members 10 and 11 are arranged opposite to each other on the left and right sides below the inlet 2 of the housing 1, and a packaging passage 9 for the article to be packaged is formed between the wall members 10 and 11. The packaging passage 9 is configured to move in the opening / closing direction by providing the wall members 10 and 11 so as to come into contact with and separate from each other.

As shown in FIG. 2, a horizontal heating member 12 is arranged above the wall members 10 and 11, and a vertical heating member 13 is arranged vertically on one side of the wall members 10 and 11. The horizontal heat member 12 and the vertical heating member 13 are provided with nichrome wires (not shown), and are heated by energizing them. In addition, a sponge-like pressing member 14 is arranged on the side of the vertical heating member 13. Further, the center of the wall members 10 and 11 is formed in a concave shape so that the vegetables 3 can be received therein, and a sponge-like elastic member is also disposed here.

The operation mode of the packaging device will be described. First, when the heating members are separated from each other and the packaging passage 9 is opened, the leading end 4a is fused and the input port 2 is fed out. When the vegetables 3 are placed on the pair of films 4, the pair of films 4 are delivered into the packaging passage 9, the vegetables 3 are sent to the lower side of the packaging passage 9, and the vegetables 3 are received between the films 4. Therefore, the horizontal heating member 12 and the vertical heating member 13 are moved toward each other and brought into contact with each other as shown by the arrow in FIG. 1, and the two heating members are energized. As shown in FIG. 2, a pair of films 4 are fused and cut along the width direction above the vegetables 3 by heating the horizontal heating member 12, and the fusion-bonded portion 15 is cut at both ends even after cutting. The parts remain fused together. By heating the vertical heating member 13, the pair of films 4 is fused below the horizontal heating member 12 to the side portion 16 along the vertical direction on the root side of the vegetable 3. In this way, the film 4 is sealed on the three sides of the vegetable 3 and fused and cut into a bag shape to form a bag having the longitudinal direction of the film 4 as the width direction, and the vegetable 3 is packaged inside. It falls due to its own weight and falls from the packaging passage 9 through the shooter 17 located therebelow. Since the lower end portion of the remaining film 4 is fused, the input port 2 will be blocked in the next packaging step. The above operation is repeated to package the vegetables 3.

The feeding mechanism of the film 4, the driving mechanism of the heating members 12 and 13, the heating timing circuit, and the like may use the configuration shown in Japanese Utility Model Laid-Open No. 4-62603.

By the way, the packaging device is provided with a protrusion preventing mechanism for preventing a part of the leaves of the vegetables 3 from protruding. As shown in FIG. 1, this mechanism includes a blowing nozzle 20 for compressed air, an air compressor 22 connected to the blowing nozzle 20 via an air tube 21, and an on-off valve device 2 for opening and closing the air tube 21. 3 and 3.

The blowing nozzle 20 is arranged above the charging port 2 of the packaging passage 9 and opens toward the charging port 2.

As shown in detail in FIG. 3, the on-off valve device 23 includes an on-off valve 25 fixed to a support member 24 laterally arranged in the housing 1 and an actuator 26 for opening and closing the same. ing. An upper portion 25a of the on-off valve 25 projects upward of the apparatus main body 23a and is provided at a position facing a lower surface of an intermediate portion of an actuator 26 rotatably arranged on the apparatus main body 23a. One end of the actuator 26 is vertically rotatably supported on the upper surface of the valve housing 27, and the roller 27 is attached to the other end. The actuator 26 is always spring-biased upward.

On the other hand, the control plate 28 is fixed to the one wall member 10. At both ends of the control plate 28, upwardly curved guide portions 28a and 28b are formed. The actuator 26 is arranged on the movement locus of the control plate 28. Further, a long hole 29 is formed in the mounting portion of the control plate 28 so that the control plate 28 can be moved and adjusted in the lateral direction.

According to the opening / closing device having the above structure, when the wall members 10 and 11 on both sides are moved toward each other, the roller 27 of the actuator 26 is engaged with the guide portion 28 a of the control plate 28 in the middle of the movement ( (See FIG. 4), the lower surface thereof is guided and pressed downward, which causes the actuator 26 to rotate downward, and the lower surface thereof presses the upper portion 25a of the on-off valve 25 to open the air tube 21. The roller 27 of the actuator 26 is guided by the guide portion 28b on the opposite side of the control plate 28 just before the wall members 10 and 11 on both sides are in contact with each other and the heat members in the vertical and horizontal directions fuse the film 4 to each other. It is set so as to rise again (see FIG. 5), the pressure on the on-off valve 25 is released, and the air tube 21 is closed. When the wall members 10 and 11 move open, the tip 26a of the actuator 26 is bent so that the on-off valve 25 does not operate as shown in FIG. The operation timing of the on-off valve 25 may be adjusted by moving the control plate 28.

As described above, the vegetables 3 are sandwiched between the pair of films 4 and descend to the lower side of the packaging passage 9 to close the packaging passage 9 and the actuator 26 operates to open the opening / closing valve 25 to open the air compressor. Compressed air is sent from 22 and blown out from the blowing nozzle 20. As shown in FIG. 7, the air pressure of the blowing air pushes the upper leaves 3a of the vegetables 3 downward. After that, the film 4 is fused, and at almost the same time, the actuator 26 is re-actuated to close the opening / closing valve 25, and the blowing of air is completed. Therefore, it is possible to favorably prevent the part 3a of the leaf of the vegetable 3 from protruding from the fused portion.

The air blowing direction from the blowing nozzle 20 is not limited to the vertical direction. It is also possible to blow the vegetables 3 obliquely downward from the root side to the leaf tip side.

The items to be packaged are not limited to vegetables. Other types may be used.

FIG. 8 shows another example of the air blowing means in the above-mentioned protrusion prevention device. In this example, the fan 30 and the motor 31 are arranged above the charging port 2, and the motor 31 and the power source are arranged. A limit switch 33 is provided in the circuit connecting with 32, the limit switch 33 is fixed to the support member 34 of the housing 1, and the limit switch 33 is fixed to one wall member 10 in the same manner as the above-mentioned example. The solenoid valve is turned on and off by a valve 28 to operate the solenoid valve.

Further, FIG. 9 shows a structure in which the air from the fan 30 is blown out through the air duct 35, and it may be configured as a blower in this way.

[0025]

【effect】

 According to the present invention, the packaged object is sandwiched between the pair of films and descends below the packaging passage, and air is sent during the closing of the packaging passage, and the air pressure causes the upper part of the packaged article to descend downward. It is pressed. After that, the film is fused and the blowing of air is completed. Therefore, it is possible to prevent the leaf of the packaged part from protruding from the fused portion.

Further, since the film to be bound can be welded immediately above by pressing the object to be bound downward by air pressure, it is possible to reduce the amount of film used.

[Brief description of drawings]

FIG. 1 is a side view of a main part of a packaging device according to the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is an enlarged view of a main part of a protruding device.

FIG. 4 is an explanatory view of an operation mode of the protruding device.

FIG. 5 is an explanatory view of an operation mode of the protruding device.

FIG. 6 is an explanatory view of an operation mode of the protruding device.

FIG. 7 is an explanatory view of an air blowing mode.

FIG. 8 is a side view of another example of the protruding device.

FIG. 9 is a side view of still another example of the protruding device.

FIG. 10 is an explanatory view of a packaging mode by a conventional packaging device.

[Explanation of symbols]

 2 Input port 3 Vegetable (object to be packaged) 4 Film 9 Packaging passage 12 Horizontal heating member 13 Vertical heating member 20 Air blowing nozzle (air blowing means)

Claims (1)

[Scope of utility model registration request] 1. A packaging passage for passing an article to be packaged downward from above, a film feeding means for feeding a pair of roll-shaped films into the packaging passage from both ends of an upper end inlet of the passage, and both sides of the packaging passage. A horizontal heating member and a vertical heating member, which are arranged to face each other on the upper portion and the one side portion, are provided so as to be able to come into contact with and separate from each other, and when the two heating members separate from each other, the pair of films are fed out into the packaging passage and between the films. When receiving the object to be packaged and contacting both heating members, a pair of films fed into the packaging passage at the upper end of the packaging passage by the lateral heating member is fused and cut along the width direction thereof. Then, while maintaining the fusion of both cut ends even after the cutting, the lengthwise direction of the pair of films fed into the packaging passage below the horizontal heating member by the vertical heating member. In a packaging device formed by fusing one side portion along with, a pair of films in the packaging passage above the lateral heating member when the heating member moves from the separated state to the contact state. A squeezing-out prevention mechanism for a packaged item in a packaging device, characterized in that air-blowing means for blowing air toward the packaged item received by the device is provided.