JPH0589212U - Stretch film wrapping machine - Google Patents

Abstract

(57) [Summary] [Structure] A film cutting cutter 4 is provided behind the heater base 3.
With the support plate 7 projecting upward over substantially the entire width of the base 1.
7 are fixed to the upper surface of the heater base 3, or elongated heater holding cases 5, 5 are attached to support plates 7, 7 ... , 6 are arranged side by side, and at least one rear end of the heater holding cases 5, 5 ... , 6
... is provided with a limit switch for starting the heaters, and the heating of the heaters 6, 6 ... Is stopped after a predetermined time. [Effect] The belt-shaped film 2 is thermally cut in the width direction at once by the film cutting cutter 4, and the film 2 can be freely adjusted according to the size of the article to be packaged 10.
The bottom surface can be partially heat-welded in a short time only by pushing down the packaged article 10 enclosing the package.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a stretch film wrapping device in which a container containing food or fruits and vegetables is wrapped in a stretch film and attached.

[0002]

[Prior Art]

 Conventionally, fresh foods such as fruits, vegetables and fish, or foods packed in containers such as bento and rice balls are wrapped on the outer surface with a stretch film for packaging, and sold with the bottom attached. There is.

However, when a stretch film used in this way can be attached, a vinyl chloride film has self-adhesive properties, so it is possible to attach them on top of each other and to attach cellophane tape. However, in the case of a polyolefin film, since it does not have self-adhesiveness, it cannot adhere to each other, and it is difficult to attach the cellotepe, especially when it contains water, which makes it impossible to attach at all.

[0004]

[Problems to be solved by the device]

 Therefore, the applicant of the present invention has devised a film packaging device (Japanese Patent Application No. 3-87467) that can solve the above problems. This film packaging device uses a cutter for cutting with a heat heater and a heat heater for welding the film, so that not only vinyl chloride film but also stretch film that does not have self-adhesiveness such as polyolefin film is used to wrap food. However, even if it contains moisture on the adhesion surface between the films, it can adhere well, and even when using a roll-shaped stretch film for packaging, this film can be packed and the required amount of This makes it possible to easily and quickly perform the work of cutting the film and the work of attaching the films to each other.

The present invention relates to the improvement of the above invention, and an object of the present invention is to provide a stretch film wrapping machine which simplifies the wrapping work and is superior in workability.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the film packaging apparatus of the present invention is provided in front of the base 1 in a stretch film packaging machine in which a long strip-shaped film 2 is stored in a roll 1 in a roll form so as to be drawn out. At the rear of the heater base 3, a film cutting cutter 4 having a built-in heater wire is provided so as to project upward over substantially the entire width of the base 1, and at least one is fixed to the upper surface of the heater base 3, Are attached to the front and rear of the supporting plates 7, 7 ..., which are slidable in the left-right direction, and the heater holding cases 5, 5 ,. And a plurality of heaters 6, 6 arranged in parallel are projected upward, and at least one rear end of the heater holding cases 5, 5, ... is axially installed on the support plate 7 so as to be able to be pushed and returned. , Holding the heater in the heater holding case 5 Provided with a limit switches for starting the respective heaters 6,6 ... by depressing motion of over scan 5, is obtained by the so that to stop the heaters 6,6 ... Atsushi Nobori after a predetermined time.

Further, the support plates 7, 7, ... May be fixed on the heater table at a predetermined interval.

[0008]

[Action]

 According to the above construction, the film 10 is wrapped with the film 2 while pulling out the front end of the roll-shaped film 2, and the end faces of the film 2 are overlapped with each other on the bottom surface thereof, and the desired position of the film 2 is heated. When it is pressed against the upper end of the cutter 4 for thermal cutting, and then the packaged product 10 is wrapped with the film 2 and is slid onto the heater base 3 and pressed above the heater holding cases 5, 5, ..., The heater holding case 5, The heaters 6, 6 in 5 rise in temperature and the films 2 are partially heat-welded together on the bottom surface of the article to be packaged 10.

In this structure, since the film cutting cutter 4 is provided so as to project upward over substantially the entire width of the base 1, the band-shaped film 2 accommodated in the base 1 can be thermally cut at a stroke in the width direction. The desired film length can be obtained quickly and easily.

Further, at least one of the support plates 7, 7 ... Is fixed to the upper surface of the heater base 3 and the other is slidable in the left and right directions. Therefore, the support plates 7, 7 ... One of the heater holding cases 5, 5 ... Is fixed and the other is movable in the left-right direction, so that the film formed by the heaters 6, 6 ... The heat welding position can be freely adjusted according to the size of the article to be packaged 10.

It is also possible to adopt a configuration in which all of the support plates 7, 7, ... Are fixed to the upper surface of the heater table 3 at a predetermined interval according to the size of the article to be packaged 10. Moreover, since this heat welding is performed by pressing it against the heater holding cases 5, 5, ... Plural elongated heaters 6, 6, ... It is possible to perform concentrated heat welding within a short time.

Further, the heating timing of each of the heaters 6, 6 ... Is started by the pushing-down operation of the heater plate 5 and is automatically stopped after a predetermined time, so that the operator only has to push it. It is possible to achieve an extremely simple heat welding work and at the same time prevent overheating of the heaters 6, 6, ....

[0013]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is an overall perspective view of a stretch film packaging device according to the present invention. FIG. 2 is a sectional view taken along the line AA of FIG. FIG. 3 is a bottom view of the article to be packaged, showing a state in which the article to be packaged is packaged and heat-welded by using the film packaging apparatus of the present invention.

In FIGS. 1 and 2, two film mounting rollers 9, 9 are provided behind the base 1 in the width direction of the base 1 side by side with a predetermined gap in front and back. A long roll 12 of the strip-shaped film 2 is stretched between the rollers 9, 9. Therefore, the roll 12 can freely rotate on the rollers 9 and 9, and the end portion of the film 2 can be pulled out freely.

In front of the roll 12, there is provided a work table 13 whose front portion can be opened and closed upward around the support shafts 13 a and 13 a provided on the side plates 1 a and 1 a of the base 1. At the front end of the workbench 13, L-shaped locking pieces 14c are axially provided 14c on both side plates 1a, 1a, and the top piece 14a is locked to the front edge of the workbench 13 in the closed state. The lower end of the stop piece 14 is pulled by a coil spring 14d to bring it into a locked state, and the top piece 14a is pulled away from the front edge of the workbench 13 so that the workbench 13 can be erected and opened. Further, on the workbench 13, support shaft pieces 15a, 15a fixed to both end portions of the front edge thereof are projected forward, and a rear roller 15 is provided over the entire width of the workbench 13 between the support shaft pieces 15a, 15a. It has been bridged. Immediately before the work table 13, a front roller 16 is mounted between the upper pieces of the support shaft pieces 16a, 16a axially installed inside the side plates 1a, 1a of the base 1. Each of 16a has coil springs 16b, 16b stretched rearwardly on each side plate 1a, 1a. As a result, the front roller 16 is brought into pressure contact with the rear roller 15 by closing the workbench 13, and the front roller 16 is opened by opening the workbench 13 so as to be spaced apart from the rear roller 15.

With such a configuration, the workbench 13 is opened, the film 2 pulled out from the roll 12 is drawn out from between the front and rear rollers 15 and 16 through the lower part of the workbench 13, and then the workbench 13 is closed. Thus, the film 2 is sandwiched between the front and rear rollers 15 and 16.

The folding plate 17 is provided along the entire width of the front roller 16, is made of a stainless plate, and has both ends fixed to both support shaft pieces 16a, 16a of the base 1 and a front edge. And is bent so as to form a flat surface 17a further forward. As a result, the bending of the member of the folding plate 17 is eliminated and the front roller 16 functions as a weighter. That is, when the film 2 sandwiched between the front and rear rollers 15 and 16 is pulled out forward (shown by the chain double-dashed line in FIG. 2) while the workbench 13 is closed, the folding plate 17 is in front of the front roller 16. It plays the role of a weight for biasing the tilt, whereby the front roller 16 can be easily separated from the rear roller 15 against the tensile force of the coil spring 16b, and the film 2 can be pulled out without difficulty. Further, since the flat surface 17a of the folding plate 17 is made smooth, the cut end surface of the film 2 is attached to the flat surface 17a after the film 2 is cut by the cutter 4 described later, and It becomes easy to take out the leading end of the film 2 during the work.

A sloping plate 19 is fixed near the front edge of the bending plate 17 over the entire width between the side plates 1a, 1a of the base 1. The sloping plate 19 is located in front of the sloping plate 19 as a boundary. A rectangular heater base 3 is formed flat.

A cutter 4 is fixedly installed above the tilting plate 19 between the side plates 1a and 1a. This cutter 4 is formed by bending an upper edge of a metal plate to accommodate a nichrome wire (not shown), and an upper end thereof is projected slightly above the uppermost surface of the bending plate 17. A protection plate 19a is formed by bending 19 upward and accommodating the front side surface of the cutter 4. However, the lower part of the tilting plate 19 is opened and separated from the heater table 3.

The heater pedestal 3 has a locking edge 3a bent downwardly along its front edge, and its rear edge is simply cut. On such an upper surface of the heater base 3, two support plates 7 are placed on the upper surface thereof, the front and rear widths of the heater base 3, and the support plate 7 has a downward acute angle along the front and rear edges thereof. By forming the bent pieces 7a and 7b on the rear side and locking the bent pieces 7a and 7b to the front and rear edges of the heater base 3, the support plate 7 can be slidable in the left and right lateral directions of the heater base 3. I am doing it.

However, for example, the left support plate 7 is fixed to the left side of the heater base 3 by means of screws, and the right support plate 7 has the sliding structure as described above so that the distance between the support plates 7 and 7 is large. May be adjusted. It is also possible to adopt a structure in which all of the support plates 7, 7, ... Are fixed to the upper surface of the heater base 3 with screws at a predetermined interval according to the size of the article to be packaged 10. By doing so, the heater holding cases 5 and 5 are adjusted to a predetermined interval, which is convenient for the work of packing and welding the articles to be packed of a fixed shape.

Two rectangular heater holding cases 5 and 5 are attached to the upper surfaces of the support plates 7 and 7, and nichrome wires are built in along the longitudinal direction of the heater holding cases 5 and 5. A plurality (three in FIG. 1) of elongated heaters 6, 6 ... However, the number of heater holding cases 5 installed, that is, the number of support plates 7 installed and the number of heaters 6 installed on one heater holding case 5 is not limited to the above number, and the number is not limited to the above. It can be set according to the size of the accessory 10 and the degree of heat welding.

Of the heater holding cases 5 and 5 as described above, for example, the rear end of the heater holding case 5 on the right side is supported by the support plate 7 so as to be swingable by the shaft 5a, and is elastic by interposing a spring. A limit switch (not shown) is provided in the heater holding case 5 that enables the heaters to be restored and that activates the heaters 6, 6 by pressing the heater holding case 5 and stops the temperature rise after a predetermined time. A timer is provided so that the temperature rise is stopped after a predetermined time when the switch is activated. The swinging structure of the heater holding cases 5 and 5 and the starting structure of the heater 6 may be configured for all the heater holding cases 5 and 5, but as described above, the heater holding case 5 on the right side is provided. Even if it is configured only, its function can be sufficiently fulfilled.

With such a structure, when the heaters 6, 6, ... Are pushed down from above, the heater holding case 5 swings to start heating the heaters 6, 6 ,. It is possible to control so as to automatically stop the temperature rise.

The nichrome wire built in the cutter 4 and the limit switch in the heater holding case 5 are connected to the controller C for temperature adjustment and start adjustment. Although not shown, a power switch, a pilot lamp, and a timer for designating the time from the temperature rise to the stop of the heater are not shown, but may be provided on the inclined plate 19, for example.

In order to wrap the article 10 to be packaged with the film 2 using the film wrapping apparatus configured as described above, the cutter 4 is heated and the article 10 to be packaged is placed on the work table 13. The front end of the film 2 pulled out between the front and rear rollers 15 and 16 is stretched on the workbench 13, and the front end of the film 2 is covered with a margin up to the bottom surface of the article 10 to be packaged on the workbench 3. When the packaged object 10 is pulled out together with the film 2, the film 2 covers the bottom surface of the packaged object 10. Therefore, the packaged object 10 is pulled forward until the film 2 overlaps the bottom surface of the packaged object 10, Pull out 2 and hit the cutter 4 at an appropriate position to heat cut.

Then, the end portions of the film left on the left and right side portions of the packaged article 10 are turned to the bottom surface of the packaged article 10, and the left, right, front and rear edges of the film 2 are packaged as shown in FIG. Make sure that the bottom of item 10 overlaps.

When the bottom surface of the article to be packaged 10 is pressed against the heaters 6, 6 on the heater base 3, the films 2b and 2b on the left and right bottom surfaces of the article to be packaged 10 are heat-welded to each other as shown in FIG. Adhesion is made by the devices 21, 21 ... This heat welding concentrates the partial heat welding of the heaters 6, 6, ..., And enables the heat welding of the film 2 within a short time, which was not possible by the whole surface welding.

Although the above description has described the method of packaging a rectangular packaged item, the same can be done even when the packaged item is a square, and also if it is a spherical item such as a fruit or vegetable. Can be packaged in

Further, according to the experimental results, even if the bottom surface of the packaged product contains water, that is, even if the film-adhering part contains water, it is well heat-welded without any influence. It is confirmed to get.

[0032]

As described above, since the stretch film wrapping device of the present invention wraps the article to be packaged and partially heat-bonds the film laminated on the bottom surface thereof with the heater, the entire surface heat wrapping is performed. Unlike welding, it is possible to perform heat welding of the required minimum area within a short period of time, and not only can you attach any vinyl film, but also of course self-adhesive polyolefin film, etc. can do. Therefore, even if the film-attached surface contains moisture, it can be attached without being affected by this, and even if the food product of water is wrapped in a film, it can be attached well. ..

Particularly, in the present invention, one of the heater holding cases 5, 5, ... On the upper surface of the heater base 3 can be fixed, and the installation width of the other heater holding cases 5 can be easily adjusted. Accordingly, all of the heater holding cases 5, 5, ... Can be fixed in advance at a predetermined interval according to the size of the product to be packaged. By doing so, it is possible to perform packing and welding work of the product to be packaged of a fixed shape. It will be convenient.

Further, even if the adhering surface contains moisture, it can be adhered without being affected by this, so that it can be adhered well even when a food product of water is wrapped in a film. You can

Further, since the cutter 4 and the heaters 6, 6, ... Are sequentially arranged side by side from the rear to the front, the cutting operation and the sticking operation of the film can be performed quickly by a continuous work, Workability becomes extremely good.

Furthermore, since starting and stopping of the heater are automatically controlled, overheating of the heater is prevented and deterioration of the contents of the packaged product, for example, color change of the outer skin of fruits and vegetables. Can be prevented.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a stretch film packaging device according to the present invention.

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

FIG. 3 is a bottom view of an article to be packaged, showing a state in which the article to be packaged is packaged and heat-welded by using the film packaging apparatus of the present invention.

[Explanation of sign]

DESCRIPTION OF SYMBOLS 1 ... Base, 1a ... Side of base, 2 ... Film, 3 ... Heater base, 4 ... Cutter, 5 ... Heater holding case, 6 ... Heater, 7 ... Support plate, 9 ... Film mounting roller, 10 ... Item to be packaged, 12 ... Roll film, 15 ... Rear roller,
16 ... Front roller, 17 ... Bending piece.

Claims (2)

[Scope of utility model registration request] 1. A stretch film wrapping machine in which a long strip-shaped stretch film 2 is stored in a roll in a base 1 so as to be drawn out, and a heater wire is provided behind a heater base 3 provided in front of the base 1. A support plate in which a built-in film cutting cutter 4 is provided so as to project upward over substantially the entire width of the base 1, at least one of which is fixed to the upper surface of the heater base 3, and the other of which is slidable in the left-right direction. The upper and lower heater holding cases 5 and 5 are attached to the front and rear of each of the upper and lower heaters 7, and the plurality of heaters 6 and 6 are juxtaposed along the longitudinal direction of the respective heater holding cases 5 and 5. Of the heater holding cases 5, 5, ... At the rear end of at least one of the heater holding cases 5, 5 ... When the case 5 is pressed down, the heaters 6, ... provided with a limit switch to start, stretch film wrapping device, wherein the it has to stop the heaters 6,6 ... Atsushi Nobori after a predetermined time. 2. The stretch film wrapping machine according to claim 1, wherein the support plates 7, 7, ... Are fixed on the upper surface of the heater table 3 at a predetermined interval.