JPS643740B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a packaging device that pulls out a film of a film cylinder from a lead-out portion and wraps an article with the film.

(Prior Art) Conventionally, a packaging device is equipped with a support part for supporting one film cylinder at the rear of a base frame, and during packaging, the film of the film cylinder is pulled out from a lead-out part on the front side of the base frame. The article is packaged, and the pulled-out film is appropriately cut and adhesively held in a film holding section near the delivery section to prepare for the next packaging.

(Problem to be Solved by the Invention) By the way, various film cylinders with different film widths are provided in order to cope with the size of the articles to be packaged. When replacing a film cylinder for packaging, first peel off the film of the film cylinder to be removed from the holder, then remove the film cylinder and attach another film cylinder with a different width. After replacement, it is necessary to guide the film of the film cylinder through the inside of the main body of the apparatus to the outlet, which is quite troublesome in general.

As a countermeasure for this, supporting parts for supporting the film cylinders are provided in multiple stages above and below the rear of the base frame, and a plurality of holders are provided to adhesively hold the tip of each film passed through the base frame from each film cylinder. Further, a guide is provided to movably hold each holding body and guide it selectively to the lead-out part and a non-use position, and the film selectively guided to the lead-out part is pulled out to package the article. Try to do the following, and
A packaging device that can use a plurality of films without having to be replaced has been considered.

However, in this case, each film pulled out from each film cylinder to each holder overlaps vertically within the base frame, and in this case, the film sag due to the movement of the holder, especially If the upper film is slack, it may come into contact with the lower film, or both films may be attracted by static electricity, resulting in the films being stuck together.

The present invention has been made in view of the above circumstances, and its purpose is not only to enable the use of multiple film cylinders without having to replace them, but also to prevent the multiple films from sticking together within the base frame. To provide a packaging device which can surely eliminate the slack even when the slack length of the film is expected to be long, and can also have a compact structure for preventing this sticking.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides a plurality of support parts located at the rear of a base frame and provided in upper and lower stages and supporting film cylinders, respectively, and a plurality of support parts that are located at the rear of a base frame and that support film cylinders, respectively. Equipped with a plurality of holders that adhesively hold the leading end of each film passed through the film, and a guide that movably holds each holder and selectively guides it to the lead-out part on the front side of the base frame and to a non-use position. and a rotating arm rotatably provided inside the base frame so as to have a center of rotation approximately at the middle portion, in which the film selectively guided to the lead-out portion is pulled out to package the article; , a tension mechanism consisting of tension rollers provided at both ends of the rotary arm and a torsion spring that urges the rotary arm in a predetermined rotational direction is connected to a support portion other than the lowest stage among the plurality of support portions. A corresponding number of films are provided, and the films between the film cylinder supported by the supporting parts other than the lowest stage and the above-mentioned holder are individually stretched between the tension rollers of each tension mechanism, and this is applied to each film. It is characterized by applying tension so as to wind it up.

(Function) According to the above means, since the tension mechanism applies tension to the films other than the lowest stage to wind them, even if the film above the lowest stage film is about to sag, the tension mechanism The winding action eliminates this slack and creates a tensioned state.

In this case, the tension mechanism is configured to wind the film with a rotating arm whose rotation center is approximately at the middle, so it is compact and even if the slack length is expected to be long, such slack will not be absorbed. This does not occur and there is sufficient tension.

(Example) The following Figures 1 to 8 are for the first example of the present invention.
This will be explained with reference to the figures. First, in FIGS. 1 and 2, reference numeral 1 denotes a base frame as the main body of the apparatus, and a cover plate 2 which also serves as a work plate is disposed on the upper surface of the substantially intermediate portion thereof. A base plate 3 for packaging work is disposed on the top surface of the lid plate 2 so as to be movable back and forth, and a protrusion 4 for supporting fingers and guiding the film is provided on the front edge. . Reference numeral 5 designates a base plate for welding work provided at the front of the base frame 1, on the top surface of which an adhesive hot plate 6 is provided, and on the rear edge of the base plate 5 there is a panel board section. 7 is formed. Reference numeral 8 denotes an auxiliary holder made of a metal plate that is non-slip with respect to the film, and is fixedly attached to a portion of the base frame 1 located between the protrusion 4 and the base plate 5. Reference numeral 9 denotes a heat cutter disposed at the front and lower part of the auxiliary holder 8; 10 denotes a pull-out roller pivoted slightly forward of the lid plate 2; There is. Reference numeral 12 denotes a pressure roller, which is rotatably pivoted at the tip of a lever 13 that is pivoted to the support shaft 10a of the pull-out roller 10, and is rotated in the direction of arrow A and opposite to arrow A at the rear of the thermal cutter 9.
It is configured to be able to rotate in any direction. The pressure roller 12 is always urged to rotate in the opposite direction of arrow A by a spring (not shown), and is normally held at the upper rotational position shown by the solid line in FIG. Now, 13 is a first support part, 14 is a second support part, and the first support part 13 is supported by mounting rollers 15 and 16 which are pivotally installed at the rear of the base frame 1 so as to face each other in the front and back.
The film cylinder 17 is placed and supported by the first support part 13. Further, the second support section 14 includes frames 18, 18 erected at the rear of the base frame 1, and a mounting roller 1 temporarily installed on the upper part of the frame so as to be freely rotatable, facing each other in the front and back.
9 and 20, and a second film cylinder 21 having a width different from that of the film cylinder 17 is mounted and supported by the second support part 14. 2
Reference numeral 2 denotes a guide consisting of a groove, which is formed on the left and right side plates of the base frame 1 as follows. That is, 23 is an arc-shaped main terminal, which is formed in the base frame 1 below the lead-out portion 11. Reference numeral 24 denotes an arc-shaped first storage terminal, which is formed in the lower part of the base frame 1 in front of the main terminal 23. 25 is a first communication path, which extends slightly forward from the front of the main terminal 23 and then connects to the first storage terminal 24.
It is formed in a straight shape so as to communicate with the. 26 is a second arc-shaped storage terminal, which is attached to the base frame 1.
It is formed at the rear part of the main terminal 23 at. Reference numeral 27 denotes a second communication path, which is formed in a straight shape to communicate between the main terminal 23 and the second storage terminal 26. 28, 29 and 30
are positioning members, and their respective positioning protrusions 28
a, 29a and 30a are main terminal 23,
It is attached to the base frame 1 so as to face the inside of the 31 storage terminal 24 and the second storage terminal 26. On the other hand, 31 and 32 are movers that move within the guide 22, and since they have the same configuration,
The mover 31 will be described with reference to FIGS. 3 and 4. The mover 31 includes a support body 33 made of a long rectangular rod, and insertion shafts 33a and 33a formed at both ends of the support body 33. The bushings 34, 34 are movably inserted and supported, and the bushes 34, 34 are always urged to move in the direction of arrow B by springs 35, 35. And the button 3
Long ribs 36, 36 are provided on the inner end surfaces of 4, 34.
A recess 37 (only one shown) for positioning is formed in each of the ribs 36, 36. Therefore, the support body 33 of the mover 31 and the mover 3
A first holder 38 and a second holder 39 are attached to the second support 33, respectively, and these holders 38 and 39 are formed from metal plates to which a film can be attached. Smooth body 40 on the side
is installed. In FIG. 1, the mover 31 is fitted and held in the main terminal 23 of the guide 22, and the first holder 38 is held in the lead-out portion 11. Further, the mover 32 is fitted and held in the second storage terminal 26 of the guide 22, so that the second holding body 39 is held within the base frame 1, that is, in an unused position. In this case, as shown in FIG.
The recess 37 of the bush 34 is fitted, so that the holder 38 is positioned substantially vertically in the lead-out portion 11 facing the pull-out roller 10.
Further, the concave portion 37 of the mover 32 is fitted into the protrusion 30a of the positioning member 30, so that the second holding body 39 is positioned in a forward-inclined manner.

Reference numeral 41 denotes a tension mechanism, which has two supporting parts (supporting parts 13 and 14) in this embodiment, and the lowermost supporting part (first supporting part 13).
The number corresponding to the number of supporting parts (second supporting part 14) except for the second supporting part 14, that is, one is provided. As shown in FIG. 5, this tension mechanism 41 includes a pair of rotating arms 42 that are rotatably supported on the left and right side plates of the base frame 1 so that the center of rotation is approximately at the center of the base frame 1. Tension roller 4 rotatably installed between one end and the other end of each rotating arm 42
3 and 43, and a torsion spring 44 that biases the rotary arm 42 to rotate in the direction of arrow C in FIG. In FIG. 2, reference numerals 45 to 47 are guide rollers, which are pivotally installed at the front upper and lower parts of the mounting roller 15 in the base frame 1, and at the substantially middle lower part, respectively. Thus, the first film cylinder 1
The film 17a of No. 7 is placed on the upper surface side of the mounting roller 15,
The pull-out roller 10 and the first holder 38 are passed through the lower side of the guide roller 46 and the side of the guide roller 47 in order.
The leading end of the film 17a is adhesively held between the first holder 38 and the auxiliary holder 8 in a bridging state. The film 21a of the second film cylinder 21 passes through the upper surface of the mounting roller 19 and the lower surface of the guide roller 46, and is stretched between the tension rollers 43, 43 of the tension mechanism 41. The distal end portion of is adhesively held by a second holder 39. As shown in FIG. 1, on the surface of the panel board 7, a power switch 49 and a knob 50 for adjusting and setting the amount of heat generated by the hot adhesive plate 6 are arranged, while on the left side of the base plate 5, A knob 51 is provided to adjust and set the amount of heat generated by the cutter 9.

The operation of the above configuration will now be described.

First, a case will be described in which the film 17a of the first cylindrical body 17 is used to package an article. First, grasp the tip of the film 17a and pull it out from the lead-out section 11 as shown in FIG. 6a, and then as shown in FIG. 6b.
At the base plate 3 portion, a tray 52 containing food or the like is wrapped with the film 17a, and then the tray 52 is moved onto the pressure roller 12 as shown in FIG.
Press the pressure roller 12 at the lap portion 7a. Due to this pressure, the pressure roller 12 is rotated in the direction of arrow A, so that the film 17a is adhesively held by the first holder 38 and the auxiliary holder 8, as shown in FIG. A portion of the film 17a in front of the holding portion 8 is slanted and cut by a thermal cutter 9. After that, pull the tray 52 forward and downward as shown by arrow D, and remove the film 17.
The lap portion on the lower surface of the tray 52 in a is pressed by the pressing roller 12. After that, both ears 17b, 17b of the film 17a shown in FIG. do.

Next, when packaging a tray (not shown) having a width different from that of the tray 52, the second film cylinder 21 is
The case where the film 21a is used will be described. First, in the state shown in FIG. 2, the leading end of the film 17a is separated from the auxiliary holder 8. And Butsuyu 34,3
4 in the opposite direction of arrow B in FIG. 3 to make the mover 31 movable relative to the guide 22. Thereafter, the mover 31 is moved from the main terminal 23 of the guide 22 to the first storage terminal 24 through the first communication path 25. At this time, the insertion shaft 34a of the bush 34 passes through the curved portion 25a in the first communication path 25, and the rib 36 moves in the fitted state at other times. As the mover 31 moves, the first holder 38 is guided from the lead-out part 11 into the base frame 1, that is, to a non-use position, while adhesively holding the leading end of the film 17a (see FIG. 8). . In this first storage terminal 24, the bush 37 is fitted into the positioning member 29 to lock the mover 31 from rotating. Thereafter, the bushes 34, 34 of the mover 32 having the second holder 39 shown in FIG. 2 are pulled out to make the mover 32 movable relative to the guide 22. Then, the slider 32 is slightly tilted in the direction of arrow F in FIG.
from the storage terminal 26 into the main terminal 23 through the second communication path 27. With this movement, the second holder 39 is guided from the inside of the base frame 1, that is, from the unused position, to the lead-out portion 11 while holding the film 21 with adhesive.

In this case, the tension rollers 43, 43 of the tension mechanism 41 are rotated in the opposite direction of arrow C. Thereafter, the recesses 37 of the bushes 34, 34 are fitted into the positioning member 28, and the slider 32 is locked so that its second holder 39 is in a substantially upright position (see FIG. 8).

The film 21a is then pulled out from the lead-out section 11 in the same manner as described above, and the article is packaged in the same manner as described above. At the end of this packaging, the leading end of the film 21a is adhesively held by the second holder 39 and the auxiliary holder 8 in a bridging state as shown by the two-dot chain line in FIG.

Also, from the state shown in FIG.
When returning to the storage terminal 26, the auxiliary holding body 8
The leading end of the film 21a is separated from the film 21a and the procedure is reversed to that described above. In this case as well, the film 21a is adhesively held on the second holder 39, and there is a concern that the film 21a between the second holder 39 and the guide roller 45 may sag and hang down. This is prevented by rotating the tension rollers 43, 43 in the direction of arrow C and winding up the slack of the film 21a.

According to this embodiment, the following effects can be obtained.

Since the tension mechanism 41 is provided to apply tension in the rewinding direction to the film 21a when not in use, the film 21a is not in use when the film 21a is not used.
As a result, the film 21
It is possible to prevent the film 17a from hanging down and coming into contact with the film 17a below it, and also to prevent the films 17a and 21a from sticking together due to static electricity.

Furthermore, since this tension mechanism 41 is configured to wind up the film 21a by means of a rotary arm 42 whose rotation center is approximately at the middle portion, the structure is compact, and even when the slack length is expected to be long, However, it is possible to prevent the occurrence of such sagging and obtain a sufficient tension state.

Next, FIGS. 9 to 15 show a second embodiment of the present invention, and the differences from the first embodiment will be explained below. Reference numeral 53 denotes a third holding part provided above the holding body 14 of the body 2, and this is constructed between a pair of left and right frames 54 (only one shown) and these frames 54 so as to face each other in the front and back. It is composed of mounting rollers 55 and 56. This third
A third film cylinder 57 having a width different from that of the first film cylinder 17 and the second film cylinder 21 is mounted and supported on the support portion 53 . On the other hand, 58
are a pair of approximately fan-shaped metal guides (only one is shown), which are attached to the lower part of the lead-out portion 11 on the inner surface of the left and right side panels of the base frame 1 through bosses 59, respectively, as shown in FIG. Rotatably supported.
In the arcuate circular portion of the pair of guides 58, there are three holders, that is, the first holder 6, arranged at equal pitches.
0 and the second holding body 61 and the third holding body 62
are constructed, and each of the holding bodies 60 to 62
First to third pull-out rollers 63 are provided at the rear of the
65 are removably installed on the guide 58. Each of the pull-out rollers 63 to 65
The mounting structure of the pull-out roller 63 will be described as a representative example. That is, in FIGS. 9 and 11, reference numeral 66 denotes a fitting hole formed at the edge of the guide 58, which has a width part 66a that opens at the end of the guide 58. Reference numeral 67 denotes a shaft through which the pull-out roller 63 is inserted and supported, and a bush 68 movable in the direction of arrow G is disposed at both ends of the shaft (only one is shown) together with a return spring 69.
When the bushing 68 is fitted into the fitting hole 66, the pull-out roller 63 is held in that position, and when the bush 68 is pulled out in the direction of arrow G, it can be removed from the fitting hole 66. On the other hand, Figures 10, 12 and 1
In Fig. 3, reference numeral 70 denotes a lever for rotating the guide 58, which is attached to the end of the boss 59 protruding from the side plate of the base frame 1 so as to be rotatable in the direction of arrow H as shown in Fig. 13. is always spring 7
1, it is urged to rotate in the opposite direction of arrow H. A positioning pin 72 is attached to the middle of the lever 70, and this pin 72 fits into any one of the three positioning holes 1a formed in the side plate of the base frame 1 to move the guide 58. It is held in any of the rotational positions shown in FIGS. 9, 14, and 15. Now, in the state shown in Fig. 9, the guide 5
8 is held in the middle position of its rotation range,
In this case, the second holder 61 is located at the lead-out portion 11, and the other holders 60 and 62 are located within the base frame 1, that is, at unused positions.

On the other hand, in FIG. 9, 73 and 74 are tension mechanisms that are the same as the tension mechanism 41 in the first embodiment, and these are provided within the base frame 1 as shown in the figure. These tension mechanisms 73, 7
4, 73a and 74a are rotating arms, 73
b, 74b are tension rollers. Note that a torsion spring is not shown in this embodiment. In this embodiment as well, the number of tension mechanisms (two in this case) corresponding to the number of support parts 14 and 53 other than the support part 13 at the lowest stage is provided.

A tension relieving spring 75 is provided between each tension mechanism 73 and 74 and the guide 58.
and 76 have been adjusted. Guide rollers 77 to 81 are provided at the positions shown in the figure. In FIG. 9, the film 17a of the first film cylinder 17 is passed through the lower surface of the mounting roller 15 and the lower surfaces of guide rollers 77 and 78, and is also passed through the first pull-out roller 63 and the first The film 17a is guided between the slippery bodies 40 of the holder 60, and the leading end of the film 17a is adhesively held on the first holder 60. Moreover, the second film cylinder 21
The film 21a is passed through the upper surface side of the mounting roller 19, the lower surface side of the guide roller 79, the tension mechanism 73, and the lower surface side of the guide roller 80, and is passed through the second
The film 21 is passed between the pull-out roller 64 of the second holding body 61 and the sliding body 40 of the second holding body 61.
The tip of a is adhesively held by a second holder 61, and in this case, the second holder 61 is attached to the lead-out portion 11.
Therefore, the film 21a of the second film cylinder 21 is led out to the lead-out portion 11 part. Further, the film 57a of the third film cylinder 57 is passed through the upper surface side of the mounting roller 55, the lower surface side of the guide roller 81, and the tension mechanism 74, and is also passed through the third pull-out roller 65 and the third holder 6.
The film 57a is passed between the two sliding bodies 40, and the leading end of the film 57a is adhesively held by the third holding body 62.

Next, the operation of the above configuration will be described.

First, in the state shown in FIG. 9, when the film 21a of the second film cylinder 21 is used for packaging articles, the second holder 61 holding the film 21a is present in the lead-out part 11, so the guide 58 The same procedure as in the first embodiment is carried out without any rotation.

Further, the film 17a of the first film cylinder 17
When using the guide 58 for packaging goods, the guide 58 is
4 to the position shown in FIG. 4 to guide the first holder 60 to the lead-out portion 11. At this time, as the guide 58 rotates, the second holder 61 is guided into the base frame 1, that is, to the non-use position while holding the film 21a with adhesive, while the third holder 62 is guided to the non-use position as shown in FIG. The holding bodies 60, 61 and 62 are in communication with each other. In this case, the film 21 of the second film cylinder 21
The slight slack in a is wound up by the tension mechanism 73.

Furthermore, the film 5 of the third film cylinder 57
When using 7a for packaging goods, guide 5
8 to the position shown in FIG.
2 to the deriving section 11. And this 15th
When the guide 58 is rotated from the state shown in the figure to the position shown in FIG. 9 or 14, the film 57a is wound up by the tension mechanism 74.

According to the second embodiment described above, the slack of the films 21a, 57a is removed by the tension mechanism 73,
74, the films 17a, 21a, 57a do not come into contact with each other or stick to each other.

16 and 17 show a third embodiment of the present invention, which differs from the second embodiment in the following points. That is, the rear end of the lid board 2 is rotatably supported by the support shaft 2a (can be opened and closed with respect to the base frame 1), and the lid board 2 is rotatably supported by the base frame 1. L-shaped locking member 82 (see Fig. 17)
This locks the blockage state.
Further, a pull-out roller 84 is attached to the lower part of the protrusion 4 at the front end of the lid board 2 via an arm 83. Furthermore, the guide 58 has three parts in the second embodiment.
Instead of the one fitting hole 66, three notched groove-shaped fitting holes 85 are formed. The shaft 84a of the pull-out roller 84 is fitted into one of the three fitting holes 85 by rotation of the lid plate 2, and the pull-out roller 84 is fitted into one of the three fitting holes 85 in the lead-out portion 11.
It is arranged to face one of the two holders 60 to 62.

According to this third embodiment, only one pull-out roller 83 is required, the configuration can be simplified, and the guide 5
Since the pull-out roller 83 is not provided in the guide 8, the space for the guide 58 is widened, and there are advantages such as the arrangement interval of the holders can be made smaller and a large number of holders can be arranged.

Incidentally, in each of the above embodiments, a case has been described in which film cylinders having different widths are used, but a plurality of film cylinders of the same size may be used as spares.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, but can be implemented with various changes without departing from the spirit thereof.

〔Effect of the invention〕

As explained above, the present invention not only allows multiple film cylinders to be used without any replacement, but also prevents multiple films from sticking together within the base frame. Even when the slack length is expected to be long, the slack can be reliably eliminated, and the structure for preventing this adhesion can be made compact, resulting in excellent effects.

[Brief explanation of drawings]

1 to 8 show a first embodiment of the present invention, in which FIG. 1 is an overall perspective view, FIG. 2 is an enlarged longitudinal sectional side view, FIG. Figure 4 is a perspective view of the same part, Figure 5 is a plan view of the tension mechanism part, Figures 6 a to d are side views of the main parts for explaining the packaging procedure, and Figure 7 shows one state of the packaging procedure. A perspective view of the tray, FIG. 8 is an enlarged longitudinal sectional side view shown in a different state from FIG. 9 to 15 show a second embodiment of the present invention, FIG. 9 is a view corresponding to FIG. 2, FIG. 10 is a cross-sectional plan view showing the pivot structure of the guide, and FIG. Figure 12 is a side view of the front part of the device;
3 is a cross-sectional side view of the lever portion, and FIGS. 14 and 15 are vertical side views of the lever portion in different states from those in FIG. 9. 16 and 17 are a view corresponding to FIG. 9 and a view corresponding to FIG. 12, respectively, showing a third embodiment of the present invention. In the figure, 1 is a base frame, 9 is a thermal cutter, 10 is a pull-out roller, 13 is a first holding part, 14 is a second holding part, 15 and 16 are mounting rollers, and 17 is a first film cylinder. , 19 and 20 are loading rollers, 21 is a first film cylinder, 22 is a guide, 23 is a main terminal, 24 is a first storage terminal, 26
is a second storage terminal, 31 and 32 are movers, 33 is a support, 34 is a bush, 37 is a recess, 38 is a first holder, 39 is a second holder,
41 is a tension mechanism, 42 is a rotating arm, 43
is a tension roller, 44 is a torsion spring, 51 is a tray, 53 is a third holding body, 55 and 56 are mounting rollers, 57 is a third film cylinder, 58 is a guide, 60 to 62 are first to third holder, 6
3 to 65 are first to third pull-out rollers; 70
is a lever, 73 and 74 are tension mechanisms, 73
a and 74a are rotating arms, 73b and 74b are tension rollers, and 84 is a pull-out roller.

Claims (1)

[Claims] 1. A plurality of supporting parts located at the rear of the base frame and provided in multiple stages above and below to support film cylinders, respectively, and adhesively holding the tip of each film passed from each film cylinder into the base frame. a plurality of holding bodies,
A guide is provided to movably hold each holding body and selectively guide it to a leading-out part on the front side of the base frame and a non-use position, and the film selectively guided to the leading-out part is pulled out to package the article. A rotary arm rotatably provided inside a base frame so as to have a center of rotation approximately at its center, tension rollers provided at both ends of the rotary arm, and the rotary arm. A tension mechanism consisting of a torsion spring that biases the film in a predetermined rotational direction is provided in a number corresponding to the number of support parts other than the lowest stage among the plurality of support parts, and the film cylinder body supported by the support parts other than the lowest stage is provided. 2. A packaging apparatus characterized in that the films between the holder and the holder are individually stretched between tension rollers of each tension mechanism, and tension is applied to each film so as to wind it up.