JPS643741B2 - - 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, some packaging devices are equipped with a plurality of film cylinders so that the film of one of the film cylinders can be selectively pulled out and used. A plurality of support mechanisms are located at the rear of the base frame and are provided in upper and lower stages to respectively support film cylinders, and adhesively hold the leading end of each film passed through the base frame from each film cylinder. The film is provided with a plurality of holders and a guide that movably holds each holder and selectively guides the holder to a leading-out part on the front side of the base frame and an unused position, and the film is selectively guided to the leading-out part. The container is pulled out to package items.

(Problem to be Solved by the Invention) However, in this case, when the film cylinder is attached to multiple stages of support mechanisms, the distance between the support mechanisms must be increased so that the upper support mechanism does not get in the way. There was a problem that needed to be solved: increasing the size in the vertical direction.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a plurality of upper and lower support mechanisms for supporting film cylinders, respectively, and to pull out the film of any one of the film cylinders from a lead-out portion. In a device for packaging articles, a structure in which the spacing between supporting mechanisms is kept small, the film barrel can be installed smoothly, the film does not come off from the holder, and the films do not stick to each other. There is no packaging equipment to provide.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides a plurality of support mechanisms that are located at the rear of a base frame and are provided in upper and lower stages to support film cylinders, respectively, and a plurality of support mechanisms 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. In the device for packaging articles by selectively pulling out the film guided to the lead-out portion, each of the support mechanisms other than the bottom stage is moved from a substantially horizontal state to a rear end portion. It consists of a support arm provided so that its front end can rotate upward with the center of rotation at , and mounting rollers provided at both ends of this support arm, and the center of rotation is approximately at the middle. A tension mechanism consisting of a rotary arm rotatably provided inside a base frame, tension rollers provided at both ends of this rotary arm, and a torsion spring that urges the rotary arm in a predetermined rotation direction. are provided in numbers corresponding to the number of support mechanisms other than the lowest stage among the plurality of support mechanisms, and the film between the film cylinder supported by the support mechanisms other than the lowest stage and the holder is individually tensioned by each tension mechanism. The device is characterized in that the film is stretched between tension rollers of the film, and tension is applied to each film so as to wind the film.

(Function) The support mechanisms other than the lowest stage are wide open (especially on the front side) with the lower support mechanisms by rotation of the support arm. This allows the film to be placed on the lower support mechanism. When the rotated support mechanism is rotated back to its original position, the distance between the support mechanism and the support mechanism below it becomes narrower.
As a result, the mutual spacing between the support mechanisms can be reduced, and the vertical height can be reduced.

Furthermore, if the support mechanism other than the lowest stage is configured so that its support arm can rotate at its rear end, the front part of the support arm may be inadvertently pivoted momentarily upward to its original position. When the film cylinder body is agitated when it returns to normal, there is a risk that the film will be pulled backwards and come off the holder. The part of the film wound around this tension is only pulled backwards, and no pulling force is applied to the film in the holder part.
As a result, the film will not come off the holder. This tension mechanism has a configuration in which the film is wound up by a rotating arm whose rotation center is approximately in the middle, so it is compact and can absorb the slack of the film during normal use, while also increasing the length of the slack. Even if this is expected, such slack will not occur and sufficient tension will be maintained.

(Example) An example of the present invention will be described below with reference to the drawings. First, in FIGS. 1 and 2, reference numeral 1 denotes a base frame, and a cover plate 2, which also serves as a work plate, is disposed on the upper surface of an approximately intermediate portion of the base frame. 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 disposed at the front of the base frame 1. A hot adhesive plate 6 is disposed on the upper surface of the base plate 5, and a cutter mounting portion 7 is provided at the rear upper part of the base plate 5. is formed.
Reference numeral 8 denotes an auxiliary holder made of a metal plate that does not slip on the film, and is attached to the cutter attachment part 7. Reference numeral 9 denotes a thermal cutter, which is disposed in front of the auxiliary holder 8 in the cutter mounting portion 7. Here, between the lid plate 2 and the auxiliary holder 8 is a lead-out section 10 for leading out the film. Reference numeral 11 denotes a pressure roller, which is rotatably supported at the tip of a lever 13 that is pivotally mounted on a support shaft 12, and is rotatable in the direction of arrow A and the direction opposite to arrow A at the front part of the thermal cutter 9. It is structured as follows. Note that the pressure roller 11 is always urged to rotate in the direction of arrow A by a spring 11a.
It is designed to be held in the upper rotational position shown in the figure. On the other hand, reference numerals 14 and 14 denote a pair of substantially fan-shaped metal guides, which are rotatably supported via bosses 15 at the lower portions of the lead-out portion 10 on the inner surfaces of the left and right side plates of the base frame 1. . Three holders, namely a first holder 16, a second holder 17, and a third holder 18, are installed at equal pitches on the arcuate edges of the pair of guides 14. First to third pull-out rollers 19 to 21 are installed at the rear of each of the holders 16 to 18 so as to be removably attached to the guide 14, respectively. still,
Each of the holders 16, 17 and 18 is provided with film guides 16a, 17a that are slippery for the film.
and 18a are attached, respectively. In FIGS. 1 and 3, reference numeral 22 denotes a lever for rotating the guide 14, which is attached to the boss 15. As shown in FIGS. A positioning pin 23 is attached to the middle part of this lever 22, and this pin fits into one of the three positioning holes 1a formed in the side plate of the base frame 1 as shown in FIG. 2 and 8.
It is to be held in any of the rotational positions shown in the figure and FIG. 9. Now, in the state shown in FIG. 2, the guide 14 is held at an intermediate position in its rotation range, and in this case, the second holder 17 is located in the lead-out part 10, and the other holders 16 and 18 is located at an unused position within the base frame 1. Further, 24 and 25 are tension mechanisms, and since these have the same configuration, the tension mechanism 24 will now be described as a representative.
That is, the tension mechanism 24 includes a pair of rotating arms 26 (only one of which is shown) that is pivotally supported on the left and right side plates of the base frame 1 so that the center of rotation is the center of rotation; It is comprised of tension rollers 27, 27 rotatably installed between the other ends, and a torsion spring 28 that biases the rotary arm 26 to rotate in the direction of arrow B in FIG. Tension-relieving springs 29 and 30 are stretched between each tension mechanism 24 and 25 and the guide 14.

On the other hand, 31, 31 are frames erected at the rear of the base frame 1 to face each other from side to side.
One part includes first, second and third support mechanisms 32,
33 and 34 are provided in a plurality of upper and lower stages, and each support mechanism 32, 33, and 34 will be described below. That is, the first support mechanism 32 located at the lowest stage is composed of mounting rollers 35 and 36 rotatably installed on the rear part of the base frame 1 and the lower end portions of the frames 31 and 31 so as to face each other front and back. Next, the second support mechanism 33 located at the middle stage and the third support mechanism 34 located at the top stage have the same configuration, and the second support mechanism 33 will now be described as a representative. That is, in FIGS. 1, 2, and 4, reference numerals 37 and 37 are support arms that are pivotably supported so that the rear ends thereof are the center of rotation. A roller 38 is rotatably mounted via bearings 39 (only one is shown in FIG. 7). and support arm 37
On the rear end side, a mounting roller 40 is rotatably installed on the frames 31, 31 via bearings 41 (see FIG. 1) so as to be rearward and opposite to the mounting roller 38. The support arms 37, 37 each have a positioning piece 42 (only one shown in FIGS. 1 and 4) protruding from the support arms 37, 37, while the frames 31, 31 are in contact with the positioning piece 42. A stopper 43 is attached to the support arms 37, 37 to provide a downward rotation limit position. Therefore, the support arms 37, 37 are provided so that the front ends can rotate upward from a substantially horizontal state about the rear ends. Further, an L-shaped engagement piece 44 is pivotally supported on the frame 37.
The engagement piece 44 is always urged to rotate in the direction of arrow C by a spring 45. This engaging piece 44 has an engaging protrusion 44a at one end, and this engaging protrusion 44a engages the positioning piece 4 of the support arm 37.
2 to lock the rotation of the support arm 37 in the direction of arrow D. The engagement protrusion 44
A slope portion 44b is formed at the upper part of a. In FIGS. 4 and 5, 46 is a support arm 37.
This is a spring provided to constantly bias the rotation in the direction of arrow D. It should be noted that the same parts of the third support mechanism 34 as those of the second support mechanism 33 are given the same reference numerals. Reference numerals 47, 48, and 49 are locking devices consisting of electromagnetic brakes, and the locking device 47 is designed to exert a braking action on the shaft portion 35a of the front loading roller 35 in the first support mechanism 32, as shown in FIG. It is attached to the side plate portion of the base frame 1. Further, as shown in FIG. 7, the locking devices 48 and 49 are attached to the support arm 37 in order to exert a braking action on the shaft portion 38a of the front loading roller 38 in the second support mechanism 33 and the third support mechanism 34. ing. In FIG. 6, reference numeral 50 denotes a detection device, which includes a detection disk 51 which is attached to the mounting roller 35 of the first support mechanism 32 so as to rotate integrally therewith.
and a detection switch 52 made of, for example, a photocoupler, provided adjacent to the detection disk 51. The detection disk 51 is provided with a plurality of detection holes 51a arranged equidistantly around the circumference.
A detection switch 52 detects passage of the detection small hole 51a when the detection disk 51 rotates with rotation of the mounting roller 17, and operates the locking device 47 based on this detection signal. The second support mechanism 33 and the third support mechanism 34 also have a detection device 53 having the same configuration as the detection device 50 described above.
and 54 are provided, respectively, and as shown in FIG. 7, the same parts as the detection device 50 are given the same reference numerals and the description thereof will be omitted. In Figures 1 and 2, 55,5
6 and 57 are the first, second and third, respectively, having different widths.
The first film cylinder 55 is mounted and supported by a first support mechanism 32, a second support mechanism 33, and a third support mechanism 34, respectively.
The film 55a is placed on the lower surface side of the loading roller 35, and on the guide rollers 58 and 59 (both shown in FIG. 1).
It is passed through the lower surface side, and is also passed between the first pull-out roller 19 and the film guide 16a of the first holder 16, and is adhesively held by the first holder 16. And the film 5 of the second film cylinder 56
6a is passed through the upper surface side of the mounting roller 38 and the lower surface side of the guide roller 60 in the second support mechanism 33,
And the tension roller 2 of the tension mechanism 24
7 and 27, and is further passed through the lower surface side of the guide roller 61, and passed between the second pull-out roller 20 and the film guide 17a of the second holder 17, and is then passed through the second holding roller 20 and the second holding body 17. It is adhesively held on the body 17. Further, the film 57a of the third film cylinder 57 is passed through the upper surface side of the mounting roller 38 and the lower surface side of the guide roller 62 in the third support mechanism 34, and is passed through the tension roller 2 of the tension mechanism 25.
7 and 27, and is further passed between the third pull-out roller 21 and the film guide 18a of the third holder 18, and is adhesively held by the third holder 18. And each of the above films 56
a, 57a are given tension by tension mechanisms 24, 25 so as to be wound up. By selecting one of the three rotating positions of the guide 14, the film of each of the film cylinders 55, 56, and 57 can be positioned in the lead-out portion 10. There is.
Note that 33a is a roller installed on the support arms 37, 37 of the second support mechanism 33, which is used to prevent the film 57a of the third film cylinder 57 from adhering to the film 56a of the second film cylinder 56. This is to prevent

In the above structure, the case where the first to third film cylinders 55 to 57 are placed on the first to third support mechanisms 32 to 34 will be described. First, the fourth
From the state shown by the solid line in the figure, each engagement piece 44 of the second support mechanism 33 and the third support mechanism 34 is moved to the positioning piece part 42.
The support arms 37 of the second support mechanism 33 and the third support mechanism 34 are retracted to the upper rotational position (see the two-dot chain line in FIG. 4 and the solid line in FIG. 10). As a result, the space between the second support mechanism 33 and the support mechanism 32 below it (particularly on the front side) is wide open.
In this state, the first film cylinder 55 is
It is placed on the first support mechanism 32 through the lower part of the second support mechanism 33 in the retracted state. and the second
The support arms 37, 37 of the second support mechanism 33 are rotated in the opposite direction of arrow D, and the positioning piece 42 is engaged by the engagement piece 44 as shown in FIG. (See the solid line in Figure 4 and the two-dot chain line in Figure 10). In this state, the space between the third support mechanism 34 and the second support mechanism 33 is wide open. In this state, the second film cylinder 56 is then placed on the second support mechanism 33 through the lower part of the third support mechanism 34 which is in the retracted state. Furthermore, when placing the third film cylinder 57 on the third support mechanism 34, the third film support mechanism 3 is placed in the retracted state as shown by the solid line in FIG.
The fourth support arms 37, 37 are rotated in the opposite direction of arrow D, and the positioning piece 42 is engaged by the engaging piece 44 in the same manner as described above, thereby moving the third support mechanism 34 to the horizontal position (see the two-dot chain line). ). Then, the third film cylinder 57 is placed on the third support mechanism 34. After this, each film cylinder 55 to 57
The films 55a to 57a are adhesively held on the respective holders 16 to 18 of the guide 14 as described above.

Next, the case of packaging an article will be described. First, for example, the film 56a is pulled out as shown in FIG. 11a. With this, the mounting roller 3 of the second support mechanism 33
8 and 40 are rotated to sequentially lead out the film 56a from the second film cylinder 56, and the detection disk 51 of the mounting roller 38 is rotated. Each time the detection small hole 51a of the detection disk 51 passes the detection switch 52, the detection switch 5
2 is detected, and when the detection signal reaches a set number of times, the lock device 48 is energized and driven by a control circuit (not shown) to lock the rotation of the mounting roller 38 (primary lock). As a result, the supply of film 56a is stopped. In this primary lock state, the pulled-out portion of the film 56a is guided toward the base plate 3 as shown in FIG. 11b, and the film 56a is
6a is passed to the bottom of the tray 64 containing the article 63 at the third portion of the base plate. Further, the tray 64 is moved in the direction of arrow E, and the film 56a is attached to the tray 64 in an expanded state. In this case, since the loading roller 38 is primarily locked, the film 56a is sufficiently stretched without being unnecessarily drawn out, and the article 63 and tray 64 are reliably wound with the tensioned film 56a.
Thereafter, a touch switch (not shown) is turned on to cut off the power to the lock device 48 via the control circuit, thereby releasing the primary lock. This unlocking allows the film 56a to be pulled out. Then, pull out the tray 64 forward as shown in FIG. 11c. Then, as in the case described above, when the film 56a is pulled out by a set amount, the locking device 48 is activated by the detection device 53.
is energized and the rotation of the mounting roller 38 is locked (secondary lock). Thereafter, as shown in FIG. 4D, the tray 64 is moved toward the pressure roller 11 while stretching the film 56a, and the pressure roller 11 is pressed in the opposite direction of arrow A by the lap portion of the film 56a on the lower surface of the tray 64. Due to this pressure, the pressure roller 11 is rotated in the opposite direction of arrow A,
As a result, a secondary lock release switch (not shown) is turned on, and the lock device 4 is unlocked via the control circuit.
8 is cut off and the secondary lock is released, and
As shown in FIG. 11d, the film 56a is adhesively held by the first holder 17 and the auxiliary holder 8, and the film 56a in front of the auxiliary holder 8
The portion becomes inclined and is cut by a thermal cutter 9. Thereafter, the tray 64 is pulled forward and downward as shown by arrow F, and the wrap portion of the film 56a on the lower surface of the tray 64 is pressed by the pressure roller 11. After that, the film 56 shown in FIG.
Turn both ears 56b, 56b of the tray 6 in the direction of arrow G (towards the bottom of the tray 64), and
The film 56a at the bottom of 4 is welded using an adhesive hot plate 6.

According to this embodiment, the following effects can be obtained. That is, it is a support mechanism other than the lowest stage. Second support mechanism 33 and third support mechanism 34
The support arm 37 can be rotated from a substantially horizontal position to a forward upward rotation position and evacuated.
The front sides of the second support mechanism 33 and the third support mechanism 34 are wide open relative to the lower support mechanism. As a result, when each film cylinder 55 to 57 is placed on each support mechanism 32 to 34, this can be done without any interference from the second support mechanism 33 and the third support mechanism 34, and the film cylinder body 55 to 5
The installation work in step 7 can be made easier. Moreover, when the film cylinders 55 to 57 are used, by placing the second support mechanism 33 and the third support mechanism 34 in a horizontal state, the distance from the lower support mechanism, that is, the vertical height, can be reduced. , miniaturization can also be achieved.

By the way, in the case of this embodiment in which the support mechanisms 33 and 34, which are support mechanisms other than the lowest stage, are configured such that their support arms 37 can rotate at their rear ends, the support arms 37 of the support mechanisms 33 and 34 are When the front portion is inadvertently momentarily rotated upward and then returned to its original position, and the film barrel 56 or 57 is blown upward, the film 56a or 57a is rotated backwards. However, according to this embodiment, tension mechanisms 24 and 25 are provided in numbers corresponding to the number of support mechanisms 33 and 34 other than the support mechanism 22 at the lowest stage. Since the tension mechanisms 24 and 25 are provided with the respective films 56a and 57a wound up between the tension rollers 27 and 27,
The film 56 of each holding body 17, 18 is only pulled backward so that it is unraveled.
The tensile force does not extend to a, 57a,
As a result, each film 56a, 57a does not come off from each holder 17, 18. Furthermore, the tension mechanisms 24 and 25 rotate the film 56a,
Since the film 57a is wound up, it is compact, and in normal use, the film 56a,
It is possible to absorb the slack of the film 57a, and even if the length of the slack is expected to be long, such slack does not occur and a sufficient tension is created, and as a result, the films 56a and 57a come into contact with the lower film. It also does not get stuck due to static electricity.

〔Effect of the invention〕

As explained above, the present invention provides a support arm in which each of the support mechanisms other than the lowest stage of the support mechanisms is provided such that the front end portion can rotate upward from a substantially horizontal state with the rear end portion as the rotation center. and the mounting rollers provided at both ends of the support arm, it is possible to create a structure in which the spacing between the plurality of support mechanisms can be kept small, making it possible to achieve miniaturization. Installation work can also be carried out smoothly.

Further, the rotating arm is rotatably provided inside the base frame so that the center of rotation is approximately at the center, tension rollers are provided at both ends of the rotating arm, and the rotating arm is rotated in a predetermined rotation direction. A tension mechanism consisting of a torsion spring that biases the film is provided in a number corresponding to the number of support mechanisms other than the lowest stage of the plurality of support mechanisms, and the tension mechanism is provided in a number corresponding to the number of support mechanisms other than the lowest stage of the plurality of support mechanisms, and the tension mechanism is The film in between is individually wrapped between the tension rollers of each tension mechanism, and tension is applied to each film to wind it.
Since the support mechanism has a rotating structure, even if the film barrel is inadvertently agitated, the film will not come off the holder, and the films will not stick to each other, resulting in excellent effects. play.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which FIG. 1 is a perspective view of the whole, FIG. 2 is a longitudinal side view, FIG. 3 is a side view of the lever portion, and FIG. 4 is a side view of the second support mechanism portion. 5 is a sectional view taken along the line of FIG. 4, and FIG. 6 is a cross sectional view of the locking device portion of the first support mechanism.
FIG. 7 is a cross-sectional view of the locking device portion of the second support mechanism, FIGS. 8 and 9 are longitudinal cross-sectional side views of the locking device portion that differs from FIG. 2, and FIG. Figures 11a to 11d are side views of the delivery portion for explaining the packaging procedure, and Figure 12 is a perspective view of the tray showing one state of the packaging procedure. It is a diagram. In the figure, 1 is a base frame, 9 is a thermal cutter, 10 is a lead-out part, 11 is a pressure roller, 14 is a guide, 16, 1
7 and 18 are first, second and third holding bodies, 1
9, 20 and 21 are first, second and third pull-out rollers, 22 is a lever, 24, 25 are tension mechanisms, 26 is a rotating arm, 27 is a tension roller, 28 is a torsion spring, 31 is a frame, 32 ，
33 and 34 are first, second and third support mechanisms;
35 and 36 are mounting rollers, 37 is a support arm,
38 is a mounting roller, 40 is a mounting roller, 47, 4
8 and 49 are lock devices, 50, 53 and 54 are detection devices, and 55, 56 and 57 are first, second and third film cylinders.

Claims (1)

[Claims] 1. A plurality of support mechanisms located at the rear of the base frame and provided in multiple upper and lower stages, each supporting a film cylinder;
A plurality of holders that adhesively hold the leading end of each film passed through the base frame from each of the film cylinders, and a plurality of holders that movably hold each holder and selectively connect to a lead-out portion on the front side of the base frame. and a guide for guiding the film to the use position, and wrapping the article by pulling out the film selectively guided to the leading-out part, wherein the supporting mechanisms other than the lowest one of the supporting mechanisms are , each consisting of a support arm provided so that its front end can rotate upward from a substantially horizontal state with its front end pivoted about its rear end, and mounting rollers provided at both ends of this support arm, A rotary arm rotatably provided inside the base frame so that the rotation center is approximately at the middle portion, a tension roller provided at both ends of the rotary arm, and a rotation arm that rotates the rotary arm in a predetermined rotation direction. A tension mechanism consisting of a torsion spring that biases the film is provided in a number corresponding to the number of support mechanisms other than the lowest stage of the plurality of support mechanisms, and the tension mechanism is provided in a number corresponding to the number of support mechanisms other than the lowest stage of the plurality of support mechanisms, and the tension mechanism is A packaging device characterized in that the films in between are individually stretched between tension rollers of each tension mechanism, and tension is applied to each film to wind it up.