JPH06239317A - Interlocking mechanism between packaging body feeding-switching device and packaging body folding device in packaging machine - Google Patents

Abstract

PURPOSE:To unify the positioinal adjustment for the width direction and interval in response to the size of a tray by a method wherein a folding members which are relatively movable in the longitudinal direction to each other at front and rear sides being confronted, and a movable member which is supported rotatably in the orthogonal direction and also in the lateral direction are provided, and respective members are approached or separated. CONSTITUTION:Films 5a, 6a with large and small width sizes, which are stretched at the uppermost part, are pinched by comb tooth formed gripping bodies 16, 17, and when the output shaft 27a of a motor 27 rotates, both side plates 10 are turned in the vertical direction with a pivotal shaft 9 as the pivot, and one of film feeding parts 12 and 13 approaches or is separated from to correspond to a film feeding position P, and the film is pulled out. For the next film feeding device, a folding member is rotatably supported in the horizontal direction, and is extended to the rear direction, and is interlocked with a film feeding switching device 1. A controller controls a separating distance of a film pulling out body based on the width of a tray which is detected by an article size detecting means, and the pulling out dimension of the film is set. Therefore, a positional adjustment driving means can be unified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interlocking mechanism between a film feeding / switching device and a film folding device in a packaging machine for packaging a tray containing fresh foods with a stretch film.

[0002]

2. Description of the Related Art Conventionally, as a film feed switching device of this type, there is one disclosed in, for example, Japanese Patent Laid-Open No. 53-61494. In this device, the leading ends of the films drawn from the film winding rolls having different width sizes are respectively gripped by the film feeding unit, and one of the two feeding units is manually switched to change the film. It corresponds to the feeding position.

Further, as a conventional film folding device,
For example, there is one disclosed in Japanese Patent Laid-Open No. 62-193909. This device is provided with front and rear and left and right folding members for folding the film under the tray, and the interval between the pivot points of the left and right folding members can be adjusted according to the size of the tray.

[0004]

All of these devices have the function of adjusting the position according to the size of the tray, but since the adjustment is performed individually, separate adjustment drive means are required. I was trying.

Therefore, the present invention is to unify the position adjusting driving means of both devices.

[0006]

As shown in the drawings of the embodiments to be described later, the packaging machine according to the present invention includes a packaging material feeding / switching device 1 and a packaging material folding device 32.
In the package feed switching device 1, the movable member 10 is provided with two or more package feed units 12 and 13, and any one of the package feed units 12 and 13 is moved along with the movement of the movable member 10.
Corresponds to the package delivery position P. On the other hand, in the package folding device 32, the front folding member 39 and the rear folding member 44, which are relatively movable in the front-rear direction, are provided on both front and rear sides facing each other in the packaging section S, and the front-rear direction is also provided. Left and right movable members 33 are provided movably in the left and right directions on both right and left sides in a direction orthogonal to the right and left movable members 33, and left and right folding members 35 are rotatably supported in the left and right movable members 33. The folding members 39, 44, 35 are arranged so that they approach or separate from each other in the packaging section S.

In particular, the movable member 10 of the package delivery switching device 1 and the left and right movable members 33 of the package folding device 32.
Are connected by interlocking means 50, 52, 55, and drive means 24, 27, 29, 30 for moving one of the movable members 10, 33 are provided.

[0008]

When the movable member 10 of the package feeding / switching device 1 is moved by the driving means 24, 27, 29, 30 according to the size of the article, the interlocking means 50, 52, 55 are used.
As a result, the left and right movable members 33 of the package folding device 32 also move and the space between them changes.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An outline of a stretch film packaging machine according to an embodiment of the present invention will be described below with reference to the drawings, centering on a film feed switching device and a film folding device.

(Regarding Film Delivery Switching Device 1) First, the film delivery switching device 1 shown in FIGS. 1 and 2 to 4 will be described. Both front mounting rollers 3 and rear both mounting rollers 4 are installed on the top of the machine frame 2. The film winding roll 5 having a small width size is mounted on the both mounting rollers 3 on the front side. A film winding roll 6 having a large width size is placed on both rear placing rollers 4. Each of the film winding rolls 5 and 6 is positioned by both holding plates 7 and 8 on one of the placing rollers 3 and 4.

A support shaft 9 is provided at an intermediate portion in the vertical direction of the rear portion of the machine frame 2.
Are horizontally rotatably supported in the horizontal direction, and side plates 10 as movable members are integrally rotatably attached to both left and right ends of the support shaft 9. A guide roller 11 is fitted around the support shaft 9 between the side plates 10. This side plate 1
Reference numeral 0 projects forward, and film feed portions 12 and 13 are provided on the upper and lower sides between the front portions, respectively.

In each of the film feeding portions 12 and 13, an operating lever 14 is supported on both side plates 10 so as to be rotatable around a shaft 15, and a comb-like movable gripping body 16 is provided between the operating levers 14. Has been attached. This movable gripper 1
A comb-tooth-shaped fixed gripping body 17 is provided above both sides and between both side plates 10. Both operation levers 14 are biased by a torsion coil spring 18 on a shaft 15, and the biasing force presses the movable gripping body 16 against the fixed gripping body 17. A movable holding roller 19 is installed between the operating levers 14 between the grippers 16 and 17 and the support shaft 9. A fixed holding roller 20 is provided above the movable holding roller 19 and between both side plates 10. The movable holding roller 19 is also fixed by the biasing force of the torsion coil spring 18.
It is designed to be pressed against 0. Both upper and lower electromagnetic brakes 21 are attached to one side plate 10, and upper and lower fixed holding rollers 20 are connected to the both electromagnetic brakes 21.

The film 5a drawn out from the film take-up roll 5 having a small width is guided by each guide roller 22 and is held by the first film feeding section 12 at both the holding rollers 1.
It passes between 9 and 20 and is sandwiched between both grippers 16 and 17. The film 6a pulled out from the film winding roll 6 having a large width is formed by the respective guide rollers 2
The second film feeding portion 13 is guided by the rollers 2 and 11 and passes between the two holding rollers 19 and 20, and is held between the two holding bodies 16 and 17.

A connecting arm 23 is projectingly provided at a lower end portion of the both side plates 10, and a movable rod 24 is rotatably supported by a shaft 25 between the connecting arms 23. Below the movable rod 24, an electric motor 27 is attached to a bracket 26 on the machine frame 2 by a shaft 28.
It is rotatably supported by. A female screw portion 29 is attached to the center of the movable rod 24 in the left-right direction, and the electric motor 27
The male screw portion 30 on the output shaft 27a of the
9 is screwed together. Therefore, when the output shaft 27 a of the electric motor 27 rotates, the male screw portion 30 is moved over the female screw portion 2.
9 moves together with the movable rod 24, and the both side plates 10 rotate in the up-down direction about the support shaft 9 via both connecting arms 23. With the rotation, the first film feeding portion 12 can be in a state corresponding to the film feeding position P and the second film feeding portion 13 can be in a state corresponding to the film feeding position P. Has become. In this embodiment, such a driving means is used.

Although not described in detail, the film draw-out member 31 moves on the film feeding position P to move the first or second film.
The film feeding units 12 and 13 are arranged to approach or separate from each other. Then, the film drawer 31 allows the films 5a and 6a in the first or second film feeding units 12 and 13 to be drawn into the packaging unit S.

(Regarding the film folding device 32) Next,
The film folding device 32 shown in FIGS. 1 and 5 to 7 will be described. In the packaging unit S, the left and right movable plates 33 can be moved horizontally in the left and right direction by the respective support rollers 34 on the machine frame 2. Left and right folding members 35 are supported on both movable plates 33 so as to be horizontally rotatable about a shaft 36 and extend rearward. A rotary belt 37 is stretched between both pulleys 38 on both the left and right sides of the machine frame 2, and the left and right ends 39a of the front folding member 39 are connected between the rotary belts 37. The left and right ends 39a of the front folding member 39 are machine frames 2
It is supported so as to be movable in the front-rear direction along the upper rail 40. Long holes 41 are formed in the movable plates 33 so as to extend in the front-rear direction, and guide pins 42 on both left and right ends 39a of the front folding member 39 are engaged with the long holes 41. The guide pin 42 and the left and right folding members 35
Both ends of the link 43 are rotatably supported between and. When the front folding member 39 moves in the front-back direction as the rotary belt 37 rotates, both guide pins 42 move along the long holes 41, and the left and right folding members 35 open and close via the link 43. A rear folding member 44 is supported between the rails 40 behind the front folding member 39 by a link 45 so as to be movable in the front-rear direction.

Although not described in detail, 46 is a heater which is adjacent to the packaging section S and is in front of the front folding member 39, and 47 is below the film winding rolls 5 and 6 and above the film folding device 32. Numeral 48 is a carry-out belt, 48 is a left and right lateral film retainer attached to the lower side of both movable plates 33, and 49 is a rear film retainer attached to the machine frame 2 below the rear folding member 44.

(Regarding the interlocking means between the film feed switching device 1 and the film folding device 32) Next, the side plates 10 of the film feeding switching device 1 and both movable plates 33 of the film folding device 32 are connected. The interlocking means will be described with reference to FIGS.

A lever 50 is supported by the machine frame 2 so as to be rotatable in the front-rear direction by a shaft 51 corresponding to the left and right movable plates 33 of the film folding device 32, and the lever 50 is extended upward. A link 52 is provided on the upper end of the lever 50.
One end of the link is rotatably supported by a shaft 53, and the link 52 extends rearward. The other end of the link 52 is rotatably supported by a shaft 54 with respect to the left and right side plates 10 of the film feed switching device 1. One end of a link 55 is rotatably supported by the lever 50 by a shaft 56, and the other end of the link 55 is supported by the shaft 5 with respect to the movable plate 33.
It is rotatably supported by 7.

When the both side plates 10 of the film feed switching device 1 rotate, the lever 50 rotates via the link 52, and the shaft 56 between the lever 50 and the link 55 moves in the front-rear direction. The movement causes the link 55 and the movable plate 33.
The shaft 57 between and moves to the left and right, the movable plates 33 also move to the left and right, and the interval between them changes.

Therefore, when the first film feeding portion 12 that holds the film 5a having a small width corresponds to the film feeding position P, both movable plates 33 are set at a narrow interval. Further, when the second film feeding portion 13 that holds the film 6a having a large width corresponds to the film feeding position P, both movable plates 33 are set at wide intervals.

(Regarding Automatic Switching of Film Winding Rolls 5 and 6 According to Article Size) As shown in FIG. 1, an article conveying conveyor 58 is installed below the film folding device 32 and the film drawer 31. Transport conveyor 58
Items placed on the tray (things contained in the tray 62)
Are conveyed toward the article receiving tray 59 at the lowest position. The article cradle 59 is configured to move up and down between the lowest position and the packaging section S in the film folding device 32. An article size detecting means 60 (for example, one utilizing three photoelectric switches) is installed on the article carrying conveyor 58. During the transportation of the tray 62, the article size detecting means 60 detects the length L of the tray 62.
(Dimension in the left-right direction orthogonal to the transport direction) and width W (dimension in the transport direction) are detected.

The detection data regarding the length L and the width W are input to the controller 61. The controller 61 calculates this length L and determines whether or not this length L is equal to or greater than the set length Lo.
Then, in the controller 61, this length L is the set length Lo.
When it is determined that the following is the case, the use instruction of the film winding roll 5 having a small width is issued to the film feed switching device 1
It is designed to be sent to the electric motor 27. When the controller 61 determines that the length L is equal to or longer than the set length Lo, the film winding roll 6 having a large width size is used.
Is sent to the electric motor 27. The electric motor 27 is drive-controlled based on these commands, and any one of the first film feeding portion 12 and the second film feeding portion 13 corresponds to the film feeding position P. .

(Outline of Wrapping Action) Next, an outline of the wrapping action will be described centering on the film feed switching device 1 and the film folding device 32.

When the article size detecting means 60 detects the tray 62 moving on the article conveying conveyor 58, the length L and the width W thereof are input to the controller 61, and the controller 68 causes the film feed switching device to operate based on the input signal. 1
The electric motor 27 is driven and controlled. For example, the tray 62
If the length L is less than or equal to the set length Lo, the controller 61
When it is determined that the first film feeding unit 12 corresponds to the film feeding position P, both movable plates 33 of the film folding device 32 are linked to the first film feeding unit P and the left and right folding members 3
5 and 5 are set at narrow intervals. And the tray 62
Stops on the article cradle 59.

On the other hand, the film drawer 31 approaches the first film feeding section 12 to grip the film 5a, and then separates from the first film feeding section 12 and the film 5a is drawn out to the packaging section S. The article size detecting means 60
Based on the width W of the tray 62 detected by the controller 61, the controller 61 drives and controls the separation distance of the film drawing body 31, and the drawing size of the film 5a is set. After pulling out the film 5a, the film 5a is held by the left and right lateral film pressers 48 and the rear film presser 49.

Next, when the article cradle 59 moves up to the packaging section S together with the tray 62 and the cutter 59a, the film 5a
Is lifted by the tray 62 and cut by the cutter 59a. At this time, since the fixed holding roller 20 provided adjacent to the first film feeding unit 12 cannot be rotated by the electromagnetic brake 21, the film 5
a is a film winding roll 5 at the time of cutting by the cutter 59a
Is never drawn from. Then, the folding of the film 5a into the tray 62 is performed as follows.

First, when the front folding member 39 approaches the rear folding member 44 in the retracted position, the left and right folding members 35 close each other, and the film 5a is below the tray 62 in three directions by the folding members 35, 39. Folded from Then, the front and rear folding members 39 and 44 both move forward in a state where the tray 62 is pressed from above by the carry-out belt 47, the film 5a is folded under the tray 62, and the folding portions are overlapped with each other. . According to the folding timing, the gripping of the film 5a by the film draw-out body 31, the left and right lateral film retainers 48, and the rear film retainer 49 is released.

Next, when the carry-out belt 47 rotates and the front folding member 39 moves further forward, the tray 62 is moved.
Is carried out toward the heater 46 while being placed on the front folding member 39. The tray 62 is temporarily stopped on the heater 46, and the film 5a is adhered to the lower side of the tray 62 by heat. The tray 62 thus packaged is sent to the carry-out conveyor 63 by the rotation of the carry-out belt 47.

The above wrapping action is the same when the second film feeding portion 13 corresponds to the film feeding position P. In the above-described embodiment, in the film feed switching device 1, the switching between the film feeding portions 12 and 13 is automatically performed by the electric motor 27, but the switching may be performed manually. Further, although the first and second film feeding units 12 and 13 are provided in the film feeding switching device 1 in the above-described embodiment, the number of film feeding units and film winding rolls installed may be three or more. Good. Further, in the above embodiment, only one example of the film folding device 32 is shown, and the rear folding member may be set at a fixed position as shown in, for example, Japanese Patent Laid-Open No. 62-193909.

[0031]

According to the present invention, the package feeding / switching device 1 and the package folding device 3 whose position can be adjusted according to the size of the article.
2, the position adjusting drive means can be unified, and the structure is simplified.

[Brief description of drawings]

FIG. 1 is a schematic side view of a packaging machine according to this embodiment.

FIG. 2 is a side sectional view showing a state in which a film winding roll having a small width size is used in the film delivery switching device according to the present embodiment.

FIG. 3 is a side cross-sectional view showing a state in which a film winding roll having a large width size is also used.

FIG. 4 is a partially cutaway plan view showing the film feeding / switching device shown in FIG.

FIG. 5 is a partially cutaway plan view showing a state where a film winding roll having a small width is used in the film folding device according to the present embodiment.

FIG. 6 is a side view showing an interlocking mechanism between the film feed switching device and the film folding device in the state shown in FIG.

FIG. 7 is a side view of the interlocking mechanism showing a state in which a film winding roll having a large width is used.

[Explanation of symbols]

1 film feeding switching device, 5 film winding roll,
5a film, 6 film take-up roll, 6a film, 10 side plate as movable member, 12 first film feeding unit, 13 second film feeding unit, 27 electric motor, 32 film folding device, 33 movable plate, 35 left and right folding members, 39 front folding members, 44 rear folding members,
50 lever, 52 link, 55 link, 59
Article cradle, 60 article size detecting means, 62 tray,
L tray length, S packaging section, P film feeding position.

Claims (1)

[Claims] 1. A package delivery switching device (1) comprising:
The movable member (10) is provided with two or more package feeding parts (12, 1).
3) is provided so that any one of the package delivery parts (12, 13) corresponds to the package delivery position (P) according to the movement of the movable member (10), and the package folding device (32). ), A front folding member (39) and a rear folding member (44) which are relatively movable in the front-rear direction are provided on both front and rear sides facing each other in the packaging section (S), and are orthogonal to the front-rear direction. Both left and right movable members (3
3) The left and right folding members (35) are rotatably supported in the left and right directions so that the folding members (39, 44, 35) approach or separate from each other in the packaging section (S). The movable member (10) of the package feeding / switching device (1) and the left and right movable members (33) of the package folding device (32) are connected by interlocking means (50, 52, 55) and both movable. A packaging machine provided with drive means (24, 27, 29, 30) for moving any one of the members (10, 33).