JP2620460B2 - Packaging machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION This invention relates to a packaging machine <br/> for wrapping the stretch film dish containing for example perishable goods, in particular, switchable off <br/> the type of film to be out feeding Film feeding changeover device and insertion interval corresponding to film width
The present invention relates to a packaging machine having an adjustable film folding device.

[0002]

2. Description of the Related Art Conventionally, as this type of film supply switching device, there is one disclosed in, for example, JP-A-53-61494. In this apparatus, the leading ends of the films drawn out from both film winding rolls having different width sizes are respectively gripped by a film supply unit, and one of the two supply units is manually switched to be used. It corresponds to the supply position.

[0003] As a conventional film folding device,
For example, there is one disclosed in JP-A-62-193909. In this apparatus, the front and rear and left and right folding members for folding the film below the tray are provided, and the interval between the rotation fulcrums of the left and right folding members can be adjusted according to the size of the tray.

[0004] However, all of these devices have a movable section provided with a film supply section or the like according to the size of the tray.
It has the ability to the position adjustment of the wood, their tone
The verses were performed individually.

Accordingly, the present invention provides a film feed switching device.
And movable member in film folding device
The movable member of either device is moved
The moving force of one of the movable members.
The movable part of the other device whose moving direction is different from that of the other movable member
The purpose was to be able to move the material.

[0006]

In order to achieve the above object,
Therefore, in the present invention, the film feeding switching device 1 includes:
Two or more movable members 10 are provided so as to be rotatable in the vertical direction.
The film supply units 12 and 13 are provided, and the movable member 10
As the film is turned, one of the film feeding units 12 and 13
Lum feeding position P, and insert the film
In the device 32, the packing unit S moves in the left-right direction.
The left and right folding members 35 are attached to the left and right movable members
Are supported rotatably in the left-right direction, and both folding members 35
So as to approach or separate from each other at the
Movable member 10 of the film feed-out switching device 1 and the film folding device
The movable member 33 of the device 32 is connected to one of the movable members 10 and 33.
Movement of the other movable member 33, 10 by the operating force in the movement direction
Connecting mechanism 50, 5 for converting the operating force to the direction and transmitting it
The fact that they were linked by 2,55 was adopted.

[0007]

[0008]

Therefore, according to the present invention, the size of the article is adjusted.
The film feed switching device 1 or the film folding device 32
Move the movable members 10 and 33 of either device
Then, in the moving direction of the movable members 10 and 33
Of the other device by the coupling mechanisms 50, 52, 55
Of the other movable member 33, 10
10 to be transmitted to the operating force in the moving direction.
You. Therefore, the movable members 10 and 33 of one device are moved.
The other device is activated by the operating force during the movement.
The moving members 33 and 10 also move.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A stretch film packaging machine according to one embodiment of the present invention will be described below with reference to the drawings, focusing on a film supply switching device and a film folding device.

(Regarding Film Feeding Switching Apparatus 1) First, the film feeding switching apparatus 1 shown in FIG. 1 and FIGS. At the uppermost part of the machine frame 2, both front mounting rollers 3 and rear mounting rollers 4 are provided, respectively. The film take-up roll 5 having a small width is placed on both the placement rollers 3 on the front side. The film take-up roll 6 having a large width is placed on both the placement rollers 4 on the rear side. Each of the film winding rolls 5, 6 is positioned by both holding plates 7, 8 on one of the loading rollers 3, 4.

A support shaft 9 is provided at an intermediate portion in the vertical direction at the rear of the machine casing 2.
Are supported rotatably in the horizontal direction in the left and right direction, and side plates 10 as movable members are attached to both left and right ends of the support shaft 9 so as to be integrally rotatable. A guide roller 11 is inserted between the two side plates 10 on the outer periphery of the support shaft 9. This side plate 1
Reference numeral 0 protrudes forward, and film supply 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 operation lever 14 is supported by both side plates 10 so as to be rotatable about a shaft 15, and a comb-shaped movable holding member 16 is provided between the operation levers 14. Is attached. This movable gripper 1
A comb-shaped fixed holding body 17 is provided between the two side plates 10 above the 6. Both operating levers 14 are urged by a torsion coil spring 18 on a shaft 15, and the movable holding body 16 is pressed against the fixed holding body 17 by the urging force. A movable holding roller 19 is provided between the operation levers 14 between the grippers 16 and 17 and the support shaft 9. A fixed holding roller 20 is provided between the two side plates 10 above the movable holding roller 19. The movable holding roller 19 is also fixed to the fixed holding roller 2 by the urging force of the torsion coil spring 18.
It is pressed against zero. 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 two electromagnetic brakes 21.

The film 5a pulled 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 supply section 12 by the two holding rollers 1.
It passes between 9, 20 and is sandwiched between both holding bodies 16, 17. The film 6a pulled out from the film take-up roll 6 having a large width is
Guided by the rollers 2 and 11, the second film feeding portion 13 passes between the holding rollers 19 and 20 and is held between the holding members 16 and 17.

A connecting arm 23 projects from the lower end of the both side plates 10, and a movable rod 24 is rotatably supported between the connecting arms 23 by a shaft 25. An electric motor 27 is attached to a bracket 26 on the machine frame 2 below the movable rod 24 by a shaft 28.
To be rotatable. A female screw 29 is attached to the center of the movable rod 24 in the left-right direction.
The male screw part 30 on the output shaft 27a of the
9. Therefore, when the output shaft 27a of the electric motor 27 rotates, the female screw 2
9 moves together with the movable rod 24, and the both side plates 10 rotate up and down around the support shaft 9 via both connecting arms 23. With the rotation, the first film supply unit 12 can take a state corresponding to the film supply position P and the second film supply unit 13 can take a state corresponding to the film supply position P. Has become. In this embodiment, such a driving means is used.

Although not described in detail, the film drawer 31 moves on the film supply position P to move the first or second film drawer 31.
To or away from the film supply units 12 and 13. Then, the films 5a and 6a in the first or second film supply portions 12 and 13 are drawn out to the packaging portion S by the film drawer 31.

(Regarding the film folding device 32)
The film folding device 32 shown in FIG. 1 and FIGS. In the packaging section S, the left and right movable plates 33 can be horizontally moved in the left and right directions by the respective support rollers 34 on the machine frame 2. On both movable plates 33, left and right folding members 35 are supported rotatably in the horizontal direction about a shaft 36 and extend rearward. A rotating belt 37 is stretched between both pulleys 38 on both left and right sides in the machine frame 2, and left and right ends 39 a of the front folding member 39 are connected between the two rotating belts 37. The left and right ends 39a of the front folding member 39
It is supported so that it can move in the front-back direction along the upper rail 40. An elongated hole 41 is formed in each of the movable plates 33 so as to extend in the front-rear direction, and guide pins 42 on both left and right end portions 39 a of the front folding member 39 are engaged with the elongated hole 41. The guide pin 42 and the left and right folding members 35
Both ends of the link 43 are rotatably supported between the two. Then, when the front folding member 39 moves in the front-rear direction with the rotation of the rotating belt 37, both the guide pins 42 move along the long holes 41, and the left and right folding members 35 open and close with each other via the link 43. A rear folding member 44 is supported by a link 45 behind the front folding member 39 and between both rails 40 so as to be movable in the front-rear direction.

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

(Regarding the coupling mechanism between the film feeding switching device 1 and the film folding device 32) Next, the both side plates 10 of the film feeding switching device 1 and the two movable plates 33 of the film folding device 32 are connected. 4 through a connecting mechanism for connecting the
This will be described with reference to FIG.

A lever 50 is supported on the machine frame 2 by a shaft 51 so as to be rotatable in the front-rear direction, corresponding to the left and right movable plates 33 of the film folding device 32. The lever 50 extends upward. A link 52 is provided at the upper end of the lever 50.
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 supply switching device 1. One end of a link 55 is rotatably supported on the lever 50 by a shaft 56, and the other end of the link 55 is
7 rotatably supported.

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 to move.
Is moved in the left-right direction, the movable plates 33 also move in the left-right direction, and the distance between them changes.

Therefore, when the first film feeding portion 12 for holding the film 5a having a small width corresponds to the film feeding position P, the movable plates 33 are set at a narrow interval. When the second film feeding portion 13 for holding the film 6a having a large width size corresponds to the film feeding position P, the movable plates 33 are set at a wide interval.

(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. Conveyor 58
Placed on the tray (with the contents placed in the tray 62)
Are conveyed toward the article receiving stand 59 at the lowest position. The article receiving table 59 moves up and down between the lowermost position and the packaging section S in the film folding device 32. An article size detecting means 60 (for example, using three photoelectric switches) is installed on the article transport conveyor 58. During the conveyance of the tray 62, the article size detecting means 60 adjusts the length L of the tray 62.
(The dimension in the left-right direction orthogonal to the transport direction) and the width W (the dimension in the transport direction) are detected.

The detection data relating to the length L and the width W is input to the controller 61. The controller 61 calculates the length L and determines whether or not the length L is equal to or longer than the set length Lo.
The controller 61 determines that the length L is equal to the set length Lo.
If it is determined that the following conditions are satisfied, the use instruction of the film winding roll 5 having a small width is transmitted to the film feeding switching device 1.
To the electric motor 27. If the controller 61 determines that the length L is equal to or greater than the set length Lo, the controller 61 determines that the film winding roll 6 having a large width size is to be used.
Is sent to the electric motor 27. The drive of the electric motor 27 is controlled based on these commands, and one of the first film supply unit 12 and the second film supply unit 13 corresponds to the film supply position P. .

(Outline of Wrapping Operation) Next, the outline of the wrapping operation will be described mainly with respect to the film feeding 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, its length L and width W are inputted to the controller 61, and based on the input signal, the controller 68 operates the film feed switching device. 1
Of the electric motor 27 is controlled. For example, tray 62
If the length L is equal to or less than the set length Lo, the controller 61
Is determined, the first film feeding unit 12 corresponds to the film feeding position P, and in conjunction with this, both movable plates 33 of the film folding device 32 move the left and right folding members 3.
5 is set at a narrow interval. Then, the tray 62
Stops on the article receiving table 59.

On the other hand, the film drawer 31 approaches the first film feeder 12 and grips the film 5a, and then separates from the first film feeder 12 to draw the film 5a to the packaging section S. The article size detecting means 60
Based on the width W of the tray 62 detected by the controller 6, the controller 61 controls the drive of the separation distance of the film drawer 31, and the drawer size of the film 5a is set. After the film 5a is pulled out, the film 5a is clamped by the left and right horizontal film presses 48 and the rear film press 49.

Next, when the article receiving table 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 clamping roller 20 provided adjacent to the first film supply portion 12 is not rotatable by the electromagnetic brake 21, the film 5
a is a film take-up roll 5 at the time of cutting by the cutter 59a.
Will not be 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 at the retracted position, the left and right folding members 35 are closed to each other, and the film 5a is placed under the tray 62 by the folding members 35 and 39 in three directions. Folded from. Then, while the tray 62 is pressed from above by the carry-out belt 47, the front and rear folding members 39 and 44 both move forward, the film 5a is folded under the tray 62, and the folded portions are overlapped with each other. . In accordance with the folding timing, the gripping of the film 5a by the film drawer 31, the left and right horizontal film presses 48 and the rear film press 49 is released.

Next, when the carry-out belt 47 rotates and the front folding member 39 further moves forward, the tray 62
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 brought into close contact with the heat below the tray 62. The tray 62 packaged in this way is sent to the carry-out conveyor 63 by the rotation of the carry-out belt 47.

The above-mentioned wrapping operation is the same when the second film feeding section 13 corresponds to the film feeding position P. In the above-described embodiment, the switching between the two film feeding sections 12 and 13 is automatically performed by the electric motor 27 in the film feeding switching apparatus 1, but the switching may be performed manually. Further, in the above-described embodiment, the first and second film feeding portions 12 and 13 are provided in the film feeding switching device 1. However, the number of the film feeding portions and the film winding rolls may be three or more. Good. Further, in the above-described embodiment, only an example of the film folding device 32 is shown. For example, as shown in JP-A-62-193909, the rear folding member may be set at a fixed position.

[0031]

According to the present invention, a film feed switching device is provided.
And movable member in film folding device
However, even if the drive mechanism is not branched from the drive source,
The movable member of one of the devices is driven to move.
When moving, one of the two
The movable member of the other device whose moving direction is different from that of the movable member
Can also be moved at the same time through the coupling mechanism, packaging
Of the film feeding switching device and the film folding device in the machine
The interlocking configuration can be simplified.

[Brief description of the drawings]

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

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

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

FIG. 4 is a partially cutaway plan view showing the film supply switching device shown in FIG. 2;

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

FIG. 6 is a side view showing an interlocking mechanism between the film feeding 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 supply switching device, 5 film take-up roll,
5a film, 6 film take-up roll, 6a film, 10 side plate as movable member, 12 first film supply section, 13 second film supply section, 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 receiving tray, 60 article size detecting means, 62 trays,
L Tray length, S wrapping part, P film feeding position.

Claims (1)

(57) [Claims] In a film feeding switching device (1), a movable member (10) rotatably provided in a vertical direction is provided with two or more film feeding portions (12, 13). With the rotation of the movable member (10), one of the film feeding portions (12, 13) is made to correspond to the film feeding position (P), and in the film folding device (32), the packaging portion is provided. left and right movable member provided to be movable in the left right direction keep <br/> the (S) (3
3) the left and right folding members (35) and rotatably supported in the lateral direction, the two folding members (35) is so as to approach or separate from each other in the packaging unit (S), said film feed can conversion device (1) the film folding device and the movable member (10) of the (32) of variable rotary members (33)
The operating force in the moving direction of one movable member (10, 33)
The operating force of the other movable member (33, 10) in the moving direction
Packaging machine, characterized in that the <br/> consolidated by a connection mechanism for transmitting converted to (50,52,55).