JPH0234167Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a film roll fixing device for fixing a stretch film film roll in a packaging machine that wraps items to be packaged with stretch film.

[Prior art]

Many years have already passed since packaging machines for wrapping items in dish-shaped containers with transparent stretch film have been put into practical use. During this time, various packaging machines have been provided and improvements have also been made. This is also the case with film roll fixing devices for supplying film to packaging machines, and conventional film roll setting generally involves passing a shaft 2 through a hole in the center of a film roll 1, as shown in FIG. This was done by fixing flanged stoppers 3 at both ends with screws 4.

[Problem that the invention attempts to solve]

However, in the conventional film roll fixing method described above, when replacing the film roll, the shaft 2
After removing the old paper tube left on the shaft 2 by loosening the screw on the stopper 3, pass the shaft 2 through the hole in the center of the film roll and tighten the screw 4 on the stopper 3 again. Not only does it have the disadvantage of having to remove stopper 3, but since stopper 3 is fixed with screw 4,
Another disadvantage was that the screw 4 loosened due to vibration and the stopper 3 came off.

The present invention has been developed in view of the above-mentioned problems, and an object of the present invention is to provide a film roll fixing device that allows film rolls to be easily exchanged and positioned.

[Means for solving problems]

In order to solve the above problems, the present invention has developed a film roll fixing device using two rotatable rollers arranged parallel to each other with a predetermined gap, and a guide bar arranged parallel to the two rollers. , comprising an adsorption magnet that slides along the guide bar.
It is composed of two stopper plates that are brought into contact with both ends of a film roll placed on a book roller to position the film roll, and an abutment plate that attracts the attracting magnet of the stopper plate.

[Effect]

By configuring the film roll fixing device as described above, first, the stopper plate is fixed at a predetermined position on the guide bar by adsorbing one of the two stopper plates to a predetermined position on the plate. Then, the film roll is placed on two rollers with one end in contact with the stopper plate, and then the other stopper plate is brought into contact with the other end of the film roll, and the attraction magnet is placed on the stopper plate. The film roll can be positioned and set with a simple operation of suction.

〔Example〕

An embodiment of the present invention will be described below based on the drawings.

FIG. 1 is a front view showing the structure of a film supply section of a packaging machine equipped with a film roll fixing device according to the present invention, FIG. 2 is a sectional view taken along line A-A' in FIG. 1, and FIG. It is a sectional view taken along the line BB' in the figure. In the figure,
1 and 2 are rollers that support a film roll F1 that is arranged in parallel with a predetermined gap l, and the rollers 1 and 2 are rotatably supported on a packaging machine frame 3 by a support member 4. . A guide bar 5 is provided below the gap l between the rollers 1 and 2 in parallel with the rollers 1 and 2, and both ends of the guide bar are fixed to the packaging machine frame 3 by support members 6.
Reference numerals 7 and 8 indicate stopper plates for positioning and setting the film roll F1, and the stopper plates 7 and 8 are fixed to sliding supports 9 and 10, respectively, which are slidably fitted into the guide cover 5. and is slidable along the guide bar 5. Sliding supports 9 and 10 are provided with adsorption magnets 11 and 1 for fixing stopper plates 7 and 8 at predetermined positions on guide bar 5, respectively.
2 is fixed. Reference numeral 13 indicates a corresponding plate 1 which is a contact plate made of an iron plate that attracts the above-mentioned attraction magnet.
3 is a predetermined gap with the guide bar 5, that is, a gap is formed so that when the attraction magnet 12 is attracted to the contact plate 13, the stopper plates 7 and 8 are located perpendicularly to the substantially center of the gap 1 between the rollers 1 and 2. and arranged parallel to the guide bar 5. Note that 19 is a scale plate that displays the position of the stopper plate 7. Brakes 14 are provided at both ends of the roller 1, and the brakes 14 include two brake shoes 14.
a and the frame 1 to which the brake shoe 14a is fixed.
4b, and a plate body 14c having a substantially L-shaped cross section and fixing the frame body 14b. One end of the plate 14c is swingably supported on the shaft 12a of the roller 2, and the other end is provided with an elongated hole 14d through which the shaft of a guide roller 15 for guiding the film moves up and down. Further, one end of the plate 14c is biased by a coil spring 16, so that the brake shoe 14a is pressed against the surface of the roller 1 with a predetermined pressure. The same structure as the rollers 1, 2 and the guide bar 5 are provided below the rollers 1, 2 for positioning and setting the film roller F2, but their explanation will be omitted.

Reference numeral 17 denotes an indicator for adjusting the spacing between the chain conveyors, which will be described later.The width between the chain conveyors is adjusted by operating the handle 18 while observing the position of a pointer 17a on the indicator 17. Therefore, the position of the pointer 17a indicates the width of the film to be used.

FIG. 4 is a plan view showing the film transport mechanism and film input mechanism of the packaging machine.

In the figure, 41 is a film transport mechanism that transports the film along a film path, 42 is a film input mechanism that feeds the film into the film transport mechanism 41, and 43 is disposed between the film transport mechanism 41 and the film input mechanism 42. This is a cutter mechanism that cuts the film. The film transfer mechanism 41 includes a chain conveyor 44 that engages with a sprocket to operate, a rubber belt 45 that is made up of a round rubber belt that engages on the outer periphery of the chain conveyor 44 and operates in conjunction with the chain conveyor 44. It is composed of a plurality of grippers 46 that hold both sides of the film between them. On the starting end side of the film transfer mechanism 1, a timing belt 47 is disposed inside the chain conveyor 44 in parallel with the chain conveyor 44. A pressing member 48 is provided.

The timing belt 47 is a belt having a shape in which unevenness is provided at regular pitches parallel to the upper and lower surfaces, and is driven by a timing pulley 49 having unevenness on the peripheral surface that fits into the unevenness. Further, the timing pulley 49 is configured to rotate in conjunction with a sprocket (not shown) that drives the chain conveyor 44, so that the timing belt 47 and the chain conveyor 44 operate in synchronization.

The film input mechanism 42 includes a film feed roller 50, a film guide plate 51, and the like. The film feed roller 50 is supported by the packaging machine frame through bearings 52 at both ends, and is configured to rotate in conjunction with the chain conveyor 44, and is configured to rotate in conjunction with the chain conveyor 44.
Unwind the film from 2 and press the film guide plate 51.
It is fed between the pressing member 48 and the timing belt 47 by passing through the upper surface of the belt.

The width interval of the film transport mechanism 41 is adjusted by operating the handle 18 and adjusting the interval between the chain conveyors 44, 44 by a mechanism (not shown).

In the above configuration, the operation for setting the film roll F1 will be explained. First, handle 1
8 to adjust the distance between the chain conveyors 44, 44 to the width of the film roll F1 to be used.
In conjunction with the movement of the chain conveyor 44, the pointer 17a of the display 17 moves on the scale plate 17b to indicate the reference position at which the film roll F1 to be used is set. The operator slides the stopper plate 7 along the guide bar 5 while looking at the reference position of the display 17, and when the stopper plate reaches the reference position of the scale plate 19, the operator touches the attraction magnet of the stopper plate 7. Adsorb it to the plate 13 (stopper plate 7
(from the inclined position shown by the two-dot chain line in FIG. 3 to the vertical position shown by the solid line), and the stopper plate 7 is fixed.
Next, the film roll F1 is placed on the rollers 1 and 2 with its ends abutting against the stopper plate 7. Next, the stopper plate 8 is slid along the guide rail 5, and is fixed by coming into contact with the other end of the film roll F1. This completes the setting and positioning of the film roll F1.

Next, the end of the film f1 is pulled out from the film roll F1, guided upward along the surface of the roller 1 and the guide roller 15, and passed onto the timing belt 47 through the surface of the feeding roller 50 and the surface of the guide plate 51. Place the other end. The film f1 placed on the timing belt 47 is connected to the timing belt 47 and the pressing member 4.
8, and moves forward while being held between rubber belts 45 and grippers 46 on both sides. When the film f1 is pulled by the film transport mechanism 41, the guide roller 15 rises along the elongated hole 14d, and when the axis of the guide roller 15 reaches the upper limit of the elongated hole 14d, the plate 14c is pulled upward and the brake is applied. Show 1
4a is spaced apart from the surface of the roller 1, and the brake 14
The film roll F1 is rotated on rollers 1 and 2, and the film roll F1 is smoothly fed out.
The tension of the film f1 is loosened (film transport mechanism 4
1 stops) and the brake 14 is a coil spring 16
, the roller 1 is braked and the film roller F1 is stopped.

The setting and positioning of the film roll F2 can be performed by the same operations as described above, so the explanation thereof will be omitted.

In the above embodiments, the film transport mechanism 41 is merely an example, and it goes without saying that the film roll fixing device of the present invention can also be applied to film transport mechanisms of other packaging machines.

[Effect of idea]

As explained above, according to the present invention, one of the two stopper plates is fixed in a predetermined position, and then the film roll is placed on the two rollers with one end in contact with the stopper plate. After that, the film roll can be set and positioned by an extremely simple operation of bringing the other stopper plate into contact with the other end of the film roll and fixing it, which is an extremely excellent effect.

In addition, even if the left and right protrusion amounts of the film roll core are different, the left and right stopper plates can be moved separately to position the film roll, so the film roll can be positioned so that the film is always in the correct position. An excellent effect can also be obtained.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the structure of a film supply section of a packaging machine equipped with a film roll fixing device according to the present invention, FIG. 2 is a sectional view taken along line A-A' in FIG. 1, and FIG. FIG. 4 is a plan view showing the film transport mechanism and film input mechanism of the packaging machine, and FIG. 5 is a diagram showing the structure of a conventional film roll fixing device. In the figure, 1, 2...roller, 3...packaging machine frame,
4... Supporting member, 5... Guide bar, 6... Supporting member, 7, 8... Stopper plate, 9, 10... Sliding support, 11, 12... Adsorption magnet, 13
...Plate, 14...Brake, 15...Guide roller, 16...Coil spring, 17...Indicator, 1
9...Scale plate.

Claims (1)

[Claims for Utility Model Registration] Two rotatable rollers arranged in parallel with a predetermined gap, a guide bar arranged in parallel to the two rollers, and a guide bar placed on the two rollers. two stopper plates facing both ends of the placed film roll and capable of independently sliding movement along the guide bar; provided on each of the two stopper plates;
A film roll fixing device for a packaging machine, comprising: an adsorption magnet for fixing the stopper plate; and a plate for adsorbing the adsorption magnet and fixing the stopper plate.