JPS6032036Y2 - Continuous sheet feeding device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a continuous sheet feeding device that changes original sheet material one after another and feeds the sheets without interruption in order to process or rewind various strip-shaped sheets.

Conventionally, as this type of continuous sheet feeding device, the
7-407M 'A device for creating a butt joint between a running old web and a new web. The running sheet is rotated in advance with a required torque by a roller (such as a roller, etc.), and on the other hand, a pressing roller provided separately from the above means presses and adheres the running sheet to an adhesive surface provided on a new original fabric, thereby stopping the running of the sheet. There is a format in which sheets are supplied without any problems.

However, the above method requires separate means for driving the new web and means for gluing the traveling sheet and the new web, so the space occupied by the device increases;
The problem is that it costs a lot of money. ■Since two types of rollers are pressed against the new material during gluing, the design and work must be done in a way that does not interfere with the functions of each. For example, when stamping the adhesive surface on the original fabric at the preparatory stage, it is necessary to remove the contact point of the adhesive surface with the a-ra etc. to increase speed, and the work is slow. The problem is that it is troublesome,
■Related to the above point, rollers, etc. for increasing the speed of the original fabric have no choice but to have only a partial length in the width direction of the original fabric, so they have a large drive force relative to the original fabric. The problem is that it is not possible to apply force, and therefore it is necessary to rotate the new fabric many times before rotating it with the required torque, which takes a lot of time.■The adhesive surface formed on the fabric is also
As in case (■) above, since the adhesive is only partially attached in the width direction of the original fabric, the traveling sheet and the new original fabric are only partially adhered, and the sheet processing process after adhesion causes severe damage. When the sheet tension fluctuates, there is a problem that poor adhesion and sheet defects are likely to occur.

Therefore, it is an object of the present invention to provide an apparatus that can continuously supply sheets without the above-mentioned disadvantages using a simple mechanism.

FIG. 1 is a front explanatory view showing one embodiment of this invention, the main part of which is a turret in which a plurality of web shaft supports 1 sequentially move to respective positions for loading and unwinding the web and for completing the rewinding. type original fabric support device 2 and its unwinding position A to unwinding end position B
The sheet pressing means 3 presses the running sheet S coming out of the raw web R□ that has moved to the surface of the raw web R2 that has newly entered the rewinding position A, and the new raw sheet that has started rotation due to this pressing is The adhesive surface of the tip of the sheet opposite R2 is adhered to the running sheet 8 at the pressing position of the pressing means 3.

The original fabric support device 2 of this embodiment is not much different from the conventional alternating type.

In other words, the original fabrics R□ and R2 are supported between the supporting members at the ends of both rotating arms, rotated 180 degrees, and a new fabric is transferred to the unwinding position as before, but during unwinding the original fabrics are rotated an additional 180°.
Using a method of rotating and moving from the rewinding position A to the rewinding end position B (also the original web device position) and fixing it, the center of the rotating arm is placed between the web shaft supports 1 and 1. It has sheet support rollers 5 on both sides that are pivotally supported by short arms protruding from both sides and rotate together.

In the case of this invention, the consumption of the original fabric R1 is monitored by eyes or phototubes, and immediately before the sheet is used up, as shown in FIG.
Move this from position A to position B.

At the same time, the raw material R2, which has been loaded and waiting at the position B, comes out to the rewinding position A.

At this time, the traveling sheet S drawn out from the first web R1 advances past the support rollers 5 and the new web R2.

Therefore, the connecting machine frame 6 that approaches and moves away from the traveling sheet S is brought into close proximity along the traveling sheet S by a fluid pressure cylinder 6a that is a driving mechanism, and the sheet pressing means 3 is actuated.

That is, the fluid pressure cylinder 3a lowers the pressing roller 3b, which is driven synchronously with the sheet pull-out drive motor 11 via the intermediate shaft 10 of the check 77.8.9, to press the traveling sheet against the surface of the raw fabric R2.

Then, the movement of the running sheet S and the drive of the pressing roller 3b are transmitted to the raw fabric R2 through friction, causing it to rotate in a driven manner.

FIG. 1 shows a state in which the raw fabric R2 has started to rotate in a driven manner.

For example, double-sided adhesive tape T is attached to the sheet end of the raw fabric R2.
As shown in Figure 3, prepare the adhesive part and, if automated, a mark such as a piece of paper P that protrudes slightly to the outside of the sheet width.

The raw web R2 reaches the required torque within one rotation after being rotated by the pressing of the pressing roller 3b having a length corresponding to the width of the sheet, and the adhesive portion at the leading edge of the sheet reaches a position where it comes into contact with the running sheet due to the rotation. Sheet S and pressing roller 3
When it passes under b, adhesion is performed, and at the same time, the above-mentioned mark is detected by a phototube or the like to confirm the completion of the connection.

Therefore, the trailing end of the sheet S of the original fabric R□ which is no longer needed is cut off by the operator's hand or by a command from the phototube or the like.

When attaching the original fabric R2, lightly glue the tip of the sheet so that it does not sag.

This cutting operation is performed by a cutting means 4 having a fluid pressure shaft 4a and a blade 4b that is longer than the entire width of the sheet S and is moved by the fluid pressure shaft 4a. 12a lowers the push roller 12 which performs a braking action, and the sheet S is pressed against the support roller 5.

A blade 4b is provided between the rollers 12 and 3b so that the cutting is performed between the rollers 12 and 3b, which press the sheet S so that it does not loosen.

According to this embodiment, the running sheet is cut between the contact points of the sheet support roller, its pressing roller, and the new original fabric, which are relatively short distances, and the sheet is easily stretched due to its material. , it is possible to cut even difficult-to-cut traveling sheets extremely reliably, and even after the entire web has been rewound, before the trailing edge reaches the contact point between the sheet support roller and its pressing roller. If there is, adhesion and cutting operations can be performed, so the raw sheet can be supplied extremely efficiently.

Note that when not in use, the connecting machine frame 6 may be separated from the original fabric support device 2 by the aforementioned fluid pressure cylinder 6a.

The remaining part of the raw fabric R1 that is no longer needed is dropped to the left in the figure by the rotation of the discharge arm 13.

When the arm 13 completes discharge and returns to the position shown in the figure, it may roll the original fabric carried by the conveyor 14 onto the elevator 15.

Now, the drawn-out new sheet S of the original fabric R2 adhered to the previous running sheet S is first received by the dancer roller 16, passes through the pinch roller 17 and the brake roller 18, and enters the sheet processing section 19.

In the sheet processing section 19 in which one end of the connecting machine frame 6 is pivotally connected to the brake roller 18 side, the sheet tension must always be constant at an appropriate strength.

Therefore, in this device, a pinch roller 20 for drawing out the sheet is provided ahead of the sheet processing position, and a brake roller 18 that rotates in conjunction with the pinch roller 20 is provided in front of the processing position. The braking action of the brake roller 18 is automatically adjusted according to the command.

That is, the rotation of the constant speed motor 11, which is a DC motor with regenerative braking control, is transmitted to the pull-out pinch roller 20 via the reducer and the check 7, and at the same time is transmitted to the brake roller 18 via the intermediate shaft 10 and the check 79. ing.

In this interlocking relationship, the speed of the pinch roller 20 is set higher than that of the brake roller 18.

If the brake roller 18 is equipped with, for example, an electromagnetic powder brake, and its control device is controlled by the command current of the tension detection device 21, it is possible to maintain a desired constant braking force and thus the sheet tension.

The brake roller 18 is interlocked with the pinch roller 17 via two gears, and the pinch roller 17 is for blocking the unwinding tension from affecting the sheet tension in the processing section 19.

In particular, when a new web is started, a strong instantaneous tension is generated in the sheet S, so the dancer roller 16 is rotated downward in the figure to prevent an impact change.

When winding up the sheet after processing, the sheet tension suitable for winding is insulated from the tension of the processing section 19 by the pinch rollers 20, so that the tension suitable for each can be maintained.

One embodiment has been described above, and the feature of this invention is that it uses an alternating type web support device to move the web that is nearing the end of rewinding, and the traveling sheet is driven synchronously by the sheet pull-out mechanism. By pressing a new sheet with a pressing roller, it is driven by friction and the edges of the sheet are bonded at the same time.During implementation, various changes and applications are made depending on the designer's known technology. Of course.

According to the present invention, the new original fabric is driven and the traveling sheet and the new original fabric are bonded together by the pressing roller which is synchronously driven by the sheet pull-out mechanism, so that the apparatus can be simplified and costs can be reduced.

In addition, since the length of the pressing roller is not restricted as in the past, it can be set to a length that corresponds to the width of the sheet, increasing the contact area with the original fabric and applying a large driving force to the original fabric. Rapid acceleration (required torque is reached within one rotation after the driven rotation).

). Similarly, the adhesive surface to be provided on the original fabric side can be provided at any position as appropriate (taking into account various circumstances such as the material of the sheet and the subsequent sheet processing process), eliminating the tedious preparation work required in the past. is not necessary, and there is no risk of problems such as poor adhesion after adhesion.

Moreover, since it is possible to apply an adhesive surface over the entire width of the sheet edge of a new original fabric without any problem, which has been considered virtually impossible in the past, it becomes possible to obtain a stronger adhesive area.

In addition, since the running sheet cutting mechanism is provided between the sheet support roller and the contact point between the new web and its pressing roller, which is a relatively short distance, the running sheet is made of a material that stretches easily and is difficult to cut. However, it can be cut without any problem.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of one embodiment of this invention, Fig. 2 is a plan explanatory diagram of the connecting machine frame, and Fig. 3 is a perspective view of an example of the fabric connecting surface. , 2 is the original fabric support device, 3 is the sheet pressing means, A is the rewinding position, B is the rewinding end position,
R1 and R2 represent the original fabric, and S represents the running sheet.

Claims (1)

[Scope of utility model registration request] It has a raw material shaft support at both ends of the rotating arm, rotates 180',
A web support device that puts a new web from the loading position to the unwinding position, and before the unwinding is finished, rotates another 180 degrees and returns it to the original loading position, and arms extending to both sides of the center of the rotating arm. When the sheet support rollers on both sides that are pivotally supported and the original fabric before the above-mentioned rewinding is completed return to the mounting position, and the new original fabric enters the rewinding position, it advances beyond the above-mentioned support rollers on the upper side and the new original fabric. The connecting machine frame is provided with a connecting machine frame that is close to the traveling sheet, and a drive mechanism that moves the connecting machine frame close to and away from the traveling sheet, and the connecting machine frame is synchronously driven by a sheet pulling mechanism of the sheet processing section.) , a pressing roller and its pressing mechanism capable of pressing a running sheet onto a new original fabric, which rotates the new original fabric through the running sheet, and presses and adheres the running sheet to the adhesive surface of the sheet end; A continuous sheet feeding device comprising a cutting mechanism that cuts the sheet between a sheet support roller and a pressing roller.