JPS6242817B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a butt connection device for belt-shaped sheets, particularly films and sheets such as resin paper with poor rigidity.

This butt connection is a method in which the cut ends of the old and new sheets are butted together, and a common adhesive tape is applied to the sheet surface along the butted area to connect the new and old sheets in a butt state. The normal connection method in which sheets are connected in an overlapping state results in a thick overlapping portion of the sheets, which is often used when the sheet becomes difficult to travel when passing through other processing equipment.
Conventionally, this type of butt connection uses a support stand for sheet connection, where the worker supports and holds the sheet to be cut from the back side to prevent it from sagging, and then the worker cuts the sheet. The ends were connected by applying adhesive tape to the ends.

However, when a worker butt-connects sheets as described above, especially when butt-joining sheets with poor rigidity or wide sheets, the sheet must be held on a support stand to prevent it from becoming distorted, and the connection must be made accurately. In order to accurately connect the cut ends by butting them together, the cooperation and skill of multiple workers are required, and a lot of work time is required. Furthermore, since the cutting and connecting work is performed manually, the joints are likely to be inaccurate, which may interfere with subsequent work such as sheet processing steps.

Therefore, the present invention provides a cutting blade for cutting the vertically stacked belt-like sheets to be connected in an overlapping manner at the planned connection line position, and a cutting blade that is provided over the entire width of the belt-like sheet on both sides of the connection line planned position, and the cutting blade is actuated. Sometimes, two upper and lower clamps are used to clamp and fix both sides of a belt-shaped sheet stacked one above the other, and after cutting the belt-shaped sheet, the clamping pressure can be released so that the unnecessary ends of the cut upper and lower sheets can be extracted. a beam, a holding means provided on the clamping beam and capable of holding the cut ends of the upper and lower sheets cut by the cutting blade to be connected in abutting state, and a holding means inserted between the two upper and lower beams. , and an adhesive mechanism for connecting both cut ends with an adhesive tape.

Therefore, according to the present invention, the old and new strip sheets are stacked vertically and held by the two upper and lower holding beams,
The upper and lower sheets in this state are cut with a cutting blade. In this case, the necessary cut ends of the upper and lower sheets are held in a butt state by holding means provided on the holding beam. After that, the clamping pressure by the clamping beam is released and each unnecessary end is pulled out, and an adhesive mechanism for connecting the necessary cut ends to be connected with adhesive tape is inserted between each of the two upper and lower beams, Connect the cut ends.

Next, embodiments of the present invention will be described with reference to the drawings. 1 to 7 are principle explanatory diagrams of one embodiment, and the apparatus of the embodiment is shown in FIGS. 8 and 9.

In Fig. 1, 1 is the unwinding shaft, 2 is the guide roller, S is the sheet, C is the winding core, 3, 4, 5, 6 are the clamping beams,
16 is an adhesive tape pressing base, and 19 is a clamping surface. FIG. 1 shows the state in which the sheet S is being fed. Second
The figure shows a state in which the lower clamping beams 5 and 6 are raised from the standby position just before the sheet S on the winding core C runs out, the sheet S on the running path is placed on the clamping surface, and the trailing end of the sheet S is removed from the winding core C. shows.

Figure 3 shows that the winding core C of the unwinding shaft 1 is replaced with a new roll _S0 .
The sheet S' is slightly wound around the temporary winding shaft 14 and pulled out above the guide roller 2, and the upper surface of the new sheet S' is shown hanging on the lower surface of the upper holding beams 3 and 4. Fourth
The figure shows upper beams 3 and 4 lowered and both old and new seats S' and S
are placed one above the other, and the entire length on both sides of the planned connection line position is sandwiched and fixed.

FIG. 5 shows how the cutting blade 17 is run along the lower beam 5 to overlap and cut the sheets S' and S, which are fixed on both sides.

FIG. 6 is an enlarged view of the vicinity of the cutting part, and shows the surface of the adhesive tape pressing base 16 between the upper beams 3 and 4 and the surface of the lower beams 5 and 6.
is installed.

Figure 7 shows the beams 3, 4 and 5, 6 on both sides, with the sheet clamping pressure removed from each beam, the unnecessary ends of the cut upper and lower sheets S' and S removed, and only the cut ends of the old and new sheets butted together. The state is shown in which both cut ends are connected with adhesive tapes T, T, which are inserted between the two. This completes the connection between the old and new sheets S' and S. Figures 6 and 7 show an embodiment in which each beam is provided with a suction hole as a holding means.

A device according to an embodiment of the present invention that performs each of the above steps will be explained in detail with reference to FIG. This embodiment is attached to a device that attaches an original fabric to a rewinding shaft 1 and feeds a sheet S to the left in the figure. Initially, the original fabric had a size of S ₀ as shown by the chain line, but the sheet S is exhausted and there is almost only the winding core C. The sheet S passes through the guide roller 2 and advances to the left.
In order to connect the sheet between the unwinding shaft 1 and the guide roller 2, the connecting device of the present invention connects two clamping beams 3, 4 and 5, 6 provided above and below the sheet running path between them, respectively, to a frame _F1. and supported by machine frame _F2 .

In this case, the upper clamping beams 3 and 4 are fixed in parallel by a pivot bracket 8 attached to a pivot shaft 7,
The lower clamping beams 5, 6 are fixed in parallel by a pivot bracket 10 attached to a pivot shaft 9. When the clamping beams 3 and 5, 4 and 6 are in the operating position shown by solid lines, they face each other so that they can clamp the sheet S. When the brackets 8, 10 are turned to the standby position indicated by the chain lines, each beam is sufficiently separated from the sheet S travel path.

In this embodiment, the lower bracket rotating shaft 9 is fixed to the machine frame _F2 , but the upper rotating shaft 7 is attached to the lower end of the swinging arm 11, and the swinging shaft 12 at the upper end of the swinging arm 11 is attached to the lower end of the swinging arm 11. It is also designed to move up and down along the rails of the frame _F1 together with the lifting platform 13. This is because the temporary winding shaft 14 is attached coaxially with the rotating shaft 7.

This temporary winding shaft 14 is raised to the position 14' indicated by the chain line, and then swung to 14'' _.
A new sheet is bent by winding up the entire width of the sheet end a little and returning it to position 14 indicated by the solid line, and then pulled out without internal distortion. When the bracket 8 is pulled out in this way and rotated from the standby position shown by the chain line to the operating position shown by the solid line, the beams 3 and 4 stack the new sheet S' on top of the old sheet S as shown in the figure, and the lower beam It will be pressed against the clamping surfaces 5 and 6. Winding up a small amount of the tip of the new fabric _S0 using the temporary winding shaft 14 is an excellent means of mechanizing the difficult work of uniformly drawing out wide sheets. To start winding, the leading edge of the sheet may be caught by double-sided adhesive tape or adhesive, or by electrostatic adsorption or vacuum adsorption.

The clamping beams 3, 4 and 5, 6 of this embodiment are
Sub-beams 3a, 4a and 5a, 6a project inward, respectively, and can be extended or retracted as required. The sub-beam not only serves as a back support when applying the adhesive tape, but also has the function of holding both sides close to the planned connection line position A in this example. Each of the beams 3, 4, 5, and 6 has suction holes scattered on the clamping surface to form a suction section 19, and is equipped with a vacuum pump, air piping, and a switch (not shown) so that suction can be used or not used as needed. Comes with a valve.

In addition, the beams 3, 4, 5, and 6 have brackets 15 with vertical rails erected on opposite ends of their back surfaces.
In between, an adhesive tape pressing stand 16 is held movably up and down as an adhesive tape adhesion mechanism.

In addition, in this embodiment, only the sub beam 5a,
A dovetail groove 18 that serves as a running rail for the cutting blade 17 is provided.

Next, the handling and operation of this embodiment device will be explained.

The sheet supply is stopped just before the original web loaded on the rewinding shaft 1 runs out, and the lower rotating bracket 10 is pushed up from the standby position to the operating position by the fluid pressure cylinder 19, and the stopped sheet S on the traveling path is moved to the beams 5, 6. Adsorb it to the suction part. The trailing end of the adsorbed sheet S is removed from the winding core C and allowed to hang down, and the winding core C of the unwinding shaft 1 is replaced with a new original fabric _S0 .

The elevating table 13 and the swinging arm 11 above the traveling path are raised, lowered and swung by respective drive mechanisms (not shown), and the temporary winding shaft 14 is brought into contact with the new web _S0 from the standby position.
4" position and wrap the edge of the sheet slightly using the double-sided adhesive tape attached in advance.
Wrap S′ by the amount that can be held securely over the entire width without distortion.

Then, the upper rotating shaft 7 coaxial with the temporary winding shaft 14 is placed at the solid line position in the figure, and the rotating bracket 8, which was standing above in the standby position (dashed line), is lowered clockwise in the figure by a hydraulic motor (not shown) or the like. Then, the holding beams 3 and 4 push down the pulled-out sheet S' and press it against the lower holding beams 5 and 6, which are waiting to pick up the sheet S on the running path first. Now, the rear of the old sheet S and near the tip of the new sheet S' are overlapped and held on the running path, and the sub-beams protruding from each beam are pushed together on both sides of the planned connection line A, and the sheet is pressed together. Prepare for amputation.

In this example, the sheet is cut by running the cutting blade 17, which has been waiting outside the width of the sheet, along the dovetail groove 18 of the sub beam 5a. In order to remove unnecessary sheet ends of the old and new sheets S', S which have been overlapped and cut, in this case, the force of the drive mechanism of the rotating bracket 8, for example, a hydraulic motor, is removed, and the new sheet S' end is temporarily rolled. It is wound onto the take-up shaft 14, and the trailing end of the old sheet S is pulled out manually. Even if there is no clamping force, the sides of the sheets S and S' that are not pulled out are held in that position by the adsorption force of each beam. Then, upper secondary beams 3a, 4a
is retracted by a hydraulic cylinder (not shown) and attached to the beams 3 and 4, and clamping pressure is applied again by the rotating bracket 8.

Therefore, the upper adhesive tape pressing base 16 is lowered along the vertical rails of both brackets 15, 15 that stand on the upper left and right beams 3, 4, and the adhesive tape previously attached to the pressing surface is placed at the position where the old and new sheets butt. In other words, press it against the connection line. Then, the lower sub-beams 5a, 6a are retracted, and the lower adhesive tape is applied in the same manner to complete the adhesion.

If the sheets S and S' have appropriate rigidity, the upper and lower sub-beams may be retracted at the same time and the tape may be applied from the upper and lower sides at once. Press the adhesive tape in advance on the stand 16
The method of attachment may be suction, adhesive, or mechanical support, and the material of the strip sheet should be considered to decide whether to apply the adhesive tape to both the upper and lower sides, or only to one side. The designer, etc. may decide on the above. A reel of adhesive tape is run to stretch and temporarily fix the tape onto the pressing table 16.

After the connection is completed, it goes without saying that everything should be returned to its standby position.

Although one embodiment has been described above, it is natural that this invention can be varied and applied in various ways depending on the design conditions using techniques well known to mechanical engineers.

For example, if the sheets to be connected are not soft like resin films but are suitably rigid, the beams 3, 4, and 5 of the embodiment shown in FIG. , even just 6,
Furthermore, even if each beam does not have a suction mechanism, there is often no problem in cutting and connecting old and new sheets. Adhesion mechanisms for adhesive tapes include stretching the tape in advance, waiting for it, and then pressing it all at once, as in the above example.
An attachment method may also be used in which the tape is unwound and runs between the beams.

Further, in the above embodiment, both the upper and lower beams come out from the standby position to the sheet travel path, but as shown in FIG. 6 may be fixed at a position that supports the lower surface of the steady running path. The two upper and lower beams may be combined into one upper and lower beam, with a gap provided in the center of each beam for a cutting blade or adhesive tape. The cutting device can be of any type.

According to the present invention, since the sheets are cut in a state in which the strip sheets to be connected by the clamping beam are overlapped, the cut ends of the sheets coincide with each other, and the required cut ends are brought into abutting state by the holding means provided on the clamping beam. Since it is maintained while maintaining the accuracy, there is almost no accuracy error in the connection part. Moreover, since the adhesive mechanism inserts between the beams and connects the necessary cut ends in the above-mentioned holding state with adhesive tape, no skill is required, and the cutting and connecting process only needs to be done once, reducing work time. Can be done.

[Brief explanation of the drawing]

1 to 5 are principle explanatory diagrams of the band-shaped sheet connecting process according to the present invention, FIGS. 6 and 7 are enlarged explanatory diagrams before and after adhesion of the adhesive tape, and FIG. 8 is an elevational view for explaining one embodiment of the present invention. FIG. 9 is an explanatory diagram of main parts of another embodiment. 3, 4, 5, 6... Holding beam, 16... Connection mechanism using adhesive tape (tape pressing base), 17... Cutting blade, 19... Adsorption section.

Claims (1)

[Claims] 1. A cutting blade that overlaps and cuts the vertically stacked strip sheets to be connected at the planned connecting line position, and a cutting blade that is provided over the entire width of the strip sheets on both sides of the planned connecting line position, and when the cutting blade is activated, Two upper and lower clamping beams each capable of clamping and fixing both sides of a belt-shaped sheet and releasing clamping pressure so that unnecessary ends of the cut upper and lower sheets can be extracted after cutting the belt-shaped sheet, and the clamping beams. A holding means is provided on the beam and is capable of holding the cut ends of the upper and lower sheets cut by the cutting blade to be connected in a butt state; 1. A butt connection device for band-like sheets, characterized by comprising an adhesive mechanism for connecting both cut ends with adhesive tape.