JPS59100759A - Strip like sheet connecting apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a connecting device that is mainly used for belt-shaped sheets, particularly films and sheets such as resin paper that are poor in rigidity.

In equipment that continuously supplies strip-shaped sheets, − pieces of raw material (
When the sheet of the sheet roll runs out, the leading edge of a new raw material must be connected to the rear of the sheet. The process involved trimming the edges of both sheets and connecting them with adhesive tape.
Everything was done by hand. This is because cutting and connecting is not a hassle like with metal plates; all you have to do is cut it with a razor blade and stick tape on it.

However, as sheets become wider these days, cutting them accurately and connecting them without distortion requires the cooperation and skill of two or three people, which is a problem with automated sheet feeding equipment. I was here.

Compared to metal plates, paper, resin films, etc. are often difficult to handle because they lack the rigidity and will break if you pull them a little too hard. However, this invention overcame this weakness and took advantage of the ease of cutting and connecting described above to successfully develop the simplest device for connecting sheets on a supply path.

First, to give an overview of the invention, it consists of two upper and lower holding beams that sandwich and fix the belt-shaped sheets to be connected one on top of the other and the entire length of both sides of the planned connection line, and the sheets that are fixed on both sides with these beams. After removing the sheet clamping pressure of the cutting blade that overlaps and cuts the planned connection line position and each of the above beams, and removing the unnecessary ends of each of the cut upper and lower sheets, insert the cutting blade between the two above-mentioned upper and lower beams. This is a belt-like sheet connecting device characterized by comprising an adhesive mechanism for connecting both cut ends with an adhesive tape.

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.

lil in Figure 1: unwinding shaft, C is a guide roller, S is a sheet, C is a winding core, 3. ≠, ta, and ot are the clamping beams, /6 is the adhesive tape pressing base, and /9 is the clamping surface. FIG. 1 shows the state in which the sheet S is being fed.

Figure 2 shows the direct spinning with no sheet S of core C (ii1
The holding beam t, 4 is raised from the standby position, the sheet S on the traveling path is placed on the holding surface, and the rear end of the sheet S is pulled off from the winding core C.

FIG. 5 shows that the winding core C of the unwinding shaft l is replaced with a new roll SO, and the sheet S' is temporarily moved around the winding shaft/11. Wind it around the guide roller a.
Pull it out to the top of the new sheet S' so that the upper surface of the new sheet S' is on the upper holding beam 3. ≠ Indicates a state where it hangs on the bottom surface.

Figure 4 shows upper beam 3. Lower ≠ and both old and new sheets s', 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 the state in which the cutting blade /7 is run along the lower beam pattern to overlap and cut the sheets s' and s fixed on both sides.

Figure 6 is an enlarged view of the vicinity of the cut section, showing the upper beams 3 and 4.
Adhesive tape T is attached in advance to the surface of the adhesive tape pressing base /l between t and the lower side of the tape.

Figure 7 shows the upper and lower sheets (S'), which were cut after removing the sheet clamping pressure from each beam.The unnecessary ends of each of the beams (3.
The state is shown in which the cut ends are inserted between ≠, j, and B, respectively, and the two cut ends are connected with adhesive tapes T and T. Now the new and old sheets S'
, S is now connected. Although FIGS. 6 and 7 show an embodiment in which suction holes are provided in each beam, they may be provided only in beams 3 and 6, or may not be provided at all.

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 feeds a sheet S to the left in the figure by mounting an original fabric on a rewinding shaft. Initially, the original fabric had a size of So shown by the chain line, but the S) is exhausted and is almost concentrated only on the winding core C. The sheet S passes through the guide roller λ and advances to the left. In order to connect the sheet between the unwinding shaft and the guide roller, the connecting device of the present invention connects the two clamping beams 3, 41- and 6, provided above and below the sheet running path between them, to the frame F, It is supported by the machine frame F.

In this case, the upper clamping beam 3. ≠ is fixed in parallel by the rotating bracket () f attached to the rotating shaft 7, and the lower clamping beam! , 6 are fixed in parallel by a rotation bracket 10 attached to the rotation axis.

With clamping beam 3! , ≠ and 6 are in the operating position shown by the solid line, 7-) They face each other so that they can hold S. bracket)
When f, 10 turns to the standby position shown by the chain line, each beam is sufficiently separated from the sheet S traveling path.

In this embodiment, the lower bracket rotation shaft 7 is the machine frame F,
However, the upper rotating shaft 7 is attached to the lower end of the swinging arm //, and the swinging arm //2 is also attached to the rail of the frame F along with the lifting platform/3. It is designed to go up and down. This is coaxial with the rotating shaft 7 and has a pre-winding shaft/11. This is because it is attached.

This temporary winding shaft /≠ is swung up to the position of the slag' shown by the chain line, and then to /4"', and the entire width of the sheet end of the new fabric S is slightly wound up, and the lil- position shown by the solid line is swung up. By returning it to the position, the new sheet is bent and pulled out without internal distortion.After being pulled out in this way, when the bracket is rotated from the standby position shown by the chain line to the operating position shown by the solid line, the beam 3.4A moves into the new sheet as shown in the figure. s' is stacked on top of the old sheet S, and the lower beam is pressed against the clamping surface of S. The small amount of winding of the tip of the new material So by the temporary winding shaft l≠ is for This is an excellent means to mechanize the difficult task of drawing out the sheet evenly.In addition to using double-sided adhesive tape or adhesive, the leading edge of the sheet may be captured using electrostatic adsorption or vacuum adsorption.

Clamping beam 3 of this embodiment. ≠and! , 6 have sub-beams 3α, ri and lta, 4α protruding inward, respectively, so that they can be extended or retracted as necessary. The sub-beam becomes the backing stand when the adhesive tape is tied.#
1, or in this example, it also has the effect of holding both sides close to the planned connection line position A. Beams 3.4t, j, and t all have suction holes scattered on their clamping surfaces to serve as suction parts, and are equipped with a vacuum pump and air piping (not shown) so that suction can be applied or removed as needed. , comes with a switching valve.

Also beam 3. Brackets /j with vertical rails are erected on both ends of the rear surfaces of ≠, j, and B to face each other, and are held movably up and down with an adhesive tape pressing member 16 between them as an adhesive tape adhesion mechanism.

In addition, in this embodiment, the cutting blade/
A dovetail groove /I is provided which serves as the running rail for No. 7.

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

The sheet supply is stopped just before the original web fitted on the rewinding shaft/ is exhausted, and the lower rotating bracket IO is pushed up from the standby position to the operating position by the fluid pressure cylinder/P, and the stopped sheet S on the traveling path is moved to the beam j, Adsorb it to the suction part of B. 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 is replaced with a new original fabric SO.

The lifting platform /3 and the swinging arm // above the running path are raised, lowered and swung by respective drive mechanisms (not shown), and the false winding claw shaft l11.
from the standby position to the position /lf in contact with the new fabric So, and wrap the edge of the sheet slightly with the double-sided adhesive tape attached in advance. By slightly winding, we mean winding the sheet S' by an amount that allows it to be held securely over its entire width without distortion.

Then, the upper rotating shaft 7, which is coaxial with the temporary winding pawl shaft l≠, is placed at the solid line position in the figure, and the rotating bracket Fl, which was standing above in the standby position (dashed line), is rotated clockwise as shown in the figure by a hydraulic motor (not shown). When lowered to the 3. The lower clamping beam 1. pushes down the sheet S' pulled out by the gripper, and waits by adsorbing the sheet S on the running path first. Press to +. Now the old sheet S
The trailing end and the vicinity of the leading edge of the new sheet S' are held together on the running path, and the sub-beams protruding from each beam are pushed together on both sides of the planned connection line position A to prepare for sheet cutting.

In this example, the sheet is cut by running the cutting blade /7, which has been waiting outside the sheet width, along the dovetail groove /♂ of the sub beam jα. The new and old sheets (old and new) S', S
In order to remove the unnecessary sheet edge, in this case, remove the force of the drive mechanism of the rotating bracket, for example, the hydraulic motor, and wind the new sheet s' end onto the temporary winding claw shaft/hiro, υ, and roll the old sheet S. The tail is pulled out manually. Even if there is no clamping force, the non-extracted sides of S, S' are held in position by the adsorption force of each beam. Then, upper secondary beam 3α, <
zα is retracted by a fluid pressure cylinder (not shown) and the beam 3. '/-, apply clamping force again using the rotating bracket r.

Therefore, the upper left and right beams 3. ≠Both plackets standing on top)
The upper adhesive tape pressing base /6 is lowered along the vertical rails /jr and /j, and the adhesive tape previously attached to the pressing surface is pressed against the position where the old and new sheets butt against each other, that is, the connection line. Then, the lower sub-beam jα, 6a is 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 can be retracted at the same time and the tape can be applied from the top and bottom at once. The method of attaching the adhesive tape to the pressing base/6 in advance may be suction, adhesive, or mechanical support. Run the adhesive tape reel and stretch the tape onto the pressing table/6 to temporarily fix it.

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

Although this invention has been explained above with reference to one embodiment, it can be modified in various ways according to design conditions using the well-known techniques of mechanical engineers.
It is natural that applications will be made.

For example, if the sheets to be connected are not soft like resin films but are suitably rigid sheets, beam 3 of the embodiment shown in FIG. a, s, 1. In many cases, there is no problem in cutting and connecting old and new sheets even if each beam does not have a suction mechanism.

The adhesion mechanism for the adhesive tape may be one in which the tape is stretched in advance and held in a standby position as in the above embodiment, and then pressed against the air, or an attachment method in which the rolled tape is unwound and run between 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. 9, this invention device is connected to two guide rollers λ.

- The lower beam t, 4 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.

In this invention, the flexible sheet is cut at the planned connection line position, with its entire length on both sides held between the clamping beams and fixed, so that no matter how thin or flexible the sheet is, it can be cut accurately.

After fixing the new and old sheets with a clamping beam and cutting them together, the clamping force is loosened and the unnecessary sheet edges are pulled out.The remaining new and old sheet edges will remain in the same butted state when they are overlapped and cut, and then the adhesive tape can be applied. Since it is crimped, there is no possibility of sheet distortion or local sagging due to poor connection.

[Brief explanation of the drawing]

1 to 5 are principle explanatory diagrams of the band-like sheet connecting process according to the present invention, FIGS. 6 and 7 are enlarged explanatory diagrams before and after adhesive tape adhesion, and FIG. 8 is a detailed elevational view for explaining the present invention. FIG. 9 is an explanatory diagram of main parts of another embodiment. 3.4t, evening, 6...Holding beam, 16...Connection mechanism using adhesive tape (Chive pressing base), /7...Cutting blade, lP...Adsorption part.

Claims (1)

[Scope of Claims] Two upper and lower clamping beams that stack strip-shaped sheets to be connected one above the other and sandwich and fix the entire length on both sides of the planned connection line position, and the planned connection line position of the sheets fixed on both sides by these beams. After removing the sheet clamping pressure between the cutting blade for overlapping cutting and each of the beams mentioned above, and removing the unnecessary ends of the cut upper and lower sheets, insert the blade between the two above-mentioned upper and lower beams and cut both cut ends. A belt-shaped sheet connecting device characterized by comprising an adhesive mechanism for connecting with adhesive tape.