JPS6029440Y2 - web slitter - Google Patents

Description

[Detailed description of the invention] The present invention relates to a web slitter, and in particular, to a web slitter that has an improved structure of its upper blade, upper blade hole, and rudder.
It's about the ladder.

One sea gnat as used in this invention generally has a thickness of 1 μm to 1 μm.
000μ・m, width o, arn ~ 3m・vinyl chloride,
A plastic film such as polycarbonate, ABS resin, polyethylene terephthalate, cellulose triacetate, etc.; a visible strip made of paper, synthetic paper, etc., and a coating film, such as a photosensitive layer, on the surface using the strip as a support; Magnetic layer, adhesive layer, protective layer, slip layer, colored layer 4
, etc. are also included.

Conventionally, the above-mentioned web is cut in the longitudinal direction to a desired narrow width depending on the application (hereinafter referred to as slit cutting).

) The web slitter predicate mechanism 4 for the first;
As shown in Figures 1 to 12, the spindle 2, which is disposed above the web 1 and across the sea urchin, is spaced at a distance P corresponding to the desired slit width. The attached holder 3, a plurality of thin circular upper blades 56 whose center hole vicinity is clamped and fixed by the pressing means 4', and a support disposed below the front web 1 and across the web 1. Axis 6. To,
The upper blade 5 had an outer peripheral width corresponding to the distance P.
It is equipped with the same number of circular lower blades 7, and is admonished.

Figure 2 shows a typical structure around the upper blade of a conventional pickpocket.

- In this upper blade peripheral structure, the holder 3, which is continuously pivoted to the support shaft 2, includes a first support 10 that can be freely fitted into the center hole of the upper blade 5, and a Holder 3. The supporting surfaces ■1 of the first and second pavers to which the pressing means 4 for constantly pressing the front upper blade ``5'' fitted in the blade from the side and preventing its movement in the axial direction are attached to the outer peripheral surfaces of the first and second pavers ``1'' It is provided by a continuous stepped process.

Note that the pressing means 4 pushes the locking pins 12 planted at equal intervals on the second support surface 11 through the notches (not shown) provided corresponding to the locking pins 12. After the collar member 13 is inserted into the second support surface 11, the collar member 13 is fixed to the second support surface 11 by rotationally displacing the whole so that the notch is removed from the locking pin 12.
, a ring-shaped coil spring 14 that is inserted into a small gap between the upper blade 5 and the collar member 13 and can elastically restrict the movement of the upper blade 5 in the axial direction. There is.

Further, 15 is a central hole for attachment to the front support shaft 2.

The upper blade peripheral mechanism of the conventional slitter as described above has relatively good operability for attaching and detaching the holder 3 to the support shaft 2. However, the outermost peripheral surface of the collar member 13 and the first Since the accuracy of the distance P is directly influenced by the flatness of the first end surface 16 formed between the support surface 10 and the first end surface 16, the accuracy of the distance P is directly influenced by the flatness of the first end surface 16 formed between the support surface 10 and the The first end surface 16, for which it is impossible to increase the density of the entire end surface, not only makes it impossible to dramatically improve the slitting accuracy of the web 1, but also lacks stability in slitting accuracy. Ta.

Furthermore, as the number of slits increases, the total weight of the collar member 13 applied to the front support shaft 2 reaches a level that cannot be ignored. It was the cause.

SUMMARY OF THE INVENTION An object of the present invention is to provide a web slitter that eliminates the drawbacks of the conventional slitter described above and is equipped with an upper blade peripheral mechanism that is stiff and relatively compact.

The purpose of the present invention is to provide a web slitter that cuts a web to a desired width by sliding the blade surfaces of circular upper and lower blades that are rotatably supported. It is characterized by comprising an upper blade having notches, a holder having several screws corresponding to the notches on the other end surface, and relief grooves for the screws on one end surface. Distantly related to Web Slitter.

Hereinafter, one embodiment of the present invention will be described based on the attached drawings.

As shown in FIGS. 3 and 4, the upper blade peripheral mechanism in the slitter of the present invention is first compared with the thin circular upper blade 40 and the conventional upper blade 5.
The difference is that 2 is provided.

Next, the holder 30 of the present invention is provided with a stepped support surface 31 into which the center hole 41 of the upper blade 4° can be fitted, and a ring-shaped coil spring from the outermost peripheral surface 32 to the support surface 31 side. A tapered surface 34 is provided on a part of the body so that the holder 33 can be inserted.

Further, the holder 30 has a ring-shaped relief groove 36 formed in one end surface 35 located on the side opposite to the tapered surface 34 so that a protruding portion of a screw 38 described later can be freely inserted and removed.

On the other hand, the screw 38 is screwed onto the other end surface 37 of the holder 30 located on the tapered surface 34 side.
8 is provided with a stepped portion 39 so that a slight gap C is maintained after tightening.

The screw 38 is positioned in correspondence with a notch 42 of the upper blade 40, and the notch 42 is cut to a size large enough for the screw 38 to pass through.

The upper blade of the slitter of the present invention and its peripheral mechanism constructed as described above are constructed by first screwing the screw 38 into a predetermined position, and attaching the coil spring of the holder 30 with the ring-shaped coil spring 33 mounted on the tapered surface 34. The upper blade 40 is loaded onto the support surface 3 of the holder 30 on which the blade 33 is placed.

The front holder 30 to which the screw 38 is attached moves slightly (gap C) in the direction of the gap C with the head of the screw 38 due to the pressing force of the ring-shaped coil spring 33)
If the front notch 42 is slightly rotationally displaced relative to the screw 38, its movement in the axial direction is prevented and it will not come off from the holder 30.

As described above, when the loading of the upper blades 40 into the respective holders 30 is completed, each holder 30 is sequentially attached to the spindle 2 and pressed together, so that each upper blade 40 is attached to the -front end surface. 35 and the coil spring 33, the gap P is maintained, and the installation of each holder 30 is completed.

The upper blade 40, which is pivotally attached to the support shaft 2, is always fixed along the front end surface 35 by the biasing force of the ring-shaped coil spring 33.
Since the situation where the entire area cannot be precisely finished due to the protrusion of the first support surface 10 like the first end surface 16 of the conventional holder 3 is eliminated, it is sufficient to obtain an extremely accurate gap P. Precisely finished with flatness.

Moreover, since the upper blade 40 is attached to the holder 30 by the screw 38, the support shaft 2
The load on the space P is reduced, and the accuracy of the distance P can be further expected to be maintained and improved.

Incidentally, it is also possible to use a diagonal spring or a plate-shaped spring for the ring-shaped coil spring 33, and the relief groove 36 is not provided all around the ten-man end face 35, but only at a position corresponding to the screw 38. It may be installed only in.

As described above, the slitter of the present invention has a more compact structure than conventional slitters, and the upper blade 40 can be fixed more accurately, making it possible to provide web slits with high slitting accuracy. Ta.

[Brief explanation of the drawing]

Figures 1 and 2 are explanatory views of the main parts of a conventional web slitter, Figure 3 is an enlarged sectional view of the upper blade of the slitter of the present invention and its peripheral mechanism, and Figure 4 is a plan view of the upper blade of the slitter of the present invention. It is. 30 is a holder, 31 is a support surface, 35 is one end surface, 36
is a screw, and 40 is an upper blade.

Claims (1)

[Scope of utility model registration request] A web slitter that cuts the web to a desired width by slidingly contacting each blade surface of a rotatably supported circular blade and a lower blade. Notches at equal intervals around the circumference 4) zo
A ring-shaped coil spring is attached from the outermost circumferential surface 32 to the support surface 31 side. 3; Tapered surface "3" into which 3I can be inserted; holder 30 with a circle and an end surface on the opposite tapered surface side, 3'5, with relief groove 36 recessed, and the tapered surface of the holder 3'07 It is characterized by comprising a screw 3) 8 which is screwed onto the side end face 3 and 7 and whose head can be inserted into the escape groove 36 and is positioned corresponding to the notch 4 and 2. A web slitter.