JPS60154042A - Notch forming device to beltlike paper - 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 relates to a notch forming apparatus for paper strips.

For example, when manufacturing paper bags such as envelopes, the paper strips shown in FIG.
Cutouts (A+) and (Ax) are formed at a predetermined interval (L), and then a strip of paper (1
) is cut to take out the original paper sheet (IA) shown in FIG.

While folding along (CL) and (Cd),
The shape shown in FIG. 10 is formed by pasting the shaded areas (I]) and (D2) with the adhesive r applied.

As an apparatus for forming notches (AI) and (A2) in the paper strip (1), the apparatus shown in FIG. 6 is known.

In the same figure, [10i is a drum rotatably provided in the direction of arrow (XI), and its outer circumference is a rotary blade whose outer circumference is equal to the outer circumference of the above-mentioned notches (A1) and (Ax) formed in the paper strip (1). Part 01) is provided protrudingly. Q2+ indicates an impression cylinder, which is disposed opposite to the drum 00) and rotatable in the direction of the force indicated by the arrow (Xd).
21 rotates, the rotary blade body part (of the drum 00) rotates.
The cutting edge of 111 is in contact with the outer peripheral surface of the impression cylinder (I2). Therefore, the paper strip (1) is fed out by a feeding means (not shown) and is pulled in the direction of the arrow 1), causing rotation. A notch (AI
), (A2) are formed at predetermined positions on the paper strip (1) with a predetermined interval (f).

However, due to the force, in the above-mentioned conventional apparatus, the bearing part (00) which rotatably supports the drum 00) and the impression cylinder 02 (
Due to manufacturing and assembly errors (not shown) and vibrations generated during rotation, the distance between the axes of the drum 0ω and the impression cylinder 02) may vary, and the cutting edge of the rotary blade rest part 01) may be placed on the outer peripheral surface of the impression cylinder α. There is a difference in the strength with which the material is pressed against the material, and there is a problem in that it is not always possible to form a notch properly.

On the other hand, there is a notch device shown in FIG. This device is indicated by the arrow (
A drum rotatable in the Xl) direction is provided, and this drum [
1 [Notch (A+) formed in the strip paper (1) on the outer periphery of 1
, (Aλ) is provided with a protruding rotary blade body portion αD that is equal to the outer contour of (Aλ). Then, a plate-shaped body tta made of ceramic and having a flat surface OJ is arranged opposite to the drum aω, and the drum α
0) rotates, the cutting edge of the rotary blade body U comes into sliding contact with the flat surface [3+] of the ceramic disk-like body a, and is placed at a predetermined position on the paper strip (1) moving in the direction of the arrow α. interval (f
), and a notch (AI) (A2) in a shape that matches the outline of the rotary blade body (Ill) is formed.

In the device configured in this way, a ceramic disc-shaped body (1
41 is fixed, the strength with which the cutting edge of the rotary blade body part [1) is pressed against the flat surface 03) of the disc-shaped body circle is reduced compared to the conventional device shown in FIG. 6 above. Since the difference, that is, the variation in the distance between the axes of the flat surface 03) and the drum 10) is small, the notch (A+) is always relatively properly formed.

(A2), but since the hardness of the ceramic disc (141) is high, this hard disc
The rotary blade portion CIl+ of the drum 001, which is in sliding contact with the drum 001, is easily worn out, and the expensive drum tlo) has the problem of being replaced more frequently.

This invention was made in order to solve the above-mentioned conventional problems, and it is possible to form notches properly in the paper strip at all times, and also to suppress the wear of the rotary blade resting part of the drum, thereby reducing the economic burden. It is an object of the present invention to provide a notch forming device for paper strips that can be formed.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic side view of the notch forming device according to the present invention, in which (1) is a strip of paper;
is continuously conveyed in the feeding direction α1 by the feeding means +21 (!: pulling means (3)). That is, the feeding means (2) is configured to feed a strip of paper (
1) rotatably supported, and the tension means (3)
In this embodiment, there are a pair of opposing conveyor ports (3).
It is composed of A, ) and (3B). Therefore, the conveying rollers (3A), (3
B) is driven by the arrow (Z+) by the drive mechanism shown in the figure.
To! , d The paper strip (1) is continuously conveyed in the direction of arrow α1) while being forced to rotate.

(4) indicates a notch forming means 8 This notch forming means is for forming a notch (described later) in a predetermined shape at a predetermined position in the paper strip (1), and is connected to the above-mentioned feeding means (2) and The strip of paper (1) is provided at an intermediate portion between the means (3) and the means (3).
A drum (4A) whose one surface (upper surface) rotates and is driven in the direction of the arrow (z3), and a fixed blade member (4B, ) disposed opposite to this drum (4A). -, and the outer periphery of the drum (4A) includes the outline of the notch described later, etc. 1. A rotary blade rest part (5) is provided protrudingly.

The rotary blade part (5) protruding from the drum (4A) has a second
As shown in the figure, the notches (A1) and (A
λ), which is approximately the shape of a baseball home base, and this rotary blade body (5) is the same as the drum (4A).
A protrusion of 0.5 to 1 mm is provided at both ends of the plate.

The fixed blade member (4B) is attached to the holder (6) as shown in Figure 3.
The arm part of the holder (6) is composed of a plurality of plate-shaped blades (7+), (7λ)...(7n) (razor blades as an example) fixed in parallel without any gaps in the recess (6A) of the holder (6). (6B) (see Figure 1) to the frame (8), the plate-shaped blade (7
+), (7shi)...(7n) is the rotary blade rest part (5)
It is set so as to diagonally intersect and correspond to the drum (4A), and to come into sliding contact with the rotary blade rest part (5) when the drum (4A) rotates. In the figure, (9) indicates a reversing roller.

In the above configuration, the arrow (Y+) is fed out from the feeding means (2) in FIG.
The paper strip (1) is continuously conveyed in the direction at a predetermined conveyance speed, and the drum (4A) is conveyed at a circumferential speed equal to this conveyance speed.
As shown in FIG. 8, the paper strip il+ had a predetermined interval at opposing positions on both sides, that is, an interval α determined by the diameter of the drum (4A). Cutouts (A+) and (A2) are formed.

In this case, since the fixed blade member (4B) corresponds to the rotating drum (4A), errors in manufacturing and assembly of the notch forming means (4), as well as vibrations generated during rotation of the rotary blade, may occur. The variation in the suppression strength between the cutting edge (5a) of the resting part (5) and the cutting edge of the plate-shaped blade bodies (7+)-, -(7n) is smaller than that shown in FIG. 6 described in the conventional example.

Moreover, the plate-shaped blade body (71) ~ (
Even if 7n) is pressed against the rotary blade body part (5), a plate-shaped blade is formed, so when the elongation g is at its lowest, the cutting edge of the plate-shaped blade bodies (71) to (7n) and the rotation The fixed blade member (4B) can be set by applying a pressing force so that the blade edge (5a) of the blade rest part (5) comes into proper contact with the blade edge (5a) of the blade rest (5), so that the notch is always properly cut against the paper strip (1). XLz)'& shadow can be formed.

In addition, the rotary blade body part (5) and the plate-shaped blade body (71) to (7n)
Since the difference in hardness between the rotary blade body portion (5) and the rotary blade body portion (5) is small, the degree of wear of the rotary blade body portion (5) is suppressed.

On the other hand, the point of contact with the cutting edge (5a) of the rotary blade part (5) in each of the plate-shaped blade bodies (71) to (7n) is a point contact, and although this contact point wears out over time, the arm part ( After loosening the bolt of arm part (6B),
B) Move the holder (6) slightly in the longitudinal direction,
By changing the point of contact with the cutting edge (5a) of the rotary blade body portion (5) in each of the plate-shaped blade bodies (71) to (7n), the frequency of replacing the fixed blade member (4B) can be significantly reduced.

In addition, in the above embodiment, the holder (6) of the fixed blade member (4B)
Although the explanation is given using an example in which the plate-shaped blade bodies (71) to (7n) fixed to the rotary blade body part (7n) are made to correspond to the entire length of the rotary blade body part (5) as shown in FIG. As shown in , plate-shaped blade bodies (71) to (7n) are provided corresponding to the chevron parts (5A+) and (5Az) of the rotary blade resting part (5), and both straight parts ( 5B+), (5Be) to I″i
Proper notch (A+) by using 1i single blade,
(A) can be formed. That is, the parts that are most difficult to cut, the chevron portions (5A+) and (5Ae) that diagonally intersect with the feeding direction α1) of the strip paper (1).
Both linear parts (5B+
), the intersection with (5B2), and the feed direction (Y+)
A chevron portion (5A+) whose inclination directions are different from each other,
(The intersection points of comrades of 5A are cut by the plate-shaped blades (71) to (7n), and the cutting is relatively easy.
B+) and (5B2) are cut with a single blade.

Therefore, the number of plate-shaped blade bodies (7J) to (7n) used is reduced, and the cost of the device can be reduced. Note that the tensioning means (3) may be constituted by a winding mechanism (not shown).

As explained and clarified above, according to the present invention, notches can be formed properly in the paper strip at all times, and wear of the rotary blade of the drum and local wear of the plate-shaped blade are suppressed. Cost reduction can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of a notch device according to the present invention, Fig. 2 is a perspective view of a drum on which a rotary blade rest is formed, Fig. 3 is a sectional view of a fixed blade member, and Fig. 4 is a plate-shaped blade member and FIG. 5 is an explanatory diagram showing another embodiment of the fixed blade member; FIG. 6 is a schematic side view showing an example of a conventional device;
Figure 7 is a schematic side view showing an example of the same area, Figure 8 is a plan view of a strip of paper with a notch formed, Figure 9 is a plan view showing the original paper sheet of an envelope, and Figure 10 is a plan view showing the paper sheet formed into an envelope. FIG. (1)...Striped paper, (2)...Feeding means,
(3)...Tensioning means, (4)...Notch forming means, (4A)...Drum, (4B)...Fixed blade member,
(5)...Rotary blade body part, (7)-(7n)...Plate-shaped blade body. Patent applicant Hiroharu Ouchi

Claims (1)

[Claims] (1) A feeding means for continuously feeding out the paper strip, a tensioning means for pulling the paper strip sent out by the feeding means in the feeding direction, and a tensioning means for pulling the paper strip, and A notch forming device for a paper strip, comprising a notch forming means for forming a notch in the paper strip, wherein the notch forming means abuts one surface of the paper strip and protrudes a rotary blade portion that is equal to the outer contour of the notch. a fixed blade member disposed opposite to the drum and slidingly in contact with the rotary blade body that opens when the drum rotates; What is claimed is: 1. A notch forming device for band-shaped paper, characterized in that it is constituted by a plurality of plate-shaped blades arranged in parallel without gaps.