JPS63123690A - Edge of cutter for cutting sheet-shaped article - 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 Field of Industrial Application This invention is for straight-cutting sheet-like materials, particularly relatively stiff packaging kraft paper, corrugated cardboard sheets, etc., in one long cutting process in a short time. Relating to the blade of a cutter for cutting sheet-like materials, sometimes used on the right.

Conventional technology When cutting relatively strong sheet-like materials (hereinafter simply referred to as sheets) such as kraft paper for packaging and corrugated pole sheets over long cutting dimensions, the shearing cutting principle is exclusively applied. Sharp scissors or shears are used.

In both scissors and shears, the sheet to be cut is sandwiched between two blades that engage with each other, and the sheet is cut by the shearing action of the two blades.

Problems to be Solved by the Invention The scissors and shears according to the prior art have two problems.
Since the shearing action of the two blades is used, in order to avoid biting the sheet to be cut and to cut it with good sharpness, the two blades used should have their cutting edges close to each other. , it is necessary to perform a precise sliding movement,
Therefore, not only is the adjustment delicate, but the structural member that supports the blade also needs to be highly accurate.

Therefore, the purpose of this invention is to use a single blade by applying the breaking action of one blade instead of the shearing action of two blades, so that no delicate adjustment is required. To provide a cutter blade for cutting sheet-like materials, which does not require a simple structural member for supporting the blade, and which suffices with a simple structural member supporting the blade.

Means for Solving the Problems The configuration of the present invention to achieve the above object is characterized in that the blade surface forming the serrated blade forms a periodic curve with a sharp apex n1. do.

Therefore, when this configuration is adopted, a member is provided as a receiver having a minute gap into which the blade surface can be inserted, and this receiver is provided with a sheet to be cut interposed between the member and the blade. When the relative distance between the member and the blade of the receiver is reduced so that the lunar surface is inserted into the minute gap, the sheet is first pierced at the sharp top of the blade surface, so a break point is created there. formed,
Thereafter, as time passes, the serrated blade formed on the blade surface tears the sheet, so a break line grows in the longitudinal direction of the blade starting from the break point, and eventually, over the entire length of the blade, It is able to complete the cutting of the sheet, and in addition, since the blade surface has a periodic curve, it works so that long cutting dimensions can be easily realized with a short stroke.

Example Hereinafter, embodiments will be explained with reference to the drawings.

The blade of the cutter for cutting sheet-like materials (hereinafter simply referred to as the blade) is formed by screwing a predetermined number of unit blades 12, 12, etc. onto one side of the elongated support member 11. Figure 1)
.

The unit blade 12 has a serrated blade 1 on one side of a rectangular thin steel plate.
2a, and cutouts 12b for screwing are formed on the opposite side thereof.

The support member 11 is a prismatic body having a predetermined length,
The lower surface is provided with supports 11G, 11G..., and the side surface thereof is provided with a notch 1 formed in the unit blade 12.
2b, 12b, screw holes 11a, 11a
...is established.

By screwing the set screws 11b, 11b... into the screw holes 11a, 11a... of the support member 11, a predetermined number of Unireto blades 12, 12... are attached to the support member 11.
Screw them in rows on the side of the board. At this time, the side of each unit blade 12 on which the serrated blade 12a is formed is made to protrude from the upper surface of the support member 11, and each unit blade 12, 12, . . . is in close contact with each other, Moreover,
By attaching the supporting member 11 at an angle with respect to the upper surface, the set of sides forming the serrated blade 12a as a whole has slopes 13b, 13b, etc. with a period equal to the length of one unit blade 12. and the top portions 13a, 13a-,! : The blade surface 13 is formed of a large sawtooth periodic curve (FIG. 2). Here, the highest corner from the upper surface of the support member 11 of each unit blade 12 is a top portion 13a, 13a of the blade surface 13 consisting of a sawtooth periodic curve.
..., and the sides forming the serrated blade 12a are slopes 13b, 13b... of the blade surface 13, and each top portion 13a, 13a... is pointed at a right angle. be.

The blade 10 is disposed opposite to a receiver member 20 having a minute gap d into which the blade surface 13 formed by the unit blades 12, 12, . . . can be inserted (FIG. 3).

The receiving member 20 has two L pieces for forming a minute gap d.
The shaped parts 21 , 22 are supported via the support channel 23 by an air cylinder 24 so that they can be raised and lowered, while the blade 1
0 is fixed via struts 11G, 11C, . . . .

However, the minute gap d of the receiver member 20 is the blade surface 1 of the blade 10.
The total length of the blade 3 shall be at least long enough and deep enough to accommodate the wave height (height h in FIG. 2) of the periodic curve created by the blade surface 13.

Now, the sheet S to be cut is placed between the blade 10 and the receiver member 20, and when the air cylinder 24 is driven to lower the receiver member 20, the tips of the L-shaped members 21 and 22 are attached to the sheet. Since S is pushed down, the blade surface 13 pierces the sheet S from below, cuts it, and is finally inserted into the minute gap d (double-dashed line in the figure). Here, if we pay attention to the time after the lower surface of the sheet S contacts the tops 13a, 13a... of the blade surface 13, the tops 13a, 13a... are themselves sharp, so they are easily pushed down. It is possible to pierce the lower surface of the sheet S, which is being broken, and break through this, creating a breaking point in the sheet S.

After that, when the member 20 is lowered and the sheet S is pushed down, the receiver will move along the slope 13b of the blade surface 13.
, 13b... cut the sheet S, so the breaking point grows as a breaking line in the longitudinal direction of the 10th blade,
The cutting of the sheet S can be completed when the entire blade surface 13 is submerged within the minute gap d.

Another embodiment The blade surface 13 can be provided with linear slopes 13b, 13b on both sides of each apex 13a, each having a serrated blade 14a, so that the entire blade surface 13 has a chevron-shaped periodic curve (FIG. 4). . When cutting the sheet S, the top portion 13a113a...
Since the growth of the break line after the break point is formed proceeds in both directions of each top portion 13a, there is no risk of unnecessary force being applied to the sheet S in the longitudinal direction of the blade 10, and therefore, The risk of wrinkles occurring on the cut surface of the sheet S can be minimized.

Further, instead of forming the blade surface 13 as a set of units 1 to 12, 12, etc., the blade surface 13 is formed as a single blade 14 of a predetermined length.
It goes without saying that it may be formed by combining any number of blades of appropriate length over a predetermined width (as shown in the same figure).

Roughly speaking, the overall shape of the blade surface 13 is a linear slope 13b,
13b-... and right-angled peaks 13a, 13a..., or a chevron-shaped periodic curve with linear slopes 13b, 13b on both sides of each peak 13a. A combination of linear slopes 13b, 13b... and acute-angled apexes 13a, 13a... (Fig. 5(A)), a circular or elliptical arc between each apex 13a, 13a... connected by slopes 13G, 13G, .
((C) in the same figure), or the top 13a,
13a may be connected by slopes 13d, 13d, etc., as shown in FIG.

In the above description, it is sufficient that the blade 10 and the bridge member 20 can be moved in a direction that shortens the relative distance between them, so any one or both of them can be moved. It is something that can be done. Furthermore, any linear drive source other than the air cylinder 24 can be used as the drive source for the movement.

Effects of the Invention As described above, according to the present invention, the blade surface forming the serrated blade forms a periodic curve with a sharp apex, thereby replacing the shearing action by two blades. Since it applies the breaking action of a single blade, it does not require any delicate adjustments, and therefore the structural members to support the blade do not require very high precision and can be simple. It has excellent effects.

In addition, since the blade surface forms a periodic curve, the drive stroke of the blade sinks the wave height of the periodic curve into the minute gap of the member, regardless of the required cutting length of the sheet. Therefore, a linear drive source with a small stroke can be used, and there is also the practical effect that the cutting time can be shortened.

[Brief explanation of the drawing]

1 to 3 show an embodiment, in which FIG. 1 is an explanatory overall perspective view, FIG. 2 is a schematic view of the blade surface, and FIG. 3 is an explanatory view of the state of use. FIG. 4 is a front view of main parts showing another embodiment. 5 (A> to D) are views corresponding to FIG. 2 showing different embodiments. 10...Blade 12...Unit blade 12a, 14a...Serrated blade 13...Blade surface

Claims (1)

[Scope of Claims] 1) A cutter blade for cutting sheet materials, the blade surface having a serrated edge forming a periodic curve with a pointed top. 2) The cutter blade for cutting sheet-like materials according to claim 1, wherein the blade is composed of a predetermined number of unit blades. 3) The cutter blade for cutting sheet-like materials according to claim 2, wherein the unit blade has a length corresponding to one period of the periodic curve.