JPS63123691A - Cutter device - 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 directed to a cutter device, particularly a sheet material (hereinafter simply referred to as a sheet) made of a relatively flexible material such as cloth, paper, rubber, etc. The present invention relates to a cutter device suitable for cutting straight lines at high speed over a long cutting size.

PRIOR ART In order to cut sheets, so-called scissors and push-cuts have been well known for a long time, but in both of these tools, two blades are brought into sliding contact with each other and intertwined, and during that time, an attempt is made to cut the sheet. Mainly, by sandwiching the sheets,
The sheet is cut by shearing. In these devices, of the blade surfaces of the two blades, only one point that intersects with the blade contributes to cutting the sheet, so when the cutting dimension is long, The blade can be reciprocated while moving the entire device forward, or
It is necessary to prepare a blade long enough to cover the entire cutting length.

Therefore, by providing a blade surface on the end face of a fixed or rotating cylindrical lower blade, and providing a rotary blade that slightly intersects and touches the moon surface, the sheet can be cut by shearing while using rotational movement. BACKGROUND OF THE INVENTION Shida cutter devices are well known. Since this device operates by rotational motion, even if the cutting size is long, there is no need to reciprocate the blade like scissors, so the drive mechanism is simple, and it can be used like a push-cut. Since it is not necessary to prepare a long blade, there is an advantage that the entire device can be made smaller.

On the other hand, cutting the sheet with a thin knife with a sharp tip is a technique that has been widely used for a long time.

Problems to be Solved by the Invention Each of these prior art techniques is associated with the following problems. That is, in the shearing type cutter device that uses rotational motion, the speed at which the lower blade and the rotary blade cut the sheet and the speed at which the cutter device itself advances are independent of each other. If the latter is too large compared to the former, wrinkles may occur in the sheet to be cut, making it impossible to cut smoothly; on the other hand, in the opposite case, the cutting ability will not be fully utilized. This results in poor cutting efficiency. Furthermore, in order to prevent the sheet from being accidentally caught between the two blades, it is essential to always apply appropriate tension to the sheet.
An unavoidable problem is that complex tensioning devices are required.

On the other hand, the cutting method using a knife not only requires a flat surface on the underside of the sheet to receive the tip of the knife, but also the part that contributes to cutting the sheets 1 to 1 is limited to the tip of the knife. As a result, the cutting performance of the knife is likely to deteriorate and the durability is poor.

It is also well known from experience that accurate cutting cannot be achieved with this type of sheet unless appropriate tension is applied to the sheet.

In view of the problems of the prior art, the purpose of the present invention is to introduce fracture by crushing instead of shearing or tearing as the cutting principle, thereby eliminating the need for the two blades to come into contact with each other. There is no need to apply any tension to the sheet to be cut, and by using a rotating blade, the entire circumference can be effectively used as a cutting edge, resulting in excellent durability. In addition, it is an object of the present invention to provide a new cutter device that does not cause wrinkles on the sheet by synchronizing the cutting speed and the advancing speed, and therefore does not have the possibility of disturbing the smoothness of the cutting operation. .

Means for Solving the Problems The configuration of the present invention for achieving the above object includes mounting a rotating cylinder on a traveling frame body, which rotates at the same circumferential speed as the traveling speed of the traveling frame body; The gist is that a rotary blade is provided that follows the rotation of the rotary cylinder while the cutting edge is pressed against the circumferential side of the rotary cylinder.

With this configuration, when the traveling frame is run with the sheet to be cut sandwiched between the rotary cylinder and the rotary blade, the sheet is at the contact point between the rotary cylinder and the rotary blade. Because of the intense pressure that is applied to the area, the area is locally crushed and broken, so if the traveling frame is moved forward, this broken area will continue as the contact point between the rotating cylinder and the rotating blade moves forward. form a broken line,
Therefore, while the sheet can be cut, since the rotating cylinder and the rotary blade are rotating at the same circumferential speed as the traveling speed of the traveling frame, the growth rate of the break line is Therefore, there is no possibility that wrinkles will form on the sheet.

Example Embodiments will be described below with reference to the drawings.

The cutter device C includes a traveling frame 10, a rotating cylinder 21, and a rotating blade 31 as main members (FIG. 1).

The traveling frame 10 includes a plate-shaped base 11 that is long in the front-rear direction, a guide piece 11a protruding from the lower surface of the base 11, and pillars 12 erected from the upper surface of the base 11. The guide 11a is fitted into a guide rail GR that defines a running path of the cutter device C, and the guide rail GR is connected to the cutter device C.
It is a grooved rail that supports the entire weight of the rail. A bracket 16.16 is fixed in parallel to the upper surface of the base 11, and a shaft 21a on which a rotating cylinder 21 is fitted is mounted on the bracket 16.16.

A gear 22 is fitted onto the shaft 21a, and the gear 22 meshes with a pinion 23 that engages with a rack R extending along the guide rail GR. Further, each tip of a chain CH1CH stretched parallel to the guide rail GR is fixed to the front and rear ends of the base 11.

A shaft 13a is inserted into the middle part of the column 12, and this shaft 13a
The base end portion of the swing frame 13 is pivotally attached to a.

Further, a rotary blade 31 is pivotally attached to the swing frame 13 via a shaft 31b.

The rotary blade 31 has a thin disk shape made of a superhard material such as high-speed tool steel (SKH material), and its peripheral edge is sharpened at an angle of about 60 degrees from both sides to form a cutting edge 31a. At the same time (FIG. 2), the shaft 31b and the shaft 21a are arranged parallel to each other so that the cutting edge 31a comes into contact with the periphery i of the rotating cylinder 21, and the former is located almost directly above the latter. has been done.

A cover frame 14 protrudes from the swing frame 13 so as to surround the upper half of the rotary blade 31 (FIG. 1). Further, a plate member 15a is provided protrudingly from the tip of the pillar 12, and an air cylinder 15 with a short stroke is fixed to this plate member 15a, and its rod 15b is attached to the cover frame 14.
By pressing the upper surface of the cover frame 14, a downward pressing force can be applied to the cover frame 14.

Now, if we apply tension to the chain Cl-1 on the front side (the left hand side in Figure 1, the same applies hereafter) and pull the base 11, the cutter assembly @C as a whole will be guided by the guide rail GR. and move forward (arrow A in the figure). At this time, since the pinion 23 is engaged with the rack R, it is rotated in the direction of the arrow in the figure, and therefore the rotating cylinder 23 is rotated in the direction of the arrow in the figure.
1 is simultaneously rotated in the direction of the arrow in the figure via the pinion 23 and gear 22.

Therefore, the number of teeth of the pinion 23 and the gear 22 is appropriately selected, and the advancing speed of the cutter device C, that is, the traveling frame 1
Assuming that the running speed of 0 and the circumferential speed of the rotating cylinder 21 are the same speed, when the air cylinder 15 is driven to press the cutting edge 31a of the rotating blade 31 against the circumferential side of the rotating cylinder 21, the rotating blade 31 follows the rotation of the rotating cylinder 21 and is driven at the same circumferential speed.

In this state, when the sheet S to be cut is held between the rotary cylinder 21 and the rotary blade 31, the sheet S
is sandwiched between the contact point between the circumferential side of the rotating cylinder 21 and the cutting edge 31a of the rotating blade 31. The rotary blade 31 is pressed in the direction of the rotary cylinder 21 by the air cylinder 15 via the cover frame 14 and the swing frame 13, and the blade edge 31a is formed thin. The force applied to the sheet S at the contact point becomes so strong that the sheet S is crushed and broken by the peripheral side of the rotating cylinder 21 and the cutting edge 31a of the rotary blade 31 at the contact point. Therefore, when the cutter device C is advanced by the chain CH, this breaking point grows linearly in the direction of movement as the cutter device C moves forward, forming continuous breaking lines S1 and Sl. Therefore, the sheet S can be cut along the breaking lines S1 and Sl.

Moreover, the traveling speed of the traveling frame 10 at this time, that is, the advancing speed of the cutter device C, the rotating cylinder 21, the rotating blade 3,
Since the circumferential speeds of rotating cylinder 2 are made to match,
The speed of the sheet S being gripped by the cutter device C and the rotary blade 31 completely matches the growth speed of the break lines S1 and S1, and therefore wrinkles occur in the sheet S in front of the cutter device C. Not at all. In addition, the sheet S simply needs to be held at the contact point between the rotating cylinder 21 and the rotating blade 31, and there is no need to receive any shearing force, so the sheet S is in a completely tension-free state. It can also be cut smoothly.

Even if the rotary blade 31 is made of carbide material, the cutting edge 31a will gradually become dull, but the air cylinder 15
By increasing the pressing force to the necessary and sufficient extent, the deterioration in cutting performance is slight.

In other words, when the pressing force is about 30 kg, the cutting edge 3
Even if the tip of 1a is blunted to a radius of curvature of about 0.2#, the sheet S made of cotton fabric can still be cut at a speed of 1IR/sec or more.

Note that when retracting the cutter device C, the base 11
It is sufficient to apply tension to the chain CH on the rear side, but it goes without saying that this chain CH may be a single chain connected in an annular manner to the chain CH on the front side. Generally speaking, when retracting the cutter device C, in order to prevent unnecessary wear of the rotary blade 31, the air cylinder 1 is
It is preferable to cut off the air supply to the rotary cylinder 21 and remove the pressing force of the rotary blade 31 against the rotary cylinder 21.

As described in detail, according to the present invention, a rotating cylinder and a rotating blade are mounted on a traveling frame, and the rotating cylinder rotates at the same circumferential speed as the traveling speed of the traveling frame. At the same time, the rotary blade is driven by the rotation of the rotary cylinder while the cutting edge is pressed against the circumferential side of the rotary cylinder, so that the sheet held in the contact point between the rotary cylinder and the cutting edge of the rotary blade is On the other hand, as the contact point progresses as the traveling frame moves, this fracture point grows into a continuous fracture line, so that the sheet is , it is possible to perform high-speed cutting using the advancing speed of the cutter device, and since the circumferential speeds of the rotating cylinder and rotating blade at this time match the traveling speed of the traveling frame, the growth of the break line is reduced. The speed is also
The advancing speed is the same as that of the cutter device, so there is no risk of wrinkles occurring in the sheet, and the cutting can be performed smoothly.In addition, since the sheet is not cut by shearing or tearing, the sheet is not cut at all. It has an extremely excellent effect that it can be in a tension-free, free state. In general, a rotary blade uses its entire circumference as a cutting edge, and its cutting performance does not deteriorate even if it becomes slightly dull, so it has excellent durability. There are also some effects.

[Brief explanation of the drawing]

1 and 2 show an embodiment, FIG. 1 is an explanatory perspective view of the entire assembly, and FIG. 2 is an explanatory view taken along the X arrow in FIG. 1. R... Rack 10... Traveling frame 13... Swinging frame 15... Air cylinder 21... Rotating cylinder 22... Gear 23... Pinion 31... Rotating blade 31a...・Blade tip

Claims (1)

[Scope of Claims] 1) a traveling frame; a rotating cylinder mounted on the traveling frame and rotating at the same circumferential speed as the traveling speed of the traveling frame;
A cutter device comprising: a disc-shaped rotary blade that follows the rotation of the rotary cylinder while having its cutting edge pressed against the circumferential side of the rotary cylinder. 2) The rotating cylinder includes a rack that extends along the traveling path of the traveling frame, and a pinion that engages with the rack;
2. The cutter device according to claim 1, wherein the cutter device is driven via a gear meshing with the pinion. 3) The rotary blade is pivotally connected to a swinging frame whose base end is pivotally connected to the traveling frame, and the swinging frame includes:
3. The cutter device according to claim 1, wherein the cutter device is pressed in the direction of the rotating cylinder by an air cylinder.