JPH04223893A - Rotary cutter - Google Patents

Abstract

PURPOSE:To set a cutting width dimension t4 at various values, without replac ing a lower blade group 5. CONSTITUTION:Lower blades 6, 7 in two kinds or more at least in different thicknesses t1 and t2 are fitted in the state of combining adequately to a shaft 2 for lower side fitting, and this is taken as a lower blade group 5.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary cutter used for cutting sheet-like materials such as aluminum foil or thin plates, synthetic resin films, and paper into predetermined widths along the longitudinal direction.

0002

2. Description of the Related Art Conventionally, as shown in FIG.
), a pair of left and right thin upper blades (30, 40) are attached to the lower attachment shaft (20) so that their positions can be changed freely, and a plurality of lower blades (60) are attached to the adjacent blade part (60a). Those installed with the two parts spaced apart are widely used. Each lower blade (60 mm) in this type of rotary cutter
) all have a blade part (60a) of a constant thickness, and by appropriately changing the attachment position of the upper blades (30) and (40), the workpiece can be cut into various width dimensions. .

0003

[Problem to be solved by the invention] However, the lower blade (
60), the blade portion (60a) is, for example, 5 m long.
It has a certain thickness (t1) such as m, and therefore the cuttable width (t4) is also 15 mm, for example.
The thickness of the lower blade (60), such as 20mm, 25mm, etc.
It can only be set in stages for each dimension determined by the sum of t1) and the mutual distance between the blade parts (t3). Therefore, when cutting a workpiece with small dimensions such as 16 mm, 23 mm, 26 mm, etc., it is necessary to replace the lower blade with a correspondingly thinner blade. The replacement work was somewhat troublesome and required a considerable amount of time and effort.

The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a rotary cutter that can cut workpieces into various sizes and widths without replacing the lower blade. With the goal.

[0005]

[Means for Solving the Problems] Therefore, the present invention provides a lower blade group to be attached to a lower mounting shaft with two blades having different thicknesses.
It is composed of a combination of more than one lower blade.

That is, it has a pair of upper and lower mounting shafts (1) and (2) arranged in parallel, and at least a pair of left and right upper blades (3) and (4) can be freely changed in position on the upper mounting shaft (1). while multiple lower blades (6) are attached to the lower mounting shaft (2).
In a rotary cutter in which (7) is attached with adjacent blade parts (6a) and (7a) separated from each other,
The lower blade group (5) attached to the lower mounting shaft (2) has two or more types of lower blades (with different blade thicknesses (t1) and (t2)).
6) The gist of the present invention is a rotary cutter characterized by being configured by a combination of (7).

[0007]

[Operation] Workpieces such as aluminum foil fed between the pair of left and right upper blades attached to the upper mounting shaft and the lower blade group attached to the lower mounting shaft are placed in the space between the upper blades. It is cut to the appropriate width. Therefore, by changing the mutual spacing between the upper blades, the workpiece can be cut into a width corresponding to the spacing. In this case, since the lower blade group is made up of a combination of at least two types of lower blades having different blade thicknesses, the cutting width dimension can be set to various values without replacing the lower blade.

[0008]

[Embodiment] Figs. 1 and 2 show an embodiment of the present invention. In the figures, (1) and (2) indicate a pair of upper and lower mounting shafts arranged in parallel, and (3) and (4) ) is the pair of left and right upper blades attached to the upper mounting shaft (1), and (5) is the thickness of the blade (t1) (t2) attached to the lower mounting shaft (2).
This is a lower blade group consisting of a combination of two types of lower blades (6) and (7) with different values.

[0009] The upper blades (3) and (4) have a single edge (3) on the periphery.
a) It is a thin disc-shaped thing having (4a), and is attached with its center part penetrated by the upper mounting shaft (1), and its position can be changed in the axial direction as necessary. ing.

On the other hand, the lower blade group (5) includes a plurality of lower blades (6
)(7). Each lower blade (6) (7
) are disk-shaped blade parts (
6a) (7a), and has a small diameter spacer holding portion (6b) (7b) formed protruding in the axial direction at the center thereof. Each of the lower blades (6) and (7) has its center penetrated by the lower mounting shaft (2), and is fixed with the adjacent blades in contact with each other. (6a) (7a
) There is a distance (t3) between them that corresponds to the distance holding portions (6b) and (7b). Each of the above upper blades (3)
(4) is in sliding contact with the lower blades (6) and (7) at corresponding positions, and the upper mounting shaft (1) and lower mounting shaft (2) are rotationally driven by a drive device (not shown). By doing so, the workpiece (A) such as aluminum foil fed between the upper blades (3) (4) and the lower blade group (5) can be (t4) is cut into a predetermined width corresponding to the width.

In this invention, the lower blade group (5) includes at least two blades having different blade thicknesses (t1) and (t2).
It is necessary to have a combination of lower blades (6) and (7) of more than one type. For conventional rotary cutters where the lower blade group is constructed by combining the same lower blades, the cutting width must be set only for each dimension determined by the sum of the blade thickness and the mutual blade spacing. I can't. On the other hand, as in the present invention, the blade thickness (t1) (t2)
By combining a plurality of two or more types of lower blades (6) and (7) with different values, it becomes possible to make the cutting width (t4) rich in variation. In this embodiment, in order to be able to set the cutting width (t4) in even smaller increments, the blade thickness (t1) is 2 mm and the thickness (t3) of the spacer (6b) is 1 mm. There are two types: a thin lower blade (6) set to are used, and these are combined in the arrangement shown in FIG. In this combined state, the distance between the blade parts of the adjacent lower blades (6) and (7) (t3
) are both set to 1 mm, and this adjacent blade part (6
a) (7a) With the upper blades (3) and (4) inserted between each other, the blade portions (6a) of the corresponding lower blades (6) and (7) are
) (7a). Therefore, the minimum cutting width (t4) is 2 mm, and after that, the mounting positions of the upper blades (3) and (4) are changed as necessary, as shown by the dotted line in Fig. 1. By changing the width, the cutting width can be set in units of 1 mm, such as 3 mm, 4 mm, 5 mm, 6 mm, and so on.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but any other method may be used as long as the lower blade group is composed of a combination of two or more types of lower blades having different blade thicknesses. Design changes are also permitted.

[0013]

[Effects of the Invention] As mentioned above, this invention is equipped with a pair of left and right upper blades and a lower blade group made up of a combination of a plurality of lower blades, and similarly to conventional products, it can cut the workpiece upward. Not only can it cut to a predetermined width depending on the spacing between the blades, but since the lower blade group is composed of a combination of a plurality of lower blades with different blade thicknesses, the spacing between the upper blades, i.e. The cutting width dimension can be varied. Furthermore, it is possible to set the cutting width dimension in small increments determined by the sum of the blade thickness of the thin lower blade and the mutual spacing between the blade parts. Therefore, the troublesome work of replacing the lower blade when changing the setting of the cutting width can be eliminated, thereby improving work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of a rotary cutter according to the present invention.

FIG. 2 is a side view of the rotary cutter.

FIG. 3 is a partially cutaway front view of a conventional rotary cutter.

[Explanation of symbols]

1... Upper mounting shaft 2...Bottom mounting shaft 3, 4...Upper blade 5...Lower blade group 6, 7...lower blade

Claims (1)

[Claims] Claim 1: A pair of upper and lower mounting shafts (1) and (2) arranged in parallel, and at least a pair of left and right upper blades (3) and (4) on the upper mounting shaft (1) can be freely changed in position. At the same time, a plurality of lower blades (6) (
In a rotary cutter in which 7) is attached with the adjacent blade parts (6a) and (7a) spaced apart from each other, the lower blade group (5) attached to the lower attachment shaft (2),
Two or more types of lower blades (6) with different blade thicknesses (t1) (t2)
) A rotary cutter comprising a combination of (7).