JPH0197596A - Cutter roll - Google Patents

Abstract

PURPOSE: To prevent the core section of a cut member from fuzzing by positioning segments of a specific shape widthwise and fixing them to a cutter roll body with brace members to hold them appropriately on the cutter roll body. CONSTITUTION: The bottoms of a pair of segments 4, which are designed to have an edge point that stays inside a cylindrical surface of the same diameter as guide rings 3a and 3b formed on a cutter roll body 3, are brought close on two parallel planes 3c of the cutter roll body 3, and both their widthwise edge faces 4a at the base portion are fitted between guide surfaces 3d of the cutter roll body 3 to position the segments 4 widthwise. At the same time, wedgelike brace members 6 are fitted between dovetailed inclined surfaces 4a and 4b on both the axial end faces of the segments 4 and the inclined surfaces of the guide rings 3a and 3b to hold the segments 4 fixed without applying any bending force to the cutter roll body 3. Such fixation of the segments 4 in position prevents the cut section of paper objects from fuzzing.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a rotary push cutter mainly used for cutting fibrous sheet materials such as paper and cloth (hereinafter referred to as paper containers) into irregular shapes. This relates to a cutter roll for cutting.

[Conventional technology]

BACKGROUND ART Conventionally, cutter rolls used for cutting paper containers have mainly been made in one piece by heat-treating materials such as high-speed tool steel 1 alloy tool steel.

Fig. 2 shows a conventional rotary push-off cutter roll and a mating roll (anvil roll) 2 which are made of one piece, and these are indicated by arrows 1'-2' whose circumferential surfaces facing each other are in the same direction. It is rotated in the direction of rotation. A strip-shaped material to be cut 7 whose cross-sectional shape is indicated by a two-dot chain line is fed between the two rolls by a pinch roll (not shown) provided on the front side of the page, and cut into a desired shape or length. Ru. FIG. 3 is a cross-sectional view of FIG. 2. In addition,
The flanges 1a and 1b are guide shafts for ensuring that the cutting edge of the cutter roll tool approaches or contacts the mating roll 2 correctly.

[Problem that the invention seeks to solve]

Among the above-mentioned cutter rolls, those made of high-speed tool steel and alloy tool steel have low hardness, leading to early wear of the cutting edge and the need for frequent re-sharpening. Furthermore, since the conventional cutter roll is a one-piece product, there is a problem in that the cost of manufacturing the roll is high.

In order to ensure the durability of the cutting edge, if the conventional high-speed tool steel 1 alloy tool steel is simply replaced with cemented carbide, various ceramics, etc., these materials are expensive, so the cutter roll is very expensive. Become something. Therefore, by segmenting only a suitable portion including the cutting edge and holding it with a cutter roll main body made of steel or the like, a cutter roll with excellent durability of the cutting edge can be obtained at a relatively low cost.

However, test results have shown that if the segments are held improperly, the blade edges may not be in the correct proximity, resulting in problems such as fuzzing of the cut surface of the material to be cut and loss of durability of the blade edge. found.

The present invention provides a cutter roll that prevents the above problems by properly holding the segments.

[Means for solving problems]

The present invention provides a cutter roll that rotationally presses and cuts a material to be cut fed between the rolls by bringing a linear cutting edge formed on the peripheral surface close to or in contact with the cylindrical peripheral surface of the mating roll. The cutting edge is provided on a segment fixed to the outer periphery of the cutter roll main body, which is the main part of the cutter roll.

The segment has tabtail-shaped inclined surfaces on both end surfaces in the axial direction of the cutter roll body, and at least one of the end surfaces has a protrusion fitted between the inclined surface and a surface provided on the cutter roll body opposite to the inclined surface. The cutter roll is fixed by being pressed by a tension member, and is characterized in that a bending force opposing member is provided on the opposite side of the axis of the cutter roll main body with respect to the segment.

[Effect]

When rotating and cutting fibrous sheet materials, etc., the cutting edge line must be properly close to or in contact with the mating roll.
If this is incomplete, the cut material will stick together, making it impossible to continue working, the cut will become fuzzed, and the cutting edge will wear out prematurely. That is, in order to obtain correct cutting conditions with a segmented cutter roll, it is necessary to securely fix the segments to the cutter roll body and to prevent the cutter roll from being bent.

As a result of various tests, it was found that the appropriate method is to make both axial end faces of the segment a tabtail-shaped inclined surface and press this surface. According to this method, the bolts for moving and holding the segment and the object to be cut are It has been found that interference with the cutter roll or wrapping of the cut object can be prevented, but this method does not easily cause large bends in the cutter roll body.

The present invention presses the tabtail-like inclined surface and prevents the resulting bending by providing a counter member on the opposite side of the segment.

〔Example〕

FIG. 1 is a diagram showing the structure of an embodiment of the present invention, in which A is a cross-sectional view of the central portion taken along a plane including the axis, B is a cross-sectional view taken along the rollers, and C is a top view.

The cutter roll -@- has a two-handed surface 3C13c parallel to the axis between the brim-shaped guide wheels 3a and 3b of the cutter roll main body 3, and the inner wall surfaces of the guide shafts 3a and 3b become closer to the axis. It is a planar inclined surface in a direction in which the mutual gap therebetween decreases.

A pair of segments 4.4 formed so that the cutting edges are accommodated within a cylindrical surface having the same diameter as the guide wheels 3a, 3b have their bottom surfaces in close contact with the parallel two-handed surfaces 3c, 3c of the cutter roll main body 3,
Further, both widthwise edge surfaces 4C14C of the root portion are positioned in the width direction by guide surfaces 3d, 3d provided on the cutter roll main body 3, and tabtail-shaped inclined surfaces 4a, 4b on both axial end surfaces thereof are positioned by the tension member 6. It is firmly held by the cutter roll main body 3 by being pressed with a pressure of .6. That is, the segment 4 has its tabtail-like inclined surfaces 4a, 4.
b is provided in a wedge-like manner between the surface provided on the cutter roll main body 3 facing the inclined surface, and the bolt 5
It is held by a tension member 6 that is tightened by.

In this embodiment, the positioning of the segment 4 in the width direction is performed by fitting both edge surfaces 4c, 4c between the guide surfaces 3d, 3d provided on the cutter roll main body 3, so that correct positioning can be easily performed.

However, the present invention is not limited thereto, and it is possible to apply known positioning means such as knock pins, and further, the segments may be fixed while adjusting the widthwise position without using these positioning means by contact.

Furthermore, in this embodiment, the tension members 6 are provided at both ends of the segment 4 in the axial direction in order to improve the machining accuracy of the cutter roll body 3, but the present invention is not limited to this, and the tab tail-shaped inclined surface of the segment It may be modified such that one side is directly engaged with a surface provided on the cutter roll body 3, and the surface that receives the tension member 6 is a surface perpendicular to the axis.

In the present invention, since a bending action occurs on the cutter roll body as the segments are fixed, it is necessary to provide a counter member to counter this, and this counter member adjusts its action according to the bending action of the segments. In addition to the structure in which a plurality of segments are provided so as to oppose each other as in the above-mentioned embodiment, a dummy structure, that is, a structure in which no cutting action is performed and only an opposing action is performed may also be used.

〔Effect of the invention〕

As described above, the cutter roll of the present invention.

In particular, segments are manufactured from highly hard and wear-resistant materials such as cemented carbide and various ceramics, and these are firmly and precisely fixed to the cutter roll body without bending. This makes it possible to prevent deterioration in cutting quality such as fuzzing without impairing high abrasion resistance.

Although at least one of the present invention has been described using a fibrous material to be cut, the present invention is not limited thereto, and can be applied to metals and other non-fibrous materials.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 shows the structure of an embodiment of the present invention, in which A is a vertical sectional view taken along a plane including its axis, B is a Rollo sectional view of A, and C is a top view. , FIG. 2 is a diagram illustrating the conventional cutter roll top, the mating roll 2 and its operation, and the third
The figure is a cross-sectional view of FIG. 2. Engineering: Conventional cutter roll, 1a, 1b: Guide shaft. 1c: cutting edge, 2: mating roll, 1', 2': drive rotation direction, main: cutter roll of the present invention, 3: cutter roll body, 3 a, 3 c: guide wheel, 4: segment, 4
a, 4c: tabtail-shaped inclined surface, 6: tension member, 7:
Material to be cut. Figure 1 B (low a)

Claims (1)

[Scope of Claims] 1. A cutter roll that rotationally presses and cuts a material to be cut that is fed between the two rolls by bringing a linear cutting edge formed on the peripheral surface close to or in contact with the cylindrical peripheral surface of a mating roll. The cutting edge is provided on a segment fixed to the outer peripheral part of the cutter roll main body, which is the main body of the cutter roll, and both axial end surfaces of the cutter roll main body are tabtail-shaped inclined surfaces, and the segment has tabtail-like inclined surfaces. At least one of them is fixed by being pressed by a tension member fitted between the inclined surface and a surface provided on the cutter roll body facing the cutter roll body, and the axis of the cutter roll body is fixed to the segment. A cutter roll characterized in that a bending action opposing member is provided on the opposite side of the core. 2. The cutter roll according to claim 1, wherein the segments are provided symmetrically with respect to the axis of the roll body. 3. The cutter roll according to claim 1 or 2, wherein the segment is fixed to the roll body via a shim. 4. The cutter roll according to any one of claims 1 to 3, wherein the segments are made of ceramics.