JPH0698541B2 - Roll paper cutter-Method for manufacturing fixed blade horn blade metal plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a roll paper cutter, and more particularly to a roll paper cutter that is used in a copying machine, a facsimile machine or the like to cut a roll paper into a predetermined length while rewinding the roll paper. The present invention relates to a method for manufacturing a blade metal plate having a fixed blade with horns.

[Conventional technology]

In this type of roll paper cutter, as shown in FIG. 4, both ends of the rotary blade 1 are rotatably supported on both side plates (not shown) by shafts 3, and the cutting edge of the nuclear rotary blade 1 is fixed blade 2. The cutting edge is inclined. On the other hand, the fixed blade 2 is rotatably supported on both side plates (not shown) by bearing shafts 4 at both ends thereof.
Moreover, the blade edge of the fixed blade 2 is pressed against the blade edge of the rotary blade 1 by the spring 6 via the pin 5 provided on the fixed blade 2. Further, as another configuration of the fixed blade 2, as shown in FIG.
In addition, the blade edge of the fixed blade 2 is supported by the leaf spring 8 and pressed against the blade edge of the rotary blade 1 by the leaf spring 8. When the rotary blade 1 is rotated by a driving device (not shown), the roll paper 11 placed between the rotary blade 1 and the fixed blade 2 is cut. In this configuration, the cutting start side end of the rotary blade 1 has the same cylindrical surface as that of the rotary blade 1 as a guide for preventing collision when the rotary blade 1 and the fixed blade 2 are engaged with each other. A guide ring 9 is attached integrally. Further, as another guide for preventing a collision when the blade tips of the rotary blade 1 and the fixed blade 2 are engaged with each other, as shown in FIG. There is a blade guide plate 10 provided on the same surface as the blade tip and protruding from the blade tip.

In the conventional technique for forming the blade tip guide on the rotary blade 1 or the fixed blade 2 as described above, in the case of the rotary blade 1, the guide ring 9 is formed as a separate part by molding, heat treatment, screwing, or In the case of the fixed blade 2, a strip-shaped steel plate is cut into a substantially L shape to form a protrusion and a blade portion. Or the protrusion small piece and the blade,
Molding, heat treatment, screws, etc.
Alternatively, it was fixed and integrated with a separately prepared blade base with an adhesive or the like (for example, Japanese Utility Model Publication No. Sho 57-19279) [Problems to be solved by the invention] The above-mentioned blade edges of the rotary blade and the fixed blade Among the means for configuring the blade guide for preventing collision during meshing, at the cutting start side end of the fixed blade, in the method of providing the blade guide plate protruding from the blade in the same plane as the flank of the fixed blade, The strip-shaped steel plate is cut into a substantially L shape to form the protrusion and the blade, or the protrusion small piece and the blade are formed as separate parts, respectively, heat-treated, screwed, or Although a method of adhering to and integrating with the blade base with an adhesive or the like was adopted, in this method,
It was uneconomical because it required an extremely large number of processing steps.

[Means for Solving the Problems] The present invention, at the cutting start side end of the fixed blade, a blade metal plate with a horn of a fixed blade provided with a blade guide plate protruding from the cutting edge in the same plane as the flank of the fixed blade. In the method of manufacturing, a first step of preparing a strip steel sheet having a predetermined width, and one side of the strip steel sheet prepared in the first step, at a predetermined position in the width direction of the strip steel sheet in parallel with a long side of the strip steel sheet. A second step of forming a continuous V-shaped groove, and a strip-shaped steel sheet having a continuous V-shaped groove formed in the second step is cut into a predetermined length to form a rectangular shape as designed, and at least one of the strip-shaped steel sheets At a predetermined position of the long side of the strip, a third step of making a cut from the long side to the V-shaped groove at a right angle to the long side, and a part of the V-shaped groove of the strip-shaped steel plate rectangular in the third step. It consists of the 4th step of cutting it into a blade plate with horns, and the strip steel plate is as designed. When the design shape is such that the predetermined length when cut into a predetermined length to form a rectangle of the design shape is the same size as the length of one blade plate with horns. The blade metal plate with a horn 1 has a predetermined length when the strip-shaped steel plate is cut into a predetermined length so as to have a rectangular shape as designed, and the rectangular shape has a designed shape.
In some cases, the design shape may be the total length of the individual pieces, the width dimension of the horn protruding from the cutting edge, and the groove width dimension of the notch.

Then, the horned blade metal plate is easily manufactured by grinding and finishing the folded portion of the blade metal plate with horn that is cut along the V-shaped groove to form the rake face of the blade of the fixed blade.

[Action]

In the present invention, in order to manufacture a blade metal plate with horns, first, a strip-shaped steel plate having a predetermined width is prepared, and for continuous folding at a predetermined position on one side of the strip-shaped steel plate in parallel with the long side of the strip-shaped steel plate. V-shaped groove is formed, and then cut into a predetermined length so as to have a rectangular shape as designed, and at least one long side of the rectangular steel plate has a predetermined position at a predetermined position. A notch blade metal plate can be easily manufactured by making a notch from the long side to the V-shaped groove at a right angle and partially cutting off the V-groove with the notch as a boundary so that the protrusion is left. Therefore, in the manufacturing process of the roll paper cutter, the man-hours for processing the fixed blade are greatly reduced.

〔Example〕

FIG. 1 is a perspective view showing an embodiment of the present invention. In FIG. 1 (A), the plate width of the strip-shaped steel plate 2a which is a material of the blade metal plate with horn of the fixed blade is the blade portion of the fixed blade. The blade width dimension of the blade plate with horn and the protruding dimension of the horn that protrudes as the horn of the blade plate with horn are combined with the final grinding allowance if necessary.

On one side of the strip-shaped steel sheet 2a, substantially parallel to the long side 2b of the strip-shaped steel sheet 2a, and from one long side 2b, the same size as the protruding height dimension of the horn projected as the horn of the blade plate with horns. Inside, before heat treatment of the strip steel plate 2a, or during heat treatment,
For example, a continuous V-shaped groove 2d is formed by a pressure roll.

Next, in FIG. 1 (B), one strip steel plate 2a is taken by, for example, a cutting grindstone, that is, a rectangular shape whose length is the length of one blade plate with horns. In addition, in a position to be the cutting end face 2e of the cutting portion, and the nucleus cutting end face 2e, the one long side 2b of the strip steel plate 2a relative to the rotation direction of the rotary blade of the roll paper cutter. Position, and when the surface provided with the V-shaped groove 2d is located opposite to the side where the rotary blade is located, from the cutting end surface 2e located on the cutting start side of the roll paper cutter, the blade metal plate with horns The width of the horn to be projected as the horn is separated from the long side of the strip-shaped steel sheet 2a at a position separated by a dimension considering the finish grinding margin as necessary, and from the one long side 2b to the V-shaped groove 2d. Make a cut 2f.

Next, in FIG. 1 (C), the blade metal plate with horns is folded along the V-shaped groove 2d with the notch 2f as a boundary, leaving a protruding portion 2g for protruding as a horn of the blade metal plate with horns. And

2 is a perspective view showing another embodiment of the present invention,
In (D) of the figure, the plate width of the strip-shaped steel plate 2a that is the material of the blade metal plate with horn of the fixed blade is twice the blade width dimension of the blade metal plate with horn that constitutes the blade portion of the fixed blade, if necessary. It is dimensioned in consideration of the margin for finish grinding.

On one side of the strip steel plate 2a, substantially parallel to the long side of the strip steel plate 2a,
In addition, the V-shaped groove 2d is formed in the central portion of the strip-shaped steel plate 2a as in the first embodiment.

Next, in FIG. 2 (E), the strip steel plate 2a is
With a cutting grindstone, a rectangle that has a design shape as two pieces, that is, the total length of the length of one blade plate with a horn, the width of the horn protruding from the cutting edge, and the groove width of the cut. Is cut into a rectangular shape, and at the same time, at a position that becomes the cutting end face 2e of the cutting portion, and the cutting end face 2e rotates the long edges 2b and 2b 'of the strip-shaped steel plate 2a, respectively. Position relative to each other, and when the surface provided with the V-shaped groove 2d is located opposite to the side on which the rotary blade is located,
The cutting end face of the roll paper cutter that is located on the cutting start side
2e, 2e, the width of the horn protruding as a horn of the blade plate with horns, if necessary by a dimension that considers the allowance for finish grinding, at a position approximately perpendicular to the long side of the strip steel plate 2a, and each length Notches 2f, 2 extending from sides 2b, 2b 'to V-shaped groove 2d
Apply f ′.

Next, in FIG. 2 (F), the notch 2f, 2g ′, which is to be projected as the horn of the blade plate with horn, is left, and the cut 2f
Then, the blade metal plate is cut along the V-shaped groove 2d in the portion sandwiched between the notch 2f 'and the notch 2f' to form a blade plate with horns.

Grinding and finishing the folded portion of the blade metal plate with horn obtained by the method described above to make a blade metal plate with horn by making it a rake face of the blade, and with the blade metal plate with horn alone Forming a fixed blade, or a blade stand for a fixed blade separately prepared, screwed or integrally fixed by an adhesive, and ground and finish the folding section and the blade stand at the same time,
A fixed blade can be obtained by using the rake face of the blade.

In the above-described two embodiments, the strip-shaped steel plate 2a is cut into a rectangular shape as designed, and the long side 2b or the long sides 2b and 2b 'is changed to V.
Although the description has been given for the content of making the cut 2f reaching the shaped groove 2d, or the cut 2f, 2f ′, the strip steel plate 2a is cut into a large number of rectangles according to the design shape, and then the rectangular steel plate is cut. 2f or 2f 'extending from the long side 2b or the long side 2b' to the V-shaped groove 2d may be provided, and the difference in the processing order of cutting and notching does not matter.

FIG. 3 is a perspective view showing an embodiment of a roll paper cutter using a blade metal plate with a horn for a fixed blade according to the manufacturing method of the present invention, and FIG. 3 (G) is a blade metal plate with a horn itself. Is a fixed blade, and (H) is a blade metal plate with horns fixedly integrated with a separately prepared blade base.

〔The invention's effect〕

As described above, in the present invention, the blade metal plate with a knuckle of a fixed blade is provided at the cutting start side end of the fixed blade, which has a blade guide plate protruding from the cutting edge in the same plane as the flank of the fixed blade. In addition, as in the conventional manufacturing method, the strip-shaped steel plate is cut into a substantially L shape to form the protruding portion and the blade portion, or the protruding portion small piece and the blade portion are provided as separate parts. It eliminates the work requiring extremely man-hours such as molding, and provides a manufacturing method capable of obtaining a blade plate with horns by a very simple means. Of these, the number of man-hours for processing the fixed blade is greatly reduced, which has a great economic effect.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention. FIG. 2 is a perspective view showing another embodiment of the present invention. FIG. 3 is a perspective view showing an embodiment of a roll paper cutter using a blade plate with a horn according to the present invention. FIG. 4, FIG. 5, and FIG. 6 are perspective views showing a conventional roll paper cutter. 1 ... Rotating blade, 2 ... Fixed blade 3 ... Axis, 4 ... Bearing shaft 5 ... Pin, 6 ... Spring 7 ... Bearing pedestal, 8 ... Plate spring 9 ... Guide ring, 10 ... … Blade guide plate 11 …… Roll paper, 2a …… Strip steel plate 2b, 2b ′ …… Long side, 2d …… V-shaped groove 2e …… Cut end face, 2f, 2f ′ …… Cut 2g, 2g ′ …… Projection Department

Claims (3)

[Claims] 1. A rotary blade having both ends rotatably supported and a cutting edge formed on the circumferential surface of rotation, and a fixed blade having a cutting edge formed on a side end of a spring acting on the fixed blade. By force,
A fixed blade of a roll paper cutter configured such that the blade edge of the rotary blade and the blade edge of the fixed blade are in pressure contact with each other, at the cutting start side end of the fixed blade, protruding from the blade edge on the same plane as the flank of the fixed blade. In a method of manufacturing a bladed metal plate with a horn having a fixed blade provided with a blade guide plate, a first step of preparing a strip-shaped steel sheet having a predetermined width, and one side of the strip-shaped steel sheet prepared in the first step, The second step of forming a continuous V-shaped groove parallel to the long side of the strip-shaped steel sheet at a predetermined position in the width direction, and the strip-shaped steel sheet having the continuous V-shaped groove formed in the second step are formed into a rectangular shape as designed. And a third step of cutting the strip-shaped steel sheet into a predetermined position on at least one long side of the strip-shaped steel sheet at a predetermined position at right angles to the long side to reach the V-shaped groove. Part of the V-shaped groove of the strip-shaped steel plate made into a rectangular shape is cut to form a blade plate with horns. Method for producing a horn with blade gold plate, characterized by comprising a step. 2. A predetermined length when a strip-shaped steel plate is cut into a predetermined length so as to have a rectangular shape according to the design shape and has a rectangular shape according to the design shape is the same as the length of one blade plate with horns. The method for manufacturing a blade plate with horn according to claim 1, which has a designed shape that is dimensioned. 3. A predetermined length when a strip-shaped steel sheet is cut into a predetermined length so as to have a rectangular shape as designed, and a rectangular shape as designed has a predetermined length corresponding to one blade plate with a horn and a cutting edge. The method of manufacturing a blade plate with horn according to claim 1, which has a design shape that is a total dimension of a width dimension of the horn and a groove width dimension of the notch to be further projected.