JPS6231272Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field of the Invention This invention relates to a paper cutting device used, for example, in a ticket issuing machine or a register.

Technical background of the invention and its problems For example, a meal ticket at a restaurant or the like is fully cut at both ends, with a stub cut in the center, and given to customers as the original and the original. The store takes an order, cuts it off at the stub cutter, takes one piece, and receives the remaining piece when the order is given to the customer. Selection between a stub cut and a full cut is also carried out for other purposes, but there are conventional methods shown in FIGS. 1 to 4 as specific means. That is, the movable blade 2 is rotatably provided along the fixed blade 1. The blade edge of the movable blade 2 has a front blade 3 and a rear blade 4.
A crank-shaped step 5 is formed at the boundary between the two blades 3 and 4. When making a stub cut, only the front blade 3 of the movable blade 2 is wrapped around the edge of the fixed blade 1, and when making a full cut, both the front blade 3 and the rear blade 4 are wrapped around the edge of the fixed blade 1. let

However, the stroke in the stub cut has a variation of S, but the boundary between the front blade 3 and the rear blade 4 becomes a step 5, and the change in blade thickness is too large relative to the stroke, as shown in Figure 5. The paper 6 has the disadvantage that a tear 7 is formed at the end of the stub cut.

Purpose of the invention This invention was devised in view of the above-mentioned points, and the object is to provide a paper cutting device that can perform stub cuts neatly.

Summary of the invention This invention forms a front blade and a rear blade on a movable blade that rotates along a fixed blade, and when making a stub cut, the stroke of the movable blade is limited and only the front blade wraps around the fixed blade. By connecting the front and rear blades with an arc or diagonal line, even if there are variations in the depth of cut into the paper at the end of the front blade,
It is constructed to prevent the stub cut end from tearing.

Embodiment of the invention An embodiment of the invention will be described with reference to FIGS. 6 to 12. Fixed blade 1 for cutter base 10
A movable blade 12 is held on one surface of the blade 12 so as to be rotatable about a fulcrum 14 while being urged in the return direction by a spring 13. The movable blade 12 is urged by a spring 15 so as to elastically join the side surface of the fixed blade 11. A cutter lever 16 is attached to the cutter base 10 so as to be rotatable around a pin 17. A pin 18 is provided upright at the tip of the cutter lever 16, and a long hole 19 into which the pin 18 fits is formed in the movable blade 12. has been done.

Thus, a front blade 20 and a rear blade 21 are formed on the edge of the movable blade 12. The front blade 20 is located on the fulcrum 14 side, and the rear blade 21 is located at the end far from the fulcrum 14. The edge of the movable blade 12 is polished at an acute angle so that the blade thickness changes with the border between the front blade 20 and the rear blade 21 serving as an apex 22. Therefore vertex 22
The blade thickness is the minimum. The apex 22 and the rear blade 21 are connected by a circular arc 23, and therefore, the blade thickness changes gradually in the circular arc 23.

In such a configuration, by rotating the cutter lever 16 clockwise about the pin 17, the movable blade 12 rotates counterclockwise about the fulcrum 14 while deflecting the spring 13, but the stroke is not shown in the figure. I don't do it, but it's a "stub cut"
It is selected by changing the "Full cut" set. In the case of a full cut, the stroke is large, and both the front blade 20 and the rear blade 21 wrap around the fixed blade 11. When making stub cuts, use smaller strokes. It is difficult to set the stroke at which the apex 22 cuts into the paper 6 due to variations in the dimensions and connections of each part, and variations S occur in the stroke of the movable blade 12 during stub cutting. The variation S in the depth of cut appears as the variation S' in the length of cut, and within the range of this length S', the width of cut of the movable blade 12, that is, the blade thickness increases with a smooth change.
Therefore, no tear occurs at the end of the stub cut of the paper 6 as shown in FIG. The same holds true even if the boundary between the front blade 20 and the rear blade 21 is smoothly connected by a diagonal line.

Effects of the invention Since this invention is constructed as described above, when making stub cuts, the stroke of the movable blade is limited and only the front blade, which is one step higher than the rear blade, cuts into the paper.
By setting the boundary between the front blade and the rear blade in a shape that connects with a circular arc or a diagonal line, it has the effect that even if the cutting depth of the front blade varies, the end of the stub cut will not break. be.

[Brief explanation of the drawing]

FIG. 1 is a side view of a part of a conventional example, FIG. 2 is an enlarged cross-sectional view of the - line part in FIG. 1, and FIG. 3 is an enlarged cross-sectional view of the - line part in FIG. Fig. 4 is an enlarged perspective view of a part of the movable blade, Fig. 5 is a plan view of the stub-cut paper, Fig. 6 is a side view showing an embodiment of this invention, and Fig. 7 is a bottom view thereof. , FIG. 8 is a side view of a part of the same, FIG. 9 is an enlarged sectional view of the part marked with - in FIG. 8, FIG. 10 is an enlarged sectional view of the part marked with - in FIG. The figure is an enlarged perspective view of a part of the movable blade, and FIG. 12 is a plan view of the stub-cut paper. 11...Fixed blade, 12...Movable blade, 14...Fully point, 20...Front blade, 21...Rear blade, 23...Circular arc.

Claims (1)

[Scope of utility model registration request] A plate-shaped movable blade along one side of the plate-shaped fixed blade is provided so as to be rotatable about a fulcrum with a stroke divided into two stages so that stub cut and full cut can be selectively performed, and the blade edge of the movable blade is A front blade is formed on the fulcrum side with the end of the cut of the stub cut as a boundary, a rear blade is formed at the end far from the fulcrum and is one step lower than the front blade, and the boundary between the front blade and the rear blade is formed with a blade. A paper cutting device characterized by having a shape connected by circular arcs or diagonal lines so that the thickness changes smoothly.