JPH0730297Y2 - Paper cutter - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a linear fixed blade of a roll paper recorded by a copying machine or a facsimile transmission device, and a circular blade that rotates while pressing the fixed blade. The present invention relates to a paper cutter that is cut by.

[Conventional technology]

As a conventional paper cutter of this type, Shokai 62-1170
A paper cutter disclosed by Japanese Patent No. 96 is known.

In these conventional techniques, as shown in FIG. 8, a tool rest 3 in which a round blade 1 is rotatably supported is guided linearly by a tool rest guide rail 5. On the other hand, a straight fixed blade 2 is provided in parallel with the tool post guide rail 5, and
As shown in the schematic plan view of the drawing, the round blade 1 is pivotally supported so that its side surface is slightly inclined and contacts the cutting edge line of the fixed blade 2, and the cutting edge of the round blade 1 is The cutting point A on the lower left side of the center is pressed against the cutting edge of the fixed blade 2 to cut the sheet or the like at the cutting point A.

Therefore, in this type of paper cutter, the round blade 1
Since the paper cutting by the fixed blade 2 and the fixed blade 2 is performed at the cutting point A, the paper cutting of the paper cutter is performed only when the tool rest 3 travels to the left, and the paper travels to the right. The return stroke of the tool rest 3 to the sheet cutting start position is performed, and one cut is performed in the reciprocating stroke of the tool rest 3.

In FIG. 8, reference numeral 8 is a tool post drive wire connected to the tool post 3.

On the other hand, in recent years, there has been a demand for development of a device capable of switching the inclination of the round blade with respect to the fixed blade in accordance with the traveling direction of the tool post so that cutting can be performed in both reciprocating strokes of the round blade. The cutting device disclosed by Japanese Patent Publication No. 87184 is known. That is, as shown in the schematic plan view of FIG. 10, three rollers 33a, 33b, 33c rotatably provided on the upper portion of the rotary blade supporting member 25 are used, and the central roller 33b is used as the guide rail 5. The rollers 33a and 33c are always brought into contact with each other, and the other rollers 33a and 33c are arranged at a position retracted from the guide rail 5 as compared with the roller 33b at the center thereof. The two rollers come into contact with the guide rail 5, whereby the inclination of the round blade 1 with respect to the fixed blade 2 is switched for each reciprocating stroke.

[Problems to be solved by the device]

However, in this type of conventional cutting device, at least three rollers are required, which complicates the device and requires a space for mounting at least three rollers, and in addition, the rotary blade support member 25 requires space. Because of the required structure, it has been impossible to demand miniaturization of the device as a whole.

The present invention has been made in view of the above circumstances, and the inclination of the round blade with respect to the fixed blade travels on the turret so that it can be cut in both of the reciprocating strokes of the round blade with a simple and compact structure. The purpose is to provide a paper cutter that can be easily switched according to the direction.

[Means for Solving the Problems]

In order to achieve the above object, the present invention provides a pair of upper and lower tool rest guides in which guide grooves are provided on both the upper surface and the lower surface of a tool rest in which a round blade is rotatably supported, and the guide grooves are linearly provided. While fitting the rail to run the turret along the turret guide rail, the fixed blade provided in parallel to the turret guide rail is pressed against the blade tip of the round blade and the round blade and the In a paper cutter for cutting a paper sheet or the like placed between a fixed blade, the upper and lower pair of tool post guide rails are provided so as to face each other in a plane perpendicular to the center line in the width direction of the guide groove of the tool post. , The shape of the guide groove on the upper surface and the lower surface of the tool post, the minimum width in a plane perpendicular to the spindle axis of the round blade, formed into a bow tie shape gradually widening toward both sides in the running direction, Drive wire for running the tool post The is characterized in that sealed joint running direction on both sides of the tool rest in at a location remote to the circular blade side of the plane perpendicular to the width direction center line of the guide groove.

In the case of a paper cutter having guide grooves on both the front and rear surfaces of the tool post, a pair of front and rear tool post guide rails are provided so as to face each other in a horizontal state, and guide grooves on the front and rear surfaces of the tool post are provided. The minimum depth in the plane perpendicular to the spindle axis of the round blade, is formed so as to gradually deepen toward both sides in the traveling direction, and a drive wire for traveling the turret is formed. The turret is connected to both sides in the traveling direction at a position distant from the vertical plane parallel to the traveling direction including the center of gravity to the round blade side.

[Action]

Next, the operation of the present invention will be described. The shape of the guide grooves provided on the upper and lower surfaces of the tool post is the minimum width in the plane perpendicular to the spindle axis of the round blade, that is, the width that allows it to slide on the guide rail and fit without play. , The opening range of the groove that gradually widens around the center point of the groove width direction of the minimum width part of the guide groove as it is formed in a bow tie shape that gradually widens toward both sides in the traveling direction Can be rotated in both directions.

On the other hand, the drive wire for running the turret is connected to both sides of the tool post in the running direction at a position separated from the plane perpendicular to the widthwise center line of the guide groove to the round blade side, When tension for running is applied to the tool post, the tool post is rotated until the side surface of the bow tie-shaped guide groove comes into contact with the guide rail, and as a result, the round blade pivotally supported by the tool post has a tip in the running direction. By tilting so as to press against the fixed blade and forming a pressing contact cutting point by the fixed blade edge and the round blade edge, reliable roll paper cutting in the traveling direction is performed. Further, when traveling in the opposite direction to the traveling direction, the drive wire that had been tensioned until then becomes the loose side wire, and the tension acts on the drive wire that was previously the loose side wire, so The side opposite to the side of the bow tie-shaped guide groove is rotated in the opposite direction until it comes into contact with the guide rail, and the round blade is inclined so that the tip in the traveling direction opposite to the traveling direction presses against the fixed blade, Similar to the traveling direction, the roll paper is surely cut even when traveling in the opposite direction.

〔Example〕

Next, an embodiment of the paper cutter according to the present invention will be described with reference to the drawings.

1 to 3 show one embodiment of the present invention. FIG. 1 is a front view of this embodiment, and FIGS. 2 and 3 are a side view and a plan view, each of which is a partial cross section.

Turret 3 with a round blade 1 rotatably supported in the center of the running direction
Guide grooves 4 are provided on both the upper surface and the lower surface of the tool and are slidably fitted to a pair of upper and lower linear tool rest guide rails 5 integrally provided with the cutter frame 7. The guide groove 4 has a minimum width in an in-plane EE perpendicular to the axis of the support shaft 6 of the round blade 1, that is, a groove width that is slidable with the tool rest guide rail 5 and maintains a state without play, It is formed into a bow-tie-shaped groove that gradually widens toward both sides in the traveling direction, and is a groove that is almost vertically symmetrical. on the other hand,
The tool rest guide rails 5 are provided so as to face each other within a plane FF perpendicular to the center of the guide groove 4 in the width direction, and the tool rest 3 can travel back and forth in both directions along the tool rest guide rails 5 by the guide grooves 4. ing.

A drive wire 8 is connected to both sides of the tool rest 3 in the traveling direction, and the drive wire 8 is formed in a loop shape, and the tool rest 3 is towed to the left or right by a driving means (not shown).

Drive wire 8a when the turret 3 is traveling to the left
Is the pulling side, and the wire 8b on the opposite side is the loosening side. On the other hand, the drive wires 8a and 8b are placed at a position apart from the surface FF perpendicular to the center line in the width direction of the guide side 4 on the side of the round blade 1 and the tool post 3
Since it is connected to both ends of the tool, the pulling force by the drive wire 8a acts on the tool rest 3 as a rotational moment about the center point in the groove width direction of the minimum width portion of the guide groove 4, and the tool rest 3 Is the tool post guide rail 5 as shown in FIG.
It is rotated until the side surface of the guide groove 4 comes into contact with the side surface thereof.
As a result, as shown in FIG. 5, the blade tip of the round blade 1 pivotally supported by the tool rest 3 presses against the blade tip of the fixed blade 2 at the lower left position to form a cut portion A point, and the tool rest 3 Paper is cut by traveling to the left. When the tool rest 3 travels to the right, the motion proceeds in the opposite manner to the above, the cutting portion is formed on the lower right side of the round blade 1, and the paper cutting is performed by traveling to the right. When these tool rests 3 are running, the circular blade 1 is rotationally driven to the left or right by a rotation transmitting means (not shown), or is rotated by the swiveling force of the blades pressing each other.

While the sheet is being cut, the tool rest 3 is rotated to the left or right as described above, whereby the blade edges of the round blade 1 and the fixed blade 2 are pressed against each other to form a cutting portion, thereby cutting the sheet. It

Next, in addition to the above-described embodiment, a cutter frame 7 provided with shifters 9 on both end sides will be described with reference to FIG. The rear surface of the tool rest 3 has a thick central portion and is a wedge surface 3a that is inclined in the traveling direction. Shifters 9 are provided at both ends of the cutter frame 7 so as to face the wedge surface 3a. The tool post 3 which has completed the cutting in one direction and has traveled to the end of the cutting stroke has the inclination of the round blade 1 up to that point due to the cam mechanism of the wedge surface 3a provided on the rear surface of the tool post 3 and the shifter 9. It is rotated to the opposite slope, ready for the next cut in the opposite direction. By providing the wedge surface 3a and the shifter 9, the inclination of the round blade 1 with respect to the fixed blade 2 can be always switched at the same timing. In FIG. 6, the shape of the shifter 9 is a wedge surface 3a.
Although the wedge shape that matches the above is shown, any shape may be used as long as it can switch and rotate the tool rest 3 by contacting the wedge surface 3a.

In the embodiment detailed above, the tool post guide rails 5,
Further, although the guide groove 4 of the tool rest 3 is provided in the vertical direction, the same effect can be obtained when the tool post guide rail 5 and the guide groove 4 are provided in the front and rear direction as shown in FIG. In this case, the guide grooves 4 have the same width, the depth of the grooves is shallow at the center and gradually increases toward both sides in the traveling direction, and the connecting position of the drive wire 8 is set at the center of gravity of the tool rest 3. The tool rest 3 can be rotated in the same manner as in the first embodiment by setting the position away from the vertical plane GG including the point and parallel to the traveling direction to the round blade side. Further, in FIG. 7, the guide groove 4 and the guide rail 5 are illustrated as having the same front and rear heights, but it is needless to say that the front and rear heights may not be the same as long as they face each other in a horizontal state.

[Effect of device]

According to the present invention described above, by rotating a tool rest that pivotally supports one round blade to the left and right, the round blade is inclined with respect to the fixed blade, and the tip of the round blade is pressed against the tip of the fixed blade. A cutting section is obtained in the left and right traveling directions, whereby cutting of paper etc. is carried out at each reciprocating traveling stroke of the tool post, and it becomes possible to meet the demand for an increase in the number of cutting processes, and as in the prior art. Since the inclination of the round blade can be easily switched by the guide groove provided on the tool rest without the need for rollers, the device can be made smaller and lighter.

Also, as a result of being able to cut each traveling stroke, idle traveling becomes zero, and the useful life of the round blade is extended.

[Brief description of drawings]

1 to 5 are views showing an embodiment of the present invention. FIG. 1 is a front view, FIG. 2 is a side view of a partial cross section of FIG. 1, and FIG. 3 is one of FIG. It is a top view of a section, and Drawing 4 and Drawing 5 are figures showing a rotation state. 6 and 7 are views showing other embodiments, FIG. 8 and FIG.
FIG. 10 and FIG. 10 are views showing a conventional cutting device. 1 ... Round blade, 2 ... Fixed blade 3 ... Turret, 4 ... Guide groove 5 ... Turret guide rail 6 ... Spindle, 7 ... Cutter frame 8 ... Drive wire, 9 ... Shifter

Claims (4)

[Scope of utility model registration request] 1. A guide groove is provided on both an upper surface and a lower surface of a tool post on which a round blade is rotatably supported, and the guide grooves are fitted to a pair of upper and lower tool post guide rails provided linearly. While running the tool rest along the tool rest guide rail, while pressing the blade tip of the round blade to the fixed blade provided in parallel to the tool rest guide rail, between the round blade and the fixed blade In a paper cutter that cuts placed paper etc.
The pair of upper and lower turret guide rails are provided so as to face each other in a plane perpendicular to the widthwise center line of the guide groove of the turret, and the shape of the guide grooves on the upper surface and the lower surface of the turret is set to the round blade. The minimum width in a plane perpendicular to the spindle axis of the, and formed in a bow tie shape that gradually widens toward both sides in the traveling direction, and a drive wire for traveling the tool rest is formed in the widthwise center of the guide groove. A paper cutter characterized in that it is connected to both sides of the tool post in the running direction at a position distant from the plane perpendicular to the line to the round blade side. 2. The rear surface of the tool post is formed into a wedge shape having a thick center part in the tool post and inclined toward both sides in the traveling direction, and shifters opposed to the wedge shape are provided on both end sides of the cutter frame. The paper cutter according to item 1. 3. A guide groove is provided on both a front surface and a rear surface of a tool post on which a round blade is rotatably supported, and the guide grooves are fitted to a pair of front and rear tool post guide rails provided with the guide grooves in a linear shape. While running the tool rest along the tool rest guide rail, while pressing the blade tip of the round blade to the fixed blade provided in parallel to the tool rest guide rail, between the round blade and the fixed blade In a paper cutter that cuts placed paper etc.
The pair of front and rear turret guide rails are provided so as to be opposed to each other in a horizontal state, and the depth of the guide groove on the front surface and the rear surface of the turret is set to be the minimum depth in a plane perpendicular to the spindle axis of the round blade. , The driving wire for running the tool rest is formed so as to gradually deepen toward both sides in the running direction, and the drive wire for running the tool rest is separated from the vertical surface parallel to the running direction including the center of gravity of the tool rest to the round blade side. A paper cutter characterized by being connected to both sides of the turret in the traveling direction. 4. The rear surface of the tool post has a wedge shape in which the center part of the tool post is thick and is inclined on both sides in the traveling direction, and shifters opposed to the wedge shape are provided on both end sides of the cutter frame. The paper cutter according to item 3.