JPH0711909Y2 - Paper cutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a paper cutter for cutting roll paper recorded by a copying machine, a facsimile transmission device or the like.

[Conventional technology]

Conventionally, as a paper cutter of this type
A paper cutter disclosed by Japanese Patent No. 96 is known.

In these conventional techniques, as shown in FIG. 4, a tool rest 3 rotatably supporting a round blade 1 is linearly guided by a tool rest guide 4. On the other hand, the linear receiving blade 2
Is provided in parallel to the tool rest guide 4, and the round blade 1 is pivotally supported so that its side surface is in contact with the edge line of the receiving blade 2 with a slight inclination. At the cutting point A at the lower left of the center of the cutting edge, the cutting edge is pressed against the cutting edge of the receiving blade 2 to cut between the cutting point A and the cutting edge of the receiving blade 2.

Further, the tool rest 3 is moved linearly along the tool rest guide 4 by the drive device, and the round blade 1 is rotated by the rotating device by the meshing of the rack and the gear in accordance with the movement of the tool rest 3. It has become. The direction of rotation is given to the left when the tool rest 3 travels to the left, and to the right when it travels to the right.

Therefore, in such a conventional paper cutter, the paper cutting by the round blade 1 and the receiving blade 2 is configured to be performed at the cutting edge end A, so that the paper cutting process of the paper cutter is performed by the tool rest 3. Traveling only to the left, and traveling to the right is the return stroke of the tool rest 3 to the paper cutting start position, and one paper cut is performed every two strokes of the tool rest 3 in the left and right directions. It is done.

[Problems to be solved by the device]

However, in this type of conventional paper cutter, in order to surely cut the sheet in each cutting process and to cut the cut well, the round blade 1 is tilted with respect to the tip line of the receiving blade 2 and is rotated. While the blade 1 is rotated in the same direction as the traveling direction of the turret cutting process, the cutting blade portion A of the round blade 1 and the cutting edge of the receiving blade 2 cut the sheet, so that the round blade 1 is cut. It is necessary to rotate in the same direction as the traveling direction of the cutting stroke of No. 3, and in the conventional device in which the round blade 1 is tilted and rotatably supported with respect to the cutting edge line of the receiving blade 2, a rotating device by meshing a rack and a gear is used. Depending on the situation, it was difficult to give the round blade uniform rotation.

In addition, in the conventional Baker cutter having only one round blade 1, the number of blades pivotally supported by the tool rest 3 is one.
Since it is an individual piece, cutting is not performed in the return stroke, and the traveling stroke of the tool post 3 for cutting the paper once is 1 in the left-right direction.
It was necessary to reciprocate, and it was difficult to meet the demand for shortening the paper cutting time corresponding to the increase in the transmission speed of the facsimile transmission device and the like.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a paper cutter that can be cut for each of the left and right traveling strokes of a tool post for cutting paper with a simple configuration.

[Means for Solving the Problems]

In order to achieve the above object, the present invention moves a tool rest in which a rotary blade is rotatably supported along a straight tool post guide so that the cutting edge of the rotary blade is parallel to the tool post guide. In a paper cutter that cuts the paper or the like sandwiched between the rotary blade and the receiving blade by rotating while pressing against the blade edge of the receiving blade, the pair of rotary blades is tilted in opposite directions on the tool post. It is characterized by using one of a pair of rotary blades as a cutting blade depending on the moving direction of the tool rest, and is fixed coaxially with the pair of rotary blades pivotally supported by the tool rest. The pulley is characterized in that one wire, both ends of which are fixed to both ends of the tool post guide, is wound, and the rotary blade is rotated in that direction according to the moving direction of the tool post.

[Action]

Next, the operation of the present invention will be described. When the turret is moved in the left-right direction along the turret guide, for example, when the turret is moved to the left, the left rotary blade is coaxial with the turret. Since the wire is wound around the pulley fixed to the blade, it rotates counterclockwise, and at the cutting portion (point A) below the center of the rotary blade pressed against the blade edge of the blade, the rotary blade and blade are Cut the paper that is sandwiched between them. At this time, the succeeding rotary blade on the right side runs through the slit portion of the sheet cut by the preceding rotary blade on the left side without causing any trouble.

On the other hand, when the tool rest is moved to the right, the rotary blade on the right side rotates to the right, and the cutting portion (point A ') below the center of the rotary blade pressed against the blade edge of the receiving blade. Cut the paper with.

Therefore, the paper is cut in each traveling stroke in which the turret moves in the left-right direction along the turret guide,
The cutting time of paper is shortened.

〔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 an embodiment of the present invention. In the figure, parts that are the same as or equivalent to those of the conventional example shown in FIG.

The feature of this embodiment is that a pair of rotary round blades 1, 1a are pivoted on the tool post 3.
8 and 8a are attached to each other in a direction in which they expand and spread, and the rotary round blades 1 and 1a are axially supported while being slightly inclined in opposite directions.

A slide rail 4a of a tool rest guide 4 provided in a straight line on the tool rest 3 is slidably fitted, and a pulling wire 5 driven by a driving device (not shown) is provided at both ends of the tool rest 3. They are connected in a loop, and this drive unit pulls and moves the tool rest 3 in the left-right direction at a constant speed.

Further, pulleys 7 and 7a are coaxially fixed to the support shafts 8 and 8a of the rotary round blades 1 and 1a, respectively, and the wires 6 fixed to both ends of the tool post guide 4 are fixed to the pulleys 7 and 7a. Are suspended in a state of being wound at least once around the entire circumference.

On the other hand, the receiving blade 2 fixed to the receiving base 2a with respect to the rotary round blades 1, 1a is installed parallel to the tool post guide 4, and the rotary round blades 1, 1a and points A and A'respectively. Is pressed in.

Next, the operation of the present embodiment will be described. When the tool rest 3 is moved in the direction of arrow A or B by a driving device (not shown) via the pulling wire 5, the wires fixed to both ends of the tool rest guide 4 are shown. Since 6 is wound around the pulleys 7, 7a of the rotary circular blades 1, 1a with a predetermined tension, the pulleys 7, 7a rotate left or right at a constant rotation speed. At the same time, the rotary round blades 1 and 1a coaxially fixed to these pulleys 7 and 7a also rotate respectively.

As a result, when the tool rest 3 moves in the direction of the arrow A, the sheet (not shown) fed along the receiving blade 2 is a cutting portion where the rotary round blade 1 and the receiving blade 2 are pressed against each other and rotate counterclockwise. When the tool rest 3 is cut at A, and the tool rest 3 moves in the direction of arrow B, it is cut at the cutting portion A ′ where the rotating circular blade 1a rotating clockwise and the receiving blade 2 are pressed.

According to the present embodiment, when the tool rest 3 is moved along the tool rest guide 4 via the pulling wire 5 to the left or to the right, the wires 6 fixed to both ends of the tool rest guide 4 are moved. Since the pulleys 7 and 7a are wound around the outer peripheries of the pulleys 7 and 7a without slack, the pulleys 7 and 7a are rotated in the same direction as the running direction of the tool rest 3. For that purpose pulleys 7 and 7a
The rotary circular blades 1 and 1a provided coaxially with the turret are rotated in the same direction as the traveling direction of the turret 3 as the turret 3 travels. When traveling, it cuts the paper at the cutting part (point A) in the lower left direction from the center of the left round blade 1 (cutting blade) whose leading edge is pressed against the blade edge of the receiving blade 2. As a result, good cutting of the cut surface is obtained, and the subsequent right round blade 1a travels through the slit portion of the sheet cut by the preceding left round blade 1 without causing any trouble.

On the other hand, when the tool rest 3 travels rightward (direction of arrow B), the cutting is performed at the cutting portion (point A ') on the lower right side from the center of the right round blade 1a (cutting blade). Good cutting of the cut surface is obtained, and similarly to the case of the A direction, the subsequent left round blade 1 runs through the slit portion of the cut paper or the like without causing any trouble.

Therefore, in the present embodiment, since the cutting blades perform the cutting for each traveling stroke of the tool rest 3 in the left and right directions, the paper cutting time can be shortened corresponding to the increase in the transmission speed of the facsimile transmission device or the like. It is possible to meet the demand for increasing the number of cutting processes.

When pulling and moving the tool rest 3 at a constant speed in the left-right direction, the receiving blades 2 fixed to the receiving blade base 2a are different from the rotating round blades 1 and 1a at points A, respectively. Since they are pressed at points A and A ', the rotary round blades 1,1a are rotated and cut only by the friction between the rotary round blades 1,1a and the receiving blade 2.

[Effect of device]

According to the above-mentioned present invention, a pair of rotary blades are tilted in opposite directions on the tool post to be pivotally supported, and wires are wound around pulleys provided coaxially with those rotary blades, respectively, which is suitable for cutting. The rotation speed of the rotary blade can be easily obtained, a good cutting surface can be obtained without generating paper dust, and paper etc. can be cut for each traveling path of the tool post in the left and right directions, and it can be used for facsimile etc. The paper cutting time can be shortened corresponding to the speeding up of the electric power feeding speed in the electric power feeding device, and the demand for the increased number of cutting processes can be met.

In addition, as a result of being able to cut each traveling stroke, idle traveling is reduced and the useful life of the rotary blade can be further extended.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment according to the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a side view thereof, and FIG. 4 is a front view of a conventional example. 1,1a ... Rotating blade, 2 ... Receiving blade, 3 ... Turret, 4 ... Turret guide, 5 ... Truck wire, 6 ... Wire, 7,7a ...
…pulley.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliographic references Sho 56-116190 (JP, U)

Claims (3)

[Scope of utility model registration request] 1. A receiving blade having a rotary blade rotatably supported by a tool rest moved along a linear tool post guide so that a cutting edge of the rotary blade is provided in parallel with the tool post guide. In a paper cutter that cuts the paper and the like held between the rotary blade and the receiving blade by rotating while pressing against the blade edge of
A paper cutter, wherein a pair of rotary blades are tilted in opposite directions on the tool rest and are pivotally supported, and one of the pair of rotary blades is a cutting blade depending on the moving direction of the tool rest. 2. The paper cutter according to claim 1, wherein the shafts of the pair of rotary blades are supported so as to be inclined with respect to each other in a direction of expanding and expanding each other. 3. A pair of rotary blades pivotally supported by a tool rest, and a pulley fixed coaxially with the pair of wires, each wire having both ends fixed to both ends of a tool rest guide. The paper cutter according to claim 1 or 2.