JPH0616700Y2 - Cutter drive mechanism for facsimile - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a cutter driving mechanism in a facsimile.

[Prior Art] As shown in FIG. 3, a receiving section (50) of a facsimile machine has a roll-shaped recording paper (P) with one end thereof pulled out and a print head (5).
The image information received and guided to 1) is printed on the recording paper (P) by the print head (51). The recording paper (P) is normally pressed against the print head (51) by the platen roller (52), and while being received, the recording paper (P) is gradually fed by the rotation of the platen roller (52) in the clockwise direction (in the drawing) and runs.

The printed recording paper (P) is guided to the cutter device (53), and is cut by the operation of the cutter device (53) after completion of reception and discharged outside the machine.

The cutter device (53) is composed of a movable blade (54) and a fixed blade (55), and when the recording is completed, the movable blade (54) is rotated counterclockwise by the action of the drive motor of the cutter device (see the drawing). The recording paper (P) is rotated by a predetermined angle (dashed line (54a)), and the recording paper (P) is sandwiched between the fixed blade (55) and cut.

[Problems to be solved by the invention]

However, in the cutter device (53) described above, the movable blade
When the recording paper (P) is cut by the rotation of (54), a cutting reaction force from the recording paper (P) is generated against the external force of the movable blade (54). When the cutter device (5
Since a large load is applied to the drive motor of 3), a strong torque (rotational force) is required for the motor. Further, with the recent miniaturization and labor saving of the facsimile machine, when a small motor is used, depending on the quality of the recording paper (for example, thick or stiff paper), the capacity of the motor exceeds that of the motor at the time of cutting. Since a load may be applied, it may cause a failure of the motor, and there is a problem that a recording paper cutting error may occur.

The present invention has been made in consideration of the above circumstances.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention is a cutter device comprising a fixed blade and a movable blade that automatically cuts continuous recording paper after receiving it. Both ends of the fixed blade are attached to the side wall of the frame of the cutter device. The movable blade is rotatably supported on the frame side wall by rotating shafts provided at both ends of the movable blade. An urging member is provided on one side of the rotating shaft to attach the movable blade in the cutting direction. It was something that was made to move.

[Action]

When the movable blade of the cutter device is operated by the drive motor, the urging force of the urging member serves to assist the drive force of the drive motor.

〔Example〕

A preferred embodiment of a cutter driving mechanism in a facsimile of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of an essential part showing a drive mechanism of a receiving section of a facsimile apparatus, which will be described below in brief.

(P) is a continuous recording paper wound in a roll, and (1) is a print head for printing an image received on the recording paper, which is supported by a support bracket (not shown). (2) is a platen roller that slides the recording paper (P) on the surface of the print head (1). Further, (3) is a cutter device for cutting the recording paper (P) that has finished recording, (4) is a movable blade, and (5) is a fixed blade.

Both ends of the fixed blade (5) are frame side walls of the cutter device (3).
The movable blade (4) is attached to (26a) and (26b), and both ends of the movable blade (4) are rotatably supported on the frame side walls (26a) and (26b) by rotating shafts (27) and (27). The leading end of the roll-shaped recording paper (P) is guided to the outside of the machine through between the print head (1) and the platen roller (2) and between the two blades (4) and (5). The recording paper (P) is fed little by little by rotating the platen roller (2) in the clockwise direction (in the drawing), and the print head (1) sequentially records on the feeding recording paper (P). To do. When recording is completed, the recording paper (P) is sandwiched between the fixed blade (5) and cut by the reciprocating movement of the other shaft (29) provided at one end of the movable blade (4) in the cutting direction. .

Next, the drive mechanism of the above-mentioned facsimile receiver will be described. The drive mechanism comprises a platen roller drive mechanism (6) and a cutter drive mechanism (7).

In the platen roller drive mechanism (6), (M1) is the recording paper (P)
The first motor for feeding, the driving force is transmitted from the gear (8) fixed to the drive shaft of the motor (M1) to the gears (9) and (10) provided on the other shaft, and further to the Gabelto (11 ) Through platen roller
It is transmitted to the gear (12) fixed to the shaft of (2). Therefore, when the drive shaft of the first motor (M1) rotates counterclockwise (in the drawing), the platen roller (2) rotates clockwise,
Feed the recording paper (P) to the right (recording paper feeding direction).

In the cutter drive mechanism (7), (M2) is a second motor for driving the cutter device (3). The drive shaft (13) of the motor (M2) has two gears (14) (21) as shown in FIG.
Is provided so that it can also be used for feeding the original on the facsimile transmission side.One gear (14) is fixed to the drive shaft (13) and the other gear (21) is unidirectional. clutch
(22) is provided so that the driving force is transmitted to the gear (21) only when the drive shaft of the motor (M2) rotates in the clockwise direction (in FIG. 1). One gear (14) has a gear (15) (16) provided on another shaft and a gear provided on the other shaft.
Motor (M2) through (17) (18) and Gabelt (19)
Driving force is transmitted to the facsimile transmission side, but the description is omitted here.

The gear (21) provided on the shaft of the second motor (M2) has another shaft
The gear (24) provided in (23) is meshed. An arm (25) is connected to a part of the gear (24), and the other end of the arm (25) is swung by a rotary shaft (27) on a side wall (26a) of a frame (26) of a cutter device (3). It is connected to a freely supported plate (28),
A support end of the movable blade (4) is fixed to the rotary shaft (27), and the other end of the movable blade (4) is fixed to another shaft (29) fixed to the plate (28).

The rotation shaft (27), frame side wall (26a) and plate (28)
Between them, the biasing member (3
1) is provided and one end (32) of the biasing member (31) is in contact with the frame side wall (26a) and the other end (33) is in contact with the plate (28) side. Since the frame (26) of () is fixedly fixed to the side wall (35) of the facsimile machine, the “twisting force” of the biasing member (31) acts on the plate (28).
(28) is pushed down, that is, the movable blade (4) serves as "urging force" when cutting the recording paper (P). When the second motor (M2) rotates clockwise (in Fig. 1),
(24) rotates in the counterclockwise direction, the arm (25) cranks, and the movable blade (4) reciprocates around the rotation axis (27) as a fulcrum to cut the recording paper (P). When the second motor (M2) rotates counterclockwise, the gear (2
The driving force is not transmitted to 4) and the cutter device (3) does not operate. The first motor (M1), the second motor (M2), the shaft of the gear, etc. are supported by the side wall (35) of the facsimile machine.

A circular plate (37) having a convex portion (36) is fixed to the gear (24), and a stopper (38) attached to the side wall (35) of the facsimile machine contacts the convex portion (36). The contact prevents the reverse rotation (right rotation in the drawing) of the gear (24) in the operation standby state of the cutter device (3). Further, in this state, the urging force of the urging member (31) acts to push down the arm (25) via the plate (28), so that the facsimile machine may not be affected by vibrations during reception or transmission. It is possible to prevent a so-called "slip phenomenon" in which the gear (24) easily rotates counterclockwise. The rotational force of the second motor (M2) and the urging force of the urging member (31) have a relationship of rotational force> urging force.

By the way, in the present embodiment, the pressing member (40) that abuts the one-way clutch (22) provided on the drive shaft of the second motor (M2).
The pressing member (40) comprises an inverted L-shaped leaf spring, and a screw hole (41) formed in the upper end of the pressing member (40) is attached to a side wall ( It is fixed to 35). By pressing and urging the one-way clutch (22) in the axial direction by the pressing member (40), it is possible to prevent noise and vibration when the second motor (M2) is driven.

Next, the operation of the present invention will be described.

In response to a recording start command from the reception controller (not shown) of the facsimile body, the first motor (M1) rotates counterclockwise (in Fig. 1).
Drives from ga (8) to ga (9) (10) and gabel (11)
The recording paper (P) is fed little by little by being transmitted to the gear (12) via the platen roller (2) in the clockwise direction, and the print head (1) is fed by the recording head (1). Sequential recording on P). The leading edge of the roll-shaped recording paper (P) is the print head (1)
And the platen roller (2) and between the cutters (4) and (5) are guided to the outside of the machine. At the time when the recording is completed, after the several seconds required for the rear end of the recorded portion of the recording paper (P) to pass from the print head (1) to the cutters (4) and (5), the first
The drive of the motor (M1) is stopped and the rotation of the platen roller (2) is stopped.

Next, in response to a recording paper cutting command from the reception control unit, the drive of the right rotation (in FIG. 1) of the second motor (M2) is transmitted from the gear (21) to the gear (24), and the gear (24) is driven. The arm (25) cranks by one rotation in the counterclockwise direction and is transmitted to the plate (28) connected to the other end of the arm (25).
The movable blade (4) fixed to the shaft (29) of (28) is the rotary shaft (27).
The recording paper (P) is cut by sandwiching it between the fixed blade (5) and the reciprocating rotation with the fulcrum as the fulcrum. At this time, since the operation of the movable blade (4) is biased by the biasing member (31), it is possible to reduce the load applied to the motor, for example, when using a small motor, or in the present embodiment. As described above, even when the cutter driving mechanism (7) is also used for feeding the original on the facsimile transmission side, or when cutting thick recording paper, the cutting can be performed reliably and easily. It is possible to prevent mistakes and prevent motor failures.

In this embodiment, a torsion spring is used as the urging member (31) to urge the movable blade (4) in the cutting direction by inserting it into the shaft (27). (2
8) A pressing member such as a coil spring is provided on the plate
The movable blade (4) may be urged in the cutting direction by pressing or pulling (28).

[Effect of device]

As described in detail above, according to the present invention, the operation of the movable blade of the cutter device can be biased by the biasing member,
Since this urging force assists the driving force of the driving means such as the motor, the recording paper can be reliably and easily cut even if the driving force is slightly small.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part showing a driving mechanism of a receiving section of a facsimile apparatus according to the present invention, FIG. 2 is a plan view showing a part of a cutter driving mechanism, and FIG. 3 is a receiving section of a conventional facsimile apparatus. It is a schematic longitudinal side view shown. (3) …… Cutter device, (4) …… Moveable blade (5) …… Fixed blade, (26a) (26b) …… Frame side wall (27) …… Rotary axis, (P) …… Continuous recording paper ( 31) ... Biasing member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-61-230826 (JP, A) Actually developed S61-205791 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A cutter device comprising a fixed blade and a movable blade for automatically cutting a continuous recording paper after recording, wherein both ends of the fixed blade are attached to a side wall of a frame of the cutter device. Is rotatably supported on the side wall of the frame by rotating shafts provided at both ends thereof and can be driven to rotate by a driving means. An urging member is provided on the rotating shaft to urge the movable blade in the cutting direction. A cutter drive mechanism in a facsimile machine, characterized in that the recording paper is cut in a state where the urging force of the urging member is applied to the drive force of the drive means.