JP3066684U - Recording paper cutting mechanism and facsimile apparatus having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording paper cutting mechanism and a facsimile apparatus provided with the same, using a single drive motor without using a one-way clutch or the like, for cutting off the recording paper conveyance and the like. It is possible to switch the drive transmission to the cutter operation, thereby reducing the cost, and preventing the cutter from inadvertently rotating when the drive is switched. SOLUTION: A friction gear 16 of a drive gear group includes:
It moves in accordance with the direction of rotation of the drive motor 11 to switch the gear train for the transport operation and to turn on / off the drive transmission to the cutter gear 32. When the rotation direction of the drive motor 11 returns to the original position at the end of the cutter operation, the knob 47 of the switch 46 contacts the cam surface 45 and functions as a stopper, thereby preventing the cutter from rotating in the reverse direction.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a recording paper cutting mechanism provided in a facsimile apparatus or the like, and more particularly to a technique for operating a recording paper cutting mechanism by switching a driving gear using one driving motor as a driving source.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, in a recording paper cutting mechanism applied to a facsimile machine or the like, which cuts a recording paper in a roll form, the recording paper after the image recording is separated from a driving motor for conveying the recording paper. A motor using a motor for performing a cutting operation (cutter operation) was generally used, but in this case, a plurality of motors were required, so the cost was high. Therefore, in order to reduce the cost, there is an apparatus in which the drive transmission is switched by one motor (for example, see Japanese Patent Application Laid-Open No. 4-146098).

[0003]

[Problems to be solved by the invention]

 However, in the recording paper cutting mechanism as disclosed in the above publication, a one-way latch is used so that the cutting device operates in accordance with the switching of the rotation direction of the drive motor, which increases the cost. . In addition, when the one-way clutch is not used, there is a problem that the cutter is inadvertently operated in the reverse direction at the time of switching the drive, which causes a problem.

The present invention has been made to solve the above-described problems, and uses a single drive motor without using a one-way clutch or the like to convey recording paper and the like and to record paper. The drive transmission can be switched to the cutter operation for cutting, the cost can be reduced, and the recording paper cutting mechanism and the recording paper cutting mechanism that prevent the cutter from inadvertently rotating when switching the drive are provided. The purpose is to provide a facsimile machine.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the invention according to claim 1 is provided in a facsimile machine or the like, and a recording paper cutting mechanism for cutting a roll-shaped recording paper after image recording by rotating a cutter. One drive motor that serves as a drive source for recording paper transport or an image recording or reading operation (hereinafter referred to as a transport operation) and a cutter operation drive source, and moves in accordance with the rotation direction of the drive motor. Then, the gear train for the transport operation is switched, and a drive gear group having an intermediate gear for turning on / off the drive transmission to the cutter gear train for driving the cutter, and detecting that one cutter operation has been completed. Cutter operation detecting means for controlling the driving of the drive motor, and an intermediate gear of the drive gear group during the transfer operation for performing the cutter operation. When the rotation direction of the drive motor is reversed, the drive motor moves so that the drive to the cutter gear row is performed, and the control means controls the drive motor based on the cutter operation end detection by the cutter operation detection means. After stopping, when the rotation direction of the drive motor is returned to the original direction, the drive motor moves so as to cut off the drive to the cutter gear train.

In the above configuration, the intermediate gears of the drive gear group move in accordance with the rotation direction of the drive motor to switch the gear train for the transport operation and to turn on / off the drive transmission to the cutter gear train. I do. The intermediate gear moves so as to drive the cutter gear train when the rotation direction of the drive motor during the transport operation is reversed to perform the cutter operation. The drive motor is stopped based on the detection of the end of the cutter operation, and thereafter, when the rotation direction of the drive motor is restored, the intermediate gear moves so as to cut off the drive to the cutter gear train. In this manner, the cutter operation can be performed by switching the rotation direction with one drive motor, and when the rotation direction of the drive motor returns to the original position at the end of the cutter operation, the cutter is inadvertently reversely rotated. Can be prevented.

According to a second aspect of the present invention, in the recording paper cutting mechanism according to the first aspect, the cutter operation detecting means includes a switch having a knob which is in contact with a cam surface provided on a cutter or a cutter gear, When the switch is turned off at the end of the cutter operation and the rotation direction of the drive motor returns to the original position, the cam surface is rotated in the reverse rotation direction of the cutter gear by the combination of the knob-shaped mounting position and the cam shape. It is designed to be a stopper for

In the above configuration, when the rotation direction of the drive motor returns to the original position at the end of the cutter operation, the cutter is inadvertently rotated reversely for a short time until the intermediate gear disengages from the cutter gear train. If this is the case, the switch knob contacts the cam surface and functions as a stopper, preventing the cutter from rotating in the reverse direction. Also, even when the intermediate gear is disengaged from the cutter gear train and the cutter gear train is free, it is possible to prevent the cutter from rotating carelessly.

According to a third aspect of the present invention, there is provided the recording paper cutting mechanism according to the first or second aspect, further comprising an urging means for holding the intermediate gear in a neutral state when the apparatus is on standby. In accordance with the operating state of (1), the biasing means is operated to release the neutral state of the intermediate gear, thereby allowing movement of the drive motor in accordance with the rotation direction.

In the above configuration, the on / off control of the biasing means and the rotation direction control of the drive motor can be used to switch the drive force of one drive motor to the drive of each part of the apparatus, and a simple configuration is achieved. Thus, the effect of the first or second aspect can be obtained.

According to a fourth aspect of the present invention, there is provided a facsimile apparatus including the recording paper cutting mechanism according to any one of the first to third aspects.

According to the above configuration, the cutter operation for cutting the recording paper in the facsimile operation does not become unstable due to the operations described in the first to third aspects.

[0013]

[Embodiment of the invention]

 Hereinafter, a facsimile apparatus having a recording paper cutting mechanism according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an external configuration of a facsimile machine. The facsimile apparatus 1 has a document supply port 2 at the back of the upper surface of the case, an operation unit 3 at the center of the upper surface of the case, a document discharge unit 4 at the near side, and a discharge unit 5 for recording paper after image recording at the front of the case. In the case, a roll-shaped recording paper storage unit (not shown) and its driving system, a recording head that performs image recording during reception and copying operation, and its driving system, and a reading unit that performs image reading during transmission and copying are provided in the case. It is equipped with a head, its drive system, and a roll-shaped recording paper cutting mechanism.

FIG. 2 shows a standby state of a drive gear group including a recording paper cutting mechanism in a facsimile apparatus. FIGS. 3 to 7 show, respectively, a copying operation, a receiving operation, a transmitting operation, and a cutter operation (motor reverse rotation). ) Shows the state of the gear train at the end of the cutter operation (forward rotation of the motor). FIG. 8 shows the operation of the cutter gear and the switch in the recording paper cutting mechanism, and FIG. 9 shows the cutter operation of the recording paper cutting mechanism.

In these figures, a drive gear group including a recording paper cutting mechanism and a drive motor 11 are provided on a chassis side plate 10 in a case. An output gear 13 fixed to an output shaft 12 of the drive motor 11 meshes with a large-diameter gear 14, and is a planetary gear that is movable around the gear 14 and a small-diameter gear 15 in accordance with the rotational driving direction of the motor. Gears 16, 17 (intermediate gears) acting as a shaft are rotatably supported by rotating levers 18, 19. Locking levers 21 and 22 actuated by plungers (biasing means) 20 are provided so as to be able to abut against the rotating levers 18 and 19, so that movement of the friction gears 16 and 17 can be restricted. I have. The locking levers 21 and 22 are urged clockwise in FIG.

Further, a gear 24 forming a drive gear train (for carrying operation) for conveying the recording paper or feeding the original and driving the original reading head, a gear 25 integral with the gear, a gear 26 and a gear 27 meshing with the gear 25. Is provided. In the gear 24, the regulation by the locking lever 21 is released, and the friction gear 16 (indicated by 16a) moved by the forward rotation (CW) of the motor or the friction gear 17 moved by the reverse rotation (CCW) of the motor (17b) ) Are interlocked. Further, a gear 29 forming a drive gear train for driving a recording head for performing image recording and a driving gear 30 for recording are provided integrally with the gear 29, and the gear 29 is moved by forward rotation (CW) of the motor. The friction gear 17 meshes.

Further, a gear 31 constituting a gear train of the recording paper cutting mechanism and a cutter gear 32 meshing with the gear 31 are provided, and the gear 31 is released from the restriction by the locking lever 21 and is provided with a motor reverse rotation (CCW). ) Mesh with the friction gear 16 (indicated by 16b). The cutter device 40 of the recording paper cutting mechanism includes a rotary blade 41 and a fixed blade 42. The rotary blade 41 is rotatably provided around a shaft 43, and the other end of a connecting lever 44 having one end connected to the cutter gear 32 is connected to an arm 41a (see FIG. 9) of the rotary blade 41. The recording paper is cut between the fixed blade 42 and the recording paper by being driven to rotate in conjunction with the rotation of the cutter gear 32.

A cam surface 45 is provided integrally with the cutter gear 32, and a knob 47 as an actuator of a switch 46 constituting cutter operation detecting means is in contact with the cam surface 45. Although not shown, a control circuit (control means) for controlling the driving of the drive motor 11 by inputting a switch 46 and other signals is provided. As shown in FIG. 8, the cutter operation is started when the drive motor 11 switches from normal rotation to reverse rotation so that the friction gear 16 meshes with the gear 31. One cutter operation ends when the cutter gear 32 makes one rotation. When the operation of the cutter is completed, the driving motor 11 is returned to its original direction (normal rotation) in order to disengage the friction gear 16 from the gear 31. Thus, the drive transmission to the cutter gear 32 is turned off.

The cam surface 45 is formed in a convex portion where the switch 46 is turned on during the cutter operation, and is formed in a concave portion which is turned off when the cutter operation is completed. When the knob 47 is fitted into the concave portion by the end of the cutter operation, the knob 47 bites into a wedge shape in the reverse rotation direction of the cutter gear 32, and functions as a stopper. As a result, the friction gear 16 inadvertently rotates the cutter gear 32 via the gear 31 in a direction opposite to the original rotation, a short time immediately before the engagement of the friction gear 16 with the gear 31 is released. It is prevented.

Here, with reference to FIG. 3 to FIG. 7, how the drive gear train is switched in each operation state of the apparatus will be described. The friction gears 16 and 17 move in accordance with the rotation direction of the drive motor 11 and in accordance with the on / off state of the plunger 20 to switch the transport operation gear train and switch on / off the drive transmission to the cutter gear train. Do. FIG. 3 shows a state at the time of copying, and the rotation direction of each gear is indicated by an arrow. 2, the drive motor 11 is driven forward (CW), and the plunger 20 is turned on. As a result, the lever 21 is rotated as shown in the drawing against the bias of the spring 23, the engagement of the friction gear 16 by the lever 21 is released, and the friction gears 16 (16a) and 17 29 mesh with each other.

FIG. 4 shows a state at the time of reception. 2, the drive motor 11 is driven forward (CW) and the plunger 20 is turned off. As a result, the friction gear 17 meshes with the gear 29, and the drive is transmitted to the recording drive gear 30.

FIG. 5 shows a state at the time of transmission. From the standby state of FIG. 2, the drive motor 11 is driven in reverse (CCW) and the plunger 20 is turned off. As a result, the friction gear 17 (17b) meshes with the gear 28 interposed at the time of reverse rotation, whereby the drive is transmitted to the gear 24. The rotation direction is the same as the copy state in FIG.

FIG. 6 shows a cutter operation (motor reverse rotation) state, and FIG. 7 shows a cutter operation end (motor forward rotation) state. The cutter operation state is shifted from the copy operation state in FIG. 3 or the reception state in FIG. The drive motor 11 is switched to reverse rotation (CCW), and the plunger 20 is turned on. As a result, the friction gear 16 (16b) meshes with the gear 31, whereby the drive is transmitted to the cutter gear 32 (at this time, the cutter rotates forward). The other friction gear 17 is prevented from moving by the rotation lever 19 abutting on the locking lever 22, and does not mesh with the gear 28.

When the end of the cutter operation is detected by the switch 46, the drive motor 11 is switched to forward rotation (CW) and the plunger 20 is turned off in order to release the engagement of the friction gear 16 (16b) with the gear 31. You. At this time, as shown in FIG. 7, the cutter gear 32 is rotationally driven in a direction opposite to that in FIG. 6 (cutter reverse rotation) for a moment immediately before the gear disengages. However, in the present embodiment, as shown in FIG. 8, the knob 47 of the switch 46 fits into the concave portion of the cam surface 45 upon completion of the cutter operation, and functions as a stopper in the reverse rotation direction of the cutter gear 32. This prevents the rotating blade 41 of the cutter from rotating inadvertently.

Further, even when the apparatus is in the standby state, the knob 47 of the switch 46 is fitted into the concave portion of the cam surface 45, so that the rotary blade 41 of the cutter may be inadvertently rotated by vibration or the like. Can be prevented.

The present invention is not limited to the configuration of the above-described embodiment, and various modifications are possible. For example, in the above-described embodiment, the one in which the cutter operation and the conveyance of the recording paper, the copy operation, the reception operation, and the transmission operation are performed by using one drive motor 11 as a drive source has been described. May be combined with at least one or more operations.

[0027]

[Effect of the invention]

 As described above, according to the invention of claim 1, at least the operation of transporting the recording paper and the cutter operation for cutting the recording paper using one drive motor without using a one-way clutch or the like. The drive transmission can be switched quickly, cost reduction can be achieved, and the cutter can be prevented from inadvertently rotating when switching the drive, and the operation does not become unstable when the drive transmission is switched .

According to the second aspect of the present invention, when the rotation direction of the drive motor returns to the original position at the end of the cutter operation, the knob of the switch comes into contact with the cam surface and functions as a stopper. Reverse rotation can be prevented. Also, even when the cutter gear train is in a free state, it is possible to prevent the cutter from rotating carelessly.

According to the third aspect of the present invention, the effect of the first or second aspect is achieved with a simple configuration by controlling on / off of the biasing means and controlling the rotation direction of the drive motor. Obtainable.

Further, according to the present invention, when a facsimile operation is performed using one drive motor as a drive source, it is possible to prevent the cutter operation for cutting the recording paper from becoming unstable.

[Brief description of the drawings]

FIG. 1 is an external configuration diagram of a facsimile apparatus according to an embodiment of the present invention.

FIG. 2 is a side view showing a standby state of a drive gear group including a recording paper cutting mechanism in the facsimile apparatus.

FIG. 3 is a diagram showing a state of the drive gear group at the time of copying of the apparatus.

FIG. 4 is a diagram showing a state of the drive gear group at the time of reception by the device.

FIG. 5 is a diagram showing a state of the drive gear group at the time of transmission of the device.

FIG. 6 is a diagram showing a state of the drive gear group during a cutter operation.

FIG. 7 is a diagram showing a state of the drive gear group at the end of a cutter operation.

FIG. 8 is a diagram showing operations of a cutter gear and a switch in the recording paper cutting mechanism.

FIG. 9 is a diagram showing a cutter operation of a recording paper cutting mechanism.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 Drive motor 13,14,15 Gear 16,17 Frixon gear (intermediate gear) 20 Plunger (biasing means) 21,22 Locking lever 24,25,26,27,28,29,30,31 Gear 32 Cutter Gear 40 Cutter device 41 Rotary blade 42 Fixed blade 45 Cam surface 46 Switch 47 Knob

Claims (4)

[Utility model registration claims] 1. A recording paper cutting mechanism provided in a facsimile machine or the like, which cuts a roll-shaped recording paper after image recording by rotating a cutter. , A driving motor serving as a driving source for the transporting operation) and a driving source serving as a driving source for the cutter operation, and moving in accordance with the rotation direction of the driving motor to switch a gear train for the transporting operation. A drive gear group having an intermediate gear for turning on and off the drive transmission to a cutter gear train for driving the cutter; a cutter operation detecting means for detecting completion of one cutter operation; and controlling the drive of the drive motor. And an intermediate gear of the drive gear group, in order to perform a cutter operation, reverses a rotation direction of the drive motor during a transport operation. The cutter gear train moves so as to enter, and after the control means stops the drive motor based on the cutter operation end detection by the cutter operation detection means, the rotation direction of the drive motor The recording paper cutting mechanism moves so as to cut off the drive to the cutter gear train when returning to the original position. 2. The cutter operation detecting means comprises a switch having a knob in contact with a cam surface provided on a cutter or a cutter gear. The switch turns off at the end of the cutter operation, and the rotation of the drive motor is stopped. 2. The recording paper cutting device according to claim 1, wherein when the direction returns to the original position, the knob shape serves as a stopper in the reverse rotation direction of the cutter gear by a combination of the mounting position and the cam shape. mechanism. 3. An urging means for holding the intermediate gear in a neutral state when the apparatus is in a standby state, wherein the urging means is operated according to an operation state of the apparatus to release the neutral state of the intermediate gear. 3. The recording paper cutting mechanism according to claim 1, wherein movement of the driving motor in accordance with the rotation direction is permitted. 4. A facsimile apparatus comprising the recording paper cutting mechanism according to claim 1.