JPS6336710B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transceiver-type facsimile device that is equipped with a document reading section and a received image recording section, and in which the received image recording section is configured as a unit and can be drawn out from the device. .

Conventionally, in facsimile devices, the document reading section and the received image recording section are placed side by side, and maintenance such as replacing the roll recording paper is performed by opening a part of the device, but generally the position occupied by the roll recording paper is Moreover, since the transport system is located inside the device, its handling becomes extremely complicated. Therefore, it has already been proposed that the received image recording section is made into a unit and can be pulled out. In this case, a cutter for cutting the roll of recording paper is provided in the received image recording section, and this cutter may be operated by reversing the conveyance roll. At this time, if this conveyance roller is made to be freely reversible in order to set the roll recording paper, the operator may accidentally reverse the conveyance roller and operate the cutter when setting the roll recording paper, which could be dangerous. However, it requires a breaking means such as an electromagnetic clutch.

The present invention has been made in view of these points, and it is an object of the present invention to provide a facsimile device that can ensure safety without having to operate the cutter when replacing roll recording paper, etc., and that does not interfere with operation when stored. The purpose is to

The present invention has a cutter that cuts the roll recording paper by reversing the conveyance roller, but when the received image recording unit is pulled out of the apparatus and the roll recording paper is replaced, the reversal prevention mechanism prevents the conveyance roller from reversing. The cutter is locked to prevent the cutter from operating, thereby ensuring safety without using an electromagnetic clutch, and is configured so that it can be operated when stored inside the device.

An embodiment of the present invention will be described based on the drawings. First, FIG. 1 schematically shows a facsimile apparatus, in which a document reading section 1 and a received image recording section 2 are arranged in two stages, upper and lower. This document reading section 1 has a document mounting table 4 on which a plurality of documents 3 can be set.
is provided. A document separation and feeding mechanism is provided in front of the document placement table 4. That is,
When a document 3 is set in this mechanism, a drive source (not shown) rotates a paper feed roller 5 and a separation roller 6 to send the document 3 to the left, and a separation plate 7 is pressed against the separation roller 6. Therefore, even if two original documents 3 are sent in a stacked state, the upper original 3 is held down by the separation plate 7 and is separated from the lower one one by one and sent out. Further, a conveyance roller 8 is provided to convey the document 3 sent out from the separation roller 6 to a reading position. A light source 10 is provided that illuminates the document 3 passing over the target glass 9 at this reading position, and an image sensor 13 is provided whose reflected light is imaged by an optical system such as a mirror 11 and a condensing lens system 12. ing. Here, the image information read by the image sensor 13 is subjected to processing such as binarization and data compression before being sent to the receiving side. works. A discharge roller 15 is provided to discharge the document 3 that has passed the reading position toward the tray 14.

On the other hand, in the received image recording section 2, a roll recording paper 16 is set in a holder 17, and the roll recording paper 16 is pulled out via a guide roller 18 by a platen roller 19 serving as a conveyance roller.
After the received image information is recorded by the recording head 20 that is in opposing contact with the platen roller 19, the received image information is cut by the cutter 21, and the paper is transferred to the tray by the paper ejection roller 22.
It is configured to discharge onto 3. here,
The received image recording section 2 is made into a unit, with a rail 24 fixed at the bottom, and a bottom plate 25 of the facsimile machine.
It can be freely pulled out to the left in the figure along a guide rail 26 provided in the figure. This received image recording section 2
The drawer amount of the unit is such that the roll recording paper 16 can be taken out sufficiently from the holder 17.
At this pull-out position, a new roll of recording paper 16 is set in the holder 17. Then, pressing the received image recording unit 2 again completes the process and enables reception. Such operations are not limited to replacing the roll recording paper 16, but also apply to jam removal and maintenance of the cutter section and recording section. In addition, both trays 14 and 23 are removable,
It is configured so that it can be removed when moving or maintaining the recording paper.

A more specific configuration of this received image recording section 2 will be explained with reference to the drawings from FIG. 2 onwards.
First, between the platen roller 19 and the recording head 20, there is usually 2 to 3 kg of A4 size recording paper.
The pressure is applied by a spring to be described later, and the roll recording paper 16 is conveyed in accordance with the rotation of the platen roller 19. Here, this platen roller 19
In order to rotate the rotary shaft 27, a pulley 28 with a large diameter is fixed to one end of the rotating shaft 27. This pulley 28 is connected by a belt 29 to a pulley 31 fixed to the output shaft of a pulse motor 30, which is the only driving source and can freely rotate forward and backward. Therefore, the rotation of the pulse motor 30 is decelerated and transmitted to the platen roller 19, and in accordance with the rotation of the pulse motor 30, accurate conveyance of the recording paper, that is, sub-scan feeding is performed. For example, in the case of a thermal recording method, a thermal coloring paper is used as the roll recording paper 16, a thermal head in which heating elements are arranged intermittently with the necessary linear density is used as the recording head 20, and the roll recording paper Electronic scanning is performed in a direction perpendicular to the feeding direction (main scanning direction) 16, and after one line recording is completed, sub-scanning is performed by a platen roller 19 in accordance with the linear density.

Further, a pulley 32 is also fixed to the rotating shaft 27 of the platen roller 19, and is connected via a belt 33 to a pulley 35 fixed to the rotating shaft 34 of the upper roller 22A of the paper ejection roller 22. Here, the upper roller 22A is made of a metal material, and the lower roller 22B is made of a rubber material, and both are in pressure contact with each other.

The recording head 20 is mounted on a bracket 36.
The bracket 36 is supported by an arm portion 38 that is rotatable about the shaft 37 of the guide roller 18. This arm part 3
A spring 40 is provided between the platen roller 19 and the fixing pin 39 to ensure pressure contact between the platen roller 19 and the recording head 20. Further, at the bottom of the bracket 36, there is a PC board 4 for the recording head 20 driver.
1 is installed. Next, levers 43 are provided on both sides, which are rotatable about the rotating shaft 27 of the platen roller 19 and have a cam portion 42 on the lower side that can push down the bracket 36.
They are combined by a tight plate 44 to form a cover body 45. A shaft 46 is attached to the upper side of this lever 43. The cutter 21 is composed of a movable blade 21A and a fixed blade 21B,
A rotating shaft 49 rotatably supported by a holder 48
The movable blade 21A is supported by a support frame 50 to which the movable blade 21A is fixed. This support frame 50
A portion of one side is formed into a substantially U-shape, and a roller 5 is formed.
The cutter lever 52 to which the cutter lever 1 is attached is fixed and pulled clockwise by a spring 54 provided between it and a fixing pin 53.

Next, the holder 17 into which the roll recording paper 16 is set has a curved portion 55 at its bottom that is approximately similar in shape to the roll shape of the roll recording paper 16.
A friction member 5 is provided on one side continuous with this curved portion 55.
6 is affixed to it, and the roll recording paper 1 is fixed to the shaft 57 and exposed through a notch (not shown) on the other side.
A remaining amount detection plate 58 is provided to detect the remaining amount of the remaining amount by pressing down on the remaining amount. This pressing force of the remaining amount detection plate 58 is ensured by a torsion spring 60 against a lever 59 fixed to the shaft 57. Further, a hole is formed on the lower side of one side of the remaining amount detection plate 58, and a reflective sensor 61 is provided to detect the near-end mark of the roll recording paper 16 through this hole. Therefore, the roll recording paper 16 set in the holder 17 is always pushed to the right in the figure by the remaining amount detection plate 58, but normally the balance is maintained by the paper feed force acting to the left. . On the other hand, as will be described later, when the roll recording paper 16 is cut and the leading edge margin is pulled back, the paper feed force to the left does not act, and the roll recording paper 16 is pushed and moved to the right, and the sensor 61
erroneous signals may be generated due to To prevent this, the sensor 61 may be installed directly below the roll recording paper 16 or on the side where the roll recording paper 16 is pushed and moved, but this poses a space problem. However, according to this embodiment, the friction member 56 is attached to the surface facing the remaining amount detection plate 58, and the rolling of the roll recording paper 16 is prevented. Further, as the diameter of the roll recording paper 16 becomes smaller, the force for pressing the roll recording paper 16 increases, and even if the roll recording paper 16 becomes lighter, it can be stabilized. In any case, such a holder 17
This makes it possible to downsize the device and stabilize the roll recording paper 16.

The lever 59 is rotatably displaced as the remaining amount detection plate 58 detects the remaining amount, and the shaft 57
A lever 64 is provided which is formed in an arc shape with the center at the center and has an elongated hole 63 through which a pin 62 at the tip of the lever 59 passes. One end of this lever 64 is supported by the shaft 46 of the cover body 45. The tip of the lever 59 is bent to form a wire 65.
One end of is locked. The wire 65 is stretched while being guided by rollers 66 and is locked to a fixing pin 68 via a spring 67. Since this spring 67 is always weaker than the clockwise rotational force of the lever 59 provided by the torsion spring 60, it expands and contracts in accordance with the movement of the lever 59. Furthermore, the rollers 66A and 66B are arranged one above the other on the front side of the received image recording section 2. and,
A pointer 69 is fixed to the wire 65 and indicates the amount of movement of the wire 65 between the rollers 66A and 66B, that is, the remaining amount of the roll recording paper 16. This pointer 69 moves from bottom to top as the roll recording paper 16 becomes smaller in diameter between the rollers 66A and 66B, and displays the remaining amount on the front of the received image recording section 2. In this case, the uncertain part of the operation of the remaining amount display mechanism is also the pointer 6 located on the front side.
9 can be easily and reliably performed. That is,
The core tube of the roll recording paper 16 is set in the holder 17, and at this time, the pointer 69 is fixed to the wire 65 in alignment with the remaining amount zero scale on the front surface.

Incidentally, the roll recording paper 16 is set by opening the cover body 45. When the cover body 45 is opened, the remaining amount detection plate 58 and therefore the lever 59 are pulled by the lever 64 to open the inside of the holder 17, as shown in FIG. Since the bracket 36 and therefore the recording head 20 are separated from the platen roller 19 and the paper conveyance path is opened, the roll recording paper 16 can be moved to the holder 1 without being obstructed by the remaining amount detection plate 58.
7, it can be easily set to the guide roller 18 and platen roller 19 side.
When the cover body 45 is in the open state, the bracket 36
It is held by the pressure between the cam part 42 and the cam part 42. Then, by closing this cover body 45, the setting is completed.

Continuing, the rail 24 is connected to the unit side plate 70.
A bent portion 71 is formed on the side surface of the unit side plate 71 and spaced apart by approximately the length of the unit side plate 70, and a hanger 72 is fixed to the bent portion 71. Also,
A bracket 73 is fixed to the bottom plate 25 so as to be close to and parallel to the rail 24 and located on the front side of the facsimile machine, and a pin 74 is fixed to the upright piece of the bracket 73. A stopper 76 is provided in which a long hole 75 is formed so that the pin 74 can slide freely. The tip of this stopper 76 is the bent part 7 that the bending part 71 and the hanger 72 can abut.
7, and a rounded portion 76a is formed at the rear end. Incidentally, reference numeral 78 designates a leaf spring for grounding the received image recording section 2 unit, and is set so that it is fixed to the bottom plate 25 and comes into contact with the rail 24. Therefore, although FIGS. 4 and 5 show the stored state of the received image recording unit 2 unit, when the unit is pulled out forward, the hanger 72 engages with the bent portion 27 of the stopper 76 and moves as it is, resulting in a long Hole 75
moves until the right end touches the pin 74, and in this state the amount of withdrawal is regulated. Stopper 7 like this
6 moves a certain amount, the unit can be pulled out by a large amount, and the roll recording paper 16 can be easily replaced. Further, in order to completely pull out the unit, it is sufficient to raise the stopper 76 at an R-shaped portion 76a formed in a circular shape around the pin 74 in this state. Then, when the unit is pushed in, the bent portion 71 engages with the bent portion 77 and the stopper 76
It is stored in its original state while being moved.

Further, the rotary shaft 27 of the platen roller 19 is provided with a boss 80 having a cam 79 which is part of a cam clutch mechanism and a one-way clutch built therein. This one-way clutch does not transmit power when the rotary shaft 27 rotates clockwise, but transmits power when it rotates counterclockwise to the cam 79.
It rotates counterclockwise. here,
This cam 79 is connected to the roller 51 of the cutter lever 52.
In the normal state, the long diameter part 81 and the short diameter part 8 are in positional relationship as shown in FIG.
2 and a notch 83 in which the roller 51 is engaged. Further, a switch plate 84 that moves in conjunction with the cam 79 is provided, and a state switch 85 that is turned on and off by this switch plate 84 is provided. Therefore, the operation of cutting the roll recording paper 16 by the cutter 21 will be explained with reference to FIG. 9. First, at the end of recording, the recording end position is located directly below the platen roller 19, so the platen roller 19 continues to rotate normally and feeds the roll recording paper 16 by the length L ₁ between the platen roller 19 and the cutter 21. continue for a certain length
Send L ₂ . Here, this length L ₂ corresponds to the angle between the long diameter portion 81 and the notch 83 of the cam 79. Therefore, when the pulse motor 30 is reversed, the cam 79 is rotated counterclockwise along with the reverse rotation of the platen roller 19, and when the cam 79 is reversed by an extra fixed length L ₂ , the roller 51 is moved from the long diameter part 81 of the cam 79 to the short diameter part. 82, the movable blade 21A
rotates downward to cut the roll recording paper 16. Then, the cam 79 continues to rotate, and the roller 5
1 is pushed up according to the cam curve to form the notch 8.
3, the movable blade 21A returns and stops. At this time, the state switch 85 is changed from the ON state to the OFF state by the switch plate 84, and the pulse motor 30 stops after driving about 3 pulses after the state switch 85 is OFF. These three pulses are a margin for mechanical operation. Furthermore, even after cutting by the cutter 21, the pulse motor 30 is rotating in reverse during this period, so the leading edge margin of the roll recording paper 16 is pulled back by the length _L3 , which is slightly shorter than the length _L1 , by the platen roller 19, and the platen roller Since the pulse motor 30 stops a little ahead of the position directly below the roll recording paper 19, the roll recording paper 1
6 is pulled back and stopped.

Here, a leaf spring 86 for preventing the cam 79 from rotating quickly is in pressure contact with the boss 80. That is, since the boss 80 has a built-in one-way clutch, there is almost no resistance to the rotational force from the cam 79 side when rotating counterclockwise. When the cam 79 is about to fall into the diameter portion 82, it receives the force of the roller 51 and rotates quickly. Therefore, a pin 87 is provided on the boss 80 just before the short diameter part 82, and the pin 87 reaches the leaf spring 86 just before the roller 51 falls into the short diameter part 82 of the cam 79, increasing the resistance and minimizing fast rotation. It is something to suppress. In this case, since almost no fast rotation force is applied when the cam 79 rotates normally, it is only necessary to increase the resistance using the pin 87 when the roller 51 falls. In this way, leaf spring 8
6 and the pin 87 on the boss 80 constitute a brake mechanism, which is advantageous over the pulse motor 30 because its braking force is weak under normal conditions. Particularly, when a load is required such as in the reset stroke of the cutter 21, the pulse motor 30 is advantageous because the braking force becomes weaker. Furthermore, since the brake is not structurally based on frictional force, it is advantageous in terms of durability.

Further, this cam 79 is provided with a mechanism for preventing reverse rotation when the unit is pulled out from the facsimile apparatus. That is, the leaf spring 86 is attached to a lever 89 which is rotatable by a fulcrum 88, a roller 90 located on the bracket 73 is provided at the lower end of this lever 89, and a stopper piece 91 is bent at the upper end side. It is formed. And this stopper piece 91 is attached to the boss 80.
A pin 92 is provided that can be engaged and disengaged. Therefore, when the received image recording section 2 unit is pulled out, the roller 90 comes off from the bracket 73, so that the leaf spring 8
9, the lever 89 rotates counterclockwise about the fulcrum 88, and its stopper piece 91 engages with a pin 92 serving as a locking portion. As a result, an operator may inadvertently press the cam 79 while the unit is being pulled out to replace or set the roll recording paper 16.
Even if an attempt is made to reverse the platen roller 19, it will not rotate and the cutter 21 will not operate, ensuring safety. Then, when the unit is pushed in, the roller 90 rides on the bracket 73,
As the lever 89 rotates back, the stopper piece 91
is separated from the pin 92 and becomes ready for operation. Note that although the cam 79 is locked in the pulled out state, the roll recording paper 16 cannot be moved to the platen roller 19.
When setting it to the side, it does not prevent the platen roller 19 from rotating forward, and it is easy to set it.

Furthermore, the paper ejection mechanism of the paper ejection roller 22 will be explained. First, both the upper roller 22A and the platen roller 19 are driven by the pulse motor 30, but the feeding force of the platen roller 19 is approximately 3.5 to 4 times that of the upper roller 22A, and the peripheral speed (rotation speed) is approximately 3.5 to 4 times that of the upper roller 22A.
Now, due to the relationship between the pulleys 32 and 35, the upper roller 22A
is approximately 1.4 times that of the platen roller 19.
A gear 95 is provided integrally with the pulley 35 via a one-way clutch 94 on the shaft 34 of the upper roller 22A, and a gear 97 is provided via a one-way clutch 96. Furthermore, a gear 98 that meshes with the gear 97 and a gear 99 that meshes with the gears 95 and 98 are provided. Here, the one-way clutches 94 and 96 are gears 96 and 9, respectively.
Upper roller 22A only when 7 rotates clockwise.
is set to rotate. Therefore, the platen roller 1 is rotated by the pulse motor 30.
9 rotates in the normal direction, the gear 95 rotates in the normal direction, the one-way clutch 94 acts, and the upper roller 22A
The roller also rotates normally (clockwise) and feeds the paper together with the platen roller 19. At this time, the rotation speed of the upper roller 22A is about 1.4 times that of the platen roller 19, the upper roller 22A is a metal roller, the lower roller 22B is a rubber roller, and the feeding force is about 1/3, so There is no slack in the roll recording paper 16 between the platen roller 19 and the paper discharge roller 22. At this time, the gear 97 rotates in reverse as shown in FIG. On the other hand, pulse motor 3
0 is reversed and the pulley 35 (gear 95) is reversed, this one-way clutch 94 does not act, but the gear 97 rotates forward through the gears 95, 99, and 98 as shown in FIG. The direction clutch 96 acts, and the upper roller 22A also rotates in the normal direction. At this time, the platen roller 19 reverses and pulls back the roll recording paper 16, and the upper roller 22A and the lower roller 22B move the cutter 21
to eject the cut recording paper. When the platen roller 19 reverses like this, the gear 95,
Due to the ratio of 97, the upper roller 22A is set to rotate at approximately 2.7 times that of the platen roller 19, and while the leading edge of the roll recording paper 16 in front of the cutter 21 is pulled back, the cut recording paper is securely removed. The paper will be ejected onto the tray 23.

As described above, the present invention is provided with a cutter that cuts the roll recording paper by reversing the conveying roller, and locks the conveying roller from reversing when the received image recording section is pulled out of the apparatus, and releases the lock when storing the cutter. Equipped with a reversal prevention mechanism, the cutter can be prevented from operating without using an electromagnetic clutch when replacing roll recording paper, ensuring safety. Once stored, the cutter can resume its original operation. It is something that can be done.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a schematic side view of a facsimile device, Fig. 2 is a side view of the received image recording section, Fig. 3 is a side view of the received image recording section, and Fig. 4 is a side view of the facsimile device. 5 is a side view showing the transmission system of the drive source.
The figure is a plan view showing the drawer mechanism, Figure 6 is a plan view showing the cutter drive system, Figure 7 is a side view thereof, and Figure 8 is a plan view showing the cutter drive system.
The figure shows a side view when the reverse lock is activated, Figure 9 is a timing diagram showing the cutting operation, Figure 10 is a horizontal sectional view showing the transmission system on the paper ejection roller side, and Figures 11a and b show the operation of the gears. FIG. 1... Original reading section, 2... Received image recording section, 16
... Roll recording paper, 19 ... Platen roller (conveyance roller), 20 ... Recording head, 21 ... Cutter, 89 ... Lever (reverse rotation prevention mechanism).

Claims (1)

[Claims] 1. In a transceiver type facsimile device comprising a document reading section and a received image recording section, and the received image recording section is configured as a unit and can be drawn out from the device, a roll is placed in the received image recording section facing the recording head. A cutter is provided which cuts the roll recording paper via a cam clutch mechanism by reversing the conveying roller that conveys the recording paper, and the cutter engages with a locking part provided on the cam clutch mechanism in the received image recording section to cut the recording paper. A reversal prevention mechanism is provided in which a lever that locks the reversal of the conveyance roller and releases the lock by contacting a bracket provided inside the apparatus is provided in response to pulling out and pushing in of the received image recording section. facsimile device.