JPS6153904B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drum scanning type facsimile apparatus having an automatic loading/unloading function for paper such as originals or recording paper.

This is a facsimile device that presses the front and rear ends of the paper against a drum with two bars, and is a simple type that does not have the function of automatically feeding and ejecting stacked originals or rolls of recording paper in sequence. Wrapping and unwinding of paper onto and from the drum was done by hand, including rotating the drum after opening the retractable drum cover installed in a part of the outer casing around the drum. Further, even when these are automated, some manual operations, such as button operations, are required in addition to opening and closing the drum cover.

In recent years, with the spread of facsimile machines, there has been a growing demand for ease of loading and unloading paper onto and from the drum even in simple and low-cost machines.

The present invention meets such requirements; the only manual operation required is to close or open the drum cover (or something similar), and the rest is automatic; in the former case, a predetermined To provide a facsimile device capable of winding paper placed at a position around a drum, and in the latter case, removing the paper from the drum and returning it to a predetermined position.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic external view of a facsimile device to which an embodiment of the present invention is applied. 1 is the outer casing of the entire device, 2 is a drum, and 3 is a drum cover that can be opened and closed in the direction of the arrow. The closed state is shown by a solid line. , the open state is shown by a two-dot chain line. Reference numeral 4 denotes a table on which paper is placed, which also serves as a front cover of the apparatus. Then, the drum cover 3 is opened and paper is attached to and removed from the drum 2.

Next, Fig. 2 to Fig. 7 show the state of the main parts at the time of paper feeding (so-called standby state), Fig. 2 is a plan view of the drum and related main parts, and Fig. 3 is the same as Fig. 2. A-A' sectional view, Figure 4 is also the 2nd
Figure 5 is a front view of the drum and some of its essential parts, and only the side ends of the drum are shown along line C--C in Figure 3.
6 is a right side view of FIG. 2, and FIG. 7 is a left side view of FIG. 2.

First, in FIGS. 2 and 3, the left wall 5,
The drum cover 3 is also rotatably supported on a shaft 7 rotatably supported on the right wall 6, and is in an open state with the shaft 7 as a fulcrum. The shaft 7 has pins 8a and 8b on both sides of the drum cover 3.
The arms 8, which are fixedly mounted, are mounted symmetrically.
The pin 8a is passed through arc-shaped long holes 3a provided on both sides of the drum cover 3, and a play of an angle θ is provided between the pin 8a and the long holes 3a.

The opening/closing movement of the drum cover 3 is controlled by the elongated hole 3a and the pin 8.
a, the shaft 7 is rotated via the arm 8 in the same direction as the opening and closing of the drum cover 3; The pin 8b acts on the bar opening/closing lever 9. The bar opening/closing lever 9 is rotatably supported symmetrically on a shaft 10 fixed to the left wall 5 and the right wall 6, and is applied with a counterclockwise rotational force by a spring 11.

In addition, in the drawings related to the above description, members that are arranged as a pair in a left-right symmetrical manner, such as the arm 8 and the opening/closing lever 9, are given the same number. The same applies to the following description.

As will be described later, the pinch roller 12 has the role of tightly wrapping the paper when it is wound around the drum, and also serves as a guide roller for ejecting the paper when the paper is removed, and is fixed to the bracket 13. A plurality of them are rotatably arranged on the shaft 14. The bracket 13 is rotatably supported by pins 15 fixed to the left and right walls 5 and 6, and is supported by a spring 1.
6 applies a force to the pinch roller 12 in a direction to press the outer periphery of the drum. Further, the drum 2 is fixed to a drum shaft 17 rotatably supported by the left and right walls 5 and 6.

The following description will be made with reference to FIG. 5 as well. The retainer 1 of the bar 18 is in contact with the left and right sides of the drum 2.
9 is rotatably attached to the drum shaft 17, and is prevented from moving in the axial direction by a retaining ring 20.
The bar 18 is an elongated spring plate with a gutter-shaped cross section for clamping the rear end of the paper, and has a length slightly longer than the entire length of the drum 2, and its both ends are fixed to the bracket 21. Furthermore, in order to prevent the clamping force from weakening near the longitudinal center of the paper when clamping the paper, the center of the paper is warped in the direction toward the drum. The bracket 21 is connected to the groove 19 provided in the retainer 19.
The pin 2 is fitted into the bracket 21 and is movable along the groove 19a, that is, in the normal direction of the drum 2.
The tension of the spring 24 acts on the arm 23 rotatably attached to the retainer 19 about the shaft 22, so that the drum 1a is always pulled toward the center of the drum. However, since the pin 9a of the bar opening/closing lever 9 is engaged with the arm 23, the bar 18 is kept open with respect to the drum circumferential surface. Also, at this time, the pin 39 fixed to the side surface of the drum 2 is in contact with the side edge of the bracket 21, and the bar 18 remains in this position unless the drum 2 rotates together with the locking of the arm 23 by the pin 9a. maintained. Further, a groove 21c is formed on the side of the drum of the bracket 21 to serve as a function for the pin 39 as will be described later. This will be explained below with reference to FIG. A bar 25 with a hook-shaped cross section for clamping the front end of the paper is formed slightly shorter than the entire length of the drum 2, and is movable in the normal direction of the drum in a groove 2a provided over the entire length of the drum 2. The tension of a spring 28 acts on both ends of the arm 27, which is rotatably attached to the drum side surface with a shaft 26 as a fulcrum, so that it is always pulled toward the center of the drum. However, in this state, the pin 21 which forms an integral structure with the bracket 21
Since bar 25 locks arm 27, bar 25 maintains opening 25a. This will be explained below with reference to FIG. 6 as well. On the outside of the right wall 6, a cam 29 is attached to the shaft 7 with a loose fit and is rotatable. Further, a dog 30 is fixed to the shaft 7 in order to transmit the rotation of the shaft 7 as the drum cover 3 opens and closes to the cam 29. The shutter 32 is rotatably supported on a shaft 31 fixed to the right wall 6, and the rotation of the dog 30 is transmitted through a link 33.
It is designed to open and close the optical path of 5. moreover,
A drum stop lever 37 rotatably supported on a shaft 36 fixed to the right wall 6 is supported by a spring 38.
A clockwise rotational force is applied to the drum stop cam 40 by the drum shaft 17, and the drum stop cam 40 is engaged with and locked in the recessed portion of the drum stop cam 40 fixed to the drum shaft 17. For this reason, the drum 2 is maintained in a constant position, ie in the position where the bar 25 is open. Here, the drum stop lever 37 is connected to the cam 2 as described later.
It is operated by the rotational displacement of the drum stop cam 40, and opens and closes the sensor 42 with a shutter 41 fixed to the side.
Rotary shutter 43 provided with a notch 43a
is fixed to the drum shaft 17, and activates the sensor 44 when necessary, as will be described later.

This will be explained below with reference to FIG. 7 as well. left wall 5
A cam 45 is fixed to the shaft 7 on the outside thereof. The spring 46 is installed so that its axis 46a moves when the cam 45 rotates via the shaft 7 when the drum cover 3 is opened and closed.
Cam 45 with consideration point 47 as the boundary, therefore,
Apply a snap motion to the shaft 7. KITSUKA LEVER 4
Reference numeral 8 denotes a stopper pin 51 which is rotatably supported on a shaft 49 fixed to the left wall 5 and has a rotational force in the counterclockwise direction by a spring 50.
It is stopped and kept in place. A kicker cam 52 fixed to the drum shaft 17 acts on the kicker lever 48 when necessary, as will be described later. motor 5
Reference numeral 3 designates a synchronous motor driven by alternating current, which transmits power to the drum shaft 17 via a timing belt 54 and gears 55 and 56.

Next, the related operations between the sensors 34, 35, 42 and 44 and the control circuit will be explained with reference to FIG. Sensors 34, 35, 42 and 44 are all small photointerrupters that produce outputs in response to the opening and closing of the inherent optical path. In this embodiment, this output signal is used to connect, disconnect, or switch each part of the circuit described below. Opening/closing of the sensor 34 (Figure 6 shows the open state)
opens and closes the switching circuit 34' and turns the relay 59 on and off. The opening/closing of the sensor 35 (FIG. 6 shows the open state) is controlled by the motor 53.
The switching circuit 35' for switching the direction of rotation is changed between forward and reverse directions. The opening/closing of the sensor 42 (FIG. 6 shows the open state) is controlled by the switching circuit 4.
2' to open and close the drive circuit of the motor 53.
Turn on/off. Furthermore, the opening/closing of the sensor 44 (FIG. 6 shows the closed state) is done by opening/closing the switching circuit 44' and turning the relay 59 ON/OFF.
do. The contact 59a of the relay 59 is connected to this relay 5.
When 9 is ON, it is connected to 59', and when it is OFF, it is connected to 59''. 57 is the rotation speed control circuit of drum 2,
By controlling the frequency of the power supply supplied to the motor 53, the drum 2 is rotated at a main scanning speed during facsimile communication, and is automatically switched to low speed rotation for loading and unloading paper as soon as the communication ends. Reference numeral 58 denotes a control circuit that closes the switching circuit 58' and opens the switching circuit 58'' only during the main scanning rotation of the drum.As will become clear from the explanation below, the above switching circuit group when facsimile communication is completed The switch state is as shown in FIG. 8. Therefore, when the drum is rotating at a low speed, the capacitor 60 is charged.
The notch 43a of the rotary shutter 43 is connected to the sensor 4.
4 is detected and the switching circuit 44' is opened, the relay 59 turns OFF, and therefore the contact 59a
is switched to 59'', and the drive circuit of the motor 53 is cut off.At the same time, the capacitor 60 is discharged,
DC braking is applied to the motor 53, and the drum 2 is stopped instantly. Since the positional relationship between the drum 2 and the rotary shutter 43 is constant, the drum 2 stops at a constant position within a very small error range. Even if the drum 2 rotates for some reason after it has stopped in its normal position, such as movement of the device, and is removed from its normal position, the rotary shutter 43 closes the sensor 44 at the same time, so that the state shown in FIG. 8 is returned to. The drum 2 returns to the original position and repeats the above-mentioned operation until the drum 2 stops at the regular position. This relationship lasts as long as the device is powered on.

Next, the operation of automatically loading and unloading paper onto and from the drum 2 will be explained based on FIGS. 3, 4, and 6 to 15.

First, explanation will be given with reference to FIGS. 3, 4, 9, and 10. The operator places the paper 61 on the paper table 4 by inserting the front end into the opening 25a of the bar 25 that clamps the front end. Next, close the drum cover 3. During this closing process, as shown in FIG. 9, when the drum cover 3 reaches the 3' position, the pin 8a is at the 8a' position.
Therefore, arm 8 rotates to 8' and pin 8b
is displaced to position 8b'. This displaced pin 8
When the bar opening/closing lever 9 is rotated to the position 9' by the tension of the spring 11 due to b', and the pin 9a is also displaced to the position 9a', the arm 23 is rotated by the spring 24.
is also displaced to the position 23'. Therefore, the pin 21a of the bracket 21 is also displaced to 21a', and the pin 21b is also displaced to 21b'. Due to this displaced pin 21b', the arm 27 is displaced to 27' by the tension of the spring 28, and the front end clamp bar 25 is moved to 27'.
It is moved to the position 5' and closed, and the front end of the paper 61 is clamped. In addition, the arm 23' has a pin 21a',
Rear end clamp bar 18 via bracket 21'
However, since pin 9a' locks arm 23', bar 18' remains open from drum 2.

When the drum cover 3 is further closed to the 3'' position, the cover 3 is now in a completely closed state and is further displaced to the pin 8a'', arm 8'', and pin 8b'' positions. Since the shaft 7 rotates by the same angle as the arm 8 to 8'', each member on the right wall b side shown in FIG. 6 shifts to the state shown in FIG. is 3
2', and the cam 29 is displaced to 29', and further,
The cam 29' displaces the drum stop lever 37 and the shutter 41 to positions 37' and 41'. The rotation of the shaft 7 causes the cam 45 on the left wall 5 side in FIG.
Displace it to. Since the axis 46a of the spring 46 exceeds the point 47, the cam 45' has a rotational force in the direction of reaching 45'', but the cam 45' has a rotational force that reaches 45''.
It is stopped at 45' and maintained at 45'.

Here, the operations of the sensors and the control circuit in the process of closing the drum cover 3 will be explained.
In FIGS. 6 and 11, the sensor 35 is closed when the shutter 32 is displaced to 32'. The timing at which this sensor 35 is closed is when the position of the drum cover 3 shown in FIG. 9 is between 3' and 3'', that is, between arms 8' and 8''. The sensor 42 is opened at its notch 41a' when the shutter 41' is in position, and the timing is after the sensor 35 is closed. FIG. 13 shows the operating states of the sensors and control circuit shown in FIG. 6. The following description will be given with reference to FIG. 13 as well. When sensor 35 is closed, switching circuit 3
5' is connected to the forward rotation (direction of arrow 62 in FIG. 7) terminal of the motor 53, and then when the sensor 42 opens, the switching circuit 42' closes and the motor 53 is driven. The drum 2 is driven by the motor 53.
rotates, and winding (attachment) of paper to the drum 2 begins, as shown at 61' in FIG. At this time,
The arm 23' of the bar 18' is locked by the pin 9a, so even if the drum 2 rotates, the retainer 19
does not move and therefore maintains its position together with the bracket 21'. As the drum 2 rotates, the kicker cam 52 shown in FIG.
8 to 48' to release the lock from the cam 45'. The released cam 45' is connected to the spring 46.
The lever is moved to the 45″ position by pressing the lever 4.
8 in the 48″ position.

This will be explained below with reference to FIGS. 9 and 12. Due to the displacement of the cam 45'', the arm 8'' becomes 8 through the shaft 7, and therefore the pins 8a, 8b
Displaced to. The pin 8a makes the bracket 13 13', so the pinch roller 12 becomes 12', and the pin 8b makes the bar opening/closing lever 9'', pin 9a'', so the arm 23'' and the bracket 21'' become the rear end clamp. Bar 18' is 18''
, and clamp the trailing edge of the paper 61. At the same time, the lock between them is released by the pin 9a'' and the arm 23'', so that the retainer 19, the bracket 21'' and the bar 18'' can rotate together with the drum. Also, at this time, the pin 39 is in the position shown in Fig. 12, and the bracket 21'' is attached to the groove 21c.
Since the concave portion of the pin 39 engages with the pin 39, the closed bars 18'' and 25' are in a fixed positional relationship.Also, the displacement of the cam 45'' shown in FIG. 7 is at the same time as shown in FIGS. The dog 30' shown is 30'', therefore the cam 29' is 29'', the drum stop lever 37' is 37'', and the shutter 4 is 30''.
1' is 41'', the notch 41a' is 41a'', and
It is assumed that the shutter 32' is 32''.The following description will be made with reference to FIG.
2' opens to cut off the drive circuit of motor 53, then sensor 34 closes and therefore switching circuit 34' closes. With the above operations, winding (attachment) of the paper 61 to the drum 2 is completed, but at this moment, the rotary shutter 43 is not connected to the sensor 44.
Since it is in the open position (see FIG. 14), the switching circuit 44' is open. Therefore, relay 59 remains OFF, and contact 59a remains OFF.
9'', the motor 53 is not driven.

However, at the next moment, drum 2 after wrapping was completed.
The rotary shutter 43 is rotated in the direction of the arrow 63 due to the inertia of the rotary shutter 43, thereby closing the sensor 44. Therefore, switching circuit 44' is closed and relay 59 is closed.
turns ON, so it becomes contact 59' and connects motor 53.
is driven, and capacitor 60 is charged. This is the state shown in FIG. 8. Therefore, the next time the sensor 44 detects the notch 43a of the rotary shutter 43, the aforementioned DC control circuit is activated, and the rotary shutter 43 is moved to the position shown in FIG. Stop at. Therefore, the drum 2 also stops at the position shown in FIG. 12 with the paper wound thereon. This fixed position stopping operation of the drum 2 is performed by the drum cover 3, which will be described later.
The function is to enable the winding release means to be activated by opening the winding mechanism.

Here, normally, the control circuit 5 as shown in FIG.
By the operation 8, the drum is rotated in the main scanning direction, and the scanning table 64 shown in FIG. 3 is moved in the sub-scanning direction, thereby performing facsimile communication.

When the facsimile communication is completed, the DC braking circuit operates as described above, and the drum stops in the state shown in FIG. 12, that is, the state at the end of winding. The same applies to the states of other members.

In Fig. 14, when the drum cover 3'' is opened to position 3, the shutter 32'' rotates clockwise together with the shaft 7 and the dog 30'', and the sensor 34 is first opened. When the sensor 34 is opened, the switching circuit 34' is also opened, and the relay 59 is opened.
is turned OFF and the DC braking circuit is cut off. The sensor 35 is then opened and the switching circuit 35' switches the motor 53 to the reverse terminal.

Meanwhile, during this time, the arm 8 shown in FIG.
Since the pins 8a and 8b also rotate clockwise together with the shaft 7, the pinch roller 12' releases the locking of the bracket 13' by the pin 8a and the paper 61
press against the surface. In addition, the bar opening/closing lever 9'' is pushed by the pin 8b and rotates clockwise about the shaft 22, and the pin 9a'' pushes up the arm 23''. Therefore, the bracket 21'' is also moved via the pin 21a''. The pin 39 is pushed up, and the recess of the groove 21c and the pin 39
is disengaged. With this movement, the bar 18''
is separated from the drum surface, and the rear end clamp of the paper 61 is released.

In this manner, when the drum cover 3 is fully opened, the above-mentioned members are in the state shown in FIG. 15. However, just before reaching the state shown in FIG. 15, the cam 29'' shown in FIG. 14 has been rotated to 29' and is no longer locked to the drum stop lever 37''. Therefore, the drum stop lever is at the position 37', and its tip is brought into contact with the outer periphery of the drum stop cam 40. Furthermore, since the shutter 41'' is in the state 41' and the notch 41a' opens the sensor 42, the switching circuit 42' shown in FIG. The bar 18 rotates and begins to eject the paper 61 onto the paper table 4. At this time, the bar 18 is already connected to the arm 2 with the pin 9a.
Since the retainer 19 is locked through 3, it is maintained in the position shown in the figure. Also, as shown in Fig. 7, the cam 45'' is returned to the 45 position, and the kicker lever 48'' also attempts to return to the 48 position, but the kicker cam is at the 52' position just before the drum discharge rotation, so the kicker lever 48'' is returned to the 45 position. is stopped at the 48' position.

Note that these members shown in FIG. 7 have no role during the paper ejecting operation.

Now, the drum stop cam 40 shown in FIG.
rotates together with the drum during paper ejection operation.

This will be explained below with reference to FIG. 6 as well. The drum stop cam 40, which rotates together with the drum, is at the position where the drum stop lever 37' is at 3.
The shutter 41' is moved to the position 7 and is stopped together with the drum because it engages with the recessed portion, but the sensor 42 is closed in the middle of the shutter 41' reaching the position 41 according to this displacement. When this sensor 42 is closed, a switching circuit 42' shown in FIG.
is opened, and the drive circuit of the motor 53 is cut off. The displacement described above also displaces cam 29' to 29. The pin 39 shown in FIG. 15 reaches the position shown in FIG. 3 when the drum is stopped. Further, before the drum 2 stops, the arm 27 rides on the pin 21b and begins to open the bar 25', and when the drum 2 stops, it is maintained at the position shown in FIG. 3 and becomes the bar 25, unclamping the front end of the paper 61. This completes the paper ejecting operation, and the paper 61 is returned to the position shown in FIG.
Furthermore, each member has also returned to its state at the time of paper supply.

As described above, according to the present invention, there is provided a drum that is rotatably installed, a first and a second drum that can be opened and closed with respect to the surface of the drum, and that presses the surface of the drum when the drum is closed. A drum-scanning type facsimile apparatus in which both ends of the paper are clamped to the drum by a bar, which comprises a mechanical control means and an electric control means operated by manual opening and closing of the drum cover. , automatically winds the paper in a predetermined position around the drum simply by closing the drum cover,
The feature is that the wrapping is automatically released by simply opening the bag.

Therefore, by simply closing or opening the drum cover (or something similar), the paper placed in a predetermined position can be automatically wound around the drum, or the paper can be automatically wound around the drum. The paper can be automatically removed and returned to its designated position.

[Brief explanation of the drawing]

FIG. 1 is a schematic external view of a facsimile machine to which an embodiment of the present invention is applied, FIG. The figure is also a cross-sectional view taken along line B-B' in Figure 2.
The figure is a front view of the drum and some of its essential parts;
The figure is a right side view of FIG. 2, and FIG. 7 is a right side view of FIG. 2. FIG. 8 is an explanatory diagram of the relational operation between the sensor and the electric control circuit, and FIGS. 9 to 15 are operational explanatory diagrams for explaining each operation. 2...Drum, 3...Drum cover, 8...Arm, 9...Bar opening/closing lever, 12...Pinch roller, 18...Bar, 19...Retainer, 21...
...Bracket, 23...Arm, 25...Bar,
27...Arm, 29...Cam, 30...Dog, 32...Shutter, 34, 35...Sensor, 37...Drum stop lever, 39...Pin, 40...Drum stop cam, 41...Shutter , 42...sensor, 43...rotary shutter, 44...sensor, 45...cam, 48...
...Kitsuka lever, 52...Kitsuka cam, 54
...Motor, 57, 58...Control circuit, 59...
Relay, 61...Paper.

Claims (1)

[Claims] 1. A rotatably installed drum, which can be opened and closed at a predetermined position on the surface of the drum, and when the drum is closed, presses the surface of the drum and winds the winding onto this drum. first and second bars clamping the front and rear ends of the paper to be attached, respectively; and a drum cover provided on the top of the drum so that it can be opened and closed; In a drum-scanning facsimile device in which the paper is wound around the drum and unwrapped in response to opening and closing of the drum cover,
1 in conjunction with the movement of the drum cover being closed.
a bar opening/closing control mechanism that controls the opening and closing of the first and second bars in accordance with the displacement of the arm; and a first cam that is displaced together with the arm and has a snap motion force. , a locking lever that maintains the arm at the end point of the primary displacement by locking the first cam in the middle of the movement after passing the consideration point; means for clamping the front end of the paper by moving from the open position to the closed position, and for causing the second bar to take an intermediate position from the open to the closed position; and a means for detecting the displacement movement of the arm. means for determining the rotational direction of the drum using the sensor No. 1, and a mechanism for transmitting movement of the arm at the end of the primary displacement of the arm to primarily displace the drum stop lever to a position where it is released from the drum. At the same time, means is configured to give a rotation command to the drum using a second sensor that detects this displacement position, and the kick lever is turned at a predetermined position by rotation of a second cam that is in a fixed positional relationship with respect to the drum. By releasing the lock from the first cam, the arm is caused to undergo a secondary displacement, and this secondary displacement moves the second bar from the intermediate position to the closed position to clamp the rear end of the paper and also causes the paper roll to float. Means for separating a pinch roller for prevention from the drum and at the same time secondarily displacing the drum stop lever, detecting this displacement with a second sensor and cutting off the drum drive circuit during winding; When the arm is displaced to the primary displacement starting point in conjunction with the movement of the drum cover being opened, this displacement causes the first sensor to command the rotation direction of the drum opposite to that when winding the paper. The pinch roller is returned to the drum pressing position, the second bar is returned to the open position via the opening/closing control mechanism, and the drum stop lever is moved to the first position.
Means for causing the second sensor to command rotation of the drum by returning to the next displacement position, and in response to this command, the drum rotates and unwinds the paper;
means for detecting displacement of the drum stop lever when it locks the drum with the second sensor and disconnecting the drum drive circuit; and means for opening the first bar when the drum is locked. a facsimile device comprising: means adapted to assume a position; 2. A rotatably installed drum, which can be opened and closed at a predetermined position on the surface of the drum, and when the drum is closed, presses the surface of the drum, and the front and rear ends of the paper to be wound around the drum. The first and second
and a drum cover installed on the top of the drum so that it can be opened and closed, and when the drum is in a fixed position, the paper is wound around the drum and unwrapped in response to opening and closing of the drum cover. In the drum-scanning facsimile device, detection of a fixed point at which the drum should be stopped at the fixed position among the rotational positions of the drum is set as a first position, and all other points are set as second positions. When the detector detects the first position, the detection signal is used to cut off the circuit of the drum drive motor, apply direct current braking to the motor for a certain period of time, stop the drum, and stop the drum. If the drum deviates from the stop position, the detector detects the second position, and the detection signal immediately drives the drive motor to rotate the drum and detect the first position again. , a facsimile device in which the drum is stopped at a fixed position.