JPS58125066A - Driving control mechanism of optical member of copying machine - Google Patents

Abstract

PURPOSE:To simplify a stop controlling system and to prevent turning of a driving pulley, by providing a selecting signal generating means for selecting a desired position of an optical member and moving the optical member to the selected desired position on the basis of the selecting signal. CONSTITUTION:In a driving control mechanism, a lens unit 1 is stopped in a desired position, which is selected by the selecting signal generating means, by stopper members 10a and 10b provided on the movement path of the lens unit 1, and either of pulleys 22a and 22b provided in both ends of the lens unit 1 in the direction of reciprocation is shaked in accordance with this stop, and this shaking is detected to break the driving force of the driving pulley, and the stop state of rotation driving is held by a controlling means until the next selecting signal is generated. Thus, the stop controlling system is simplified, and turning of the driving pulley is prevented surely.

Description

[Detailed description of the invention] Technical field The present invention FJ: In multi-pull agitation, driving an optical part such as a lens unit, mirror, etc. supported by a linear curved back and forth movement/curved rotation M"Q to multiple positions. and positioning stop F1
- Drive control - This is a trivial matter.

Conventional technology In general, the copying magnification can be changed (in the copiers that can be used, the magnification customization methods can be divided into the following three types.

(1) Method of changing the lens unit position and changing the mirror position to change the conjugate distance (11) Method of changing the lens unit position and adding an auxiliary lens for changing the magnification to the lens unit (conjugate distance (iii) Method of using a zoom lens or converting the lens cone itself In this case, in the methods (i) and (ii) above, the lens unit and mirror or only the lens unit are converted into multiple lenses according to the magnification. You need to move it into position.

Conventionally, as a drive control mechanism for optical members such as lens units and mirrors, the optical member is moved by a motor, and when the optical part (O) comes into contact with a stopper member provided at a desired position to adjust the magnification, the optical member It was common to cut off the power to the motor using a switch member made of iron (see Japanese Utility Model Application No. 54-153231).

However, in such a drive control mechanism, a stopper member and a switch member must be provided for each stop position of the optical member, and both members are used to stop the optical member at the IF position and to stop the optical member at the desired position. Then (when it came into contact with the stopper member), it was necessary to adjust the circumferences of both members in a relative manner so that the switch member would act to break the coupling.

In addition, the copy magnification must be changed in various ways depending on the destination country or Yuri's request (even if it is a copy of the same model (at a port). For example, in the United States, the reduction is (Xo, 64)
is common, but in Japan and European countries it is 1f (X
o, 7) or (Xo, 8) are common. Even for such changes in magnification, it is necessary to adjust all the stopper members and switch parts in a correlated manner as shown in the figure.

That is, the conventional drive control mechanism has the disadvantage that it must be provided with stopper members and switch members as many as the number of copying magnifications, and that assembly and adjustment are extremely complicated.

Therefore, Motoyama 191 removed the above drawbacks, and regardless of the number of changes in the copy magnification, it was only necessary to prepare one type of city stop system, and two detection members were required for the city stop position. Copying that is easy to assemble and adjust, and reduces costs: 44 drive control mechanisms for the optical members on the front are eliminated (Tokuryo Page No. 108436, 1988).

That is, the drive control i11 mechanism proposed by the applicant is as follows:
An optical member supported so as to be able to reciprocate linearly, a pair of pulleys provided at both ends in the reciprocating direction of the optical member so as to be swingable on a plane parallel to the movement path, and a pair of pulleys disposed between the two pulleys. A drive pulley that can be driven in forward and reverse rotation, a wire wound around the drive pulley and a wire attached to the optical member described in -1- A biasing member that biases the optical member, a plurality of stopper members provided on a moving path of the optical member to stop the optical member at a desired position, and a swing detection member that detects floating of both the pulleys. A swing detection member detects the swing of the pulley due to the contact of the optical member with the stopper member, and cuts off the driving force of the drive pulley.

However, in this case, the elastic force (spring force) of the pulley biasing means (usually a plate spring is used) causes the activation member (an energizing microswitch is used) to turn on and off repeatedly. This has the drawback that so-called bouncing occurs, and even after the optical member has stopped at a desired position, the drive 1@pulley is rotated by a pulse-like ON signal due to the bouncing. On the other hand, such bouncing is an unavoidable phenomenon in the combination of a plate spring and a microswitch, and while weakening the spring force of the plate spring can eliminate the negative effect to some extent, conversely, the biasing force against the pulley is weakened. Not preferable.

Purpose The present invention has been made in view of these drawbacks, and its purpose is to prevent the drive pulley from rotating even if bouncing occurs in the swing detection member after the optical member has stopped at a desired position. An object of the present invention is to provide a drive control mechanism for optical members in a copying machine that ensures reliable operation.

To achieve the above objectives, the present invention provides a drive control mechanism that includes, in addition to each component of the drive control mechanism described above proposed by the applicant, a mechanism for selecting a desired position of an optical member. A selection signal generating means, and a driving pulley is rotated to move the optical member to a selected desired position by the selection signal of the generating means. 1.JJI is detected by the 1 output/detection member and the rotation/drive of the drive pulley is stopped, and the 161 rotation drive stop state is maintained until the next choice word is issued. Embodiment 8 An embodiment of the present invention will be described below with reference to the drawings.

In this embodiment, the 'fV7 magnification ratio has two magnification functions: equal 1 tone and 7 reduction.

Lens unit 1) is attached to the carriage (2) with the band (4)
It is held by the slide bearing (5) (7).
'('III +6+1 is supported by a guide rail that can be moved back and forth linearly, and the other side is a guide roller (7)'1 guide rail (
8) It is supported by being rotatably provided on the top. The stopper members (10a) and (1ob) are used to stop the lens unit (1) in item 1 at the same-magnification copying position and the reduction copying position. 10a) is the carriage (2
) The reduction stopper member (10b) is fixed to the frame so that the rear end of the carriage (2) is located so that the rear end of the carriage (2) is located so that the rear end of the carriage (2) is located so that the rear end of the carriage (2) is located so that the rear end of the carriage (2) is located at the front end of the frame. Otsu.

The dynamic pulley @) is fixed to the output shaft of a drive motor (21) which is installed on the mounting plate (15) and can rotate in forward and reverse directions.

A pair of pulleys (22a) and (22b) are attached to the mounting plate (15)
It is rotatably attached to levers (24a) and (24b), which are provided with one floating lever (24a) and (24b) using support shafts (232> and (23b)) as fulcrums, and is located at both ends of the reciprocating direction of the unit. . This pair of pulleys (22a), (
22b) and the above driving goo January 20) have wires (16)
is wound, and the projection (3) of the carriage (2) of the lens unit 1) is attached to a part of the wire (1). That is, when the driving motor 121) is rotated in the forward direction, the driving boolean 20) rotates counterclockwise in FIG. 1, and according to this rotation, the pulleys (22a), (
22b) is 1iij l-, r1 turned te'7 iya (
1B) Move the lens clockwise and move the lens unit 11), guide shaft (6), and guide rail (8) toward the front (to the left in Figure 2). . On the other hand, when the drive motor (21) is reversed, the lens unit 11) moves backward (to the right in FIG. 2), contrary to the above.

In addition, the levers (24a), (24b) and the U support shaft (23
Tension spring (2) wound around a) and (23b)
5a) and (25b) in the counterclockwise direction [lever (24a)) and clockwise direction [lever (24+)], respectively.
Apply heat elastically to λ1, making sure that the wire ((6) does not loosen).

Micro switch (SW3), (SW4) t
These are for detecting the swinging of the levers (24a) and (24b), respectively, and the plates are +2 (27a),
(27b) via telebar (24a), (24b
) are opposed to the protrusions (25a) and (25b). That is, when the drive motor (21) rotates forward, the end of the carriage (2) comes into contact with the stopper member (10a) and the lens unit (1) stops at the same magnification position, and the wire (16) A portion (16a) is wound around the drive boob (20), and the lever (24a) swings in the clockwise direction in the 2117+ direction with the pulley (22a) and the support m+ (23a) as a fulcrum, and the protrusion (25a) The leaf spring pressed by (
27a) turns on the microswitch (SW3). This signal causes the power supply to the drive motor t21+ to be cut off. On the other hand, when the drive motor 21+ reverses, the other end of the carriage (2) comes into contact with the stopper member (10b) and the lens unit (1) stops at the reduced position (see Figure 4), and the wire A part (16b) of (16) is wound around the drive pulley (20), and the lever (
24b) together with the pulley (22b) pivots around the spindle (23b) as a fulcrum in the clockwise direction (Fig. 4), and the plate spring (27b) pressed by the protrusion (25b) is the micro switch. (SW4) Turn on 5. This signal causes the drive motor (21) to be de-energized.

Also, regardless of whether the stop position number is the same size or reduced size, the levers (24a) and (24b) are connected to the pulley (22a),
(22+)) along with the tension spring (26a
), (25b) and the leaf springs (27a), (27b) will receive biasing forces in the counterclockwise direction and clockwise direction, causing the lens unit (1) to shift in position.In other words, the stopper member The separation from (1, Oa) and (10b) is prevented.

Furthermore, the lens unit (1) includes an auxiliary lens (3).
0) is attached (see Figure 5). This auxiliary lens (30) is designed to retreat from the optical path when the image is at the same magnification, and enter into the optical path when the image is reduced.

The frame body (31) holds the auxiliary lens (3), and is rotatable via the auxiliary lens carriage (34) attached to the side of the lens unit (1). ) is set up so that it can move forward and backward, and the light path (35
) has a fixed Boo January muddy. Boo January 36) is a spring (4) inserted into the beak-shaped recess (371).
Connect one end of 0) to the hole (38) and the other end to the hole (38) of the frame 01).
33) is biased in the counterclockwise direction in Figure 5. Wire (41) Boo 1/36 at one end
) is wound counterclockwise in Figure 2, and the other end is attached to the frame, etc.

Further, the frame body (31) is biased by a spring (42) wound around the shaft (351) in the clockwise direction in FIG. Pin (32) on body (131) is boo January 30
It is regulated by contacting the protrusion 139).

In the above configuration, when the lens unit 11) moves to the same magnification position as shown in FIG.
40) in the counterclockwise direction in FIG. 1, and the protrusion 09) urges the pin (32).
The auxiliary lens (30) rotates counterclockwise and retreats from the optical path. On the other hand, the lens unit 11)
When moved to the reduced position as shown in 1, the wire (41)
The goo IJ (35) is the spring (40
), the wire (41) is rotated clockwise in the middle of the 41st '21, and the wire (41) is wound up.
By releasing the engagement with the pin (32), the auxiliary lens (30) is urged by another spring (42), rotates clockwise, and enters the optical path.

Fig. 6 shows the split nail circuit of this drive/vb control 1ii11 mechanism.

This control circuit is a D type flip-flop (47a
), (47b) to construct a self-holding circuit. This flip-flop (47a).

(47b), the input (P R) is "T-I"
” outputs the I-ring in the form of one human power (CL) from the output (Q, ), and the input (PR) is If L n and the input (CI
-) outputs "H" from the output (Q) to "11", and the input (PR) is II L n and the input (c r-) is input (cp) to II L n. At the rising edge of , the state of the input (D) is inverted, outputted from the output (Q), and held until the next rising edge of the input (cp).

Here, the suction relationship of the control circuit is shown in blue and light. The switch (SWI) is for selecting the same magnification, and the switch (SW2) is for reducing the selection. They are connected to the input ports ■ and ■ of the microcomputer, respectively. has been done. This input port■,■
The input signal of is the output port ■.

It is output from ■, and the inverter (4
6a), (46b) through the same magnification display lamp (Ll),
A reduction display lamp (L2) is connected, and lights up to indicate whether the same size or reduction is selected.

On the other hand, the above microswitch (SW3) has a flip 70
It is connected to the inputs (CP) and (PR) of the knob (47a), and the inverter (48a) 44 is connected to one input terminal of the AND circuit (48b). Another micro switch (SW4) is a flip-flop (
The input (CP) of 47b) is connected.

The reset circuit (49) outputs "II" for about 100 msec to indicate that it is set, and then enters the reset state. At the time of reset, it outputs LL L", and the output is connected to the input port of the microcomputer < gsr >Connected to one input terminal of the OR circuit (50) and further connected to the input (PR) of the flip-flop (47b).The 11Hll output of the reset circuit (49) is connected to the input port (R8T). When input, output ports ■ and ■ become L.
” is reset, and the II L n output is input to (R8T), the output port
”, the output port ■ outputs “L”. Also, when the reset circuit (49) is in the reset state and the equal magnification selection switch (SWl) is turned on, the output port ■ outputs 11H+
l, output port ■ outputs "L". Similarly, when the reduction selection switch (SW2) is turned on, the output port ■ outputs II L n, and the output port ■ outputs II H*+. And the output port ■ is a flip-flop (4
7a), the input (CL) of another flip-flop (47b), and the open input terminal of the AND circuit (48b).

The output port ■ is connected to the other input terminal of the OR circuit (2)).

In addition, the output terminal of the OR circuit (field) is connected to the input (CL) of the flip 70 tube (47a), and the input (D) of another flip-flop (47b) and one input terminal number of the AND circuit (43b). The output terminal of the AND circuit (48b) is connected to the - real input terminal of the AND circuit (43a), and a flip-flop is connected to the other input terminal of the AND circuit (43a). (
The output (Q) of 47a) is connected. The output (Q, ) of the flip-flop (47b) is connected to the other above-mentioned AND circuit (43b) + 7) fl side large input terminal. The terminal is connected to the motor drive circuit (45), and the drive motor (
21) is configured to rotate forward with the +1 Hn output from the AND circuit (43a), and reverse with the "I-1" output from the AND circuit (43b).

In the above configuration, when the power is turned on (initial state),
The reset circuit (49) is approximately I Q Q m5ec” I
-I”, and this output is the input port (R5T) +
When this is input, output ports ① and ② are set to “L”. When "f(" is input to the OR circuit (49), the input (CL) of the flip-flop (47a) becomes "El", and the flip-flop (47a) outputs 11 H++. ) output (Q,) Regardless of whether the id microswitch (SW3) is on or off °'
Outputs H.

However, the output of the AND circuit (4811) that will be input to the AND circuit (43a) is
Even if the other input terminal of 8b) is input from the output port ■, it is always 'L', and the AND circuit (43a) is 'H'.
, j: Never output. On the other hand, flip-flop (
The input (CL) of 47b) is L from the above output port
is input, and the input (PR) is a reset circuit (49
), the output (Q) outputs the L of the input (cr-), and this output is input to another AND circuit (43b). In this state, the microswitch (SW4) is turned on and the input (cp) is I.
Even if it becomes I H++, the AND circuit (43b)
In other words, the AND circuits (43a) and (43b) do not output 'tHr+, regardless of whether the microswitches (SW3) and (SW4) are on or off.
++, and the drive motor (21) maintains a stopped state.

After approximately 100 m5ec, the reset circuit (49)
is reset, the reset circuit (49)
”, the output port ■ is set to “H”, and the output port ■ maintains II L n.The OR circuit group outputs N L 11 because both input terminals are at “P”.
The - real input terminal of the AND circuit (43b) also becomes If L++, and the AND circuit (43b) never outputs "H". That is, the drive motor c! 1) is never reversed. In addition, the input (C) of the flip-flop (47a)
L) becomes II L +n, and the input (PR) of the other flip-flop (47b) is connected to the reset circuit (4
9) inputs u L n, and the AND circuit (48b)
"H" is input from the output port (2) to the other input terminal of.

Therefore, when the lens unit (1) is stopped at the same magnification position and the micro switch (SW3) is turned on, its "H" output inverter (
48a), and the input to the - real input terminal of the AND circuit (48b) becomes "L".
The - real input terminal of 3a) is a flip-flop (47a).
II, which is the input signal from the output (Q) to the input (CL) of
L n is input, and the AND circuit (4, 32) is always 11
As described above, the AND circuit (43b) also outputs +1 L++, and the drive motor 21+ does not rotate.

On the other hand, when the lens unit 11) is not at the same magnification position and the microswitch (SW3) is off, a pulse L is input to the input (PR) of the flip-flop (47a), and the AND circuit (43a) is turned off. )'s - real input terminal receives "■]" from the output (0) of the flip-flop (47a).Furthermore, the AND circuit (48b)'s - real input terminal is inverted by the inverter (48a). "H'" is input to the other input terminal, and 11H is input from the output port ■ to the other input terminal.
Since ++ is input, the AND circuit (48b) is “
The AND circuit (43a) outputs "[I". However, the drive motor (21) rotates in the normal direction, the lens unit 1) moves to the same magnification position as described above, and the tip microswitch (SWa) swings (the iron microswitch (SWa) is turned on). That is, when the lens unit 1) is not at the same magnification position, the above-mentioned operation is performed as an initial setting to return the lens unit (1) to the same magnification position.

The output (
Q) inverts the state of the input (D) and outputs +1 L++ [this state is held until the next rising edge of the input (cp)], and one input terminal of the AND circuit (43a) is 11.
-yy. As a result, the output of the AND circuit (431) becomes If L++, and normal rotation of the drive motor (21) is stopped. Here, micro switch (SWa) i
Even if this bouncing occurs and turns on and off repeatedly, and +1 Hn is output in a pulse form from the AND circuit (48b), the output (Q) of the flip-flop (471) is I
In order to hold I L n, the AND circuit (43a)
Without outputting I Hn, the drive motor [21+ will not rotate again.

Here, when the above switch (SW2) is turned on and reduced copying is selected, the output port ■ becomes 'L'', and the output port ■
becomes 'H', the OR circuit (50) outputs 'II' 12, and this output (ri) is connected to a flip-flop (
47a) input (ct), 7 lips 70 tubes (47b)
input (D) to the AND circuit (43b). The II L l+ output of the output port ■ is a flip-flop (
47a) and the other input terminal of the AND circuit (48b), the AND circuit (48b) outputs 'L', and the AND circuit (43a) never outputs 'H'. That is, the drive motor (21) never rotates in the normal direction.

Since the input (PR) of the flip-flop (47b) is low and the input (CL) is "L", ll Hn is output from the output (Q), and this output is output from the AND circuit (43b). ) is input to the other input terminal. Therefore, the AND circuit (4, 3b,) outputs II H++, the drive motor (Flash) reverses, the lens unit (1) moves to the reduction position, and the lever (24b)
The microswitch (SW4) is turned on by the rocking. The input of the flip-flop (47b) by this ON signal (
At the rising edge of cp), the output (Q) inverts the state of the input (D) and outputs "L" [this state is held until the next rising edge of the input (cp)], and the AND circuit (43b) The other input terminal becomes "L". With this, the AND circuit (4
The output of 3b) becomes 'L'' and 1. Drive motor (21)
The reversal of is suspended.

Here, even if the microswitch (SW4) In bouncing occurs and turns on and off repeatedly, the output (Q) of the flip-flop (47tl) remains at L, so the AND circuit (43b) keeps it at "L". Without output, the drive motor (21) will not rotate again.

Next, when the above switch (SWl) is turned on and the same-size copy is selected, the output port ■ becomes high, and the output port ■
becomes "L", the output of the OR circuit (50) becomes 'L', and as mentioned above, one input terminal of the AND circuit (43a) becomes "L", and the input (CL) of the flip-flop (47a) becomes "L".
) is #L”, input (D) is “H”, flip-flop (
47b) input (D) is L”, input (CL) is II
It becomes Hu. Also, II H+1 is input from the output port ■ to the other input terminal of the AND circuit (48b), and the micro switch (SWa) is off and II H+1 is input to the other input terminal of the AND circuit (48b).
Since "H" is input at Ln, "FI" is output to the other input terminal of the AND circuit (43a).At this point, the microswitch (SWa) is off and the flip-flop (47a) input (PR)
) is II L n, and the output (Q) outputs +1 H++ from one input terminal of the AND circuit (43a).As mentioned above, the AND circuit (48b) outputs II Hn, so the AND The circuit (43a) will output II Hn. Also, the AND circuit (43b) will not output II H11 because one input terminal receives II L ++ of the OR circuit (a).

As a result, the drive motor (21) rotates normally, the lens unit 11) moves to the same magnification position, and the microswitch (SWa) is turned on. Due to this ON signal, as mentioned above, when the input (cp) of the flip-flop (47a) rises, the output (Q) inverts the state of the input (D) and outputs "L", and the AND circuit (43a) outputs "L". ”Next 1.
t@=b The normal rotation of the motor (21) is stopped.

Even if bouncing occurs in the micro switch (SW3) and "H" is output from the AND circuit (48a), the output (
Q,) holds "r-" L, the AND circuit (43a) does not output II Hn, and the driving motor (21)
will not rotate again.

On the other hand, while the lens unit (1) is moving, the output (
0, ) are both "H", and this signal is input port ■.

(2) is input, and the microcomputer program puts the copying/pulling into a wait state.

In addition, in the present invention (herein, to change the reduction magnification, simply move the stopper member (], Ob) to the desired position, for example g2
The position may be changed to the position indicated by the two-dot chain line in the figure. In this case, drive boolean 20j, pulley (22a), (22b), etc.
There is no need to change the control circuit.

As is clear from the above description, the present invention has a plurality of stopper members provided on the reciprocating path of the optical member to stop the optical member at a desired position selected by the selection signal generating means. With the stop E, one of the pulleys provided at both ends of the reciprocating direction of the optical member is made to swing, this swing is detected, and the driving force of the drive pulley is cut off, and the next selection signal is Since the rotation drive is held in the 1-state until the rotation drive is stopped by the control means, it is only necessary to prepare one type of stop sub-leg system regardless of the number of changes in the copying magnification, and the stop position can be adjusted. It is only necessary to use two detection means for detecting the swinging of a pair of pulleys, and the stop position can be easily adjusted independently of the stopper member and the swinging detection member. Even if bouncing occurs in the floating detection member after the member stops at a desired position, rotation of the drive booth can be prevented reliably.

[Brief explanation of drawings]

The drawings show an embodiment of the drive control mechanism according to the present invention, and FIG. 1 is a perspective view, and FIG. 2 is a plane 1-' showing the same magnification stop position.
Fig. 3 is a right side view thereof, Fig. 4 is a plan view showing the reduction stop position, Fig. 5 is an exploded perspective view of the auxiliary lens-equipped boat structure,
FIG. 6 is a control circuit diagram. (1)...Lens unit, (6)...Guide shaft,
(ioa). (10b)...stopper member, tlω...wire,
(2ol...drive pulley, (21+-...drive motor, (22a), (22b)...pulley, (5)...plate is IQ, (47a'), (47b)...flip 7o
TS7', (SWI), (SW2)...Spin f for magnification selection, (SW3), (SW4)...Micro switch (swing detection member).

Claims (1)

[Scope of Claims] 1. An optical member supported so as to be capable of linear reciprocating movement, and a pair of pulleys provided at both ends of the optical member in the reciprocating direction so as to be swingable and movable on a plane parallel to the movement path. , a drive pulley that can be driven in forward and reverse rotation and is disposed between the two pulleys, and the optical member l that is wound around both the pulleys and the drive pulley.
A biasing member that biases both pulleys in a direction that tensions the wire, and a return aperture provided on the optical member movement path to stop the optical member at a desired position. . . . a stopper member, a swinging interlocking member for detecting the swinging of both pulleys, a selection signal generating means for selecting a desired position of the optical member, and a selection signal from the generating means. The driving pulley is rotationally driven to move the optical member to a selected desired position, and the swinging of the pulley due to the contact of the optical member with the stopper member is detected by the floating detection member, and the driving pulley is rotated. In addition to stopping the drive, the next option is to stop the rotation drive until a signal is issued, and to control the drive so as to maintain the stop state. Motion control structure for optical components. 2. A drive-side mechanism for an optical member in a copying machine according to claim 1, wherein the optical member is a lens unit.