JPS5885458A - Copying device of multistage variable magnification - Google Patents

Abstract

PURPOSE:To correct the nonlinearity of the extent of movement of a lens in the direction of the optical axis and the direction orthogonal to the optical axis in case of the change of magnifications, by using a cam. CONSTITUTION:For the purpose of matching corners of an original to specific corners of a platen glass to position the original, it is necessary that a lens 6 is displaced not only in the direction of the optical axis but also in the direction orthogonal to the optical axis in case of conversion of magnifications. It is sufficient if thelens 6 is moved along a rail 33 at an angle theta to the optical axis; but the movement is slightly developed from the linear relation, and therefore, a cam plate 32 is used and the lens 6 is moved along this cam plate 32 to correct this deviation. A scanning mirror is displaced in the direction orthogonal to the optical axis also in accordance with this movement by the same driving source to prevent the deviation between optical paths of the lens and the mirror.

Description

DETAILED DESCRIPTION OF THE INVENTION This is an electronic copying machine that performs the above magnification conversion.

In order to perform complete corner registration on either the left or right side of the leading edge of the document, it is necessary to move the lens in the optical axis direction according to the magnification conversion, and also move it in the width direction perpendicular to the optical axis. The change in optical path length associated with magnification conversion was accomplished by moving the mirror.

This relationship will be explained in principle.

Distance between the original and the lens k a *If the distance between the lens and the photosensitive drum is b, the following equation holds true.

(f is the focal length of the lens) Further, the following relationship exists between the magnification im and the n, b, a and b.

b=ma・・・・・・
(2) (1), (2) formula! :'i a&go is expressed by the following equation 1,ru.

m+1 a - f ・・・・・・・・・
(3) Displacement of the lens in the optical axis direction due to magnification conversion) ゛ゲ△y, corner registration + displacement part of the lens in the direction perpendicular to the optical axis for performing corner registration + 1 stroke,
In the case of a machine or camera in which the optical path length is corrected by the optical system between the lens and the original ψ], equations (5) and (8) hold true (see Figure 1,
In the diagram, θ is the tilt shift of the lens relative to the optical axis X.
+ angle).

△Y = 1)1'+b2 ・・・・・・
(4) (b is the distance between the photosensitive drum and lens before zooming; b2 is the distance between the photosensitive drum and lens after zooming) (
From formula 3), △Y −(mt + m2) f ・---(5)(m
, is the magnification before zooming, 1l12 is the magnification after zooming) and 3
From the law of similarity of squares (W is in an h-sized original) (6) From equation (7), the total optical path length before magnification is a1+l) Is l the magnification?
& changes to a2+b2, and the positions of the original and photoreceptor remain unchanged 3-, so 4' is changed to the moving mirror (second and third mirror) to change the total optical path length ((a2+b2) (al +bl
) '/) It will not spread unless it is moved by half, and as a result, the adjustment displacement amount of the moving mirror will be △2.

As described above, each displacement amount △X, △ of the lens and mirror
y, △Z is expressed by equations (5), (8), and (9).

Therefore, it is clear that the displacement amount △y of the lens in the optical axis direction and the displacement amount △X in the direction perpendicular to the optical axis direction are not in a proportional relationship. is the corner registration when selecting intermediate magnification!
・If there is no correction based on equations (5) and (8) for the ration, fI- must be corrected.

However, in the past, the position of the lens was adjusted using a mechanism as shown in Figure 21, and the position of the mirror was adjusted using a mechanism as shown in Figure 3. However, the mechanism that had made each of them create a separate 1c structure had become complicated.

The lens position adjustment structure shown in FIG. 2 will be explained in detail. Lens 01 is θ with respect to the optical axis X in the horizontal plane.
A wire 04, which is freely supported along a guide rail 02 that is inclined by 0.5 degrees and has both ends tied to a stand 03 that is integrated with a lens 01, is wound around a pulley 06 that is integrated with a rotor of a motor 05. Kita 11? lens position corresponding to the rate,
At the lens position corresponding to the small magnification (j, i), place the identification stopper 0 on the pin 07 that is integrated with the stand C.
8a, 081) is installed inside Wa 1, in which 1't: fl (
1) At the lens position corresponding to the three stages of magnification, press the pin 07.
A movable stop bar 9 protruding from the Q9C1 is provided so as to be freely retractable by means of a solenoid 010.

In the lens position -14 adjustment mechanism shown in FIG. 4t in the direction perpendicular to the optical axis; Movement: △X and the bottom are not in a proportional relationship, so when setting the standard maximum and minimum magnification,
Accurate corner registration is performed.
Stalled at the middle three magnification settings.

Corner registration becomes distorted. Furthermore, since the lens O1 is mechanically stopped by the stoppers 08 and 09, there is a risk that an impact may be generated on the support system of the lens O1, causing it to become distorted.

The mirror position W14 adjustment mechanism shown in FIG. 3 will be specifically explained. A light source lamp 012 is placed below the old platen glass 1 in a direction parallel to the glass 011.

1st mirror 013. Second mirror 014. Third mirror 01
A lens O1 and a fixed mirror 016 are arranged parallel to the platen 0 at a 9° angle.
One of the manuscripts on 11 has these optical systems 013.014,0
15.01.016 to the photosensitive drum 017-H.

Further platen 0 ], 1 below 1; l1iIvAI
Drive shaft 018 and follower shaft 0 on l]
, 9 are rotatably arranged parallel to each other, and a drive pulley 020 and a follower pulley 021 are integrally fitted to the cylindrical shafts o18 and 019, and a clutch mechanism (not shown) is formed. Both pulleys 020 through
．． Boo IJ-024, 025 with half the diameter of 021 is 1ρ
It's dressed up. Further the said-Pulley 020
Cable 022 is spanned over 21 n, and the same cable () 2
2, the light source lamp 012 and the first mirror 013 are integrated into one unit ζfI-, drive shirt) 018 and optical system gηTl
11 motor 023 vC connection 02.I, 025VC cable 7'/shi 026 is spanned, and the second motor is connected to the same cable 026. Third mirror 014.
015 is integrally viewed at 11.1°, and during copying operation, the optical system; The light source lamp O12 and the first mirror 013 straddle the left side and the right side V? due to the forward and reverse rotation. -Hyperactivity and ＼moni, ke;2. Self-73 mirror 01.4,015 It is designed to move to the right or left at half the speed of the mirror.

Furthermore, the cable 026 is connected to the adjustment pulley 027.
028VC is also bridged 5. same) il, -1jiz 7'
-Lee-028 is integrally fitted to the adjustment shaft 029.
, mirror position setting disk 0 integrated with the adjustment shaft 029
When 30 is fitted, both 5 and 7 are connected to the mirror adjustment motor 032. At the time of magnification conversion, the clutch 1 (not shown) is removed, and the mirror W, 1 is adjusted. Motor 032
By driving the adjustment pulleys 027, 028
are reversed as appropriate, and in the same room: 4 sets 1. J-027,
028 rotates, the second. 3rd mirror old 4,015
is moved to the left or right as appropriate. Then, corresponding to the required magnification, the solenoid 033 is activated at the same location as f(4).

Stopper 034 is swung by the same solenoid 033.
is the mirror position setting circle: 1 Predetermined pin 031 on temporary 030
The second mirror 014, the third mirror 014,
The position of 015 is adjusted to 'A' in accordance with the magnification.

Also in the mirror position adjustment 1-attack shown in FIG. I was used to getting a @ strike on the 3rd mirror 014.015 and getting upset.

Moreover, in the past, lens position adjustment, mirror position adjustment, and separate adjustment of FM "d'IIJI source 05,0
32, the structure was complicated and the cost was high.

The present invention relates to an improvement of a multi-stage variable 8-magnification type copying device that overcomes such difficulties, and is directed to a multi-stage variable-magnification type copying device that has a corner registration function and performs magnification conversion in three or more stages. Lens position adjustment using a lens correction cam to correct the nonlinear relationship between the amount of movement of the lens along the optical axis direction and the amount of movement of the same lens along the direction perpendicular to the optical axis direction due to magnification conversion. The self-portrait position adjustment mechanism is equipped with a lens position adjustment mechanism for adjusting the position of the mirror, and a mirror position adjustment mechanism 44 for adjusting the position of the mirror in conjunction with magnification conversion using an all-mirror correction cam. The purpose of this is to have a simple structure that allows for easy magnification conversion of three or more steps without disturbing the corner registration. The main point is that we provide a full range of low-cost copying equipment.

As mentioned above, the present invention provides a multi-stage, y-magnification type copying device that has a corner registration function and performs magnification conversion in three or more stages (movement of the lens along the optical axis direction accompanying magnification conversion)1. Lens position adjustment 5 to adjust the position of the lens in which the lens correction cam is used to correct the non-continuous relationship between the lens and the direction of the optical axis of the same lens. And, the position of the mirror as the magnification changes: 9
・Mirror position performed by the i-bola correction cam; Since the lens position>Jr, adjustment and mirror position adjustment are performed at the same time, the required q) step of magnification conversion can be easily performed.

In addition, in the present invention, the lens position/γ'' adjustment mechanism and the mirror position; 11. The cost will be significantly lower.

Furthermore, in the present invention, the non-linear relationship between the amount of movement along the optical axis direction of the lens due to magnification conversion and the amount of movement of the same lens along the direction perpendicular to the optical axis direction is determined using a lens correction cam. When performing special two-step magnification conversion and other (/,)-step magnification conversion, the correction cam is set to J: the amount of movement in the lens optical axis direction. If the amount of movement in the direction perpendicular to , is corrected by il'', even after any magnification of 4 (4), copying can be performed without any deviation in registration.

The embodiments shown in FIGS. 4 to 9 will be described below.

First, as shown in FIG. 4, below the platen glass 1, a light source lamp 2. 1st mirror 3. 2nd mirror 4. The third mirror 5 is supported so as to swing back and forth 8v1, and the lens 6 is parallel to this.
A fixed mirror 7 is provided, and the image of the document 9 on the platen L is formed on the photosensitive drum 8 through the optical system 3°4, 5.6.7i. It has become so.

A drive shaft 10 and a follower shaft 10, 11 are arranged parallel to each other and rotatable on both sides below the platen l. When they are fitted together, pulleys 16 and 17 having half the diameter of the two boots IJ-12 and 13 are fitted through a clutch device (not shown).

Furthermore, a cable 14 is spanned across both pulleys 12 and 13, and a light source lamp 2 and a wrapped mirror 3 are integrally connected to the cable 14. A drive shaft 10 is connected to an optical system via a speed change mechanism (not shown). A cable 18 is connected to the mechanical motor 15, and a cable 18 is spanned over the pulley 16% 17, and the cable 18IK is connected to the second and third mirrors 4 and 5, and during the copying operation, When the clutch image structure (not shown) is set to the connected state, the light source lamp 2 and the first mirror 3 When is moved to the left or right, the second . 3rd mirror 4.5
It is designed to move in sync with the smoke at half the speed of a cigarette.

A mirror position adjustment mechanism for adapting to changes in optical path length due to 1 magnification conversion will now be described. The cable 18 also spans over adjustment pulleys 19 and 20, and the adjustment pulley 20 (l'' I is connected to the adjustment shaft 21 at a low level, and the mirror A'VX it, r! + gear 22 is integrally connected to the same shaft 21. It's stuck in.

Further, as shown in FIG. 6, the mirror, drive T11υ gear 22, and segment gear 2
4 and is pivotally supported at the other end of the segment gear 24.
The 7V cam follower 25 has a coil spring attached to the mirror J 1" at cam 26. Furthermore, the mirror drive cam 26 is fitted integrally with a worm wheel 28, and the worm wheel 28 is a worm integral with the rotation shaft of the adjustment motor 30. 29 is engaged,
The training motor 30 is rotated by the worm 29.

Worm wheel 28, mirror 1 (pivotal force), 261
Cam follower 25, segment gear 24, idler gear 23.

The mirror IM WQ is transmitted to the adjustment pulley 20 via the WQ gear 22 and the adjustment shaft 21, and the adjustment pulley 20
is rotated as appropriate to adjust the position of the second and third mirrors 445.

On the other hand, a lens position adjustment mechanism that adjusts the position of the lens 6 (moves along a plane parallel to the platen glass 1) accompanying magnification conversion will be described.

On the supporting plate 31, which is installed parallel to the platen glass l, a cam plate 32 is oriented in a direction inclined by θ with respect to the optical axis X of the lens 6 along a plane parallel to the platen glass l.
The lens guide rod 33 and the block guide rod 35 are provided, and the cam plate 32 and the block guide rod 35 are integrally aligned with the support plate 31, so that the lens guide rod 33 maintains the entire inclination angle θ. The support plate 31 is attached to the cam plate 32 via four parallel links 34 so as to move toward and away from the cam plate 32.
installed on.

The cam portion 32a of the naorimu plate 32 is as described in (5) and (8) above.
It is formed into a shape that satisfies all the expressions.

A cam follower 37 that contacts the cam portion 32 a of the cam plate 32 is pivotally attached to one end of the lens mount 36 that supports the six lenses, and a groove 39 that slidably fits into the shaft 38 of the cam follower 37 is attached. A roller 41 that contacts the straight portion 32b of the cam plate 32 is pivotally mounted on the bridge part 40, and a tension coil spring 42 is tensioned between the lens mount 36 and the bridge part 40. 9. lens mount 3
6 can move along the cam 32a of the cam plate 32.

Furthermore, a guide groove 43 oriented in a direction perpendicular to the optical axis X is provided at the other end of the lens mount 36.
The rolling roller 44 that is fitted in is pivoted to the guide block 45! 1. The lens mount 36 is supported by the cam plate road and the registration guide rod 33, and the cam plate 32
When the block guide 45 moves along the cam portion 32a, the guide block 45 is guided by the block guide 35 and moves.

Furthermore, a roller 47 is pivotally attached to the tip of a leaf spring 46 protruding from the guide block 7I5, and a position plate 48 is disposed parallel to and in contact with the block guide rod 35. Astragalus 6 has a magnification of 0.
7.0.8.1.0.12.1.4 When the eaves is moved and adjusted, the roller 47 engages with the X-shaped recess 49 of the position plate L'-) 48 The lens 6 is then locked in a predetermined position.

Further, a microsinch 50 is attached to the position plate 48 so that when the roller 47 is engaged with the ■-shaped recess 49, it is pressed against the protrusion 45a of the guide block 45.

Therefore, the width U of the ■-shaped recess 19 and the guide block 4
The protrusion number 5 is 452 mm wide.

U≧■ It is set so that the following relationship holds true.

Also, the pulley 5 is placed on a line parallel to the block guide rod 35.
1.52 is the support plate 3] [Pivotally supported, pulley 51 is parallel to the optical axis and concentric f
A cable 55 is wound around a lens adjustment pulley 54 that is integrally connected to the pulley 51.
When the cable 55 is tied to the guide block 45 after being wrapped around the
2 and after winding the guide block 45Vc in sequence.
When the lens is rotated forward and backward, the guide block 45 moves back and forth along the block guide rod 35 via 55 cables. It has become so.

The mirror, drive cam 20, and lens adjustment pulley 54 are integrally connected to each other via a shaft 56, and a pin 57 is oriented in the diametrical direction and integrally penetrates the shaft 56, and the pin 57 is a worm. The fan-shaped notch 28a of the wheel 28 has a play of ψ to hold it together.

The embodiments shown in Figures 4 through 9 are as described above.
Therefore, when the maximum magnification is set to 14x, the lens 6 is located at the far left position as shown by the solid line in Fig. 5, and when set to the minimum magnification of 07x, In this state, the lens 6 is in the rightmost position as shown by the dot on the right side of FIG.

From the picture shown in the picture with a 1.4x magnification.

ν11 For example, if you change the magnification to 10 times, the motor 3 will be
0 begins to rotate, guide block 45q) tsu・l; bow 4
5 One piece 50 of the micro switch 50 with a in the center
a? The motor 30 is turned on until the pedal is pressed.

Two worms and a worm wheel 28 are generated by the rotation of the motor 30. Shaft 56 valves, mirror l, egg] cam 26 and lens 1. Adjustment pulley 54 rotates as one...
X-shape nl, cable 55, J:v guide block 4
5 is shown in Figure 5. When the whip is moved to the right, ＼ is also r, cam 26σ)
To rotation = J: ') *Cam follower 25. Segment gear 24. and lp' idler gear 23. mirror 5
When the adjusting boob I+-20 is rotated through the first gear 22, the second and third mirrors 4.5 are moved to appropriate positions through the cable 18.

When the removable piece 50a of the central re-micro switch 50 and the protrusion 45a of the entire guide block 45 step on it, the power supply circuit of the adjustment motor 30 is cut off, but the motor 30 and the CD rotor continue to rotate due to rotational inertia and the worm The wheel 28 rotates by inertia by an angle α to measure the size accurately.

Meanwhile, the roller 47 rolls on the slope of the v-shaped recess 49 of the position plate 48! ll get off.

Since the motor 30 and the worm wheel 28 have already completely stopped rotating, the shaft 56. Lens adjustment pulley 5
4 and the mirror drive cam 26 can be rotated by the cable 55 by an angle of ψ-α, and when the roller 47 is fitted into the ■-shaped recess 49 of the position plate 48.

The lens 6 and the second and third mirrors 4 and 5 are locked.

In addition, the movement of the lens 6 in the optical axis direction Movement △x-0,
Only 0833W can be adjusted depending on the shape of the cam plate 32(1) and the cam portion 32a.

In this case, the guide block 45 is the block guide rod 35
Relative movement (optical axis direction (perpendicular to
Old 1. Guided to a. ＾1 (Movement in the direction of the field X as indicated △
y and movement ΔX in the direction perpendicular to y can be compatible with each other.

Not only when changing the scaled magnification from 14 to 10,
Even when changing the magnification to a magnification of 1.2.0.8.0.7, the lens 6 has a
Regarding the angular direction, the position is adjusted so that the above (5) and (8) 2 are always erased and added, so at any of the 5 levels of magnification, the true image can be seen without creating image defects or blank areas. Corner registration is performed No. 1. Vine.

Furthermore, the position F113 of the lens 6 is adjusted and the second position is adjusted. No.: mirror 4.5 digit 1; adjustment barb, same adjustment motor;
Since both the lenses and mirrors can be adjusted at the same time, if the operations are simple, the lens adjustment and mirror adjustment can be carried out efficiently within a short period of time.

Furthermore, a single adjustment motor: one o vc from the lens 6
position adjustment and second. Since the positions of the third mirrors 4 and 5 can be adjusted, the structure becomes extremely simple and costs are reduced.

Matata @: Place female player in position play 1/48 ζf
L11 microsinch 50 is used to fit the V-shaped recess 10 into the roller 7I7 which is pivotally supported by the plate spring 46.
Because of this positioning, an ordinary blood flow motor or an AC reversible motor can be applied to the adjustment J cutting motor 30, and )-1] it is possible to perform all copies at a certain accurate magnification. This makes it possible to reduce costs.

In the embodiment, the microswitch 50 and the ■-shaped recess 49
Therefore, the position of the lens 6 can be set at all five levels, but if the conventional motor used for the adjustment motor 30 is replaced with a servo motor and a stepping motor, then
lens 6 and the second lens. No. Umira 4,5 all arbitrary places t
] Can be set.

A continuous variable magnification optical system can be constructed.

Hereinafter, the present invention has been described in detail with respect to an embodiment illustrated on the N side and an embodiment not shown in the drawings, but the present invention is not limited to such embodiments, and the present invention can be You are free to modify the syllables of the cast net as needed, within a range that does not deviate from your spirit.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram illustrating the principle of a copying machine that has a corner registration function and can perform multi-step magnification conversion. FIG. 3 is an explanatory diagram schematically illustrating a position adjustment mechanism and a mirror position adjustment mechanism. FIG. 4 is an explanatory diagram schematically illustrating an embodiment of a multi-stage variable magnification type copying apparatus according to the present invention, FIG. 5 is an enlarged plan view of the main parts thereof, FIG. 6 is a side view thereof, FIG. Fig. 8 is an enlarged plan view of the main part of Fig. 5, and Fig. 7 shows the completed positioning state.
The figure shows the entire state before positioning, and FIG. 9 is a view taken along the line IX-IX in FIG. 5. 1...Platen glass, 2...Light source lamp, 3...
・First mirror, 4... Second mirror 15... Third mirror, 6... Lens, 7... Fixed mirror, 8... Photosensitive drum, 9... Document, 10... Drive shaft. 1 follower shaft, 12...drive pulley-5
13・Fuorowap=I+-, 14...Cable, 15
・, Optical system drive motor, 16・Pulley, 17・・Pulley, 18・・Guple, 19・・Adjustment pulley,
20... Adjustment pulley, 21... Adjustment shaft, 22
... Mirror drive gear, 23 ... Idler gear, 2
・1... Segment gear, 25... Cam follower, 26... Mirror drive cam, 27. Coil spring, 28... Worm wheel, 29. Worm.
30... key] ν motor. 31 - Support plate, 32 - Cam plate, 3: Lens guide rod, 34 - Parallel link, 35 - Block guide rod, 36 - Lens mount, 37 Cam follower, 38 - Cam follower shaft , 39・Mizobe, 40
...The receiver is a piece. 41... Roller, l12... Tension coil spring, 43... Guide groove, 44... Roller, 45... Guide block, 46... Plate <4.47... Roller, 48...・Position plate. 49... ■-shaped recess, 50... Micro switch, 5
top pulley, 52 pulley, 53... pulley, 54
・・Lens style stone pulley, 55・・Cable, 56・
Shaft, 57 pins. Agent Patent attorney Nozomi Ehara 1 person 23- Figure 1 397-

Claims (1)

[Claims] Lens (1) Movement amount along the optical axis direction associated with 1 magnification conversion in a multi-stage variable magnification copying device that performs 3 or more magnification changes using corner registration Nonlinear M with a moving scene along a direction perpendicular to the direction
, person in charge? Lens position adjustment to adjust the position of the lens corrected with the lens correction cam and 1 magnification change!:
[The accompanying mirror position adjustment is performed using a mirror correction cam.The mirror position piece is fully equipped with a mirror extension structure, and both positions are adjusted between the two positions! ,!
N is the same, and (1) a multi-stage variable-magnification type copying device whose signature is that the position adjustment is performed at the same time at the source.