JPH02205833A - Optical device equipped with mechanism for preventing vibration during transportation of copying machine - Google Patents

Abstract

PURPOSE:To protect a mirror unit from impact arising from vibration, etc., by allowing a turn preventing member to abut on a link body in a position in which a contact piece abuts on the highest part of a cam part. CONSTITUTION:A lens unit 51 is interlocked with the mirror unit 61 through the link body 71, and both units are fixed in their prescribed positions in response to a set object magnification. A lens stopper 100 prevents an L-shaped link 72 from turning clockwise at a magnification at which the contact piece 75 abuts on the cam surface 55c, but it does not interrupt the counterclockwise turning of the link 72. The optical device is transported with the contact piece 75 abutting on the cum surface 55c, that is, an unmagnified position. In such a way, the clockwise turning of the link body is prevented, whereby the contact piece fitted to one end of the link body in the unmagnified position is prevented from moving away from the cam part. Moreover, the vertical move of the mirror unit abutting on the link body is suppressed, and the mirror unit is protected from impact arising from vibration when it is transported.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an optical device equipped with a vibration prevention mechanism during transportation for a copying machine that has a variable magnification function that can enlarge or reduce an original for copying. It is.

[Prior Art] As a copying machine equipped with a variable magnification mechanism, there is one described in the Meishun document and drawings attached to the application form of Japanese Patent Application No. 1983-212831 previously filed by the present applicant.

[Problems to be Solved by the Invention] However, in the variable magnification mechanism of this copying machine, there is a margin for the movement range of the mirror unit that contacts the link body, so the mirror unit may move up and down due to vibrations etc. during transportation. As the link body in contact with the mirror unit is rotated, the contact piece that cooperates with the cam part at the other end of the link body separates from the cam part, and as a result, the collar part of the contact piece and the cam part are separated. Due to the contact, the conjugate length of the optical system is distorted, resulting in a blurred image.

Furthermore, since the mirror unit can be moved up and down, there is also the drawback that shocking force is easily applied to the mirror unit.

The present invention has been made to solve the above-mentioned problems, and its primary purpose is to prevent the contactor attached to one end of the link body from separating from the cam part by preventing rotation of the link body. In addition to the first purpose, the second purpose is to suppress the vertical movement of the mirror unit that comes into contact with the link body, thereby protecting the mirror unit from impact forces caused by vibrations and the like.

[Means for Solving the Problems] In order to achieve this object, an optical device including a vibration prevention mechanism for a copying machine according to the present invention rotates to a position where the contact contacts the link body at the highest portion of the cam portion. A prevention member is provided.

[Function] According to the present invention having the above configuration, the rotation prevention member has the following features:
The contact comes into contact with the link body at the position where it comes into contact with the highest part of the cam part, and prevents the link body from rotating more than necessary.

[Example 1] Hereinafter, an example embodying the present invention will be described with reference to the drawings.

FIG. 2 is a schematic cross-sectional view of a copying machine that uses a photosensitive and pressure-sensitive method and has a variable magnification function that allows full-color copying and that allows setting of five levels of magnification, including the same magnification. Incidentally, photosensitive paper (consisting of microcapsule paper and color developer paper) that enables such copying has been proposed in Japanese Patent Application Laid-Open No. 58-88739, and will not be described in detail here.

The copying machine 40 is composed of an original platen glass 2 whose top plate is a transparent glass having a substantially rectangular shape, and an original platen cover 1. A desired original can be placed face down on the original platen glass 2. Can be done.

A light source consisting of a halogen lamp 3 extending in a direction perpendicular to the direction of movement of the document table glass 2 and a semi-cylindrical reflecting mirror 4 disposed to surround it is fixed to the upper right side of the copying machine 40. Light is irradiated in a line toward the document table glass 2. Therefore, the light emitted from the halogen lamp 3 can sequentially illuminate the entire surface of the document table glass 2 from the left end to the right end by moving the document table glass 2 in the left-right direction. The light emitted from the light source passes through the transparent original platen glass 2 and is reflected by the original placed on it. A document table cover 1 that covers the upper surface of the document document table 2 is provided.

In addition, in order to use the light emitted from the halogen lamp 3 to irradiate the original with high efficiency, a beam flap 5 is provided to the left of the light source to reflect light that is not directed directly toward the original and use it to irradiate the original. .

A fan 6 and a louver 7 are provided to the right of the halogen lamp 3 to take in air from the outside, so that air can be efficiently applied to the document table glass 2.

Light emitted from the halogen lamp 3 and reflected by the document placed on the document table glass 2 passes through the filter 8 and enters the lens 9 . The filter 8 is for changing the light transmission characteristics according to the sensitivity characteristics of the microcapsule paper 37 and adjusting the tone of the copied image. Lens 9 is
The lens unit 51 is attached to the lens frame 52 so as to allow minute angle adjustment with respect to the optical path.

The light focused by the lens 9 is turned 180' by two reflecting mirrors 11, and is imaged on the microcapsule paper 37 closely positioned below the exposure table 19. The two reflecting mirrors 11 are fixed to two mirror mounting plates 12a and 12b to form a mirror unit 61.

On the other hand, a long microcapsule paper 37 is wound around a cartridge shaft 14 and housed in a removable cartridge 13 disposed below the platen glass 2. One end of the paper is connected to a large number of rollers and It reaches the winding shaft 25 via the developing device 20.

That is, the microcapsule paper 37 coming out from the lower part of the cartridge 13 is transferred to the feed roller 15. After passing under the exposure table 19 guided by the tie roller 17, the pressure developing device 20
is supplied to Thereafter, the microcapsule paper 37 that has passed through the pressure developing device 20 is guided to a peeling roller 23 and a meandering adjustment roller 24, and then wound onto a winding shaft 25. After leaving the cartridge 13, the unexposed microcapsule paper 37 is maintained in an unexposed state by the light shielding cover 16.

The conveyance speed of the microcapsule paper 37 is controlled to be constant by the capsule paper feed roller 22, and also corresponds to the moving speed of the document platen glass 2, so that the microcapsule paper 37 is Latent images of predetermined lines of the document are sequentially formed.

Further, a color developer paper cellar h32 that accommodates a cut paper type developer paper 38 is provided below the pressure developing device 20, and the developer paper 38 is taken out one by one by a half-moon roller 33, and the color developer paper 38 and the color developer paper roller 34 and After the leading end is aligned by the registration gate 35, the paper is transported to the paper transport entrance of the pressure developing device 20.

Therefore, the pressure developing device 20 includes the microcapsule paper 37.
The color developer paper 38 and the color developer paper 38 are supplied in a state where they are in close contact with each other and are integrated. The pressure developing device 20 is composed of a small diameter roller 21 and a backup roller 31. Microcapsule paper 3
Microcapsule surface and color developer paper 38 on which latent image No. 7 is formed
The roller 21 is sandwiched between the small diameter roller 21 and the backup roller 31 and pressure is applied thereto, with the color developer coated surface thereof being in contact with each other on the inside. This pressure destroys the unexposed microcapsules and forms an image on the developer paper 38.

The microcapsule paper 37 and the color developer paper 38 that have come out of the pressure developing device are conveyed by the capsule paper feed roller 22, and the microcapsule paper is moved upward by the peeling roller 23, and the color developer paper 3 is transported by the peeling roller 23.
8 are orthogonally separated.

After the developing paper 38 is accelerated in color development and an image is formed on it by the heat fixing device 39, it is delivered to the paper discharge tray 27 with the image side facing up. The heat fixing device 39 includes a hollow heat roller 29 having a heater 30 therein, and a developing paper feed roller 28.

The separated microcapsule paper passes through a meandering adjustment roller 24 and is wound around a winding shaft 25.

The operation of the device configured as described above will be explained below.

First, open the document platen cover 1 and place the original on the document glass 2, and then press the start button (not shown).The document glass 2 will move to the right and the left edge of the document glass 2 will become the light source. Stop at a position facing the

Thereafter, with the halogen lamp 3 turned on, the document table glass 2 is moved to the left. halogen lamp 3
After being reflected by the original, the light irradiated from the filter 8 passes through the filter 8.
．． After passing through the lens 9 and being reflected by the two reflecting mirrors 11, the microcapsule paper 3 is placed below the exposure table 19.
7.

At this time, the microcapsule paper 37 is placed on the document table glass 2.
The image on the document is formed as a latent image on the microcapsule paper 37 because the exposure table 19 is moved downward to the left at a speed corresponding to the moving speed of the microcapsule paper 37 .

As the document platen glass 2 moves to the left, the half-moon roller 3
3, the developer paper 38 is taken out from the developer paper cassette 32, and is supplied to the pressure developing device 20 in a superimposed state with the microcapsule paper 37 of the exposure flow, and the latent image on the microcapsule paper 37 is developed. The image is then transferred onto the color developing paper 38.

Thereafter, the developing paper 38 is thermally fixed by a thermal fixing device 39 and then discharged from the copying machine 40 . On the other hand, the microcapsule paper 37 that has passed through the pressure developing device 20 is sequentially wound around the winding shaft 25.

When the right end of the document platen glass 2 finishes moving to a position facing the light source, copying of the document is completed and the halogen lamp 3 is turned off.

Structure and operation of variable magnification mechanism> FIG. 3(a) shows the details of the lens unit 51 and mirror unit 61 in the schematic cross-sectional view of the copying machine 40 shown in FIG. is its plan view, and FIG. 3(C) shows the lens unit 51 and mirror unit 61.
This shows the link body that links the .

The lens frame 52 that constitutes the lens unit 51 is
As shown in FIG. 3(b), it is formed into a substantially U-shape, and the
A rack 54 and a cam body 55 are fixed to one end edge 52a, and a rack 54 is fixed to the other end edge 52b.

A substantially V-shaped groove 58 is provided in the center of the lens frame 52.
Two positioning plates 58 having a diameter a are fixed in the optical axis direction, upper and lower, and the outer periphery of the lens 9 is brought into contact with the groove part 58a, and the lens 9 is fixed by the lens band 53 between the two positioning plates 58. ing.

Two sets of positioning pins 57 and a solenoid 56 for driving the positioning pins 57 are fixed to the lens frame 52 via a support member 60 slightly closer to the center than both end edges.

3 (
a) As shown in the figure, vertically extending guide portions 52c and 52d are provided, each of which is connected to the frame 4.
A lens arbor 45 fixed to the frame 44 is inserted through the lens arbor 45, and the lens unit 51 is supported to be movable up and down with respect to the frame 44 by this lens arbor 45 and a rotation prevention mechanism 59 provided at the other end edge 52b. ing.

As shown in FIG. 3(a), as the lens unit 51 moves in the vertical direction, the cam body 55 moves its contact portion with a contactor, which will be described later, in a direction perpendicular to the optical axis direction, corresponding to the copying magnification. It has cam surfaces 55a to 55e that change in five stages.

The frame 44 has positioning pins 5 for the lens unit 51 at positions determined by each copying magnification.
Positioning holes 44a to 44e, through which the positioning pins 57 are inserted, are provided in accordance with the position 7.

A drive section 81 that drives such a lens unit 51 includes a pulse motor 82 and a gear train.

A pinion 83 of a pulse motor 82 fixed to the frame 44 first transmits rotation to a spur gear 84 fixed to a gear shaft 85 rotatably supported by the frame 44 . Two small gears 86 are further fixed to the gear shaft 85, and these small gears 86 are connected to two idle gears 87 rotatably supported by the frame 44.
is rotated, and the lens unit 51 is moved in the vertical direction by the two racks 54 that mesh with this.

As shown in FIG. 3(a), the mirror unit 61 has two reflecting mirrors 11 fixed at both ends to two mirror mounting plates 12a and 12b. Of these two mirror mounting plates, the mirror mounting plate 12a on the near side shown in FIG.
An edge portion 62 through which the mirror mounting plate 46 fixed to the
．． 63a is provided. Further, the mirror mounting plate 12b on the other side of the illustration in FIG. 3(a) is provided with a rotation prevention mechanism (not shown) and an edge portion 63b that matches the lower edge portion 63a of the mirror mounting plate 12a. There is. This mirror unit 61 is biased downward by biasing means such as a spring (not shown).

In the link body 71, as shown in FIG. 3(C), an L-shaped sunk 72 and a sub-arm 73 are fixed to a link shaft 74, and a contactor 75 is attached to one end of the L-shaped sunk 72. A push-up roller 76 is rotatably supported at the other end of the link 72 and the tip of the sub-arm 73, respectively.

As shown in FIGS. 3(a) and 3(b), the link body 71
is attached to the frame 44 so as to be rotatable about the link shaft 74. As shown in FIG. 3(a), the link body 71 is moved counterclockwise around the link shaft 74 by the two push-up rollers 76 coming into contact with the end edges 63a and 63b of the mirror unit 61. The contact 75 is urged to rotate and is always in contact with the cam body 55.

As shown in FIG. 1, the lever stopper 100 is an abbreviated member that is attached to the frame 44 with screws 101.
The mold sink 72 is positioned so as to prevent the contact 75 from rotating clockwise from the position where it contacts the highest cam surface 55c of the cam body 55 (see FIG. 3(a)). . Further, the mounting hole 102 for mounting the lever stopper 100 on the frame 44 has an oval shape to enable adjustment.

Furthermore, the lever stopper 100 includes a stopper sponge 1.
03 is pasted, and actually the stopper sponge 10
3 comes into contact with the L-shaped sunk 72.

The operation of the copying machine configured as described above will be explained below.

FIG. 3(a) shows a state in which the contact 75 is in contact with the cam surface 55c of the cam body 55 due to the set copying magnification. At this time, the positioning pin 57 shown in FIG. 3(b) is pushed out by the solenoid 56 and passes through the positioning hole 44c of the frame 44, and
is positioned securely in the vertical direction.

From this state, the copy magnification is changed to, for example, one of the five copy magnifications set in the copying machine according to this embodiment.
To set the copying magnification at which the lens unit 51 descends the most, first, the positioning pin 57 is pulled out from the positioning hole 44c by the solenoid 56 to enable the lens unit 51 to move in the vertical direction, and then a pulse controlled by a control circuit (not shown) is applied. The motor 82 moves the lens unit 51 downward to a predetermined position via the rack 54 via the gear train, and the positioning pin 5 is moved by the solenoid 56.
7 is pushed out and passed through the positioning hole 44a, and the lens unit 51 is fixed at a position corresponding to a predetermined copying magnification.

At this time, as the lens unit 51 moves, the cam body 5
5 also moves, and the contact 75 moves from the cam surface 55C to the cam surface 5.
5b and comes into contact with the cam surface 55a. With such a change in the position of the cam surface, the contactor 75 moves stepwise to the left, and the link body 71 rotates counterclockwise about the link shaft 74. Then, the push-up roller 76 attached to the L-shaped sunk 72 and the sub-arm 73 moves downward, and the mirror unit 61 also descends.

In this way, the lens unit 51 and the mirror unit 61 are interlocked via the link body 71 and fixed at a predetermined position in accordance with the set copying magnification.

The lever stopper 100 prevents the L-shaped link 72 from rotating clockwise at a magnification where the contact 75 comes into contact with the cam surface 55c, and prevents the L-shaped link 72 from rotating counterclockwise at other magnifications. Do not prevent it from moving.

Further, if the transportation is carried out at the same magnification position, that is, the position where the contact 75 abuts against the cam surface 55c, the L-shaped sink 72 and the mirror unit 61 that abuts thereon are generally fixed even during transportation.

[Effects of the Invention] As is clear from the detailed description above, according to the present invention, by preventing the link member from rotating clockwise, the contact attached to one end of the link member at the same magnification position is This has the effect of preventing the child from separating from the cam portion, and at the same time, suppresses the vertical movement of the mirror unit that comes into contact with the link body, and has the effect of protecting the mirror unit from the impact force caused by vibrations caused by transportation.

[Brief explanation of the drawing]

1 to 3 show embodiments embodying the present invention, FIG. 1 is a perspective view of a rotation prevention member, and FIG. 2 shows a copying machine embodying the present invention. A schematic sectional view, FIG. 3(a) is a front view showing the variable magnification mechanism of the copying machine, and FIG.
b) is a plan view showing the magnification changing mechanism, and FIG. 3(C) is a perspective view showing the link unit. In the figure, 40 is a copying machine, 51 is a lens unit, 55 is a cam body, 61 is a mirror unit, 71 is a link body, 75 is a contact, 81 is a drive unit, and 100 is a rotation prevention member.

Claims (1)

[Claims] 1. A lens unit that is driven by a drive source and linearly moves within a predetermined range in the optical axis direction, and a link body that rotates with one end facing the lens unit. A cam portion is provided on one of the link body and the lens unit, and a contactor that cooperates with the cam portion is provided on the other, and a mirror unit that abuts is provided on the other end of the link body. In a copying machine that is linearly moved in the optical axis direction in synchronization with the movement of a lens unit, a rotation prevention member of the link body prevents a cam or a contact of the link body from coming off from the other contact or cam. An optical device equipped with a vibration prevention mechanism during transportation, characterized by comprising: