JPS5854373B2 - Copy machine drive device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive device for driving a part of an optical device or a document table in a copying machine to perform slit exposure. The present invention relates to a drive device that connects a part of an optical device or a document table to a cable that is endlessly wound around a cable, and causes the cable to travel back and forth.

In the typical prior art, a part of an optical device or a document table is connected to a chain, the chain is stretched between two pairs of sprocket wheels, and two electromagnetic clutches are attached to the sprocket wheels. During exposure, one of the electromagnetic clutches works to rotate the sprocket wheel in the normal direction at a relatively low speed suitable for exposure, and after the exposure operation, when part of the optical device or document mounting table reaches the end position of the travel path,
In order to return to the original rest position, the other electromagnetic clutch is used to reverse the rotation at a relatively high speed, thus achieving reciprocating motion.

Therefore, the exposure speed is constant for exactly half of the reciprocating travel path, and therefore, even after the exposure operation is completed, the exposure speed is maintained until the end position of the travel path is reached.

Therefore, there is a problem that copying takes a long time.

SUMMARY OF THE INVENTION Accordingly, the main object of the present invention is to provide a copying machine drive device that allows copying time to be shortened.

FIG. 1 is a perspective view of an electrostatic copying machine according to an embodiment of the present invention.

A transparent plate 4 on which a document is placed horizontally is provided at the top of the body 2.

The body 2 is provided with a document holding plate 6 for pressing the document onto the transparent body 4.

A paper feeding device 8 for feeding copy paper 20 wound into a roll (see FIG. 2) is attached to the machine body 2 as shown in FIG. Can you pull it out to the right in Figure 1?

The length of the copy paper ejected from the machine body 2 after copying is completed is determined by manually positioning the knob 10 protruding from the upper front of the machine body 20 in the left-right direction of the machine body 2, and adjusting the length corresponding to the left-right position of the knob 10. You can choose.

The number of copies of copy paper is set using the two-digit display tubes 12 and 14 provided at the upper front of the machine body 20.

In the copying operation, the number of copies to be made is set using the display barrels 12 and 14, and then the print button 16 is pressed.

The degree of shading of the image appearing on the copy paper can be set by a rotatable knob 18.

When copy paper becomes jammed in the machine body 2, a jam indicator lamp 19 lights up.

FIG. 2 is a simplified vertical sectional view of the copying machine shown in FIG. 1, viewed from the front.

A paper feeding device 8 housing a holder 22 holding a roll of copy paper 20, a copy paper cutting device 24, a charging device 26, an exposure device 28, a magnetic brush developing device 30, and a pressure fixing device 32. The copy paper conveyance path 36 is provided in this order.
is formed.

In the optical device 38 for forming an image of the document on the photosensitive copy paper 20 by the exposure device 28, the light projecting device 40 for projecting light onto the document through the transparent plate 4 includes an exposure lamp 42 and a reflective wall 44. The light projected onto the document from the projector 40 and reflected is transmitted from the reflecting mirror 46 to the movable reflecting mirror 48, the lens 50 having an in-mirror, and the reflecting mirrors 52 and 53, and then reaches the document in the exposure zone d. Form an image of

During a copying operation, the light projection device 40 and the reflecting mirror 46 are driven by the motor 54 and run in the direction of an arrow 88 from the left to the right in FIG.
8 simultaneously run from the left to the right in FIG. 2 at 1/2 the speed of the projector 40.

The light projecting device 40 and the movable reflecting mirror 48 are located at the rightmost end of the travel path in FIG. 2 at positions corresponding to virtual lines 56 and 58, respectively.

FIG. 3 is a simplified perspective view showing the projecting device 40, the reflecting mirror 46, and the moving device for the movable reflecting mirror 48, as seen from the rear of the copying machine.

Boots IJ 60 and 62 having horizontal axes are provided at both left and right ends of the fuselage 2 and spaced apart in the horizontal direction.

The light projection device 40 and the reflector 46 are fixed to a support 64, which is guided along guide members 66, 68 so as to be horizontally movable.

The support body 70 that supports the movable reflecting mirror 48 includes guides 72,
74 so that it can move freely horizontally.

A pulley 76 having a horizontal axis is pivotally supported on the support 70 .

One end of the wire 78 is fixed to the support body 64, and the wire 78 is wound about half a turn around the boo IJs 60, 62, and 76, and the other end 80 is fixed to the body 2.

Another wire 82 has one end fixed to the support 64 and is wound around the pulley 76 about half a turn, and the other end 82 is fixed to the support 64 .
4 is fixed to the fuselage 2.

Therefore, the support 64 is moved in the direction of movement 8 to the left in FIG.
8, the pulley 60 rotates in the direction of the arrow 86, and the movable reflector 48
It moves in parallel in the same movement direction 88 and at 1/2 the speed.

Referring again to FIG. 2, in the paper feeder 8, the holder 22
The rolled copy paper 20 is decurled by a guide roller 90 and guided to a copy paper cutting device 24 via a pair of paper feed rollers 92, 92'.

The copy paper cutting device 24 includes a rotary blade 96 and a fixed blade 98, and the copy paper 20 is cut by rotation of the rotary blade 96.

A pair of copy paper transport rows 2100° 100', which are constantly driven by a motor 54, are provided in the machine body 2 above the charging device 26 in the copy paper transport path 36.

The charging device 26 includes a fine wire corona discharge electrode, and the charging device 26 includes a fine wire corona discharge electrode.
A uniform electrostatic charge is applied on the zero photoconductive layer.

A pair of copy paper transport rollers 104 and 104' are provided below the exposure zone d of the copy paper transport path 36.

The pair of copy paper conveying rollers 104, 104' are constantly driven by a motor 54.

Movement of the light projector 40 during copying operation and exposure band d
The movement of the copy paper 20 on the copy paper conveyance path 36 in is performed in synchronization with the movement of the copy paper 20 on the copy paper conveyance path 36, and the image of the original is formed on the photoconductive layer of the copy paper 20 charged by the charging device 26, and the image corresponds to the image of the original. An electrostatic latent image is formed on copy paper 20.

A magnetic brush developing device 30 provided on the discharge side of the copy paper transport rollers 104 and 104' includes a cylindrical developer holding member 108 provided on the copy paper transport path 36 and magnetically holding powdered toner on the surface. has.

The peripheral surface of the developer holding member 108 and the copy paper 20 holding the electrostatic latent image are visualized by powdered toner while being moved at the same speed.

A toner replenisher 110 is provided on three sides of the developer holding member 108 to accommodate powdered toner for replenishment and to replenish the developer holding member 108 .

A guide roller 112 for guiding the copy paper is provided below the developer holding member 108.

A pressure fixing device 32 is provided on the discharge side of the magnetic brush developing device 30.
will be established.

This pressure fixing device 32 has a pair of pressure rollers 114 and 114' to which a predetermined pressure is applied.

When the copy paper 20 developed in the developing device 30 passes between the pair of pressure rollers 114 and 114',
The unfixed toner image on the copy paper 20 is fixed.

A pair of ejection rollers 118 are provided on the ejection side of the fixing device 32.
, 118' are provided to eject the fused copy paper 20 onto the copy receiving plate 122.

When the copy paper 20 is between the ejection rollers 118 and 118', the actuator 126 of the ejection detection switch 124 is swung by the copy paper 20, and the switching mode of the ejection detection switch 124 changes at the time of the swing.

FIG. 4 is a simplified rear view of the copier as seen from behind.

A sprocket wheel 130 is fixed to a rotating shaft 128 that is pivotally supported by the fuselage 2 .

The fuselage 2 has another Sugerocket wheel 1 spaced apart from it in the horizontal direction.
32 is pivotally supported.

A chino 134 is wound endlessly between these sprocket wheels 130 and 132.

The moving member 136 fixed to the support body 64 is connected to the vertically elongated hole 13.
It has 8.

The longitudinal hole 138 has a protrusion 14 fixed to the chino 134.
0 is inserted loosely.

Therefore, when the sprocket wheel 130 rotates in the direction of the arrow 86 and the chino 134 travels, the prongs 140
causes the moving member 136 to reciprocate horizontally.

The movable member 136 is stationary at a rest position indicated by a phantom line 142 when copying is stopped.

When the print button 16 (see FIG. 1) is pressed, the sprocket wheel 130 is rotationally driven in the direction of the arrow 86 by a drive device to be described later.

Therefore, the moving member 136 in the rest position 142 moves in the direction of the arrow 144.

Therefore, the moving member 136 is first detected by the paper feed detection member 146.

The paper feed detection member 146 is swingably supported by a swing shaft 148 on the body 2 in the middle of its longitudinal direction, and is swingably supported by a torsion spring (not shown) fitted into the swing shaft 148. A resilient force is applied around the moving shaft 148 in the counterclockwise direction of FIG.

The stopper 149 fixed to the fuselage 2 is connected to the swing shaft 146
limits the rotational displacement in the counterclockwise direction.

Only while the paper feed detection member 146 is being swung by the moving member 136, the paper feed roller 92' is rotationally driven.

Therefore, in the paper feeding device 8, the copy paper 20 is fed through the copy paper conveyance path 36, and the leading edge of the copy paper 20 located at the cutting device 24 is moved by the copy paper conveyance roller 100, which is constantly rotated by the motor 54. 100' and conveyed under pressure.

Therefore, while moving member 136 is moving in the direction of arrow 144, copy paper 20 continues to be fed even if paper feed detection member 146 is no longer oscillated.

FIG. 5 is a front view of the copying machine as seen from the front, with the front cover of the copying machine removed.

The knob 10 is horizontally displaceable along the guide rod 201.

The knob 10 is connected to a wire 213 stretched between the boo IJs 203 and 205.

FIG. 6 is a perspective view of a portion of the back of the copying machine as seen from the front.

Referring also to FIG. 5, a rotating shaft 211 is pivotally supported through the body 2 in its width direction.

A pulley 211 is fixed to this rotating shaft 211 on the front side of the copying machine, and a pulley 217 and a pulley 217 are connected to each other.
A wire 215 is wound endlessly between the wire 5 and the wire 215.

A pulley 214 is fixed to the rotating shaft 211 at the rear of the copying machine as shown in FIG.

A support wall 204 is fixed to the body 2, and guides 206 and 208 are fixed to the support wall 204 along the horizontal movement direction of the moving member 136.

The movable support member 210 moves along the guides 206, 208 1. Can be mounted for horizontal movement.

The movable support member 210 has a Boo! provided at both ends in its moving direction. Wire 2 stretched between J 212 and 214
16 at both ends.

A rotation shaft 235 of the pulley 212 is pivotally supported by the support wall 204.

Therefore, by horizontally moving the knob 10 shown in FIG.
rotates.

Therefore, the wire 215 moves and the boo IJ 217 and its rotating shaft 211 rotate.

Therefore, as shown in FIG. 6, the pulley 214 integral with the rotating shaft 211 rotates, and the wire 216 moves.

Therefore, as the wire 216 moves, the movable support member 21
0 can be moved.

A cutting detection member 218 is pivotally supported by a rotation shaft 219 on the movable support member 210, and a deenergization detection member 222 is pivotally supported by a rotation shaft 202.

The cutting detection member 218 detects the moving direction 88 of the moving member 136.
In contrast, the deenergization detection member 222 is provided relatively forward in the moving direction 88.

The cutting detection member 218 and the deactivation detection member 222 rotate clockwise in FIG. 6 only when the moving member 136 moves in the moving direction 88, and when moving in the opposite direction 144, their upper parts 223, 225 only rotates counterclockwise in FIG. 6 around pins 224,226.

FIG. 7 is an enlarged view of the vicinity of the upper part 223 of the cutting detection member 218.

The cutting detection member 218 has a pin 224 at its upper part 223.
A stopper 227 is fixedly supported to prevent the upper portion 223 from swinging along the moving direction 88.

The torsion spring 229 loosely inserted into the pin 224
3 is elastically pressed against the stopper 227.

Therefore, when the moving member 136 travels in the moving direction 88, the upper portion 223 contacts the stopper 227 to swing the cutting detection member 218 around the rotation axis 219.

Transfer. When the movable member 136 travels in a direction 144 opposite to the moving direction 88, the upper part 223 is simply swung clockwise in FIG. Therefore, the cutting detection member 218 is connected to the rotation shaft 21.
It is stationary around 9.

The upper part 225 of the deenergization detection member 222 also has a structure similar to that shown in FIG.

Note that the paper feed detection member 146 has a structure similar to that shown in FIG. 7, and the swinging force direction of the moving member 136 is opposite to that of the above-mentioned cutting detection member 218 and deenergization detection member 222.

When the cutting detection member 218 rotates around the rotation shaft 219, the copy paper cutting device 24 is activated to cut the copy paper 2.
Cutting of 0 is performed.

Referring again to FIG. 6, the support wall 204 includes a tilting member 2.
28 is pivotally supported, and on the outside of this tilting member 228,
Another tilting member 230 is similarly pivoted.

The tilting members 228 and 230 tilt around the rotation wheel line along the moving direction 88 in response to the rotation of the cutting detection member 218 and the deenergization detection member 222 in the clockwise direction in FIG. 6, respectively.

One end of a swinging rod 232, which is pivotally supported on the support wall 204 by a pin 233, contacts the tilting member 230, and the other end of this swinging rod 232 contacts one end of a swinging claw member 234, as shown in FIG. come into contact with

The swinging claw member 234 is pivotally supported on the body 2 by a swinging shaft 236, and a claw 238 is provided at the other end of the swinging claw member 234.
is formed.

An actuation rod 242 has a pawl 240 that engages pawl 238.
It is pivotally supported on the body 2 by a swing shaft 244.

A counterclockwise elastic force in FIG. 4 is applied to the swing claw member 234 by a screw spring (not shown) fitted into the swing shaft 236.

Actuation rod 242 is actuator 248 of switch 246
This is for activating the .

The operating rod 242 is given a resilient force in the clockwise direction in FIG. 4 around the swing shaft 244 by the spring force of the actuator 248.

When the moving member 136 is in the rest position 142, the pawl 238
, 240 are not engaged.

During copying, the moving member 136 moves from its rest position 142 in the moving direction 144 and presses down on the actuating rod 242.

Then, the pawl 240 engages with the pawl 238 as shown in the fourth figure, and the engaged state is maintained.

When the actuating rod 242 is pushed down by the moving member 136, the actuator 248 of the switch 246 is pushed down, and the switch 246 becomes conductive.

FIG. 9 is an electrical circuit diagram of the electrostatic copying machine.

The switch 246 is commonly connected in series to the exposure lamp 42 and the charging device 26 which are connected in parallel, and when the switch 246 is turned on, the exposure lamp 42 is turned on and the charging device 26 charges the copy paper 20. It is in an operational state where it can be used.

When the print button 16 is pressed, the print switch 5
68 remains conductive, thus energizing motor 54, which is connected in series with print switch 568.

The print switch 568 remains conductive during the copying operation, and is cut off to deenergize the motor 54 when the moving member 136 returns to the original rest position 142 after the copying operation is completed.

When the moving member 136 returns to the rest position 142, the ejection rollers 118, 118' move the copy paper 2 onto the receiving plate 122.
Complete ejection of 0.

When the moving member 136 moves in the moving direction 88 from the position of the sprocket wheel 130, the cut detection member 218
is rotated counterclockwise in FIG. 4 to cause the cutting device 24 to cut the photographic paper 20.

Furthermore, the moving member 136 rotates the deenergization detection member 222.

Referring to FIG. 8, the movable member 136
22 is shown rotated counterclockwise.

The deenergization detection member 222 pushes down the tilting member 230, thereby causing the swinging rod 232 to disengage the claw 238 of the swinging claw member 234 from the claw 240 of the actuation rod 242, and accordingly, the switch 2
46 is cut off.

Therefore, the exposure lamp 42 and the charging device 26 are deenergized.

The distance b (see FIG. 4) between the cutting detection member 218 and the deactivation detection member 222 along the transport direction 88 is from the cutting position of the cutting device 24 to the front end 250 of the exposure zone Qd of the exposure device 28 in the copy paper transport direction. is chosen to be equal to or slightly longer than the distance C.

Therefore, the rear end of the copy paper 20 is cut and the exposure zone d
The exposure lamp 42 can be deenergized as soon as or after the front end 250 of the front end 250 has been passed.

FIG. 10 is a simplified horizontal sectional view of the drive device of the invention.

The rotating shaft 128, which is integral with the sprocket wheel 130, is supported by a bearing 310 on a side plate 312 of the copying machine.

The rotating shaft 128 is also connected to the side plate 312 by a bearing 314.
A fixed mounting is supported on plate 316.

A rotating shaft 318 integral with another sprocket wheel 132 is supported by a bearing 320 on the side plate 312.

The rotating shaft 318 is also supported by a bearing 324 on a mounting plate 322 that is fixed to this side plate 312 .

A first drive sprocket wheel 328 is attached to the rotating shaft 128 via a first direction clutch 326 .

This sprocket wheel 328 is rotationally driven by a chain wheel stretched between the sprocket wheel 328 and the motor 54.

The first one-way clutch 326 rotates when the first drive sprocket wheel 328 rotates in the direction of rotation 86 in FIG.
The rotational power is transmitted to the rotating shaft 128.

When the rotating shaft 128 is rotated in the same direction as the rotating direction 86 at a speed greater than the rotating speed of the first drive sprocket wheel 328 in the rotating direction 86, the first one-way clutch 326 does not transmit power from the rotating shaft 128 to the first drive sprocket wheel 328.

When the first driving sprocket wheel 328 rotates the rotary shaft 128 via the first one-way clutch 326, the running speed of the chino 1340 is the same exposure speed as the copy paper conveyance speed.

A second drive sprocket wheel 33 is attached to the rotating shaft 318.
0 is loosely inserted.

This second drive sprocket wheel 330 is connected to the rotating shaft 3
It has a boss 332 extending along 18.

A second one-way clutch 334 having the same structure as the first one-way clutch 326 is attached to the rotating shaft 318.

The second one-way clutch 3340 input end 336 is connected to the boss 33
2 and extends along the axis of the rotating shaft 318 in an abutting manner.

The outer diameter of the input end 336 and the outer diameter of the boss 332 are equal\.

A spring 338 is provided over and around the input end 336 and boss 332.

One end of this spring 338 is connected to the input end 336, and the other end is connected to a water wheel 340 that loosely surrounds the spring 338.

The direction of winding of spring 338 is such that it tightens boss 332 and input end 336 as second drive sprocket wheel 330 rotates in the direction of arrow 342 (see FIG. 4).

The water wheel 340 has teeth for preventing rotation when the water wheel 340 rotates in a rotational direction 342.

The spring 338 and the water wheel 340 constitute a wrap spring clutch 341.

The second drive sprocket wheel 330 is a chino 134
is driven by a motor 54 through the chain at a relatively high return speed so as to run faster than the exposure speed.

In FIG. 6 and FIG. 11, which is a partially enlarged view thereof,
A swinging rod 346 is pivotally supported on the support wall 204 by a rotation shaft 344 .

The swinging rod 346 is given a resilient force in the counterclockwise direction in FIG. 11 by a torsion spring (not shown) fitted into the pivoting shaft 344 so that one end thereof comes into contact with the tilting member 230.

The other end of the swinging rod 346 abuts one end of the claw member 348.

This claw member 348 is pivotally supported behind the body 2 by a pin 350.

The pawl 352 of the pawl member 348 can engage the teeth of the water wheel 340 .

Pawl member 348 has another pawl 354 .

This pawl 354 can engage a pawl 358 that is pivotally supported on the fuselage 2 by a pin 356.

The pawl 358 is given an elastic force in the counterclockwise direction in FIG. 11 by a torsion spring (not shown) in the direction of engagement with the pawl 354 around the pin 356.

The claw 358 has a protrusion 360.

In the rest state, that is, in the preparation state, the teeth of the waterwheel 340 and the claws 352 are in mesh with each other.

Pressing print button 16 energizes motor 54 and rotates first drive sprocket wheel 328 at a speed appropriate to the exposure speed.

At this time, since the water wheel 340 is engaged with the pawl 352 and its rotation is stopped, the power from the second drive sprocket wheel 330 is transferred to the input end 336 of the second one-way clutch 334 by the action of the wrap spring clutch 341. cannot be conveyed.

Therefore, the rotational power of the first drive sprocket wheel 328 is transmitted from the first one-way clutch 326 to the rotary shaft 128, causing the sprocket wheel 130 to rotate in the direction of arrow 86 and the chino 134 to run.

The rotational power from the sprocket wheel 1320 rotating shaft 318 is transferred by the action of the second one-way clutch 334 to its input end 336 and thus to the wrap spring clutch 341.
is not transmitted.

The moving member 13 connected to the chino 134 in this way
6 travels at the exposure speed and exposure is performed.

At the end of exposure, the moving member 136 traveling in the direction of arrow 88 rotates the deenergization detection member 222 clockwise in FIG. Rotate it counterclockwise as shown in Figure 6.

Therefore, the claw 352 of the claw member 348 is detached from the water wheel 340.

At the same time, the claws 354 and 358 are engaged, and the engaged state is maintained.

The rotational power from the second drive sprocket wheel 330 is then transmitted from the boss 332 to the input end 336 via the wrap spring clutch 341.

The rotational power from the input end 336 is transmitted to the second one-way clutch 33
4 to the rotating shaft 318.

Therefore, sprocket wheel 132 rotates at a return speed greater than the exposure speed.

The cheno 134 is driven accordingly, the sprocket wheel 130 and the rotary shaft 128 are rotated at a relatively high return speed, and this power is transferred to the first one-way clutch 32.
6, the first drive sprocket wheel 32 &
is not transmitted.

When the pawl 352 of the pawl member 348 is detached from the water wheel 340, the pawl 354 remains engaged with the pawl 358, and the pawl 354 remains engaged with the pawl 358.
40 and the claw 352 are maintained in a separated state.

The moving member 136 must therefore be driven at the return speed to the rest position 142.

Immediately before the movable member 136 reaches the rest position 142, the protrusion 362 (see FIG. 4) fixed to the chino 134 engages the pawl 3.
It comes into contact with the protrusion 360 of 58.

Therefore, the pawl 358 is rotated clockwise in FIGS. 4 and 11, the pawls 354 and 358 are separated, and the pawl 352
meshes with the water wheel 340.

Therefore, when the moving member 136 returns to the rest position 142, the water wheel 340 and the claw 352 of the swinging rod 348 are in mesh with each other.

Therefore, when starting the next copying operation, the moving member 136, the light projecting device 40, and the reflecting mirror 46 can travel at the speed of light.

In the above-mentioned embodiment, although the projecting device 40 and the moving member 136 are configured to return at a return speed greater than the exposure speed after exposure, the copying paper is
It is not possible to start the next copying operation until the paper is ejected. Therefore, when copying a large number of copies in succession, there is a problem that the entire copying time becomes long.

A drive system that solves this problem is shown in FIG.

The embodiment of FIG. 12 is similar to that of FIG. 10, and corresponding components are given the same reference numerals and will not be described again.

A notable feature is that the spring 90 extends between the boss portion 900 of the first drive sprocket wheel 328 and the input end 902 of the first one-way clutch 3260 with respect to the axis of rotation 128.
4 is loosely fitted, one end of this spring 904 is connected to the input end 902, and the other end of the spring 904 is connected to a water wheel 906 loosely fitted to the rotating shaft 128.

The spring 904 and the water wheel 906 constitute a so-called ramp spring clutch 908.

FIG. 13 shows the rotating shaft 128 and its vicinity in a simplified manner,
3 is a cross-sectional view perpendicular to the axis of the rotating shaft 128. FIG.

A pawl 910 can be engaged with the water wheel 906, and the pawl 910 is pivotally supported on the body 2 by a pin 912.

The claw 910 is connected to the water wheel 90 by a spring 914.
A resilient force is applied in the direction of engagement with 6.

When the electromagnetic plunger 916 is energized, the claw 9
10 is pulled in against the elastic force of the spring 914 to disengage from the water wheel 906.

FIG. 14 is an electrical circuit diagram of the drive device of FIGS. 12 and 13.

In this embodiment, print switch 568 associated with print button 16 has two circuit contacts 918 and 920.

An electromagnetic plunger 916 is connected in series to one contact 918 .

The other contact 920 of the print switch 568 is connected to the motor 5.
4, and this contact 920 is connected in parallel to the discharge detection switch 124.

The discharge detection switch 124 is connected to the discharge rollers 118 and 11.
When the copy paper 20 is not pinched between 8', the paper is blocked as shown in the figure, and the copy paper 20 is not pressed between the ejection rollers 118 and 8'.
, 118'.

When it is conducting.

When the print button 16 is pressed, the print switch 5
Contacts 918 and 920 of 68 remain conductive.

Therefore, the motor 54 is driven, and the electromagnetic plunger 916 is excited, so that the claw 910 is removed from the water wheel 906.

Therefore, the power from the first drive sprocket wheel 328 to run the chenno 134 at the exposure speed is transmitted from the input end 902 via the lamp spring clutch 908, and further via the first one-way clutch 326 to the rotating shaft 12.
8 and sprocket wheel 130 is rotated at the exposure speed.

When the exposure is completed, the moving member 136 moves to the deenergization detection member 22.
2 in the clockwise direction in FIG.

Therefore, as described above, the claw 352 of the claw member 348 is detached from the water wheel 340, and this state is maintained.

Therefore, the rotational power from the second drive sprocket wheel 330 is transmitted from the wrap spring clutch 341 to the rotating shaft 318 via the second one-way clutch 334.

Therefore, sprocket wheel 132 is rotated at a relatively high return speed.

At this time, the rotational speed of the rotating shaft 128 is greater than the rotational speed suitable for the exposure traveling speed of the first driving sprocket wheel 328, so the rotational power from the rotating shaft 128 is transferred to the first one by the action of the first one-way clutch 326. 1 drive sprocket wheel 328.

Immediately before the moving member 136 returns to the rest position 142, the protrusion 362 fixed to the chino 134 engages the protrusion 3 of the pawl 358.
60.

Therefore, the pawl 358 is rotated, the pawls 354 and 358 are separated, and the pawl 352 engages with the water wheel 340 accordingly.

When the moving member 136 returns to the rest position 142, the depressed state of the print button 16 is restored, thereby closing the contacts 918 of the print switch 568 and demagnetizing the electromagnetic plunger 916.

Therefore, the pawl 910 and the water wheel 906 are engaged, and the wrap spring clutch 908 is disconnected, so that the rotation of the sprocket wheel 1300 is stopped, and therefore the running of the cheno 1340 is stopped.

After moving member 136 returns to rest position 142,
The copy paper is delivered to the machine body 2 by the ejection rollers 118 and 118'.
until the discharge is completely discharged from the discharge detection switch 124.
is conducting.

Therefore, when the movable member 136 returns to the rest position 142 and pauses, the motor 54 is driven to rotate while the contact 920 of the print switch 568 is closed, and the copy paper is ejected.

. In the embodiment shown in FIGS. 12-14, the moving member 136
Since the motor 54 is energized from the time when the copy paper returns to the rest position 142 until the copy paper is ejected,
The driving force of the motor 54 allows the copy paper for the next copy to be transported to the transport path 36.

In other words, the next copying operation can be performed continuously in a state where the copy paper is not completely discharged from the machine body 2 by the discharge rollers 118, 118'.

Therefore, the time required to copy multiple sheets can be shortened.

As yet another embodiment of the present invention, instead of moving a part of the optical device as described above, the document table may be moved, and the present invention can also be practiced in this case.

Furthermore, instead of a roll of copy paper, the present invention can be practiced in connection with a copy paper in which a large number of stacked copy papers, each pre-formed to a predetermined size, are fed one by one.

As described above, according to the present invention, a part of the optical device or the original table is connected to the cable in an endless manner, and the cable is run in one direction to achieve reciprocating motion. Since the running speed of the strip is set back to a high speed after exposure, the time required for the copying operation is shortened.

Further, the first winding wheel is configured to intermittent transmission of rotational power from the first drive wheel to the wheel in accordance with the exposure speed by the first one-way clutch and the first lap spring clutch. Even when a part of the optical device or the original platen is stopped, the first drive is activated, so the drive source of the first drive wheel remains energized and the power of the drive source is used, for example, to convey copy paper. It can be used for such purposes, etc., and other effects are exhibited.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an electrostatic copying machine according to an embodiment of the present invention, FIG. 2 is a simplified vertical sectional view of the copying machine shown in FIG. A simplified perspective view showing the moving device including the light projector 40, the reflector 46, and the movable reflector 48, FIG. 4 is a simplified rear view as seen from behind the copying machine, and FIG. 5 shows the structure. A front view of the copying machine seen from the front with the cover removed, FIG. 6 is a perspective view of a portion of the back seen from the front of the copying machine, and FIG. 7 is a front view of a portion of the cutting detection member 218. 8 is a rear view showing a part of the copying machine as seen from behind, FIG. 9 is an electric circuit diagram of the electrostatic copying machine, and FIG. 10 is a drive device of an embodiment of the present invention. A simplified horizontal sectional view, FIG. 11 is an enlarged view of the vicinity of the water turbine 340, FIG. 12 is a sectional view of a driving device according to another embodiment of the present invention, and FIG. 13 is a sectional view of the vicinity of the water turbine 906 in FIG. 12. Figure, 1st
FIG. 4 is an electrical circuit diagram related to the embodiment of FIGS. 12 and 13. 38...Optical device, 130, 132...
・Sufrocket wheel, 128,318...
Rotating axis, 134... Cheno, 222...
- Deenergization detection member, 230...Tilt member, 326
...First one-way clutch, 328...
1st, drive sprocket wheel, 330゛...°...
Second drive sprocket wheel, 332°...Boss, 334...Second one-way clutch, 336...
...Input end, 338...Spring, 340.
... Rook, 341 ... Wrap spring clutch, 348 ... Claw member, 352 ...
・Claw, 900...Boss, 902...Input end, 904...Spring, 906...Rook, 908...Ramp spring clutch ,9
10...Claw, 916...Electromagnetic plunger.

Claims (1)

[Claims] 1. A pair of windings that rotate in one direction are connected to a driving device of a copying machine in which a part of an optical device or a document table is connected to a cable that is endlessly wound between wheels. □One winding is loosely fitted coaxially to a rotating shaft that is integrated with the wheel, and the one winding is rotated at the same speed as the conveyance speed of the copy paper during exposure, and the one Q winding is rotated at the exposure speed at which the rope is run by the wheel. One winding is a one-way clutch that transmits the rotational power from the low-speed driving vehicle to the rotating shaft of the car, and the other winding is loosely fitted to the rotating shaft that is integrated with the car, a high-speed drive wheel having a boss extending along an axis of rotation, the other winding rotating the car at a return speed greater than the exposure speed; the other winding is a one-way clutch that has an input end disposed abutting against the boss, and the other winding is a one-way clutch that transmits rotational power to the rotating shaft of the vehicle; and a wrap spring clutch, the other winding is a wrap spring clutch. The hook is loosely fitted to the rotating shaft of the wheel, and the other hook surrounds the outer periphery of the water wheel having teeth for preventing rotation of the rotating shaft of the wheel, the boss and the input end, and has one end. Such a wrap spring clutch has a spring at the input end, the other end of which is connected to the water wheel, and the other winding clamps the boss and the input end in the rotational direction of the rotation shaft of the wheel; a claw that meshes with the teeth of the water wheel; and a claw provided in association with the cable, which meshes the water wheel and the claw when the cable is at rest and during exposure travel; 1. A drive device for a copying machine, comprising means for releasing the engagement with a claw. 2. A driving device for a copying machine in which a part of an optical device or a document mounting table is connected to a cable that is endlessly wound between the wheels of the first and second hooks that rotate in one direction, a first drive wheel having a boss that is loosely fitted onto a rotating shaft that is integral with the vehicle and extends along the rotating shaft; 1 a first one-way clutch having an input end disposed abutting against the boss of the drive wheel, the first winding being configured to transmit rotational power to the rotating shaft of the vehicle; and a first ramp spring clutch, The first winding hook is loosely fitted to the rotating shaft of the car, and the first winding hook extends between a first ratchet wheel having teeth for preventing rotation of the car, a boss of the first drive wheel, and the input end. , one end is connected to the input end and the other end is connected to the first ratchet wheel, and the first wrap tightens the boss of the first drive wheel and the input end in the rotational direction of the rotation axis of the wheel. a first lap spring clutch having a spring for the water wheel; a first pawl that meshes with the teeth of the water wheel; and the second winding hook is loosely fitted to a rotating shaft integral with the wheel, and the rotation thereof a second drive wheel having a boss extending along an axis; a second one-way clutch having an input end disposed abutting against the boss of the drive wheel, the second winding clutch transmitting rotational power to the rotating shaft of the wheel; and a second lap spring clutch, The second winding hook is loosely fitted to the rotating shaft of the wheel, and the second winding hook extends between a second ratchet wheel having teeth for preventing rotation of the wheel, a boss of the second drive wheel, and the input end. surrounding their outer peripheries, one end is connected to the input end and the other end is connected to the second ratchet wheel, and the second winding hook connects the boss of the second drive wheel and the input end in the rotational direction of the rotation axis of the wheel. a second lap spring clutch having a spring for tightening the clutch; and a second pawl meshing with the teeth of the second pawl, the first drive wheel controlling the copy paper transport speed during exposure. said first at the same speed as
The sling rotates at an exposure speed that causes the cable to run by a wheel, and the second drive wheel rotates at a rotational speed that causes the cable to run by a wheel at a return speed that is greater than the exposure speed. , further provided on the cable, disengages the first ratchet wheel and the first pawl during exposure and after the end of exposure, engages the second ratchet wheel and the second pawl during exposure, and exposes After the end, the second ratchet wheel and the second pawl are disengaged, and the first
and a second ratchet wheel and means for engaging the first and second pawls, respectively.