JPS6051103B2 - electrostatic copying machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrostatic copying machine that cuts a roll of copy paper by appropriately adjusting it to a predetermined length depending on the length of a document, and particularly relates to an electrostatic copying machine that cuts a roll of copy paper by appropriately adjusting the length to a predetermined length depending on the length of an original. The present invention provides an electrostatic copying machine in which the control timing of the exposure lamp and the extinguishing of the exposure lamp is set according to the length of the copy sheet.

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 plate 4. A paper feeding device 8 for feeding copy paper 20 wound into a roll, which will be described in detail later, is attached to the machine body 2 as shown in FIG. It can be pulled 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 2 in the left-right direction of the machine body 2, and then adjusting the length according to the left-right position of the knob 10. You can choose the length. The number of copies of copy paper is set by two-digit display cylinders 12 and 14 provided at the upper front of the machine body 2. In the copying operation, the number of copies is set using the display tubes 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 means of a rotatable knob 18. When copy paper becomes jammed in the machine body 2, a jam indicator lamp 19 lights up. i 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. They are provided in this order to form the copy paper conveyance path 36. In the optical device 38 for forming an image of the document onto photosensitive copy paper 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, and the light projected onto the document from this light projecting device 40 and reflected is transmitted from a reflective mirror 46 to a movable reflective mirror 48.
, a lens 50 having an in-mirror, and reflecting mirrors 52 and 53 form an image of the document in the exposure band d.

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 a speed of 112 of the light 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.

Pulleys 60 and 62 having horizontal axes are provided at both left and right ends of the body 2 and spaced apart in the horizontal direction. Light projecting device 40
The reflecting mirror 46 is fixed to a support 64, and the support 64 is guided along guide members 66, 68 so as to be horizontally movable. Support body 7 that supports movable reflecting mirror 48
0 is guided so as to be horizontally movable along guides 72 and 74. A pulley 76 having a horizontal axis is pivotally mounted on the support 70 . One end of the wire 78 is fixed to the support body 64 and wound around the pulleys 60, 62, and 76 about half a turn each, and the other end 80 is fixed to the body 2. Another wire 82 has one end fixed to the support 64 and wound around the pulley 76 about half a turn, and the other end 84 is attached to the fuselage 2.
is fixed to. Therefore, when the support 64 moves in the direction of movement 88 to the left in FIG.
6, the movable reflector 48 is translated in the same direction of movement 88 as the projector 40 and the reflector 46 and at a speed of 112. Referring again to FIG. 2, in the paper feeding device 8, the rolled copy paper 20 from the holder 22 is decurled by a guide roller 90, passed through a pair of paper feeding rollers 92, 92'', and cut into copy paper. A device 24 is provided.

The copy paper cutting device 24 includes a rotary blade 96 and a fixed blade 98, and the copy paper is cut by the rotation of the rotary blade 96. A pair of copy paper transport rollers 100, 10', 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 10C are provided below the exposure zone d of the copy paper transport path 36. The pair of copy paper conveyance rollers 104, 104' are constantly driven by a motor 54. The movement of the light projection device 40 during the copying operation and the movement of the copy paper on the copy paper conveyance path 36 in the exposure zone d are performed in synchronization, and the photoconductivity of the copy paper 20 charged by the charging device 26 is An image of the original document is formed on the layer, and an electrostatic latent image corresponding to the image of the original document is formed on the copy paper 20. A magnetic brush developing device 30 provided on the discharge side of the copy paper transport rollers 104, 104'' includes a cylindrical developer holding member 108 which is provided on the copy paper transport path 36 and magnetically holds powdered toner on the surface. The peripheral surface of the developer holding member 108 and the copy paper 20 holding the electrostatic latent image.
is visualized by powdered toner while being moved at equal speed. A toner replenishing machine 110 is provided above the developer holding member 108 for storing replenishment powder toner and replenishing the developer holding member 108 . Developer holding member 1
A guide roller 112 for guiding the copy paper is provided below 08. A pressure fixing device 32 is provided on the discharge side of the magnetic brush developing device 30. This pressure fixing device 32 includes a pair of pressure rollers 1 to which a predetermined pressure is applied.
14, 114''. The copy paper developed in the developing device 30 passes between the pair of pressure rollers 114, 114", thereby fixing the unfixed toner image on the copy paper. A pair of ejection rollers 118, 118'' are provided on the ejection side of the fixing device 32, and eject the fused copy paper 20 onto the copy receiving plate 122. FIG. 4 shows a simplified view of the copying machine from behind. FIG.

A sprocket wheel 130 is fixed to a rotating shaft 128 that is pivotally supported on the body 2. The fuselage 2 has a sprocket wheel 130 spaced apart from it in the horizontal direction.
Another sprocket wheel 132 is pivoted.
A chain 134 is wound endlessly between these sprocket wheels 130, 132. The moving member 136 fixed to the support body 64 has a vertically elongated hole 138. A protrusion 140 fixed to the chain 134 is loosely fitted into the elongated hole 138 . Therefore, when sprocket wheel 130 rotates in the direction of arrow 86 and chain 134 travels, projections 140 horizontally reciprocate moving member 136. 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 drive unit rotates the sprocket wheel 130 in the direction of arrow 86.

Therefore, the moving member 136 in the rest position 142 moves in the direction of the arrow 144. The moving member 136 is then detected by the paper feed detection member 146. The paper feed detection member 146 is pivotably supported on the body 2 by a swing shaft 148 in the middle of its longitudinal direction, and a torsion spring (not shown) fitted into the swing shaft 148. The swing axis 14
An elastic force in the counterclockwise direction in FIG. 4 is applied around 8. A stopper 149 fixed to the body 2 limits rotational displacement of the swing shaft 148 in the counterclockwise direction. Referring to FIG. 5, the paper feed detection member 146 includes a contact piece 152 rotatably supported by a pin 150, and
is a pin 150 in front of the moving direction 144 of the moving member 136.
a stopper piece 154 that prevents rotation around the
A torsion spring 156 is provided which is fitted onto the pin 150 and resiliently biases the contact piece 152 around the pin 150 toward the stopper piece 154 side.

Therefore, when the moving member 136 moves in the moving direction 144, it comes into contact with the abutting piece 152, and rotates the paper feed detection member 146 around the swinging shaft 148 by twisting it into the swinging shaft 148. It is swung clockwise in Fig. 4 against the spring force of the spring. The protrusion 140 is the sprocket wheel 13
The moving member 136 is moved in the moving direction 8 by turning the outer circumference of the moving member 136 in a semicircular arc.
8, the moving member 136 touches the contact piece 15.
2 again, but at this time, the contact piece 152 only rotates counterclockwise in FIG. does not swing around the swing axis 148. The contact piece 1 with respect to the swing shaft 148 of the paper feed detection member 146
The end opposite to 52 is one end 159 of link 158.
comes into contact with.

The link 158 has elongated holes 160 and 162 extending in the longitudinal direction, into which guide protrusions 164 and 166 provided on the body 2 are loosely inserted, respectively. In this way, the link 158 is supported by the fuselage 2 in a horizontally movable manner. FIG. 6 is an enlarged rear view of the paper feeder 8 and its vicinity as seen from behind the copying machine.

The link 158 is connected to the paper feed detection member 14 by a spring 168.
6 side (right side in FIGS. 4 and 6), one end 159 of the link 158 is brought into contact with the paper feed detection member 146. In order to be able to adjust the starting point of paper feed, the link 158 is adjustable in its length, and for this purpose one end 159 and the other end 170 of the link 158 are formed by a longitudinal projection. The length can be adjusted by means of mounting screws 172, 174. There is a link 1 on the side wall of the paper feeder 8.
A swinging claw member 176 whose one end abuts the other end 170 of 58
is pivotably supported around a pivot shaft 178.

The swing claw member 176 is elastically biased clockwise in FIGS. 4 and 6 by a torsion spring (not shown) fitted into the swing shaft 178. A pawl 180 is formed at the other end of the swing pawl member 176. This claw 180 meshes with the teeth of a ratchet wheel 184 mounted on a rotating shaft 182 that is integral with the paper feed roller 925 (see FIG. 2). The teeth of the ratchet wheel 184 are oriented to prevent the copy paper 20 from rotating in the paper feed rotation direction 186. FIG. 7 is a horizontal sectional view of the vicinity of the paper feed roller 92''.

A sprocket wheel 188 is loosely fitted onto the rotating shaft 182, and the boss 19 of the sprocket wheel 188
0 extends along axis of rotation 182. The rotating shaft 182 includes
A one-way clutch 192 is mounted in abutting manner with the boss 190. One-way clutch 192 has its input end 194
The rotational power in the direction of arrow 186 from 186 is transmitted to the rotating shaft 182, and the rotational power in the opposite rotational direction is not transmitted. Such a one-way clutch 192 has a large number of rollers disposed in the circumferential direction and a large number of recesses that are narrowly inclined in the direction of the arrow 186 and are interposed between each roller and the outer peripheral surface of the rotating shaft 182. The roller is provided with a formed input end 194, and when the input end 194 rotates in the direction of the arrow 186, the roller is caught between the outer peripheral surface of the rotating shaft 182 and the recess to transmit torque. It may be something from the past. The sprocket wheel 188 is constantly rotationally driven by the motor 54. Input end 194 of one-way clutch 192
A portion having the same outer diameter as the outer diameter of the boss 190 of the sprocket wheel 188 is formed in the sprocket wheel 188 .

A portion of the input end 194 and the outer periphery of the boss 190 are surrounded by a spring 196 . The spring 196 is wound in a coil shape in a direction that tightens the boss 190 and the input end 194 in the paper feed rotation direction 186, and one end is connected to the ratchet wheel 184 and the other end is connected to the input end 194. In this way, the ratchet wheel 184 and the spring 196 constitute a so-called wrap spring clutch 198. Moving member 136 is at rest position 1
42, the claw 180 of the swinging claw member 176 is connected to the ratchet wheel 18.
4 teeth, the spring 196 of the wrap spring clutch 198 loosens the boss 190 of the rotating sprocket wheel 188. Therefore, the rotational power of the sprocket wheel 188 is not transmitted to the paper feed roller 92''. During copying, the movable member 136 moves in the direction of arrow 144 to move the paper feed detection member 146 around the swing shaft 148 in FIG. When rocking clockwise,
The link 158 is displaced to the left in FIG.
Swings counterclockwise as shown in the figure. Therefore, the pawl 180 is the pawl wheel 1.
The meshing state with the 84 teeth is released. The spring 196 of the wrap spring clutch 198 therefore clamps the boss 190 of the rotating sprocket wheel 188 and the input end 194 of the one-way clutch 192 together. Therefore, the rotational power from the sprocket wheel 188 is
It is transmitted to the rotating shaft 182 via a wrap spring clutch 198 and a one-way clutch 192. In this way, the paper feed roller 92'' feeds the copy paper 20 along the conveyance path 36 while holding the copy paper 20 between it and the other paper feed roller 92 only during the period when the pawl 180 and the ratchet wheel 184 are disengaged. In this embodiment, the length of the link 158 is adjusted and set in advance, and the paper feed detection member 146 is swung clockwise in FIG. 4 while the moving member 136 is moving in the direction of the arrow 144. period,
In other words, the feed roller 92'' is selected to rotate twice during the time the moving member 136 moves by the length a (see FIG. 4) in contact with the contact piece 152.

By rotating the paper feed roller 92'' twice, the leading edge of the copy paper 20 located at the cutting device 24 is conveyed to at least a pair of copy paper conveyance rollers 100, 10''.
Since these pair of copy paper conveying rollers 100, 10' are constantly rotated by the motor 54, the copy paper 20'
Once the copy paper 20 is pinched by the pair of copy paper conveyance rollers 100, 10', the copy paper 20 is pulled even if the pawl 180 and the ratchet wheel 184 engage, and accordingly, the copy paper 20 is pulled in one direction. By the action of the clutch 192, the paper feed roller 92''
It rotates freely together with the two paper feed rollers 92. Link 15
By appropriately adjusting and setting the length of the claw 180
It is possible to select the time point at which the paper is separated from the ratchet wheel 184, that is, the time point at which paper feeding starts. For example, by extending the one end 159 and the other end 170 outward in the axial direction to make the entire length of the link 158 longer, the paper feeding start point can be brought forward. In addition, such a paper feeding start point can be accurately adjusted and set by visual inspection. Therefore, there are advantages in that paper feeding timing can be accurately and easily achieved, and maintenance is easy.
FIG. 8 shows a state in which the paper feeding device 8 is pulled out from the rod 2 by a telescopic guide rail 200.

The swing claw member 176 is connected to the claw 180 and the ratchet wheel 184 by a torsion spring (not shown) fitted into the swing shaft 178.
Since the paper feed roller 92'' is elastically biased to maintain engagement with the paper feed roller 92'', the paper feed roller 92'' does not rotate undesirably.In the state shown in FIG. 8, the copy paper 20 is held between the paper feed rollers 92, 92" by rotating the rotary knob 202 (see FIG. 7) fixed to the rotating shaft 182 of the paper feed roller 92". Cutting device 2
It is sufficient to supply up to 4. When rotating the rotary knob 202 in the paper feed rotation direction 186, the paper feed roller 92 becomes idle due to the action of the one-way clutch 192. Therefore, the copy paper can be conveyed to the cutting device 24 while the engagement between the ratchet wheel 184 and the claw 180 of the swinging claw member 176 is always maintained. In this embodiment, when the copying operation is completed and the movable member 136 returns to the rest position 142, the copy paper has been ejected onto the copy receiving plate 122 by the ejection rollers 118, 11'. Select the length of the paper conveyance path 36. FIG. 9 is a front view of the copying machine as seen from the front.
Shown with the front cover of the copier removed.

The knob 10 is horizontally displaceable along the guide rod 201. The knob 10 is connected to a wire 213 stretched between pulleys 203 and 205. FIG. 10 is a perspective view of a portion of the back of the copying machine seen through from the front.

Referring also to FIG. 9, a rotating shaft 211 is pivotally supported through the body 2 in its width direction. This rotating shaft 211 has
A pulley 217 is fixed on the front side of the copying machine, and a wire 215 is connected between the pulley 217 and the pulley 205.
is wrapped endlessly. 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. Movable support member 2
10 is mounted horizontally movably along guides 206 and 208. The movable support member 210 is fixed to both ends of a wire 216 stretched between pulleys 212 and 214 provided at both ends in the moving direction. Pulley. A rotation shaft 235 of 212 is pivotally supported by the support wall 204. Therefore, by horizontally moving the knob 10 shown in FIG. 9, the wire 213 is moved, and therefore the pulley 1J205 is rotated. The wire 215 is therefore moved, causing the pulley 217 and its rotating shaft 2.11 to rotate. Therefore, as shown in FIG. 10, the pulley 1J214 that is integral with the rotating shaft 211 rotates, and the wire 216 moves. Therefore, as the wire 216 moves, the movable support member 210 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 220.

The cutting detection member 218 is provided relatively rearward along the exposure movement direction 88 of the moving member 136, whereas the deenergization detection member 222 is provided relatively forward in the exposure movement direction 88. It is being The cutting detection member 218 and the deactivation detection member 222 rotate clockwise in FIG. 10 only when the moving member 136 moves in the exposure movement direction 88, and when moving in the opposite direction 144, their upper portions 2
23, 225 only rotate counterclockwise in FIG. 10 about pins 224, 226, such construction being similar to that described in connection with FIG. A tilting member 228 is pivotally supported on the support wall 204 by a pivot parallel to the stretching direction of the wire 216, and another tilting member 230 is similarly pivotally supported on the outside of this tilting member 228. .
The tilting members 228 and 230 tilt about the rotation axis along the exposure movement direction 88 in response to the clockwise rotation of the cutting detection member 218 and the deenergization detection member 222, respectively. The tilting member 230 has a pin 233 on the support wall 204.
One end of a swinging rod 232 pivotally supported by the swinging rod 232 contacts the swinging rod 232, and the other end of the swinging rod 232 contacts the swinging claw member 2 as shown in FIG.
34. The swing claw member 234 is connected to the swing shaft 23
6, and this swinging claw member 2
A claw 238 is formed at the other end of 34.

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 torsion spring (not shown) fitted into the swing shaft 236. The actuating rod 242 is for actuating the actuator 248 of the switch 246. A resilient force in the clockwise direction in FIG. 4 is applied to the operating rod 242 by the spring force of the actuator 248. Moving member 1
When 36 is in rest position 142, pawls 238, 240 are not engaged.

During copying, the moving member 136 moves from its rest position 142 in the moving direction 144 to push down 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 2
46 is made conductive. FIG. 12 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. A print switch 568 is connected in series to the motor 54. print switch 56
8 remains conductive when the print button 16 is pressed, and shuts off when the moving member 136 returns to its original rest position 142. When the moving member 136 moves in the exposure movement direction 88 from the position of the river 30, the cutting detection member 2
18 is rotated counterclockwise in FIGS. 4 and 11 to cause the cutting device 24 to cut the rear end of the copy paper.

Furthermore, the moving member 136 rotates the deenergization detection member 222. Referring to FIG. 11, a state in which the moving member 136 rotates the deenergization detection member 222 in the counterclockwise direction is shown.

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 actuating 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 exposure transfer direction 88 is the distance from the cutting position of the cutting device 24 to the distance between the cutting position of the cutting device 24 and the exposure device 28.
The distance C to the front end 250 in the copy paper transport direction of the exposure band d of
chosen to be equal to or slightly longer than .

Therefore, the rear end of the copy paper 20 is cut and the exposure zone d
The exposure lamp 42 can be deenergized at the same time or after passing the front end 250 of the. Figure 13 shows the cutting device 24 seen from behind the copying machine.
It is an enlarged view of.

The link 252 whose upper end is in contact with the tilting member 228 is
It has vertically elongated holes 254 and 256. These vertical holes 254
, 256 have pins 258, 260 fixed to the fuselage 2.
are fitted, thereby allowing the link 252 to move up and down. The link 252 is connected to the contact portion 2 of the multi-claw member 262.
64. The multiple claw member 262 has a swing shaft 266.
It is pivoted to the fuselage 2 by. The multi-jaw member 262 has control pawls 2 at different positions in the circumferential direction around the swing shaft 266.
68 and a rotation stopper claw 270. FIG. 14 is a longitudinal sectional view of the cutting device 24.

The multi-jaw member 262 is given an elastic force in the clockwise direction in FIG. 13 by a torsion spring 272 fitted into the swing shaft 266. A gear 27 is attached to a rotating shaft 274 that is integral with the rotating blade 96.
6 is loosely fitted. The gear 276 has a boss 278 that extends along the axis of rotation 274 . Gear 276 is gear 2
It meshes with 80. Sprocket wheel 281 integral with gear 280 and sprocket wheel 188 associated with ratchet wheel 184 are connected via chain 283. The gear 280 meshes with a gear (not shown) that is pivotally supported on the machine body 2 side and is constantly rotationally driven by the motor 54. When the paper feed device 8 is pulled out from the machine body 2, the gear 280 The meshing with the gear on the body 2 side that is meshing can be disengaged. The multi-claw wheel 282 is loosely fitted onto the rotating shaft 274. This double claw wheel 282 has control teeth 284 disposed at different positions in the axial direction and in the circumferential direction to prevent rotation of the rotary blade 96.
and rotation stopping teeth 286. In this embodiment, these teeth 284 and 286 are formed on one diameter line of the compound ratchet wheel 282. A boss member 288 is fixed to the rotating shaft 274, and this boss member 288 butts against the boss 278 of the gear 276 in the axial direction. A spring 290 is provided surrounding the boss 278 and the boss member 288.
This spring 290 has a winding direction that tightens the boss 278 and the boss member 288 along the rotational direction 298 of the rotary blade 96, and has one end attached to the boss member 288'' and the other end attached to the multi-claw wheel 282. Connected.Multi-claw wheel 282 and spring 290
constitutes a so-called wrap spring clutch 292. FIG. 15 is an end view taken along line X--X in FIG. 14.

The rotary blade 96 has, for example, 28 blades around its axis of rotation.
The cutting edge 294 has a spirally twisted cutting edge 294. The fixed blade 98 has a linear cutting edge 296 parallel to the rotary blade 96. In the state shown in Fig. 15, the cutting blades 294, 296
A gap forming a copy paper conveyance path 36 is provided between them, and the copy paper passes through this gap and is cut by rotating the rotary blade 96 in the rotation direction 298.
At the time of this cutting, the copy paper moves along the conveyance path 36 at the arrow 299.
While being conveyed in this direction, the copy paper is continuously cut from one end to the other end in the width direction by blades 294 and 296. Therefore, a certain amount of time is required before the copy paper is cut across its entire width, and the copy paper is being transported during this time as well. According to the above-mentioned rotary blade 96, the front end of the cut subsequent copy paper does not come into contact with the cutting blade 294 and its conveyance is prevented. Therefore, the cutting edge 29
4 provides an excellent advantage in that the copy paper will not be folded and paper jams will not occur. Referring again to FIGS. 4, 13, and 14, when the moving member 136 is not in contact with the cutting detection member 218 and is not rotating,
The control pawl 268 of the multiple pawl member 262 is engaged with the control teeth 284 of the multiple pawl wheel 282, and therefore, the rotation of the multiple pawl wheel 282 is prevented.

Gear 280 and gear 276 are rotationally driven, and the direction of rotation of gear 276 is indicated by arrow 298. The wrap spring clutch 292 is connected to the boss 27 of the gear 276.
8 and the boss member 288 are loosened, and the rotational power from the gear 276 is not transmitted to the rotating shaft 274. Moving member 1
36 moves in the exposure movement direction 88, and the cutting detection member 2
18 about the pivot shaft 219 in the counterclockwise direction in FIGS.
Press down on 52.

Therefore, the multi-jaw member 262 resists the elastic force of the torsion spring 272 fitted into the swing shaft 266, and
Rotate counterclockwise as shown. Therefore, the control teeth 284 of the multi-claw wheel 282 and the control pawls 268 of the multi-claw member 262 are disengaged. Therefore, the double claw wheel 282 has an arrow mark 298.
Rotation in the direction is allowed. Accordingly, the spring 290 of the wrap spring clutch 292 tightens the boss 278 and the boss member 288, so that the rotational power from the gear 276 is transferred to the rotating shaft 2 through the wrap spring clutch 292.
74 and the rotary blade 96. The double claw wheel 282 and therefore the rotary blade 96 are smaller than 360 degrees and 3(1)
Since the rotary blade 96 rotates at a high speed, the time t1 during which the movable member 136 rotates in the direction of rotation 298 by an angle close to 50° is relatively short; It is shorter than the time T2 for which the screw remains rotated counterclockwise in FIG. (t1 x T2). Therefore, after the rotation stopper tooth 286 has rotated by a little less than 360 degrees, it engages with the rotation stopper pawl 270, and the compound pawl wheel 282 is prevented from rotating further. Therefore, further rotation of the rotary blade 96 is prevented by the action of the wrap spring clutch 292. After the control teeth 284 and the control pawl 268 are disengaged, the double pawl wheel 282 is rotated to ensure that the rotation stopper tooth 286 and the rotation stopper pawl 270 are engaged with each other. The tooth heights G and h of teeth 284 and 286 are g
It is determined by the relationship <h. When the rotation stopper tooth 286 is engaged with the rotation stopper pawl 270, when the movable member 136 moves further in the direction of arrow 88 to break contact with the cutting detection member 218, the multi-jaw member 262 is torsion spring 2
Due to the elastic force of 72, it is rotated back clockwise in FIG. 13 around the swing shaft 266. Therefore, the compound pawl wheel 282 rotates in the direction of the arrow 298, and the control teeth 284 and the control pawl 268 rotate.
and are engaged. In this way it returns to its original state. Since the rotary blade 96 does not rotate more than 360 degrees, the production of paper scraps is prevented, and paper jams caused by this are prevented from occurring.

Referring to FIGS. 9 and 14, a hand-cutting lever 304 is attached to the other end of the rotating shaft 274 of the rotary blade 96 via a one-way clutch 302. As shown in FIGS. one way clutch 30
2 functions to transmit the torque to the rotating shaft 274 only when the manual cutting lever 304 is rotated in the rotational direction 298. The swing angle of the manual cutting lever 304 is limited by stoppers 303 and 305 provided upright on the machine body 2. The one-way clutch 302 may be a conventional one, and for example, the one-way clutch 302 may include a large number of rollers disposed in the circumferential direction and each roller interposed between the outer peripheral surface of the rotating shaft 274 and
Input end 194 in which a number of narrowly inclined recesses are formed at 8.
and when the manual cutting lever 304 rotates in the rotational direction 298, the roller is inserted between the outer peripheral surface of the rotating shaft 274 and the recess to transmit torque. good. Referring to FIG. 6, a press-down ridge piece 300 is fixed to the body 2 and has an inclined surface that slopes upward toward the multi-jaw member 262 side.

The push-down piece 300 moves the paper feeder 8 to the machine body 2 as shown in FIG.
When the multi-claw member 262 is pulled out from the
Unravel the mesh with. Therefore, the paper feeding device 8 is pulled out from the machine body 2 as shown in FIG. 8, and the holder 2 holding the copy paper 20 is opened.
2, the paper feed rollers 92, 92″
Sandwich the copy paper between them and turn the knob 202 to remove the cutting blade 29.
4,296 copies of paper were produced. In this state, swing the manual cutting lever 304 to move the rotary blade 96 in the rotation direction 298.
By rotating the pin 303 to the pin 305 in the direction of , the copy paper can be cut and prepared for copying operation. By providing the one-way clutch 302 between the hand-cut lever 304 and the rotary blade 96, the rotary blade 96 can be rotated simply by swinging the hand-cut lever 304, and conversely, the torque from the rotary blade 96 is It is not transmitted to the manual cutting lever 304. Therefore, the rotary blade 96 can be rotated by a relatively small swing angle displacement of the hand-cut lever 304, and the torque of the rotary blade 96 is
The inertial force of the rotary blade 96 during rotation during the copying operation is suppressed to a small level.
can be reliably stopped, and the impact force at the time of stopping is small. As described above, according to the present invention, the control timing for cutting the roll-shaped copy paper and turning off the exposure lamp is achieved in conjunction with a part of the optical device or the original placing table. The length and the length of the copy paper are simultaneously set by the position setting means. Therefore, the lighting time of the exposure lamp is set depending on the length of the copy paper. Therefore, due to the heat generated by the exposure lamp,
This prevents the transparent plate on which the original is placed from breaking.

[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 longitudinal sectional view of the copying machine shown in FIG. A simplified perspective view showing the moving device for the projecting device 40, the reflecting mirror 46, and the movable reflecting mirror 48, FIG. 4 is a simplified rear view as seen from behind the copying machine, and FIG. 5 is a paper feed detection 6 is an enlarged rear view of the paper feed device 8 and its vicinity as seen from behind the copying machine, FIG. 7 is a horizontal sectional view of the vicinity of the paper feed roller 92'', and FIG. 8 is a front view showing the upper part of the member 146. 9 is a rear view showing the paper feeding device 8 pulled out from the machine body 2 by the telescopic guide rail 200, FIG. 9 is a front view of the copying machine as seen from the front, and FIG. 10 is a transparent view from the front of the copying machine. FIG. 11 is a perspective view showing a part of the back of the copying machine as seen from behind;
FIG. 12 is an electrical circuit diagram of the electrostatic copying machine, FIG. 13 is an enlarged view of the cutting device 24 seen from the back of the copying machine, FIG. 14 is a vertical cross-sectional view of the cutting device 24, and FIG. 15 is a cross-sectional view taken along the section line X■-X■ in FIG. 14. 20... Roll copy paper, 24... Cutting device, 136... Moving member, 218...
... Cutting detection member, 222... Deenergization detection member,
d...Exposure band.

Claims (1)

[Claims] 1. An optical device that moves horizontally in an electrostatic copying machine that feeds a roll of copy paper into an exposure zone via a cutting device for each copying operation and cuts it into a predetermined length for each copying operation. a movable member that moves integrally with a part of the document mounting table or a document mounting table; a cut detection member that responds to movement of the movable member in the exposure movement direction; and a cut detection member that is located forward of the cut detection member in the exposure movement direction of the movable member. a deactivation detection member that responds to the movement of the movable member in the exposure movement direction; a cutting means that cuts the copy paper in response to the response of the cutting detection member; and an exposure lamp that responds to the movement of the deactivation detection member in the exposure movement direction; a means of deactivating the
The cutting detection member and the deenergization detection member include position setting means that can freely adjust and set the position along the movement path of the moving member integrally, and the exposure movement of the cutting detection member and the deactivation detection member is provided. An electrostatic copying machine characterized in that the distance along the direction is equal to or longer than the distance from the cutting position of the cutting device to the front end of the exposure zone in the copy paper conveyance direction.