JPS6030748Y2 - Copy machine paper conveyance device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper conveyance device for removing jammed paper when a document or paper from a copying machine or the like conveyed by a conveyance roller becomes jammed in the middle of the conveyance path.

For example, in a diazo copying machine, paper such as an original or copy paper is conveyed while being clamped by a plurality of pairs of conveyance rollers arranged along a conveyance path.

When a paper jam occurs in the middle of the conveyance path, it is desirable to open the swinging body pivoted to the machine body in order to remove the paper jam, and at the same time release the pinching state of the conveyance rollers that threatens the pair. .

A prior art technique for solving this problem is disclosed in, for example, Japanese Utility Model Publication No. 44-13431, and its basic structure is shown in FIG. 15.

The photosensitive paper that has been printed in the diazo copying machine is separated from the original paper by an automatic separating device 208, and is separated from the original paper by an automatic separating device 208, which passes through a photosensitive paper path 209, a roller 210 that rotates in pressure contact with an endless belt 204, a guide path 211 leading to a developing device, and a feeding device. The toner is sent to the developing device 213 via rollers 212a and 212b.

The developed photosensitive paper is sent out to a plate 216, which is a swinging body, by rollers 215a and 215b.

Belt 204 is wound around roller 203.

The support plate 216 is pivotally connected to the body of the copying machine by a shaft 217.

A roller 210 and an upper guide plate 218 for the photosensitive paper path 209 are provided on the receiver plate 216 .

The receiver separates the roller 210 from the endless belt 204 by rotating the plate 216 around the shaft 217 in the direction of arrow A and placing it in the position shown by the imaginary line 216a, and
Open the guide plate 218 to release the photosensitive paper path 209.

This allows the jammed photosensitive paper to be removed.

A new problem encountered in the prior art shown in FIG. 15 is that the leading edge of the photosensitive paper causing the paper jam is
12a and 212b, and the photosensitive paper is held between the belt 204 and the roller 210, the receiver angularly displaces the plate 216 around the axis 217 in the direction of arrow A. At this time, the photosensitive paper held between the belt 204 and the roller 210 is being pulled left and right in FIG.

This may cause damage to the photosensitive paper.

As a result, the photo must be exposed again using new photosensitive paper.

Further, in this prior art, when the rear end of the photosensitive paper is clamped by the automatic separating device 208 and the leading edge of the photosensitive paper is pinched and pressed between the belt 204 and the roller 210, the receiver is moved at the arrow A on the plate 216. When the photosensitive paper is angularly displaced in this direction, the leading edge of the photosensitive paper is displaced downstream in the conveying direction (to the left in FIG. 15), thereby causing wrinkles in the photosensitive paper.

When such photosensitive paper becomes wrinkled, paper jams are more likely to occur.

Furthermore, another problem with the prior art shown in FIG.
In order to increase the clamping pressure used for the photosensitive paper between the belt 204 and the roller 210, the roller 203 can be moved up and down as shown in FIG.
When the structure is such that the spring is biased upward in the figure, the spring constant of this spring must be determined in consideration of the weight of the plate 216.

Setting the spring constant is troublesome. The plate 216 is the first
In order to maintain a stable attitude as shown by the solid line in Figure 5, the receiver is designed to hold the plate 216 to the fuselage in order to prevent the plate 216 from being angularly displaced in the direction of arrow A. Requires means for fixation and release.

Therefore, the structure becomes complicated.

In the prior art described above, there is a risk that the photosensitive paper may be damaged or wrinkled, and when the original paper is conveyed in such a configuration, the original paper may be damaged or wrinkled. , thus belt 204, roller 210, shaft 217 as shown in FIG.
And the receiver cannot use the configuration associated with plate 216 for conveying the original paper.

The purpose of this invention is to prevent the paper from being damaged by not applying any tensile force to the paper when the pair of transport rollers installed in the transport path are separated from each other when the oscillator is released. An object of the present invention is to provide a paper conveying device for a copying machine.

Another object of the present invention is to increase the paper clamping pressure exerted by the pair of conveyance rollers provided on the conveyance path, to make it possible to easily determine the setting of this pressure, and to make the configuration as simple as possible. An object of the present invention is to provide a simplified paper conveying device for a copying machine.

In the present invention, a pair of transport rollers for pinching and transporting paper are rotatably provided on a machine body, and the machine body can swing around the same axis as one of the transport rollers and transport the paper. A rocking body forming at least a part of the path is mounted, and the other conveyance roller is movable toward and away from the one conveyance roller on the center line of both conveyance rollers, and is connected to the one conveyance roller by a spring. The oscillating body is elastically biased in the approaching direction, and when the oscillating body is oscillated, the other conveyance roller is moved away from the one conveyance roller against the elastic force of the spring. This is a paper conveyance device for a copying machine characterized by being provided with a cam-shaped push member that is moved away.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a simplified cross-sectional view of one embodiment of the present invention.

An automatic paper feeder 4 is provided at the front of the body 2 of the diazo copying machine.

The automatic paper feeding device 4 includes (a) a photosensitive paper conveying device 10 for conveying the photosensitive paper 6 one by one along a photosensitive paper conveying path 8;
(b) A leading edge aligning device that transports the original along the original transport path 12 and merges it with the photosensitive paper 6 from the photosensitive paper transport path 8 in the merging transport path 14 to precisely align the leading edges of the original and the photosensitive paper. 16.

A document insertion opening 22 is defined by a document insertion table 18 that forms the top cover of the photosensitive paper transport device 10 and a cover 20 that covers the leading edge alignment device 16 .

The original and the photosensitive paper 6 whose leading edges have been aligned and overlapped in the converging conveyance path 14 are guided by a guide plate 24 and led to a printing device 26 .

In the printing device 26, a printing light source 30 and a reflecting plate 32 are provided in a light-transmitting cylinder 23, and an endless conveyor belt 34 is suspended in contact with the outer peripheral wall of the light-transmitting cylinder 28.

The original and the photosensitive paper 6 guided by the guide plate 24 are fed while being sandwiched between the transparent cylinder 28 and the conveyor belt 34, and are then printed.

The original and the printed photosensitive paper 6 are discharged onto a plate 36, and the two are manually separated and only the printed photosensitive paper 6 is supplied to a developing device (not shown).

Note that it is also possible to manually feed the original and the photosensitive paper 6 into the insertion slot 38 from above the cover 20 while stacking them, and supply them to the printing device 26.

2 is a perspective view showing the right side of the automatic paper feeder 4 of the diazo copying machine shown in FIG. 4, FIG. 3 is a simplified right side view thereof, and FIG. 4 is a simplified perspective view thereof. is a diagram,
5 is a cross-sectional view taken along the line ■--■ in FIG. 4, and FIG. 6 is a cross-sectional view taken along the line VI--Vll in FIG.

The photosensitive papers 6 are stored in a stacked manner in the photosensitive paper container 40.

Paper feed roller shafts 7 of a plurality of paper feed rollers 74 come into frictional contact with the uppermost surface 6a of the stacked photosensitive papers 6 near their front ends.
A spring clutch 194 is interposed between the sprocket wheel 6 and a sprocket wheel 160, which will be described later.

The paper feed roller shaft 76 is rotatably supported by the side walls 68, 70 of the body 2.

The paper feed roller shaft 76 is rotated by 360 degrees during paper feeding as will be described later, and as a result, only one sheet of photosensitive paper at the top of the photosensitive paper 6 is fed to the photosensitive paper transport path 8.

The document insertion table 18 is pivoted to one side wall 68 by a pin 90, and is similarly pivoted to the other side wall 70.

Therefore, the document insertion table 18 can be opened and closed freely, and the photosensitive paper container 40 can be opened and closed like the virtual green stone in FIG.
Photosensitive paper 6 can be replenished inside.

In the leading edge aligning device 16, a document inserted through a document insertion port 22 is conveyed through a document conveyance path 12 formed by upper and lower guide plates 120, 122.

A pair of feed rollers 124 and 126, a detection switch 128, a document feed roller 130, and a pressure contact member 132 are sequentially arranged from the top to the bottom of the document transport path 12 (from the left to the right in FIG. 4). Ru.

In the merging conveyance path 14, a pair of delivery rollers 134,
136 and a stop member 138 are sequentially arranged along the conveyance direction.

A shaft 140 of one feed roller 124 is rotatably supported by both side walls 142, 144 of the cover 20.

The shaft 146 of the document feed roller 130 is attached to the side wall 142, 144.
It is pivoted by rolling bearings.

The shaft 148 of one delivery roller 134 is connected to the side wall 68.7.
It is pivotally supported via bearings 153 and 155 by brackets 149 and 151 respectively erected at 0.

Sprocket wheels 150, 152, 154 are fixed to the shaft ends of these shafts 140, 146, 148, respectively, and are driven by a chain 7156.

Another sprocket wheel 158 is secured to the shaft 148.

This sprocket wheel 158 and a sprocket wheel 160 attached to the paper feed roller shaft 76 via a spring clutch 194 are driven by a checker 7162.

The checker 7162 is driven via an electromagnetic clutch 246, which will be described later. Therefore, the feed roller 124, document feed roller 130, and feed roller 134 are rotated when the electromagnetic clutch 246 is in the on state.

The side walls 142, 144 of the cover 20 are supported on a shaft 148 by plain bearings 145, 147.

Therefore, the swinging body 163 including the cover 20, the feed roller 124, the document feed roller 130, the detection switch 128, and the like can swing around the shaft 143.

The electromagnetic clutch 246 is connected to the safety switch 23 as described later.
When the photosensitive paper 6 runs out or when the document insertion table 18 is opened, the automatic paper feeder 4 is turned off and the drive of the automatic paper feeder 4 is stopped.

The shaft 164 of the other feed roller 126 is connected to the side wall 68.7.
0 so as to be vertically displaceable, and is pivotally supported by one end of a pair of swing arms 166.

The other end of the swing arm 166 is connected to the side wall 68 by a pin 168.
．． It is pivoted to 70.

A follower 170 protruding from the swing arm 166 is driven by a cam 172 fixed to the paper feed roller shaft 76 .

FIG. 7 is a perspective view of the vicinity of the end of the shaft 174 of the other delivery roller 136.

The shaft 174 of the other feed roller 136 is connected to the side wall 68.7.
0 vertically displaceable, sliding bearings 175, 176
It is pivotally supported by a pair of elevating pieces 177 and 178 via.

These sliding bearings 175, 176 are
It is fitted into a vertically elongated hole 179° 180 extending in the vertical direction at the upper part of 8 so as to be vertically displaceable.

A sliding bearing 17 is installed at the inner upper part of the elevating piece 177,178.
Spring 183°1 that holds 5°176 and urges upward
85 is installed.

Due to the elastic force of the springs 183, 185, the slide bearings 175, 176 are positioned upward along the longitudinal holes 179, 180.

A vertically elongated hole 18 extending in the vertical direction is provided at the lower part of the elevating piece 178.
1 is provided.

The elevating piece 178 is loosely inserted into this vertically elongated hole 181 and is attached to the side wall 70.
The vertical displacement direction is defined by a pin 182 erected.

The elevating piece 178 has a horizontally elongated hole 18 extending perpendicularly to the vertical displacement direction.
It has 4.

A swing arm 187 is pivotally supported on the side wall 70 by a pin 136.

A pin 188 fixed to one end of the swing arm 187 is loosely inserted into the horizontally elongated hole 184.

A follower 189 fixed to the other end of the swing arm 187 is
It is driven by a cam 190 that is integral with the paper feed roller shaft 76.

The elevating piece 177 has the same structure as the elevating piece 178, and is displaced in the same manner as the elevating piece 178 by a cam that is integrated with the paper feed roller shaft 76.

FIG. 8 is a sectional view showing the spring clutch 194 provided near the end of the paper feed roller shaft 76.

The boss 196 of the sprocket wheel 160 is fitted onto the paper feed roller shaft 76 .

The end plate 197 is fixed to the paper feed roller shaft 76.

A boss 198 that is integral with this end plate 197 is connected to the boss 19
6 and is fitted and fixed to the paper feed roller shaft 76.

Both bosses 196 and 198 are fitted perfectly.
．． A coil spring 200 is inserted over 198.

One end 201 of the coil spring 200 is fixed to the paper feed roller shaft 76 along the end plate 197.

The other end 202 of the coil spring 200 is connected to the coil spring 200.
It is fixed to a rook 192 surrounding 0.

The winding direction of the coil spring 200 is the sprocket foil 1.
60 rotates in the rotation direction 203 and twists the coil spring 200, the coil spring 200 is set in a direction that tightens the bosses 196 and 198.

Therefore, when the pawl 210 is engaged with the rook 192 and rotation of the rook 192 is prevented, the coil spring 2
00 releases force when tightened to the boss 196, so the torque of the sprocket wheel 160 is not transmitted to the paper feed roller shaft 76 via the boss 198.

The electromagnetic plunger 216 is excited and the claw 210 and rook 19
When the coil spring 200 is disengaged from the boss 1
Tighten 96°198, so sprocket wheel 1
A paper feed roller shaft 76 rotates integrally with the paper feed roller shaft 60.

A pawl 210 can be engaged with and disengaged from the rook 192.

The pawl 210 is formed at one end of an arm 214 that is pivotally supported on the side wall 70 by a pin 212.

The other end of the arm 214 is the movable piece 2 of the electromagnetic plunger 216.
18.

When the electromagnetic plunger 216 is not excited, the movable piece 218 is extended as shown in FIG.
0 and the rook 192 are engaged, and accordingly, the power from the sprocket wheel 160 is not transmitted to the paper feed roller shaft 76 by the action of the spring clutch 194.
16 is energized, the movable piece 218 retracts, thereby disengaging the pawl 210 from the rook 192 and disengaging the sprocket wheel 1.
The power from 60 is transmitted to paper feed roller shaft 76 via spring clutch 194, and paper feed roller 74 is rotated.

FIG. 9 shows the detection switch 128 and the electromagnetic plunger 216.
It is an electrical circuit diagram including.

FIG. 9 shows a state where the original is not being conveyed.

One contact 128a of the detection switch 128 is a relay R1.
The other contact 128b is connected in series to the relay switch R1-1 of the relay R2 and the rectifier circuit 226.

A capacitor 228 is connected in parallel to relay R1.

The electromagnetic plunger 21 is activated by the DC output of the rectifier circuit 226.
6 is excited.

Relay switch R1-1 is conductive only when relay R1 is energized.

The detection switch 128 has an actuator 220 that responds to the leading edge of the document being conveyed, and when the actuator 220 is rotationally displaced by the document, the contact 128
The conduction state is switched from a to contact 128b.

When the contact 128a is broken, the relay R1 remains energized for a short period of time corresponding to the amount of electricity charged in the capacitor 228, so that the relay switch R1-1 is activated after the contact 128a is broken. Maintains continuity for a certain amount of time.

Therefore, the electromagnetic plunger 216 is only momentarily energized for the short period of time.

Therefore, after the pawl 210 is removed from the rook 192 and the rook 192 rotates once, the pawl 210 is removed from the rook 192.
re-engage with.

Therefore, when the document is conveyed, the paper feed roller shaft 7
Only a single rotation of 6 is distantly related.

The photosensitive paper transport path 8 is configured such that one revolution of the paper feed roller 74 transports the photosensitive paper 6 a distance sufficient for the leading edge of the topmost sheet of the photosensitive paper 6 to come into contact with the stop member 138 . The length of is set.

Pressing member 13 that presses against the outer peripheral surface of document feed roller 130
2 is made of a metal spring steel material, for example.

Guide plate springs 230 and 232 provided in the document transport path 12
As is clear from FIG. 11, which will be described later, the guide member 13 serves to guide the leading edge of the document to ensure that it comes into contact with the stop member 138.

A guide plate spring 234 provided in the photosensitive paper transport path 8 prevents the leading edge of the photosensitive paper 6 from hitting the stop member 138 when the feed roller 136 is in the lowered position as shown in FIGS. 10 and 11, which will be described later. In addition, when the feed roller 136 rises from the lowered state, it presses the photosensitive paper 6 against the feed roller 136, thereby causing the photosensitive paper 6 to be brought into contact with the upper side of the photosensitive paper transport path 8 ( The document and the photosensitive paper 6 are prevented from returning to the left side in FIG.
36.

To describe the operation, first, as shown in the fourth diagram, the electromagnetic plunger 216 is not excited, so the claw 21 is attached to the water wheel 192.
0 remains engaged, and in response, cam 172 engages follower 1.
Assume that the feed rollers 124 and 126 are pressed against each other by pushing up the roller 70, and the feed rollers 134 and 136 are pressed against each other by the action of the cam 190 and the follower 189.

At this time, the feed rollers 124 and 126, the document feed roller 130, the feed rollers 134 and 136, and the sprocket wheel 160 are constantly rotating.

In this state, when a document is next inserted from the document insertion slot, the document is transported by feed rollers 124 and 126.

Referring to FIG. 10, the leading edge of the document is detected by the detection switch 128.
The actuator 220 is rotated.

Therefore, the switching mode of the detection switch 128 is changed, and the electromagnetic plunger 216 is changed by the electric circuit shown in FIG.
is instantaneously excited.

The arm 214 is then rotated clockwise around the pin 212, disengaging the pawl 210 from the waterwheel 192.

Then, the rotational power from the sprocket wheel 160 is transmitted to the paper feed roller shaft 7 via the spring clutch 194.
6.

Referring to FIG. 11, when the paper feed roller shaft 76 is rotationally driven, a cam 172.190 integrated therewith is
rotates.

In response to the follower 170 of the cam 172, the swinging arm 16
6 rotates counterclockwise around the pin 168 by its own weight, thereby causing one feed roller 124 to separate from the other feed roller 126.

At the same time, in response to the follower 189 of the cam 190, the swinging arm 187 rotates clockwise around the pin 186 under the action of gravity, and the elevating piece 178 descends, thereby moving from one delivery roller 134 to the other. The delivery roller 136 is separated.

Therefore, at the time when the feed rollers 124 and 126 separate from each other,
This is immediately after the leading edge of the document is clamped between the document feed roller 130 and the pressing member 132.

Therefore, even after the feed rollers 124 and 126 are separated, the original is transferred between the document feed roller 130 and the pressure contact member 130.
It is transported by the action of

As the paper feed roller 74 rotates along the paper feed roller shaft 76, only one sheet of photosensitive paper 6 is conveyed to the photosensitive paper conveyance path 8.

The photosensitive paper 6 is moved along the photosensitive paper transport path 8 by the guide plate spring 234.
The leading edge of the photosensitive paper 6 comes into contact with the stop member 138, and further conveyance is prevented while the photosensitive paper 6 is prevented from lifting up.

Therefore, if the paper feed roller 74 continues to rotate after the photosensitive paper 6 has stopped, the photosensitive paper 6 may become slack.

Therefore, it is desirable that the length of the photosensitive paper transport path 8 be selected so that such slack can be suppressed to a level that does not adversely affect accurate alignment of the leading edges of the original and the photosensitive paper 6.

The document that is fed between the document feed roller 130 and the pressure contact member 132 has its leading end connected to the guide plate springs 230 and 23.
2 and comes into contact with the stop member 138.

After the leading edge of the original contacts the stop member 138, the posture of the original is corrected by the force in the conveyance direction applied to the original until the leading edge precisely follows the stop member 138 and thus coincides with the leading edge of the photosensitive paper 6. Ru.

The pressing force between the document feeding roller 130 and the pressing member 132 is set in advance so that the document is stopped without loosening after straightening.

Note that the guide plate springs 230, 232, and 234 are provided so as to extend to the stop member 138, so that mutual interference can be avoided even if the original and the photosensitive paper advance in a deviated manner.

Referring to FIG. 12, when the paper feed roller shaft 76 rotates once, the pawl 210 engages with the waterwheel 192 and the rotation of the paper feed roller shaft 76 is stopped.

At the same time, cam 172.190 displaces follower 170.189 to rotate swing arm 166.187 and raise infeed roller 126 and outfeed roller 136.

Therefore, the feed rollers 124, 126 and the feed rollers 134, 136 are brought into close contact with each other.

In response, the feed rollers 134 and 136 force the document and the photosensitive paper 6, whose edges have been aligned, to move in the conveying direction while keeping them overlapped.

Therefore, the leading edges of both sheets are conveyed over the stop member 138.

As described above, after the leading edge contacts the stop member 138 while the feed rollers 134 and 136 are separated, the document and the photosensitive paper 6 are fed out with the feed rollers 134 and 136 in pressure contact with each other. During the correction time until the original is corrected, the leading edge of the original follows the stop member 138, and the orientation of the original is corrected.

No matter what orientation the original is inserted from the original insertion table 18, in order to correct the original as accurately as possible during this correction time, it is necessary to adjust the position of the actuator 220 of the detection switch 128 along the original transport direction and the original. The outer diameter and rotational speed of the feed roller 130 are appropriately selected.

Referring again to FIG. 3, there is a cam 2 at the end of the rotation shaft 7.2.
33 is fixed.

An actuator 236 of a safety switch 235 is in sliding contact with the peripheral end of this cam 233.

When the photosensitive paper 6 runs out during copying, the large diameter portion 233a of the cam 233 presses the actuator 236.

Therefore, the safety switch 235 switches from its contact 235a (see FIG. 9) to its contact 235b.

Therefore, relay R2 is energized.

Relay switch R2-1 of relay R2 is conductive when relay R2 is in a non-energized state, and is cut off when relay R2 is in an energized state.

By shutting off relay switch R2-1, electromagnetic clutch 246 is turned off.

Accordingly, driving of the chino 162 and sprocket wheel 160 is stopped.

A pin 238 is provided upright on the side surface of the cam 233.

A link 240 having an elongated hole 239 into which a pin 238 is loosely inserted.
is pivotally supported by the document insertion table 18.

Therefore, when the document insertion table 18 is opened like the virtual green stone shown in FIG. 3, the link 240 rotates the cam 233,
The large diameter portion 233b of the cam 233 is connected to the actuator 23.
Press 6 to connect contact 235a of safety switch 235 to contact 2.
Switch to 35b.

In response, the electromagnetic clutch 246 is turned off, and the chenno 16
2 and sprocket wheel 160 stop.

This way, safety is maintained. According to the present invention, the cover 20
Cam-shaped push members 250 and 25 are attached to both side walls 142 and 144 of the
2 is provided.

The pushing members 250, 252 move the swinging pair 163 to the arrow 25.
4, the pair of feed rollers 13
4,136 between the shafts 148, 174, with end surfaces 256, 258 facing away from the axis of one of the feed rollers 134.

Therefore, when the swinging body 163 is rotated in the direction of the arrow 254 as shown in FIG.
Sliding bearing 175°176 of the other delivery roller 136
are in contact with each other.

Moreover, as the rocking body 163 rotates, the end surfaces 256 and 258 press the slide bearings 175 and 176 downward against the elastic force of the springs 183 and 185.

Therefore, the sliding bearings 175, 176 are connected to the vertically elongated hole 179.
180, thus displacing the other delivery roller 136 away from the one delivery roller 134.

If a paper jam occurs while the original and the photosensitive paper 6 are being held between the feed rollers 134 and 136, the swinging body 163 can be rotated around the shaft 148 to open the paper jam.

By doing so, the pushing member 250 provided on the rocking body 163
, 252 connect sliding bearings 175, 176 that hold the shaft 174 of the other delivery roller 136 to springs 183, 185.
Push down against the elastic force of.

Therefore, the pair of delivery rollers 134, 1 are pressed against each other.
36 are separated from each other.

Therefore, the original and the photosensitive paper 6 which were held between the feed rollers 134 and 136 can be easily taken out.

After taking out the original and the photosensitive paper 6, the swinging body 163 may be rotated in the opposite direction of the arrow 254 and returned to its original position as shown in FIG.

Then, the sliding bearings 175 and 176 holding the shaft 174 of the other delivery roller 136 are
is displaced upward along the longitudinal holes 179, 180 by the elastic force of.

Therefore, the other delivery roller 136 is pressed against one delivery roller 134 and returns to its original state.

The present invention is not only implemented with respect to the delivery roller of the diazo copying machine as in the above-mentioned embodiment, but also has one conveyance roller driven through a transmission means and elastically pressed against the one conveyance roller. and the other conveyance roller that is driven by the
The present invention can be widely implemented with respect to a copying machine including a cover that can be rotated around the axis of the one conveyance port.

As described above, according to the present invention, the pushing member is provided on the swinging body that can rotate around the axis of one of the conveying rollers driven via the transmission means, and when the swinging body is opened, the pushing member , the other conveyance roller, which is biased toward the one conveyance roller, is displaced away from the one conveyance roller.

Therefore, it is possible to easily take out paper such as an original and/or photosensitive paper that is pinched between a pair of conveyance rollers and is jammed.

Of the pair of conveyance rollers, one conveyance roller is movable toward and away from the other conveyance roller on the center line of both conveyance rollers.

Therefore, when the other conveyance roller is displaced away from the one conveyance roller against the elastic force of the spring, forces in the conveyance direction and back are applied to the paper that has been clamped by these conveyance rollers. There isn't.

Therefore, the paper will not be damaged by tensile force or the like, and the paper will not be wrinkled.

Furthermore, according to the present invention, the other conveyance roller is elastically urged in a direction approaching the one conveyance roller by the spring.

Therefore, when it is desired to increase or decrease the clamping force, that is, the conveyance force, by these two conveyance rollers, or when the thickness of the filter paper is different after being fed, it is sufficient to replace the springs with different spring constants.

In other words, this is because the clamping force of both conveying rollers is determined by the spring constant of the spring, and as described above in connection with FIG. 15, the clamping force of the receiver does not change depending on the plate 16 in this invention. The clamping force does not change depending on the weight of the rocking body.

Therefore, it is easy to set the clamping force of both conveyance rollers, and the paper conveyance force can be set accurately.

[Brief explanation of the drawing]

Fig. 1 is a simplified vertical cross-sectional view of one embodiment of the present invention;
3 is a simplified right side view of FIG. 2, FIG. 4 is a simplified perspective view of FIG. 3, and FIG. Figure 6 is a cross-sectional view taken along the line ■-■ in Figure 4. Figure 7 is a cross-sectional view taken along the line VI-VI in Figure 5.
The figure is a perspective view of the vicinity of the end of the shaft 174 of the other feed roller 136, and FIG. 8 is an enlarged sectional view of the vicinity of the paper feed roller shaft 76.
Figure 9 is an electric circuit diagram, Figures 10, 11 and 12.
The figure is a perspective view for explaining the operation of the tip alignment device 16, FIG. 13 is a right side view of the vicinity of the pair of delivery rollers 134 and 136 when the swing body 163 is opened, and FIG. A pair of delivery rollers 13 when closed
15 is a simplified right side view of the vicinity of 4,136 and FIG. 15 is a side view of the prior art. 2...Machine body, 4...Automatic paper feeder, 6
...Photosensitive paper, 8...Photosensitive paper conveyance path, 1
0...Photosensitive paper transport device, 12...Document transport path, 14...Combined transport path, 16...
・Tip alignment device, 18...Document insertion table, 20...Cover, 76...Paper feed roller shaft, 124.126...Feed roller, 12
8...Detection switch, 130...Document feed roller, 134.136...Delivery roller, 142, 144...Side wall of cover 20, 163...
...Rolling body, 172°190...Cam, 1
75,176...Sliding bearing, 177.178
...Elevating piece, 183, 185 ... Spring, 192 ... Water wheel, 210 ... Claw, 2
16... Electromagnetic plunger, 250, 252...
...Press member, 256, 258... End face, R
1, R2...Relay, R1-1, R2-1...
...Relay switch.

Claims (1)

[Scope of utility model registration request] A pair of transport rollers for pinching and transporting paper are rotatably provided on a machine body, and the machine body is provided with at least a portion of a path for transporting paper that can swing about the same axis as one of the transport rollers. The other conveyance roller is movable toward and away from the one conveyance roller on the center line of both conveyance rollers, and is elastically moved toward the one conveyance roller by a spring. The rocking body has a cam shape that displaces the other conveyance roller away from the one conveyance roller against the elastic force of the spring when the rocking body is rocked. 1. A paper conveyance device for a copying machine, characterized in that a push member is provided.