JPH0446030B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roll paper holding device.

Conventionally, some facsimile apparatuses have a roll of recording paper disposed deep within the main body of the apparatus, but it is difficult to replace the roll of recording paper when it runs out. Furthermore, in relation to the transmission system, there is a system in which a transmission system reading section is placed above the roll of recording paper, but in this case as well, replacing the roll of recording paper is troublesome.

The present invention was made in view of these points, and there is no risk of staining the paper surface of the roll paper, and
An object of the present invention is to obtain a roll paper holding device that improves the workability of replacing roll paper.

In the present invention, a holder part that is slidable in the longitudinal direction of the roll paper and engages with and disengages from the center of the roll paper is attached to side plate parts disposed facing each other, and this holder part is urged in the direction of the roll paper by a biasing part. a locking portion that holds the holder portion in the non-loading position of the roll paper, which has been slid to the non-loading position against the urging force of the urging portion; and a locking portion that holds the holder portion in the non-loading position. A release part for releasing the locked state is provided. Therefore, since the holder part holds the center of the roll paper, the surface of the recording paper is not soiled, and the holder part that holds the roll paper can be held in the non-mounted position by the locking part. This allows you to easily remove the roll paper with just one hand, and
The release part allows the holder part held in the non-mounted position to be released from the locking part to easily hold the roll paper, thereby greatly improving the workability of replacing the roll paper. It is.

An embodiment of the present invention will be described based on the drawings.
First, FIG. 1 and FIG. 2 schematically show the gist of this embodiment, in which a document table 2 is formed on the front upper surface of the mounting main body 1, a tray 3 is formed on the rear upper surface, and a bridge portion 4 is formed. A document conveying path 5 is formed in which the document is conveyed from the document table 2 to the tray 3 by meeting the documents. Here, the length of the tray 3 in the feeding direction is set to be more than half the length of the standard size (A4 size), so that the document to be read and discharged does not fall from the tray 3. In addition, the bridge part 4
Inside are a feed roller 6, a tension roller 7 pairs, a target glass 8, a guide plate 9 pairs, and a feed roller 1.
It has 11 pairs of zero-tension rollers, a fluorescent lamp 12 that irradiates light onto the document conveyed over the target glass 8, a first mirror 13, a second mirror 14, which receives reflected light from the document, An optical imaging system 16 is provided with a lens 15, and a CCD (Charge-CCD) serving as a reading section is installed at its final position.
A coupled device 17 is attached to the video preamplifier unit 18. These constitute a transmission reading system 19. Here, the first mirror 13 is placed almost directly below the target glass 8, the second mirror 14 is placed horizontally behind it, the lens 15 is placed in front of it in the horizontal direction, and the CCD 17 is used for receiving signals, which will be described later. It is located at the rear of the recording system. Therefore, during reception, the document is conveyed from the front side to the rear on the document conveyance path 5, and the operability of transmitting the document is better than in the left-right horizontal conveyance method.

On the other hand, the receiving and recording system 2 is located on the front side of the apparatus main body 1, that is, before the video preamplifier unit 18 and below the original table 2.
0 is set. This reception recording system 20 includes a roll of recording paper 21 held by a holding mechanism (to be described later) on the lower side, and a thermal head 22 located above the roll of recording paper 21 that performs reception and recording operations while pulling out the roll of recording paper 21. The main element is a pair of platen rollers 23, and a recording paper conveyance path 24 is formed for discharging the rolled recording paper 21 from the lower side to the upper front side. Here, the thermal head 22 is located on the outer circumferential side of the recording paper conveyance path 24, and the recording paper 21 is ejected with the upper surface thereof serving as the recording surface. Further, a sawtooth plate 25 for cutting the rolled recording paper 21 into a predetermined length is provided on the discharge side outward from the platen roller 23. That is, the recorded roll recording paper 21
is cut by the saw board 25 by grasping the distal end of the discharging side and pulling it diagonally downward toward you. Thus, the reception recording system 20 can be divided into two parts with the recording paper transport path 24 as the border, and the thermal head 22 side is fixedly held within the apparatus main body 1, and the recording paper roll 21 and the platen roller 2
3. The inner peripheral side members such as the sawtooth plate 25 are combined into a front cover unit 27 together with the inclined front cover 26 located at the front, and are freely rotatable with respect to the main body 1 of the apparatus about the fulcrum shaft 28. . Therefore, the roll of recording paper 21 can be replaced by tilting the front cover unit 27 toward the front, and since the platen roller 23 is attached to the front cover unit 27 side, the roll of recording paper 21 can be replaced. 21 can be easily replaced. That is, after setting the rolled recording paper 21 along its axis, the leading end of the recording paper is placed on the platen roller 23 and the front cover unit 27 is placed.
All you have to do is close it inside the main body 1 of the device, and there is no need to turn a knob or the like to set it. Further, by opening the front cover unit 27 in this manner, the recording paper conveyance path 24 is divided into two, so that removal processing in the event of a jam and cleaning of the thermal head 22 are facilitated. Further, the front cover 26 is provided with a transparent window 26a through which the remaining amount of the stored roll-shaped recording paper 21 can be visually confirmed.

In addition, in the apparatus main body 1, a tray 3 and a first mirror 13 and a second mirror 14 in the optical imaging system 16 are provided.
A power supply unit 29 is provided between the optical imaging system 16 and the second mirror 14/lens 15 system.
0 is set. Therefore, although the power supply unit 29 generates heat, it is placed away from the recording section formed by the roll recording paper 21 (thermal paper) and the thermal head 22, and is a good unit with very little thermal influence. It will be arranged. Also, the system
The control unit 30 is also placed at a distance on the lower side and is less affected by heat. Furthermore, a display operation panel 31 is provided on the right side of the top surface of the main body 1, counters 32 and 33 are placed on the left front side, and a network control unit panel to be described later is placed on the left rear side.

Next, details of each part will be explained with reference to the drawings from FIG. 3 onwards. First, FIG. 3 shows the constituent members of the document transport path 5, in which a lower guide plate 34 is provided between the document table 2 and the feed roller 6. As shown in FIG. This lower guide plate 34 has a paired upper guide plate 35, and is fixed to a bracket 38 with screws 37 while maintaining the passage distance with a spacer 36 (see FIG. 4).
Further, a lower guide plate 39 is provided between the feed roller 6 and the target glass 8, and as shown in FIG. It is fixed to a bracket 42 for the target glass 8. Here, the pair of guide plates 39 and 40 are provided with a mechanism for detecting the leading edge of the document. That is, the fluorescent lamp 12 provided below the lower guide plate 34 is used as a light source, and transmitted light windows 43 and 44 are formed in both guide plates 39 and 40, and a light source is provided at the position of the transmitted light window 44. A support plate 45, a slit plate 46, a spacer 47, a sensor PC board 48, and an insulating plate 49 are fixed with screws 50. The bracket 42 is fixed to the side plate 51 with screws 52, and has a large square hole 53 for transmitting light, a boss 54, and a hole 5.
5. Target glass 8 via cushion 56
is fixed by stepped screws 57. Here, a pair of reflecting plates 58 are provided above the target glass 8 and also serve as document holding guide plates. When the target glass 8 is attached to the reflective plate 58 using the stepped screws 57, a plate screw 59 is interposed, and the groove and the receiving portions 61 at both ends are pressed downward by the forked elastic bending piece 60 so that the reflector plate 58 can be attached or detached. Retained. In this case, the target glass 8
The gap between the reflector plate 58 and the reflector plate 58 is maintained by half-opening protrusions 62 on the lower surface of both ends of the reflector plate 58. That is,
The reflecting plate 58 can be easily attached and detached, and removal processing when a document is jammed and cleaning of the target glass 8 can be easily performed. Also,
The feed roller 10 and the tension roller 11 are bumper-shaped rollers to improve document conveyance performance, and a pair of upper and lower guide plates 63 and 64 are provided between the tray 3 and the tray 3, as shown in FIG. is provided and fixed to the side plate 51 with screws 65.
Note that the document table 2 and the tray 3 are integrally formed with the upper cover of the apparatus main body 1.

Next, FIG. 7 shows a drive system for the feed rollers 6, 10. First, the shafts 66 and 67 of the feed rollers 6 and 10 are connected to the side plate 51 through bearings 68 and 69.
are inserted into the holes 70, 71 of the spacers 72, 73.
Pulleys 74 and 75 are attached via.
Also, the side plate 51 is positioned below the holes 70 and 71.
A hole 76 and a threaded hole 77 are formed in the shaft body 78 , and an adjustment bracket 80 having a vertically elongated adjustment hole 79 is attached with a screw 81 . The shaft body 78 of this adjustment bracket 80 has pulleys 82 and 8.
A two-stage pulley 84 having a diameter of 3 is attached via a bush 85. A hole 87 for attaching the step motor 86 is formed in the side plate 51 together with a horizontally long adjustment hole 88.
6 screw 89 is inserted into adjustment hole 88 and nut 90 is inserted.
Fixed by This staple motor 86
A pulley 92 is fixed to a motor shaft 91. Between the pulleys 92 and 83, the pulley 74,
Timing belt 9 is installed between 75 and 82, respectively.
3,94 are installed. Therefore, the timing belt 9 is rotated by the rotation of the step motor 86.
The feed rollers 6 and 10 rotate via the rollers 3 and 94,
The tension rollers 7 and 11 are driven to rotate. Here, a vertically elongated hole 95 is formed above the hole 70 of the side plate 51, and a hole 99 opposite to the hole 95 is attached to a hole 96 at the back thereof with a screw 98 via a spacer fulcrum 97, and is rotatable. A tension lever 100 is provided, in which a shaft 101 of the tension roller 7 is connected to a bearing 102 through holes 95 and 99.
Supported by Since a spring 103 is engaged with the tension lever 100, the tension roller 7 is supported and pressed against the feed roller 6 side. Tension roller 1
The same applies to the tension mechanism on the first side. Here, the tension of the timing belts 93 and 94 is adjusted by adjusting the step motor 86 horizontally along the hole 88 and adjusting the adjusting bracket 80 vertically along the hole 79.

Next, the optical imaging system 16 will be explained. Figure 8 shows the basic imaging process, and 10
Reference numeral 4 indicates a document reading line on the document on the target glass 8. Here, the specific adjustment means will be described later, but to explain the outline of the adjustment of the optical system, first, the focus adjustment is performed using the lens 15 as shown by arrow A.
This is done by moving the position back and forth. Also,
To adjust the magnification, use the lens 15 as shown by arrow B.
This is done by moving the CCD 17 back and forth together. The optical path angle is adjusted by vertically rotating the second mirror 14 as shown by arrow C. The reading line inclination adjustment is performed by separately moving the left and right sides of the second mirror 14 back and forth as shown by arrow D. The horizontal adjustment of the reading line is performed by moving the video preamplifier unit 18 having the CCD 17 left and right as shown by arrow E.

Here, the mechanism around the fluorescent lamp 12 is shown in FIG. First, the fluorescent lamp 12 is held by a fluorescent lamp holder 105 and can be freely removed and removed to the left on the substantially U-shaped portion of the bracket 38 to which the lower guide plate 34 is attached, using the lower guide plate 34 as a guide. Yes, the fluorescent lamp 12 can be replaced. On this bracket 38 is a fluorescent lamp 1.
A shading plate 106 covers the upper surface side of 2.
is attached with a screw 107 so as to be freely adjustable in the front-back direction. Therefore, flatness adjustment is performed by moving this shading plate 106 back and forth as shown by arrow F. Also,
A square hole 108 is formed on the front left side of the bracket 38, and a slit plate 109, a spacer 110, a sensor PC board 111,
An insulating plate 112 is attached with screws 113. Furthermore, a bracket 114 is welded and fixed to the lower surface of the lower guide plate 34 (not shown in FIG. 9) attached to the bracket 38, and rotates around a fulcrum shaft 115 attached to this bracket 114. A freely supported lever 116 is provided. This lever 116 is the upper and lower guide plate 3
A document receiving piece 119 that protrudes into holes 117 and 118 formed in holes 4 and 35 and receives the leading edge of the document being conveyed.
is provided, and a pressing piece 122 for operating the operating piece 121 of the micro switch 120 is formed on the lower end side. This micro switch 120 is attached by screws 125 to a bracket 124 which is fixed to bracket 38 by screws 123. Therefore, the leading edge of the document is on the document receiver 1.
19, the lever 116 rotates and its pressing piece 122 pushes the operating piece 121, whereby the micro switch 120 detects the leading edge of the document.

Further, FIG. 10 shows the installation and adjustment of the second mirror 14. Both ends of the second mirror 14 are sandwiched between a presser plate 127 via a cushion 126 and a screw 1
28 to the bracket 129. Here, horizontal surfaces 1 are provided on both ends of the base 130 of the reading section.
Support stand 1 that regulates two surfaces, 31 and vertical surface 132
33 is formed, and this support stand 133 has an elongated hole 1 along the front-rear direction so as to be able to adjust the movement in the front-rear direction.
A bracket 136 is provided which is attached by screws 135 through 34. A bent piece 138 to which an adjusting screw 137 is attached is formed on the rear side of this bracket 136, and a receiving piece 1 that receives the tip of the adjusting screw 137 and regulates the position of the bracket 136.
39 is provided on the base 130. and,
This bracket 136 has the bracket 129
A shaft body 140 that rotatably supports the is provided. Thus, an adjustment screw 142 is provided which is screwed onto the bracket 136 through an elongated hole 141 on the horizontal surface of the bracket 129, and an adjustment screw 142 which is screwed onto the bracket 136 side through an elongated hole 143 on the vertical surface of the bracket 129. Bracket 129
A screw 144 is provided for fixing. Therefore, the left and right tilt of the reading line is adjusted by moving the left and right brackets 136 of the second mirror 14 in the front and rear directions indicated by arrows D, respectively. That is, by turning the adjusting screw 132 whose tip is pressed against the receiving piece 139, the bracket 136 is moved with this receiving piece 139 as a reference and regulated on two sides by the horizontal plane 131 and the vertical plane 132.
After determining its position, it is fixed with screws 135. On the other hand, the optical path angle is adjusted by rotating the left and right brackets 129 of the second mirror 14 about the shaft 140 as shown by arrow C. That is, the bracket 129 is in a state where the side where the second mirror 14 is attached (the near side) is heavy and is biased counterclockwise in FIG.
It is regulated by an adjustment screw 142, and after adjusting the amount of rotation with this adjustment screw 142,
The position is fixed to the bracket 136 by screws 144. The reason for the existence of such an adjustment for the second mirror 14 is that the conventional lens with a constant optical path length is used to make it more compact in terms of space. There are things I don't do.

FIG. 11 shows the installation and adjustment of the vicinity of the lens 15 and CCD 17. The lens 15 is installed in a lens barrel block 145, and the lens barrel block 145 is connected to a lens holder 146 by its screw portion so as to be freely forward and backward, and is set to be fixed by a fixing ring 147. has been done. Here, base 130
is provided with a support stand 150 having two regulating surfaces, a horizontal plane 148 and a vertical plane 149, similar to the support stand 133, and this support stand 150 has a support stand 150 having two regulating surfaces, a horizontal plane 148 and a vertical plane 149. It is attached with screws 152 through elongated holes 151 along the . In addition, this lens holder 146
A bent piece 154 to which an adjusting screw 153 is attached is formed on one end side, and a receiving piece 155 is provided on the base 130 for receiving the tip of the adjusting screw 153 and regulating the position of the lens holder 146. Furthermore, on the front side of this lens holder 146,
Video preamplifier with CCD17 installed
The base plate of the unit 18 is attached to the unit 18 by screws 157 through a horizontally long hole 156 so as to be adjustable in the left and right direction. Here, a substantially L-shaped adjustment plate 158 is provided on one end side of the video preamplifier unit 18.
is fixed with a screw 159, and the video preamplifier unit 1 is connected via this adjusting plate 158.
8 Adjustment screws 161 are screwed into the adjustment plate 158 through the horizontal elongated holes 160 of the side plate 51 to adjust the left-right position of the board, and fixing screws 16 are screwed into the screw holes 162 of the side plate 51 and press the adjustment plate 158.
3 are provided. Therefore, the focus adjustment is performed by adjusting the lens barrel block 145 relative to the lens holder 146, and therefore the lens 15, back and forth (arrow A), and is fixed by a fixing ring 147. Also, magnification adjustment is done with lens 15.
After positioning the lens holder 146 having the CCD 17 by moving it back and forth in the direction of arrow B with respect to the receiving piece 155 using the adjusting screw 153 while aligning the lens holder 146 with the horizontal surface 148 and the vertical surface 149 of the support base 150,
It is fixed at 2. Further, to adjust the reading line horizontally, adjust the adjusting plate 158 in the horizontal direction shown by arrow E with the adjusting screw 161, position it with the fixing screw 163, and then adjust the lens holder 1 with the screw 157.
Fixed at 46.

By the way, the side plate 51 is fixed to the side surface of the base 130 with screws 164, and this base 130 is fixed with screws 166 to a stay 165 attached to the main body frame (described later), so that the reading system can be made into a unit. (Figure 12).

Next, the reception recording system 20 will be explained.
First, FIG. 13 shows the constituent members of the recording paper conveyance path 24, in which the rolled recording paper 21 passes through the guide plate 167, the jam detection roller 168, the thermal head 22, and the platen roller 23, and is received and recorded. , and then cut by sawtooth plate 25 as necessary. Here, the platen roller 23 is the first
As shown in Figure 4, the bearing 1 is placed between the side plates 169 and 170.
71, and a pulley 172 is fixed to one end on the side plate 170 side. Further, a step motor 176 is installed at a predetermined position in the side plate 170 through a horizontally long hole 173 with a screw 174 and a nut 175 so as to be adjustable in its longitudinal position, and a pulley 178 is fixed to the motor shaft 177. Furthermore, the side plate 170 has a vertically long hole 1.
An adjustment plate 181 is provided which is fixed via screws 180 via screws 180 so as to be vertically adjustable. The shaft body 182 of this adjustment plate 181 has a bush 183.
A two-stage pulley 186 having a small diameter pulley 184 and a large diameter pulley 185 is attached via the. Timing belts 187 and 188 are stretched between the pulley 178 and the large diameter pulley 185, and between the pulley 172 and the small diameter pulley 184, respectively. Therefore, the plate roller 23 is connected to the step motor 1.
76 and rotates via timing belts 187 and 188. Here, the belt tension is adjusted by moving the step motor 176 back and forth and adjusting plate 1.
It is adjusted by moving 81 up and down.

Further, the side plate 169 has a shape as shown in FIG. 15, and is fixed to the front cover 26 with screws 189. This side plate 169 has an insertion hole 19 so that it can rotate freely around a fulcrum shaft 28 fixed to the main body frame which is the center of the front cover unit 27.
0 is formed and biased in the opening direction by a torsion spring 191. And this torsion spring 19
Stopper 192 and locking hole 1 for regulating both ends of 1
93 is provided. In addition, this side plate 169,
Therefore, in order to lock the opening operation of the front cover unit 27, a pin 194 is provided on this side plate 169, and a spring 19 is attached to the pin 194.
A lock lever 197 is provided which is biased by a lock lever 197 and is rotatable about a shaft 196. Therefore, the shaft 196 supported on the main body frame side is rotated by a mechanism not shown, and the lock lever 1 is rotated.
By releasing the pin 97 from the pin 194, the front cover unit 27 can be opened. Here, the front cover unit 27 has a three-piece structure including the side plate 169, the side plate 170, and a middle side plate located inside the side plate 170 and described later.
69 and the middle side plate are connected by a stay (not shown), a bracket 198, and a sawtooth plate 25, and the side plate 17
0 and the middle side plate are also connected by a stay (not shown), the side plates 169 and 170 are connected by a stay 199, and the middle side plate is aligned by fitting the hole of this stay 199 and the shaft. A square hole 200 is formed in the bracket 198.
A reflective sensor 201 that detects the presence or absence of recording paper 21 via a PC board 202 is connected to a bracket 198 by a screw 204 via a spacer 203.
installed on.

Further, the roll-shaped recording paper 21 is held by a paper tube 205 that is rotatably held on its axis by a holder 206, as shown in FIG. Here, the holder 206 is fixed by a screw 210 to a slide shaft 209 that is inserted through a hole 208 in the middle side plate 207, and the other end of this slide shaft 209 is inserted into a hole 211 in the side plate 170. The middle side plate 207 and the side plate 170 constitute a side plate part, and the slide shaft 209 and the holder 206, which are fixed and integrated with the screws 210 as described above, constitute a holder part. . The slide shaft 209 is urged toward the rolled recording paper 21 by a spring 214 that is attached to the groove 212 or provided between the ring-shaped receiving piece 213 and the side plate 170 and acts as an urging section. . Note that a holder that holds the left side or the opposite side of the rolled recording paper 21 is similar to the holder 206, but serves as a reference for positioning the recording paper, and is fixed inside the side plate 169. Then, on the outside of the side plate 170, a stepped screw 215 is positioned near the hole 211.
A lever 217 is provided so as to be rotatable around the lever 217 and biased in the locking direction by a spring 216. That is, the locking portion 218 of the lever 217 can be engaged with and disengaged from the groove 219 of the slide shaft 209. The lever 217 provided with the locking portion 218 is biased by a spring 216 and is rotatably attached around the stepped screw 215, so that the holding of the holder portion by the locking portion 218 is released. It also acts as a release part. Therefore, although the front surface (outer circumferential surface) of the roll-shaped recording paper 21 serves as a recording surface, the outer circumferential surface will not be damaged because its axis is held instead of being held by dropping it in the conventional manner. In addition, the paper tube 205 that remains when replacing the rolled recording paper 21
When the holder 206 is pushed toward the middle plate 207 side,
The slide shaft 209 also moves outward, and its groove 219 engages with the locking portion 218 of the lever 217 and is locked. Thereby, the paper tube 205 can be attached and detached. When setting a new roll of recording paper 21, the paper tube 205 is moved to the holder 206.
When the lever 217 is rotated clockwise to disengage the slide shaft 209, the slide shaft 209 moves inward due to the force of the compression spring and holds the rolled recording paper 21. Therefore, the work of replacing the rolled recording paper 21 can be easily performed.

Next, the jam detection roller 168 is opposed to the bracket 198, and is held by a bracket 221 attached to a stay 226 via a bearing 222, as shown in FIG. There is. Therefore, the recording paper 21 is sandwiched between the bracket 198 and the jam detection roller 168, and because of this bracket 198, even if the diameter of the rolled recording paper 21 changes, the feeding state of the recording paper 21 remains unchanged. Nothing will change. When the recording paper 21 is moved by the platen roller 23, the jam detection roller 168 rotates due to the frictional force between the jam detection roller 168 and the paper (contact pressure by the spring 223). Here, a slit disk 224 is fixed to one end of the jam detection roller 168, and is detected by an optical jam sensor 225, thereby detecting a jam and a paper end.

On the other hand, FIG. 18 shows the installation of the thermal head 22. The thermal head 22 is fixed to a stay 226 fixed to the main body frame via a bush 229 formed by a stepped screw 227 and a compression spring 228. It is set to apply contact pressure to the platen roller 23 that comes into contact with it. Therefore, the thermal head 22 remains fixed within the main body 1 even when the front cover unit 27 is opened, and the thermal head 22 will not be damaged.

By the way, FIG. 19 shows the frame structure of the entire device, in which the aforementioned fulcrum shaft 28, shaft 196, stay 226, and stay 165 are installed between the main body frame 230, and a power supply unit 29 is installed on the rear side. Stays 231 and 232 for use are attached. The system control unit 30 is fixed to the lower part of the stay 165 with a spacer 233 interposed therebetween and a screw 234. Note that 235 is a rubber foot. Further, as shown in FIG. 20, the network control unit board 236 is held by a holding portion 238 of a bracket 237 attached to the stay 165, and its upper side is fixed to the stay 232 by screws 239. Further, as shown in FIG. 21, a bracket 241 is fixed to the main body frame 230 with screws 240, and an operation port board 242 for the display operation panel 31 is fixed to the upper front side of the main body frame 230 with screws 243.
Further, as shown in FIG. 22, the counters 32 and 33 are fixed by screws 246 to a bracket 245 fixed to the lower front side of the left main body frame 230 by screws 244.

Incidentally, although the sawtooth plate 25 is shown fixed in FIG. 15, safety measures are taken in this embodiment as shown in FIG. 23. That is, the sawtooth plate 25 is not directly fixed to the side plate 169 or the middle side plate 207, but is attached to a protective cover 248 rotatably attached around a fulcrum pin 247. This protective cover 248 is biased clockwise by a torsion spring 251 engaged in holes 249 and 250. Therefore, when cutting the rolled recording paper 21, as shown in FIG.
48 together with the sawtooth plate 25 against the torsion spring 251 until it hits a stopper (not shown), the sawtooth plate 25 becomes effective and the recording paper 21 is cut without being hindered by the protective cover 248. . On the other hand, after opening the front cover unit 27,
When closing the main unit 1 again, remove the protective cover 24.
No counterclockwise force is applied to the sawtooth plate 8, and the force of the torsion spring 251 causes the sawtooth plate 25 to rotate and retreat in the clockwise direction as shown in FIG. It is safe because 25 is hidden.

On the other hand, regarding the rolled recording paper 21 as well, the 16th
The present invention is not limited to what is shown in the figure and can be improved. FIG. 25 and FIG. 26 show a modification thereof. That is, in this modification, the rolled recording paper 21
This paper focuses on the fact that the paper tube 205 that is left behind when the paper runs out is replaced by moving the paper tube 205 to the right in the figure and moving the slide shaft 209 outside the side plate 170. That groove 21
9 to engage the lever 252 to lock the slide shaft 209. This lever 252 is rotatably attached to the side plate 170 about a fulcrum 253, and is biased in the locking direction by a spring 216. Thereby, the rolled recording paper 21 can be replaced as in FIG. 16. Here, below the slide shaft 209, there is a slide shaft 256 that is slidable between the middle side plate 207 and the side plate 170, has a release button 254 at the rear end, and has a tapered release part 255 at the tip that locks with the lever 252. 257 and is biased to the left via a receiving piece 258. Therefore, when setting a new roll of recording paper 21, the paper tube 205 is moved to the holder 206, since the diameter of the paper has increased as shown by the dashed line.
When hitting the release button 25, the end surface of the recording paper
4, press the slide shaft 256, rotate the lever 252 slightly counterclockwise using the taper release portion 255 at its tip, and release the previous engagement between the lever 252, the slide shaft 209, and the groove 219. unlock. So, slide shaft 2
09 is pushed by the spring 214 and returns to the holding direction,
The paper tube 205 is held by the holder 205. Therefore, compared to FIG.
There is no need to release the button manually, further improving operability. Note that the release button 254 does not touch the end surface of the recording paper in the normal state after setting, and also when moving the paper tube 205 to the right,
It is desirable to be sufficiently far away from the passing position of the paper tube 205 so as not to be released by the paper tube 205. Also, the 27th
The figure and FIG. 28 show different modifications,
A lever 261 is provided inside the middle plate 207 and is rotatable about a fulcrum 260 and biased in the locking direction by a spring 216. and the operating section 263 are formed in a bifurcated shape. This operating section 263 is located outside the paper tube 205 and near the new roll diameter. Therefore, the engagement between the lever 261 and the groove 219 can be prevented by manually operating the operating section 263 in the direction of the arrow when setting, or by pressing down in the axial direction using the end surface of the recording paper. Can be canceled.

As described above, the present invention has a holder part which is slidable in the longitudinal direction of the roll paper and which is detachable from the center of the roll paper, which is attached to the side plates disposed opposite to each other, and the holder part is moved by the biasing part to the roll paper. a locking portion that holds the holder portion in the non-loading position of the roll paper, which has been slid to the non-loading position against the urging force of the urging portion; The holder part is equipped with a release part that releases the locked state, and the holder part holds the center of the roll paper, so it does not stain the paper surface of the recording paper and also holds the roll paper. The holder part can be held in the non-mounted position by the locking part, which makes it possible to easily remove the roll paper with only one hand.Furthermore, the holder part held in the non-mounted position can be held in the non-mounted position by the release part. It is possible to easily hold the roll paper by releasing it from the locking portion, which has the effect of greatly improving the workability of replacing the roll paper.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is an external perspective view, FIG. 2 is a schematic cross-sectional side view, FIG. 3 is a perspective view of the document conveyance path, and FIGS. 4 to 7. The figure is an exploded perspective view of each part of the document conveyance system, Figure 8 is a perspective view for explaining the optical system, Figures 9 to 12 are exploded perspective views of various parts of the optical imaging system, and Figure 13 is an exploded perspective view of the recording paper conveyance path. Perspective views, Figures 14 to 18 are exploded perspective views of each part of the reception recording system, Figure 19 is an exploded perspective view showing the frame structure, Figure 20 is an exploded perspective view showing NCU installation, and Figure 21 is operation port installation. FIG. 22 is an exploded perspective view showing counter mounting, FIG. 23 is an exploded perspective view showing a modified example of sawtooth plate mounting, FIGS. 24 a and b are side views showing its operation, and FIG. 26 is a front view showing a modified example of recording paper holding, FIG. 26 is a side view thereof, FIG. 27 is a front view showing a different modified example, and FIG. 28 is a side view thereof. 1...Device main body, 5...Document transport path, 16...
Optical imaging system, 17...CCD (reading unit), 19...
Transmission reading system, 20... Receiving recording system, 21... Rolled recording paper, 22... Thermal head, 23...
Platen roller, 24... Recording paper conveyance path, 27...
...Front cover unit, 29...Power supply unit, 3
0...System control unit.

Claims (1)

[Scope of Claims] 1. Side plates disposed to face each other, a holder fixedly provided to engage and disengage from the center of the roll paper, and a holder attached to the side plates facing the holder to extend along the longitudinal direction of the roll paper. a holder part that is slidable in the direction and engages and disengages from the center of the roll paper; a biasing part that biases the holder part in the direction of the roll paper; and a maximum movement amount of the holder part in the direction of the roll paper. a retaining piece for holding the holder portion in the non-installation position of the roll paper, which has been slid to the non-installation position against the urging force of the urging portion; A roll paper holding device comprising: a release section formed by a lever that manually releases the locked state of the holder section.