JPH0467387B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording apparatus that records using a thermal head.

Conventionally, in this type of recording device, a roll of recording paper is used, and the recording paper is conveyed and recorded by being held between a thermal head and a platen roller that are pressed against each other. . Therefore, when replacing the recording paper, it is difficult to insert the recording paper between the thermal head and the platen roller when setting a new recording paper, and when removing the recording paper, it is difficult to insert the recording paper between the thermal head and the platen roller.
The recording paper sandwiched between the thermal head and the platen roller must be forcibly pulled out, which may damage the thermal head. Furthermore, the recording paper may be pulled out by separating the thermal head and the platen roller with a finger or the like, but such work is extremely inefficient.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a recording apparatus in which the workability of replacing recording paper is good and there is no risk of damage to the thermal head.

The present invention provides a platen roller 23 connected to and driven by a motor 178 and rotatably held on a side plate 170, a manual rotation knob 174 coupled to the platen roller 23, and a driving force applied to the recording paper 21. a tension roller 167 that presses the recording paper 21 against the platen roller 23;
The platen roller 2 is held by a bracket 185 rotatably attached to the side plate 170.
3, an opening formed in the apparatus main body 1 to a size that allows the recording paper 21 to be replaced, and a lid 26 provided in the apparatus main body 1 so as to be openable and closable to close the opening. And this lid part 2
The thermal head 22, the platen roller 23, and the tension roller 167 are connected to the main body of the apparatus. 1, and when the lid part 26 is opened, the bracket 185 is interlocked and driven via the slide lever 191, the thermal head 22 and the platen roller 23 are separated, and the knob 174 is Grip the platen roller 23
By rotating the recording paper 21, the recording paper 21 is fed to the printing position. Therefore, when replacing the recording paper 21, the slide lever 1
Since the thermal head 22 and the platen roller 23 are separated by the bracket 185 that is linked to the thermal head 22 and the platen roller 23, it is easy to insert and pull out the recording paper 21, and there is no risk of damaging the thermal head 22. Separation from the roller 23 is performed by opening the cover 26 and the interlocking action of the slide lever 191 acting on the bracket 185, so there is no need for any special operation. When the platen roller 23 is rotated by rotating the knob 174, the platen roller 23 is driven in conjunction with the platen roller 23, which eliminates the need to manually rotate the conveying part including the platen roller 23, which prevents the conveying part from getting dirty. It can be driven and even an inexperienced operator can set it at the correct recording position, thereby greatly improving work efficiency when replacing recording paper.

An embodiment of the present invention will be described based on the drawings.
First, FIGS. 1 and 2 schematically show the gist of this embodiment, in which a document table 2 is formed on the front upper surface of the main body 1, a tray 3 is formed on the rear upper surface, and a bridge section 4 is formed. A document transport path 5 is formed through which the document is transported from the document table 2 to the tray 3. 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 pair, a target glass 8, a guide plate 9, 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 with a lens 15 is provided, and a CCD (Charge-coupled device) 1 is installed at its final position.
7 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, and the second mirror 14
is placed horizontally behind it, the lens 15 is placed horizontally in front of it, and the CCD 17 is placed at the rear of a receiving and recording system, which will be described later. Therefore, during transmission, 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 and a platen roller 23 located above the roll of recording paper 21 and performing reception and recording operations while pulling out the roll of recording paper 21. A recording paper transport 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 roll-shaped recording paper 21 into a predetermined length is provided outside the thermal head 22 on the discharge side. That is, the recorded rolled recording paper 21 is cut by the sawtooth plate 25 by grasping the distal end thereof and pulling it diagonally upward toward the user. Thus, the thermal head 22, the platen roller 23, and the sawtooth plate 25 are fixedly held within the apparatus main body 1, and the rolled recording paper 21 is attached to the front cover unit 27, which is unitized with the inclined front cover 26 located at the front. The front cover unit 27 is freely rotatable relative to the main body 1 about a fulcrum shaft 28. That is,
The front cover 26 covers the recording paper 21 on the main body 1 of the apparatus.
It acts as a lid that closes an opening formed in a size that allows for replacement. Therefore, the roll of recording paper 21 is replaced by tilting the front cover unit 27 toward the front, and since the platen roller 23, thermal head 22, etc. are not attached to the front cover unit 27, Also, the roll-shaped recording paper 21 can be easily replaced and set. That is, after the roll-shaped recording paper 21 is dropped and set, the front cover unit 27 may be closed inside the main body 1 of the apparatus. Furthermore, a roll of recording paper 21 stored and held in the front cover 26
A transparent window 26a is provided so that the remaining amount of water 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 glass 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 reflector plate 58 using the stepped screws 57, a plate spring 59 is interposed, and its forked elastic bending piece 60 pushes the groove and the receivers 61 at both ends downward, allowing it to be attached and detached. Retained. In this case, the target glass 8
The gap between the reflector plate 58 and the reflector plate 58 is maintained by a convex portion 62 by half-opening 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 step motor 86
A pulley 92 is fixed to a motor shaft 91. Between the pulleys 92 and 33, 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 is rotatable about a fulcrum shaft 115 attached to this bracket 114. A supported lever 116 is provided. This lever 116 is connected to the upper and lower guide plates 34,
A document receiving piece 119 that protrudes into the holes 117 and 118 formed in the hole 35 to receive the leading edge of the conveyed document is provided, and a pressing piece 1 that operates the actuating piece 121 of the micro switch 120 is provided on the lower end side.
22 is formed. This micro switch 1
20 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 receiving piece 119.
When the lever 116 reaches this point, the lever 116 rotates and its pressing piece 122 pushes the actuating piece 121, so that the micro switch 120 detects the leading edge of the document.

Further, FIG. 10 shows the installation and adjustment of the second mirror 14. This second mirror 14 is held at both ends by a presser plate 127 via a cushion 126, and the 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 adjustment screw 132 whose tip is pressed against the receiving piece 139, the bracket 136 is moved with the receiving piece 139 as a reference and regulated on two sides by the horizontal plane 131 and the vertical plane 132, and its position is determined. Afterwards, 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 heavier on the side where the second mirror 14 is attached (the front side), and the side on which the second mirror 14 is attached is heavier.
In the figure, it appears to be biased counterclockwise, and is regulated by the adjustment screw 142.
After adjusting the amount of rotation with this adjustment screw 142, the position is fixed with respect to the bracket 136 with a screw 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. There is. Here, the base 130 has a horizontal surface 148 and a vertical surface 14 as well as the support stand 133.
A support stand 150 having two regulating surfaces of 9 and 9 is provided, and the support stand 150 has two regulating surfaces.
46 is attached with a screw 152 through an elongated hole 151 along the front-rear direction so that it can be moved and adjusted in the front-rear direction. Further, a bent piece 154 to which an adjusting screw 153 is attached is formed on one end side of this lens holder 146, and a receiving piece 154 that receives the tip of the adjusting screw 153 and regulates the position of the lens holder 146.
55 is provided on the base 130. moreover,
This lens holder 146 has a CCD 1 on the front side.
The board of the video preamplifier unit 18, on which the video preamplifier unit 7 is attached, is attached with screws 157 through its horizontally elongated hole 156 so as to be adjustable in the left and right direction. Here, video preamp unit 1
A substantially L-shaped adjusting plate 158 is attached to one end of the screw 1.
59, and the horizontal elongated hole 1 of the side plate 51 is used to adjust the left and right position of the video preamplifier unit 18 board via this adjustment plate 158.
Adjustment screws 161 are screwed to the adjustment plate 158 via screws 60, and fixing screws 163 are screwed into screw holes 162 of the side plate 51 and press the adjustment plate 158. Therefore, focus adjustment is performed by the lens barrel block 14 relative to the lens holder 146.
5. Therefore, the front and rear adjustment of the lens 15 (arrow A)
It is fixed by a fixing ring 147. Also, magnification adjustment is done by lens 15 and CCD 17.
A support stand 150 supports the lens holder 146 having
It is moved back and forth in the direction of arrow B with respect to the receiving piece 155 using an adjustment screw 153 while aligning it along the horizontal plane 148 and vertical plane 149 of , and after positioning, it is fixed with a screw 152. Further, to adjust the reading line horizontally, the adjusting plate 158 is adjusted in the horizontal direction indicated by arrow E using the adjusting screw 161, and after positioning using the fixing screw 163, the adjusting plate 158 is fixed to the lens holder 146 using the screw 157.

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. There is.

Next, the reception recording system 20 will be explained.
First, FIG. 13 shows the general arrangement, in which the rolled recording paper 21 is received and recorded by passing through the thermal head 22 and platen roller 23 via the tension roller 167 and guide plate 168, and then passes through the guide plate 169. It is cut by a sawtooth plate 25 as necessary. Here, the platen roller 23 is attached between side plates 170 via bearings 171, as shown in FIG.
A pulley 173 is fixed thereto, and a knob 174 for manual rotation is also attached. Further, a step motor 178 is attached to a bracket 176 that can be vertically adjusted by using a vertically long hole 177 that is supported apart from the side plate 170 by a shaft 175.
9 and a nut 180, and a pulley 182 is fixed to the motor shaft 181.
A timing belt 183 is stretched between the pulleys 173 and 182, and its tension is adjusted by adjusting the vertical movement of the bracket 176.

FIG. 15 shows how the thermal head 22 is attached to and separated from the platen roller 23. This thermal head 22 is basically supported at both ends by a bracket 185 rotatably attached to a side plate 170 by a fulcrum shaft 184, and its position can be adjusted by an elongated hole 186 and a screw 187. ing. Here, in order to bring the thermal head 22 into pressure contact with the platen roller 23, the guide pin 1 is fixed to the bracket 185 by caulking.
A spring 190 is locked between 88 and a screw 189 screwed onto the side plate 170. A slide lever 1 is used to release the pressure on the thermal head 22 and move it away from the platen roller 23.
91 is attached to the side plate 170. That is, this slide lever 191 has a vertically elongated hole 192 and is movable up and down using a guide bush 194 fixed to the side plate 170 with a screw 193 as a guide, and has a hole 1 on the upper end side in which a guide pin 188 is engaged.
95 is formed, and a vertically elongated hole 196 is formed in the center to allow the screw 189 to escape. In addition, the side plate 170
The end of the fulcrum shaft 28 of the front cover unit 27, which is rotatably supported via a bearing 197 attached to the front cover unit 27, extends to the lower end of the slide lever 191.
Notch flat portion 19 that receives lower end edge 198 of slide lever 191 when front cover unit 27 is closed
9 is formed. Such a notched flat portion 19
The fulcrum shaft 28 having 9 serves as an interlocking part that interlocks the front cover 26 as a lid part and a separation part to be described later. Therefore, normally, the lower edge 198 of the slide lever 191 is engaged with the notched flat portion 199,
The thermal head 22 is in pressure contact with the platen roller 23, but as will be described later, the front cover unit 27 is closed in order to replace the rolled recording paper 21.
When the guide pin 18 is rotated open, the notch flat portion 199 escapes from the lower edge 198 due to the rotation of the fulcrum shaft 28 and the circumferential portion pushes up the slide lever 191 via the lower edge 198.
Bracket 185 which acts as a separation part by 8
The thermal head 22 is also pushed up and rotated against the spring 190 via the spring 190, and is maintained in a state separated from the platen roller 23. Therefore, when setting the paper between the thermal head 22 at the leading end of the rolled recording paper 21 and the platen roller 23, there is no particularly large frictional resistance and there is no problem in the setting operation. Then, when the front cover unit 27 is closed, the pressurized contact state is established again.

Next, FIG. 16 shows how the rolled recording paper 21 is held. This roll-shaped recording paper 21 is wound within the recording surface, and is held by a recording paper holder 200 having an arcuate cross section. A string is provided on the inner peripheral surface of the recording paper holder 200 to reduce friction on the outer periphery of the rolled recording paper 21. Further, the recording paper holder 200 is rotatably supported around a fulcrum pin 202 which is fixed to the bracket 201 by caulking. Here, this bracket 201 constitutes the front cover unit 27 together with the front cover 26 and the recording paper holder 200, and the mounting part 203 for the front cover 26
is formed, and the fulcrum shaft 28 is inserted into the bracket 201 via a bush 204 which is caulked, so that the fulcrum shaft 28 is rotatable integrally with the fulcrum shaft 28. Further, in order to restrict the opening and closing of the front cover unit 27, a slide lever 206 has an elongated hole 205 into which the other end of the fulcrum pin 202 is inserted.
A pin 207 is fixed to the other end of the slide lever 206 by caulking. A long hole 208 into which the pin 207 is inserted is formed in the side plate 170. 209 and 210 are spacers. Therefore, the rolled recording paper 2
When the front cover unit 27 is opened and rotated for replacement, the pin 207 comes to the left end of the elongated hole 208 of the side plate 170, and the fulcrum pin 202 also moves to the slide lever 20.
Since it comes to the left end of the elongated hole 205 of No. 6, it becomes a stopper and the front cover unit 27 cannot be opened any further. In this way, the roll of recording paper 21 can be dropped onto the recording paper holder 200 with the front cover unit 27 kept open, and there is no need to worry about the trouble of holding the shaft center. At this time, since the platen roller 23 and the like are not included in the front cover unit 27, operability is good, and the recording paper holder 20
0 itself is also rotatable around the fulcrum pin 202, so the opening angle of the front cover unit 27 can be made small (see FIG. 13). Further, at this time, as described above, the thermal head 22 and the platen roller 23 are in a separated state. Then, when the front cover unit 27 is closed, the fulcrum pin 202 and the pin 207 move to the right ends of the elongated holes 205 and 206 and become stoppers. In order to prevent the recording paper holder 200 from rotating with the front cover unit 27 closed, a light brake is applied by a rubber cushion (not shown). Furthermore, slide levers 206 are provided on both the left and right sides in consideration of force balance.

Further, the side plate 170 is attached to stays 212 and 213 fixed to the main body frame 211 of the apparatus main body 1, and a guide plate 168 is attached to the side plate 170 with screws 214 as shown in FIG.
The guide plate 169
and the sawtooth plate 25 are connected to the screw 2 through the spacer 125.
16. Here, guide plate 1
A guide film 218 is adhered to the slope 217 of 69. This guide film 218 has elasticity and is used to facilitate setting of the leading end of the rolled recording paper 21, and as shown in FIG. 18, its lower end is an entrance to the platen roller 23/tension roller 167 side. It is extended to serve as a guide. Further, the upper end side of the guide film 218 extends between the guide plate 169 and the sawtooth plate 25 from the opposite direction so as not to set the leading end of the rolled recording paper 21. However, if the clearance α between the upper end of the guide film 218 and the sawtooth plate 25 disappears,
Since the problem of frictional electrification arises, this clearance α is set to be greater than the paper thickness. In this case, if a paper setting manual is printed on the guide film 218, it will be easier to understand during the setting operation.
Therefore, to replace the rolled recording paper 21, open the front cover unit 27, drop the rolled recording paper 21 onto the recording paper holder 200, and use the guide film 218 as a guide to guide the tip of the rolled recording paper 21 to the platen roller 23 and the template. Insert between the shock rollers 167,
By turning the knob 174 on the platen roller 23, it is necessary to feed the paper through the space between the thermal head 22 and the platen roller 23, which are in a separated state, to the sawtooth plate 25. Note that the guide plate 168 is provided with a reflective paper end sensor, and is set to detect the presence or absence of recording paper.

Next, a holding mechanism for the tension roller 167 is shown in FIG. This tension roller 167 has the functions of a tension roller when setting paper and a jam detection roller during normal recording, and its shaft extends through the elongated hole 219 of the side plate 170, and has a screw 220 and a bushing. It is supported by a bearing 223 to a lever 222 rotatably attached to the side plate 170 by a lever 221 . This lever 222 is biased upward by a spring 225 locked between the tip and a screw 224 screwed to the side plate 170, and the tension roller 167 is set to apply tension to the platen roller 23 side. . However, since there are problems such as skew and sagging of the recording paper, the contact pressure of the tension roller 23 is set to be sufficiently small compared to the contact force between the platen roller 23 and the thermal head 22. A slit plate 226 is attached to the shaft end of the tension roller 167, and the bracket 22
PC board 22 attached to side plate 170 via 7
The jam is set to be detected by the photo sensor 229 on the camera 8.

By the way, FIG. 20 shows the frame structure of the entire device, in which the aforementioned stays 165 and 212 are installed between the main body frame 211, and stays 230 and 231 for the power supply unit 29 are installed on the rear side. installed. and,
The system control unit 30 is attached to the bottom of the stay 165 via a spacer 232 with a screw 2.
33.

As described above, the present invention includes a platen roller connected to and driven by a motor and rotatably held on a side plate, a manual rotation knob coupled to the platen roller, and a platen roller for applying driving force to recording paper. A tension roller that presses the recording paper against the platen roller, a thermal head that is held by a bracket that is rotatably attached to the side plate and comes into contact with the platen roller, and an apparatus main body that is sized so that the recording paper can be replaced. an opening formed in the main body of the apparatus, a lid part which is provided in the main body of the apparatus so as to be openable and closeable and which closes the opening part, and a bracket which moves in conjunction with the rotation of the lid part and which holds the thermal head. The thermal head, the platen roller, and the tension roller are held within the apparatus main body, and the bracket is interlocked and driven via the slide lever when the lid is opened. Since the thermal head and the platen roller are separated from each other, when replacing the storage paper, the bracket that is linked to the slide lever separates the thermal head and the platen roller, making it easy to insert and pull out the recording paper. Yes, there is no risk of damaging the thermal head, and since the thermal head and platen roller can be separated from each other by opening the lid, the slide lever acts on the bracket, so special operations are not required. Furthermore, when setting the recording paper, the platen roller is driven in conjunction with the rotation of the knob, which eliminates the need to manually turn the conveying part including the platen roller, which prevents the conveying part from getting dirty. In addition, the platen roller can be easily driven and even an inexperienced operator can set it at the correct recording position, which has the effect of greatly improving work efficiency when replacing recording paper.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is an external perspective view, FIG. 2 is a schematic vertical side view, FIG. 3 is a perspective view of the document conveyance path, and FIGS. 4 to 7. 8 is an exploded perspective view of each part of the document conveyance system, FIG. 8 is an explanatory diagram of the optical system, FIGS. 9 to 12 are exploded perspective views of each part of the optical imaging system, and FIG. 13 is a schematic side view of the receiving and recording system. 14 to 17 are exploded perspective views of each part, FIG. 18 is a side view, FIG. 19 is an exploded perspective view, and FIG. 20 is an exploded perspective view showing the frame structure. DESCRIPTION OF SYMBOLS 1... Apparatus body, 21... Recording paper, 22... Thermal head, 23... Platen roller, 26...
...Lid part, 167...Tension roller, 170...
...Side plate, 174...Knob, 178...Motor, 1
85...Bracket, 191...Slide lever.

Claims (1)

[Claims] 1. A platen roller connected to and driven by a motor and rotatably held on a side plate; a manual rotation knob coupled to the platen roller; A tension roller that presses the recording paper against the platen roller, a thermal head that is held by a bracket rotatably attached to the side plate and comes into contact with the platen roller, and an apparatus body sized so that the recording paper can be replaced. an opening formed in the main body of the apparatus, a lid part that is openable and closable in the main body of the apparatus and that closes the opening part, and a bracket that moves in conjunction with the rotation of the lid part and is connected to a bracket that holds the thermal head. The thermal head, the platen roller, and the tension roller are held within the apparatus main body, and the bracket is interlocked and driven via the slide lever when the lid is opened. . A recording apparatus, characterized in that the recording paper is fed to a printing position by separating the thermal head and the platen roller, gripping the knob and rotating the platen roller.