JPH0514623B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a thermal transfer recording machine using a roll-shaped thermal ink sheet, a thermal recording machine using a roll-shaped thermal paper, and a recording machine using a roll-shaped recording paper. The present invention relates to a support device for supporting roll paper such as the roll-shaped thermal ink sheet, thermal paper, recording paper, etc. in various recording machines such as printers.

(Prior art) In each of the above-mentioned recording machines, in order to facilitate roll paper replacement and jam removal, the recording machine body is divided into an upper frame and a lower frame, and the rear ends of both frames are connected by a pivot. A clamshell type recorder is known, which is constructed so that it can be opened and closed freely. Further, in such a recording machine, the roll paper is usually set at the end of the lower frame on the pivot side, and a winding device is arranged on the opening side of the roll paper. in this case,
Since the take-up device is on the opening side, the tip of the roll paper can be easily connected to the take-up device, but since the bearing of the roll paper is on the pivot side of the lower frame, it is difficult to set the roll paper on the bearing. However, there was a problem in that it was necessary to hold the roll paper and insert one's hand into the back of the shaft side to set it, making the work of installing and replacing the roll paper very complicated.

(Purpose of the Invention) The present invention has been made to solve such problems, and it is possible to easily set the roll paper in the inner part of the pivot side of the upper frame and the lower frame, and it is easy to replace the roll paper. The present invention provides a roll paper support device for a recording machine that can improve workability.

(Structure of the Invention) The first invention is a clamshell type recorder in which the recorder main body is divided into an upper frame and a lower frame, and the rear ends of both frames are connected by a pivot so that they can be opened and closed. The holder includes a roll paper holder and a pair of guide members, the holder is composed of a holder shaft and a pair of disk-shaped protection plates having a diameter larger than the winding diameter of the roll paper, and the holder shaft is The roll paper is held in the holder by being inserted into the shaft hole of the roll paper, and a pair of protection plates are provided at both ends of the holder shaft to sandwich the roll paper from both sides. Provided parallel to each other on both left and right sides between the pivot and the recording section,
Each guide member has a lower front half and a higher rear half, and the upper surface of the front half of each guide member is provided with a guide section for rolling the protection plate in the front and rear direction, and the upper surface of the rear half is provided with a guide section for rolling the protection plates on the outside of both the protection plates. A holder shaft rolling guide part is provided in the front-rear direction with respect to the protruding parts at both ends of the protruding holder shaft, and the protruding parts at both ends of the holder shaft are removably engaged with the rear ends of the holder shaft rolling guide parts, so that the holder is rotated. It is characterized by being provided with a notch-shaped bearing portion that rotatably supports the.

The second invention is a clamshell type recording machine in which the recording machine main body is divided into an upper frame and a lower frame, and the rear ends of both frames are connected by a pivot so that they can be opened and closed. The holder includes a holder, a pair of guide members, a holder shaft, a pair of disc-shaped protection plates, and a spring receiving member that is locked near the end of the holder shaft on the outside of one of the protection plates. and a spring provided between the spring receiving member and one protection plate to bias one protection plate toward the other protection plate, and a positioning boss portion on the outer surface of the center of the other protection plate. is provided, the holder shaft is inserted into the shaft hole of the roll paper, a pair of protection plates are provided at both ends of the holder shaft, and the roll paper is held in the holder by sandwiching the roll paper from both sides, and the pair of guides The members are provided parallel to each other on both left and right sides between the pivot shaft and the recording section within the lower frame, and each guide member abuts the outer surface of the spring receiving member and the outer surface of the positioning boss portion of the second protection plate. a positioning guide surface that positions the protective plates in the axial direction by contacting them and tilting so as to reduce the distance between the outer surfaces against the spring;
A holder shaft rolling guide portion formed downwardly downward to rollably guide both the protective plates and the protruding portions at both ends of the holder shaft protruding to the outside of the spring receiving member is provided. The device is characterized in that a notch-shaped bearing portion is provided that detachably engages the protruding portions at both ends of the holder shaft and rotatably supports the holder.

(Function) According to the first invention, the roll paper is held in the holder, the upper frame is opened, and both protection plates of the holder are moved from the opening side of the recording machine to the protection plate roller provided in the front half of the guide member. By placing it on the moving guide part and rolling it toward the back axis side, the holder shaft is engaged with the bearing part through the holder shaft rolling guide part in the rear half of the guide member, and as a result, the roll paper moves the holder. It is rotatably supported by a bearing part on the pivot side at the back inside the recording machine. Therefore, when setting the roll paper, there is no need to reach into the back of the machine, and the holder can be easily set by simply rolling the holder from the front of the recording machine. Moreover, the recording machine is clamshell-shaped and has a large opening on the front side, and by lowering the front half of the guide member, both sides of the front side are also large openings, so it is easy to carry roll paper into the recording machine. It also makes it easier to carry out the work, greatly improving the efficiency of tasks such as replacing roll paper.

According to the second invention, since the holder shaft rolling guide portion on the guide member side is formed downwardly toward the rear,
When the protruding parts at both ends of the holder shaft roll on this guide part, the holder, etc. rolls backward under its own weight without pushing the holder, and the end of the holder, that is, the rear end of the guide part, rolls backwards by its own weight. The protrusions at both ends of the holder shaft are automatically engaged with and supported by the provided bearings. Moreover, during the rolling process of this holder, the spring and spring receiving member provided on the holder side,
By the holder positioning guide surface provided on the guide member side, both protective plates of the holder and the roll paper are moved to one side against the spring, and the holder is automatically positioned in the axial direction. The holder or roll paper is set accurately in the predetermined position.
Furthermore, due to the rolling motion of the holder due to its own weight and the guiding action of the positioning guide surface, a force is exerted to compress the spring and position the holder, so there is no need to manually move the holder to one side, and the holder can be easily set. The workability of the system is greatly improved. Further, the outer surfaces of the spring receiving member and the other protective plate are pressed against the inner surface of the rear half of the guide member by the spring, and an appropriate back tension is applied to the rotation of the holder, so that when the roll paper is taken out, This prevents loosening.

(Example) The drawings show an example in which the roll paper support device of the present invention is used in a thermal transfer recording machine. First, an outline of a thermal transfer recording machine will be explained with reference to FIGS. 1 to 3. In this thermal transfer type recording machine, a recording machine main body 1 is divided into an upper frame 1a and a lower frame 1b, and the rear ends of both frames 1a and 1b are connected by a pivot 2 so as to be openable and closable, forming a clam shell shape. . 3 is a button for unlocking both frames, 4 is an operation panel, 5 is a paper feed cassette, and 6 is a tray. On the lower frame 1b, a thermal ink sheet A coated with thermal sublimation or thermal melting solid ink as a rolled paper is set on the axis 2 side via a holder 7, and a winding device 9 is provided on the opening side. A thermal head 8 for applying heat pulses is provided in the middle.

On the other hand, the upper frame 1a is provided with idle rollers 10, 11, 12 that guide the thermal ink sheet A led out from the holder 7 to the thermal head 8, and a platen roller 13 facing the thermal head 8. Above are a paper cassette receiver 14, a tray 6, a paper feed roller 15 that takes out the recording paper (plain paper) B from the paper cassette 5 set in the paper cassette receiver 14, and a tray 6 that guides the recording paper B to the platen. A pair of upper and lower registration rollers 16 and 17 that feed the roller 13 and a pair of upper and lower discharge rollers 18 and 19 that guide the recording paper B after thermal transfer to the tray are provided. Note that 20 is a separation roller for separating the thermal ink sheet A and the recording paper B after thermal transfer, and this separation roller 20 is attached to the upper frame 1a.
However, in the illustrated example, it is provided on the lower frame 1b, as will be described later. 21... are paper feed guide plates, and 22, 22 are discharge guide plates.

In the thermal transfer type recording machine, the thermal ink sheet A is in a roll shape, and is supported by the end of the lower frame 1b on the axis 2 side via the holder 7, and is drawn out from the holder 7 by the operation of the winding device 9, and is drawn out from the holder 7 by the idler roller. 10, 11, 12, between the platen roller 13 and the thermal head 8, and the separation roller 20.
The film is then wound up by a winding device 9. On the other hand, recording paper B
is housed in the paper feed cassette 5 and inserted into the paper feed cassette receiving portion 14, and the spring 24 and push-up plate 25
The sheets are pressed against the paper feed roller 15 side by the paper feed roller 15, and are taken out one by one from the paper feed cassette 5 by the paper feed roller 15, and are fed between the platen roller 13 and the thermal head 8 by the registration rollers 16 and 17, where they are , the thermal ink sheet A and the recording paper B are overlapped, and a heat pulse according to the information is applied to the thermal head 8, and the ink on the thermal ink sheet A is sublimated or melted to form the recording paper B.
After that, the recording paper B is separated from the thermal ink sheet A by a separation roller 20,
The paper is discharged onto the tray 6 by discharge rollers 18 and 19.

By the way, in this thermal transfer type recording machine, as shown in FIG. 3, the upper frame 1a is opened and closed by rotating around the pivot 2 with the supply path of the thermal ink sheet A as a boundary, and the thermal ink sheet A is replaced. etc. will be carried out. In this case, in the conventional method where a bearing member is simply provided near the pivot shaft 2 of the lower frame 1b and the heat-sensitive ink sheet A is directly supported by that member, the openings of the upper and lower frames 1a and 1b near the bearing member cannot be used. Since the amount is small, the work of supporting and replacing the thermal ink sheet A becomes complicated. Therefore, in the present invention, in order to facilitate replacement of the heat-sensitive ink sheet A, the following configuration is adopted.

That is, the holder 7 for the thermal ink sheet A is configured separately from the lower frame 1b. Holder 7
As shown in FIG. 4, it consists of a holder shaft 26 and a pair of left and right disk-shaped protection plates 27 and 28. One of the protection plates 27 has a boss portion 27a on the inner surface of the center.
is integrally protruded, a cylindrical spring bearing member 29 is arranged on the outside thereof, and a spring 30 is provided between the spring bearing member 29 and the protection plate 27,
They are fitted onto one end side of the holder shaft 26, and the spring receiving member 29 is attached to the holder shaft 26 with a stop ring or the like.
By being locked to the spring 30, the protection plate 27
is biased toward the other end. In addition, the other protection plate 28 has boss portions 28 on both the inner and outer sides of the center.
a and 28b are integrally provided in a protruding manner. This protection plate 28 is fitted to the other end of the holder shaft 26 so as to be slidable in the axial direction. The thermal ink sheet A is wrapped around a paper tube 31, and before setting the thermal ink sheet A inside the recording machine, the holder shaft 26 is inserted into the shaft hole 32 formed in the paper tube 31 outside the machine. , paper tube 3
After fitting one end of 1 to the boss portion 27a of the protection plate 27, fitting the protection plate 28 to the other end side of the shaft 26,
The boss portion 28a is fitted to the other end of the paper tube 31,
The heat-sensitive ink sheet A is sandwiched between both protection plates 27 and 28 and held rotatably around a shaft 26. In this way, the heat-sensitive ink sheet A is held in the holder 7.

On the other hand, on the left and right side plates of the lower frame 1b,
A pair of left and right guide members 33, 33 are provided between the pivot shaft 2 and the thermal head 8 so as to face each other. As shown in FIG. 5, both guide members 33, 33 are symmetrical with respect to each other, with a lower front half and a higher rear half. A protective plate rolling guide portion 34 in the front and back direction is provided on the inner upper surface of the front half.
34 are provided. The guide portions 34, 34 are normally formed in the shape of a groove that slopes downward toward the rear. Projections 35, 35 for preventing derailment of the protection plates 27, 28 are provided on the outside of the protective plate rolling guide parts (grooves) 34, 34, and behind the protrusions 35, 35, a guide wall of the rear half is provided. 36, 36 are provided protrudingly. guide wall 3
Guide surfaces 37, 37 for positioning the holder 7 in the axial direction are formed at the front upper ends of the inner surfaces of the holders 6, 36, and guide surfaces 37, 37 for axial positioning of the holder 7 are formed at the upper ends of the guide walls 36, 36, and guides for rolling the holder shaft are provided at the upper ends of the guide walls 36, 36, which are higher in the front and lower in the rear. Part 38,
38 is provided, and notched bearing portions 39, 39 are provided at the rear ends of the guide portions 38, 38.

When setting the thermal ink sheet A in the recording machine, the thermal ink sheet A is held in the holder 7 outside the machine in advance by the method described above (see Fig. 4), and the upper frame 1a is opened. Then, as shown in FIG.
The protective plate rolling guide portions (grooves) 34, 34 are engaged from the opening sides of a, 1b. At this time, the recorder is in a clamshell type with large openings at the leading ends of both frames 1a and 1b, and the guide member 3
By lowering the front half of 3 and 33, the left and right sides of both frames 1a and 1b are also wide open, making it easy to carry the holder 7 into and out of the space between the frames 1a and 1b, and to remove the protective plates 27 and 28. Engagement with the protection plate rolling guide parts 34, 34 can be performed very easily.

Next, when the holder 7 is rolled backward, the protection plates 27 and 28 roll on the protection plate rolling guide parts 34 and 34 in the front half of the guide members 33 and 33,
At the rear parts of the guide members 33, 33, both the protection plates 27, 28 are removed from the guide parts 34, 34, and at the same time, both ends of the holder shaft 26 are rotated at the upper ends of the guide walls 36, 36. It rides on the moving guide parts 38, 38 and rolls backward. At this time, since the holder shaft rolling guide portions 38, 38 are formed downwardly toward the rear, the holder 7 rolls backward under its own weight without having to be pushed in by hand. Then, at the end of the rolling, the holder shaft 26 automatically engages with the bearings 39, 39. As a result, the thermal ink sheet A is rotatably supported via the holder 7 in the inner part of the lower frame 1b on the pivot 2 side. Also,
During the rolling process of the holder 7, the tip surface of the spring receiving member 29 and the outer boss portion 28b of the protection plate 28
abutting the inner surfaces of the guide walls 36, 36 via the positioning guide surfaces 37, 37, respectively,
Further, both the protection plates 27, 28 and the heat-sensitive ink sheet A are moved to one side by the spring 30, and are automatically positioned in the axial direction. In this case as well, the spring is compressed by the rolling motion of the holder 7 etc. due to its own weight and the guiding action of the positioning guide surfaces 37, 37, and the above positioning is performed, so that both ends of the holder shaft 26 are connected to the bearing part. 39, 39, there is no need to insert your hand into the vicinity of the bearing at the back and reposition it.

In this way, by holding the thermal ink sheet A in advance in the holder 7 outside the machine, and simply rolling the holder 7 along the guide members 33, 33 from the opening sides of both frames, the shaft 26 of the holder 7 can be inserted into the bearing part at the back. 39,3
The holder 7 can be rotatably held by automatically engaging the holder 9, and the heat-sensitive ink sheet A can be easily set in a predetermined position.

The heat-sensitive ink sheet A is taken out from the holder 7 by a winding device 9 and placed on idle rollers 10, 1.
1 and 12, and is supplied between the thermal head 8 and the platen roller 13. At this time, with the front end surface of the spring receiving member 29 of the holder 7 and the front end surface of the outer boss portion 28b of the protection plate 28 pressed against the inner surfaces of the guide walls 36, 36 by the spring 30, the holder 7 and the thermal ink sheet A By rotating together, an appropriate back tension is imparted to the thermal ink sheet A.

In addition, as a means for increasing this back tension, it is possible to create a tension between the outer surfaces of the protective plates 27 and 28 of the holder 7 and the inner surfaces of the protrusions 35 and 35, or between the shaft 26 and the bearing parts 39 and 39. Although a frictional resistance member etc. may be provided, in the illustrated example, FIGS.
As shown in the figure, a leaf spring-shaped resistance member 41 is provided via a bracket 40 on the inner surface of the upper wall of the upper frame 1a at a position opposite to the protection plates 27 and 28 of the holder 7, and is used to close the upper frame 1a. At times, the resistance member 41 is elastically pressed against the outer peripheral surfaces of the protection plates 27 and 28 of the holder 7 in the set position, and when the upper frame 1a is opened, the resistance member 41 is pressed against the outer peripheral surfaces of the protection plates 27 and 28 of the holder 7 in the set position. I'm starting to move away from it.

By doing this, when the upper frame 1a is closed,
Due to the elastic pressure contact between the resistance member 41 and the protection plates 27 and 28, the holder 7 is properly held in a predetermined position, and an appropriate rotational resistance is imparted to the holder 7, so that back tension is applied to the thermal ink sheet A. is applied, without wrinkles etc. occurring on the sheet A,
Sheet A is always properly derived. Further, when the upper frame 1a is opened, the resistance member 41 is moved to the holder 7.
The holder 7 is separated from the protective plates 27 and 28, and the holder 7 becomes free, and the open state of the upper frame 1a is maintained by the damper 42 provided between the upper frame 1a and the lower frame 1b. Therefore, in this state, the holder 7 can be easily removed from the machine by lifting the holder 7, detaching the holder shaft 26 from the bearing parts 39, 39, and rolling the holder 7 toward the front along the guide members 33, 33. It can be taken out.

When the thermal ink sheet A is consumed in this way, open the upper frame 1a and take out the holder 7 outside the machine, then remove the paper tube 31 from the holder 7 outside the machine, and add new thermal ink to the holder 7. The heat-sensitive ink sheet A can be easily replaced by holding the sheet A and setting it in the same manner as described above. Note that the paper tube 31 removed from the holder 7 is set in the winding device 9 and reused. As shown in FIGS. 7 and 8, the winding device 9 includes a pair of left and right holding plates 43 and 44 facing each other, one holding plate 43 having a shaft 45 and a bracket 46.
The winding motor 49 is rotatably supported by the lower frame 1b via the transmission gears 47 and 48.
The other holding plate 44 is connected to the lower frame 1b.
It is rotatably supported inwardly via a shaft 50, a bracket 51, and a spring 52. Then, the paper tube 3 removed from the holder 7
1, with the leading end of the thermal ink sheet A set in the machine fixed, the paper tube 31 is attached to a boss portion 43a protruding from the inner surfaces of both the holding plates 43, 44.
44a and held therein, and in this state, the winding motor 49 is driven to rotate the paper tube 31 to wind up the thermal ink sheet A.

On the other hand, each roller is driven by a drive system shown in FIGS. 7 and 8. In addition, FIG. 8 shows a state in which each roller is developed in a plane along the conveyance path. In the figure, the shaft 15a of the paper feed roller 15
A gear 53 fixed to one end meshes with a gear 54, and the gear 54 is connected to a paper feed motor 56 via a reducer 55. Paper feed roller 1
5 is rotationally driven in a predetermined direction.

A timing belt 61 is stretched between a timing gear 59 connected to a reducer 58 of the main motor 57 and a timing gear 60, and the gear 60 is integrated with a transmission gear 62 and a timing gear 63.
The transmission gear 62 is rotatably supported by one end of a fixed shaft 64, meshes with a transmission gear 65 fixed to one end of the shaft 17a of the lower registration roller 17, and is connected to a timing gear 63 and one end of the shaft of the platen roller 13. A timing belt 67 is stretched around the fixed timing gear 66. Then, the main motor 57 drives the platen roller 13 and the lower registration roller 17 to rotate in a predetermined direction. Further, an idle roller 12 is rotatably provided at the intermediate portion of the fixed shaft 64, and a transmission gear 68 and a timing gear 69 are rotatably supported integrally at the other end of the shaft 64. A gear 68 meshes with a transmission gear 70 fixed to the other end of the shaft 17a of the lower registration roller 17, and a timing gear 69 and a timing gear 71 fixed to the other end of the shaft 19a of the lower discharge roller 19. A timing belt 72 is stretched, and the lower discharge roller 19 is rotated in a predetermined direction in conjunction with the rotation of the lower registration roller 17.

By the way, among the above-mentioned rollers (see FIG. 2), idle rollers 10, 11, 12, paper feed roller 15, lower registration roller 17, and lower discharge roller 1
9 are rotatably supported by shafts at predetermined positions of the upper frame 1a, but the platen roller 1
3. The upper registration roller 16, separation roller 20, and upper discharge roller 18 are each supported as follows.

That is, as shown in FIGS. 9 to 11, swing arms 73 are swingably supported at both ends of the fixed shaft 64, and both ends of the shaft 13a of the platen roller 13 are provided on the left and right side plates of the upper frame 1a. The upper end of the arm 73 and the upper frame 1a are rotatably supported via a bearing 74 at the middle part of the arm 73 through a notch or an elongated hole (both not shown).
A spring 77 is tensioned via a spring force adjuster 76 between the spring 75 and the bracket 75 provided on the spring 7.
7 urges the arm 73 in the right direction in FIG. On the other hand, the upper registration roller 16 has its shaft 16
Both ends of a are rotatably and vertically movably supported in elongated bearing holes 78 provided in the side plates of the upper frame 1a, and are pressed against the lower registration rollers 17 by springs 79. The swing arm 73 is provided with a push-up protrusion 73a extending below the shaft 16a of the upper registration roller 16.

When the upper and lower frames 1a and 1b are closed, the swinging arm 73 is urged counterclockwise by the spring 77, the platen roller 13 is pressed against the thermal head 8, and this pressing causes the above-mentioned push-up. The protruding piece 73a is separated from the upper registration roller shaft 16a, the shaft 16a is urged downward by the spring 79, the upper registration roller 16 is pressed against the lower registration roller 17, and both registration rollers 16 and 17 move the paper feed roller 15. The recording paper B supplied from the recording paper B is supplied between the thermal head 8 and the platen roller 13 with the timing adjusted, and the thermal ink sheet A and the recording paper B are overlapped between them, and the thermal head 8 thermally transfers the recording onto the recording paper B. be done.

Next, when the upper frame 1a is opened, the platen roller 13 is moved to the thermal head 8 as shown in FIG.
The swinging arm 73 is pulled by the spring 77 and rotates counterclockwise, and this rotation pushes up the roller shaft 16a, and the upper registration roller 16 is automatically separated from the lower registration roller 17. Ru. Note that when the roller shaft 16a is pushed up by a predetermined amount, the shaft 16a hits the upper wall of the bearing hole 78, and the roller shaft 16a is pushed up and the swing arm 73
oscillation is stopped. As a result, when a jam occurs, when the upper frame 1a is opened, the swing arm 73 swings and both registration rollers 16, 17 are automatically released to form a large gap, making it easier to remove the jam. can be resolved.

The separation roller 20 is provided on the lower frame 1b, and as shown in FIG.
A pair of brackets 80 facing each other are provided on the left and right side plates of the lower frame 1b in a position that does not interfere with the lower frame 1b. A bearing hole 81 (which may be a hole) is provided, and this bearing hole 8
A shaft 20a of a separation roller 20 is rotatably supported at 1 so as to be movable back and forth, and is biased rearward by a spring 82.

When the upper frame 1a is closed, the platen roller 13 is pressed against the spring 7 as shown in FIG.
The separation roller 20 is held in pressure contact with the thermal head 8 by a spring 82, and the separation roller 20 is held in pressure contact with the outer peripheral surface of the platen roller 13, which is U-turned upward and rearward from the pressure contact portion. In this state, during recording, the holder 7 is held at the pressure contact portion between the thermal head 8 and the platen roller 13.
The thermal ink sheet A supplied from the idle rollers 10, 11, 12 and the recording paper B supplied from the registration rollers 16, 17 are stacked,
After transfer recording is performed on the recording paper B, the thermal ink sheet A is wound up by the winding device 9 while being curved in an S shape along the outer peripheral surfaces of the platen roller 13 and the separation roller 20. On the other hand, the recording paper B is discharged onto the tray 6 via discharge rollers 18 and 19 while being curved in a C shape along the outer peripheral surface of the platen roller 13 .

In this way, the thermal ink sheet A after recording is wound up while being curved in an S shape, and the recording paper B is discharged while being curved in a C shape, thereby separating the thermal ink sheet A and the recording paper B between the platen roller 13 and the separation roller 20. It can be forcibly and smoothly peeled off on the discharge side.

Note that when opening the upper frame 1a from the state shown in FIG.
3 and 20 are biased in opposite directions by springs 77 and 82, respectively, so as the upper frame 1a opens, both rollers 13 and 20 move backward from each other against their respective springs 77 and 82. , the platen roller 13 passes over the separation roller 20 and is separated upward (see FIG. 11). Also,
When the upper frame 1a is closed from the state shown in Fig. 11,
After the platen roller 13 hits the separation roller 20, both rollers 13, 20 are moved by their respective springs 77,
82, the platen roller 13 climbs over the separation roller 20 and comes into pressure contact with the thermal head 8, and the separation roller 20
is held in pressure contact with the outer peripheral surface of the platen roller 13 at a predetermined position. In this way, the platen roller 13 and separation roller 20 are connected by springs 77 and 8, respectively.
2, the upper frame 1a can be opened and closed without any trouble.

In this case, in the illustrated example, the platen roller 13 is supported by the swing arm 73 in order to release the upper registration roller 16 from the lower registration roller 17 when the upper frame 1a is opened.
3 and the upper registration roller 16 to the upper frame 1a.
Even if the separation roller 20 is supported at a predetermined position, by biasing the separation roller 20 with the spring 82 as described above and making it movable with respect to the lower frame 1b,
The upper frame 1a can be opened and closed without any trouble.

FIG. 12 shows the locking mechanism of the upper frame 1a. In the figure, a shaft 84 is rotatably provided between the left and right side plates of the upper frame 1a, and a shaft 84 is provided at both ends of the shaft 84 of the lower frame 1b. A hook 8 that can be freely engaged and detached from a locking portion 83 provided on both left and right side plates.
5 is fixed, a swinging plate 86 is fixed to one end of the shaft 84, and a pin 87 protruding from the upper end of the swinging plate 86 is provided in the notch 8 in the operating member 88.
9 is engaged. The operating member 88 is supported slidably in the front and back direction by a bracket 90 provided on the upper frame 1a, and the lock release button 3 protruding from the upper end thereof is inserted into a window hole (not shown) provided on the upper wall of the upper frame 1a. A spring 91 is provided between the bracket 90 and the rocking plate 86 to bias the hook 85 in the direction of engagement with the locking portion 83. And upper frame 1a
When the hook 85 is closed, the hook 85 engages with the locking portion 83 of the lower frame 1b, and the engaged state, that is, the locked state is maintained by the spring 91. By pressing the button 3 and sliding the operating member 83, the pin is released. 87, swing plate 86, hook 85 via shaft 84
is swung, disengaged from the locking portion 83, and the lock is released.

In the above embodiment, the roll paper support device of the present invention is used in a thermal transfer type recording machine that overlaps a thermal ink sheet A and a recording paper and transfers the ink from the thermal ink sheet A to the recording paper B using the thermal head 8. However, the roll paper support device of the present invention can be used in various recording machines such as a thermal recording machine that records by directly applying a heat pulse to thermal paper and a recording machine that uses ordinary rolled recording paper. .

(Effects of the Invention) As explained above, according to the first invention, after a roll paper such as a thermal ink sheet is held in a holder outside the machine, the roll paper is held in a holder with the upper frame open. The roll paper can be easily set in the back of the lower frame on the pivot side by simply rolling it from the front side of the opening of the upper and lower frames through the opening. In particular, because the recorder is clamshell-shaped and the front half of the guide member is lowered, the front ends of the upper and lower frames and both left and right sides thereof have large openings, making it easy to carry roll paper into the machine. It can be carried out, and there is no need to reach into the interior of the machine, greatly improving work efficiency such as replacing and setting roll paper.

According to the second invention, since the holder shaft rolling guide portion on the guide member side is formed downwardly toward the rear,
When the protruding parts at both ends of the holder shaft roll on this guide part, the holder etc. can be rolled backward by its own weight without having to push the holder. The protrusions at both ends of the holder shaft can be automatically engaged and supported by the bearings provided at the rear end of the holder shaft rolling guide. Furthermore, during the rolling process of the holder, the spring and spring receiving member provided on the holder side, and the guide surface for positioning the holder provided on the guide member side, cause both the protection plates of the holder and the roll paper to be spring-loaded. Push it to one side against the
The holder can be automatically positioned in the axial direction, and the holder, that is, the roll paper, can be accurately set at a predetermined position. Furthermore, due to the rolling motion of the holder, etc. due to its own weight, and the guiding action of the positioning guide surface, the force for compressing the spring and positioning the holder can be exerted, so there is no need to manually move the holder to one side, and the holder can be easily set. can greatly improve workability. In addition, the spring allows the outer surfaces of the spring receiving member and the other protective plate to come into pressure contact with the inner surface of the rear half of the guide member, so that an appropriate back tension can be applied to the rotation of the holder, and when the roll paper is taken out, This can prevent loosening.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of a thermal transfer type recording machine, Fig. 2 is a longitudinal cross-sectional side view showing an embodiment in which the roll paper support device of the present invention is used in a thermal transfer type recording machine, and Fig. 3 shows an upper frame thereof. A longitudinal side view showing the open state;
Fig. 4 is a longitudinal sectional view of the holder, Fig. 5 is a perspective view showing the relationship between the holder and the guide member, Fig. 6 is an explanatory diagram showing the direction in which the roll paper is set, and Fig. 7 is each of the thermal transfer recording machines. FIG. 8 is a perspective view showing the drive system of the rollers and take-up device, FIG. 8 is a plan view of the arrangement of each roller developed along the conveyance path, and FIG. 9 is a schematic diagram showing the relationship between the platen roller, registration roller, and separation roller. Fig. 10 is a side view of the main part when the upper frame is closed, Fig. 11 is a side view of the main part when the upper frame is opened, and Fig. 12 is a side view of the locking mechanism of the frame. It is. 1... Recorder main body, 1a... Upper frame, 1b
... lower frame, 2 ... pivot, 3 ... lock release button, 4 ... operation panel, 5 ... paper feed cassette, 6 ...
... Tray, 7 ... Holder, 8 ... Thermal head, 9 ... Winding device, 10, 11, 12 ... Idle roller, 13 ... Platen roller, 15 ...
Paper feed roller, 16, 17... Registration roller, 1
8, 19...Discharge roller, 20...Separation roller,
26... Holder shaft, 27, 28... Protective plate, 27
a, 28a, 28b...Boss portion, 29...Spring receiving member, 30...Spring, 31...Paper tube, 32...
Shaft hole, 33...Guide member, 34...Protective plate rolling guide portion (groove), 35...Protrusion, 36...Guide wall, 37...Positioning guide surface, 38...Holder shaft rolling guide Part, 39...Bearing part.

Claims (1)

[Scope of Claims] 1. A clamshell type recording machine in which the recording machine main body is divided into an upper frame and a lower frame, and the rear ends of both frames are connected by a pivot so that they can be opened and closed freely. The holder includes a holder shaft and a pair of disk-shaped protection plates with a diameter larger than the winding diameter of the roll paper, and the holder shaft is connected to the roll paper shaft. The roll paper is held in the holder by being inserted into the hole and a pair of protection plates are provided at both ends of the holder shaft to sandwich the roll paper from both sides, and the pair of guide members are connected to the pivot shaft and the recording section within the lower frame. Each guide member has a lower front half and a higher rear half, and a guide section for rolling the protective plate in the front and back direction is provided on the upper surface of the front half of each guide member. A guide part for rolling the holder shaft in the front-rear direction with respect to the protruding parts at both ends of the holder shaft protruding to the outside of both the protection plates is provided on the upper surface of the rear half, and a guide part for rolling the holder shaft in the back and forth direction is provided at the rear end of the guide part for rolling the holder shaft. 1. A roll paper support device for a recording machine, comprising a notch-shaped bearing portion that rotatably supports a holder by detachably engaging protruding portions at both ends. 2. In a clamshell-type recording machine in which the recording machine main body is divided into an upper frame and a lower frame, and the rear ends of both frames are connected by a pivot so that they can be opened and closed, a roll paper holder and a pair of The holder includes a holder shaft, a pair of disc-shaped protection plates, a spring receiving member that is locked near an end of the holder shaft on the outside of one of the protection plates, and a spring receiving member. and a spring provided between the holder and one of the protection plates to bias the one protection plate toward the other protection plate.A positioning boss is provided on the outer surface of the center of the other protection plate, and the holder The shaft is inserted into the shaft hole of the roll paper, a pair of protection plates are provided at both ends of the holder shaft, and the roll paper is held in the holder by sandwiching the roll paper from both sides, and the pair of guide members are inserted into the lower frame. The guide members are provided parallel to each other on both left and right sides between the pivot shaft and the recording section, and each guide member is provided on the outer surface of the spring receiving member and the second
a positioning guide surface that abuts the outer surface of the positioning boss portion of the protection plate and tilts so as to reduce the distance between the outer surfaces against the spring to position the protection plates in the axial direction; A holder shaft rolling guide portion formed downwardly downward to rollably guide both the protective plates and the protruding portions at both ends of the holder shaft protruding to the outside of the spring receiving member is provided. A roll paper support device for a recording machine, characterized in that a notch-shaped bearing portion is provided that rotatably supports the holder by detachably engaging the protruding portions at both ends of the holder shaft.