JPH0930694A - Recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent inverted setting of roll paper by permitting the user to notice that inverted setting has took place when the roll paper is set in an accommodation part. SOLUTION: At the two ends of roll paper 1, spools 3, 4 are installed in such a way as rotating in a single piece, and a bearing holder 13 is installed on the shaft 3c of one of the spools 3 through a one-way clutch 15, while the shaft 4c of the other spool 4 is held rotatably in a supporting groove 11 provided in a first supporting wall 7 of an accommodation part 6, and the bearing holder 13 is held in a fit groove 12 in the second supporting wall 8 in such a way as not capable of rotating. If set inversively, the roll paper 1 is hindered from rotating by the one-way clutch 15 when the recording sheet of paper 2 is to be drawn out, and a user can know the failure to contribute to prevention of the roll paper 1 from being set inversively.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording device using recording paper wound in a roll. In this specification, the recording paper in a rolled state is referred to as roll paper, and the one pulled out from the recording paper is referred to as recording paper.

2. Description of the Related Art Conventionally, a recording apparatus has been widely used in which a roll paper storage section is provided in an apparatus, a recording sheet is pulled out from a roll paper set in the storage section and conveyed to a printing section to perform a recording operation. There is. Usually, the storage section is simply a box, and the roll paper is put into the box and stored. Further, there is also known an accommodating unit having a structure in which spools are attached to both ends of roll paper and the shaft of the spool is rotatably held. In either case, the roll paper can be set in either forward or reverse directions. In many cases, a curl removing mechanism is provided in the conveyance path of the recording paper pulled out from the storage section, and the recording paper pulled out from the roll paper is conveyed to the printing section after the curl is removed by the curl removing mechanism. Was printed.

However, in such a configuration, since the roll paper can be set in the storage portion in either the forward or reverse direction, the roll paper may be set in the reverse direction, which adversely affects the recording. There was a problem. In the case of heat-sensitive recording, the heat-sensitive paint is applied to only one side of the recording paper, so if it is set reversely, the recording paper that has passed the recording position will be ejected without printing anything. You will notice the reverse set by observing this. However, in the case of a recording method that uses plain paper as the recording paper, such as an inkjet method, printing is performed even if the recording paper is set in the opposite direction. It is difficult to judge whether or not it will be used as it is.
If recording is performed with the roll paper set reversely, the bending direction when the recording paper pulled out from the roll paper passes through the curl removal mechanism will be the same as the winding direction of the roll paper, and the curl will be removed. I can't. For this reason, the recording paper is sent to the printing point with a curl, and the curl changes the distance between the print head and the recording paper, which adversely affects the printing. This adverse effect is particularly noticeable in the inkjet method in which a liquid ink is sprayed, and therefore, recording is continued in a state with uneven printing,
Had been a problem. The present invention has been made in view of the above-described problems, and it is possible to reliably detect the reverse setting of roll paper not only in recording using thermal paper but also in recording using plain paper, and to perform reverse setting. It is an object of the present invention to provide a recording device that can be prevented.

In order to solve the above-mentioned problems, the present invention holds a roll paper storage unit in a recording apparatus, a roll paper having spools attached at both ends thereof so that the shaft of the spool is rotatably supported. In addition, a rotation restricting unit that acts on at least one end side of the roll paper set in the storage unit and restricts the reverse rotation of the spool is provided. Here, a first support wall having a support groove rotatably holding the spool shaft at one end of the roll paper in the storage portion, and a bearing rotatably attached to the shaft of the spool at the other end of the roll paper. A holder and a second support wall having a fitting groove for fitting and holding the bearing holder in a non-rotatable manner are provided, and the rotation restricting means is arranged between the bearing holder and the shaft of the spool. It is preferable. Further, the storage section further includes an auxiliary first support wall having a support groove for rotatably holding the spool shaft at one end of the roll paper, corresponding to the setting position of the small-sized roll paper, and the roll paper. It is also preferable that the auxiliary second support wall provided with a fitting groove for non-rotatably fittingly holding the bearing holder attached to the shaft of the spool at the other end of the above is detachably provided. A one-way clutch, a spring clutch, or the like is suitable as the rotation restricting means. Further, a spool gear is provided on a spool attached to the end of the roll paper, and as a rotation restricting means for restricting the rotation of the spool, a planetary gear that meshes with the spool gear and is movable in the rotation direction of the spool gear, and the spool gear. The first gear, which is rotatably arranged at a position where the planetary gear moves and meshes when it rotates in the forward direction, and the planetary gear moves and meshes when the spool gear rotates in the opposite direction, so that the planetary gear cannot rotate. It is also possible to use one having a second gear arranged. In this case, a flange having a diameter larger than the maximum diameter of the roll paper is formed on the spool, a spool gear is formed on the outer periphery of the flange, and a position corresponding to the spool gear of the spool attached to the roll paper of a different size is further formed. In addition, it is preferable that the rotation restricting means is arranged respectively. Further, a ratchet gear may be formed on the spool instead of the spool gear, and a ratchet pawl may be provided in the storage portion so as to mesh with the ratchet gear to serve as the rotation restricting means. Even in this case, a flange having a diameter larger than the maximum diameter of the roll paper is formed on the spool, a ratchet gear is formed on the outer periphery of the flange, and the ratchet gear of the spool mounted on the roll paper of different size is further formed. It is preferable that the rotation restricting means is arranged at a position corresponding to the above. Further, the present invention also provides a recording device capable of detecting reverse setting without using the above-mentioned rotation restricting means. In the present invention, the recording device is pulled out from the roll paper set in the correct direction in the storage section. A first guide for guiding the recording paper to the transport path, a second guide for guiding the recording paper pulled out from the roll paper set in the storage portion in the opposite direction to the transport path, and the second guide. And a detection means for detecting the passage of the recording paper.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below. FIG. 1 is a schematic perspective view showing main components of a paper feeding section of a recording apparatus according to an embodiment of the present invention, and FIG. 2 is a schematic perspective view showing a state in which roll paper is set in a storage section provided in the recording apparatus, 3 is a schematic perspective view showing a state before setting the roll paper in the storage portion, FIG. 4 is a schematic plan view showing a state after setting the roll paper in the storage portion, and FIG. 5 is a record of the above embodiment. FIG. 6 is a schematic perspective view showing a paper feeding unit of the apparatus in a state where no roll paper is set, and FIG. 6 is a schematic perspective view showing a spool attached to one end surface of the roll paper. 1 to 6
In FIG. 1, 1 is a roll paper obtained by winding a recording paper in a roll shape, 2 is a recording paper drawn from the roll paper 1, 3,
Reference numeral 4 denotes a set of spools that can be attached to both ends of the roll paper 1 so as to rotate integrally. The set of spools 3 and 4 is provided at the center of the flanges 3a and 4a pressed against the end surface of the roll paper 1 and the inner surfaces of the flanges 3a and 4a (the surface facing the roll paper 1). A fitting portion 3b (see FIG. 6) that is tightly fitted in the core, and shafts 3c and 4c provided at the centers of the outer surfaces of the flanges 3a and 4a are provided. Reference numeral 6 denotes an accommodating portion for accommodating the roll paper 1 having the spools 3 and 4 attached to both ends thereof while rotatably holding the shafts 3c and 4c of the spools 3 and 4. The storage unit 6 has a first support wall 7 and a second support wall 8 located on both sides of the roll paper 1, a roll paper cover 9 arranged so as to surround the outer periphery of the roll paper 1, and the like. . First support wall 7
A support groove 11 that rotatably holds the shaft 4c of the spool 4 at one end of the roll paper 1 is formed in the. On the other hand, a fitting groove 12 is formed in the second support wall 8 so as to extend in the same direction as the support groove 11. The fitting groove 12 is provided to fit and hold the bearing holder 13 attached to the shaft 3c of the spool 3 in a non-rotatable manner. Fitting groove 12
A groove 12a is formed on a side surface of the bearing holder 13 for holding the bearing holder 13 so as not to move in the axial direction. On the other hand, a side surface of the bearing holder 13 is formed with a protrusion 13a that fits into the groove 12a. There is. Thus, the bearing holder 13
The bearing holder 13 can be fixed at a predetermined position in the fitting groove 12 by inserting the above into the fitting groove 12 from above, and conversely, it can be removed by pushing it upward. A one-way clutch 15 also serving as a bearing is attached to the center of the bearing holder 13, and the shaft 3c of the spool 3 is inserted into the one-way clutch 15.
By attaching the E-ring 16, the bearing holder 1
3 can be attached to the shaft 3c, and in this state, the bearing holder 13 holds the shaft 3c rotatably in one direction and non-rotatably in the opposite direction via the one-way clutch 15. Here, one-way clutch 15
1, the roll paper 1 is set in the correct direction in FIG. 1, and when the roll paper 1 and the spool 3 rotate in the forward direction indicated by the arrow A by pulling out the recording paper 2 from the roll paper 1, The rotation is allowed, but the reverse rotation is prevented. That is, the one-way clutch 15 constitutes a rotation restricting means for restricting the reverse rotation of the spool attached to the roll paper. As described above, by using the one-way clutch 15 as the rotation restricting means, it is possible to compactly mount the bearing holder 13, and the device is downsized by that amount without requiring an extra space. In FIGS. 1 and 5, reference numeral 18 is a conveyance roller that pulls out and conveys the recording paper 2 from the roll paper 1, and 19 is a cutter that cuts the recording paper 2. Although not shown, an ink jet type recording means is arranged downstream of the cutter 19 to perform recording on the supplied recording paper 2. The operation of the recording apparatus having the above configuration will be described below. When the user sets a new roll paper 1 in the storage part, the spools 3 and 4 are attached to both ends of the roll paper 1, the bearing holder 13 is attached to the shaft 3c of the spool 3, and the roll paper 1 is stored in that state. The shaft 4c of the spool 4 is held in the support groove 11 of the first support wall 7, and the bearing holder 13 is fitted and held in the fitting groove 12 by being inserted into the portion 6 from above. This allows the roll paper 1
Will be rotatably held in the storage portion 6, so that the recording paper 2 is pulled out from the roll paper 1 and the transport roller 18
Paper is threaded through the cutter 19 and the cutter 19. At this time, when the roll paper 1 is set in the correct direction, the roll paper 1 and the spool 3 are lightly rotated in the direction of arrow A (see FIG. 1) by pulling out the recording paper 2, and there is no problem. If the roll paper 1 is wrongly set in the reverse direction, the roll paper 1 and the spool 3 try to rotate in the reverse direction by pulling out the recording paper 2. At this time, the shaft 3 of the spool 3
Since the one-way clutch 15 attached to c blocks the reverse rotation of the roll paper 1, the recording paper 2 cannot be pulled out from the roll paper 1, and the user immediately notices that the roll paper 1 has been reversely set, Switch the setting direction of paper 1. Thus, the reverse setting of the roll paper 1 is reliably prevented. In the above embodiment, the second support wall 8
The bearing holder 13 is removable with respect to the above, but the present invention is not limited to this configuration, and the bearing holder 13 is not limited to this configuration.
The second support wall 8 and the second support wall 8 may be integrated, that is, the one-way clutch 15 may be directly attached to the second support wall 8. In that case, when the roll paper 1 is set in the storage unit 6, the shaft 3c of the spool 3 attached to the end of the roll paper 1 may be inserted into the one-way clutch 15 attached to the second support wall 8. . However,
The use of the bearing holder 13 that is removable from the second support wall 8 as in the illustrated embodiment has the advantage of facilitating the work of setting the roll paper 1. FIG. 7 is a schematic perspective view showing main components of a storage section in a recording apparatus according to another embodiment of the present invention. In this embodiment, the bearing holder 13A attached to the shaft 3c of the spool 3A attached to one end of the roll paper 1 is configured to simply hold the shaft 3c rotatably in both directions, and the bearing holder 13A and the shaft 3c. A spring clutch 21 is disposed between the spring clutch 21 and. When the roll paper 1 is set in the correct direction and the recording paper is pulled out from the roll paper 1 and the roll paper 1 and the spool 3A rotate in the forward direction indicated by the arrow A, the mounting direction of the spring clutch 21 is changed. It is designed to allow rotation but prevent rotation in the opposite direction. That is, the spring clutch 21 constitutes a rotation restricting means for restricting the reverse rotation of the spool attached to the roll paper. Other configurations are the same as those in the above-described embodiment. Also in the embodiment shown in FIG. 7, when the roll paper 1 is set in the reverse direction, the spring clutch 21 blocks the rotation of the roll paper 1 so that the user can be aware of the reverse setting. The reverse setting of roll paper can be prevented. Further, since the spring clutch 21 can be compactly installed on the shaft 3c,
This is effective for downsizing the device. Further, since the spring clutch 21 has a characteristic of giving an appropriate resistance when rotating in the direction in which the rotation is permitted, by appropriately designing the resistance value, the roll paper 1 can be moved in the positive direction. It is possible to act as a brake that gives an appropriate resistance to the shaft 3c when rotating, and it is possible to obtain an advantage that back tension can be applied to the recording paper pulled out from the roll paper 1. FIG. 8 shows a storage unit according to still another embodiment of the present invention. The storage portion 6A of this embodiment has a structure in which both ends of the roll paper cover 9 are integrated, and the first support wall 7A is provided.
And a second support wall 8A. This first support wall 7
A and the second support wall 8A are shown in FIG.
Alternatively, a support groove 11 for rotatably supporting the shaft 4c of the spool 4 at one end of the roll paper 1 and a spool 3 at the other end, which are similar to the first support wall 7 and the second support wall 8 shown in FIG. 3A
It has a fitting groove 12 for non-rotatably supporting the bearing holders 13 and 13A attached to the shaft 3c. Further, in the storage portion 6A, auxiliary first support walls 7B and second support walls 8B having similar configurations are detachably provided at positions inside the first support wall 7A and the second support wall 8A. . The mounting positions of the auxiliary first support wall 7B and the second support wall 8B are set in this storage section 6
Small size to be set in A (size of recording paper width is small)
It is set in accordance with the setting position of the roll paper. Other configurations are the same as those of the above-described embodiment. In the embodiment shown in FIG. 8, by removing the auxiliary first support wall 7B and the second support wall 8B, a large size roll paper is set using the outer first support wall 7A and the second support wall 8A. Further, by mounting the auxiliary first support wall 7B and the auxiliary second support wall 8B, it is possible to set a small-sized roll paper, and it is possible to cope with a plurality of sizes of roll paper. Here, it is preferable that the auxiliary first support wall 7A and the auxiliary second support wall 8A are detachably attachable to a plurality of places, so that roll paper of a larger size can be set. FIG. 9 is a schematic perspective view of main parts of still another embodiment of the present invention, and FIG. 10 is a schematic sectional view thereof. In this embodiment, as the spool attached to one end of the roll paper 1, a spool 3B is used which is a spool gear 3d formed by forming a gear on the outer circumference of a flange 3a having a diameter larger than the maximum diameter of the roll paper 1. On the other hand, the storage portion 6B for setting the roll paper 1 is provided with support walls 7 similar to the first support wall 7 in the above-described embodiment on both ends, and the spools 3B at both ends of the roll paper 1 and the shafts 3c of the rolls 3B, 4c is rotatably held. Further, in the storage portion 6B, in the position meshed with the spool gear 3d of the spool 3B attached to the roll paper 1 set in the storage portion 6B, in the state of meshing with the spool gear 3d, the spool gear 3d moves in the rotation direction. Possible planetary gears 25,
When the spool gear 3d rotates in the positive direction indicated by the arrow A, the first gear 26 rotatably arranged at a position where the planet gear 25 moves and meshes with the planet gear 25, and the planet gear 25 rotates when the spool gear 3d rotates in the opposite direction. A second gear 27, which is arranged so as not to rotate, is provided at a position where the second gear 27 moves and meshes. A cutout 28 is formed in the roll paper cover 9 of the storage portion 6B so as to allow the planetary gear 25 to move while meshing with the spool gear 3d. In the present embodiment, the planetary gear 25, the first gear 26, the second gear 27, etc. constitute rotation regulating means for regulating the reverse rotation of the spool attached to the roll paper. In the apparatus having the above configuration, the user attaches the spools 3B and 4 to both ends of the roll paper 1 and stores the roll paper 1 in the storage unit 6
It is set so that it can rotate at a predetermined position in B. Then, the spool gear 3d of the spool 3B meshes with the planet gear 25. Then, the recording paper 2 is pulled out from the roll paper 1 and a predetermined paper thread is performed. This time,
When the roll paper 1 is set in the correct direction, the roll paper 1 and the spool 3B rotate in the forward direction indicated by the arrow A when the recording paper 2 is pulled out. By this rotation, the planetary gear 25 moves in the same direction as the spool gear 3d, and the first gear 2
6 is engaged with and held in that position. Since the first gear 26 is rotatable, the recording paper can be pulled out from the roll paper 1 without any trouble. If the roll paper 1 is set in the reverse direction, the roll paper 1 and the spool 3B rotate in the reverse direction by pulling out the recording paper, and the planetary gear 25 also moves in the reverse direction accordingly, and the second gear 2
Engage with 7. Since the second gear 27 is non-rotatably provided, the roll paper 1 cannot be rotated, so that the user notices the reverse setting and changes the setting direction of the roll paper 1. Thus, reverse setting of roll paper is prevented. As described above, in the embodiment of FIGS. 9 and 10, the spools 3B and 4 are simply attached to both ends of the roll paper 1 and the shafts 3c and 4c thereof are attached.
Since the roll paper 1 may be set in the storage portion 6B so that the roll paper 1 is inserted into the support groove 11, there is an advantage that the work of setting the roll paper 1 is extremely easy. Further, in this embodiment, it is also possible to adopt a structure in which the first gear 26 is provided with an appropriate rotation resistance. With this structure, the roll paper is braked and the recording paper 2 pulled out from the roll paper 1 is applied. You can apply back tension. Further, in the embodiment shown in FIGS. 9 and 10, the planetary gear 25, the first gear 26, and the second gear 27 are not limited to one set, but a plurality of sets may be prepared in advance according to a plurality of roll paper sizes. It is also possible to provide the roll paper in a plurality of sizes.
When a plurality of sets of planetary gears 25, first gears 26, and second gears 27 are provided, the planetary gears 2 for small sizes are provided.
No. 5 is located at a position facing the outer peripheral surface of the roll paper 1 when the large size roll paper 1 is set, but the planet gear 25 is made larger in diameter than the maximum diameter of the roll paper 1. Since it is arranged in a position that meshes with the spool gear 3d, it does not come into contact with the outer periphery of the roll paper 1,
Therefore, the roll paper 1 is not damaged or the rotation of the roll paper 1 is not hindered. In the above embodiment, the spool gear 3
Although d is formed on the outer periphery of the flange 3a of the spool 3B and has a diameter larger than the maximum diameter of the roll paper 1, the present invention is not limited to this configuration and may have a diameter smaller than the maximum diameter of the roll paper 1. A spool gear may be provided on the shaft 3c. However, in this case, it is not possible to arrange the planetary gears 25 and the like at a plurality of positions according to the size of the roll paper, and therefore, the roll paper of a single size is used. FIG. 11 shows still another embodiment. In this embodiment, a spool 3C in which a ratchet gear 3e is formed on the outer circumference of a flange 3a having a diameter larger than the maximum diameter of the roll paper 1 is used as a spool attached to one end of the roll paper 1. The tooth profile of the ratchet gear 3e is not limited, but may be, for example, a waveform having different left and right inclinations as shown in FIG. On the other hand, on the side where the roll paper 1 is set, a ratchet claw 30 is provided so as to be swingable around a support shaft 31 so that it can be engaged with the ratchet gear 3e of the roll paper 1 set at a predetermined position, and Ratchet claw 30 to ratchet gear 3e
A spring (not shown) or its own weight is used to press it. The mounting direction of the ratchet gear 3e and the ratchet pawl 30 at this time is set so as to allow the roll paper 1 and the spool 3C to rotate in the forward direction indicated by the arrow A, but prevent the rotation in the opposite direction. Therefore, the ratchet pawl 30 constitutes a rotation restricting means for restricting the reverse rotation of the spool attached to the roll paper. Other configurations are the same as those of the embodiment shown in FIGS. Also in this embodiment, spools 3C and 4 are attached to both ends of the roll paper 1 and the roll paper 1 is stored in the storage portion 6B.
When it is set to a predetermined position, the ratchet claw 30 engages with the ratchet gear 3e, which prevents the roll paper 1 from rotating in the opposite direction, so that the user notices the reverse setting of the roll paper 1 and the reverse setting. Can be prevented. Furthermore, in this embodiment, since the ratchet pawl 30 is simply provided on the storage portion side, there is an advantage that the structure is simple. Note that, in the embodiment shown in FIG.
As in the above embodiment, by providing the ratchet claws 30 at a plurality of positions according to the roll paper size, it is possible to cope with a plurality of roll paper sizes. It is also possible to reduce the diameter of the ratchet gear 3e or to provide the ratchet gear 3e on the shaft 3c. FIG. 13 is a schematic side view showing still another embodiment of the present invention. In FIG. 13, the roll paper 1 is shown in a state of being set at a predetermined position in the storage section, and the arrow A
This is the rotation direction when the recording paper 2 is pulled out from the roll paper 1 in which the direction is correctly set. In this embodiment, a first guide 33 for guiding the recording paper 2 pulled out from the roll paper 1 correctly set in the storage unit to the transport path by the transport roller 18 between the storage unit and the transport roller 18, and The second guide 3 for guiding the recording paper 2a pulled out from the roll paper set in the storage portion in the opposite direction to the transport path.
4 and a detection means 35 for detecting the passage of the recording paper guided by the second guide 34. Note that 36
Is a paper detection sensor that detects whether or not there is the recording paper 2 in the transport path. In this embodiment, when the roll paper 1 is set in the opposite direction, the recording paper 2a pulled out from the roll paper 1 is guided by the second guide 34,
Therefore, the detection means 35 detects the passage of the recording paper 2a guided by the second guide 34 and outputs a warning signal. Thus, the user will notice the reverse set,
The reverse setting of roll paper can be prevented.

As is apparent from the above description, according to the present invention, a roll paper storage portion in a recording apparatus is stored with a roll paper having spools attached to both ends thereof while rotatably holding the spool shaft. In addition, it acts on the spool on at least one end side of the roll paper set in the storage section,
By providing the rotation restricting means for restricting the reverse rotation of the spool, when the roll paper set in the storage section is in the reverse direction, the user tries to pull out the recording paper from the roll paper. However, since the rotation restricting means restricts the reverse rotation of the spool, the recording paper cannot be pulled out. Therefore, the user notices the reverse setting of the roll paper,
Since the roll papers are replaced, the reverse setting of the roll papers can be prevented, and good recording can be always performed. Here, a first support wall having a support groove rotatably holding the spool shaft at one end of the roll paper in the storage portion, and a bearing rotatably attached to the shaft of the spool at the other end of the roll paper. A holder and a second support wall provided with a fitting groove for fitting and holding the bearing holder in a non-rotatable manner are provided, and the rotation restricting means is arranged between the bearing holder and the shaft of the spool. ,
Attach the bearing holder to the spool shaft at the end of the roll paper, then insert the bearing holder into the mating groove on the second support wall, and at the same time support the spool shaft on the opposite side of the roll paper to the first support wall. By inserting the roll paper into the groove, the roll paper can be set at a predetermined position in the storage portion, and the effect of facilitating the roll paper setting operation can be obtained. Further, the storage section further includes an auxiliary first support wall having a support groove for rotatably holding the spool shaft at one end of the roll paper, corresponding to the setting position of the small-sized roll paper, and the roll paper. An auxiliary second support wall having a fitting groove for non-rotatably fitting and holding the bearing holder attached to the shaft of the spool at the other end of
With the detachable structure, roll papers of different sizes can be set in the storage portion, and the flexibility of the apparatus can be expanded. Furthermore, when a one-way clutch is used as the rotation restricting means, it can be compactly incorporated and the device can be downsized. Further, when the spring clutch is used as the above-mentioned rotation restricting means, not only can it be compactly assembled to reduce the size of the apparatus, but also the spring clutch can provide an appropriate rotation resistance in the rotation direction. It is also possible to exert an appropriate back tension on the recording paper by applying a braking force to the. Furthermore, a spool gear is provided on the spool, and a planet gear that meshes with the spool gear and is movable in the rotation direction of the spool gear,
When the spool gear rotates in the forward direction, the planet gear moves and meshes with the first gear that is rotatably arranged in a meshed position, and when the spool gear rotates in the opposite direction, the planet gear moves and meshes with the meshed position. With the configuration in which the rotation restricting means having the second gear that is disabled is provided, when setting the roll paper, it suffices to simply attach the spools to both ends of the roll paper and set it in the storage section. The effect that the operation is easy is obtained. Furthermore, if a mechanism for imparting an appropriate rotational resistance to the first gear is connected, a braking effect is exerted on the roll paper, and an appropriate back tension can be imparted to the recording paper pulled out. Further, a flange having a diameter larger than the maximum diameter of the roll paper is formed on the spool, a spool gear is formed on the outer periphery of the flange, and further, at positions corresponding to spools attached to roll paper of different sizes, respectively. With the configuration in which the rotation restricting means is arranged, it is possible to cope with roll papers of a plurality of sizes, and the effect that the versatility of the apparatus is expanded can be obtained. If a ratchet gear is formed on the spool instead of the spool gear, and a ratchet pawl is provided in the storage portion so as to mesh with the ratchet gear, the rotation regulating means is provided.
The configuration of the device can be simplified and the cost can be reduced. Even in this case, a flange having a diameter larger than the maximum diameter of the roll paper is formed on the spool, and a ratchet gear is formed on the outer circumference of the flange,
Further, if the rotation restricting means is arranged at the positions corresponding to the spools attached to the roll papers of different sizes, roll papers of different sizes can be accommodated, and the flexibility of the apparatus can be expanded. Further, the present invention is, a first guide for guiding the recording paper pulled out from the roll paper set in the storage unit in the correct direction to the transport path,
A second guide for guiding the recording paper pulled out from the roll paper set in the storage portion in the opposite direction to the transport path,
By providing the detection means for detecting the passage of the recording paper guided by the second guide, when the roll paper is set in the opposite direction, the recording paper pulled out from the roll paper is the second guide. As a result, the detection means detects the passage of the recording paper guided by the second guide, thereby preventing the reverse setting of the roll paper and achieving an excellent image recording. Have

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing main components of a paper feeding unit of a recording apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic perspective view showing a state in which roll paper is set in a storage unit provided in the recording apparatus of FIG.

FIG. 3 is a schematic perspective view showing a state before setting the roll paper in the storage section shown in FIG.

FIG. 4 is a schematic plan view showing a state after setting the roll paper in the storage section shown in FIG.

5 is a schematic perspective view showing a paper feeding unit of the recording apparatus shown in FIG. 1 in a state in which no roll paper is set.

FIG. 6 is a schematic perspective view showing a spool attached to one end surface of roll paper.

FIG. 7 is a schematic perspective view showing main components of a storage unit in a recording apparatus according to another embodiment of the present invention.

FIG. 8 is a schematic perspective view showing a paper feeding unit according to still another embodiment of the present invention with no roll paper set therein.

FIG. 9 is a schematic perspective view of main parts of still another embodiment of the present invention.

FIG. 10 is a schematic sectional view of a portion shown in FIG.

FIG. 11 is a schematic perspective view of main parts of still another embodiment of the present invention.

FIG. 12 is a schematic perspective view showing the tooth profile of the ratchet gear of the embodiment shown in FIG.

FIG. 13 is a schematic side view showing still another embodiment of the present invention.

[Explanation of symbols]

 1 Roll Paper 2 Recording Paper 3, 3A, 3B, 3C, 4 Spool 3a, 4a Flange 3c, 4c Shaft 3d Spool Gear 3e Ratchet Gear 6, 6A, 6B Storage Part 7, 7A First Support Wall 7B Auxiliary First Support Wall 8, 8A Second support wall 8B Auxiliary second support wall 9 Roll paper cover 11 Support groove 12 Fitting groove 13, 13A Bearing holder 18 Conveying roller 19 Cutter 25 Planetary gear 26 First gear 27 Second gear 30 Ratchet claw 33 First guide 34 Second guide 35 Detection means

Claims (10)

[Claims] 1. A set of spools that can be attached to both ends of a roll paper and have a shaft at the center, and roll paper that has the spool attached to both ends are stored while the shaft of the spool is rotatably held. A recording apparatus comprising: a storage section; and a rotation restricting unit that operates on at least one spool and restricts rotation of the spool in a reverse direction. 2. The first support wall, wherein the storage portion has a support groove for rotatably holding the shaft of the spool at one end of the roll paper,
It has a bearing holder rotatably attached to the shaft of the spool at the other end of the roll paper, and a second support wall provided with a fitting groove for non-rotatably fittingly holding the bearing holder.
The recording apparatus according to claim 1, wherein the rotation restricting unit is arranged between the bearing holder and the shaft of the spool. 3. The auxiliary first support wall, wherein the storage section further includes a support groove for rotatably holding the spool shaft at one end of the roll paper corresponding to the setting position of the small-sized roll paper, The auxiliary second support wall having a fitting groove for non-rotatably fittingly holding a bearing holder attached to the shaft of the spool at the other end of the roll paper is detachably provided. Recording device. 4. The recording apparatus according to claim 1, wherein the rotation restricting means is a one-way clutch. 5. The recording apparatus according to claim 1, wherein the rotation restricting means is composed of a spring clutch. 6. The spool comprises a spool gear,
The rotation restricting means is rotatably arranged at a position meshing with the spool gear and movable in the rotation direction of the spool gear, and the planet gear moving and meshing when the spool gear rotates in the positive direction. 2. The recording apparatus according to claim 1, further comprising a gear and a second gear that is non-rotatably arranged at a position where the planet gear moves and meshes when the spool gear rotates in the opposite direction. 7. The spool comprises a flange having a diameter larger than the maximum diameter of the roll paper, a spool gear is formed on the outer periphery of the flange, and the spool gear is mounted on different sizes of roll paper at a position corresponding to the spool gear. , And rotation restricting means are respectively arranged.
The recording device according to any one of the preceding claims. 8. The recording apparatus according to claim 1, wherein the spool is provided with a ratchet gear, and the rotation restricting means has a ratchet pawl provided in the storage portion so as to mesh with the ratchet gear. 9. The spool is provided with a flange having a diameter larger than the maximum diameter of the roll paper, and a ratchet gear is formed on the outer periphery thereof, and further corresponds to the ratchet gear of the spool attached to the roll paper of different sizes. 9. The recording apparatus according to claim 8, wherein rotation restricting means are arranged at the respective positions. 10. An accommodating section for rotatably accommodating roll paper, a conveyance path for conveying a recording sheet pulled out from the roll paper set in the accommodating section to a printing position, and set in the accommodating section in the correct direction. A first guide for guiding the recording paper drawn out from the rolled paper to the conveyance path, and a second guide for guiding the recording paper drawn out from the roll paper set in the storage portion in the opposite direction to the conveyance path, A recording device including a detection unit that detects passage of a recording sheet guided by the second guide.