JP4140074B2 - Ink ribbon feeder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a printing apparatus such as a facsimile machine, and more particularly to an ink ribbon feeding mechanism of a printing apparatus that employs a thermal recording method.
[0002]
[Prior art]
  In a facsimile apparatus which is an example of a thermal recording type printing apparatus, an ink ribbon for recording is arranged in a conveyance path of recording paper (usually plain paper), and the recording head is arranged with the ink ribbon arranged on the recording paper. Thus, recording is performed by supplying heat to the ink ribbon. The ink ribbon is usually wound on one roll, and this is wound on a winding roll. The ink ribbon is held in a state of being stretched between the supply-side roll and the take-up-side roll, and a recording paper is disposed thereon, and heat is applied by the head.
[0003]
  FIG. 14 is a plan view showing a conventional ink ribbon feeding mechanism. In FIG. 14, the ink ribbon 1 is wound around the supply side roller 2, and the winding end is wound around the winding side roller 3. That is, the ink ribbon 1 is wound up in the direction of the arrow in the drawing. Both the supply side roller 2 and the take-up side roller 3 are supported substantially horizontally with respect to the bottom plate by support frames 6 and 6 extending vertically from the bottom plate (not shown) of the facsimile apparatus.
[0004]
  The winding operation of the ink ribbon 1 is performed by a friction mechanism 5 that drives the winding side roller 3. The friction mechanism 5 is provided with a predetermined rotational driving force, and has a driving gear that meshes with a gear that is coaxially attached to one end (right side in FIG. 14) of the shaft of the winding roller 3. The winding roll 3 is rotated by the rotation of the drive gear, and the ink ribbon 1 is wound in the direction shown in the drawing. However, if the rotational speed of the drive gear is fixed, the ink ribbon 1 is wound up as the amount of the ink ribbon 1 wound up on the winding-side roll 3 increases (that is, the diameter of the wound up ink ribbon increases). Since the speed increases, a deviation from the rotational speed of a platen roller (not shown) that conveys the recording paper occurs. Therefore, when a frictional force greater than a predetermined value is applied to the drive gear, the drive gear is idled to absorb the difference from the rotation speed of the platen roller. The other end (left side in FIG. 14) of the take-up roller 3 is rotatably held by a bearing provided on the support frame 6, but no driving force is applied.
[0005]
  On the other hand, a back tension mechanism 4 is provided at the left end of the supply side roller 2. The back tension mechanism 4 applies a predetermined rotational force (opposite to the arrow in the figure) in the direction opposite to the winding side roll 3 with respect to the axis of the supply side roll 2 to prevent the ink ribbon 1 from sagging. . On the other hand, the supply side roller 2 is also only supported rotatably by the support frame 6 at the end opposite to the back tension mechanism 4 and is not given any driving force. By the action of the friction mechanism 5 and the back tension mechanism 4, the ink ribbon 1 is held with a constant tension (tension) between the supply side and the take-up side, so that cutting and sagging of the ink ribbon are prevented.
[0006]
  Further, in this type of ink ribbon feeding mechanism, a release plate for releasing the ink ribbon heated while being pressed between the recording head and the platen roller from the recording paper is provided between the recording head and the take-up roller. It is generally provided between the two. This release plate is formed integrally with the bottom body cover and frame made of resin, etc. for facsimile machines, etc. for reasons of material and manufacturing process, and is a longitudinal slide extending in parallel with the rotation axis of the take-up roll. The sliding surface is configured to peel the ink ribbon from the recording paper transported upward by contacting the ink ribbon from below and applying tension thereto. Therefore, in addition to the above-described friction mechanism and back tension mechanism, the action of the peeling plate prevents the ink ribbon from being cut and slacked by giving a constant tension to the ink ribbon while peeling the ink ribbon.
[0007]
[Problems to be solved by the invention]
  However, in the conventional ink ribbon feeding mechanism, the friction mechanism and the back tension mechanism are located on the opposite side with respect to the winding direction of the ink ribbon. That is, when viewed in a plan view as shown in FIG. 14, the friction mechanism and the back tension mechanism are arranged at diagonal positions of the wide ink ribbon. That is, in FIG. 14, the friction mechanism 5 is on the right side while the back tension mechanism 4 is on the left side. For this reason, when winding the ink ribbon, the driving force for winding by the friction mechanism and the driving force by the back tension mechanism are located at the opposite end of the ink ribbon, so a twisting force is generated in the ink ribbon, This causes wrinkles on the ink ribbon. The wrinkles of the ink ribbon cause deterioration in printing quality and instability.
[0008]
  In addition, since a drive mechanism, a gear mechanism, and the like are disposed on both sides of the ink ribbon, the width of the ink ribbon feeding mechanism itself is considerably increased, which hinders space saving.
[0009]
  The present invention has been made in view of the above points, and by eliminating wrinkles and sagging of the ink ribbon, it is possible to stabilize the print quality, and it is possible to reduce the size and cost. It is an object of the present invention to provide an ink ribbon feeding device for a facsimile machine.
[0010]
[Means for Solving the Problems]
  In order to solve the above-mentioned problem, the invention according to claim 1 is an ink ribbon feeder, wherein a supply roll support portion that rotatably supports a supply roll around which the ink ribbon is wound, and a winding for winding up the ink ribbon. In order to wind up the ink ribbon in the ribbon winding direction from the supply roll to the take-up roll, provided on one end of the take-up roll, and a take-up roll support portion that rotatably supports the take-up roll. A first driving unit that rotates the winding roll; and a second driving unit that rotates the supply roll in a direction opposite to the winding roll, and the second driving unit includes both ends of the winding roll. Of the first and second driving units on the same side with respect to the ribbon winding direction.And a recording unit that contacts the ink ribbon from below between the supply roll and the take-up roll, and a support frame that supports the recording unit. Of the two end portions, a first support portion for supporting an end portion on the side where the first and second drive portions are provided, and an end portion on the opposite side to the first support portion of the recording unit, A second support portion that is supported at a position higher than the one support portion.Configure to be.
[0011]
  According to the ink ribbon feeding apparatus configured as described above, the supply roll support unit rotatably supports the supply roll of the ink ribbon, and the take-up roll support unit rotatably supports the take-up roll support unit. The first drive unit rotates the take-up roll so as to take up the ink ribbon in the ink take-up direction, and the second drive unit rotates the supply roll in the opposite direction to the first drive unit in order to apply tension to the ink ribbon. . The first drive unit and the second drive unit are provided at the end portions on the same side of the winding roll and the supply roll ribbon with respect to the winding direction, respectively.A recording unit that is in contact with the ink ribbon from below between the supply roll and the take-up roll; and a support frame that supports the recording unit, wherein the support frame includes both end portions of the recording unit. The first support portion that supports the end portion on the side where the first and second drive portions are provided, and the end portion on the opposite side of the first support portion of the recording unit is the first support portion. And a second support part that is supported at a position higher than the part.
[0012]
[0013]
  According to the ink ribbon feeder configured as described above, the recording unit is positioned higher on the side where the first and second drive units are provided than on the side where the first and second drive units are provided. Touch the ink ribbon.
[0014]
  Claim2The described invention is claimed.1In the described ink ribbon feeding device, the winding roll support part and the supply roll support part are configured integrally with the support frame.
[0015]
  According to the ink ribbon feeding device configured as described above, the take-up roll, the supply roll, the first support portion, and the second support portion are integrally provided on the support frame.
[0016]
  Claim3The described invention is claimed.1Or2In the ink ribbon feeding device described above, the first support portion is a vertical plate-like member that supports the recording unit at a first height, and the second support portion is a first plate that is higher than the first height. The vertical plate member supports the recording unit at a height of 2.
[0017]
  According to the ink ribbon feeding device configured as described above, the first support portion and the second support portion are configured by plate-like members.
[0018]
  Claim4The described invention is claimed.1Or2In the ink ribbon feeding device described above, the first support portion is a plate-like member having a screw hole for fixing the recording unit with a screw at a first height, and the second support portion is the plate. And a thick washer member disposed between the screw hole and the screw hole of the recording unit.
[0019]
  According to the ink ribbon feeder configured as described above, the second support portion is configured by the same plate-like member as the first support portion and a washer member.
[0020]
[0021]
[0022]
[0023]
[0024]
[0025]
[0026]
[0027]
[0028]
[0029]
[0030]
[0031]
[0032]
[0033]
[0034]
DETAILED DESCRIPTION OF THE INVENTION
  Preferred embodiments of the present invention will be described below with reference to the drawings.
[0035]
  First embodiment
  FIG. 1 is a plan view of an ink ribbon feeding device according to an embodiment of the present invention, and FIG. 2 is a perspective view thereof.
[0036]
  As shown in FIG. 1, in the ink ribbon feeding device 10 according to the first embodiment, the friction mechanism 5 and the back tension mechanism 4 are arranged on the same side with reference to the feeding direction 17 (arrow) of the ink ribbon 1. Is done. In FIG. 1, the friction mechanism 5 is attached to the right end portion of the take-up roll 3, and the back tension mechanism 4 is also connected to the right end portion of the supply roll 2, that is, the feeding direction 17 of the ink ribbon 1. It is arranged on the same side. By doing so, no twisting force is generated, and the ink ribbon can be prevented from wrinkling due to the twisting.
[0037]
  A dotted line 12 in FIG. 1 is the position of the support frame 6 when the back tension mechanism is arranged on the left side as in the prior art. In the conventional apparatus shown in FIG. 14, the back tension mechanism is located at the left end portion of the supply roll, so that a corresponding space is required between the supply roll and the support frame. However, by arranging both mechanisms on the same side as in the present embodiment, the width of the ink ribbon feeding mechanism can be reduced. Thereby, the ribbon cassette etc. which accommodate an ink ribbon can also be made small, and cost reduction is attained.
[0038]
  FIG. 2 is a perspective view of the ink ribbon feeding device 10, and FIG. 3 is a perspective side view of the ink ribbon feeding device 10 viewed from the right side (side on which a friction mechanism and the like are provided). The recording paper 8 is conveyed by a supply mechanism (not shown) and is brought into close contact with the ink ribbon 1 by the platen roller 7. The shafts of the supply roll 2 and the take-up roll 3 are rotatably supported by a bearing portion 13 provided on the support frame 6. The ink ribbon 1 is wound around the winding roll 3 in a state where an appropriate tension is applied by the friction mechanism 5 and the back tension mechanism 4. In a passage path of the ink ribbon 1 from the supply roll 2 to the take-up roll 3, a recording unit 9 having a recording head or the like is provided below the platen roller 7 and on the side opposite to the platen roller 7 with respect to the ink ribbon 1. It arrange | positions in the state supported by the support frame 6. FIG.
[0039]
  FIG. 4 is a plan view showing the positional relationship between the supply roll, the winding roll, and the recording unit when there is no ink ribbon. The supply roll 2 and the take-up roll 3 are respectively received in bearing portions 13 provided on the support frame 6 and are rotatably supported. In the support frame 6, a flange 6 a is provided between the bearing portion 13 for the supply roll 3 and the bearing portion 13 for the take-up roll 2, and a screw hole is provided in the flange 6 a. The recording unit 9 is provided with screw holes at both end portions 9a of the housing, and is fixed to the support frame 6 with screws.
[0040]
  As described above, by providing the friction mechanism and the back tension mechanism on the same side, the rotational driving force for winding up the ink ribbon acts on the same side with respect to the ink ribbon feeding direction. No twisting force is generated. Therefore, wrinkles are not generated in the ink ribbon 1 due to the twisting force, and the printing quality can be stabilized. Also, by arranging both mechanisms on the same side, the space required for arranging and storing the mechanisms can be eliminated. That is, as shown in FIG. 1, when the friction mechanism and the back tension mechanism are arranged on one side, a drive mechanism, a gear mechanism and the like are not required on the left side of the ink ribbon 1, and the support frame 6 is arranged closer to the ink ribbon side. And can be miniaturized.
[0041]
  Second embodiment
  In the first embodiment, the friction mechanism and the back tension mechanism for winding the ink ribbon are arranged on the same side. However, in this case, there is a slight difference in the tension applied to the ink ribbon between the side where both mechanisms are provided and the side where both mechanisms are not provided. That is, on the side where both mechanisms are provided, a constant force is always applied to the ink ribbon by both mechanisms, whereas on the side where no function is provided, no force is applied to the ink ribbon. . Therefore, although the tension on the side where the mechanism is provided is transmitted to the reverse side of the ink ribbon to some extent, the tension on the side where the mechanism is not provided, particularly the end of the ink ribbon, is smaller than that on the side where the mechanism is provided. For this reason, there is a tendency that tension is insufficient and wrinkles are easily formed on the ink ribbon, particularly at the end where the mechanism is not provided.
[0042]
  From this point of view, in the second embodiment, not only the friction mechanism and the like are provided on the same side, but also a structure that compensates for the insufficient tension of the ink ribbon on the side where the friction mechanism or the like is not provided. An example of this is shown in FIGS. FIG. 5 is a perspective view of the ink ribbon feeding mechanism 20 according to the second embodiment, and FIG. 6 is a front view thereof (the ink ribbon is not shown). As shown in the figure, in the ink ribbon feeding mechanism 20, the position of the portion of the recording unit 9 that contacts the ink ribbon 1 is higher on the opposite left side than on the right side where the friction mechanism 5 and the back tension mechanism 4 are provided. Configure to be That is, when viewed from the front as shown in FIG. 6, the recording unit 9 is supported by the support frame 6 so as to rise to the left. All of the supply side roller 2, the take-up side roller 3, the platen roller 7 and the like other than the recording unit 9 are supported by the support frame 6 so as to be substantially parallel to the bottom plate of the main body of the facsimile apparatus.
[0043]
  Specifically, the height h of the flange portion of the support frame 6 shown in FIG. 3 is adjusted, and the height h of the support frame 6 on the side (left side) where the friction mechanism or the like is not provided is determined by the friction portion or the like. The support frame 6 itself is formed so as to be slightly higher than the height h of the side (right side) support frame 6 provided. By doing so, the left end portion of the recording unit 9 supports the ink ribbon 1 at a position higher than the right end portion, and the tension of the ink ribbon near the left end portion is increased. Accordingly, it is possible to compensate for the difference from the tension of the ink ribbon in the vicinity of the right end, and to significantly reduce the possibility of wrinkling near the left end of the ink ribbon.
[0044]
  An alternative method is shown in FIG. In this method, instead of deforming the shape of the support frame 6 as shown in FIG. 6, the same shape of the support frame 6 is used on the left and right sides, and the left flange portion 6a and the left flange portion 9a of the recording unit 9 are connected. A member 14 such as a washer having an appropriate thickness is inserted between them, and the recording unit 6 is arranged to rise to the left. This method can also compensate for the lack of tension on the side without the friction mechanism.
[0045]
  As a result of an experiment using an ink ribbon (width of about 218 mm) that can be recorded on A4 size recording paper, it is preferable to raise the side without the friction mechanism or the like by about 0.6 to 1.2 mm. It was.
[0046]
  Third embodiment
  The third embodiment is the same as the second embodiment in that the feeding device is configured to compensate for the lack of tension on the side where no friction mechanism or the like is provided. FIG. 8 is a plan view showing a configuration of an ink ribbon feeding mechanism according to the third embodiment. As shown in FIG. 8, in the ink ribbon feeding device 30 according to the present embodiment, the supply roll 2 and the take-up roll 3 are made non-parallel so that the side on which the friction mechanism is not provided is more open. Roll 2 is placed.
[0047]
  More specifically, the distance L1 between the supply roll 2 on the side where the friction mechanism is not provided and the take-up roll 3 is made longer than the distance L2 on the side where the friction mechanism is provided. This is realized by arranging the position of the bearing portion 13 of the supply roll 2 in the left support frame 6 behind the position in the right support frame 6. That is, the left end of the supply roll 2 is arranged rearward, and the other winding roll 3, recording unit 9, platen roll 7 and the like are substantially parallel to the bottom plate of the facsimile apparatus main body, as in the first embodiment. maintain. In this way, the distance between the supply roll 2 and the take-up roll 3 on the left side where no friction mechanism or the like is provided is increased, so that the tension of the ink ribbon in the vicinity of the left end can be increased, resulting in insufficient tension. It is possible to compensate.
[0048]
  In the above example, the supply roll 2 is inclined, but theoretically, the supply roll 2 may be maintained substantially parallel to the platen roller 7 and the winding roll 3 may be inclined. That is, as long as there is no problem in the operation of pulling out the ink ribbon 1 from the supply roll 2 or the operation of winding the ink ribbon 3 onto the winding roll 3, any of them can be arranged obliquely.
[0049]
  In the above description, the example in which the friction mechanism is arranged on the right side has been described. However, it is of course possible to arrange the friction mechanism on the left side.
[0050]
  Fourth embodiment
  Next, a fourth embodiment of the ink ribbon feeding device of the present invention will be described with reference to FIGS. In FIG. 9, the same members as those shown in FIG. 3 are denoted by the same reference numerals, and the description thereof is omitted.
[0051]
  As shown in FIG. 9, the ink ribbon feeding device 40 of the present embodiment applies tension to the ink ribbon 1 between the platen roller 7 and the take-up roll 3, and the ink ribbon 1 from the recording paper 8 after recording. A release plate 101 is attached to the support frame 6 ′. Further, a rib 102 for applying tension to the ink ribbon 1 is erected on the support frame 6 ′ between the platen roller 7 and the supply roll 2. The recording head 9c is mounted on a recording head support plate 9d attached to the rib 102, and is urged toward the platen roller 7 by a spring 9e.
[0052]
  As shown in FIG. 10, the release plate 101 has a long sliding surface extending in a direction intersecting the ribbon winding direction of the ink ribbon 1, and contacts the ink ribbon 1 from below with the sliding surface. The ink ribbon 1 is peeled off from the recording paper 8 after recording. Further, the release plate 101 is provided with a pair of screw holes 101a for fixing to the support frame 6 ′ at both ends, and further, a convex provided on the support frame 6 ′ adjacent to the screw hole 101a. A pair of positioning holes 101b to be fitted in the part are provided.
[0053]
  The ink ribbon feeding device 40 fixes both ends of the peeling plate 101 at different heights with reference to the support frame 6 ′ or the recording unit 9, as exemplified below with reference to FIGS. 11 to 13. And a fixing means.
[0054]
  Next, a specific example of this fixing means will be described with reference to FIGS.
[0055]
  First, as shown in FIG. 11, an example of a fixing means is a male 105 for fixing one of a spacer 105 having a predetermined thickness and a screw hole 101 a provided at both ends of the peeling plate 101 by engaging the spacer 105. A screw 103. Further, the fixing means includes a male screw (not shown) that fixes the other of the screw holes 101a without biting the spacer 105. Therefore, according to the thickness of the spacer 105, the height h ′ (see FIG. 9) of the peeling plate 101 can be made different at both ends.
[0056]
  Further, a configuration in which the spacer 105 as shown in FIG. 11 is engaged and fixed with the male screw 103 may be provided on both sides of the peeling plate 101. That is, the fixing means may be composed of two spacers having different thicknesses and two male screws that respectively fix the screw holes 101a provided at both ends by engaging the two spacers. . Even if comprised in this way, according to the difference of the thickness of two spacers, height h 'of the peeling board 101 can be made different in the both ends.
[0057]
  In the case of the example shown in FIG. 11, the thickness of the spacer 105 to be used is determined by, for example, process inspection in the production line. More specifically, a plurality of types of spacers 105 having different thicknesses are used to print out several sheets on the recording paper 1, and the spacer 105 that minimizes the wrinkles and sagging of the ink ribbon 1 is the subsequent production line. Used in
[0058]
  Next, as shown in FIG. 12, in another example of the fixing means, a pair of screw holes 101a 'are provided at both ends of the vertically standing portion of the peeling plate 101'. Then, at a position corresponding to one of these screw holes 101a ', a long hole 6b is provided in the longitudinal direction in the height direction in the rib portion 6a "provided upright from the support frame 6". Then, the male screw 113 is fitted into the elongated hole 6b through the washer 114 and engages with the screw hole 101a ′, so that the end portion of the peeling plate 101 ′ on the side where the one hole 101a ′ is provided. It is configured to be fixed. On the other hand, the other end of the peeling plate 101 ′ (not shown) is fixed by a male screw through a non-longitudinal hole provided in the rib portion 6 ″ with no freedom in the height direction. The height h ′ (see FIG. 9) of the peeling plate 101 can be made different at both ends according to the vertical position of the long hole 6b.
[0059]
  Moreover, you may make it provide the structure fixed with the external thread 113 through the long hole 6b as shown in FIG. Even with this configuration, the height h ′ of the peeling plate 101 can be made different at both ends in accordance with the difference between the vertical fixing positions of the two long holes.
[0060]
  Next, as shown in FIG. 13, another example of the fixing means includes a fixing male screw 123 for fixing the peeling plate 101 ″ to the support frame 6 ′ in a screw hole 101a ″ provided in the peeling plate 101 ″, and a peeling. And a height adjusting male screw 126 which is screwed into a screw hole 101b ″ provided in the plate 101 ″ and whose tip abuts against the upper surface of the support frame 6 ′. After defining the distance between the upper surface of the plate 101 and the lower surface of the release plate 101, the release plate 101 ″ can be fixed to the support frame 6 ′ by the fixing male screw 123. That is, the height h ′ (see FIG. 9) of the peeling plate 101 ″ can be made different at both ends in accordance with the screwing condition of the height adjusting male screw 126.
[0061]
  Further, a configuration in which the height h ′ of the peeling plate 101 ″ can be adjusted by the screw hole 101b ″ and the height adjusting male screw 126 as shown in FIG. Good. Even in such a configuration, the height h ′ of the peeling plate 101 ″ can be made different at both ends thereof according to the difference in the screwing degree of the two male screws 126 for height adjustment.
[0062]
  In the fourth embodiment, the rib 102 shown in FIG. 9 may be integrally formed with, for example, a support frame 6 ′ formed of resin, and is formed of a separate member from the support frame 6 ′ and screwed. It may be added later. When the rib 102 is formed of a member different from the support frame 6 ′, the height of both ends of the rib 102 is made different using a fixing means as in the case of the peeling plate 101 described above. You may comprise. In this case, both the peeling plate 101 and the rib 102 may be configured to have different heights at both ends. Alternatively, the heights of both ends of the rib 102 may be different from each other (in this case, since it is not necessary to adjust the height of both ends of the peeling plate 101, the peeling plate 101 It may be formed integrally with the support frame 6). According to the study by the inventors of the present application, for example, the height of both ends on the side of the peeling plate 101 is about 0. If the difference is several mm (for example, 0.5 mm), a sufficient effect for preventing wrinkles and sagging of the ink ribbon 1 can be obtained. If the difference is 5 to 10 mm)), an effect sufficient to prevent wrinkles and sagging of the ink ribbon 1 can be obtained. That is, the difference in height is less when the height is adjusted at both ends of the peeling plate 101 between the recording unit 9 and the winding roll 3.
[0063]
  As described above, according to the fourth embodiment, the tension balance between the right and left sides of the ink ribbon 1 is made different by making the heights at both ends of the peeling plate 101 independent of the recording unit 9 and the support frame 6 different. Compared to the case where the heights at both ends of the entire recording unit 9 are different, or the heights at both ends of the release plate integrally formed with the support frame 6 made of resin or the like are different. Thus, the configuration for adjusting the height at both ends is simple, and the adjustment method is also simple. Therefore, the fourth embodiment is very advantageous in reducing the cost of the apparatus parts and the cost of the manufacturing process including the process of balancing the tension on the right and left of the ink ribbon.
[0064]
【The invention's effect】
  According to the first aspect of the present invention, since the first drive unit and the second drive unit are provided on the same side with respect to the ribbon winding direction, no twisting force is applied to the ink ribbon. This can prevent wrinkles from occurring. Thereby, the printing quality is stabilized. Further, since the mechanisms of the first drive unit and the second drive unit can be arranged on the same side, space can be saved, and the apparatus can be reduced in size and cost.Further, since the recording unit is in contact with the ink ribbon at a position higher than the side where the first and second driving units are provided on the side where the first and second driving units are not provided, the driving unit is provided. It is possible to compensate for the insufficient tension of the ink ribbon on the non-printing side and prevent wrinkles. Therefore, the print quality can be further stabilized.
[0065]
[0066]
  Claim2According to the described invention, the winding roll, the supply roll, the first support portion, and the second support portion are integrally provided on the support frame, so that the support portion of each member is reduced in size and cost. It becomes possible.
[0067]
  Claim3According to the described invention, since the first support portion and the second support portion are configured by plate-like members, the support frame can be easily manufactured, and the space of the apparatus can be saved.
[0068]
  Claim4According to the described invention, since the second support portion is configured by the same plate-like member as the first support portion and a washer member, a common member is used for the first support portion and the second support portion. This can reduce the cost.
[0069]
[0070]
[0071]
[0072]
[0073]
[0074]
[0075]
[Brief description of the drawings]
FIG. 1 is a plan view of an ink ribbon feeder according to a first embodiment of the present invention.
FIG. 2 is a perspective view of the ink ribbon feeder shown in FIG.
FIG. 3 is a transparent side view of the ink ribbon feeding device shown in FIG. 1;
FIG. 4 is a plan view showing an arrangement of a supply roll, a take-up roll, and a recording unit.
FIG. 5 is a perspective view of an ink ribbon feeder according to a second embodiment of the present invention.
6 is a front view of the ink ribbon feeding device shown in FIG.
FIG. 7 is a front view of another example of the ink ribbon feeding device according to the second embodiment.
FIG. 8 is a plan view of an ink ribbon feeding device according to a third embodiment.
FIG. 9 is a transparent side view of an ink ribbon feeder according to a fourth embodiment of the present invention.
FIG. 10 is a perspective view of a peeling plate provided in the ink ribbon feeder of the fourth embodiment.
11 is a cross-sectional view of an example of fixing means for fixing the release plate of FIG. 9;
12 is a cross-sectional view of another example of fixing means for fixing the peeling plate of FIG.
13 is a cross-sectional view of another example of fixing means for fixing the peeling plate of FIG.
FIG. 14 is a plan view showing a conventional ink ribbon feeding mechanism.
[Explanation of symbols]
  1 ... Ink ribbon
  2 ... Supply roll
  3 ... Winding roll
  4 ... Back tension mechanism
  5. Friction mechanism
  6, 6 '... Support frame
  7 ... Platen roller
  8 ... Recording paper
  9 ... Recording unit
  9c: Recording head
  9d: Recording head support plate
  9e ... Spring
  10, 20, 30, 40 ... Ink ribbon feeder
  13 ... Bearing part
  101 ... peeling plate
  102 ... ribs
  103, 113, 123 ... male thread
  105 ... Spacer

Claims (4)

A supply roll support section for rotatably supporting a supply roll wound with an ink ribbon;
A take-up roll support that rotatably supports a take-up roll for taking up the ink ribbon;
A first drive unit that is provided at one end of the take-up roll and rotates the take-up roll in order to take up the ink ribbon in the ribbon take-up direction from the supply roll to the take-up roll;
A second drive unit that rotates the supply roll in a direction opposite to the winding roll;
The second drive unit is provided at an end on the same side as the first drive unit with respect to the ribbon winding direction among both ends of the winding roll ,
A recording unit that contacts the ink ribbon from below between the supply roll and the take-up roll;
A support frame for supporting the recording unit,
The support frame includes: a first support portion that supports an end portion of the recording unit on the side where the first and second drive portions are provided; and the first support portion of the recording unit. An ink ribbon feeding apparatus comprising: a second support portion that supports an end portion on the opposite side at a position higher than the first support portion . The take-up roll support section and the feed roll support section, according to claim 1 the ink ribbon feeding device, wherein the provided integrally with the supporting frame. The first support portion is a vertical plate-like member that supports the recording unit at a first height, and the second support portion has a second height that is higher than the first height. the ink ribbon feeder according to claim 1 or 2, wherein it is a vertical plate-shaped member which supports the. The first support portion is a plate-like member having a screw hole for fixing the recording unit with a screw at a first height, and the second support portion is the plate-like member and the screw hole. an ink ribbon feeder according to claim 1 or 2, characterized in that it is constituted by a washer member thickness that is disposed between the screw hole of the recording unit.

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