JP4174641B2 - Ink sheet cartridge - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of an ink sheet cartridge including a replaceable wide ink sheet for use in an image forming apparatus such as a printer or a facsimile apparatus.
[0002]
[Prior art]
When printing on recording paper such as plain paper using a thermal printer, an ink ribbon cartridge is usually used because of easy replacement and easy handling. When the thermal printer is a line printer, a wide ink sheet is used. A conventional ink sheet cartridge of this type is, for example, as shown in Japanese Utility Model Laid-Open No. 6-81749 and Japanese Patent Application Laid-Open No. 10-193732, and the like. The spool and the take-up side spool can each be rotatably supported and are configured to be detachable.
[0003]
[Problems to be solved by the invention]
However, if the user makes a mistake in attaching the supply-side spool and the take-up-side spool to the cartridge main body or the right and left positions of the spools, the front and back surfaces of the new ink sheet will not be properly set with respect to the cartridge main body. Therefore, there is a problem that the printing operation becomes impossible.
[0004]
In general, one side of the supply-side spool and the take-up-side spool is provided with a gear portion for transmitting power from the main body side of the image forming apparatus to rotate each spool. In this case, if the mounting side of the gear portion is mistaken, the ink sheet cannot be supplied. Therefore, it is necessary to dispose the gear portion on the correct side surface of the cartridge main body and set it in the main body of the apparatus in the correct orientation.
[0005]
Therefore, there is a problem that a normal user is confused or troublesome to attach the supply spool and the take-up spool to the correct position and orientation.
[0006]
The present invention has been proposed in view of the above-described conventional problems, and it is extremely easy to attach the supply side spool and the take-up side spool for replacing the ink sheet, thereby improving the replacement workability. An object of the present invention is to provide an ink sheet cartridge that can be used.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, an ink sheet cartridge according to a first aspect of the present invention is mountable on both ends of an ink sheet supply side core tube and on both ends of the ink sheet take-up side core tube. In an ink sheet cartridge in which a winding side spool is rotatably mounted on both left and right side plates of the cartridge body, either one of the winding side spools is formed in the side plate of the cartridge body. The shaft hole is provided with a first rotating member with a transmission gear inserted from the outside of the side plate, and a shaft portion with a flange connected to the first rotating member from the inside of the side plate, The rotating member includes an inner cylinder portion provided at an inner diameter portion of the transmission gear, and a tip engagement member provided at a tip of an elastic body extending from one side notch portion of the inner cylinder portion along the axial direction of the inner cylinder portion. Claws , Provided radially outwardly of the inner cylinder part, a plurality of base to be inserted into the shaft hole formed in the side plate and projecting from the side opposite to the shaft portion from its respective base of the shaft portion A positioning protrusion extending in the radial direction and a fitting hole provided between the plurality of base portions are provided, and the elastic body and the tip locking claw in the first rotating member are inserted through the shaft portion. A base portion and a guide groove are provided, and the flange includes a positioning hole into which the positioning protrusion is fitted, an engagement body that fits into the fitting hole and extends in a direction opposite to the guide groove, and the side plate. The elastic body of the first rotating member is inserted into the guide groove of the shaft portion through the shaft hole formed in the shaft, and the positioning protrusions on the first rotating member are fitted into the positioning holes on the flange, respectively. With the first rotating member That in which the distal end claw portion is engaged Mari engagement fitted to the fitting hole in the engaging body of the shaft portion.
[0008]
According to a second aspect of the present invention, in the ink sheet cartridge according to the first aspect, the first rotating member is provided with the positioning protrusion for each base, and the positioning hole in the flange is the positioning hole. A plurality of positioning projections are provided corresponding to the projections, and one of the plurality of positioning projections and the plurality of positioning holes has a different shape from the other pair .
[0009]
According to a third aspect of the present invention, in the ink sheet cartridge according to the first or second aspect, the intermediate coupling body inserted between the shaft portion and one end of the winding-side core tube includes A plurality of cam portions that are divided via gaps in a radial direction to be in a fitted / non-fitted state with a tip locking claw in the elastic body according to the rotation direction of the first rotating member are provided, and the first rotation When the member rotates in the winding direction, the tip locking claw engages with the gap between the two adjacent cam portions and rotates integrally, and the first rotating member rotates in the direction opposite to the winding direction. When the tip locking claw is pressed by the flat inner diameter portion of the cam portion, the tip locking claw can be rotated without being fitted into the gap. It is.
[0010]
[0011]
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Next, a preferred embodiment of the present invention will be specifically described with reference to the drawings.
[0013]
1 is a side cross-sectional view of the facsimile apparatus 1 with the ink sheet cartridge 20 mounted thereon, FIG. 2 is an enlarged side cross-sectional view of the main part of the set portion of the ink sheet cartridge 20, FIG. 3 is a plan view of the ink sheet cartridge 20, and FIG. FIG. 8 is an exploded perspective view of parts of the ink sheet cartridge, and FIG. 9 is a perspective view of a spool connecting portion on the take-up side.
[0014]
First, the structure of the facsimile machine 1 as an image forming apparatus of the present invention will be outlined. The facsimile apparatus 1 according to the present embodiment reads an image or the like from the document 8 and transmits the image data as facsimile data to another facsimile apparatus via a communication line such as a telephone line and a communication line such as a telephone line. In addition to the function as a normal facsimile machine that receives facsimile data transmitted from other facsimile machines via the printer and forms the image on the recording paper 4, it can be connected to a printer such as a printer cable or infrared from a personal computer or word processor. The printer functions as a printer that receives print data transmitted through the printer and forms an image in accordance with the received data.
[0015]
A handset (not shown) is disposed on one side of the main body case 2 of the facsimile apparatus 1. The upper cover body 6 that covers the upper surface of the main body case 2 having an open upper surface is pivotally attached to the upper rear end of the main body case 2 so as to be vertically rotatable around a rotation fulcrum 6a at the rear end. An operation panel 3 having a key switch 3a, a liquid crystal display device 3b, and the like is provided on the upper front side of the upper cover body 6. The operation panel 3 is also configured so that the front side can be opened and rotated in order to remove the document 8 when the document 8 is poorly fed. In addition, a paper feed base 5 for stacking and placing the recording paper 4 in an inclined downward state is provided on the rear upper surface of the main body case 2 so as to be rotatable with respect to the rear part of the upper cover body 6. The document table 7 is detachably attached to the middle of the upper surface of the main body case 2.
[0016]
In the main body case 2, a feed roller pair 9 for conveying the document 8 from the document table 7, a contact image scanner unit (CIS) 10, and an upper side of the reading unit are located below the operation panel 3. A document pressing body 11 and a paper discharge roller pair 12 are disposed.
[0017]
In the main body case 2 below the paper feed table 5, a paper feed roller 15 for conveying the recording paper 4 from the paper feed table 5 one by one and the upper peripheral surface thereof are urged by a spring. A paper feed unit 14 including a pad 16 and the like is provided.
[0018]
Below the paper feeding unit 14, a roller-shaped platen 17 as a printing unit, a thermal head 22 on a printing table 19 urged by a spring 18 toward the lower surface of the platen 17, and the printing table 19 A storage portion 13 for the ink sheet cartridge 20 is disposed so as to straddle in the front-rear direction (see FIG. 1).
[0019]
In the ink sheet cartridge 20 in the storage unit 13, the supply side sheet spool 25 of the ink sheet 21 is disposed on the rear side of the main body case 2, the take-up side sheet spool 26 is on the front side of the main body case 2, and the supply side sheet It is arranged in a forwardly inclined shape (hip-up shape) so that the spool 25 side is at a high position and the take-up side sheet spool 26 side is at a low position. Accordingly, the lower portion of the storage portion 13 is located on the rear side of the lower surface of the main body case 2, and, in combination with the forward inclined arrangement of the ink sheet cartridge 20, a large space is provided on the rear surface of the lower surface of the main body case 2. It is formed. Therefore, a control board 29 for performing operations of the facsimile machine 1 and the like is disposed in this space, that is, below the storage unit 13.
[0020]
The ink sheet 21 wound from the supply side sheet spool 25 to the front winding side sheet spool 26 passes through the top surface of the thermal head 22 and the tension member 23 made of a spring plate, and the lower circumference of the winding side sheet spool 26. It reaches the surface side. At this time, the ink surface of the ink sheet 21 is on the upper surface. The recording paper 4 that overlaps the upper surface (ink surface) of the ink sheet 21 is printed by the printing unit where the platen 17 and the thermal head 22 are superposed, and then is placed on the upper side of the ink sheet cartridge 20 on the take-up side sheet spool 26 side. The sheet passes through the upper surface of the formed partition plate 24 having the function of the conveyance chute, and is discharged to the front of the main body case 2 via the pair of discharge rollers 28. An upper chute portion 27 of a plurality of rib-like conveyance chutes protruding downward is arranged on the lower surface of the upper cover body 6 so as to extend from the conveyance upstream side to the downstream side with the platen 17 interposed therebetween, and the ink sheet The recording paper 4 can pass between the partition plate 24 in the cartridge 20.
[0021]
On the other hand, the ink sheet 21 is bent downward at the top surface of the tension member 23, passes through the lower surface side of the partition plate 24, and is wound up on the lower peripheral side of the winding side sheet spool 26. .
[0022]
Next, the configuration of the ink sheet cartridge 20 according to the present invention will be described in detail with reference to FIGS.
[0023]
The ink sheet cartridge 20 includes a cartridge main body 30, an ink sheet 21, a pair of left and right supply side spools 36 and 37 as a supply side sheet spool 25, and a pair of left and right winding side spools as a winding side sheet spool 26. 38, 39.
[0024]
The spools 36, 37, 39 are flanged shaft portions that are detachably fitted to both ends of the core tubes 40, 41 for winding the ink sheet 21, for example, for injection molding of a synthetic resin material. The single spool 38 is formed by combining a plurality of parts.
[0025]
Next, the configuration of the cartridge body 30 as the cartridge body will be described with reference to FIGS. The cartridge body 30 includes a pair of left and right side plates 31a and 31b extending from the sheet supply side to the take-up side so as to surround the left and right outer sides of the ink sheet 21, and a winding on the supply side of the ink sheet 21 around the pair of side plates 31a and 31b. The upper cover piece 32 which is connected to cover the upper side of the left and right sides, and a partition plate 24 which covers a pair of side plates 31a and 31b and covers the upper part on the winding side of the ink sheet 21, are combined. It was produced integrally by injection molding with resin material. Accordingly, a portion surrounded by the left and right longitudinal supply-side upper cover piece 32, the winding-side partition plate 24, and the left and right side plate connecting pieces 31a and 31b becomes a window hole portion from which the ink sheet 21 is exposed. The roller-shaped platen 17 faces from the upper side of the printing section, and the printing table 19, the thermal head 22 and the tension body 23 face from the lower side of the window hole (see FIGS. 1 and 2). Further, hook portions 35, 35 such as hooks are provided so as to project upward from the left and right end portions of the partition plate 24 or the pair of left and right side plates 31a, 31b.
[0026]
The side plates 31a and 31b have support shafts in the supply-side right spool 37 and the take-up right spool 39, and the support shaft portions in the supply-side left spool 36, except for the location of the take-up left spool 38. A shaft support groove 33 of an open end type in which each is loosely fitted is formed (see FIGS. 6 and 8). The outer shaft 44 (support shaft portion) is connected to the shaft support groove portion 33 and is formed in the side plates 31a and 31b so as to extend radially outward. When pushing upward in a substantially crossed state with respect to the support groove portion 33, the width dimension between the lower open groove edges of each shaft support groove portion 33 elastically expands, but in the free state, each outer shaft 44 (support shaft portion). Is configured so as not to drop off with respect to each shaft support groove 33.
[0027]
The ink sheet 21 is formed by forming an ink layer on one side of a wide resin film, and is wound around a pair of paper-made cylindrical core tubes 40 and 41 as shown in FIG. . The recording paper 4 faces the ink layer of the ink sheet 21 and is sandwiched between the platen 17 and the recording surface of the thermal head 22 which is a line printer, and the heating resistor of the thermal head 22 is energized according to the image data. Thus, an image is formed on the recording paper 4 line by line.
[0028]
The supply-side right spool 37 and the winding-side right spool 39 that are fitted to the right ends (right side as viewed from the discharge side of the recording paper 4) of the supply-side core tube 40 and the winding-side core tube 41 are shown in FIG. As shown in the figure, the inner cylinder part 42 fitted into the inner diameter of the right end part of the core tube 40 (41), the large-diameter flange part 43, and a cartridge body 30 to be described later are rotatably arranged. And a small-diameter cylindrical outer shaft 44 as a support shaft portion.
[0029]
A supply-side left spool 36 that fits to the left end of the supply-side core tube 40 fits into the inner diameter of the left end portion of the core tube 40 and has an inner cylinder portion 42 with an engaging claw 42a that engages with a notch groove; A large-diameter flange portion 43, a support shaft portion (not shown) provided outside the flange portion 43 and rotatably arranged with respect to a cartridge body 30 described later, and a gear portion 45 provided outside the support shaft portion (See FIG. 8).
[0030]
On the other hand, the winding-side left spool 38 fitted to the left end of the winding-side core tube 41 is mounted in the shaft hole 50 of the one side plate 31a of the cartridge body 30 so as not to be detached, and the one side plate 31a. The first rotating member 46 with the transmission gear 47 disposed on the outer side, and the shaft portion 48 with the flange 48a connected to the first rotating member 46 from the inside of the one side plate 31a. And while the intermediate coupling body 56 is detachably fitted to the flanged shaft part 48, the intermediate coupling body 56 is fitted to the inner diameter portion of the left end of the core tube 41 on the winding side. Each is formed by injection molding of a synthetic resin material.
[0031]
10 (a), 10 (b), 10 (c), and 10 (d) show the first rotating member 46. The inner cylindrical portion 46a is provided along the axis on the inner diameter portion of the transmission gear 47. FIG. A rod-shaped elastic body 51 extending along the axial direction is integrally formed in one cutout portion 46c of the inner cylinder portion 46a. On the free end side of the elastic body 51, a tip locking claw 51a is integrally formed radially outward. On the radially outer side of the inner cylindrical portion 46a, a fan-shaped base portion 46b divided into three parts is provided along the circumference. Further, a substantially rectangular fitting hole 53 into which the front end claw portions 52a of the three engaging bodies 52 in the shaft portion 48 with the flange 48a are fitted is formed between the three divided base portions 46b. A step portion 53a as an engaging portion is formed on the outer peripheral side of each fitting hole 53. In addition, a positioning projection 54 that protrudes on a side surface facing the shaft portion 48 and extends in the radial direction is integrally formed on the base portion 46b divided in three.
[0032]
11 (a), 11 (b) and 11 (c) show the configuration of the shaft portion 48 with the flange 48a, and the disk-like flange 48a protrudes radially outward from the cylindrical base portion 48b. At one end of the base portion 48b, a guide portion 48c having an arc shape with a slightly smaller radius extends in the axial direction, and the elastic body 51 and its distal end locking claw 51a axially connect the inner diameter portions of the base portion 48a and the guide portion 48c. Can penetrate in the direction. Three engaging bodies 52 project from the midway portion of the flange 48a in the direction opposite to the base portion 48b. Further, a positioning hole 55 into which each positioning projection 54 of the first rotating member 46 is fitted is formed at the base portion of the base portion 48b and the flange 48a.
[0033]
With the above configuration, the elastic body of the first rotating member 46 with respect to the shaft hole 50 as shown in FIG. 9 from the outside of the left side plate 31a shown in FIG. 51 is inserted, the flange 48a of the shaft portion 48 is approached from the inside of the side plate 31a, and the three engaging bodies 52 are inserted into the shaft hole 50. And each front-end | tip claw part 52a of each engagement body 52 is engage | inserted to each fitting hole 53 by the side of the internal diameter of the transmission gear 47 in the said 1st rotation member 46. As shown in FIG. As a result, each tip claw portion 52a engages with the stepped portion 53a on the outer peripheral side of each fitting hole 53, and is integrated as the winding side left spool 38, and cannot be removed from the shaft hole 50 and thus the cartridge body 30. It is. In this case, the rod-like elastic body 51 is phase-matched with the guide groove 48d of the notch guide portion 48c in the shaft portion 48, so that the positioning protrusions 54 in the first rotating member 46 and the positioning holes in the shaft portion 4 are aligned. The shape with 55 is made different for each phase. Further, in an integrated state as the winding-side left spool 38, the outer periphery of the joint portion between the base portion 48b of the shaft portion 48 and the base portion 46b divided into three in the first rotating member 46 is cylindrical, and the shaft hole 50 It becomes a positioning part of the rotation center axis line of transmission gear 47 and winding side spool 38 with respect to (refer to Drawing 14 (a) and Drawing 14 (b)).
[0034]
Furthermore, in this embodiment, the cylindrical intermediate | middle coupling body 56 inserted between the edge part of the core tube 41 by the side of winding, and the said axial part 48 is provided. 12 (a), 12 (b) and 12 (c), and FIGS. 13 (a) and 13 (b) show the intermediate coupling body 56, and an inner diameter portion on the proximal end side of the cylindrical base portion 57. 57a is formed with the same diameter D1 so that the base portion 48b of the shaft portion 48 fits tightly and rotatably, and the distal end side of the base portion 57 is integrally provided with a cam portion 58 that is divided into three in the circumferential direction. The guide portion 48c of the shaft portion 48 is rotatably fitted on the inner diameter side surrounded by the three cam portions 58.
[0035]
When the intermediate coupling body 56 is rotated relative to the base portion 48 b of the shaft portion 48, the distal end locking claw 51 a is a flat inner diameter portion of the cam portion 58 against the elasticity of the elastic body 51. It is pressed and can rotate only in one direction (the direction opposite to the winding direction (when the intermediate coupling body 56 is rotated clockwise in FIG. 15)), and the winding direction (the intermediate coupling body 56 is counterclockwise in FIG. 15). When rotating in the direction), the distal end locking claw 51a urged radially outward by the elastic force of the elastic body 51 is located in the radial gap between the two adjacent cam portions 58, 58. It is configured so that it can be fitted and rotated integrally, and a two-shaped stop projection 61 projecting from the outer peripheral side of the base 57 of the intermediate coupling body 56 is the end of the core tube 41. (See FIG. 12B), so that the image shape is formed. It can be reliably transmitted to the take-up spool 26 the torque transmitted from the main body of the apparatus to the transmission gear 47.
[0036]
Further, the outermost diameter portion 57b on the outer peripheral side of the base portion 57 of the intermediate coupling body 56 has the same diameter as the outer diameter of the core tube 41, and a pair of elastic claws 59, 59 are provided from the outermost diameter portion 57b. It protrudes so as to extend along the axis. Accordingly, when the base portion 57 of the intermediate coupling body 56 is inserted from the end portion of the core tube 41 on the winding side, each elastic claw 59 is cut out at the end portion of the core tube 41 and a pair of non-rotating plan views. It latches in the L-shaped stop groove 60 (only one is shown by FIG.12 (b)). As a result, a take-up spool made by another company that does not have the stop groove 60 in the core tube 41 cannot be mounted on the ink sheet cartridge 20 of the present invention, and erroneously applied to an image forming apparatus such as a facsimile machine manufactured by the present applicant. Misuse that the ink sheets 21 of different quality are mounted is eliminated, and troubles such as deterioration of printing quality and printing defects can be prevented by not using the regular ink sheet 21.
[0037]
With the above-described configuration, the winding-side left spool 38 is configured in advance by mounting the first rotating member 46 and the shaft portion 48 with the flange 48a in a predetermined shaft hole 50 of the cartridge body 30 so as not to be detached. On the other hand, the intermediate coupling body 56 is attached to the end portion (right end) of the core tube 41 on the winding side so as not to be detached.
[0038]
Next, a mode in which a replacement ink sheet set is mounted on the cartridge body 30 will be described. The replacement ink sheet set is a set of a new ink sheet 21 wound around the supply-side core tube 40 and a take-up side core tube 41. If desired, the replacement ink sheet set is preliminarily attached to a predetermined end of the core tube 41. The intermediate coupling body 56 may be attached. In these cases, the width dimension of the ink sheet 21 is preferably the dimension from the outer end portion of the outermost diameter portion 57 b of the intermediate coupling body 56 connected to one end of the core tube 41 to the other end of the core tube 41. . Further, the end of the new ink sheet 21 is attached to the outer periphery of the core tube 41 with an adhesive tape or the like. A winding-side right spool 39 is inserted and attached to the right end of the core tube 41. As shown in FIG. 8, the supply-side left spool 36 and the supply-side right spool 37 are respectively inserted and attached to both ends of the supply-side core tube 40. Next, when the base portion 48b of the shaft portion 48 is inserted into the inner diameter portion 57a of the intermediate coupling body 56 and the intermediate coupling body 56 is relatively rotated, the distal end locking claw 51a resists the elasticity of the elastic body 51. Is pressed by the flat inner diameter portion of the cam portion 58, and can rotate only in one direction (the direction opposite to the winding (when the intermediate coupling body 56 is rotated clockwise in FIG. 15)) (see FIG. 15). As described above, one of the four spools 36, 37, 38, 39 (the winding-side left spool 38) is attached to the cartridge body 30 so as not to be detached. In the embodiment, it becomes clear that the arrangement side of the transmission gear 47 is either the left or right side of the cartridge main body 30, and when the user replaces the ink sheet 21 with a new one, both ends of the core tubes 40 and 41 are attached to each spool. Error is reduced, such as the direction, but they can quickly and easily replace the ink sheet 21.
[0039]
In the above state, the take-up right spool 39, the supply left spool 36, and the supply right spool 37 are fitted into the shaft support grooves 33, 33, 33 in the cartridge main body 30, respectively, so as not to loosen the ink sheet 21. The core tube 41 on the winding side is rotated.
[0040]
When the ink sheet cartridge 20 having the above configuration is set in the storage unit 13 of the facsimile apparatus 1, the left and right side plates 31a and 31b of the cartridge body 30 as the cartridge body are supported in a predetermined posture. The inner diameter portions of the outer cylinders 44 in the right spool 39 and the supply-side right spool 37 are fitted on a shaft portion (not shown) protruding from the main body frame (not shown), while the supply-side left spool 36 and the winding are wound. The gear portion 45 and the transmission gear 47 in the take-up left spool 38 are respectively engaged with a power transmission gear (not shown), and the inner diameter portion of the outer shaft in the supply-side left spool 36 and the take-up left spool 38 is It fits on a shaft portion (not shown) that is elastically projected in the axial direction from the main body frame side. As a result, the supply side sheet spool 25 and the take-up side sheet spool 26 can rotate smoothly.
[0041]
The control board 29 is actuated by the output of a print command on the operation panel 3 or a print command command from an external computer (not shown) or reception of facsimile data from another facsimile machine, and printing (recording) work is started. Then, first, the paper feed roller 15 rotates to start paper feeding. When the leading edge of the recording paper 4 is conveyed a predetermined distance after detecting a paper sensor (not shown) and approaches the platen 17, power is transmitted to the gear unit 45 and the transmission gear 47 in the platen 17 and the ink sheet cartridge 20, and the ink sheet 21 is moved. The conveyance and the feeding of the recording paper 4 are started, and printing is performed by the thermal head 22 which is a printing unit.
[0042]
Immediately after printing with the ink sheet 21 and the recording paper 4 sandwiched between the platen 17 and the thermal head 22, the ink on the ink sheet 21 is printed by the heat generated by the heating resistor of the thermal head 22 (characters). ) And is reflected on the recording paper 4, and then the ink is cooled and the ink sheet 21 continues to adhere to the surface of the recording paper 4. At the position of the top surface 23a of the tension member 23, the ink sheet 21 is largely bent downward to be wound around the lower peripheral side of the winding side sheet spool 26, as shown in FIG. The sticking caused by the ink is released. On the other hand, the recording paper 4 whose lower surface serves as the printing surface is placed on the upper surface of the partition plate 24 and conveyed, so that the conveyance path between the recording paper 4 and the ink sheet 21 can be reliably separated. In addition, by bending downward at the front end of the partition plate 24 (the side close to the top surface 23a of the tension body 23), the front end (downstream side of the recording paper 4) in the free state is scooped up so that the recording paper 4 is It can be prevented from moving downward.
[0043]
As shown in FIGS. 3 to 5, if a large number of protrusions 24 a are formed on the upper surface of the partition plate 24 in the longitudinal direction along the conveying direction, the recording paper 4 with the printing surface facing downward is provided. When the ink passes, the printing surface is not widened, and the contamination of the recording paper 4 due to ink adhesion can be reduced.
[0044]
The partition plate 24 serves as a lower chute for the chute portion that serves as a guide portion for the conveyance path of the recording paper 4, and is between a rib-shaped upper chute portion 27 that extends across the platen 17 and the upper surface of the partition plate 24. Thus, the recording paper 4 can be reliably guided. Further, when a paper jam (paper jam) occurs, the gap between the partition plate 24 and the upper chute 27 in the ink sheet cartridge 20 arranged on the main body case 2 side simply by opening the upper cover 6 upward is increased. Since it can be opened, the paper jam of the recording paper 4 can be removed very easily.
[0045]
In the above-described embodiment, the present invention is applied to a facsimile machine. However, the present invention is not limited to this, and can be used in various image forming apparatuses such as a printer, a copying machine, or a device having a plurality of functions thereof.
[0046]
【The invention's effect】
As described above, the ink sheet cartridge according to the first aspect of the invention includes the supply-side spool that can be attached to both ends of the ink sheet supply-side core tube, and the take-up that can be attached to both ends of the ink sheet take-up side core tube. In the ink sheet cartridge in which the side spool is rotatably attached to the left and right side plates of the cartridge main body, either one of the take-up side spools has a shaft hole formed in the side plate of the cartridge main body. A first rotating member with a transmission gear inserted from the outside of the side plate, and a shaft portion with a flange connected to the first rotating member from the inside of the side plate, the first rotating member Includes an inner cylinder part provided at an inner diameter part of the transmission gear, and a tip locking claw provided at the tip of an elastic body extending from one side notch part of the inner cylinder part along the axial direction of the inner cylinder part. And before Provided radially outwardly of the inner cylindrical portion, said plurality of base to be inserted into drilled axial hole in the side plate and projecting from the side opposite to the shaft portion from its respective base portion radially of the shaft portion A positioning projection extending between the plurality of base portions and a fitting hole provided between the plurality of base portions, and the shaft portion includes a base portion through which the elastic body and the tip locking claw in the first rotating member are inserted, and A guide groove is provided, and the flange is provided with a positioning hole into which the positioning protrusion is fitted, and an engaging body that is fitted into the fitting hole and extends in a direction opposite to the guide groove, and is further provided in the side plate. The elastic body of the first rotating member is inserted into the guide groove of the shaft portion through the provided shaft hole, and the positioning protrusions on the first rotating member are fitted in the positioning holes on the flange, respectively. In the state, the fitting in the first rotating member In which the distal end claw portion of the engaging body of the shaft portion is fitted Mari engaged in the hole.
Accordingly, since one flanged shaft portion and the first rotating member are mounted so as not to be detached from the side plate, when the user replaces (replaces) the ink sheet with a new ink sheet, There are fewer errors such as the direction of attachment with the flanged shaft, and the ink sheet can be replaced (replaced) quickly and easily.
[0047]
[0048]
Also, when the flanged shaft portion and the first rotating member are engaged, the flange having a larger diameter than the shaft hole and the transmission gear are positioned inside and outside the side plate, so that it is extremely easy to prevent the shaft from coming off. The effect of becoming.
[0049]
Further, the flanged shaft portion is disposed on the inner surface side of the side plate, while the first rotating member with a transmission gear is disposed on the outer surface side of the side plate, and the flanged portion is disposed through a shaft hole drilled in the side plate. Since the engaging body protruding from the shaft portion is engaged with the first rotating member so as not to be detached, the engaging body protruding from the flanged shaft portion is inserted into the shaft hole and is engaged with the first rotating member. As a result, the engagement operation can be easily performed.
[0050]
[0051]
[Brief description of the drawings]
FIG. 1 is a side sectional view of a facsimile apparatus.
FIG. 2 is a side view illustrating paths of recording paper and an ink sheet in the vicinity of a printing unit.
FIG. 3 is a plan view of the ink sheet cartridge.
FIG. 4 is a perspective view of the ink sheet cartridge as viewed from the front left side.
FIG. 5 is a perspective view of the ink sheet cartridge as viewed from the front right side.
FIG. 6 is a right side view of the ink sheet cartridge.
FIG. 7 is a left side view of the ink sheet cartridge.
FIG. 8 is an exploded perspective view of the ink sheet cartridge with its components turned upside down.
FIG. 9 is an exploded perspective view of a first rotating member 46, a flanged shaft portion 48, an intermediate coupling body, and the like.
10A is a front view of the first rotating member 46, FIG. 10B is a cross-sectional view taken along line Xb-Xb in FIG. 10A, and FIG. 10C is a left side view of FIG. FIG. 10D is a right side view of FIG.
11A is a front view of the flanged shaft portion 48, and FIG. 11B is a cross-sectional view taken along line XIb − of FIG.
Sectional view taken along line XIb, (c) is a right side view of FIG. 11 (a).
12A is a cross-sectional view of the intermediate coupling body 56, FIG. 12B is a front view of the end portions of the intermediate coupling body 56 and the core tube 41, and FIG. 12C is a bottom view of the intermediate coupling body 56;
13A is a perspective view of the intermediate coupling body 56, and FIG. 13B is a cross-sectional view taken along line XIIIb-XIIIb in FIG. 13A.
14A is an enlarged cross-sectional view showing a connection state between the first rotating member 46 and the flanged shaft portion 48, and FIG. 14B is an enlarged cross-sectional view showing a connection state with the intermediate connection body 56;
15 is a cross-sectional view taken along line XV-XV in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 20 Ink sheet cartridge 21 Ink sheet 24 Partition plate 25 Supply side sheet spool 26 Winding side sheet spool 30 Cartridge main body 31a, 31b Side plate 32 Upper cover piece 36-39 Spool 40, 41 Core tube 42 Inner cylinder part 43, 48a Flange part 45 Gear portion 46 First rotating member 47 Transmission gear 48 Shaft portion 48b Base portion 50 Shaft hole 51 Elastic body 51a Locking claw 52 Engaging body 52a Tip claw portion 53 Fitting hole 53a Step portion 54 Positioning projection 55 Positioning hole 56 Intermediate coupling body

Claims (3)

A supply-side spool that can be attached to both ends of the ink sheet supply-side core tube and a take-up spool that can be attached to both ends of the ink sheet take-up side core tube are rotatably attached to the left and right side plates of the cartridge body. In the ink sheet cartridge
One of the winding side spools has a first rotating member with a transmission gear inserted into an axial hole formed in the side plate of the cartridge body from the outside of the side plate, and the first rotating member And a shaft portion with a flange connected from the inside of the side plate,
The first rotating member is provided at an inner cylinder part provided at an inner diameter part of the transmission gear, and at an end of an elastic body extending from one side notch part of the inner cylinder part along the axial direction of the inner cylinder part. A front end locking claw, a plurality of base portions provided on the outer side of the radius of the inner cylinder portion and inserted into shaft holes formed in the side plates, and protruding from the base portions to side surfaces facing the shaft portion. Positioning protrusions extending in the radial direction of the shaft portion, and fitting holes provided between the plurality of base portions,
The shaft portion is provided with a base portion and a guide groove through which the elastic body in the first rotating member and the tip locking claw are inserted ,
The flange includes a positioning hole into which the positioning protrusion fits, and an engaging body that fits into the fitting hole and extends in a direction opposite to the guide groove.
Further, the elastic body of the first rotating member is inserted into the guide groove of the shaft portion through the shaft hole drilled in the side plate, and the positioning protrusion on the first rotating member is positioned on the flange. An ink sheet cartridge, wherein a front end claw portion of the engaging member of the shaft portion is fitted and engaged with a fitting hole in the first rotating member in a state of being fitted in the hole. The first rotating member is provided with the positioning protrusion for each base,
A plurality of the positioning holes in the flange are provided corresponding to the positioning protrusions,
2. The ink sheet cartridge according to claim 1, wherein one of the plurality of positioning protrusions and the plurality of positioning holes has a different shape from the other pair. . The intermediate coupling body inserted between the shaft portion and one end of the winding-side core tube is fitted / non-fitted with a tip locking claw in the elastic body according to the rotation direction of the first rotating member. A plurality of cam portions divided via gaps in the radial direction to be in a combined state are provided,
When the first rotating member rotates in the winding direction, the tip locking claw fits into the gap between the two adjacent cam portions and rotates integrally,
When the first rotating member rotates in the direction opposite to the winding direction, the tip locking claw is pressed by the flat inner diameter portion of the cam portion, and the tip locking claw does not fit into the gap. The ink sheet cartridge according to claim 1, wherein the ink sheet cartridge is configured to be rotatable.

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