JP2007137652A - Medium stacker, liquid jet device and recording device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a medium stacker, a liquid jet device provided with the medium stacker and a recording device capable of preventing damage even if external force is applied when it is positioned at an oblique upper position. <P>SOLUTION: A guide pin 24 and a guide groove 26 for guiding oblique and vertical slide are provided on the obliquely and vertically slidable medium stacker 152 for loading the discharged medium. Further, a portion of the guide groove near a position 26b of top dead center is formed as an inclination part 26g having a larger angle θ than a friction angle with the guide pin. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a medium stacker that can be accommodated in a liquid ejecting apparatus main body and loads ejected ejected media, and a liquid ejecting apparatus and a recording apparatus that include the medium stacker.

  In general, in an ink jet printer that is one of the recording devices, a new sheet is supported by a paper support disposed on the back side of the printer body, and one end is lifted by a hopper, and the uppermost sheet is fed. The paper is pulled out and fed by a roller. Then, the fed paper is transported by a transport roller for recording, and the recorded paper is transported by a paper discharge roller and discharged onto a stacker disposed on the front side of the printer main body. It has become. The stacker is configured to be slidable with respect to the printer main body so that it can be stored and withdrawn. When the printer is not used, the stacker is stored along the bottom surface of the printer main body. When the printer is used, the stacker protrudes obliquely upward from the printer main body. (See Patent Document 1).

JP 2004-75264 A

  When the stacker is pulled out, the rear end side is supported by the printer main body, and the front end side is in a cantilever state protruding obliquely upward from the printer main body. For this reason, when some external force is applied to the upper surface of the stacker, a moment is generated with the rear end side of the stacker as a fulcrum, and the stacker may be damaged.

  The present invention has been made in view of the various problems as described above, and an object of the present invention is to provide a medium stacker capable of preventing damage even when an external force is applied when it is positioned obliquely above, and a medium stacker for the medium stacker. The present invention provides a liquid ejecting apparatus and a recording apparatus including

  In order to achieve the above object, the medium stacker of the present invention is a medium stacker that is slidable obliquely up and down on which a medium to be ejected is stacked, and has a guide pin and a guide groove for guiding the oblique up and down slide, The guide groove portion in the vicinity of the point position is formed as an inclined portion having an angle larger than the friction angle with the guide pin. As a result, if an external force is applied when the medium stacker is located obliquely upward, the guide pin slides down the inclined portion, that is, the medium stacker moves obliquely downward and the external force can be released. Can be prevented.

  Further, the guide pin and the guide groove are provided on both sides of the stacker, respectively, and two sets of the guide pin and the guide groove on each side portion are arranged so as to be shifted in the drawing / storage direction and the vertical direction. The inclined portion is formed in the guide groove on the direction side. Accordingly, in the case where two guide pins and a guide groove that are arranged so as to be shifted in the vertical direction with respect to the drawing / storing direction are provided, if an external force is applied when the medium stacker is positioned obliquely upward, the drawing direction The guide pin on the storage direction side may be damaged using the guide pin on the side as the rotation fulcrum, but the guide pin on the pull-out direction side can slide down the inclined portion of the guide groove on the pull-out direction side to release external force. Breakage of the guide pin on the storage direction side can be prevented.

  In order to achieve the above object, the liquid ejecting apparatus of the present invention is a liquid ejecting apparatus that ejects a liquid onto a medium to be ejected, and includes the above-described medium stackers. The recording apparatus according to the present invention is a recording apparatus for recording on a recording medium, and includes the liquid ejecting apparatus. Thereby, it is possible to provide a liquid ejecting apparatus or a recording apparatus that exhibits the above-described effects.

  Embodiments of the present invention will be described with reference to the drawings. The embodiments described below do not limit the invention according to the claims, and all the combinations of features described in the embodiments are not necessarily essential to the solution means of the invention. Absent.

  FIGS. 1 and 2 are perspective views of an overall appearance configuration of an ink jet printer, which is one of recording apparatuses according to an embodiment of the present invention, seen obliquely from the front and rear, and FIG. FIG. 4 is a perspective view showing the outline, and FIG. 4 is a sectional side view showing the outline of the internal configuration. This ink jet printer 100 is, for example, a single sheet of paper of a size such as L size / 2L size, postcard, JIS standard A4 size, A3 size nobi, A2 size (hereinafter simply referred to as paper (medium, ejected medium, recording medium). )) Has a function capable of recording with ink (liquid).

  As shown in FIGS. 1 and 2, the inkjet printer 100 is entirely covered with a substantially rectangular parallelepiped housing 101. An operation unit 110 is provided on the upper right front side of the housing 101 shown in FIG. 1, and a cartridge storage unit 120 is provided on the upper left front side of the housing 101 shown in FIG. Further, a first rear paper feed unit 130 is disposed on the rear side of the upper surface shown in FIG. 1, and a second rear paper feed unit 140 is disposed on the back side shown in FIG. A paper discharge unit 150 and a front paper supply unit 160 including characteristic portions of the present invention are arranged on the front side shown in FIG. 1, and a waste ink collection unit 170 is arranged on the right side of the front side shown in FIG. Has been. In addition, a paper transport unit 180 shown in FIGS. 3 and 4, a control unit 190 shown in FIGS. 2 and 4, and a recording unit 200 shown in FIGS. 3 and 4 are disposed inside the ink jet printer 100. Yes.

  As shown in FIGS. 1 and 2, a rectangular opening 102 is formed between the operation unit 110 and the cartridge storage unit 120 on the upper surface of the housing 101 and the first rear paper feeding unit 130. . The opening 102 is covered with a printer cover 210 having a substantially rectangular flat plate shape. The printer cover 210 is attached so as to be rotatable in the direction of the arrow a in the figure around a rotation axis at the rear end. The user can easily perform maintenance work of internal mechanisms such as the paper transport unit 180 and the recording unit 200 through the opening 102 by lifting the printer cover 210 and opening the opening 102.

  As shown in FIGS. 1 and 2, the operation unit 110 includes a substantially rectangular operation panel 111, and a liquid crystal panel 112 that displays an operation state and the like is disposed at a substantially central portion of the operation panel 111. Buttons 113 such as a power system for turning on / off the power, an operation system for operating a paper cueing or ink flushing, a processing system for performing image processing, etc. are disposed on both sides of the panel 112. . Since the user can operate the button 113 while checking the liquid crystal panel 112 for confirmation, an erroneous operation can be prevented.

  As shown in FIGS. 1 and 2, the cartridge storage unit 120 stores the ink cartridges 121 shown in FIGS. 3 and 4 that store inks of various colors for printing (9 colors in this example) in a detachable manner. ing. The cartridge storage unit 120 is covered with a cartridge cover 122 having an L-shaped cross section. The cartridge cover 122 is attached so as to be rotatable in the direction of the arrow b shown in the figure around the rotation shaft at the rear end. Since the user can easily replace the ink cartridge 121 by lifting the cartridge cover 122 and opening the cartridge storage unit 120, work efficiency can be improved.

  The first rear paper feeding unit 130 is for automatic paper feeding (ASF), and as shown in FIGS. 1 and 2, the first rear paper feeding unit 130 opens and closes a first paper feeding port 131 that opens upward in a rectangular shape, A four-stage first paper support 132 having a function of supporting one sheet or a plurality of sheets to be fed is provided. The first paper support 132 is attached so as to be rotatable in the direction of the arrow c shown in the drawing with the rotation axis at the rear end as a center. As the paper fed by the first rear paper feeding unit 130, relatively thin paper (for example, plain paper or photographic paper having a thickness of about 0.08 mm to 0.27 mm) is used.

  Before using the ink jet printer 100, the user completes the setting by placing a finger on the hole 132 a provided in the center of the front of the first paper support 132 and lifting the first paper support 132 and pulling out the multistage portion. Therefore, the storage and management necessary for the detachable paper support becomes unnecessary. Furthermore, since the first paper support 132 has a multistage structure, it is possible to reliably support papers to be fed of various sizes. In addition, after the ink jet printer 100 is used, the first paper support 132 can be closed by pushing the multi-stage portion into the first paper support 132 to close the first paper feed port 131, thus preventing dust from entering the printer body. In addition, the first paper support 132 can be stored compactly.

  The second rear paper feeding unit 140 is for manual paper feeding. As shown in FIG. 2, the second rear paper feeding unit 140 has a function of opening and closing a second paper feeding port 141 opened in a rectangular shape toward the rear, and a sheet to be fed. A two-stage second paper support 142 having a function of supporting sheets is provided. The second paper support 142 is attached so as to be rotatable in the direction of the arrow d shown in the figure around the rotation shaft at the lower end. The sheet fed by the second rear sheet feeding unit 140 is a sheet having a thickness that cannot be fed at the conveyance angle in the first rear sheet feeding unit 130 (for example, an image material sheet having a thickness of about 0.29 mm to 0.48 mm). Or special paper). Further, since the first rear paper feeding unit 130 is used for automatic paper feeding (ASF), the paper is picked up by the paper feeding roller 82. Therefore, when paper dust adheres to the paper feeding roller 82 and accumulates, the paper is fed. There is a possibility that the paper roller 82 slips and causes poor feeding. For this reason, paper that easily generates paper dust (for example, Velvet Fine Art Paper with a thickness of about 0.48 mm or Ultra Smooth Fine Art Paper with a thickness of about 0.46 mm) is manually fed by the second rear paper feeding unit 140. Need to make paper.

  Before the user uses the ink jet printer 100, the user completes the setting by placing a finger on the upper part of the second paper support 142 and pushing down the second paper support 142 to pull out the multistage portion. Storage and management necessary for support are not required. Furthermore, since the second paper support 142 has a multistage structure, it is possible to reliably support papers to be fed of various sizes. In addition, after the ink jet printer 100 is used, the second paper support 142 can be closed by pushing the multi-stage portion into the second paper support 142 to close the second paper feed port 141, thus preventing dust from entering the printer body. In addition, the second paper support 142 can be stored compactly.

  As shown in FIG. 1, the paper discharge unit 150 has a function of opening and closing a paper discharge port 151 that opens in a rectangular shape toward the front and a function of stacking one or a plurality of paper to be discharged. 3 is provided with a two-stage stacker (medium stacker) 152 of a first stacker 51 and a second stacker 52 shown in FIG. The first stacker 51 is attached to the tip end side of the second stacker 52 so as to be rotatable in the direction of the arrow e shown in the figure around the rotation axis. The second stacker 52 is attached so as to be able to be pulled out and stored in parallel with the upper and lower sides of the sheet discharge outlet 151 in an oblique manner. Details of the stacker 152, which is a characteristic part of the present invention, will be described later.

  The front paper feed unit 160 is for manual paper feed, and includes a paper feed tray 161 disposed above the stacker 152 at the paper discharge outlet 151 as shown in FIG. The paper feed tray 161 is provided so as to be horizontally movable with respect to the paper discharge outlet 151. As the sheet fed by the front sheet feeding unit 160, a relatively thick sheet (for example, matboard sheet having a thickness of about 1.2 mm) that cannot be folded during conveyance is used.

  Before using the ink jet printer 100, the user gently pushes the front end of the paper feed tray 161 to remove the stopper of the paper feed tray 161 and the paper feed tray 161 protrudes from the paper discharge outlet 151. Further, after using the ink jet printer 100, the paper feed tray 161 is put in the paper discharge outlet 151 by pushing the front end of the paper feed tray 161 lightly so that the stopper of the paper feed tray 161 is engaged. Therefore, the arrangement space efficiency of the paper feed tray 161 can be increased.

  As shown in FIGS. 1 to 3, the waste ink collection unit 170 accommodates a waste ink tank 171 that stores waste ink and the like so as to be removable. The waste ink tank 171 stores waste ink or the like that is discarded when the recording head 202 is cleaned or the ink cartridge is replaced. When the waste ink tank 171 is full of waste ink or the like, the user only has to pull out the waste ink tank 171 and insert a new waste ink tank 171. Therefore, the user can easily replace the waste ink tank 171. be able to.

  As shown in FIGS. 3 and 4, the paper transport unit 180 is disposed from the first rear paper feed unit 130 and the second rear paper feed unit 140 to the paper discharge unit 150, and the automatic paper feed mechanism 181. , A transport mechanism 182 and a paper discharge mechanism 183 are provided. As shown in FIG. 4, the automatic paper feed mechanism 181 includes a hopper 81 that lifts the paper supported by the first paper support 132, a paper feed roller 82 that picks up the paper lifted by the hopper 81, A retard roller 83 that separates the sheets fed by the sheet feeding roller 82 into only one sheet, and a paper return lever 84 that returns the remaining sheets separated by the retard roller 83 to the hopper 81 are provided.

  The hopper 81 is formed in a flat plate shape on which paper can be placed, and is disposed substantially in parallel with the rear wall. The lower end is located near the paper feed roller 82 and the upper end is located near the top of the rear wall. It is arranged to do. The hopper 81 is attached such that the other end of a compression spring (not shown) having one end attached to the rear wall is attached to the back surface on the lower end side, and the lower end side turns around the upper end side by expansion and contraction of the compression spring. It is installed.

  The paper feed roller 82 is formed in a D-shape with a part of the cross-section cut away, and is disposed in the vicinity of the lower end of the hopper 81. The paper feed roller 82 intermittently rotates and frictionally feeds the paper lifted by the hopper 81. It is supposed to send. The retard roller 83 is disposed so as to be able to come into contact with the paper feed roller 82, and when the paper is fed by the paper feed roller 82, only the uppermost paper is frictionally separated from the lower paper. Yes. The paper return lever 84 is formed in a claw shape and is disposed in the vicinity of the paper feed roller 82 so that the lower layer paper separated by the retard roller 83 is hooked on the claw and returned to the hopper 81.

  As shown in FIG. 4, the transport mechanism 182 is provided with a paper feed roller 85 that feeds paper in the sub-scanning direction in synchronization with the recording operation, a driven roller 86, and the like. The paper feed roller 85 is disposed on the upstream side of the transport of the platen 203 and feeds the paper fed by the paper feed roller 82 together with the driven roller 86 to the platen 203.

  As shown in FIG. 4, the paper discharge mechanism 183 includes a paper discharge roller 87, a first jagged roller 88a, a second jagged roller 88b, and the like. The first knurled roller 88 a is disposed on the downstream side of the platen 203, and the second knurled roller 88 b and the paper discharge roller 87 are disposed on the downstream side of the first knurled roller 88 a so as to pass through the platen 203. The incoming paper is first discharged by the first jagged roller 88a, and is then nipped by the second jagged roller 88b and the paper discharge roller 87 to be discharged onto the stacker 152. Note that the first and second serrated rollers 88a and 88b are held by the same holding member (not shown).

  As shown in FIG. 4, the control unit 190 includes a main board 191 that constitutes a printer controller. The main board 191 is mounted with control elements and storage elements such as CPU, ROM, RAM, and ASIC (not shown) and other various circuit elements. Then, the paper conveyance unit 180, the recording unit 200, and the like constituting the print engine are controlled.

  As shown in FIG. 4, the recording unit 200 includes a carriage 201 that moves in the main scanning direction in synchronization with the recording operation, a recording head 202 that ejects ink in synchronization with the recording operation, and a flat sheet during recording. A holding platen 203 and the like are disposed. As shown in FIG. 3, the carriage 201 is inserted into the carriage guide shaft 204 and connected to the carriage belt 205 above the platen 203. When the carriage belt 205 is actuated by a carriage motor (not shown), Along with the movement, it is guided by the carriage guide shaft 204 to reciprocate.

  As shown in FIG. 4, the recording head 202 is mounted on the carriage 201 so as to be spaced from the platen 203 by a predetermined distance, and two types of black, for example, photo black and matte black ink, yellow, cyan, Seven inks of light cyan, magenta, light magenta, gray, and red can be ejected. That is, the recording head 202 is provided with a pressure generating chamber and a nozzle opening connected to the nozzle plate, and is controlled from the nozzle opening toward the sheet by storing ink in the pressure generating chamber and pressurizing it with a predetermined pressure. Ink droplets of different sizes are ejected. The platen 203 is disposed between the paper feed roller 85 and the paper discharge roller 87 so as to face the recording head 202, and supports the conveyed paper surface. Next, details of the stacker 152, which is a characteristic part of the present invention, will be described with reference to the drawings.

  5 is a perspective view of the storage state of the stacker 152 as viewed from the upstream side in the paper discharge direction, FIG. 6 is a side view thereof, and FIG. 7 is a perspective view of the protruding state of the stacker 152 as viewed from the downstream side in the paper discharge direction. 8 and 8 are side views thereof. The stacker 152 has a two-stage structure of a first stacker 51 and a second stacker 52. The first stacker 51 is attached to the front end side of the second stacker 52 so as to be rotatable about a rotation shaft 51a. The two stackers 52 are attached so that the guide mechanism 20 and the first stacker 51 can be pulled out and stored in parallel with the first stacker 51 while being translated obliquely up and down.

  The first stacker 51 is substantially perpendicular to the second stacker 52 shown in FIGS. 5 and 6 on the front end side of the second stacker 52 and substantially horizontal to the second stacker 52 shown in FIGS. 7 and 8. Rotate between. That is, as shown in FIGS. 5 and 6, when the second stacker 52 is stored, the first stacker 51 is substantially perpendicular to the second stacker 52 and closes the sheet discharge outlet 151. On the other hand, as shown in FIGS. 7 and 8, when the second stacker 52 is pulled out, the first stacker 51 is substantially horizontal with respect to the second stacker 52 and opens the paper discharge port 151.

  The second stacker 52 has a storage position inside the printer main body behind the paper discharge outlet 151 shown in FIGS. 5 and 6 and a drawer outside the printer main body located in front of the paper discharge outlet 151 shown in FIGS. The first stacker 51 and the first stacker 51 are moved obliquely up and down. That is, as shown in FIGS. 5 and 6, at the storage position, the second stacker 52 moves obliquely downward and is positioned below the recording unit 200 and the paper discharge unit 150. On the other hand, as shown in FIGS. 7 and 8, the second stacker 52 is moved obliquely upward at the pulled-out position, and the rear end is positioned close to the paper discharge outlet 151.

  Further, as shown in FIGS. 7 and 8, the second stacker 52 has a two-stage structure of a first stacker portion 52a and a second stacker portion 52b. The first stacker portion 52a is formed in a hollow flat plate shape. The second stacker portion 52b is formed in a flat plate shape having a slightly smaller support width than the first stacker portion 52a, and is slidable horizontally inside the first stacker portion 52a.

  As a result, the second stacker unit 52b can be stored and pulled out from the first stacker unit 52a. The second stacker 52 is used with the second stacker unit 52b stored in the first stacker unit 52a when the size of the discharged paper is small, and when the size of the discharged paper is large, The second stacker unit 52b is used in a state of being pulled out from the first stacker unit 52a.

  As shown in FIGS. 6 and 8, the guide mechanism 20 includes a guide cam 21 and a guide gear 22, which are disposed on both sides of the second stacker 52. The guide mechanism 20 has a function of smoothly guiding the vertical movement of the stacker 152 obliquely up and down. The guide cam 21 includes two guide pins 23 and 24 and two guide grooves 25 and 26 into which the guide pins 23 and 24 are inserted, and these are arranged on both sides of the second stacker 52, respectively. It is installed.

  The guide pins 23 and 24 are disposed behind the side surface of the first stacker portion 52a of the second stacker 52 so as to be shifted in the pull-out / storage direction and the vertical direction. That is, the guide pin 23 protrudes in the vicinity of the rear end portion of the side surface of the first stacker portion 52a, and the guide pin 24 is a predetermined distance below the guide pin 23 on the side surface of the first stacker portion 52a. It protrudes a predetermined distance from 23.

  Each guide groove 25 and 26 is formed in the guide formation member 27 arrange | positioned so that the both sides of the 1st stacker part 52a may be followed. Each guide groove 25, 26 is formed so as to connect between the first end portions 25a, 26a for positioning the storage position of the stacker 152 and the second end portions 25b, 26b for positioning the drawing position of the stacker 152. Yes. In other words, the guide grooves 25 and 26 are substantially horizontal horizontal grooves 25c and 26c from the first ends 25a and 26a to the front, and first inclined grooves 25d and 26d inclined obliquely upward at a gentle angle. The second inclined grooves 25e and 26e inclined obliquely upward at a slightly steep angle from the first inclined grooves 25d and 26d, and inclined obliquely upward at a slightly gentle angle (for example, 4 degrees) from the first inclined grooves 25d and 26d. The second inclined portions 25b and 26b are formed so as to reach the second inclined grooves 25f and 26f.

  When the guide pins 23 and 24 are inserted and moved, the guide pins 25 and 26 are the same groove, that is, the horizontal grooves 25c and 26c, the first inclined groove 25d, 26d, the second inclined grooves 25e, 26e, or the third inclined grooves 25f, 26f are arranged so as to be shifted in the vertical direction with respect to the drawing / storage direction. That is, the guide groove 25 is formed in the vicinity of the rear end portion of the side surface of the guide forming member 27, and the guide groove 26 is a predetermined distance below the guide groove 25 on the side surface of the groove forming member 27 and is predetermined from the guide groove 25. Formed a distance forward.

  The guide gear 22 includes a pinion gear 28 and a rack gear 29 that meshes with the pinion gear 28, and these are respectively disposed on both sides of the second stacker 52. The pinion gear 28 is rotatably fitted to the guide pin 23 with the guide pin 23 as an axis. The rack gear 29 is disposed on the guide forming member 27 so as to mesh with the upper edge of the pinion gear 28. That is, the rack gear 29 is disposed along the upper edge of the guide groove 25.

  FIG. 9 is a view showing the position of the bottom surface of the stacker 152 and the positions of the guide pins 23 and 24 and the pinion gear 28 in the guide grooves 25 and 26 when the stacker 152 is stored and pulled out. When the guide pins 23 and 24 and the pinion gear 28 are positioned at the first ends 25a and 26a of the guide grooves 25 and 26, which are the storage positions, the bottom surface position L1 of the stacker 152 is substantially horizontal. . This state is maintained while the stacker 152 is pulled out and the guide pins 23 and 24 and the pinion gear 28 pass through the horizontal grooves 25c and 26c of the guide grooves 25 and 26, respectively.

  When the stacker 152 is further pulled out and the guide pins 23 and 24 and the pinion gear 28 reach the boundary between the horizontal grooves 25c and 26c of the guide grooves 25 and 26 and the first inclined grooves 25d and 26d, the stacker 152 The bottom surface position L2 is slightly inclined forward and downward, but is substantially horizontal. In this state, as shown by bottom surface positions L3 and L4, the stacker 152 is further pulled out, and the guide pins 23 and 24 and the pinion gear 28 pass through the first inclined grooves 25d and 26d of the guide grooves 25 and 26, respectively. This is maintained until the boundary between the first inclined grooves 25d and 26d and the second inclined grooves 25e and 26e is reached. At this time, the stacker 152 moves obliquely upward.

  When the stacker 152 is further pulled out and the guide pins 23 and 24 and the pinion gear 28 enter the second inclined grooves 25e and 26e of the guide grooves 25 and 26, the bottom surface position L5 of the stacker 152 returns to a substantially horizontal position. . This state is maintained while the stacker 152 is further pulled out and the guide pins 23 and 24 and the pinion gear 28 pass through the second inclined grooves 25e and 26e of the guide grooves 25 and 26, respectively. At this time, the stacker 152 further moves obliquely upward.

  When the stacker 152 is further pulled out and the guide pins 23 and 24 and the pinion gear 28 reach the boundary between the second inclined grooves 25e and 26e of the guide grooves 25 and 26 and the third inclined grooves 25f and 26f, The bottom surface position L6 of 152 is slightly inclined forward and obliquely upward, but is maintained substantially horizontal. This state is maintained until the stacker 152 is further pulled out and the guide pins 23 and 24 and the pinion gear 28 reach the second ends 25b and 26b of the guide grooves 25 and 26, as indicated by the bottom surface position L7. . At this time, the stacker 152 moves obliquely upward and is positioned at the extraction position. The same applies to the case where the stacker 152 moves from the drawer position to the storage position.

  According to the stacker 152 configured as described above, before using the ink jet printer 100, the user puts a finger on the upper portion of the first stacker 51 and rotates the first stacker 51 toward the front to discharge the paper outlet 151. Open. Then, the tip of the first stacker 51 is picked up with a finger, and the second stacker 52 is pulled out by being translated obliquely upward. In addition, after using the ink jet printer 100, the second stacker 52 is moved obliquely downward and stored by pushing the tip of the first stacker 51 by hand. Then, the first stacker 51 is attached to the first stacker 51 and the first stacker 51 is rotated backward to close the sheet discharge outlet 151.

  Here, as described in the problem to be solved, the stacker 152 is in a cantilever state in which the rear end side is supported by the printer main body and the front end side protrudes obliquely upward from the printer main body when pulled out. For this reason, if some external force is applied to the upper surface of the stacker 152, a moment is generated with the rear end side of the stacker 152 as a fulcrum, and the stacker 152 may be damaged. Therefore, in the present embodiment, a device for solving the above-described problem has been taken, which will be described below with reference to the drawings.

  FIG. 10 is a diagram illustrating a state of the guide pin 24 in the guide groove 26 when the stacker 152 is pulled out. An inclined portion 26g for solving the above problem is formed between the second inclined groove 26e and the third inclined groove 26f in the guide groove 26. The inclined portion 26g is formed in the vicinity of the second end portion (top dead center position) 26b at an angle θ larger than the friction angle with the guide pin 24. Here, the friction angle refers to an angle immediately before the object starts to slide when the surface (inclined portion 26g) on which the object (guide pin 24) is placed is gradually inclined. The inclination angle θ of the inclined portion 26g can be obtained as follows.

When a substantially vertical external force F is applied to the upper surface of the stacker 152, a substantially vertical external force F is also applied to the guide pin 24 located at the boundary (second end portion 26b) between the inclined portion 26g and the third inclined groove 26f. . And the component force F2 perpendicular | vertical to the component force F1 parallel to the inclination part 26g of this external force F is represented by following Formula (1), (2) from inclination angle (theta) of the inclination part 26g.
F1 = Fsinθ (1)
F2 = Fcosθ (2)
Here, the condition that the guide pin 24 slides down along the inclined portion 26g of the guide groove 26 by the external force F is as follows when the friction coefficient between the guide pin 24 and the inclined portion 26g of the guide groove 26 is μ. It is represented by Therefore, when the above equations (1) and (2) are applied to the following equation (3), the following equation (4) is derived. Then, rearranging the equation (4), the following equation (5) is obtained.
F1> μF2 (3)
Fsinθ> μFcosθ (4)
tan θ> μ (5)
Here, when the material constituting the inclined portion 26g, that is, the guide forming member 27 is plastic (for example, POM-ABS) and the friction coefficient μ is 0.25, the inclination angle θ is more than 14 degrees from the equation (5). A big angle. Therefore, for example, by forming the inclination angle θ at 20 degrees, when an external force F in the substantially vertical direction is applied to the upper surface of the stacker 152, the guide pin 24 slides down along the inclined portion 26g of the guide groove 26, that is, the stacker 152. Since the external force F is released by moving obliquely downward, damage to the stacker 152 due to the external force F can be prevented.

  The inclined portion 26g is formed in the guide groove 26 that guides the guide pin 24 on the drawing direction side. The reason is that when a substantially vertical external force F is applied to the upper surface of the stacker 152, the guide on the drawing direction side. This is because the guide pin 23 on the storage direction side may be damaged using the pin 24 as a rotation fulcrum. Further, by forming such an inclined portion 26g, even if a slight external force F is applied to the stacker 152, the stacker 152 moves obliquely downward. Therefore, when the stacker 152 is pulled out, that is, when the guide pin 24 is positioned at the second end portion 26b, the stopper is applied.

  FIG. 11 is a perspective view showing the stopper. FIG. 6 is a perspective view of the stacker 152 being pulled out, that is, the state where the guide pin 24 is positioned at the second end portion 26b, as viewed from the back side of the stacker 152. The stopper 30 includes a stopper main body 31 provided at the rear side of the first stacker portion 52 a of the second stacker 52 and a stopper hole 32 provided at the inner surface of the guide forming member 27. The stopper main body 31 is formed in a cantilever shape extending in parallel with the side surface of the first stacker portion 52a, and a hemispherical protruding portion 31a protruding outward is formed at a free end thereof. The stopper hole 32 is formed at a position where the protrusion 31a of the stopper body 31 can enter when the stacker 152 is pulled out, that is, when the guide pin 24 is positioned at the second end portion 26b.

  In such a configuration, when the stacker 152 is moving, the protrusion 31a of the stopper main body 31 is pressed against the inner side surface of the guide forming member 27. Therefore, the protrusion 31a is elastically deformed in the stopper main body 31. Slides on the inner surface of the guide forming member 27. When the stacker 152 is pulled out, that is, when the guide pin 24 is positioned at the second end portion 26b, the protrusion 31a enters the stopper hole 32, so that the stopper body 31 is restored. Therefore, since the state in which the stacker 152 is positioned obliquely upward is held by the stopper 30, even if a slight external force F is applied to the stacker 152, the stacker 152 moves obliquely downward. Can be prevented.

  Although an ink jet printer has been described as an example of the recording apparatus, any recording apparatus such as a facsimile apparatus and a copying apparatus can be applied. In addition to a recording apparatus, the meaning of a liquid ejecting apparatus that ejects a liquid corresponding to its use from a liquid ejecting head onto an ejected medium instead of ink and attaches the liquid to the ejected medium is, for example, a liquid crystal display or the like Color material jet head used for manufacturing color filters, electrode material (conductive paste) jet head used for electrode formation for organic EL display and surface emitting display (FED), bio-organic jet head used for biochip manufacturing, precision pipette The present invention can also be applied to an apparatus equipped with a sample ejection head or the like.

1 is a perspective view of an overall appearance configuration of an ink jet printer that is one of recording apparatuses according to an embodiment of the present invention, viewed obliquely from the front. FIG. It is the perspective view which looked at the whole external appearance structure of the printer of FIG. 1 from diagonally back. FIG. 2 is a perspective view illustrating an outline of an internal configuration of the printer of FIG. 1. FIG. 2 is a cross-sectional side view illustrating an outline of an internal configuration of the printer of FIG. 1. FIG. 3 is a perspective view of the storage state of the stacker of the printer of FIG. 1 as viewed from the upstream side in the paper discharge direction. FIG. 6 is a side view of FIG. 5. FIG. 2 is a perspective view of a protruding state of a stacker of the printer of FIG. 1 as viewed from the downstream side in the paper discharge direction. FIG. 8 is a side view of FIG. 7. It is a figure which shows the position of the bottom face of a stacker at the time of storing / drawing out the stacker of FIG. 5, and the position of each guide pin and pinion gear in each guide groove. It is a figure which shows the state of the guide pin in a guide groove when the stacker of FIG. 5 is pulled out. It is a perspective view which shows the stopper of the stacker of FIG.

Explanation of symbols

20 Guide mechanism, 21 Guide cam, 22 Guide gear, 23, 24 Guide pin, 25, 26 Guide groove, 26b Second end, 26g Inclined portion, 27 Guide forming member, 28 Pinion gear, 29 Rack gear, 51 First stacker 52 Second stacker, 100 Inkjet printer, 110 operation unit, 120 cartridge storage unit, 130 first rear paper feed unit, 140 second rear paper feed unit, 150 paper discharge unit, 151 paper discharge port, 152 stacker, 160 Front paper feed unit, 170 Waste ink collection unit, 180 Paper transport unit, 190 Control unit, 200 Recording unit, 210 Printer cover

Claims (4)

A medium stacker that is slidable obliquely up and down to load discharged medium,
A guide pin and a guide groove for guiding the oblique upper and lower slides are provided, and a portion of the guide groove near the top dead center position is formed as an inclined portion having an angle larger than a friction angle with the guide pin. Medium stacker. The guide pins and the guide grooves are respectively provided on both sides of the stacker, and two sets of the guide pins and the guide grooves on each side are arranged so as to be shifted in the pull-out / storage direction and in the vertical direction. The medium stacker according to claim 1, wherein the inclined portion is formed in the guide groove. A liquid ejecting apparatus that ejects liquid onto a medium to be ejected,
A liquid ejecting apparatus comprising the medium stacker according to claim 1. A recording device for recording on a recording medium,
A recording apparatus comprising the liquid ejecting apparatus according to claim 3.

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