JP5467170B2 - Ink cartridge attachment / detachment mechanism and printing apparatus - Google Patents

Description

  The present invention relates to an ink cartridge attachment / detachment mechanism in a printing apparatus.

  In recent years, ink jet printers have increased in speed and image size, and ink consumption has increased accordingly. Therefore, the demand for the amount of ink supplied from the ink cartridge to the ink jet recording apparatus is also increasing. Conventionally, ink is supplied to an ink jet printer by inserting an ink supply needle into an ink container in an ink cartridge. However, since the flow rate is small, the speed of the printer is increased and the image size is increased. In recent years, a joint mechanism using an inner plug and an O-ring has been used to increase the supply amount.

  However, in the joint mechanism using the above-described O-ring, the ink dripping from the joint portion is larger than that of the ink supply needle, and the user's hand and clothes or the mounting portion of the ink jet recording apparatus with the ink dripping on the inside of the apparatus or the cartridge. There was a risk of getting dirty. In particular, in a mechanism for attaching and detaching a cartridge in the horizontal direction as shown in FIG. 11, ink dripping tends to be remarkable.

  FIG. 11A shows a state in which the ink supply port 230 of the conventional ink cartridge is fitted to the holder portion 310. That is, the inner plug 231 provided in the ink supply port 230 of the ink cartridge is pushed into the ink supply port by pressing of the insertion shaft 312 provided in the holder part 310, and has a path communicating with the holder side ink path 311. The ink supply port is opened. As a result, the ink in the ink storage unit is supplied to the holder-side ink path 311 via the path 230a in the supply port.

  On the other hand, FIG. 11B shows a state where the ink supply port 230 of the ink cartridge is removed from the holder portion 310. As shown in the drawing, the ink remaining in the internal space 310a of the holder portion 310 cannot be held in the internal space 310a only by the O-ring 314 in the joint portion, and flows out to the outside of the joint portion.

  As a technique for these, for example, in an ink cartridge having an ink storage portion and an ink supply portion, the ink supply portion protrudes in a direction intersecting the supply port and protrudes outward from the supply port in the ink supply direction. There has been proposed a method in which an ink drop dripping from an ink supply unit is held by a capillary force by a projecting portion having a gap (Patent Document 1).

JP 2007-290349 A

  However, although the technique disclosed in Patent Document 1 has a function of receiving leaked ink and does not stain the mounting portion of the ink jet recording apparatus, it is not a mechanism that reduces ink leakage. The user's hands and clothes may be soiled. In particular, in the case of a mechanism that attaches and detaches in the horizontal direction, the amount of leakage is likely to increase. In view of these circumstances, it is desired to develop a mechanism for preventing ink leakage that flows out from the opening where the ink supply means of the printing apparatus can be inserted and removed when the ink cartridge is attached or detached.

  Therefore, the present invention has been made in view of the above points. For example, in a printing machine using ink such as an ink jet printer, when inserting or removing a supply means such as an ink cartridge, the ink cartridge is attached or detached. It is an object of the present invention to provide an ink cartridge attachment / detachment mechanism that prevents ink leakage from the engaging portion of the ink cartridge.

  In order to solve the above problems, the present invention is an ink cartridge attachment / detachment mechanism in a printing apparatus, which is provided in an ink supply port of an ink cartridge and is pressed outward by pressure from the inside to seal the supply port. An inner plug that is provided on the printing apparatus side, engages so as to cover the ink supply port, and has a joint-side ink path that communicates with the supply port in a fitted state, and an ink path in the joint portion The insertion shaft is inserted into the engaged ink supply port, the inner plug is pushed into the supply port, and the passage communicating with the joint-side ink passage is opened into the supply port, and the insertion shaft is slidably fitted to the insertion shaft. And an outflow prevention member that is urged toward the outside of the joint and is slid according to the engagement of the ink supply port.

  According to the present invention, when the ink cartridge mounted on the ink jet recording apparatus is removed, the outflow prevention member that has been in contact with the supply port side joint portion slides outside the joint portion according to the engagement of the ink supply port. In order to move, the ink which has flowed out of the joint portion can be held inside the joint portion by the outflow prevention member. In particular, the insertion shaft has both the function of pushing the inner plug on the ink cartridge side to open the ink path and the function of the sliding shaft for sliding the outflow prevention member. In addition, it is possible to reliably guide the ink into the joint portion and prevent the ink from flowing out of the joint portion after replenishment.

  In the above invention, the outflow prevention member preferably has a plate member that matches the inner shape of the ink path and a through hole that passes through the plate member. In this case, ink can be supplied from the ink cartridge to the ink jet recording apparatus by flowing the ink through the through hole. When the ink cartridge is removed, the through hole can hold the ink inside the joint portion by surface tension.

  In the above invention, the outflow prevention member has a plate member that matches the inner shape of the ink path, and an insertion hole that is penetrated substantially at the center of the plate member and through which the insertion shaft is inserted. It is preferable that the ink flow path be formed between the inner surface of the insertion hole and the outer surface of the insertion shaft.

  In this case, ink can be supplied from the ink cartridge to the ink jet recording apparatus by flowing the ink through the insertion hole. At this time, the insertion hole is formed larger than the diameter of the insertion shaft, and since it is at the center of the ink path, an ink flow path can be secured during ink supply, and ink can be supplied quickly. Further, when the ink cartridge is removed, the through hole can hold the ink inside the joint portion by surface tension.

  In the above invention, the outflow prevention member is formed on the plate member matching the inner shape of the ink path, the through-hole penetrating the plate member at the outer edge of the plate member, and the surface of the plate member on the ink supply port side. It is preferable to have a convex portion. In this case, ink can be supplied from the ink cartridge to the ink jet recording apparatus by flowing the ink through the through hole. In addition, a space is created between the inner plug and the outflow prevention member by the convex portion, and an ink flow path can be secured when ink is supplied, enabling rapid ink supply. Further, when the ink cartridge is removed, the through hole can hold the ink inside the joint portion by surface tension.

  In the above invention, the outflow prevention member preferably has a plate member that matches the inner shape of the ink path, and the plate member is preferably formed of a porous member that allows ink to penetrate. In this case, ink can be supplied from the ink cartridge to the ink jet recording apparatus by the ink flowing through the perforations. Further, since the porosity occupies most of the entire outflow prevention member, it is possible to secure an ink flow path at the time of ink supply, and to promptly supply ink. Further, when the ink cartridge is removed, the porous can hold the ink inside the joint portion by surface tension.

  As described above, according to the structure of the present invention, for example, in a printing machine using ink, such as an ink jet printer, an ink card at the time of inserting / removing an ink cartridge when inserting / removing a supply means such as an ink cartridge. Ink leakage from the engaging portion of the ridge can be prevented.

FIG. 3 is a diagram illustrating an outline of a printing paper conveyance path of the printing apparatus according to the embodiment. 2 is an external view of an ink cartridge 200 according to an embodiment. FIG. It is a sectional side view of the exterior body 240 which concerns on embodiment. It is explanatory drawing of the liquid storage container 220 which concerns on embodiment. FIG. 3 is a cross-sectional view illustrating an attachment / detachment mechanism including the ink cartridge 200 according to the embodiment and a holder unit 310 on the printing apparatus 100 side. It is the schematic which shows typically the mechanism of the ink replenishment system which concerns on embodiment. It is sectional drawing which shows the structure and operation | movement of the attachment or detachment mechanism of the ink cartridge which concerns on embodiment. It is the front view and sectional view which show one form of the outflow prevention member concerning an embodiment. It is the front view and sectional drawing which show the other form of the outflow prevention member which concerns on embodiment. It is the front view and sectional drawing which show the other form of the outflow prevention member which concerns on embodiment. It is sectional drawing which shows the structure and operation | movement of the attachment / detachment mechanism of the conventional ink cartridge.

(Overall configuration of printing device)
Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating an outline of a printing paper conveyance path of the printing apparatus 100 according to the present embodiment. In the present embodiment, the printing apparatus 100 includes a plurality of ink heads having a large number of nozzles, prints black or color ink from each ink head, performs printing in units of lines, and prints on a recording sheet on a conveyance belt. An ink-jet line color printer that forms a plurality of images so as to overlap each other will be described as an example.

  In the present embodiment, the ink head includes four ink heads of yellow (Y), magenta (M), cyan (C), and black (K) arranged side by side along the paper transport direction, and a plurality of images. A color image is formed so as to overlap each other. The printing apparatus 100 includes an arithmetic processing unit 330. The arithmetic processing unit 330 also performs control related to ink supply from the ink cartridge in addition to the above-described print processing by the ink head, drive control of the transport mechanism, and the like. Do.

  The arithmetic processing unit 330 is configured by a processor such as a CPU or DSP (Digital Signal Processor), memory, hardware such as other electronic circuits, software such as a program having the function, or a combination thereof. Various functional modules are virtually constructed by appropriately reading and executing a program, and various functional modules for processing related to image data, operation control of each unit, and user operations are constructed by each constructed functional module. Process. In addition, an operation panel 340 is connected to the arithmetic processing unit 330, and an instruction and a setting operation by a user can be received through the operation panel 340.

  The printing apparatus 100 is provided with a cartridge mounting mechanism 30 for mounting the ink cartridge 200 on the front side of the apparatus. A plurality (four in this case) of the ink cartridges 200 of the respective colors are arranged and loaded on the cartridge mounting mechanism. The An upper surface device 350 is disposed so as to cover the upper side of the cartridge mounting mechanism 30, and the ink cartridge 200 is loaded by inserting it horizontally between the lower surface of the upper surface device 350 and the upper surface of the printing apparatus main body 1. Is called. The upper surface device 350 is provided with, for example, a sheet feeder and an operation panel.

  2 is an external view of the ink cartridge 200, FIG. 3 is a side sectional view of the exterior body 240, and FIG. 4 is an explanatory view of the liquid container 220. As shown in FIG. The ink cartridge 200 is an elongated casing that is detachably attached to the printing apparatus 100 in the horizontal direction. The ink cartridge 200 includes a liquid storage container 220 in which ink is sealed and an exterior body 240 in which the liquid storage container 220 is inserted. Has been.

  The exterior body 240 is a cylindrical body having a rectangular inner surface in cross section, and in this embodiment, a lateral side parallel to a horizontal plane including the insertion direction of the ink cartridge 200 and a vertical side perpendicular to the horizontal plane. The ratio is about 2: 1. Further, an engagement surface 210 that is engaged with the cartridge mounting mechanism 30 on the printing apparatus 100 side is fitted into the end surface of the exterior body 240 on the printing apparatus 100 side. The engagement surface 210 is formed of a hard material such as resin or metal, and is a contact surface that comes into contact with the cartridge mounting mechanism 30 of the printing apparatus 100.

  The engagement surface 210 has an ink supply port 230 disposed at the center thereof, and abutting surfaces 210a and 210a are disposed on the left and right sides of the supply port. The abutting surfaces 210a and 210a are members integrally formed of resin or metal, and are fitted into the end portion of the cylindrical exterior body 240 and fixed to the exterior body 240 with a paper label having an adhesive surface. Yes.

  A fitting portion 212 is formed above and below the center portion of the engaging surface 210 so as to be fitted by gripping means provided on the printing apparatus 100 side. Triangular convex portions are arranged in the fitting portion 212, and the concave portions of the gripping means are fitted with a click feeling by pushing the convex portions between the gripping means sandwiched by elastic force. It has become.

  In addition, a pair of convex portions 211 protrude from the upper portion of the engagement surface 210. The convex portion 211 is provided on only one surface so as not to make a mistake when the cartridge is attached. Further, when the convex portion 211 is fitted to the printing apparatus 100, it is detected by an attachment detection sensor provided on the printing apparatus 100 side. Specifically, the attachment detection sensor is a light receiving sensor, and detects the presence of the shielding object by blocking light reception. The convex portion 211 is approached to the light receiving sensor at the time of attachment, and the attachment is detected by blocking light reception.

  The engagement surface 210 is attached with a communication tag 250 that performs non-contact communication with a receiver provided on the printing apparatus 100 side. The communication tag 250 generates internal power using radio waves received from the receiver, reads and writes data to and from the memory using the power, and transmits and receives data through the antenna. In this embodiment, in this embodiment, the ink color of the cartridge, the type of water / oil, the number of times of attachment / detachment, and the like are stored, and when the attachment is detected by the cartridge attachment mechanism 30, communication with the non-contact communication interface is started. Then, the data stored in the device is transmitted.

  On the other hand, the exterior body 240 is formed of a material softer than the engagement surface 210, such as paper or a wood material, and can be cut out and bent. In the present embodiment, a recess 204 formed on the surface of the exterior body is formed on the lower surface of the exterior body 240 opposite to the engagement surface 210, and serves as a handle when the ink cartridge 200 is pulled out. In this embodiment, the recess 204 is a hole that penetrates the surface of the exterior body 240 and communicates with the interior hollow. The hole cuts a part of the member surface of the exterior body 240, and this portion is formed on the inner surface. And is bent toward the end side.

  In addition, a partition member 201 that secures a space shape between the inner surface of the outer body 240 and the pointed outer surface of the terminal end of the liquid storage container 220 is disposed at the inner end of the outer body 240. The space secured by the partition member 201 has a triangular side cross section, and is located in the exterior body 240 corresponding to the back surface of the recess 204. In addition, the part bent by the recessed part 204 is bent so that it may be located in the space ensured by the partition member 201. FIG.

  As shown in FIG. 4, the liquid storage container 220 is a bag body in which ink is enclosed, and in this embodiment, the four films are joined by thermal welding so that the side surface has four sides, A crease is formed by thermal welding on the joint sides of the four surfaces, and the cross section is a quadrangle in a state where ink is sealed. For this reason, in a state where the ink of the liquid storage container 220 is sealed, the quadrangle of the cross section is matched with the quadrangle of the cross section of the cylindrical exterior body.

  In addition, the liquid container 220 has a pair of ends that are pointed by sticking together a pair of surfaces parallel to a horizontal plane including the insertion direction, that is, ends of the upper and lower surfaces in a state of being loaded in the printing apparatus 100. It forms a shape, and the bonded portion of the upper and lower surfaces at the end of the pointed shape is linear by heat welding, and this linear portion is located in the horizontal plane. Furthermore, the liquid storage container 220 is formed with folds parallel to the insertion direction on the surface perpendicular to the horizontal plane including the insertion direction, that is, on the left and right side surfaces in a state of being loaded in the printing apparatus 100. As a result, the liquid storage container 220 having a quadrangular cross-sectional shape is crushed according to the crease as the ink inside flows out, and becomes a plane including the end on the line bonded by thermal welding at the end.

  Further, an ink supply port 230 is attached to the tip of the liquid storage container 220. The ink supply port 230 is configured to be incorporated in the center of the engagement surface 210 and to be a part of the engagement surface 210 when the liquid storage container 220 is inserted into and stored in the exterior body 240. ing. In this accommodated state, the ink supply port 230 protrudes in a direction that coincides with the direction of insertion into the exterior body 240 and is attached to and detached from the holder portion 310 on the printing apparatus 100 side.

  FIG. 5 is a cross-sectional view illustrating an attachment / detachment mechanism including the ink cartridge 200 and the holder unit 310 on the printing apparatus 100 side. As shown in the drawing, the ink supply port 230 is pressed outward by the pressure from the supply port side joint portion 232 and the supply port side joint portion 232, and the inner plug 231 that seals the ink supply port 230. It is roughly composed of

  The ink supply port 230 constitutes an attachment / detachment mechanism that is fitted to the holder unit 310 on the printing apparatus 100 side, and the ink cartridge 200 and the printing apparatus 100 are connected to each other by the attachment / detachment mechanism. Ink is supplied to 100.

  The holder part 310 includes a holder side joint part 313 fitted to the joint part 232 of the ink supply port 230 so as to cover the ink supply port 230, and the inside of the holder side joint part 313 includes a supply port. A holder-side ink path 311 that communicates with the ink supply port 230 on the ink cartridge 200 side is formed inside in the fitted state with the side joint portion 232.

  An insertion path 311 that protrudes toward the ink supply port 230 is provided in the ink path 311 in the holder portion 310. The insertion shaft 312 is inserted into the engaged supply port side joint portion 232, pushes the inner plug 231 into the supply port side joint portion 232, and connects the path 233 communicating with the holder side ink path 311 to the supply port side. The joint portion 232 is opened.

  With such an ink cartridge attachment / detachment mechanism, ink is supplied from the ink cartridge 200 loaded in the printing apparatus main body 1 through an attachment / detachment mechanism including the ink supply port 230 and the holder unit 310. FIG. 6 is a schematic view schematically showing the mechanism of the ink supply system.

  As shown in FIG. 6, ink from the ink cartridge 200 is filled into an ink tank 303 called a reservoir through an ink supply path 301. An electromagnetic opening / closing valve 302 is provided in the middle of the ink supply path 301, and the opening / closing of the flow path of the ink supply path 301 and the ink flow rate are controlled by the electromagnetic opening / closing valve 302. Further, in the ink tank 303, a liquid level sensor 303a for detecting the liquid level in the ink tank 303 and measuring the amount of filled ink is provided. Ink supply from the ink cartridge 200 to the ink tank 303 is performed by a pressure difference between the ink cartridge 200 arranged at a high place and the ink tank 303 installed at the low place.

  The ink filled in the ink tank 303 is sent out to the distributor 111 of the head unit 110 through the supply path 304, and is distributed from the distributor 111 to each of the ink heads 110a, 110b, 110c... The distributor 111 is provided with a temperature sensor 112 for measuring the temperature of the ink inside, so that the ink temperature immediately before being supplied to the ink heads 110a, 110b, 110c can be detected.

(Configuration of ink cartridge attachment / detachment mechanism)
In the present embodiment, an ink leakage prevention mechanism is provided in the holder portion 310 of the ink cartridge 200. FIG. 7 is an explanatory view schematically showing the operation of the ink leakage prevention mechanism.

  As shown in FIG. 7, the mechanism on the ink cartridge 200 side is provided in the joint portion 232 of the ink supply port 230 of the ink cartridge 200 and is pressed outward by the pressure from the inside to seal the ink supply port 230. An inside plug 231 is provided.

  On the other hand, on the holder portion 310 side, the holder is engaged so as to cover the ink supply port 230, and has an internal space 310a communicating with the joint portion 232 of the ink supply port 230 and a holder-side ink path 311 in the fitted state. A side joint portion 313 is provided. The holder side joint portion 313 is inserted into the ink supply port 230 in an engaged state, and the inner plug 231 is pushed into the ink supply port 230, and the holder side joint portion 313 is inserted. An insertion shaft 312 that opens the path 230 a in the supply port side joint portion 232 is provided in the path 233 that communicates with the ink path 311 on the side.

  Then, as a mechanism on the holder part 310 side, the mechanism is fitted to the insertion shaft 312 so as to be slidable, and is urged by the spring 315 toward the outside of the holder side joint part 313, and slides according to the engagement of the ink supply port 230. An outflow prevention member 320 to be moved is attached. The basic configuration of the outflow prevention member 320 includes a disk-shaped plate member that matches the inner shape of the internal space 310a that is an ink path, and a through hole that passes through the plate member.

  FIG. 7A shows a state where the ink supply port 230 of the ink cartridge is fitted with the holder portion 310. That is, the inner plug 231 provided in the ink supply port 230 of the ink cartridge is pushed into the ink supply port 230 by the pressing of the insertion shaft 312 provided in the holder part 310 and communicates with the holder-side ink path 311. The path is opened in the ink supply port 230. As a result, the ink in the ink storage unit is supplied to the holder-side ink path 311 via the path 230 a in the ink supply port 230. At this time, the ink that has flowed into the internal space 310 a is prevented from leaking to the outside by the O-ring 314 in the holder portion 310.

  In this state, the outflow prevention member 320 follows the engagement of the ink supply port 230 and remains in contact with the ink supply port 230, against the repulsive force of the spring 315, It is pushed in and is slid. At this time, the ink that has flowed in from the ink supply port 230 penetrates the gap between the through hole 323 of the outflow prevention member 320 and the spring 315 and flows into the holder-side ink path 311.

  Next, FIG. 7B shows a moment when the ink cartridge is removed. In other words, in the drawing, the ink supply port 230 on the ink cartridge 200 side is released from the engagement with the holder portion 310 of the printing apparatus 100 by pulling out the ink cartridge 200. At this time, the outflow prevention member 320 that comes into contact with the ink supply port 230 is urged toward the outside of the joint portion by the spring 315 and slides while holding the contact state with the ink supply port 230 outside the holder portion 310. Moving.

  At this time, ink remains in the holder-side ink path 311, the internal space 310 a, and the path 230 a in the supply port. On the other hand, since the inner plug 231 provided in the ink supply port 230 releases the push of the insertion shaft 312, the ink supply port 230 is sealed by the pressure from the inside of the ink cartridge, and further provided in the inner plug 231. Ink leakage is prevented by the ink leakage ring portion 234.

  Next, FIG. 7C shows a state where the ink cartridge is completely removed. That is, the outflow prevention member 320 is biased by the spring 315 and is positioned at the outer edge of the holder side joint portion 313. In addition, the O-ring 314 located outside the holder-side joint portion 313 holds the ink inside the holder-side ink path 311 and the internal space 310a of the joint portion 313 on the side facing the joint inside of the outflow prevention member 320. Is not leaked to the outside.

  On the other hand, the inner plug 231 provided in the ink supply port 230 seals the ink supply port 230 with the pressure from the inside of the ink cartridge and is further provided in the inner plug 231 because the insertion of the insertion shaft 312 is released. Ink leakage is sealed by the ring portion 234.

  Here, the spill prevention member 320 may have various structures as shown in FIGS. 8, 9 and 10, (a) is a front view of the outflow prevention member, and (b) shows the ink flow as seen from the side view. Hereinafter, it demonstrates for every figure.

  FIG. 8A shows a hole through which the insertion shaft 312 positioned approximately at the center of the disk-shaped plate member 321 is inserted in the outflow prevention member 320 and has an inner diameter larger than that of the insertion shaft 312. It has a hole 322 and a through-hole 323 that is disposed around the insertion hole 322 and penetrates the plate member 321.

With such a structure, as shown in FIG. 9B, ink from the ink cartridge 200 to the printing apparatus 100 flows through the through hole 323 and the insertion hole 322 in the direction of the arrow. Further, in the state shown in FIG. 7 (a) and (b), the convex portion 325 has a contact point between the supply port side joint portion 232, the gap between the supply port side joint portion 232 and the outflow preventing member 320 is formed Thus, it is possible to secure an ink flow path when supplying ink. On the other hand, as shown in FIG. 7C, when the ink cartridge is removed, the through hole 324 and the insertion hole 322 hold the ink in the internal space 310a due to surface tension and prevent the ink from flowing out.

  FIG. 9A shows an example in which a through hole 324 that penetrates the outflow prevention member 320 is formed in the outer edge portion of the disc-shaped plate member 321 in another form of the outflow prevention member 320. Also in this case, an insertion hole 322 is formed at a substantially center of the plate member 321, which is a hole through which the insertion shaft 312 is inserted and has an inner diameter larger than that of the insertion shaft 312. A convex portion 325 is formed on the surface of the plate member 321 on the ink supply port side.

  With such a structure, as shown in FIG. 9B, ink from the ink cartridge 200 to the printing apparatus 100 flows through the through hole 323 and the insertion hole 322 in the direction of the arrow. 7A and 7B, since the convex portion 325 has a contact point with the inner plug 231, a gap is formed between the inner plug 231 and the outflow prevention member 320, and the ink is supplied. An ink flow path can be secured. On the other hand, as shown in FIG. 7C, when the ink cartridge is removed, the through hole 324 and the insertion hole 322 hold the ink in the internal space 310a due to surface tension and prevent the ink from flowing out.

  FIG. 10A shows an example in which the plate member 321 is formed of a porous member 326 capable of penetrating ink in another form of the outflow prevention member 320. Also in this case, an insertion hole 322 through which the insertion shaft 312 is inserted is formed in the approximate center of the plate member 321, but the inner diameter thereof can be made smaller than that shown in FIG. 8 or FIG. 9 described above. it can.

  With such a structure, as shown in FIG. 10B, the ink supplied from the ink cartridge to the printing apparatus 100 passes through the porous member 326 and the insertion hole 322 and flows in the direction of the arrow. On the other hand, as shown in FIG. 7C, when the ink cartridge is removed, the porous member 326 and the insertion hole 322 hold the ink in the internal space 310a by the surface tension and flow out to the outside. To prevent.

(Action / Effect)
According to this embodiment, when the ink cartridge 200 attached to the printing apparatus 100 is removed, the outflow prevention member 320 that is in contact with the supply port side joint portion 232 is attached to the holder according to the engagement of the ink supply port 230. Since the ink slides to the outer edge of the side joint portion 313, the ink that has flowed out of the holder side joint portion 313 can be held inside the joint portion 313. In particular, the insertion shaft 312 serves both as a function of pushing the inner plug 231 on the ink cartridge side to open the ink path and a function as a sliding shaft for sliding the outflow prevention member 320. In the supply path, it is possible to reliably guide the ink into the holder side joint portion 313 and prevent the ink from flowing out of the holder side joint portion 313 after replenishment.

  As a result, according to the present embodiment, for example, in a printing machine using ink such as an ink jet printer, the opening of the holder side joint portion 313 is used when the ink cartridge 200 is inserted and pulled out when the ink cartridge is attached or detached. Ink can be prevented from leaking from the ink.

DESCRIPTION OF SYMBOLS 1 ... Printing apparatus main body 30 ... Cartridge attachment mechanism 100 ... Printing apparatus 110 ... Head unit 110a, 110b, 110c ... Ink head 111 ... Distributor 112 ... Temperature sensor 200 ... Ink cartridge 201 ... Partition member 204 ... Recessed part 210 ... Engagement surface 210a , 210a ... abutting surface 211 ... convex portion 212 ... fitting portion 220 ... liquid storage container 230 ... ink supply port 230a ... path 231 ... inner plug 232 ... supply port side joint part 233 ... path 234 ... ring part 240 ... exterior body 250 ... Communication tag 301 ... Ink supply path 302 ... Electromagnetic on-off valve 303 ... Ink tank 303a ... Liquid level sensor 304 ... Supply path 310 ... Holder part 310a ... Internal space 311 ... Holder side ink path 312 ... Insert shaft 313 ... Holder side joint part 31 ... O-ring 315 ... spring 320 ... outflow prevention member 321 ... plate member 322 ... insertion holes 323, 324 ... through hole 325 ... protrusions 326 ... porous member 330 ... processing unit 340 ... operation panel 350 ... top apparatus

Claims (2)

An ink cartridge attachment / detachment mechanism in a printing apparatus,
An inner plug that is provided in an ink supply port of the ink cartridge and is pressed outward by pressure from the inside to seal the supply port;
A printing device side joint portion provided on the printing device side, engaged so as to cover the ink supply port, and having a printing device side ink path communicating with the supply port in a fitted state;
In the ink path in the printing apparatus side joint, the ink supply port is inserted into the engaged ink supply port, the inner plug is pushed into the supply port, and a path communicating with the printing apparatus side ink path is formed in the supply port. An insertion shaft to be opened,
An outflow prevention member fitted to the insertion shaft so as to be slidable, urged toward the outside of the joint portion on the printing apparatus side, and slidably moved according to the engagement of the ink supply port;
The outflow prevention member is
A plate member matching the inner shape of the ink path;
In the outer edge portion of the plate member, and having a through hole that penetrates the plate member,
In the fitted state, the plate member is urged toward the outside of the printing device side joint portion, so that the plate member and the supply port side joint portion partially abut, thereby supplying the supply An ink cartridge attaching / detaching mechanism characterized in that the mouth side joint portion secures an ink flow path by facing a surface of the plate member on the outer side of the printing device side joint portion with a gap . The printing apparatus side ink that is pressed outward by pressure from the inside, engages to cover the supply port of the ink cartridge having an inner plug that seals the ink supply port, and communicates with the supply port in the fitted state A printing device side joint having a path inside;
In the ink path in the printing apparatus side joint, the ink supply port is inserted into the engaged ink supply port, the inner plug is pushed into the supply port, and a path communicating with the printing apparatus side ink path is formed in the supply port. An insertion shaft to be opened,
A printing apparatus having an outflow prevention member fitted to the insertion shaft so as to be slidable, urged toward the outside of the printing apparatus side joint, and slidably moved according to the engagement of the ink supply port; ,
The outflow prevention member is
A plate member matching the inner shape of the ink path;
In the outer edge portion of the plate member, and having a through hole that penetrates the plate member,
In the fitted state, the plate member is urged toward the outside of the printing device side joint portion, so that the plate member and the supply port side joint portion partially abut, thereby supplying the supply The mouth side joint portion secures an ink flow path by facing the surface of the plate member on the outer side of the printing device side joint portion with a gap therebetween.