KR20020088439A - A equipment for refilling ink of ink cartridge - Google Patents

Abstract

PURPOSE: An ink-refilling device for ink cartridge is provided to allow ink-refilling work to be performed in an easy and rapid manner by converting interior of ink cartridge into vacuum state through the capillary tube of ink cartridge. CONSTITUTION: An ink-refilling device comprises an ink-refilling part(200) and a balance part(300). The ink-refilling part is arranged at a main body of the ink-refilling device, and includes a suction line(240) and an ink injection line(230). An ink cartridge(10) is set inversely, and has top and bottom ends closed by a first jig(210) and a second jig(220), respectively. The suction line forms vacuum state by evacuating air from an interior of the cartridge through a capillary tube, and the ink injection line injects ink into the ink cartridge through the capillary tube. The balance part is arranged side by side to the ink-refilling part. The ink cartridge refilled with ink by the ink-refilling part is set upright, and top and bottom ends of the ink cartridge are closed by a third jig(310) and a fourth jig(320), respectively. Subsequently, proper amount of the ink and air existing within the ink cartridge are evacuated, to thereby balance pressure in the ink cartridge.

Description

Refilling device for ink cartridges {A equipment for refilling ink of ink cartridge}

The present invention relates to an ink cartridge refilling device of ink cartridges, wherein the ink cartridge is refilled with ink, and the process of adjusting the pressure balance inside the cartridge by extracting a certain amount of ink and air from the inside of the refilled cartridge is easier and more reliable. It is about.

Desk-jet inkjet printers have different characteristics for different printer manufacturers. In particular, the Hewlett Packard's Deskjet 500 and 600 series are thermal type inkjet printers. An ink jet printer is a model using a print head including an ink jet nozzle, which is a key element for printing, and a cartridge made by integrating an ink container.

Such a cartridge is classified into two types: a sponge insertion method in which a porous sponge for ink storage is inserted in the cartridge container, and an automatic pressure control method having an air bag in the cartridge container.

The cartridge 10 of the automatic pressure control method has a capillary tube 12 for adjusting pressure inside the lower part of the body 11 and an ink spray nozzle 14 in front of the capillary tube 12 as shown in FIG. A printhead 13 mounted up to is provided, and a cap 15 having an air hole (not shown) is covered at the top of the body 11. An air bag (not shown) is provided inside the body 11 to maintain a constant ink discharge pressure, and the air bag is provided to inject and extract air through the air hole of the cap 15.

The disposable cartridge 10 used in such a conventional printer has the performance of the print head 13 including the ink jetting nozzle 14, even if the total amount of ink is consumed under normal use conditions, so that the body 11 of the cartridge 10 As long as I can refill ink in), I can continue to use it.

However, the existing cartridges 10 are manufactured to be incapable of recharging ink in consideration of the operating policy of the inkjet printer manufacturer or various conditions. However, the economical loss and the burden on the consumer due to one-time use and disposal of expensive cartridges are eliminated. Auxiliary devices or devices have been developed for refilling ink in the body 11 of the cartridge 10 to solve.

As an aid related to this technology, Utility Model Registration No. 20-174627 discloses a fixed body formed to secure the side of the cartridge, the top of the cap, and the head of the lower end of the cartridge, and the ink container connection lid on one side of the fixed body. The airtight holding member is in close contact with the capillary inlet part without closing the capillary inlet of the capillary inlet, and is distributed with the cap for connecting the ink container, and the upper end of the fixing body adjacent to the cap for connecting the ink container is provided from the ink spray nozzle of the print head. It was composed of a head protection member that absorbs flowable ink and prevents damage to the ink jet nozzle.

As described above, the auxiliary device for refilling ink is provided with the cartridge attached to the fixed body, and then the ink container is connected to the lid for connecting the ink container of the fixed body. Since the pressure in the ink container is high, it is injected through the capillary of the cartridge.

Repeat this operation several times to fill the appropriate amount of refilled ink, set the cartridge upright, and inject 2 ~ 3㏄ air into the air pocket of the cartridge through the air hole of the cap to adjust the internal pressure balance of the cartridge, and then It was taken out from and used.

However, in all of these ink refilling aids, the user relies on manual labor, and if the work is cumbersome and wrong, the ink leaks and is easy to get on the cartridge or operator's hand. There was a problem that was not suitable for mass production of.

An object of the present invention is to solve the conventional problems as described above, refill the ink cartridge in the ink filling part on one side of the main body and extracts an appropriate amount of ink and air from the inside of the cartridge from the balance part of the cartridge By adjusting the internal pressure balance, it is possible to easily perform ink refilling even by a beginner, as well as to provide an ink cartridge refilling device of ink cartridge which enables mass production.

Another object of the present invention is to provide a first suction gun at the tip of the injection gun to suck and remove the ink and air discharged higher than the atmospheric pressure by the ink injected into the cartridge through the capillary of the cartridge, and also the cartridge It is also possible to form the inside of the vacuum to facilitate the injection of ink into the inside of the ink cartridge to provide an ink cartridge refilling device for ink can be injected more quickly and surely as well as clean.

1 is a perspective view of a conventional typical pressure regulating cartridge viewed from the bottom,

2 is a front view showing an ink refilling device for an ink cartridge according to the present invention;

3 is a side view of FIG.

4 is a pneumatic circuit diagram of the ink refilling device according to the present invention;

Figure 5a, 5b is a view showing in detail the first frame portion of the ink filling part of the present invention,

6a and 6b show in detail the second frame portion of the balance part of the present invention;

7 is a pneumatic circuit diagram showing another embodiment of the ink filling part in the recharging apparatus of the present invention.

<Explanation of symbols for main parts of drawing>

10: cartridge 11: body 12: capillary tube

13: Printhead 14: Inkjet nozzle 15: Cap

100: main body 110: control unit 200: ink filling parts

201: first frame 210: first working jig 212: first cylinder

213: first guide rod 214: first hermetic holding member 220: fixing jig

221: second hermetic holding member 222: third hermetic holding member 230: ink injection line

231: Ink line 232: Ink storage container 233: Filling gun

234: first switching valve 235: metering container 236: injection gun

237: first pneumatic line 237a: second pneumatic line 238: second switching valve

239: first regulator 240: first suction line 241: first suction gun

242: first recovery tank 243: first vacuum pump 244: second regulator

300: balance part 301: second frame 310: second working jig

311: fourth hermetic holding member 312: fifth hermetic holding member 313: connecting flow path

320: lifting jig 321: second cylinder 322: second guide rod

323: sixth hermetic holding member 330: balance line 331: second suction gun

332: second recovery tank 333: third regulator 334: vacuum pump

In order to achieve the above object, the present invention is provided on one side of the main body and the inlet line for fixing the upper and lower ends of the first working jig and the fixing jig in a state in which the cartridge is upside down and extract the air inside the cartridge from the capillary. And an ink filling part having an ink line for injecting ink through the capillary into the cartridge; One side of the ink filling part is provided, and the cartridge filled by the ink filling part is erected upright, and the upper and lower ends of the second working jig and the lifting jig are sealed and fixed, and the ink and air inside the cartridge are extracted appropriately and the pressure balance inside the cartridge is removed. Ink cartridge refilling device, characterized in that the balance part is provided to match.

The ink filling part is provided at a lower end of the first frame of the main body so that the ink filling part is elevated along the first guide rod by the elevating mechanism, and has a first hermetic holding member seated on the cap part of the cartridge to be in contact with the air hole in the center thereof. Working jig; A fixing jig attached to the first frame at the upper position of the first working jig and provided with a second and third hermetic holding member having a through hole at the center thereof so that only the periphery of the cartridge is not blocked; An injection gun is provided at the upper end of the first frame on which the fixing jig is mounted so as to flow through the through hole of the third hermetic holding member. An ink injection line having a first regulator and a second switching valve in a first pneumatic line so as to control the inside thereof at a predetermined pressure; A first suction gun is provided at the tip of the injection gun at the top of the first frame to flow through the through hole of the third hermetic holding member, and the first suction gun can suck and store ink and air therein through a capillary tube of the cartridge. And a first suction line provided with a first recovery tank, a first vacuum pump for generating the interior of the first recovery tank with a vacuum, and a second regulator for controlling a vacuum pressure inside the first recovery tank. do.

The ink storage container is characterized in that it is provided with a second pneumatic line having a fourth regulator for controlling the pressure therein.

The balance part is provided at a lower end of the second frame on one side of the main body, and a fourth hermetic holding member for seating the lower end of the cartridge to block the capillary tube, and a fifth hermetic holding having a through hole in the center so that only the periphery of the ink spray nozzle is sealed. A second work jig, in which a member is provided and a connection flow path circulated with the through hole of the fifth hermetic holding member; The lifting jig provided with a sixth hermetic holding member which is provided on the second frame at the upper position of the second working jig to be elevated along the second guide rod by the lifting mechanism and seals the air hole at the center thereof while pressing the cap on the top of the cartridge. ; A second suction tank is provided at the end of the connection flow path of the second working jig, and the second suction tank stores the ink or air sucked from the capillary of the cartridge according to the opening of the second suction jig, and the second recovery tank And a balance line in which a third regulator for controlling an internal vacuum pressure and a second vacuum pump for generating an interior of the second recovery tank in a vacuum are provided in series.

The elevating mechanism is sufficient if the elevating slider of the balance part and the second working jig of the ink filling part can be raised and lowered to a predetermined height. For example, the elevating mechanism may be provided by a cylinder or a pair of racks and pinions.

Hereinafter, an ink refilling device for an ink cartridge according to the present invention will be described in detail with reference to the accompanying drawings.

2 to 6 are diagrams for explaining the ink refilling apparatus of the ink cartridge according to the present invention.

The upper part of the main body 100 is provided with a control unit 110 for controlling each part or the whole, an ink filling part 200 is provided on one side of the lower part, and a balance part 300 is provided on the other side.

The ink filling part 200 is fixed to the upper and lower ends by the first working jig 210 and the fixing jig 220 while the cartridge 10 is upside down, and the air inside the cartridge 10 is capillary ( 12 is provided with an ink injection line 230 for injecting ink through the first suction line 240 and the capillary tube 12 of the cartridge 10.

The first working jig 210 has a first cylinder 212 is mounted on the lower end of the first frame 201 on the other side of the main body 100 and is mounted on the rod end thereof due to the operation of the first cylinder 212. The first airtight holding member 214 is provided to be elevated along the first guide rod 213 and is seated on the cap 15 of the cartridge 10 to be in contact with the air hole in the center thereof.

The fixing jig 220 is mounted on the first frame 201 in the upper position of the first working jig 210 and the second hermetic holding member 221 which is sealed in contact with the ink spray nozzle 14 of the cartridge 10 is And a third hermetic holding member 222 having a through-hole at the center thereof so as to seal the periphery of the capillary 12 of the cartridge 10 without being closed.

An injection gun 236 is provided in the fixing jig 220 of the first frame 201 so as to flow through the through hole of the third hermetic holding member 222, and the ink line 231 is provided in the injection gun 236. Ink storage container 232, the filling gun 233, the first switching valve 234 and the metering container 235 is connected in series through the operation of the first switching valve 234 of the metering container 235 Ink injection line 230 is connected such that ink is optionally supplied to injection gun 236. The ink storage container 232 and the quantitative container 235 are connected to a predetermined high pressure container and a first pneumatic line 237 distributed through the first pneumatic line 237 to selectively apply pressure to the quantitative container 235. A second switching valve 238 for applying and a first regulator 239 for controlling to a predetermined pressure is provided.

The first suction gun 241 is provided at the tip of the injection gun 236 mounted on the fixing jig 220 at the upper end of the first frame 201 so as to flow through the through hole of the second hermetic holding member 221. In the suction gun 241, the internal pressure is higher than the atmospheric pressure by the ink injected into the cartridge 10, and the second and third airtight from the capillary tube 12 and the ink jet nozzle 14 of the cartridge 10. When the holding members 221 and 222 are separated, the first suction line 240 sucks ink or air therethrough through the capillary tube 12 of the cartridge 10 so that ink or air inside the cartridge 10 is not discharged. It is provided. The first suction line 240 has a first recovery tank 242 for sucking and storing ink or air from the capillary tube 12 of the cartridge 10, and the interior of the first recovery tank 242 is vacuumed. A first vacuum pump 243 to generate and a second regulator 244 for controlling the vacuum pressure of the first recovery tank 242 are provided.

The balance part 300 is provided on one side of the ink filling part 200, and the cartridge 10 filled by the ink filling part 200 is directly upright, and the second working jig 310 and the lifting jig 320 are placed thereon. A balance line 330 is provided to tightly fix the lower end and to extract an appropriate amount of ink and air in the cartridge 10 to adjust the pressure balance in the cartridge 10.

The second working jig 310 is provided at the lower end of the second frame 301 and the lower part of the cartridge 10 is seated to block the inlet of the capillary tube 12. A fifth hermetic holding member 312 having a through hole is provided so that only the periphery of 14 is sealed, and a connection flow passage 313 which is in circulation with the through hole of the fifth hermetic holding member 312 is formed.

The lifting jig 320 has a second cylinder 321 is mounted on the frame 301 of the upper position of the second working jig 310, and is mounted on the rod end of the second cylinder 321 so that the second cylinder 321 is mounted. The sixth hermetic holding member 323 is lifted along the second guide rod 322 and seals the air hole at the center thereof while pressing the cap 15 at the top of the cartridge 10 by the operation of the second guide rod 322.

The balance line 330 is to adjust the pressure balance inside the refilled cartridge 10 by sucking and extracting the ink and air in the cartridge 10 seated on the second working jig 310, the second working jig The second suction gun 331 provided at the end of the connection passage 313 of the 310 and the ink or air sucked from the capillary tube 12 of the cartridge 10 as the second suction gun 331 is opened. A second recovery tank 332 to be stored, a third regulator 333 for controlling a vacuum pressure in the second recovery tank 332, and a second internally generated vacuum in the second recovery tank 332. A vacuum pump 334 is provided.

The process of recharging ink to the cartridge 10 by using the ink refilling apparatus of the present invention configured as described above will be described.

First, 80 to 90% of the ink is filled in the ink storage container 232 of the ink injection line 230 and high pressure air is applied to the first pneumatic line 237. Then, the first vacuum of the first suction line 240 is applied. Pump 243 is turned on to generate a vacuum. At this time, the ink is filled up to the upper limit level sensor 235a of the measuring container 235, and the filling gun 233 is closed and the first switching valve 234 is switched so that the measuring container 235 and the injection gun 236 are distributed. It is in a state.

In such a state, when the cap 15 of the cartridge 10 is placed on the first work jig 210 of the ink filling part 200 to be seated, the first cylinder 212 constituting the lifting mechanism is operated and placed on the rod. As a result, the first working jig 210 is guided up along the first guide rod 213 to stop while the upper end of the cartridge 10 is in contact with the fixing jig 220. At this time, the air hole of the cap 15 of the cartridge 10 is sealed by the first hermetic holding member 214 of the first working jig 210, and the capillary tube 12 and the ink spray nozzle 14 of the cartridge 10 are closed. ) Is sealed by the second and third hermetic holding members 221 and 222 of the fixing jig 220.

When the cartridge 10 is seated and sealed in the first working jig 210 as described above, the second switching valve 238 on the first pneumatic line 237 is operated by the control of the control unit 110 to measure the quantity container 235. Since the flow path is formed so as to flow with the predetermined amount of air pressure is applied to the container 235. At this time, the inside of the metering vessel 235 is maintained at a constant pressure by the first regulator (239).

In this state, since the injection gun 236 is opened by the control unit 110, the ink of the metering container 235 is kept in the second hermetic seal on the first switching valve 234-the injection gun 236-the fixing jig 220. Injection into the cartridge 10 through the member 221 begins. As such, the signal generated when the ink of the metering container 235 falls from the end of the lower limit level sensor 235b is transmitted to the control unit 110, and the control unit 110 receiving the signal closes the injection gun 236. By operating the second switching valve 238, the pneumatic pressure does not act in the metering vessel 235.

As the injection gun 236 is closed as described above, the first switching valve 234 is also switched and the filling gun 233 is opened immediately, so that the ink of the ink storage container 232 enters the upper limit level sensor 235a of the measurement container 235. It is injected to the end. Injecting ink into the metering container 235 may be performed by placing the pressure of the ink storage container 232 higher than that of the metering container 235. After the ink is injected up to the upper limit level sensor 235a of the metering container 235, the filling gun 233 is kept closed and the first switching valve 234 is the metering container 235 and the injection gun 236. ) Is switched back to flow.

After the ink injection into the cartridge 10 is completed as described above, the first suction gun 241 on the first suction line 240 is operated by the control unit 110 to open and close for 1 to 2 seconds. At this time, since the first suction line 240 maintains a vacuum state together with the first recovery tank 242 by driving the first vacuum pump 243, the cartridge 10 during the opening of the first suction gun 241. Inner ink and air are sucked in, and thus, the inside of the cartridge 10 becomes lower than atmospheric pressure.

In this way, the ink and air sucked from the cartridge 10 drops rapidly at the moment of reaching the first recovery tank 242, and the ink is accumulated at the bottom of the first recovery tank 242, and the air is the first vacuum pump. Is discharged through 243.

As described above, after the suction gun 241 on the first suction line 240 is closed, the first cylinder 212 constituting the lifting mechanism is operated, and the first work jig 210 is driven by the rod. 213) will be guided down. At this time, since the cartridge 10 is seated on the first working jig 210, the cartridge 10 is lowered together with the first working jig 210.

After the first work jig 210 is lowered, the worker removes the cartridge 10 from the first work jig 210 and seats the second work jig 310 of the balance part 300. At this time, the ink spray nozzle 14 and the capillary 12 portion of the cartridge 10 are placed in contact with the fourth and fifth hermetic holding members 311 and 312 of the second working jig 310.

As described above, after seating the cartridge 10 on the second working jig 310, the second cylinder 321 constituting the lifting mechanism is operated, and the lifting jig 320 moves the second guide rod 322 by the rod. Guided and descended. The elevating jig 320 is stopped at a position where it gently presses against the top of the cartridge 10 on the second working jig 310. At this time, the air hole of the cap 15 of the cartridge 10 is sealed by the sixth hermetic holding member 323 of the lifting jig 320, and the capillary tube 12 and the ink injection nozzle 14 of the cartridge 10 are closed. The fourth and fifth hermetic holding members 311 and 312 of the second working jig 310 are sealed.

After the lifting jig 320 is lowered, the ink and air inside the cartridge 10 are held in the fifth hermetic holding member due to the vacuum pressure acting on the balance line 330 as the second suction gun 331 is opened for several seconds. The through hole and the connection passage 313 of the 312 is discharged. Ink and air discharged from the cartridge 10 are approximately 0.5 to 3 kPa, and the pressure balance inside the cartridge 10 is adjusted.

The ink discharged from the cartridge 10 to the balance line 330 is recovered to the second recovery tank 332 at the end of the balance line 330.

As such, after the ink and air are discharged from the cartridge 10, the second cylinder 321 is operated again, and the lifting jig 320 is guided along the second guide rod 322 and raised by the rod. At this time, the cartridge 10 is mounted on the second working jig 310.

After the lifting jig 320 of the balance part 300 is raised, the cartridge 10 is removed from the second work jig 310, and the ink spray nozzle 14 is wiped clean, and then the ink spray nozzle of the cartridge 10 is removed. 14) You can ship the package so as not to damage it.

7 is a view showing another embodiment of the ink filling part in the ink refilling device of the present invention, the first pneumatic line 237 and the first pneumatic line 237 distributed to the ink storage container 232 is another one The second pneumatic line 237a is branched and connected to the second pneumatic line 237a except that the fourth regulator 239a is installed to maintain the ink storage container 232 at a predetermined pressure. It is prepared in the same way.

The process after it is seated and sealed in the first working jig 210 and the fixing jig 220 in the operation process of the ink filling part according to the configuration of another embodiment as described above will be described.

When the cartridge 10 is seated and sealed in the first work jig 210, the first suction gun 241 on the first suction line 240 is operated and opened by the control of the control unit 110, and the first suction is performed. As the gun 241 is opened, the air inside the cartridge 10 is sucked in, so that the inside of the cartridge 10 becomes a vacuum.

When the inside of the cartridge 10 becomes a vacuum, the first suction gun 241 is closed by the control unit 110 and then the injection gun 236 is opened. Due to the air pressure applied to the second pneumatic line 237a, the ink of the metering container 235 is transferred to the second hermetic holding member 221 on the first switching valve 234-the injection gun 236-the fixing jig 220. It is injected into the cartridge 10 through. At this time, due to the suction force by the vacuum pressure inside the cartridge 10 and the air pressure applied to the ink liquid surface of the metering container 235 is injected more quickly and no ink remains in the capillary tube 12 of the cartridge 10. Clean. The amount of ink injected into the cartridge 10 extends from the ink liquid level to the end of the lower limit level sensor 235b of the metering container 235.

As such, the control unit 110 closes the injection gun 236 and operates the second selector valve 238 by the signal transmitted from the lower limit level sensor 235b of the metering vessel 235. This is not working.

As the injection gun 236 is closed as described above, the first switching valve 234 is also switched and the filling gun 233 is opened immediately, so that the ink of the ink storage container 232 enters the upper limit level sensor 235a of the measurement container 235. It is injected to the end. Injecting ink into the metering container 235 may be performed by placing the pressure of the ink storage container 232 higher than that of the metering container 235. After the ink is injected up to the upper limit level sensor 235a of the metering container 235, the filling gun 233 is kept closed and the first switching valve 234 is the metering container 235 and the injection gun 236. ) Is converted back to flow.

As described above, unlike the prior art in which a large amount of production is not possible depending on manual operation, the ink refilling device of the ink cartridge according to the present invention refills the ink cartridge in the ink filling part on one side of the main body and the cartridge in the balance part on one side thereof. By extracting the appropriate amount of ink and air from the inside to adjust the pressure balance inside the cartridge, even beginners can easily refill the ink and have a unique effect of mass production.

In addition, the present invention is provided by the first suction gun at the tip of the injection gun to form a vacuum inside the cartridge through the capillary of the cartridge to inject the ink more quickly and surely, there is a unique effect that can be injected cleanly. .

Claims (4)

It is provided on one side of the main body 100 and the upper and lower ends of the cartridge 10 is fixed upside down with the first working jig 210 and the fixing jig 220 while the cartridge 10 is upside down. An ink filling part 200 having a first suction line 240 which is removed from the 12 and is formed in a vacuum and an ink injection line 230 which injects ink into the cartridge 10 through the capillary 12; The cartridge 10, which is provided on one side of the ink filling part 200, is filled up by the ink filling part 200, and the upper and lower ends thereof are hermetically fixed by the second working jig 310 and the lifting jig 320. Ink cartridge refilling device, characterized in that the balance part 300 is provided to extract the appropriate amount of ink and air in the cartridge (10) to adjust the pressure balance in the cartridge (10). The ink filling part 200 is provided at the bottom of the first frame 201 of the main body 100 so as to be elevated along the first guide rod 213 by a lifting mechanism, and a cap of the cartridge 10. (15) a first work jig 210 having a first hermetic holding member 214 on which a portion is seated and abuts with an air hole portion at its center; It is mounted on the first frame 201 in the upper position of the first working jig 210, and the through-hole in the center so that only the periphery of the ink injection nozzle 14 and the capillary tube 12 of the cartridge 10 is not blocked. Fixing jig 220 is provided with a second, third hermetic holding members (221, 222) having a; The first suction gun 241 is provided at the upper end of the first frame 201 on which the fixing jig 220 is mounted so as to flow through the through hole of the third hermetic holding member 222. A first suction line 240 connected to the first recovery tank 242 in a vacuum state so as to suck the air therein through the ink spray nozzle 14 of the cartridge 10; An injection gun 236 is provided at an upper end of the first frame 201 so as to flow through a through hole of the third hermetic holding member 222, and the injection gun 236 is filled with an ink line 231 through the ink gun 231. ), The first switching valve 234, the metering container 235 and the ink storage container 232 is provided, the first pneumatic line 237 to control the inside of the metering container 235 to a predetermined pressure An ink injection line 230 having a first regulator 239 and a second switching valve 238 in the ink injection line 230; A first suction gun 241 is provided at the tip of the injection gun 236 at the top of the first frame 201 to flow through the through hole of the third hermetic holding member 222, and the first suction gun 241 is a cartridge. A first recovery tank 242 capable of sucking and storing ink and air therein through the capillary tube 12 of FIG. 10 and a first vacuum pump for generating an interior of the first recovery tank 242 with a vacuum. (243) and the ink refilling device of the ink cartridge, characterized in that the first suction line 240 is provided with a second regulator 244 that can control the vacuum pressure inside the first recovery tank (242). According to claim 1, wherein the balance part 300 is provided on the lower end of the second frame 301 on one side of the main body 100, the lower end portion of the cartridge 10 is seated to block the capillary tube 12 A fifth hermetic holding member 312 having a through hole in the center is provided so that only the member 311 and the ink injection nozzle 14 are surrounded by the air. The third hermetic holding member 312 is circulated with the through hole of the fifth hermetic holding member 312. A second working jig 310 having a connection flow path formed therein; The second frame 3010 in the upper position of the second work jig 310 is provided to be elevated along the second guide rod 322 by the lifting mechanism, and while pressing the cap 15 of the upper end of the cartridge 10, the center thereof is pressed. A lifting jig 320 provided with a sixth hermetic holding member 323 for sealing an air hole therein; A second suction gun 331 is provided at the end of the connection passage 313 of the second working jig 310, and the second suction gun 331 is opened from the capillary tube 12 of the cartridge 10 according to its opening. The second recovery tank 332 for storing the sucked ink or air, the third regulator 333 for controlling the vacuum pressure in the second recovery tank 332, and the inside of the second recovery tank 332 Ink refilling device for an ink cartridge, characterized in that the second vacuum pump 334 for generating a vacuum is provided with a balance line 330 is provided in series. The ink refilling device according to claim 1, wherein the ink storage container (232) is connected to a second pneumatic line (237a) having a fourth regulator (239a) for controlling the pressure therein.