KR20060023910A - Ink-jet printer - Google Patents

Abstract

The present invention discloses an inkjet printer capable of printing various printed materials having different thicknesses. In the present invention, a conveyor is installed on the upper portion of the main body so as to load the printed matter in the X-axis direction, and an inkjet printing unit having a print head is provided on the upper portion of the conveyor so as to move up and down. The print head sprays ink while linearly reciprocating in the Y-axis direction with respect to the to-be-printed object to print the to-be-printed object. In addition, the main body is standing so that the first to fourth lead screw can rotate, the first to fourth lead screw is rotated in conjunction with the rotary operation mechanism and the interlocking device. The first and second carriages are fastened so as to be screwed into two of the first to fourth lead screws. The first and second carriages which are screwed by the rotation of the first to fourth lead screws raise and lower the inkjet printing unit. According to the present invention, the height of the inkjet printing unit can be easily and precisely adjusted with respect to the to-be-printed object, and the position of the inkjet printing unit set by the self-locking of the first to fourth lead screws is firmly maintained so that the print quality and Reliability can be improved.

Inkjet, Printer, Height Adjustable, Screw, Conveyor

Description

Inkjet Printer {INK-JET PRINTER}

1 is a perspective view showing the overall appearance of an inkjet printer according to the present invention;

Figure 2 is a perspective view showing the top cover separated from the inkjet printer of the present invention,

Figure 3 is a perspective view showing the configuration of the conveyor in the inkjet printer of the present invention,

Figure 4 is a perspective view showing the configuration of the lifting device, the rotary operation mechanism, the interlocking device and the first and second carriage in the inkjet printer of the present invention,

Figure 5 is a plan view showing the configuration of the lifting device, the rotary operation mechanism, the linkage device and the first and second carriage in the inkjet printer of the present invention,

6 is a side view showing the configuration of a conveyor, a first screw, a second screw, a first belt transmission device, a second belt transmission device, and a first carriage in the inkjet printer of the present invention;

7 is a side view showing the configuration of a conveyor, a third screw, a fourth screw, a first belt transmission device, a third belt transmission device, and a second carriage in the inkjet printer of the present invention;

8 is a front view showing the configuration of a conveyor, a lifting device and an inkjet printing unit in the inkjet printer of the present invention;

9 is a perspective view showing another example of the interlock device in the inkjet printer of the present invention.

<Explanation of symbols for the main parts of the drawings>

1: object 10: main body

11: base 12: first sideframe

13: second sideframe 20: conveyor

30: first belt conveyor 40: second belt conveyor

50: drive device 52: servo motor

54: Table 60: Inkjet Printing Unit

61: chassis 64: printhead

65: servomotor 66: container

67: bulk ink container 68: hose

100: lifting device 101: first lead screw

102: second lead screw 103: third lead screw

104: fourth lead screw 110: rotary operation mechanism

111: axis 112: handle

120: linkage device 130: first belt transmission device

140: second belt transmission device 150: third belt transmission device

160: first carriage 170: second carriage

180: controller 220: interlocking device

230: first belt transmission device 240: second belt transmission device

250: third belt transmission device 260: fourth belt transmission device

P1: Loading / Unloading Position P2: Printing Position

The present invention relates to an inkjet printer, and more particularly, to an inkjet printer capable of printing by easily adjusting the height of the inkjet printing unit on various printed matter of different thicknesses.

A printer is a device that interfaces with a computer and outputs data input from the computer to various printed matters such as paper or an object to print. The printer may be classified into an impact print using a mechanical impact and a non-impact print according to a method of printing information on a printed object. Non-impact printers have been developed for various types of printers, such as inkjet printers, laser printers, thermal printers, and electrostatic printers.

Inkjet printers can be found in many documents, such as US Pat. Nos. 6712450, 6726313, 6755514, 6758544, and 66789090. In the inkjet printer disclosed in the above documents, the printhead is configured to move in the width direction with respect to the conveying direction of the to-be-printed object, and to print by jetting ink on the surface of the to-be-printed object through the nozzles of the printhead. . However, since the height of the printhead cannot be adjusted with respect to the to-be-printed object, it is not suitable for printing a to-be-printed object having a large difference in thickness. In particular, the structure of loading a to-be-printed object by a feed roller and an idle roller of a roll feed is not only limited in thickness to which the to-be-loaded material can be loaded, but also a hard-to-be-printed material that cannot be printed. There is this.

On the other hand, an inkjet printer for printing a different thickness or hard to-be-printed object is disclosed in Korean Utility Model Publication No. 20-327398. In this technique, a frame is provided at a lower part of a table on which a printed object can be placed, and "X" shaped first and second linkages are provided at both sides of the lower part of the frame. The links of the first and second linkages are rotatably connected about the pivots, and the pivots coupled to the upper ends of the first and second linkages are respectively connected to the ball bushes that slide along the guide bars. It is connected. The ball bushes are connected by a moving bar, and the adjusting screw shaft is fastened to the screw holes of the moving bar through the frame. When the user rotates the adjusting screw shaft, the moving bar is screwed, and the ball bushes slide along the guide bars to guide the linear movement of the moving bar by the screw movement of the moving bar. The first and second ring cages are folded or unfolded by rotating the movement bar about the pivots by the linear movement of the moving bar, and thus the table is moved up and down to adjust the height of the print object with respect to the print head.

By the way, the inkjet printer of Korea Utility Model Publication No. 20-327398 has a complicated structure in which the upper part of the inkjet printer is moved because the printhead is orthogonal to the X-axis and Y-axis directions by the timing belt transmission devices. Therefore, when an operator loads and unloads a substrate on a table, there is a high possibility that the substrate will interfere with components such as the printhead and the timing belt motor, and there is a lot of trouble in loading and unloading the substrate to avoid interference. There is a problem that the workability is reduced due to the effort and time.

On the other hand, the top surface of the table must be formed with a groove for mounting the printed matter, or a clamp or a fixture must be installed to fix the printed material. have. In order to replace such a table, it is necessary to remove the table from the frame and fix another table to the frame. However, changing the table in a small space between the printhead and the first and second link cages is very cumbersome, which delays the preparation time and inadvertently damages the printhead due to operator contact with the table. It often happens.

In addition, the links of the first and second link cages are easily shaken by external shocks and mechanical vibrations generated during the Cartesian coordinate movement by the connecting structure of the pivots, thereby generating vibration of the table, thereby printing quality of the to-be-printed object. There is a problem that greatly lowers. In particular, mechanical vibrations and jitter generated during the Cartesian coordinate movement of the printhead may cause errors in the printhead, resulting in poor printing of the to-be-printed object.

The present invention has been made to solve the various problems of the prior art as described above, an object of the present invention is to provide an inkjet printer that can easily and accurately adjust the height of the inkjet printing unit for a variety of prints of different thicknesses To provide.

Another object of the present invention is to provide an inkjet printer capable of improving the printing quality and reliability by preventing mechanical vibration and jitter, since the position of the inkjet printing unit set by a simple structure is firmly maintained. .

Still another object of the present invention is to mount a to-be-printed object in the loading / unloading position of the to-be-exposed object to be exposed in front of the main body by the printing by the Y-axis motion of the to-be-printed object and the X-axis motion of the printhead. It is an object of the present invention to provide an inkjet printer capable of easily performing a table replacement and improving productivity by easily loading and unloading a substrate on a table.

Still another object of the present invention is to provide an inkjet printer capable of improving a design by a structure in which a driving device of a belt conveyor for loading an object on a printing position of an inkjet printing unit is disposed at the center of a conveyor frame.

An inkjet printer according to the present invention comprises: a main body; A conveyor installed in the main body to mount the to-be-printed object on the upper side and to transfer the printed matter in the X-axis direction; First and second lead screws rotatably installed on the main body and arranged to protrude from the one side of the conveyor to the upper portion of the conveyor; and the first and second rotatably installed on the main body and near the other side of the conveyor. Third and fourth lead screws arranged to protrude upward of the conveyor at a position corresponding to the second lead screws; Rotating operation means installed to rotate on the main body; Interlocking means for connecting the rotary operating means and the first to fourth lead screws such that the first to fourth lead screws rotate by rotation of the rotary operating means; A first carriage screwed to the first and second screws and a second screwed to the third and fourth screws such that vertical movement is possible at the top of the conveyor horizontally by the rotation of the rotary operation means. Carriage; An inkjet printing unit having a printhead, one end of which is coupled to the second carriage and the other end of which is arranged to eject ink while being capable of reciprocating in the Y-axis direction perpendicular to the conveying direction of the conveyor; Characterized in that.

In addition, the inkjet printer according to the present invention is characterized by providing a compact printer by installing a drive means for driving the conveyor in the center of the conveyor.

Hereinafter, a preferred embodiment of the inkjet printer according to the present invention will be described in detail with reference to the accompanying drawings.

First, referring to FIGS. 1 and 2, the inkjet printer of the present invention includes a main body 10 constituting an external appearance. The main body 10 is mounted on the base 11 and on both sides of the upper surface of the base 11 so as to face each other along the conveying direction (X-axis direction) of the to-be-printed object 1 such as paper and various objects. It consists of side frames 12 and 13. The first and second side frames 12 and 13 of the main body 10 are surrounded by the first and second side covers 14 and 15, and an upper portion of the first and second side covers 14 and 15. Top cover (16) is mounted in the center.

1 to 3 and 6 to 8, the inkjet printer of the present invention is a conveyor (20) that is installed to load and unload the substrate 1 in the upper center of the base (11) ), The conveyor 20 is installed to protrude from the front and rear of the base (11). The conveyor 20 is composed of first and second belt conveyors 30 and 40 which are arranged parallel to each other. The first and second conveyor frames 31 and 41 of the first and second belt conveyors 30 and 40 are parallel to each other along the conveying direction of the to-be-printed object 1 on both sides of the base 11 so as to be parallel to each other. It is installed. The first and second circular pulleys 32 and 42 of each of the first and second belt conveyors 30 and 40 are rotatably mounted in the inner center of the first and second conveyor frames 31 and 41. The first to fourth driven pulleys 33, 34, 43, and 44 are mounted on both inner ends of the first and second conveyor frames 31 and 41 so as to rotate. The first belt 35 of the first belt conveyor 30 is wound around the first prime pulley 32, the first and second driven pulleys 33 and 34, and the second belt conveyor 40 is wound on the second belt conveyor 40. The belt 45 is wound around the second prime pulley 42 and the third and fourth driven pulleys 43 and 44. The first and second driven pulleys 32 and 42 and the first to fourth driven pulleys 33, 34, 43, and 44 of the first and second belt conveyors 30 and 40 are timing pulleys. The first and second belts 35 and 45 may be configured with a timing belt. Thus, the timing belt conveyor composed of the timing pulley and the timing belt can accurately transmit power without slipping.

Further, the first and second circular pulleys 32 and 42 of the first and second belt conveyors 30 and 40 are coaxially connected by the shaft 21 so as to interlock with each other. The first belt 35 is tensioned by the first to third idle rollers 36a to 36c mounted on the first conveyor frame 31, and the second belt 45 has a second tension. The tension is maintained by the fourth to sixth idler rollers 46a to 46c attached to the conveyor frame 41. Each of the first to third idle rollers 36a to 36c and the fourth to sixth idler rollers 46a to 46c is connected to each other by the first to third axes 22a to 22c.

As shown in FIGS. 3 and 7, the conveyor 20 may be any one of the first and second prime pulleys 35 and 45 of the first and second belt conveyors 30 and 40, for example, the first one. The drive device 50 which provides a driving force to the two-driven pulley 45 is provided. The driving device 50 includes a mounting plate 51 mounted at a position close to the outer center of the second conveyor frame 41, and a servo motor mounted to provide driving force to the mounting plate 51. 52 and a gear train 53 (53a to 53d) for transmitting the driving force of the servomotor 52 to the shaft 21. In this way, when the driving device 50 is installed on the upper portion of the base 11, the conveyor 20 disposed in the center of the second conveyor frame 45, the driving device 50 is the first and second side frames ( 12, 13). Therefore, the inkjet printer of the present invention can improve the competitiveness of the product by improving the design compared to the general conveyor that is mounted so that the servo motor is exposed to the front end or the rear end of the conveyor frame.

1 to 3 and 8, a table 54 on which the printed matter 1 can be placed on the first and second belts 35 and 45 of the first and second belt conveyors 30 and 40. Is mounted on the lower surface of the table 54 and is supported by the inner ends of the first and second belts 35 and 45 so as to prevent the table 54 from flowing in the Y-axis direction. Is equipped. The spacer 55 may be replaced by a pair of legs protruding from both sides of the lower surface of the table 54 so as to be supported by the inner ends of the first and second belts 35 and 45. Between the first and second side frames 31 and 32 of the first and second belt conveyors 30 and 40, a cover 56 covering the shaft 21 and the first to third shafts 22a to 22c is provided. It is installed. 1, 2, and 6 to 8 illustrate that one object 1 is placed on the top surface of the table 54, but this is merely an example, and a plurality of objects on the top surface of the table 54 are illustrated. (1) can be put up. And the to-be-printed object 1 put on the upper surface of the table 54 forms a groove which can align the to-be-printed object 1 in the table 54, as it is well known, and is seated or fixed by a clamp or a fixing device. can do. As shown in Figs. 2 and 6 to 8, the front of the main body 10 loads the to-be-printed object 1 on the table 54 and freezes the to-be-printed object 1 from which the printing of the table 54 is completed. The loading / unloading position P1 is loaded. The center of the conveyor 20 is a printing position P2 which prints the to-be-printed object 1.

When it is necessary to keep the distance between the first and second belt conveyors 30 and 40 far in order to enlarge the inkjet printer, one or more belt conveyors may be placed in the center between the first and second belt conveyors 30 and 40. You can also add The added belt conveyor can stably maintain the conveyance of the large table 54. Although the first and second belt conveyors 30 and 40 of the conveyor 20 are illustrated as being straight, they may also be configured as closed curves. The closed curved conveyor can be used to continuously load / unload and print the printed matter 1 by using a plurality of tables 54. The first and second belt conveyors 30 and 40 may be replaced by roller conveyors or chain conveyors as necessary.

Meanwhile, the conveyor 20 includes a servo motor mounted on the base 11, a lead screw rotated by the drive of the servo motor, and a ball bush fastened to the lead screw and coupled to the table 54. Linear motion acture can be applied. In addition, the linear motion actuator may include a servo motor mounted on the base 11, a pinion rotating by driving the servo motor, and a rack engaged with the pinion and mounted on the table 54. Can be. And the linear motion of the table 54 by the operation of the linear motion actuator can be guided by the linear motion guide. The linear motion guide may include a guide rail mounted on the base 11 and a slider mounted to slide along the guide rail and fixed to the table 54. In addition, the linear motion guide may be composed of a guide bar mounted on the base 11 and a ball bush mounted to slide along the guide bar and fixed to the table 54.

2 and 8, the inkjet printer of the present invention includes an inkjet printing unit 60 which prints the surface of the to-be-printed object 1 which is placed on the table 54 and loaded, and an inkjet printing unit 60. Is installed at the upper portion of the table 54 so as to be able to move up and down (Z-axis movement). The inkjet printing unit 60 is mounted between the first and second side frames 12 and 13 along the Y-axis direction and parallel to the chassis 61 along the Y-axis direction. A plurality of guide bars 62 and a printhead 64 for printing ink by spraying ink onto the object 1 through a plurality of nozzles 63 while linearly reciprocating along the guide bars 62; It is composed of a servo motor 65 mounted to the chassis 61 to provide a driving force for the linear reciprocating motion of the print head 64. The construction and operation of the inkjet printing unit 60 includes the contents of US Pat. Nos. 6712450, 6726313, 6755514, 6758544, and 6678290, which are not described in detail.

As shown in FIGS. 1, 2 and 8, a container 66 is mounted on one of the first and second side covers 14 and 15, for example, the outer surface of the first side cover 14. The container 66 accommodates a plurality of bulk ink tanks 67 in which various colors of ink are stored. The nozzles 63 and the bulk ink barrels 67 are connected by flexible hoses 68 that are piped through slots 15a of the second side cover 15.

The ink of the bulk ink bottles 67 is sufficiently supplied from the bulk ink bottles 67 to the nozzles 63 through the hoses 68 by the pumping force generated by the injection force of the nozzles 63. The liquid level 67b of the ink stored in the bulk ink bottles 67 is positioned so that its highest water level is lower than the height of the nozzles 63 mounted on the lower surface of the printhead 64, and thus the nozzle 63 Can effectively prevent leakage of ink through the That is, when the bulk ink container 67 is positioned higher than the nozzles 63, ink is continuously leaked through the nozzles 63 while the print head 64 is stopped and the ink is leaked through the nozzles 63. The ink in the bulk ink bottle 67 is positioned lower than the height of the nozzle 63 to prevent the continuous supply of ink through the hose 68, thereby preventing leakage of ink through the nozzles 63. The bulk ink bottles 67 may be installed in the chassis 61 of the inkjet printing unit 60 so as to be concealed by the top cover 16 as necessary.

On the other hand, the bulk ink container 67 is made of a transparent glass, synthetic resin material, the operator can easily check the remaining amount of ink, and can easily fill the ink by opening the lid 67a of the bulk ink container (67). In this way, the ink can be filled only by the pre-fill cartridge structure in which the ink is filled in the bulk ink bottles 67, so that the use of the ink can be optimally performed to reduce the cost. When the length of the hoses 68 connecting the nozzles 63 and the bulk ink bottles 67 is too long to pump the ink by the injection force of the nozzles 63, the ink of the bulk ink bottles 67 is pumped conventionally. It may be supplied to the nozzles 63 by pumping.

1, 2 and 4 to 7, the inkjet printer of the present invention is a lifting device 100 for lifting and lowering the inkjet printing unit 60 with respect to the printed matter 1 placed on the table 54 ). The elevating device 100 includes first to fourth lead screws 101, 102, 103, 104, a rotary operation mechanism 110, an interlock device 120, and first and second carriages 160 and 170. Consists of.

As shown in FIGS. 4 and 5, each of the first to fourth lead screws 101 to 104 is arranged to form a quadrangle in plan view. The first lead screw 101 and the second lead screw 102 are erected so as to freely rotate the base 11 and the first side frame 101 of the main body 10, and the third lead screw ( 103 and the fourth lead screw 104 are erected so as to freely rotate the base 11 and the second side frame 13 of the main body 10. 6 to 8, the upper and lower portions of the first to fourth lead screws 101 to 104 are supported by the bearings 105 mounted on the first and second side frames 12 and 13. It is.

1, 2 and 4 to 7 again, the rotation operation mechanism 110 is any one of the first to fourth lead screw (101 ~ 104), for example, the first by the operator's manual operation It provides a rotational force to the lead screw 101. It consists of the shaft 111 which penetrates upright so that the base 11 may rotate, and the handle 112 attached to the upper end of the shaft 111. As shown in FIG. The rotation operation mechanism 110 may be configured as a servo motor that provides a driving force to rotate the first lead screw 101 as necessary.

As shown in FIGS. 4 to 7, the linkage device 120 rotates the first to fourth lead screws 101 to 104 by the rotation of the rotation operation mechanism 110 to rotate in conjunction with the rotation operation mechanism 110. ) And a first belt transmission device 130, a second belt transmission device 140, and a third belt transmission device 150 connecting the first to fourth lead screws 101 to 104. The first belt transmission device 130 is mounted on the bottom surface of the base 11 to transmit the rotational force of the shaft 111 to the first lead screw 101 and the third lead screw 103. The first belt transmission device 130 includes a first driven pulley 131 mounted at the lower end of the shaft 111, a first driven pulley 132 mounted at the lower end of the first lead screw 101, The second driven pulley 133 mounted on the lower end of the third lead screw 103 and the belt pulley 134 wound around the primary pulley 131 and the first and second driven pulleys 132 and 133. It is.

On the other hand, the second belt transmission device 140 of the interlock device 120 is mounted on the upper side of the first side frame 12 to connect the first lead screw 101 and the second lead screw 102 in pairs. . The second belt transmission device 140 includes a second driving pulley 141 mounted on the upper end of the first lead screw 101 and a third driven pulley 142 mounted on the upper end of the second lead screw 102. ) And a belt 143 wound around the second prime pulley 141 and the third driven pulley 142. The third belt transmission device 150 of the interlock device 120 is mounted on the second side frame 13 to connect the third lead screw 103 and the fourth lead screw 104 in pairs. The third belt transmission device 150 includes a third prime pulley 151 mounted on the upper end of the second lead screw 102 and a fourth driven pulley 152 mounted on the upper end of the fourth lead screw 104. ) And a third belt 153 wound around the third prime pulley 151 and the fourth driven pulley 152. The first to third driven pulleys 131, 141 and 151 and the first to fourth driven pulleys 132, 133, 142 and 152 of the first to third belt transmission devices 130, 140 and 150 are respectively timingd. The pulley may be configured, and the first to third belts 133, 143, and 153 may be configured as timing belts. The tension of the first to third belts 133, 143, and 153 can be maintained by the support of the idle rollers.

In addition, the first and second carriages 160 and 170 of the elevating device 100 are provided at the same height so as to be aligned in an arbitrary plane. The first carriage 160 is formed with first and second screw holes 161 and 162 to which the first and second lead screws 101 and 102 are fastened in a corresponding relationship, and the second carriage 170 is formed in the first carriage 160. Third and fourth screw holes 171 and 172 are formed to which the third and fourth lead screws 103 and 104 are fastened in a corresponding relationship. The first and second carriages 160 and 170 are screwed up and down by simultaneous rotation of the first to fourth lead screws 101 to 104. The inkjet printing unit 60 is mounted on the first and second carriages 160 and 170 by fixing the chassis 61.

Figure 9 shows another example of the linkage for transmitting the rotational force of the rotary operation mechanism to the first to fourth lead screw. Referring to FIG. 9, another example of the linkage device 220 includes first to fourth belt transmission devices 230, 240, 250, and 260. The first belt transmission device 230 is mounted on the bottom surface of the base 11 to connect the first lead screw 101 and the shaft 111 of the rotary operation mechanism 110. The first belt transmission device 230 includes a first driven pulley 231 mounted at the lower end of the shaft 111, a first driven pulley 232 mounted at the lower end of the first lead screw 101, The belt pulley 231 is wound around the pulley 231 and the driven pulley 232. The first belt transmission device 230 may be replaced by a gear train that transmits the rotational force of the shaft 111 to the first lead screw 101 as needed. In addition, the rotation operation mechanism 110 and the first belt transmission device 230 may be replaced by a servo motor and a gear train that provide a driving force capable of directly rotating the first lead screw 101 as necessary.

On the other hand, the linkage device 220, the second to fourth belt transmission device (240, 250, 260) is the first to fourth lead screw 101 to 104 so that the first to fourth lead screw 101 ~ 104 at the same time to rotate Pair 104). The second belt transmission device 240 is mounted on the upper side of the first side frame 12. The second belt transmission device 240 includes a second driving pulley 241 mounted on the upper end of the first lead screw 101 and a second driven pulley 242 mounted on the upper end of the second lead screw 102. ) And a belt 243 wound around the second prime pulley 241 and the driven pulley 242. The third belt transmission device 250 is mounted on the second side frame 13. The third belt transmission device 250 includes a third prime pulley 251 mounted on the upper end of the second lead screw 102 and a third driven pulley 252 mounted on the upper end of the fourth lead screw 104. ) And a third belt 253 wound around the third prime pulley 251 and the third driven pulley 252.

In addition, the fourth belt transmission device 260 is mounted on the lower surface of the base 11. The fourth belt transmission device 260 has a fourth prime pulley 261 attached to the lower end of the first lead screw 101 and a fourth driven pulley 262 attached to the lower end of the third lead screw 103. ) And a fourth belt 263 wound around the fourth driven pulley 261 and the fourth driven pulley 262. By the fourth belt transmission device 260, the first lead screw 101 and the fourth lead screw 104, the second lead screw 102 and the third lead screw 103, the second lead screw 102 And any one of the fourth lead screws 104 may be connected.

1, 2 and 8, the inkjet printer of the present invention operates the servo motor 52 of the conveyor 20, the print head 64 and the servomotor 65 of the inkjet printing unit 60. The controller 180 is controlled, and the controller 180 is installed in a lower portion of the base 11. The controller 180 is interfaced with a conventional computer by a universal serial bus connector (USB connector). The controller 180 controls the operation of the servomotor 52 of the conveyor 20, the printhead 64 of the inkjet printing unit 60, and the servomotor 65 by data input from a computer.

The operation of the inkjet printer of the present invention having such a configuration will now be described.

1, 2 and 8, the operator first adjusts the distance between the print 1 and the printhead 64 placed on the table 54 for printing the print 1. . When the worker rotates the handle 112 of the rotary operation mechanism 110 in the clockwise or counterclockwise direction, the shaft 111 is rotated together with the handle 112.

4 to 7, the rotational force of the shaft 111 is the first driven pulley 131, the first driven pulley 132, the second driven pulley 132 of the first belt transmission device 130 , 133 and the first belt 133 are transferred to the first lead screw 101 and the third lead screw 103, and the first lead screw 101 and the third lead screw 103 are the shaft 111. Is rotated together. The rotational force of the first lead screw 101 is the second lead screw 102 by the second driving pulley 141, the third driven pulley 142, and the second belt 143 of the second belt transmission device 140. The rotational force of the third lead screw 103 is transmitted to the fourth lead by the third driving pulley 151, the fourth driven pulley 152, and the third belt 153 of the third belt transmission device 150. Is delivered to the screw 104. Therefore, the first to fourth lead screws 101 to 104 rotate at the same time.

On the other hand, referring to Figure 9, the rotational force of the shaft 111 is made by the first driven pulley 231, the first driven pulley 232 and the first belt 233 of the first belt transmission device 230. 1 lead screw 101 is transmitted, the first lead screw 101 is rotated together with the shaft (111). The rotational force of the first lead screw 101 is controlled by the second lead pulley 241, the second driven pulley 242, and the second belt 243 of the second belt transmission device 240. Is passed on. The rotational force of the second lead screw 102 is controlled by the fourth lead pulley 261, the fourth driven pulley 262, and the fourth belt 263 of the fourth belt transmission device 260. Is passed on. The rotational force of the third lead screw 103 is the fourth lead screw 104 by the third prime pulley 251, the third driven pulley 252 and the third belt 253 of the third belt transmission device 250. Is passed on. Therefore, the first to fourth lead screws 101 to 104 rotate at the same time.

6 to 8, when the first to fourth lead screws 101 to 104 simultaneously rotate by the operation of the rotation operation mechanism 100 and the interlocking device 120, the first carriage 160 may be formed. The first and second screw holes 161 and 162 are screwed along the first and second lead screws 101 and 102, and the third and fourth screw holes 171 and 172 of the second carriage 170 are The screw moves along the third and fourth lead screws 103 and 104. At this time, the first and second carriages 160 and 170 ascend or descend in correspondence with the rotational movement directions of the first to fourth lead screws 101 to 104. The inkjet printing unit 60 moves up and down together with the first and second carriages 160 and 170, and thus can easily and accurately adjust the distance between the to-be-printed object 1 and the printhead 64.

In addition, the first and second lead screws 101 and 102 and the first and second screw holes 161 and 162 of the first carriage 160 and the third fourth lead screws 103 and 104 and the third The first and second carriages 160 on which the inkjet printing unit 60 is mounted by self-locking by fastening the third and fourth screw holes 171 and 172 of the second carriage 170. The position of is maintained firmly. Accordingly, mechanical vibration and jitter caused by the operation of the conveyor 20 and the inkjet printing unit 60 may be prevented, thereby improving print quality and reliability.

Referring back to Figures 1, 2 and 8, the operator places the to-be-printed object 1 on the table 54 in the loading / unloading position P1 and inputs a print command by the computer. The controller 180 controls the operation of the servomotor 52 of the conveyor 20, the printhead 64 of the inkjet printing unit 60, and the servomotor 65 by data input from a computer. When the servomotor 52 of the conveyor 20 is driven clockwise, the driving force of the servomotor 52 is driven by the gear train 52 and the first and second of the first and second belt conveyors 30 and 40. It is transmitted to the shaft 21 connecting the prime pulleys 32 and 42, and the first and second prime pulleys 32 and 42 rotate together. The first and second belt pulleys 32 and 42 of the first and second belt conveyors 30 and 40 rotate so that the first and second belts 35 and 45 travel along the X-axis direction. Load 54 from the loading / unloading position P1 to the printing position P2.

Next, when the to-be-printed object 1 on the table 54 is loaded at the printing position P2, the servomotor 65 of the inkjet printing unit 60 is driven to drive the printhead 64 along the Y-axis direction. By linear reciprocating motion, the nozzles 63 print by injecting ink onto the to-be-printed object 1 by the operation of the print head 64. In this way, the entire area of the to-be-printed object 1 is moved by moving the to-be-printed object 1 in the X-axis direction by the operation of the conveyor 20 and performing printing while the printhead 64 is moved in the Y-axis direction. Can print. When the printing of the to-be-printed object 1 is completed, the print head 64 of the inkjet printing unit 60 is returned to the initial position, and the print head 64 and the servomotor 65 are stopped.

Meanwhile, the servomotor 52 of the conveyor 20 is driven counterclockwise, and the first and second belts 35 and 45 of the first and second belt conveyors 30 and 40 are along the X axis direction. The table 54 is unloaded from the printing position P2 to the loading / unloading position P1 while traveling. When the table 54 reaches the loading / unloading position P1, the servomotor 52 is stopped. The operator can unload the printed matter 1 on which the printing is completed on the table 54, put the other printed matter 1 on, and continuously print the printed matter 1 as described above. The loading / unloading position P1 of the to-be-printed object 1 is located in front of the main body 10 due to the structure of printing by the Y-axis movement of the to-be-printed object 1 and the X-axis movement of the print head 64. Since the accessibility of the operator is improved, the work of replacing the table 54 can be easily performed, and the productivity of the printed matter 1 can be easily loaded and unloaded on the table 54 to improve productivity.

The embodiments described above are merely to describe preferred embodiments of the present invention, the scope of the present invention is not limited to the described embodiments, those skilled in the art within the spirit and claims of the present invention It will be understood that various changes, modifications, or substitutions may be made thereto, and such embodiments are to be understood as being within the scope of the present invention.

As described above, according to the inkjet printer according to the present invention, the height of the inkjet printing unit can be easily and accurately adjusted by the screw movement of the first to fourth lead screws and the first and second carriages for various printed matter of different thicknesses. I can regulate it. Since the position of the inkjet printing unit set by the self-locking of the first to fourth lead screws is firmly maintained, errors due to mechanical vibration and jitter can be prevented to improve print quality and reliability. In addition, the table is replaced by a table for mounting the to-be-loaded object at the loading / unloading position of the to-be-exposed object, which is printed by the Y-axis movement of the object and the X-axis movement of the printhead. This can be done easily, and productivity can be improved by simply loading and unloading the substrate on the table. And because the design of the belt conveyor drive unit for loading the to-be-printed object in the printing position of the inkjet printing unit is improved by the structure that is concealed in the center of the conveyor frame, there is an effect that can enhance the competitiveness of the product.

Claims (6)

A main body; A conveyor installed in the main body to mount the to-be-printed object on the upper side and to transfer the printed matter in the X-axis direction; First and second lead screws rotatably installed on the main body and arranged to protrude from the one side of the conveyor to the upper portion of the conveyor; and the first and second rotatably installed on the main body and near the other side of the conveyor. Third and fourth lead screws arranged to protrude upward of the conveyor at a position corresponding to the second lead screws; Rotating operation means installed to rotate on the main body; Interlocking means for connecting the rotary operating means and the first to fourth lead screws such that the first to fourth lead screws rotate by rotation of the rotary operating means; A first carriage screwed to the first and second screws and a second screwed to the third and fourth screws such that vertical movement is possible at the top of the conveyor horizontally by the rotation of the rotary operation means. Carriage, An inkjet printing unit having a printhead, one end of which is coupled to the second carriage and the other end of which is arranged to eject ink while being capable of reciprocating in the Y-axis direction perpendicular to the conveying direction of the conveyor; An inkjet printer, characterized in that. The method of claim 1, wherein the conveyor, A first conveyor frame mounted on an upper side of the main body along an X-axis direction, a first circular pulley mounted at an inner center of the first conveyor frame, and mounted at both ends of the first conveyor frame; A first belt conveyor having first and second driven pulleys and a first belt wound around the first driven pulley and the first and second driven pulleys; A second conveyor frame mounted on the other side of the main body in parallel with the first conveyor frame at intervals, a second circular pulley mounted at an inner center of the second conveyor frame, and a second conveyor frame of the second conveyor frame. A second belt conveyor having third and fourth driven pulleys mounted on both inner ends, and a second belt wound around the second prime pulley, the third and fourth driven pulleys; A shaft coaxially connected to said first and second circular pulleys; A servo motor mounted at a position close to the center of any one of the first and second conveyor frames to provide a driving force to any one of the first and second driving pulleys; A gear train for transmitting a driving force of the servo motor to the shaft; An inkjet printer, which is supported at both ends of the first and second belts, and constitutes a table on which the printed matter can be placed. The method of claim 1, The inkjet printing unit further comprises a plurality of bulk ink bottles for supplying ink to the print head through a plurality of hoses, the bulk ink bottles being mounted to the main body such that the liquid level of the ink is positioned lower than the height of the print head. An inkjet printer housed in a container. The method of claim 1, The rotation operation means, and the shaft is standing up to rotate on the main body; An inkjet printer, comprising: a handle mounted on an upper end of the shaft to rotate the shaft. According to claim 1, wherein the rotating operation means has a shaft that is erected to rotate on the main body, the linkage means and the first belt transmission device for connecting the shaft, the first lead screw and the third lead through; And a second belt transmission device connecting the first lead screw and the second lead screw, and a third belt transmission device connecting the third lead screw and the fourth lead screw. According to claim 1, wherein the rotating operation means has a shaft that is erected to rotate on the main body, The linkage means is a first belt transmission device for connecting the shaft and the first lead screw, and the first A second belt transmission device connecting the lead screw and the second lead screw, a third belt transmission device connecting the third lead screw and the fourth lead screw, any one of the first and second lead screws and the An inkjet printer comprising a fourth belt transmission device for connecting any one of the third and fourth lead screws.

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