KR20080071009A - Printer for a cylindrical object - Google Patents

Abstract

A printer for a cylindrical object is provided to be capable of printing a surface of cylindrical print matter directly. A printer for a cylindrical object comprises a main rotation body(100), a secondary rotation body, a drive unit(300), a printing unit(400) and a reciprocating transfer device(500). The main rotation body supports and rotates print matter with cylindrical shape. The secondary rotation body is installed in parallel so as to be spaced by fixed distance from the main rotation body, and supports the print matter. The drive unit drives the main rotation body. The printing unit ejects ink to a surface of the print matter. The reciprocating transfer device reciprocates the printing unit in a lengthwise direction of the print matter in parallel.

Description

Cylindrical printing device {Printer for a cylindrical object}

1 is a partial cutaway perspective view of a conventional flat printing apparatus,

2 is a perspective view of a cylindrical printing apparatus according to Embodiment 1 of the present invention;

3 is a-a cross-sectional view of the cylindrical printing apparatus of FIG.

4 is a perspective view of a cylindrical printing apparatus according to Embodiment 2 of the present invention;

5 is a side view of the cylindrical printing apparatus of FIG. 4 in the b direction;

6 is a perspective view of a cylindrical printing apparatus according to Embodiment 3 of the present invention;

FIG. 7 is a c-c cross-sectional view of the cylindrical printing apparatus of FIG. 6.

＊ Explanation of symbols for main part of drawing ＊

100: main rotating body 110: main shaft

120: main roller 200: driven rotating body

210: driven shaft 220: driven roller part

300: driving unit 310: gear

320: motor 400: printing unit

500: reciprocating transfer device 510: support member

520: belt 530: copper pulley

540: driven pulley 550: transfer motor

600: supply sensor 700: encoder

800: lifting device 810: rack gear

820: Pinion gear 830: Lifting motor

900: guide portion 910: guide projection

920: guide groove 990: sensor

B: Support body MP: Central control unit

CB: connecting body

The present invention relates to a cylindrical printing apparatus, and more particularly, to a cylindrical printing apparatus capable of printing directly on the surface of a cylindrical to-be-printed object.

Conventionally, it is not possible to directly print on the surface of a cylindrical object, and it printed on the film using the flat printing apparatus 10 as shown in FIG. 1, and attached the film to the surface of a cylindrical object. However, this method has a problem in that the film is attached to the surface of the cylindrical object after printing on the film, and the film often peels off during use of the cylindrical object.

On the other hand, in the case where the cylindrical article is an article that can be constructed by assembling a thin plate, a method of forming a cylindrical article by printing the first thin plate using the flat printing apparatus 10 and assembling the thin plate was used. However, this method has a problem in that the cylindrical article cannot be used when the cylindrical article cannot be constructed by assembling a thin plate, such as an article filled inside or an article that can only be produced integrally.

An object of the present invention for solving the above problems is to provide a cylindrical printing apparatus capable of printing directly on the surface of the cylindrical to-be-printed object.

Cylindrical printing apparatus of the present invention for achieving the object as described above is a main rotating body for supporting and rotating a cylindrical to-be-printed object, a type installed in parallel with a predetermined interval with the main rotating body and supporting the to-be-printed object And a reciprocating feeder for reciprocating the co-rotating body, the driving unit for driving the main rotating body, the printing unit for injecting ink onto the surface of the to-be-printed object, and the printing unit in parallel in the longitudinal direction of the to-be-printed object, It characterized in that for printing the surface of the to-be-printed object rotated by the rotation of the rotating body to the printing unit.

Here, the cylindrical printing apparatus may further include a supply sensor for detecting whether the to-be-printed object is supplied before printing or an encoder for detecting a print preparation operation of the main rotating body.

In addition, the cylindrical printing device, the lifting device capable of lifting the printing unit and the reciprocating transfer device according to the size of the diameter of the printed object, and the guide for guiding the printing unit and the reciprocating transfer device to move up and down It may further include wealth.

The printing unit of the cylindrical printing apparatus may further include a sensor for detecting a distance between the printing unit and the surface of the to-be-printed object.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

Hereinafter, a cylindrical printing apparatus according to Embodiment 1 of the present invention will be described in detail with reference to FIGS. 2 and 3.

As shown in FIG. 2, the cylindrical printing apparatus according to Embodiment 1 of the present invention includes a main rotating body 100, a driven rotating body 200, a driving unit 300, a printing unit 400, and a reciprocating transfer device. 500, and a supply sensor 600.

The main rotating body 100 supports and rotates the cylindrical to-be-printed object in parallel in the longitudinal direction. The main rotating body 100 is installed on the support body (B) parallel to the longitudinal direction of the to-be-printed object. The main rotating body 100 includes a main shaft 110 and the main roller portion 120. The main shaft 110 is installed to support the to-be-printed in the longitudinal direction, and is connected to the driving part 300. The main roller 120 is in contact with the to-be-printed object and is provided with an elastic body to prevent slipping. In addition, the main roller unit 120 is installed on the outer peripheral surface of the main shaft (110).

Accordingly, the main rotating body 100 supports the object to be printed through the main rotating roller unit 120, and the main rotating body 100 is rotated by the driving unit 300 to rotate the to-be-printed object. .

The driven rotating body 200 supports the to-be-printed object in the longitudinal direction of the to-be-printed body in parallel with the main rotating body 100. The driven rotary body 200 is installed in the support body (B) in parallel to have a predetermined interval with the main rotating body (100). The driven rotating body 200 includes a driven shaft 210 and the driven roller 220. The driven shaft 210 supports the to-be-printed material in the longitudinal direction and is installed to rotate freely. The driven roller 220 is in contact with the to-be-printed object, is provided with an elastic body to prevent slipping, and is installed on the outer circumferential surface of the driven shaft 210.

Surfaces of the main roller unit 120 and the driven roller unit 220 may be further provided with irregularities or protrusions. The unevenness or protrusion increases the frictional force between the surfaces of the main and driven roller parts 120 and 220 and the surface of the to-be-printed object to prevent slippage.

The driving unit 300 is connected to the main shaft 110 to provide power to the main shaft 110 so that the main rotating body 100 to rotate the to-be-printed object. The driving unit 300 includes a gear 310 and a motor 320.

The gear 310 is provided in plurality in the shaft of the main shaft 110 and the motor 320, and transmits the rotational force of the motor 320 to the main shaft (110). The motor 320 provides power for rotating the main shaft 110.

The printing unit 400 may print by a predetermined printing width of about 1 cm at a time. Therefore, when the printing by the printing unit 400 as much as the printing width is finished, the to-be-printed material should proceed to print on the next printing width portion.

In detail, the motor 320 prints the to-be-printed object so that the unprinted surface of the to-be-printed object is positioned below the printing unit 400 when the printing width is finished by the printing unit 400. Rotate to advance printing width. Then, the printing unit 400 prints on the surface of the unprinted to-be-printed object. The motor 320 repeats this process until all the printing is performed on the surface of the to-be-printed object during the printing operation. The motor 320 is controlled by the central control unit MP connected to the computer so as to operate organically in accordance with the printing progress state of the printing unit 400 as described above.

The printing unit 400 is installed to be positioned at the upper end of the to-be-printed object, and sprays ink to print the surface of the to-be-printed object. During the printing operation, the printing unit 400 repeats the printing process on this new surface when the surface of the to-be-printed object which is not printed by the motor 320 is located. The printing unit 400 is controlled by the central control unit MP such that the printing unit 400 operates in accordance with the rotation state of the printed object.

The reciprocating transfer device 500 controls the length of the to-be-printed portion so that the printing portion 400 may spray a predetermined amount and type of ink at a predetermined position under the control of the central controller MP. Reciprocate parallel to the direction. The reciprocating transfer device 500 is installed on the support body B in parallel with the longitudinal direction of the to-be-printed object. The reciprocating transfer device 500 includes a support member 510, a belt 520, a driving pulley 530, a driven pulley 540, and a transfer motor 550.

The support member 510 guides and supports the printing unit 400 so that the printing unit 400 can reciprocate. The support member 510 is installed on the support body B in parallel with the longitudinal direction of the to-be-printed object. As shown in FIG. 2, the support member 510 may be a guide and a support member such as a pair of support shafts, and any member may be used without limitation. For example, it may be provided in one frame.

A portion of the belt 520 is coupled to the printing unit 400, and transmits power so that the printing unit 400 supported by the supporting member 510 can reciprocate. The inner circumferential surface of the belt 520 is engaged with the outer circumferential surfaces of the driving pulley 530 and the driven pulley 540. In addition, the inner circumferential surface of the belt 520 is provided with a non-slip groove 521. The non-slip groove 521 prevents sliding between the belt 520, the driving pulley 530, and the driven pulley 540.

The belt 520 may be smoothly bent along the outer circumferential surfaces of the main and driven pulleys 530 and 540, but is provided with a material having less elasticity for accurate positioning of the printing unit 400.

The main pulley 530 is positioned at one end of the support member 510, and transmits power to allow the printing unit 400 to reciprocate through the belt 520.

The driven pulley 540 is located at the other end of the support member 510 and is installed to be freely rotatable. The driven pulley 540 is positioned in parallel with the main pulley 530 so that the belt 520 can be driven by the main pulley 540.

The outer circumferential surfaces of the main and driven pulleys 530 and 540 are provided with an anti-slip protrusion 541 that engages with the non-slip groove 521 of the belt 520. The anti-slip protrusion 541 prevents sliding between the belt 520 and the main and driven pulleys 530 and 540.

The transfer motor 550 is connected to the main pulley 530, and provides power to reciprocate the printing unit 400 through the belt 520. The transfer motor 550 is controlled by the central control unit MP so that the printing unit 400 may eject a predetermined amount and type of ink at a predetermined position.

The supply sensor 600 detects whether the to-be-printed object is supplied. The supply sensor 600 is installed between the main pulley 530 and the driven pulley 540, the bottom surface of the support body (B). In the cylindrical printing apparatus according to the first embodiment of the present invention, whether to start printing is controlled according to a detection result of the supply sensor 600. That is, printing is started only when the supply sensor 600 detects that the to-be-printed object is supplied.

Hereinafter, the operation of the cylindrical printing apparatus according to Embodiment 1 of the present invention will be described.

When the print command is first received, the supply sensor 600 detects whether the to-be-printed object is supplied. If the to-be-printed object is not supplied, the cylindrical printing device sends an error signal to the computer and stops the job. When the to-be-printed object is supplied, the printing unit 400 performs cleaning by itself, and then starts printing.

After the printing of the printing width of the printing unit 400 of about 1 cm is finished, the motor 320 rotates the main rotating body 100, so that the to-be-printed object is printed by the printing width of the printing unit 400. Rotate to proceed Next, the printing unit 400 performs a printing operation on the new surface as much as the printing width. The cylindrical printing apparatus may perform the printing operation on the entire outer circumferential surface of the to-be-printed object by repeating this process while the printing operation is in progress. The cylindrical printing apparatus sends a print end signal to a computer when printing is finished.

Hereinafter, the cylindrical printing apparatus according to Embodiment 2 of the present invention will be described in detail with reference to FIGS. 4 and 5. The cylindrical printing apparatus according to Embodiment 2 of the present invention is manufactured by remodeling an existing flat printing apparatus 10. In the cylindrical printing apparatus according to the second embodiment of the present invention, among the components of the flat printing apparatus 10, a configuration of a printing unit, a reciprocating transfer apparatus, and a to-be-printed object feeding apparatus is used, and here, the support body B, The encoder 700, the auxiliary control unit SP, and the FF extension cable FFEC are added and modified.

Hereinafter, the manufacturing process of the cylindrical printing apparatus according to Embodiment 2 of the present invention will be described first.

First, a component of the conventional flat printing apparatus 10 is detected, and among the components, the printing unit 400 and the reciprocating transfer apparatus 500 are installed on the support body B.

Next, the to-be-printed object supplying device of the flat printing apparatus 10 corresponding to the main rotating body 100 and the driving unit 300 is rotated 180 degrees in the left and right direction and installed below the printing unit 400.

Next, the driven rotating body 200 is installed in parallel with the to-be-printed object supply device of the flat printing apparatus 10.

Next, an FF extension cable (FFEC) for connecting the FF cable (FFC) connected to the printing unit 400 and the FF cable connector (FFCC) provided in the central control unit MP is installed.

Next, the substrate rotating sensor 100 of the flat printing apparatus 10 is removed, and the encoder 700 and the auxiliary control unit SP for compensating the operation of the substrate detecting sensor unit are respectively driven by the main rotating body 100 and the central control unit. Connect to (MP).

As a result, the cylindrical printing apparatus according to the second embodiment of the present invention, compared with the cylindrical printing apparatus according to the first embodiment of the present invention, the FF extension cable (FFEC), the encoder 700 and the auxiliary control unit Similar except for (SP). Therefore, the following description will focus on the FF extension cable (FFEC), the encoder 700, and the auxiliary control unit SP according to the second embodiment of the present invention.

The FF extension cable (FFEC) connects the FF cable (FFC) connected to the printing unit 400 and the FF cable connector (FFCC) provided in the main PCB (MP). The FF extension cable (FFEC) is composed of a cable of the same material as the FF cable (FFC).

In the conventional flat printing apparatus 10, the FF cable (FFC) and the FF cable connector (FFCC) are directly connected. However, when using the to-be-printed object supply device of the conventional flat printing apparatus 10 as the main rotating body 100 and the driving unit 300, there is a problem that the printing progress direction is reversed.

The reason why such a problem occurs is as follows. Since the to-be-printed object of the conventional flat printing apparatus 10 is a flat surface, the rotation direction of the to-be-printed object supply device is the printing progress direction with respect to the printing unit 400. By the way, when the to-be-printed object is rotated by using the to-be-printed object supplying device, the to-be-printed object is cylindrical, so that it rotates in a direction opposite to the rotation direction of the main rotating body 100. Therefore, the to-be-printed object plays a role of changing the printing progress direction of the to-be-printed object supply device. As a result, the rotation direction of the to-be-printed object supply device and the printing progress direction with respect to the printing unit 400 are reversed.

Therefore, the rotation direction of the to-be-printed object supply device is equal to the printing progress direction with respect to the printing unit 400 only when the to-be-printed object supply device corresponding to the main rotating body 100 is rotated 180 degrees. Therefore, as shown in FIG. 4, the distance between the FF cable (FFC) and the central control unit (MP) is far from the need for the FF extension cable (FFEC).

The encoder 700 detects a print preparation operation of the main rotating body 100. The to-be-printed object supplying apparatus of the conventional flat printing apparatus corresponding to the main rotating body 100 and the driving unit 300 is set to repeat the forward and reverse rotation quickly so that there is no paper jam before printing starts. Corresponds to the print preparation operation.

The auxiliary control unit SP receives a detection signal of the encoder 700 and generates a compensation signal for compensating for the signal of the to-be-printed sensor. This compensation signal is input to the central control unit MP to start normal printing.

That is, the conventional flat printing apparatus 10 starts a print job after receiving the signal of the to-be-printed sensor after the print preparation operation. Since the to-be-printed sensor has been removed, the signal of the to-be-printed sensor is compensated for. The encoder 700 and the auxiliary control unit SP for giving is necessary.

The cylindrical printing apparatus according to Embodiment 2 of the present invention may include the supply sensor 600. In this case, the supply sensor 600 detects whether the to-be-printed object is supplied and transmits a detection signal to the auxiliary control unit SP, and the auxiliary control unit SP is the encoder 700 and the supply sensor 600. When the detection signal is received, the compensation signal is generated. Therefore, in the cylindrical printing apparatus according to the second embodiment of the present invention, when the print preparation operation and the supply of the to-be-printed object are both detected by the encoder 700, the normal printing operation is performed. Begins.

Hereinafter, the cylindrical printing apparatus according to Embodiment 3 of the present invention will be described in detail with reference to FIGS. 6 and 7. The cylindrical printing apparatus according to the third embodiment of the present invention, except for the lifting device 800, the guide portion 900, and the sensor 990, compared to the cylindrical printing apparatus according to the first embodiment of the present invention Is similar. Therefore, hereinafter, the lifting device 800, the guide 900 and the sensor 990 of the cylindrical printing apparatus according to the third embodiment of the present invention will be described.

The elevating device 800 is installed on the support body B, and elevates the printing unit 400 and the reciprocating transfer device 500 to print the printed matter of various diameter sizes. As shown in Fig. 6, in the cylindrical printing apparatus of the third embodiment of the present invention, the lifting device 800 is provided with a pair of both ends of the supporting body B. The elevating apparatus 800 elevates the printing unit 400 and the reciprocating conveying apparatus 500 by elevating a connection body CB on which the reciprocating conveying apparatus 500 is installed. The elevating device includes a rack gear 810, a pinion gear 820, and a elevating motor 830.

The rack gear 810 is coupled to the connecting body (CB), it is integral with the reciprocating transfer device (500). The pinion gear 820 is provided to mesh with the rack gear. The lifting motor 830 is installed on the support body B to drive the pinion gear. Therefore, the printing unit 400, the reciprocating transfer device 500, and the connecting body (CB) are integral with each other, so that the rack and pinion gears (810, 820) driven by the lifting motor (830). Is lifted by.

In the cylindrical printing apparatus according to the third embodiment of the present invention, the elevating device 800 is provided to elevate the printing unit 400 and the reciprocating transfer device 500, but the main and driven rotary bodies 100 , 200) and the driving unit 300 may be provided to elevate.

The guide unit 900 guides the printing unit 400 and the reciprocating transportation device 500 to be elevated in a stable state. The guide portion 900 is composed of a guide protrusion 910 provided in any one of the support body (B) and the connecting body (CB), and a guide groove (920) provided on the other.

The sensor 990 detects a distance between the printing unit 400 and the surface of the to-be-printed object. The sensor 990 transmits a distance measurement value to the central control unit MP, and the central control unit MP operates the elevating device 800 such that the measurement value is a predetermined distance. The predetermined distance is a distance stored in the central control unit MP so as to realize the best print quality in consideration of the ink jetting characteristics of the printing unit 400 and the surface characteristics of the printed object.

Hereinafter, the operation of the cylindrical printing apparatus according to Embodiment 3 of the present invention will be described.

When first receiving a printing command, the sensor 990 detects the distance between the printing unit 400 and the printed matter. The elevating device 800 is raised above the top of the guide portion 900 of the support body B such that the distance measurement value of the sensor 990 becomes a predetermined distance under the control of the central controller MP. Lower the connecting body (CB).

At this time, when the measured value does not become a predetermined distance until the connection body (CB) is lowered to the lowermost end of the guide portion 900 of the support body (B), the cylindrical printing apparatus sends an error signal to the computer. Send and stop work. When the measured value of the sensor 990 is a predetermined distance, the lifting device 800 is stopped, the connection body (CB) is fixed to the support body (B).

Next, the printing unit 400 performs cleaning by itself, and then starts printing.

Since the subsequent operation is the same as in the first embodiment, description thereof will be omitted. However, in the cylindrical printing apparatus according to the third embodiment of the present invention, when the printing is finished, the elevating apparatus 800 to raise the connecting body CB to the uppermost end of the guide portion 900 of the supporting body B. There is a difference in operating.

The cylindrical printing apparatus according to Embodiment 3 of the present invention may be more simply implemented in a manner in which a user directly operates the elevating apparatus 800.

The to-be-printed object of the cylindrical printing apparatus of the present invention can be used without limitation an article having a cylindrical shape. The cylindrical printing apparatus of the present invention can be particularly useful for a to-be-printed object which cannot be constructed by assembling a thin plate. For example, the cylindrical printing apparatus of the present invention is particularly useful when printing on cylindrical to-be-produced products in the form of finished products, such as candles.

As described above, the cylindrical printing apparatus of the present invention, by printing directly on the surface of the cylindrical to-be-printed, to eliminate the trouble of printing on a film and attaching the film to the cylindrical to-be-printed surface, and after printing on a thin plate Direct printing is possible even on a to-be-printed object that is difficult to form.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and changes are possible within the technical spirit of the present invention, and such modifications and modifications belong to the appended claims. .

Claims (8)

A main rotating body for supporting and rotating a cylindrical to-be-printed object; A driven rotating body installed in parallel with the main rotating body to have a predetermined interval and supporting the to-be-printed object; A driving unit for driving the main rotating body; A printing unit for injecting ink onto a surface of the to-be-printed object; And And a reciprocating transfer device for reciprocating the printing unit in parallel in the longitudinal direction of the to-be-printed object. And a cylindrical printing device for printing the surface of the to-be-printed object rotated by the rotation of the main rotating body to the printing unit. The method of claim 1, The main rotating body, A main shaft installed to support the to-be-printed object in a longitudinal direction and connected to the driving unit; And And a main roller unit which is provided on an outer circumferential surface of the main shaft as an elastic body for contact with the to-be-printed object. The driven rotating body, A driven shaft which is installed to support the to-be-printed object in the longitudinal direction together with the main shaft; And A driven roller portion provided on an outer circumferential surface of the driven shaft as an elastic body for contact with the to-be-printed object; The cylindrical printing device comprising a. The method of claim 1, The reciprocating transfer device, A support member disposed parallel to the longitudinal direction of the to-be-printed object; A belt coupled to the printing unit and having a non-slip groove on an inner circumferential surface thereof; Main and driven pulleys which engage with the inner circumferential surface of the belt and are provided with anti-slip protrusions engaged with the anti-slip grooves on the outer circumferential surface; And A transfer motor for driving the main pulley; The cylindrical printing device comprising a. The method according to any one of claims 1 to 3, Further comprising; a supply sensor for detecting whether the to-be-printed object is supplied before printing starts, And the printing start control unit according to the detection result of the supply of the to-be-printed object by the supply sensor. The method of claim 1, Further comprising; an encoder for detecting a print preparation operation of the main rotating body; The cylindrical printing apparatus, characterized in that for controlling the start of printing in accordance with the detection result of the encoder. The method of claim 1, An elevating device capable of elevating the printing unit and the reciprocating transfer device to print the to-be-printed material having various diameter sizes; And A guide unit for guiding the printing unit and the reciprocating transfer device to move up and down; The cylindrical printing apparatus further comprises. The method of claim 6, The lifting device, A rack gear coupled to the reciprocating transfer device; A pinion gear meshing with the rack gear; And And a lifting motor for driving the pinion gear. The method according to claim 6 or 7, The printing unit, A sensor for sensing the distance between the printing unit and the surface of the to-be-printed; And the lifting device is automatically operated according to the measured value of the sensor to adjust the distance between the printing unit and the surface of the to-be-printed object to a predetermined distance.

Images