JP3181539B2 - Inkjet printing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cloth transport mechanism of a printing apparatus using an ink jet system, and more particularly, to a printing apparatus employing a plateless printing system of an ink jet system. The present invention relates to a fabric transport mechanism used when simultaneously performing a textile printing process.

[0002]

2. Description of the Related Art Conventionally, a screen printing method, a roller printing method, a rotary screen printing method, a transfer printing method, and the like have been used as a method of printing a design on a cloth. It is necessary to prepare engraving rollers, transfer paper, and the like, and the production of these screen frames, engraving rollers, and transfer paper is quite expensive, so that it is uneconomical to produce a considerable number of lots. It has the drawback that it cannot respond quickly to diversification, and in order to solve these drawbacks, a technology has been developed that reads samples with a scanner, performs image processing with a computer, and prints the results with an inkjet method. It has been.

An outline of a printing apparatus using an ink jet system will be described with reference to FIG.
Goes through the following route. That is, the cloth (1) sent out from the sending unit (3) is spread in the spread state and the A dust removing roller (1).
8), B dust removing roller (19), A guide roller (2)
0), and sequentially reaches the B guide roller (22) via the bend bar (21).

Next, the cloth (1) is adhered to an endless belt (17) running on a closed loop-shaped circulation path, and the printing area mainly composed of the print unit (2) is accompanied by the running of the endless belt (17). After passing through (23), printing is performed in the printing area (23). Thereafter, the printed fabric (1) is put on the endless belt (1).
7), and is wound up by the winding section (4) via the C guide roller (24) and the D guide roller (25).

[0005] The endless belt (17) used in this printing apparatus is a metal cloth transport belt, which is manufactured mainly by nickel and is plated by a plating method. It has a function of high positioning accuracy. On the surface, an acrylic permanent type pressure-sensitive adhesive resin (for example, Liquitac K-6)
(Manufactured by Dairiki Co., Ltd.) is applied to a thickness of about 50 μm, and the cloth (1) is removably adhered to the surface thereof. And
The endless belt (17) includes a drive motor (26)
Roller (27) and two driven rollers (2
8) and (29) are circulated in the direction of the arrow in the substantially right-angled triangular traveling path, and the traveling path between the driving roller (27) located at the top of the traveling path and the driven roller (29) immediately below it. Is opposed to the print unit (2).

Below the print unit (2) in the printing area (23), a sticking roller (30) for sticking the cloth (1) to the endless belt (17) and an air cylinder (31) for operating the sticking roller are mounted. When the air cylinder (31) is driven, a lever (32) connected thereto is operated to rotate the lever (32) and the attaching roller (30) around the support shaft (33). Cloth (1) with endless belt (17)
Paste in.

[0007] The printing on the cloth (1) is as follows.
The operation is performed by intermittent driving of the endless belt (17) by the drive motor (26) and ink ejection from the print unit (2). That is, in the printing apparatus, when the endless belt (17) is intermittently driven by the drive motor (26), the attaching roller (30) presses the cloth (1) as described above, and the cloth (1) is moved to the endless belt (17). ) Causes intermittent feed.

At the same time, digital image data is sent from the data processor (34) and the print unit (2) receives and processes it. And the control device (3
The drive motor (26) is controlled by 5), and when the endless belt (17) and the fabric (1) stop, the timer (36) is driven by the signal. After the elapse of the set time of the timer (36), the control device (35) controls the air cylinder (31) so that the sticking roller (30) retreats from the endless belt (17) and moves away from the cloth (1). Become.

Next, after the endless belt (17) stops, the print unit (2) receives a signal from the control device (35), and after processing the digital image, the carriage is moved based on the signal from the control device (35) based on the signal from the control device (35). 37, the nozzle head (38) travels in the width direction of the cloth (1), and the ink flows in the nozzle head (3).
8), and the fabric (1) is printed.

Further, after the nozzle head (38) runs, the control device (35) receives a signal of the print unit (2), and based on the signal, the control device (35) controls the air cylinder (31) to attach the cylinder. Roller (3
0) advances toward the endless belt (17) and presses the fabric (1). Then, the drive motor (26) is controlled by the control device (35), the endless belt (17) is driven again, and the cloth (1) is intermittently fed by the endless belt (17). By repeating such a process sequentially and alternately, the textile (1) is printed.

[0011]

By the way, Japanese clothing is different from Western clothing in that the pattern must match at the seam at the time of tailoring, but this is realized and mechanically and continuously. It is difficult to perform the printing with a conventional printing apparatus. For example, in order to continuously print a kimono kimono scale, 12 to 13 m must be treated as one repeat, and it has been impossible to carry out this with a conventional screen printing apparatus. For this reason, the printing process for kimono kimono has conventionally been mainly hand-printed.
m) is applied in one or two rows and printing is performed sequentially.

On the other hand, the above-mentioned printing apparatus using the ink jet system is a substantially plateless system, and as described in detail in the prior art, a long printing of 12 to 13 m per repeat can be performed by flowing data. It is possible and suitable for printing such kimono dressing scales.

[0013] However, there is no technical difficulty if one scale is continuously printed by the printing apparatus. However, such a production system incurs high costs, and at the stage of actual production, it is necessary to simultaneously print a plurality of (two to four) scales. However, setting a plurality of scales at predetermined positions and equalizing the tension applied to each scale has been a very difficult problem.

More specifically, as shown in FIG. 7, the delivery section (3) of the conventional ink jet printing apparatus includes an induction motor (16) rotating at a low speed and a powder clutch (15) which is a kind of centrifugal clutch. ), The driving roller (5) is rotated, and the roll-shaped cloth (1) wound around the cloth holding roller (6) fixed to the driving roller (5) is spread in a wide or parallel width. The cloth is sent out as (1), a uniform tension is applied, and the cloth is kept in a tensioned state. The drive roller (5) is rotated by the (16) and the powder clutch (15), and is wound around the cloth holding roller (6) fixed to the drive roller (5).

However, in the case of the above-described apparatus configuration, the cloth holding roller (6) fixed to the driving roller (5) is provided with the structure shown in FIG.
When a plurality of narrow fabrics (1) for knitting are set as shown in (1), the intensity of the tension is generated by the knitting and becomes uneven, and when the cloth is attached to the endless belt (17), the tension is lower than that of the other. There is a problem that wrinkles are generated on the weak and loose fabric (1), which causes a reduction in quality and productivity.

The present invention has been made in view of the above circumstances, and has as its object to solve the above-described problems in transporting a plurality of fabrics when the fabrics are simultaneously conveyed by an inkjet printing apparatus. is there.

[0017]

To achieve the above object, the present invention has the following arrangement. That is, the first invention is
As shown in FIG. 1, a print unit (2) for printing by discharging ink onto the fabric (1), a sending unit (3) for sending the fabric (1) held in a roll shape to the print unit (2) side, In the ink jet printing apparatus provided with a winding section (4) for winding the fabric (1) printed by the printing unit (2) into a roll, the sending section (3) and / or the winding section (4) may include: As shown in FIG. 2, a drive roller (5) to which torque is applied by a drive source and a plurality of cloth holding rollers (6) having an inner diameter larger than the outer diameter of the drive roller (5) are connected to the drive roller (5). ) And a torque transmission control means for transmitting or interrupting torque from the drive roller (5) to each of the fabric holding rollers (6).

According to a second invention, in the first invention, the torque transmission control means is a pressure contact means provided so as to be able to protrude and retract from the outer peripheral surface of the drive roller (5). When the pressing means protrudes from the outer peripheral surface of the drive roller (5), it comes into contact with the inner peripheral surface of the fabric holding roller (6), whereby torque is transmitted to the fabric holding roller (6). Is what it is.

More specifically, as shown in FIG. 3, the pressure contact means (7) is provided inside the drive roller (5), and is appropriately operated so that the pressure contact means (7) is moved from the outer peripheral surface of the drive roller (5). Of the cloth holding roller (6) loosely fitted to the driving roller (5) when the pressing means (7) is protruding. Since a part of the inner peripheral surface comes into contact with the inner peripheral surface, the torque applied from the driving source to the driving roller (5) is transmitted to the cloth holding roller (6) by the contact friction.

In FIG. 3, a strong tension A is generated in the conveyed cloth (1) and pulls on the cloth holding roller (6).
When a force equal to or greater than the static friction force of the pressing means (7) is applied thereto, the pressing means (7) and the cloth holding roller (6), that is, the driving roller (5) and the cloth holding roller (6)
, A relative motion occurs, and the tension A of the cloth (1) is released.

According to a third aspect of the present invention, in the first aspect, the torque transmission control means in the delivery section (3) is a one-way clutch, and is provided from a drive source to the drive roller (5). When a force equal to or greater than the applied torque is applied to the fabric holding roller (6), the transmission of torque from the driving roller (5) to the fabric holding roller (6) is interrupted by the one-way clutch. At the time, torque is transmitted from the driving roller (5) to the cloth holding roller (6).

The one-way clutch is configured such that when transmitting torque from the driving section to the driven section, the torque is transmitted only in one rotation direction and the transmission of torque in the opposite direction is interrupted. For example, as shown in FIG. 4, a concave portion (8) is provided on the outer peripheral surface of the driving roller (5), and a cylindrical roller (9) is arranged between the concave portion (8) and the cloth holding roller (6) loosely fitted thereto. The surface where the concave portion (8) provided in the drive roller (5) is in contact with the cylindrical roller (9) is slightly inclined with respect to the concentric circle with the drive roller (5) so that the surface is deeper than the shallow concave portion (10). One formed on the cam surface (12) where the depth of the concave portion of the concave portion (11) is increased.

In the example using the cylindrical roller (9), as shown in FIG. 4, when the torque B is applied to the drive roller (5), the normal state, that is, the cloth holding roller (6)
In a state where the cylindrical roller (9) is driven by the driving roller (5) rotated by the torque B, the cylindrical roller (9) moves from the deep concave portion (11) to the shallow concave portion (10) along the cam surface (12). Therefore, the cylindrical roller (9) acts as a wedge, so that both the driving roller (5) and the fabric holding roller (6) rotate at substantially the same angular velocity as one unit.

However, when the tension of the cloth (1) being sent out is increased and the tensile force C acts on the cloth holding roller (6) and the tensile force C> torque B, the cylindrical roller (9) is Guided by the holding roller (6), the shallow recess (1)
0) to the deep concave portion (11), so that both the driving roller (5) and the fabric holding roller (6) are free. Therefore, the cloth holding roller (6) can rotate freely relative to the driving roller (5), and is rotated by the tensile force C having a torque greater than or equal to the torque B to generate the cloth (1). The tension that has been released is released, and the normal state, that is, the tensile force C ≦ torque B, is satisfied, and both the drive roller (5) and the fabric holding roller (6) rotate together as described above. .

Next, a fourth invention is a combination of the second invention and the third invention, that is, the torque transmission control means extends and retracts from the outer peripheral surface of the drive roller (5). And an intermediate roller provided with a one-way clutch and having an inner diameter larger than the outer diameter of the drive roller (5).

Specifically, as shown in FIG. 5, a part of the pressure contact means (7) is provided so as to be able to freely protrude and retract from the outer peripheral surface of the drive roller (5). Intermediate roller (14) with one-way clutch (13) described above on the side
And the fabric holding roller (6) is loosely fitted on the outer peripheral side of the drive roller (5) and the intermediate roller (14).

When the torque transmission control means is constituted as in the fourth invention, the pressure of the pressure contact means (7) with respect to the intermediate roller (14) is set to a high pressure in the sending section (3) and substantially. The drive roller (5) and the intermediate roller (14) are integrated, and the one-way clutch (13) provided between the intermediate roller (14) and the cloth holding roller (6) operates as described above. 5) and the intermediate roller (1)
4) It is possible to operate to control transmission or interruption of torque from the two to the fabric holding roller (6), and in the winding section (4), as shown in FIG. ) Becomes opposite to the rotation direction of the drive roller (5), and the cylindrical roller (9) of the one-way clutch (13)
Always moves to the shallow bottom recess (10) side and the intermediate roller (1
4) and the cloth holding roller (6) are substantially integrated, so that the pressure of the pressing means (7) is adjusted so that the driving roller (5) and the intermediate roller (14) can rotate relatively. Is set so that the intermediate roller (14) and the fabric holding roller (6) rotate in the E direction relative to the drive roller (5) when a strong tensile force D equal to or more than a certain value acts. It becomes possible to release unnecessary tension and take up with a certain force.

According to a fifth aspect of the present invention, in the second and fourth aspects, the pressure contact means (7) includes:
Drive roller (5) by increasing or decreasing the supply of fluid
Is configured to be able to protrude and emerge from the outer peripheral surface of the device as appropriate. Specifically, a device that operates the press-contact means (7) by supplying compressed air, oil, or the like from a compressor, a hydraulic pump, or the like is exemplified. Note that, in addition to the above-described configuration that operates by increasing or decreasing the supply amount of the fluid, the press-contact means (7) is physically expanded (or It may be one that can expand and contract.

As described above, the ink jet printing apparatus of the present invention always controls transmission or cutoff of torque so that excessive tension is not applied to each narrow width cloth held by a plurality of cloth holding rollers. Since a strong tension is generated in any one of the plurality of fabrics, the torque transmission control means of the present invention acts to release the tension, and makes the tension of all the fabrics substantially uniform. They will adjust.

That is, since the occurrence of a state in which the tension is weaker than that of other fabrics is suppressed, all of the plurality of fabrics can be stuck to the endless belt with substantially uniform tension, and wrinkles can be reduced. The occurrence will be suppressed.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will now be described with reference to FIGS. 1, 2, 5 and 6. FIG. FIG. 1 is a schematic view showing the entirety of an ink jet printing apparatus according to the present invention, FIG. 2 is an enlarged view of a sending section (3), FIG. 5 is a schematic cross-sectional view of a main part of the sending section (3), and FIG. (4) It is a cross section of an important section.

As shown in FIG. 1, FIG. 2 and FIG. 5, the sending section (3) of the present invention includes a driving roller (5) which receives a torque by an induction motor (16) via a powder clutch (15). An intermediate roller (14) provided with a directional clutch (13) and being in pressure contact with the drive roller (5); and an intermediate roller (14) provided through the one-way clutch (13) and the intermediate roller (14). The fabric (1) is wound around the outer periphery of the fabric holding roller (6) and held.

As shown in FIG. 5, the one-way clutch (13) is provided with a concave portion (8) on the outer peripheral surface of the intermediate roller (14), and is provided between the intermediate roller (14) and the fabric holding roller (6) loosely fitted thereto. A cylindrical roller (9) is arranged in the intermediate roller (1).
The surface where the concave portion (8) provided in 4) and the cylindrical roller (9) are in contact with each other is slightly inclined with respect to the concentric circle with the drive roller (5), so that the deep concave portion (11) is made smaller than the shallow concave portion (10). Using the one formed on the cam surface (12) where the depth of the concave portion is deep,
The pressure contact means (7) is adapted to appropriately supply compressed air from the inside of the drive roller (5) from a compressor (not shown).

The width of the cloth holding roller (6) is formed in correspondence with the width (about 40 to 45 cm) of the cloth (1) for the Japanese style, and the center of the driving roller (5) is adjusted. A plurality (two to four) are loosely fitted in the plurality and are arranged at appropriate intervals.

The above configuration has the same configuration in the winding section (4). However, in the feeding section (3), the air pressure by the compressor is set to a high pressure and the driving roller (5) is substantially set. ) And the intermediate roller (14) are integrated. On the other hand, in the winding section (4), the pressure is set lower than the air pressure in the sending section (3), and the driving roller (5) and the intermediate roller (14) can move relative to each other. It is provided as follows.

In the present apparatus, the tension of the cloth (1) being fed is increased, and the cloth holding roller (6)
When the tensile force B works and the tensile force C> torque B,
The cylindrical roller (9) is moved from the shallow recess (10) to the deep recess (1).
1), so that both the intermediate roller (14) and the fabric holding roller (6) are free. Accordingly, the cloth holding roller (6) can rotate freely relative to the intermediate roller (14), and thus the cloth holding roller (6) is rotated by a force greater than the torque B by the tensile force C, and is generated on the cloth (1). The released tension is released, and the normal state, that is, tensile force C ≦ torque B is satisfied.

Thereafter, the cylindrical roller (9) again moves from the deep concave portion (11) to the shallow concave portion (10), and thus the cylindrical roller (9) acts as a wedge. Both the roller (14) and the fabric holding roller (6) rotate integrally at the same angular velocity, and the fabric (1) is fed out with normal tension.

In this way, the plurality of fabrics (1) having a constant tension are stuck on the endless belt (17), and further supplied to the print unit (2) to be printed. And the fabric after printing (1)
Is to be wound by the winding section (4).

At this time, in the winding section (4) shown in FIG. 6, as described above, the tensile force D of the cloth (1) is opposite to the rotation direction of the driving roller (5), and Since the cylindrical roller (9) of the clutch (13) always moves to the shallow recess (10) side to substantially integrate both the intermediate roller (14) and the cloth holding roller (6), the drive is performed. By setting the pressure of the pressing means (7) so that the roller (5) and the intermediate roller (14) can rotate relatively, when a strong tensile force D exceeding a certain value acts, the intermediate roller (14)
In addition, the cloth holding roller (6) rotates in the direction E relative to the drive roller (5), so that the tensile force D is released and the cloth is wound with a constant force.

[0040]

As described above, according to the ink jet printing apparatus of the present invention, even when a narrow cloth such as a kimono kimono is printed, a plurality of narrow cloths can be uniformly printed. Since it is possible to send out, convey, and wind up with tension, it is possible to prevent wrinkles of the fabric from occurring, and to achieve effects such as improvement in quality, reduction in apparatus trouble, and improvement in productivity.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing the entirety of an inkjet printing apparatus.

FIG. 2 is an explanatory diagram of a transmitting unit according to the present invention.

FIG. 3 is a schematic explanatory view of a transmitting section according to a second invention.

FIG. 4 is a schematic explanatory diagram of a transmitting section according to a third invention.

FIG. 5 is a schematic explanatory diagram of a transmitting section according to a fourth invention.

FIG. 6 is a schematic explanatory view of a winding section according to a fourth invention.

FIG. 7 is an explanatory diagram of a sending section of a conventional ink jet textile printing apparatus.

FIG. 8 is an explanatory diagram of a state in which a plurality of narrow-width cloths are set on a delivery section of a conventional inkjet printing apparatus.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 cloth 2 print unit 3 sending section 4 winding section 5 drive roller 6 cloth holding roller 7 press-contact means 8 concave section 9 cylindrical roller 10 shallow concave section 11 deep concave section 12 cam surface 13 one-way clutch 14 intermediate roller 15 powder clutch 16 induction motor 17 Endless belt 18 A dust removal roller 19 B dust removal roller 20 A guide roller 21 bend bar 22 B guide roller 23 printing area 24 C guide roller 25 D guide roller 26 drive motor 27 drive roller 28 driven roller 29 driven roller 30 sticking roller 31 Air cylinder 32 Lever 33 Support shaft 34 Data processor 35 Control device 36 Timer 37 Travel axis 38 Nozzle head

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) D06P 5/00 D06P 7/00 B41J 2/01 F16D 41/06

Claims (5)

(57) [Claims] 1. A printing unit that discharges ink onto a fabric for printing, a sending unit that sends out the fabric held in a roll shape to the printing unit side, and a winding unit that winds the fabric printed by the printing unit in a roll shape. An ink jet printing apparatus comprising: a drive roller to which a torque is applied by a drive source to the sending section and / or the winding section; and a plurality of cloth holding rollers having an inner diameter larger than an outer diameter of the drive roller. An ink jet printing apparatus comprising: a torque transmission control means for loosely fitting a drive roller and transmitting or interrupting torque from the drive roller to each of the fabric holding rollers. 2. The method according to claim 1, wherein the torque transmission control means is a pressure contact means provided so as to be able to protrude and retract from an outer peripheral surface of the drive roller. 2. The ink jet printing apparatus according to claim 1, wherein a torque is transmitted to the cloth holding roller by contacting the peripheral surface. 3. The one-way clutch according to claim 1, wherein the torque transmission control means in the sending unit is a one-way clutch, and when a force equal to or more than the torque applied from the drive source to the drive roller is applied to the fabric holding roller, 2. The ink jet printing apparatus according to claim 1, wherein transmission of torque from the driving roller to the cloth holding roller is interrupted. 4. A cylindrical cylinder having a pressure contact means provided so as to be able to protrude and retract from an outer peripheral surface of a drive roller, and a one-way clutch and having an inner diameter larger than an outer diameter of the drive roller. 2. An ink jet printing apparatus according to claim 1, comprising an intermediate roller. 5. The device according to claim 2, wherein the pressure contact means is provided so as to be able to protrude and retract from the outer peripheral surface of the drive roller by increasing and decreasing the supply amount of the fluid.
The ink-jet printing apparatus as described in the above.