JP6914795B2 - Printing equipment using a cylindrical printing jig and a cylindrical printing jig - Google Patents

Description

The present invention relates to a cylindrical printing jig and a printing apparatus using a cylindrical printing jig.

In printing a cylinder, a mechanism has been proposed that uses a link mechanism or a slide mechanism to adjust the position so that the center position of the cylinder is under the print head even if the size of the cylinder changes (see, for example, Patent Document 1). ).
The above device has a mechanism in which a cylindrical object is rotated by a drive roller provided on one side. Further, a device for rotating a cylindrical object by converting the movement of the table into a force in the rotation direction has also been proposed (see, for example, Patent Document 2). Also in this device, a cylindrical object is rotated by a roller provided on one side.

Japanese Unexamined Patent Publication No. 8-207265 WO2017-0860007

The mechanism described in Patent Document 1 that rotates a cylindrical object by a drive roller provided on one side has a weak transmission of a rotational force to the cylindrical object, and also requires a mechanism such as a motor that gives a rotational force.
The device described in Patent Document 2 does not require a dedicated drive mechanism for rotating a cylindrical object, but it also has a structure in which the cylindrical object is placed on a roller, and the cylindrical object is rotated only by a roller on one side. It is more reliable to apply the rotational force to the cylindrical object by using the rollers on both sides together than to apply the rotational force to the cylindrical object only by the rollers provided on one side. In a mechanism as described in Patent Document 1, if motors are provided on both rollers, it becomes expensive. In addition, it is ideal that the roller side moves so that the center of the cylinder is positioned under the print head according to the diameter of the cylinder to be printed, but in that case, it is necessary to move the drive shaft of the motor etc. together. The structure is also complicated.
In printing that requires transport accuracy of printed matter such as inkjet printing, it is necessary to reliably rotate the cylindrical object without slipping, and when a structure on which the cylindrical object is placed is used, the cylindrical object is light. The effects of slipping are also likely to occur.
Therefore, the present invention reliably drives (rotates) printed matter such as a cylinder by a mechanism that can apply a driving force to the rollers on both sides without providing a drive source such as a motor and can easily move the rollers on both sides. ), It is an object of the present invention to provide a printing apparatus using a cylindrical printing jig.

In order to achieve the above object, the present invention supports a cylinder that can be detachably fixed to the body of a table-moving printing device, a substrate that is connected to the holder so that it can be moved in parallel in the vertical direction, and a cylinder. It is used in a table-moving printing device provided with a pair of cylindrical support rollers provided on the substrates facing each other at a predetermined interval, and a power conversion mechanism for converting the movement of the table of the printing device into rotary motion. It is a cylindrical printing jig, and one of the pair of cylindrical support rollers is configured to be rotated by using the power of the power conversion mechanism, and an endless timing belt is rotatably arranged on the substrate. , The timing pulley provided on the shaft portion of the pair of cylindrical support rollers is meshed with the timing belt, and the pair of cylindrical support rollers are supported in synchronization with the rotation of one of the pair of cylindrical support rollers. The other cylindrical support roller in the roller is made to rotate .
Further, the present invention is characterized in that the power conversion mechanism is rotatably connected to the substrate and is configured by a power conversion roller that comes into contact with the table by the weight of the substrate.
The present invention is also characterized in that the power conversion roller is one of the pair of cylindrical support rollers.
Further, in the present invention, the power conversion roller is composed of a drive roller provided on the substrate, and the drive roller is connected to one of the pair of cylindrical support rollers via a rotation transmission mechanism. It is characterized by.
Further, in the present invention, a pair of slidable mounting bodies is provided on the substrate, and the driving roller and one cylindrical support roller among the pair of cylindrical support rollers are rotatably supported on one mounting body, and the other. The attachment body is provided with a locking mechanism that rotatably supports the other cylindrical support roller in the pair of cylindrical support rollers and detachably locks the pair of attachment bodies to the substrate. It is a feature.
Further, the present invention is characterized in that the locking mechanism is a step type in which a plurality of locking positions are provided on a support surface that supports the mounting body of the substrate with reference to a set origin.
Further, the present invention is characterized in that the locking mechanism is a stepless type in which the mounting body is slid with reference to a set origin and locked at an arbitrary position.
The present invention also includes a machine, a table, a print head movably supported in a plane parallel to the table in a direction crossing the table , and the table orthogonal to the moving direction of the print head. It is provided with a sub-scanning drive mechanism that movably supports the table, a table elevating drive mechanism that drives the table in the elevating direction, and a removable cylindrical printing jig, and the table is moved in one direction under the control of a controller. A table-moving printing device that moves, moves the printing head in a direction across the table, and prints on a printing medium on the table. The cylindrical printing jig is a machine of the table-moving printing device. A pair of a holder that can be detachably fixed to the holder, a base that is connected to the holder so as to be movable in parallel in the vertical direction, and a pair of bases that face each other with a predetermined interval for supporting a cylinder. A cylindrical support roller and a power conversion mechanism that converts the movement of the table of the printing device into a rotary motion are provided, and one of the pair of cylindrical support rollers is configured to be rotated by using the power of the power conversion mechanism. , An endless timing belt is rotatably arranged on the substrate, and a timing pulley provided on a shaft portion of the pair of support rollers is meshed with the timing belt, and one of the pair of cylindrical support rollers. It is characterized in that the other cylindrical support roller in the pair of cylindrical support rollers is rotated in synchronization with the rotation of the cylindrical support rollers.

When the structure of this case is used, a special mechanism such as a motor for rotating the cylinder is not required, and a rotational force can be applied to the cylinder by both of the pair of cylinder support rollers, so that the cylinder can be rotated with high accuracy for printing. It is possible to obtain good printing results even for heavy cylinders and light cylinders (low adhesion to rollers).
Further, the cylinder support roller can be easily moved according to the diameter of the cylinder (printing medium).

It is an external view of the cylinder printing jig. It is explanatory drawing of the cylinder printing jig. It is sectional drawing of a part of a cylinder printing jig. It is an external view of a printing apparatus. It is an external view of the cylinder printing jig. It is a cross-sectional view of a part of a cylinder printing jig.

Hereinafter, the embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 4 shows an explanatory view of the appearance of the inkjet printer (printing apparatus) 2 in a state where the cylindrical printing jig 4 is attached.
A head guide rail (not shown) that guides the inkjet type print head 8 in the main scanning direction (Y-axis direction) is erected on the body 6 of the printer 2. The print head 8 is integrally formed with the head carriage, and the head carriage is movably connected to the head guide rail.

A table 10 is provided on the machine body 6 of the printer 2, and the table 10 is attached to an X-axis moving body (not shown) that can move in the front-rear direction of the machine body 6, that is, in the sub-scanning direction (X-axis direction), and an elevating mechanism (not shown). ) Is supported. The X-axis moving body is movably attached along an X-axis guide (not shown) arranged on the machine body 6, and is configured to move in the X-axis direction under the control of a controller.

The machine body 6 of the printer 2 is provided with an automatic table elevating control mechanism so that the height of the table 10 can be automatically controlled. Further, the machine body 6 of the printer 2 is provided with a table elevating operation handle 11, and by operating this handle, the height of the table 10 can be changed while the table surface is kept parallel to the floor surface. The distance between the print object and the inkjet print head 8 can be manually adjusted with respect to the height of each object.

The printer 2 is used for printing on a medium having a normal flat surface when the cylindrical printing jig 4 is removed. The media having a flat surface can be used as long as it can be conveyed regardless of its shape, from a thin sheet-like medium to a thick plate-like medium. In printing on media, the media is set on the table 10, and the print head 8 is reciprocated in the Y-axis direction along the head guide rail while moving the table 10 in the X-axis direction under the control of the controller, and the print head is printed. The ultraviolet curable ink is ejected from the ink ejection portion of No. 8 to the printing execution area on the top of the medium (printing medium), and printing is performed on the printing execution area of the media.

When printing on a medium having a certain thickness, the table 10 is lowered and the distance between the print head 8 and the medium is automatically adjusted to perform printing. The head carriage is equipped with an ultraviolet irradiation device 13 adjacent to the print head 8, and is irradiated with ultraviolet rays after ink is ejected onto the printing surface of the medium during printing. It should be noted that the ink may be used for the required purpose in combination with the object to be printed, and is not limited to the ultraviolet curable ink.

As shown in FIG. 1, the cylindrical printing jig 4 includes a holding body 12 made of a rail-shaped member that is long in one direction, and a base 14 and a cover 16 for attaching various parts. Clamp mounting pieces 18 and 20 for detachably screwing and fixing the holding body 12 to the mounting portion formed on the upper edge of the machine body 6 of the printer 2 are provided at both ends of the holding body 12. .. Projecting pieces 22 and 24 are integrally formed in the vicinity of both ends of the holding body 12, and shaft holes 26 and 28 are formed in the projecting pieces 22 and 24.

Elevating guide portions 30 and 32 are integrally provided on both sides of the front portion of the substrate 14, and elongated holes 34 and 36 extending in a direction perpendicular to the mounting surface of the table 10 are formed therein. The shaft portions of the bolts 38 and 40 are slidably fitted and arranged in the elongated holes 34 and 36, and the screw portions of the bolts 38 and 40 are provided in the plate nuts 44 arranged in the frame portions 42 of the elevating guide portions 30 and 32. It is screwed in.

A tubular body 48 is fitted and inserted into the shaft portion of the bolts 38 and 40, and the shaft portion is fitted and inserted into the shaft holes 26 and 28. The bolts 38 and 40 whose shafts are slidably fitted into the elongated holes 24 and 26 and the plate nuts 44 and 46 whose movement direction is restricted by the frame 42 are used to place the base 14 on the mounting surface of the table 10. It constitutes an elevating connection mechanism that connects to a connecting body 12 that can be translated in a direction perpendicular to the mounting surface of the table 10 in a horizontal state.

A pair of mounting bodies 52, 54 are slidably arranged in the front-rear direction on the rear portion of the bottom plate 50 of the base 14, and a drive roller 56 composed of two rollers is provided between the frame plates of one mounting body 52. A shaft 62 provided with a media drive roller 60 composed of a shaft 58 and 12 rollers is rotatably hung. A shaft 66 provided with a media driven roller 64 composed of 12 rollers is rotatably hung between the frame plates of the other mounting body 54.

The sliding direction of the base 14 of the mounting bodies 52 and 54 on the bottom plate 50 is regulated in the front-rear direction of the base 14 by the side frame portions 68 and 70 of the base 14. Nuts 72 are fixed to the flat plates of the mounting bodies 52 and 54 at predetermined intervals, and index plungers 74, 76, 78 and 80 are inserted and arranged in the pipes held by the nuts 72. There is. Index holes 82 for the plunger are formed in the bottom plate 50 of the substrate 14 for each of the index plungers 74, 76, 78, and 80.

The arrangement of the index holes 82 is set according to the distance between the media drive roller 60 corresponding to the size of the cylinder 106 and the facing position of the media driven roller 64, and in the present embodiment, the distance between the rollers 60 and 64 is set in two steps. Index holes 82 are provided symmetrically in the front-rear direction with reference to the origin set between the rollers 60 and 64 at positions that can be changed.

The amount of movement for changing the roller pitch does not have to be stepwise, and may be changed steplessly. The shafts 58, 62, 66 are arranged in parallel with each other, and the rollers 60, 64 are set to have the same diameter. Timing belt pulleys 84 and 86 are rotatably attached to the side portions of the substrate 14 at predetermined intervals in the front-rear direction, and an endless timing belt 88 is hung between the pulleys 84 and 86. Timing belt pulleys (toothed pulleys) 90 and 92 having the same diameter as the rollers 60 and 64 are fixedly attached to each end of the shafts 66 and 62, and the toothed pulleys 90 and 92 are on one side of the timing belt 88. It meshes with the upper running part.

Toothed pulleys 94 and 96 are fixed to the shaft 58 and the shaft 62, respectively, and an endless timing belt 98 is hung between the pulleys 94 and 96. The drive roller 56 is arranged on the base 14 so that its friction peripheral surface comes into contact with the table 10 of the printer and converts the movement of the machine body 6 of the table 10 in the front-rear direction (secondary operation direction) into a rotary motion. .. The media drive roller 60 is adjusted by the timing belt 98 and pulleys 94 and 96 so that the rotation ratio of the drive roller 56 is the same as the table feed amount and the rotation circumference of the media drive roller 60.

The media driven roller 64 is arranged at a position symmetrical with respect to the origin of the media drive roller 60 and the drawing origin, and the timing pulleys 90 and 92 and the timing belt 88 synchronize the rollers 60 and 64 with each other. It is configured to rotate in the same direction. Auxiliary wheels 100 are rotatably supported at the four corners of the substrate 14. The base 14 is provided with a cover 16. The cover 16 is provided with an opening, and is configured to place a cylinder on the rollers 60 and 64 arranged in the opening. The cover 16 is formed with a slot for arranging the index plungers 74, 76, 78, 80 and a hole for arranging the handle 102 provided on the substrate 14, and the position of the index hole 82 is indicated in the vicinity of the slot. An index display 104 is provided.

In the above configuration, when selecting an appropriate roller pitch according to the diameter of the cylindrical media 106, pull up the knobs of the index plungers 74, 76, 78, 80 and slide the mounting bodies 52, 54 for a large diameter cylinder. Alternatively, the roller pitch can be adjusted in two steps by selecting one of the index holes 82 for a small diameter cylinder and inserting the pins of the index plungers 74, 76, 78, 80 into the selected index holes 82. can. At this time, since the timing belt pulleys 90 and 92 fixed to the roller shafts 62 and 66 are always meshed on the upper side (one side) of the timing belt 88, the two rollers 60 and 64 facing each other even if the roller pitch changes. Can be kept in sync.

The timing belt pulleys 84 and 86 are rotatably supported by the pulley holders, and the pulley holders are attached to the bottom plate 50 of the base 4. The pulley holder that holds the timing belt pulley 84 in each pulley holder is attached to the bottom plate 50 so as to be slidable in the front-rear direction of the base 4. In order for the timing belt 88 and the teeth of the pulleys 90 and 92 to mesh firmly, the timing belt 88 needs to be in a tensioned state. Therefore, the spring 110 provided on the base 14 eliminates the slack of the timing belt 88 in a state where the pulley holder of the pulley 84 is pulled outward, and the pulley holder of the pulley 84 is fixed to the bottom plate 50 with screws. Further, since the roller member 108 is provided between the pulleys 90 and 92 and the pulleys 84 and 86 and the timing belt 88 is passed under the roller member 108, the pulleys 90 and 92 can be reliably moved to any place between the timing belts. Can be brought into contact with the timing belt 88, and by passing under the roller member 108, tension is also given to the timing belt at the same time. When the holding body 12 of the cylindrical printing jig 4 is arranged in front of the machine body 6 of the printer 2, and the clamp mounting pieces 18 and 20 are fixed to the predetermined clamp positions of the machine body 6 with screws, the cylindrical printing jig 4 The base material 14 is placed in parallel on the table 10 by its own weight via the front auxiliary wheel 100 and the drive roller 56, or via the rear auxiliary wheel 100 and the drive roller 56.

When printing a cylinder, the medium 106, which is the printed matter, is placed on the rollers 60 and 64. At this time, the top (or center) of the media 106 is prevented from shifting with respect to the ink ejection path of the print head 8 so that the position of the top of the media 106 or the center of the media 106 does not shift with respect to the ink ejection path of the print head 8 regardless of whether the diameter of the media 106 is large or small. ) Is the same position with respect to the print head 8. To adjust the distance between the surface of the media 106 and the print head 8, select the "table height change menu" on the operation panel of the printer 2 and enter the diameter value of the media into the controller to enter the table height of the printer 2. Set.

During printing, the drive roller 56 and the training wheels 100 in front or behind come into contact with the table 10 due to the weight of the substrate 4. As the table 10 moves in the X-axis direction (sub-scanning direction) indicated by the arrow in FIG. 2, the drive roller 56 rotates due to contact friction with the table 10, whereby the media drive roller 60 rotates. The rotation of the media drive roller 60 causes the cylindrical media 106 to rotate, and the media driven roller 64 rotates in synchronization with the media drive roller 60.

At this time, the rotation of the media drive roller 60 is transmitted to the timing belt 88 via the timing pulley 92, and the rotation of the timing belt 88 is transmitted to the media driven roller 64 via the timing pulley 90 that meshes with the timing pulley 92, and both rollers. Since the 60 and 64 rotate in the same direction in synchronization, both the rollers 60 and 64 can be used to rotate the cylindrical media 106.
In the above embodiment, the drive roller 56 constitutes a power conversion mechanism that converts the movement of the table 10 into a rotary motion, but the media drive roller 60 may also serve as a power conversion drive roller. Further, in the embodiment, the drive roller 56 is provided on only one side, but the drive roller 56 may be provided on the other side.
Further, since the drive roller 56 comes into contact with the table 10 and rotates due to the movement of the table, a member such as rubber that is hard to slip and easily transmits a force is used. The roller 56 can be made of resin, metal, or the like, and may have a structure in which a rotational force is applied by both contacts. Further, since the media driving roller 60 and the media driven roller 64 also give rotation to the cylindrical object, it is preferable to use a relatively non-slip member such as rubber. If the target cylindrical printed matter uses a member that may have an adverse effect such as slippery or dirty surfaces of the media drive roller 60 and the media driven roller 64, the target cylindrical object is not printed. A support member or the like may be temporarily wound around the surface portion and brought into contact with the roller via the support member or the like, and it is not always necessary to directly contact the surface of the cylindrical object to apply a rotational force.

Further, in the above embodiment, the drive roller 56, the toothed pulley 94 fixed to the shaft 58, the toothed pulley 96 fixed to the shaft 62, and the timing belt 98 constitute a rotation transmission mechanism, and particularly the belt and the pulley. It is not limited to the configuration using.
The index plungers 74, 76, 78, 80 and the index holes 82 form a locking mechanism that detachably locks the pair of mounting bodies 52, 54 to the substrate 14, but the present invention is limited to this configuration. Instead, a stepless configuration may be used in which the mounting bodies 52 and 54 are locked at arbitrary positions with reference to the origin.
Although some embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

2 Printer 4 Cylindrical printing jig 6 Machine 8 Printing head 10 Table 11 Table elevating operation handle 12 Holder 13 Ultraviolet irradiation device 14 Base 16 Cover 18 Mounting piece 20 Mounting piece 22 Projection piece 24 Projection piece 26 Shaft hole 28 Shaft hole 30 Elevating guide part 32 Elevating guide part 34 Long hole 36 Long hole 38 Bolt 40 Bolt 42 Frame part 44 Plate nut 46 Plate nut 48 Cylinder 50 Bottom plate 52 Mounting body 54 Mounting body 56 Drive roller 58 Axis 60 Media Drive roller 62 Axis 64 Media Driven roller 66 Shaft 68 Side frame 70 Side frame 72 Nut 74 Index plunger 76 Index plunger 78 Index plunger 80 Index plunger 82 Index hole 84 Pulley 86 Pulley 88 Timing belt 90 Pulley 92 Pulley 94 Pulley 96 Pulley 98 Timing belt 100 Auxiliary wheel 102 Handle 104 Index display 106 Cylindrical media 108 Roller member 110 Spring

Claims (8)

A retainer that can be detachably fixed to the body of a table-movable printing device, a substrate that is connected to the retainer so that it can be moved in parallel in the vertical direction, and the above-mentioned facing each other with a predetermined interval for supporting a cylinder. a pair of cylindrical support rollers provided on the base body, a cylindrical printing jig used the movement of the printing device table to table moving type printing apparatus that includes a power conversion mechanism for converting the rotational movement, the pair One of the cylindrical support rollers of the above is configured to be rotated by using the power of the power conversion mechanism, an endless timing belt is rotatably arranged on the substrate, and the pair of cylindrical support rollers are placed on the timing belt. The timing pulleys provided on the shaft portion of the above are meshed with each other, and the other cylindrical support roller in the pair of cylindrical support rollers rotates in synchronization with the rotation of one cylindrical support roller in the pair of cylindrical support rollers. A cylinder printing jig characterized by the fact that it is designed to be used. The cylindrical printing jig according to claim 1, wherein the power conversion mechanism is rotatably connected to the substrate and is configured by a power conversion roller that contacts the table by the weight of the substrate. The cylindrical printing jig according to claim 2, wherein the power conversion roller is one of the pair of cylindrical support rollers. The claim is characterized in that the power conversion roller is composed of a drive roller provided on the substrate, and the drive roller is connected to one of the pair of cylindrical support rollers via a rotation transmission mechanism. Item 2. The cylindrical printing jig according to Item 2. A pair of slidable mounting bodies is provided on the substrate, the driving roller and one cylindrical support roller among the pair of cylindrical support rollers are rotatably supported on one mounting body, and the pair is supported on the other mounting body. The other of the cylindrical support rollers of the above is rotatably supported, and the base is provided with a locking mechanism for detachably locking the pair of attachments to the base. The cylinder printing jig according to 4. The cylindrical printing according to claim 5, wherein the locking mechanism is a step type in which a plurality of locking positions are provided on a support surface that supports the mounting body of the substrate with reference to a set origin. jig. The cylindrical printing jig according to claim 5, wherein the locking mechanism is a stepless type in which the mounting body is slid with reference to a set origin and locked at an arbitrary position. A machine, a table, a print head supported so as to be movable in a direction crossing the table in a plane parallel to the table, and the table can be moved in a direction orthogonal to the moving direction of the print head. A sub-scanning drive mechanism that supports the table, a table elevating drive mechanism that drives the table in the elevating direction, and a removable cylindrical printing jig are provided, and the table is moved in one direction under the control of a controller to perform the printing. A table-moving printing device that moves the head in a direction across the table to print on a printing medium on the table, and the cylindrical printing jig is detachably fixed to the machine of the table-moving printing device. A possible holder, a base that is connected to the holder so as to be movable in parallel in the vertical direction, and a pair of cylindrical support rollers provided on the bases that face each other at a predetermined interval for supporting the cylinder. It is provided with a power conversion mechanism that converts the movement of the table of the printing device into rotary motion, and is configured to rotate one of the pair of cylindrical support rollers by using the power of the power conversion mechanism, and is endless to the substrate. The shaped timing belts are rotatably arranged, and the timing pulleys provided on the shafts of the pair of support rollers are meshed with the timing belts to rotate one of the pair of cylindrical support rollers. A printing apparatus characterized in that the other cylindrical support roller in the pair of cylindrical support rollers is rotated in synchronization with the above.

Images