JP3666924B2 - Printing device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a printing apparatus such as a printer or a plotter, and more particularly to a printing apparatus related to a guide member of a carriage on which a printing member such as an inkjet is mounted.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a printing apparatus uses two round bars as a guide member for guiding a carriage, and adjusts the distance or positional accuracy between an ink head mounted on the carriage and a printing medium, respectively. When the guide member (guide rail) is assembled in the apparatus main body, readjustment has been performed. In addition, when detecting the position of the carriage using a linear scale for controlling the position of the carriage, the linear scale is arranged at a position where it can be easily touched from the outside without particular care. .
[0003]
[Problems to be solved by the invention]
However, the distance between the ink head and the printing medium requires high-precision dimensions in terms of image quality, and the guide rails are inevitably longer in a large plate size apparatus such as A0, A1, etc., and the deflection is large. In order to obtain the required accuracy, adjustments are made externally and readjustment is performed when the guide rail is assembled into the printing apparatus main body, which requires a lot of work for adjustment.
[0004]
In addition, when the linear scale is a thin plate made of stainless steel, it may cause injury by touching the linear sensor during work, or in the case of an MR element linear sensor, the magnetic pole may be disturbed by the contact of the magnet or magnet driver, resulting in malfunction. There was a risk of problems such as the function being stopped.
[0005]
The purpose of the present invention is to easily and easily adjust the printer when it is incorporated into the printer body in order to improve the above-mentioned problems, and it is possible to prevent the occurrence of troubles such as injuries, malfunctions and stoppages due to the linear scale. An object of the present invention is to provide a printing apparatus with improved functions.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a printing apparatus according to the present invention includes a carriage that is mounted with a printing member that ejects ink and travels in a predetermined traveling direction, a main that extends in the traveling direction and guides the carriage in the traveling direction. In a printing apparatus provided with a guide rail,
(1) The main guide rail is adjusted from the side by screws so as to be adjustable and detachable at a plurality of locations apart from each other in the longitudinal direction of the main guide rail at predetermined intervals along the longitudinal direction. And a holding member made of sheet metal in which a bent portion is formed above the main guide rail,
(2) A linear scale for detecting the position of the carriage housed inside the bent portion is provided.
[0007]
In order to achieve the above object, another printing apparatus of the present invention includes a carriage mounted with a printing member for ejecting ink and traveling in a predetermined traveling direction, and holding the carriage and guiding it in the traveling direction. In a printing apparatus comprising a main guide rail extending in the traveling direction,
(3) A sheet metal holding member for holding the carriage and fixing the main guide rail from the side at a plurality of positions spaced apart by a predetermined distance along the longitudinal direction of the main guide rail;
(4) A linear scale for detecting the position of the carriage is provided inside a bent portion formed on the upper portion of the holding member.
[0008]
[Action]
By adopting the printing apparatus of the present invention, before assembling the guide rail into the printing apparatus, the guide rail is attached to the holding member, the straightness of the guide rail is adjusted, and the dimensions of the guide rail are guaranteed. Adjustment during assembly into the main body is simple and easy, and it is possible to prevent the occurrence of troubles such as injuries, malfunctions, and function stoppage due to the linear scale, and the function is improved.
[0009]
【Example】
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0010]
FIG. 1 is a schematic vertical sectional view of an embodiment of the present invention, and FIG. 2 is a perspective view of the vicinity of a carriage holding portion, which is a main part of FIG. In FIG. 1 and FIG. 2, the paper feed roller 11 of the printing apparatus 1 is a roller that has a blasting process on the outer peripheral surface and has a strong grip on the sheet material P. The sheet material P is conveyed onto the platen 2 by a paper feed roller 12 whose outer peripheral surface is paired with a paper feed roller 11 and is made of rubber. A suction opening 21 is provided on the contact surface of the platen 2 with the sheet material P, and a plurality of suction fans 3 are disposed on the side facing the opening 21. Thus, the sheet material P is brought into close contact with the platen 2.
[0011]
In this embodiment of the carriage holding portion 5, the sheet material P is guided by a guide member (main guide rail) 51 made of a round bar and a part of a holding member (rail stay) 52 that holds the main guide rail 51. The carriage 4 travels in a direction orthogonal to the traveling direction. Ink is ejected from the head portion 411 of the ink cartridge 41 held on the carriage 4 to print on the sheet material P.
[0012]
C-shaped bearings 421 provided at two locations in the longitudinal direction of the carriage main body 42 are bonded to the engagement portion of the carriage 4 with the main guide rail 51. In the present embodiment, a guide surface 521 formed in a flat plate shape is provided on the upper portion of the rail stay 52 as another guide member. A rotating member (bearing) 43 fixed to a shaft 422 inserted in the carriage main body 42 is brought into contact with the guide surface 521.
[0013]
On the opposite side across the thickness of the guide surface 521, the swing movable plate 61 is pressed by a compression spring 45 with the shaft 44 held by the carriage body 42 as the swing center. Two shafts 611 are fixed to the swingable movable plate 61 in the longitudinal direction, and rotating members (bearings) 62 are respectively attached to the shafts 611. The bearings 62 thus pressurized together with the bearings 43 are rail stays. 52 is always in contact with and pinched by the guide surface 521.
[0014]
Accordingly, the bearings 43 and 62 facing each other with the guide surface 521 interposed therebetween prevent the rail stay 52 from falling during traveling of the carriage 4 and enables smooth movement. In addition, an end portion of a belt 46 that transmits a drive for moving the carriage 4 is fixed to the carriage body 42.
[0015]
In addition, as shown in FIG. 3, a bent portion 522 in which the upper end portion of the rail stay 52 is bent in a U-shape is provided, and a magnetoresistive effect that causes a change in electric resistance is generated when the bent portion 522 is placed in a magnetic field. A linear scale 53 of an MR element is provided, and a reading sensor 47 fixed to the carriage body 42 is in contact with the linear scale 53.
[0016]
As described above, the carriage holding portion 5 is first assembled in the unit before being assembled into the printing apparatus 1, and the positioning pin 54 is provided at the end portion in the longitudinal direction of the rail stay 52. And is fixed by a screw 55.
[0017]
After the bending of the main guide rail 51 due to gravity and the straightness due to component accuracy are inspected by an assembly jig (not shown), the main guide rail 51 is fixed to the rail stay 52 by adjusting with screws 56 and nuts 56a.
[0018]
Two side plates 7 are provided opposite to each other of the rail stay 52, and the side plate 7 has a hole 81 that engages with the bearing portion of the paper feed roller 11 and a hole 82 that engages with the main guide rail 51. The hole position is provided accurately. As a unit of the carriage holding unit 5 adjusted, the hole 81 of the sheet feeding roller 11 and the inclination of the carriage 4 are adjusted by an adjustment jig (not shown) in accordance with the holes 82 of the side plates 7 on both ends of the main guide rail 51. In order to decide, the position of the guide surface 21 which is another reference surface of the rail stay 52 is adjusted, and the space between the side plates 7 is fixed by another rail stay (not shown). Further, the platen 2 is adjusted and fixed at a predetermined position.
[0019]
As a result, the distance and position between the print head unit 411 and the sheet material P are accurately determined. In this embodiment, the printing apparatus 1 of the plotter 1 for the sheet material P having a large width such as the A0 sheet or the A1 sheet will be described, but the sheet width is narrow, that is, short for the A3 sheet and the A4 sheet. When using parts, it goes without saying that there is no need for adjustment when the parts are assembled with the manufacturing accuracy of the respective parts and the precision required at the time of completion can be satisfied.
[0020]
As described above, according to the present invention, the rail portion for guiding the carriage 4 can be easily assembled as a unit outside, and not only can the assembly with the carriage body 42 be facilitated, but also the main part of the round bar as in the prior art. There is no need to use a plurality of guide rails 51, and the manufacture thereof becomes easy. Furthermore, by arranging the linear scale of the MR element in the sheet metal bent portion 522 provided in the rail stay 52, it is not necessary to separately provide a cover for the linear scale, and adverse effects of the magnet and the magnetic driver can be prevented.
[0021]
The linear scale is not limited to the MR element, and may be a linear scale 59 in which a slit 58 is formed in a stainless steel thin plate 57 provided in a bent portion 522 of the rail stay 52 as shown in FIG. Injuries caused by touching fingers and hands can be prevented.
[0022]
Further, as shown in FIG. 5, the arrangement of the magnetized portion 531 of the linear scale 53 of the MR element is arranged on the opposite side of the opening, thereby further improving the safety.
[0023]
In addition, this invention is not limited to the said Example, It is possible to implement in another aspect by making an appropriate design change.
[0024]
【The invention's effect】
As is apparent from the above description, the printing apparatus of the present invention is provided with a main guide rail for guiding the carriage travel, a rail stay for holding the main guide rail at one end, and a main stay at the other end of the rail stay. By providing a guide surface that guides the carriage travel together with the guide rail, and providing a bent portion in a part of the rail stay, and arranging a linear scale inside the bent portion, there is a problem with the prior art. It can be easily solved, and the adjustment at the time of assembling into the printer main body becomes simple and easy, and the occurrence of troubles such as injury, malfunction and stoppage due to the linear scale is prevented, and the function is improved.
[Brief description of the drawings]
FIG. 1 is a schematic vertical sectional view of an embodiment of the present invention.
FIG. 2 is a perspective view of the vicinity of a carriage holding portion, which is a main part of FIG.
FIG. 3 is a schematic view of attachment of a linear scale of an MR element.
FIG. 4 is a schematic view of attachment of a linear scale made of a stainless steel thin plate.
FIG. 5 is a better layout of the linear scale of the MR element.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Printing apparatus 2 Platen 4 Carriage 41 Ink cartridge 42 Carriage main body 5 Carriage holding part 51 Main guide rail 52 Rail stay 522 Bending part 53 Linear scale 531 Magnetizing part

Claims (2)

A printing apparatus comprising: a carriage that mounts a printing member that ejects ink and travels in a predetermined traveling direction; and a main guide rail that extends in the traveling direction and guides the carriage in the traveling direction.
With both longitudinal ends the main guide rail at a plurality of locations spaced a predetermined distance along the longitudinal direction of the part excluding the is fixed by adjustable and removably laterally by screws of the main guide rail, the A holding member made of sheet metal in which a bent portion is formed above the main guide rail;
A printing apparatus comprising: a linear scale housed inside the bent portion for detecting the position of the carriage. In a printing apparatus comprising a carriage mounted with a printing member for discharging ink and traveling in a predetermined traveling direction, and a main guide rail extending in the traveling direction for holding the carriage and guiding the traveling direction,
Is fixed from the side of the main guide rail at a plurality of locations spaced a predetermined distance along the longitudinal direction of the main guide rail, a sheet metal holding member for holding the carriage,
A printing apparatus, comprising: a linear scale for detecting the position of the carriage, which is installed inside a bent portion formed on an upper portion of the holding member.

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