JP3953556B2 - Printer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a slip printer that performs single sheet printing of cut sheets, slips, and the like, and more particularly to a printer having a paper guide structure that accurately positions side edges of slip sheets.
[0002]
[Prior art]
Conventionally, in this type of technology, as shown in the representative example of the schematic explanatory diagram of FIG. 7, the slip paper 500 is transported from the front side to the back side of the paper so as to be orthogonal to the carriage 111 mounted with the print head and moving left and right. Many of the types that are made are offered.
[0003]
Since these printers have a structure in which one side is opened as shown in FIG. 7 so that even a wide slip paper 500 can be printed, the frames 31 and 32 of the printer main body are made of metal to ensure strength. Made from board.
[0004]
On the other hand, the case of the device on which the printer is mounted is made of resin, and the printer main body is fixed to the resin lower case 100 by screws 113 and then casing by the resin upper case 200.
[0005]
Furthermore, the printer is provided with a document table 300 that is made of resin and guides the slip paper 500 so as to be continuous with the paper guide of the printer main body in the vicinity of the joint portion between the lower case 100 and the upper case 200.
[0006]
The document table 300 is fixed to the lower case 100 with screws 115, and the upper case 200 forms a hook portion at one end with respect to the lower case 100 and the other end is fixed with screws 114.
[0007]
The document table 300 can be easily changed in specification by changing to a type having a different size or shape in accordance with a change in paper size or usage.
[0008]
The positional relationship between the document table 300 and the paper guide of the printer main body will be further described with reference to FIG.
[0009]
An end wall 301 protruding upward for guiding the end of the slip paper 500 disposed at the right end of the document table 300, and a paper guide end wall having the same function as the end wall 301 of the document table 300 provided in the printer main body. 401 is attached in a straight line with respect to the conveyance direction of the slip paper 500 as shown in FIG.
[0010]
When slip paper is set, the slip paper 500 is set in contact with the end wall 301 of the document table 300 (solid line position) and then inserted in the direction of the arrow D, and is nipped by a paper feed roller (not shown). , Printed and conveyed.
[0011]
The slip paper 500 conveyed to the desired position shown by the two-dot chain line was then further conveyed in the direction of arrow D and discharged to the opposite side of the printer or discharged in the direction of arrow E.
[0012]
[Problems to be solved by the invention]
However, in the above-described structure, it is required to accurately match the positions of the end wall 301 of the document table and the end wall 401 of the paper guide.
[0013]
For example, as shown in FIG. 8B, the end wall 301 of the document table 300 is assembled to the left side of the drawing by a distance ΔH with respect to the paper guide end wall 401 (reference position) of the printer body. In this case, the slip paper 500 moves along the end wall 301, but as the contact length with the end wall decreases, the end of the slip paper 500 contacts the paper guide end wall 401 (reference position) of the printer main body. Rotate to touch. For this reason, there is a problem in that the print quality is deteriorated because the line spacing of the prints is different. Further, when the slip paper 500 conveyed to the position illustrated by the two-dot chain line is discharged to the insertion side in the direction of arrow E, the paper is caught at the corner 302 of the document table, and a paper jam (paper jam) occurs. There was a problem that the paper cannot be fed normally.
[0014]
Further, as shown in FIG. 8C, the end wall 301 of the document table 300 is distanced to the right of the drawing with respect to the paper guiding end wall 401 (reference position) of the printer main body, contrary to FIG. 8B. When the paper is assembled by being shifted outward by ΔH, the slip paper 500 is locked at the corner 402 of the paper guide in the middle of paper feeding at the time of insertion, so that the normal paper feeding such as poor insertion property or being conveyed at an inclination. It has a problem that cannot be done.
[0015]
In addition, when a change occurs in the environmental temperature where the printer is placed, the paper guide of the printer body is attached to a metal or metal frame, so that the reference position (end wall 401 position) does not change substantially. Since the document table itself is made of plastic and is attached to the plastic case 100, the document table shrinks with respect to the position of the screw 115, and the end wall 301 of the document table is displaced inward by a distance ΔH on the left side of the figure. The problem similar to 8 (b) occurs.
[0016]
Similarly, at a high temperature, the plastic material expands, and the end wall 302 of the document table is shifted outward by a distance ΔH, causing the same problem as in FIG. 8C.
[0017]
Further, this type of slip has a recording portion printed with magnetic ink in the area 501 of FIG. 8A, and the printer side reads the recording portion to authenticate the slip or check. and a MICR (M agnetic I nk C haracter R eader) 600. In this case, if the position of the end wall 301 of the document table is shifted, this character cannot be read correctly.
[0018]
An object of the present invention is to provide a printer that solves the above-described problems, improves printing quality, has no paper jam (paper jam), and further improves the insertion of recording paper.
[0019]
Another object of the present invention is to provide a print having no detection malfunction in a printer having a detector for detecting recording paper.
[0020]
[Means for Solving the Problems]
In order to solve the above-described problem, the printer of the present invention is a printer that transports one side edge of the slip paper while abutting the one side edge of the slip paper. A guide member provided with a guide wall and mounted on the printer frame; a second guide wall with which a side edge of the slip paper abuts; a document table that forms a conveyance path for the slip paper together with the guide member; When attached to the printer frame, the document table is biased toward the first guide wall so that the second guide wall is disposed on an extension line on the upstream side or the downstream side of the first guide wall. And a biasing member .
[0021]
According to the above configuration, since the guide member and the document table are both mounted on the guide wall side frame without gaps, the amount of deviation between the guide walls is very small, there is no paper jam, and the recording paper is inserted. Can be improved. Even if the environmental temperature changes, the length of the printer frame and each guide wall side is short, so the difference in relative position due to temperature change is extremely small, so there is no deterioration in function due to temperature characteristics, The improvement and the improvement of the paper feed quality are achieved.
[0022]
The document table is attached to the printer frame by moving toward the first guide wall along a part of the printer frame, and the document table or the printer frame has a moving direction of the document table. The biasing member is provided on the other side, and the biasing member biases the tilting surface in a direction perpendicular to the moving direction of the document table. .
[0023]
According to the above configuration, since the urging member is urged in a direction different from the moving direction of the document table, it is possible to simply move the document table. The margin for designing such as expanding the range is expanded. Furthermore, the document table can be easily assembled without being fixed with screws or the like, and the operability is further improved.
[0025]
Note that it is preferable that the urging member is provided on the printer frame side, because there is less deformation due to handling and less failure than that provided on the document table on the side to be removed .
[0026]
Furthermore, the biasing member is a coil spring member suspended from the document table and the frame.
[0027]
Since the coil spring is very easy to manage the spring force, it is easy to adjust the contact force for operability and prevention of the document table from falling off.
[0028]
Furthermore, the document table is formed of a plastic resin.
[0029]
According to the said structure, since it is a resin with a large linear expansion coefficient by the structure of this application, since the above-mentioned quality and effect do not fall, it can process by the shaping | molding excellent in mass-productivity.
[0030]
DETAILED DESCRIPTION OF THE INVENTION
A preferred embodiment of the present invention will be described with reference to the drawings.
[0031]
FIG. 1 is a diagram showing the overall appearance of the printer according to the present invention. The document table 1 is mounted in the gap between the upper and lower plastic cases 100 and 200, and a part 210 of the upper case 200 can be opened and closed. Replace it.
[0032]
FIG. 2 is a schematic side view showing the relationship between the printing mechanism and the document table 1. The slip paper 500 is inserted in the direction of the arrow and sent to the printing unit while being in contact with the end wall 12 of the document table 1. When the paper detector 150 detects the leading edge of the slip paper 500, it sends a signal to a control unit (not shown), and the control unit drives a motor as a power source to rotate the paper feed roller 132.
[0033]
The paper feed roller 132 cooperates with the press roller 131 to pass the slip paper 500 between the print head 110 and the platen 140.
[0034]
The slip paper 500 is printed by the print head 110 and moved in the insertion direction of the arrow after printing. For printing, the print head 110 performs desired printing while reciprocating in the direction perpendicular to the paper surface via the ink ribbon 120. When the desired printing is completed, the paper feed roller reverses and the slip paper 500 is returned to the insertion slot.
[0035]
When the slip paper 500 reads characters written with magnetic ink on the back side of the print surface and performs printing after confirming the authentication, the slip paper 500 is moved between the print head 110 and the platen 140 by the paper feed roller 132 as in the case of printing. A character written on the slip paper 500 with magnetic ink is read by the MICR detector 600 that passes between them, and authentication is confirmed. If there is no problem as a result of the authentication check, printing starts.
[0036]
In the present embodiment, the slip paper 500 is returned to the insertion port by the reverse rotation of the paper feed roller 132 before printing is started, and the above-described printing is performed after the slip paper 500 is moved again in the insertion direction.
[0037]
In order to shorten the printing time, the MICR detector 600 reads the magnetic ink on the slip paper 500 and confirms the authentication, and then performs desired printing by the print head while feeding back to the front side of the printer (right side of the drawing). It doesn't matter.
[0038]
Further, the printer of this embodiment has a paper feed roller 133 arranged at the rear stage. When the slip paper 500 is discharged to the rear side of the printer or when printing is performed up to the vicinity of the rear end of the slip paper 500, the paper A feed roller 133 is used. More specifically, the paper feed roller 133 is always in the position of the solid line. When the slip paper 500 is fed by the paper feed roller 132 for a predetermined number of steps at which the leading edge of the slip paper 500 reaches the paper feed roller 133, the paper feed roller 133 The roller 133 moves in the direction of the arrow a at the broken line position and feeds the slip paper 500 while being pressed.
[0039]
3 and 4 show an example of a document table used in the present invention. FIG. 3 shows a top surface on which slip paper or the like is mounted, and FIG. 4 shows a bottom surface side.
[0040]
The document table 1 is substantially U-shaped, and an end wall 12 for guiding a side edge of slip paper is formed on a front edge portion 11 on the upper surface. When the document table 1 is attached to the printer body of the printer, the gap portion 13 is used for positioning the print head 110 from above and the platen 140 and paper feed roller 132 from below as described in FIG. is there.
[0041]
On the other hand, on the bottom surface of the document table 1, two columnar projections 14a and 14b for pressing the document table 1 toward the printer main body frame side in cooperation with a spring member attached to the printer main body, which will be described in detail later, are provided. Is provided. Furthermore, a hook portion 15 for preventing the document table 1 from floating upward is provided. The gap portion 13a is a window in which a detector 150 for detecting slip paper provided on the printer main body side is inserted, and the gap portion 13b is a window in which the MICR detector 600 is arranged.
[0042]
FIG. 5 is a perspective view from above, and is an explanatory view of attachment in which the engagement relationship between the protrusion 14 of the document table 1 and the spring member 2 is understood.
[0043]
The printer body forms a strong box shape with the left and right metal frames 31, 32 and the front and rear metal frames 33, 34. The paper guide 40, the motor of the drive source, the train wheel parts (not shown), etc. And a part of the frame is fixed to the lower case 100.
[0044]
Further, the substantially U-shaped plate-like spring member 2 is attached to the metal frame 33 in a cantilevered state by screws 22 or the like, and further, the metal frame 33 is bent outward and has a tongue 33b. The frame 34 is provided with a tongue 34a.
[0045]
Document Table 1, moving from FIG left to right, so moves along the frame 33 before the sandwich is columnar projections 14b and 14a, moves while being restricted to longitudinal position. Further, when the document table 1 is moved, the end surface of the document table comes into contact with the contact portion 31a of the right frame 31 and the contact portion 33a of the front frame 33, and the movement is stopped.
[0046]
The document table 1 is lifted upward by the front end portion 16 arranged at the front and rear of the right end face penetrating into a part of the frame and on the right side, and further the hook portion 15 on the tongue portions 33b and 34a of the frames 33 and 34. The left side is regulated by engaging with.
[0047]
Next, the function of the plate spring member 2 will be described in detail.
[0048]
When the document table 1 is moved to the right side in FIG. 5 in order to mount the document table 1, the slope portion 14c of the columnar protrusion 14a displaces the top portion 21 in the direction of arrow A against the spring force of the spring member 2, When further moved, the top portion 14d of the columnar protrusion 14a passes over the top portion 2a of the spring member 2, and the spring member moves to the side opposite to the arrow A direction and is positioned as shown in FIG.
[0049]
Since the plate spring member 2 always urges the inclined surface of the columnar protrusion 14a in the direction opposite to the arrow A direction, the document table 1 is always urged in the arrow B direction.
[0050]
In addition, the slope part 14 and the slope part 14e of the columnar protrusion 14a are set with a small force at the time of insertion by setting the angle of the former small and the angle of the latter large, so that a large force is required when coming out. Easy to set but difficult to remove.
[0051]
Further, since the free end 2c of the plate spring member 2 is in contact with the front frame 33, deformation can be prevented, and the free end 2c can be set by being deformed with a small force until it comes into contact with the front frame. The spring force is changed at the time of setting so that a large force is required when the free end 2c comes into contact with the frame 33, so that the operator can easily understand the mechanism.
[0052]
As described above, the document table 1 is regulated in the vertical direction by the front end portion 16 and the tongue portion, and the position of the document table 1 is determined by bringing the end surface of the document table into contact with the frame by the plate spring member 2.
[0053]
The paper guide 40 assembled to the printer main body is attached so that a part 40a thereof contacts the frame 31.
[0054]
Therefore, both the document table 1 and the paper guide 40 are mounted in contact with the frame 31.
[0055]
As a result, the position of the end wall 12 (second guide wall) of the document table 1 and the position of the end wall 41 (first guide wall) of the paper guide 40 are in contact with the end wall of the paper guide and the frame 31. It is determined by the dimensional accuracy of the surface and the dimensional accuracy from the inside of the frame 31 to the contact portion 31a and the contact portion 33a of the front frame 33, but both can be set to around 0.1 mm. It was possible to arrange them almost on a straight line.
[0056]
At this time, since the document table 1 can be maintained in an accurate positional relationship simply by being pressure-inserted without using any screws, the paper can be fed in the state shown in FIG. There is no problem.
[0057]
Even if the material of the document table 1 is metallic or resinous, it is easy to incorporate because no screws are used for fixing, and even in the case of resinous materials such as plastic, the environmental temperature changes significantly. Since the plate spring member 2 always pushes the columnar protrusion 14a in the direction of the arrow B even when the table 1 is extended and contracted, the position of the end wall 12 maintains the initial state regardless of the length of the document table 1. There is no deviation from side to side. As a result, the state as shown in FIGS. 8B and 8C does not occur, so that there is no problem due to the state shown in FIGS. 8B and 8C.
[0058]
In this embodiment, the plate-like spring member is provided on the frame side and the columnar protrusion is formed on the document table side, but each may be formed in reverse to provide the spring member on the document table side.
[0059]
FIG. 6 shows another embodiment of the document table mounting structure of the present invention, and is an example in which a coil-shaped spring member 20 is used as the spring member. After the document table 1 is inserted to the position of the contact portion 33a, the spring member 20 is suspended between the right frame 31 and the small protrusion 10, and the document table 1 is pulled in the direction of arrow C so as to be always in pressure contact with the contact portion 33a. Has been. In this embodiment, the contact force can be easily adjusted by changing the spring force of the spring member 20. The position where the spring member 20 is suspended is not limited to the frame 31 and may be the front frame 33 or the lower case 100.
[0060]
In the above embodiment, the slip paper is inserted from the front of the printer and discharged again from the front. However, the present invention naturally has an effect even if the slip paper is inserted from the front and discharged backward. It does not limit the scope of the claims.
[0061]
【The invention's effect】
As described above, according to the present invention, the printer frame and the first guide wall with which the side edge of the slip paper in the vicinity of the printing area abuts, the guide member mounted on the printer frame, and the side edge of the slip paper are provided. A second guide wall, which forms a slip paper conveyance path together with the guide member, and when the document table is attached to the printer frame, the second guide wall is the first guide wall. And a biasing member that biases the document table toward the first guide wall so as to be arranged on an extension line on the upstream side or the downstream side of the first and second guide walls. It becomes very small, there is no paper jam, and the insertion property of the recording paper can be improved. Even if the environmental temperature changes, the length of the printer frame and each guide wall side is short, so the difference in relative position due to temperature change is extremely small, so there is no deterioration in function due to temperature characteristics, The improvement and the improvement of the paper feed quality are achieved.
[0062]
The document table is attached to the printer frame by moving toward the first guide wall along a part of the printer frame, and the document table or the printer frame has a moving direction of the document table. The biasing member is provided on the other side, and the biasing member biases the inclined surface in a direction orthogonal to the moving direction of the document table. Can be installed with simple operation. Furthermore, the document table can be easily assembled without being fixed with screws or the like, and the operability is further improved.
[0064]
Furthermore, if the biasing member is a coiled spring member suspended between the document table and the frame, the spring force can be managed very easily, so the contact force should be adjusted for operability and to prevent the document table from falling off. Is easy.
[0065]
Furthermore, since the document table is made of plastic resin, it can be processed by molding with excellent mass productivity.
[Brief description of the drawings]
FIG. 1 is an external view of an entire printer equipped with a document table of the present invention.
FIG. 2 is a schematic side view of the printer of the present invention.
FIG. 3 is a top view showing an appearance of a document table applied to the present invention.
FIG. 4 is a bottom view showing the appearance of a document table applied to the present invention.
FIG. 5 is a top perspective view illustrating a structure in which the document table of the present invention is pressed against the metal frame side.
FIG. 6 is a diagram showing another embodiment of the present invention.
FIG. 7 is a view showing a conventional document table fixing structure;
FIG. 8 is a diagram for explaining a paper jam state of slip paper due to a difference in attachment position of a document table.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Document table 2, 20 Spring member 12 End wall 31, 32, 33, 34 of document table Metal frame 40 Paper guide 41 End wall of paper guide

Claims (3)

In a printer that transports one side edge of slip paper with contact restriction,
A first guide wall with which a side edge of the slip paper in the vicinity of a printing area abuts, and a guide member on which the guide wall side is attached to a printer frame;
A document table that includes a second guide wall against which the side edge of the slip paper abuts, and forms a conveyance path for the slip paper together with the guide member;
When the document table is attached to the printer frame, the document table is placed on the printer frame so that the second guide wall is disposed on an extension line on the upstream side or the downstream side of the first guide wall. And a biasing member that regulates the position by being pressed against the printer. 2. The printer according to claim 1, wherein the document table is attached to the printer frame by moving toward the first guide wall along the printer frame.
One of the document table or the printer frame is provided with an inclined surface that is inclined with respect to the moving direction of the document table, and the other is provided with the urging member that is in contact with the inclined surface. Is also urged in a direction orthogonal to the moving direction of the document table. 2. The printer according to claim 1, wherein the biasing member is a coiled spring member suspended from the document table and the frame.

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