JPH05493U - Paper press mechanism of paper moving probing plotter - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] Prevents the paper-pulling pressure between the drive roller and pressure roller from being transmitted to the Y rail and platen box via the arm that supports them, and also for various paper sizes. Be prepared to respond. A pair of support arms 52 for supporting the drive roller 40 and the pressure roller 56 and the pressure arm 60 are sandwiched, and a spring 72 for urging both arms sandwiches the drive roller and the pressure roller from each other. The pressure is applied so that the reaction force of the pressing force of the drive roller and the pressure roller does not act on the Y rail 44 or the platen box 30 that supports at least one of the two arms. Further, by moving the pressure roller and selecting the drive roller, various paper sizes can be accommodated.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention is a paper moving plotter, that is, a paper pressure machine for a paper driven automatic drafting machine. About the structure.

[0002]

[Prior art]

  Use different sizes of paper in this type of paper moving plotter For this reason, it is possible to use a long drive roller that covers the entire maximum paper size. Conventionally known.

[0003]   Further, as shown in FIG. 5, a plurality of short drive rollers 2 corresponding to the paper size are installed. A bearing 4 is provided between the rollers 2 to prevent the drive shaft 8 linked to the motor 6 from bending. Configurations have been developed.

[0004]

[Problems to be solved by the device]

  However, in the above configuration, the pressure from the pressure roller 10 that is pressed against the drive roller 2 is applied. The force acts on the platen box 12.

[0005]   That is, originally, the platen box 12 is for supporting the platen. However, the paper pressure (3 kg or more) is transmitted to this. Also, The reaction force of the pressure of the pressure roller 10 is also transmitted to the Y rail side that supports the pressure arm. So Therefore, it was necessary to strengthen both the platen box and the Y rail.   The present invention aims to solve these problems.

[0006]

[Means for solving problems]

  In order to achieve the above object, the present invention provides a platen box that supports a platen. A long roller or at least three short drives on a rotatably supported drive shaft The drive roller on one end side of the drive shaft and the drive roller on the other side supporting the roller are selected. Pressure roller to each roller, and the drive roller is rotated forward and reverse to drive the drive roller. While feeding the paper between the moving roller and the pressure roller in the front-back direction on the platen, The pen is moved along the Y rail arranged on the platen to draw a predetermined pattern on the paper. In the paper pressure mechanism of the paper moving plotter configured to perform A guide shaft is arranged parallel to the drive shaft, and the rear part is connected to the guide shaft through a connecting part. The pair of support arms is rotatably supported at a substantially midpoint between the pair of support arms to be connected. Rotatably connects the leading end of the paper to the drive shaft and connects the pair of support arms to the paper Face each other with a space corresponding to the width, and support one of the pair of support arms. A first pressure arm having a pressure roller rotatably attached to the tip thereof adjacent to the holding arm. The pressure arm and the corresponding one of the support arms are sandwiched at a substantially midpoint of Rotatably supported on the guide shaft so that A substantially middle point of the second pressure arm adjacent to the other support arm is defined as the pressure arm and this. The other supporting arm corresponding to the above is rotated around the guide shaft so as to form a scissor structure. Rotatably supported so that the second pressure arm can move along the guide shaft, The rear part of the pair of support arms and the rear part of the first and second pressure arms are provided in the pair. In the direction in which the tip of the support arm of the above and the tips of the first and second pressing arms approach each other. And urges the back of the pair of support arms and the first and second pressure arms. Rotate the pressure shaft to expand the facing distance of the tips of these arms between the rear and The support arm to the Y rail or the support The arm is attached to the platen box.

[0007]

[Action]

  The spring force that urges each rear part of the support arm and the pressure arm in the direction toward each other is The Y-rail or platen that supports the support arm by the scissors structure of both arms Does not work on the box.

[0008]

【Example】

  Hereinafter, the configuration of the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings.   In FIG. 1, reference numeral 30 is a platen box supported by a machine body (not shown). A sheet placing plate, that is, a platen 32 is fixed to this. Driving shafts 34 parallel to each other are provided between both side walls 30a and 30b of the platen box 30. , 36 are rotatably supported.

[0009] A drawing roller 38 is fixed to the drive shaft 34, and both ends of the drive shaft 36 and In the intermediate portion, various short drive rollers 40 having the same diameter as the drawing roller 38 are variously formed. It is fitted and fixed according to the width of the sheet.

[0010] The drive shafts 34 and 36 are connected to the output shaft of the X motor 42 through a power transmission mechanism. , Are configured to rotate in the same direction at the same number of rotations. A Y rail 44 is installed above the platen 32 on the machine body, The drawing head 48 holding the pen 46 on the Y rail 44 moves the Y cursor (not shown). It is mounted so that it can be moved through. The drawing roller 38 and each driving roller 4 A part of the peripheral surface of 0 is parallel to the platen 32 in the longitudinal direction of the Y rail 44. It is loosely fitted in the slit formed in the direction.

[0011] Reference numerals 50 and 52 denote a pair of drive roller support arms, each tip of which is provided on the drive shaft 36. Fitted in rotation near the edge. The rear ends of the support arms 50 and 52 are slidable in the Y-axis direction. The cover 55 is integrally connected by the connecting plate 53 that is transparently provided. 64 is the aircraft It is a supported guide shaft to which approximately the middle of each of the support arms 50, 52. And pressure arms 58 and 60 that rotatably support pressure rollers 54 and 56 at their ends. A substantially midpoint of is rotatably supported.

[0012] The support arms 50 and 52 and the pressure arms 58 and 60 form a scissor structure. It In the vicinity of the rear ends of the pressure arms 58 and 60, the slit 55 of the connecting plate 53 is formed. The lower ends of shafts 66 and 68 that are slidably fitted to are fixedly attached. The shaft 6 The shaft body is located between the upper end enlarged diameter portion of 6, 68 and the washer 71 on the connecting plate 53. Coil springs 70 and 72 are compressed and fitted and arranged in 66 and 68.

[0013] The rear ends of the support arms 50 and 52 of the coil springs 70 and 72 and the pressure arm 5 The spring force that urges the rear ends of 8, and 60 closer to each other, that is, the scissors are closed. Therefore, the pressure rollers 54 and 56 are in elastic contact with the drive roller 40 below. .

[0014] The guide shaft 64 is rotatable with respect to the machine body. As shown in FIG. 3, the frame 60 can be slidable in the axial direction via a bush 64. Fitted in a fixed state. As shown in FIG. 3B, the holes of the pressure arm 60 are The pipe body 65 fixed to the guide shaft 64 is rotatably and slidably fitted to the guide shaft 64. The pressure arm 60 is guided by the fixing screw 67 screwed into the screw hole of the tubular body 65 of It may be detachably fixed to the shaft 64.

[0015] One of the pressure arms 58 needs to be moved and adjusted with respect to the drive shaft 36 as a base point side. Therefore, it may be fixed to the guide shaft 64, or the pressure arm 60 on the other side may be fixed. As described above, the guide shaft 64 may be slidable.

[0016] The mounting portion 74 at the rear of each of the support arms 50 and 52 is slidable on the Y rail 44. It is installed idly. 76 has the freedom to move up and down in the airframe It is a pressure shaft supported movably and substantially parallel to the Y rail 44. It has a large portion a and a narrow eccentric portion b. The pressure shaft 76 includes support arms 50, 5 2 and the rear of the pressure arms 58 and 60 facing each other, and the pressure shaft 76 is rotatable. It is an effective structure.

[0017]   In the above structure, the pressure shaft 76 is driven manually or by driving a rotary solenoid or the like. By the device, the eccentric enlarged portion a of the pressing shaft 76 is rotated by a predetermined angle, and the supporting arms 50, 5 2 and the pressure arms 58 and 60 are opposed to each other, the supporting arm is supported by the eccentric enlarged portion a. The rear portions of the arms 50 and 52 and the pressure arms 58 and 60 are pushed against the elasticity of the springs 70 and 72. Then, the pressure rollers 54 and 56 are separated from the opposing drive roller 40 by a predetermined distance. Against. In this state, the paper 78 is placed on the drive roller 40 on one end side of the drive shaft 36. As a standard, one side of the drive roller 40 and the pressurizing roller 40 are aligned with the reference drive roller 40. The sheet 78 is placed on the platen 32 by inserting it between the rollers 54 and 56.

[0018] One pressure arm 5 corresponding to the size of the paper 78 set on the platen 32. The other pressure arm 60 for 8 is manually slid along the guide shaft 64. And the pressure arm 56 is placed directly above the desired drive roller 40. Pressure arm When 60 is slid along the guide shaft 64, the shaft body 68 moves along the slit 55. Move.

[0019] Next, the pressure shaft 76 is rotated by a predetermined angle manually or by a driving device, and the pressure shaft 76 is biased. The constriction b is made to face the support arms 50 and 52 and the pressure arms 58 and 60, and The pressure of the pressurizing shaft 76 against the frames 50, 52, 58 and 60 is released. This allows The pressure rollers 54 and 56 are driven rollers from above the paper 78 by springs 70 and 72. 40 and pressure rollers 54 and 56 and drive roller 40 on both sides of paper 78. It is completely held.

[0020] The X motor 42 is driven by the command from the controller to drive the drive shafts 34 and 36 forward and backward. The paper 78 is fed in the X direction (left and right direction in FIG. 1) on the platen 32 by controlling the rotation in the direction. Meanwhile, the Y motor is driven to move the drawing head 48 along the Y rail 44 to the paper 78. The sheet 7 on the drawing roller 38 by a pen 46. Perform prescribed drawing on 8.

[0021]   In the above-mentioned structure, the pressure rollers 54 and 56 and the drive rollers by the springs 70 and 72 are used. The holding force of the paper between the rollers 40 is between the support arms 50 and 52 and the pressure arms 58 and 60. Due to the scissors structure, the Y rail 44 that supports the mounting portion 74 of the support arms 50 and 52 Does not work.

[0022]   FIG. 4 shows a recess provided on the lower side of the tip of the drive roller support arm 80 on the other side, The convex portion 84 provided along the Y-axis on the bottom of the platen box 30 fitted to this Therefore, the support arm 80 can be slid on the platen box 30 along the Y axis. A supported embodiment is disclosed.   In the figure, 64 is a guide shaft, 32 is a platen, 44 is a Y rail, and 48 is a drawing head. , 40 is a driving roller, 38 is a drawing roller, 56 is a pressure roller, and 98 is a pressure roller. Reference numeral 76 denotes a pressure shaft, which is supported by the body with a degree of freedom in the left-right direction in the drawing. .

[0023] 68 is fixed to the pressure arm 98 and is slidably inserted into the hole of the support arm 80. And a spring 72 for pressing the pressing arm 98 and the supporting arm 80 in the closing direction. , 46 are pens. The platen 32 is provided with the pressing arm along the Y-axis direction. A slit 99 is formed to allow the movement of the frame 98. The other structure is the first Same as the embodiment.

[0024]   In the above-described structure, the support arm 80 and the pressure arm 98 are elastically driven by the spring. The rear part is biased in the direction in which it is compressed, that is, in the direction in which the scissors close, and this biasing force Then, the pressure roller 56 is pressed against the drive roller 40. This crimped state is the pressure shaft 76. Extending the rear part of the support arm 80 and the pressure arm 98 by the eccentric enlarged part of Then, the pressure roller 56 is separated from the drive roller 40 for a predetermined time.   In each of the above embodiments, the short type driving roller was used, but one long type driving roller was used. You may use a roller.

[0025]

【effect】

  The present invention is a pair of support arms for supporting the driving roller and the pressure roller as described above. And the pressure arm have a scissor structure, and a spring that biases both arms causes the drive roller to Since the pressure roller and the pressure roller are pressed against each other, at least one of both arms Of the drive roller and pressure roller on the Y rail or platen box that supports the arm of It is possible to prevent the reaction force of the applied pressure from acting. Also, move the pressure roller Can be used for various paper sizes by selecting the drive roller. There is the effect of.

[Brief description of drawings]

FIG. 1 is a side view.

FIG. 2 is an external view.

FIG. 3 is an explanatory side view.

FIG. 4 is a side view showing another embodiment.

FIG. 5 is a side view of the prior art.

[Explanation of symbols]

2 drive roller 4 bearings 6 motors 8 drive shafts 10 Pressure roller 12 Platen Box 30 platen box 32 Platen 34 Drive shaft 36 drive shaft 38 Drawing roller 39 Drive roller 40 drive roller 41 drive roller 43 Drive roller 42 X motor 44 Y rail 46 pen 48 stroke head 50 support arm 52 Support arm 54 pressure roller 56 pressure roller 58 Pressure arm 60 pressure arm 66 shaft 68 Shaft 70 coil spring 72 coil spring 74 Mounting part 76 Pressure shaft 78 sheets 80 Support arm 98 Pressure arm

Claims (4)

[Scope of utility model registration request] 1. A drive roller supported by a drive shaft rotatably supported by a platen box supporting a platen, and a pressure roller is pressure-bonded to the drive roller at one end of the drive shaft and the drive roller at the other side, respectively. The paper between the drive roller and the pressure roller is fed in the front-rear direction on the platen by the forward and reverse rotations of the drive roller, and the pen is moved along the Y rail arranged on the platen to move the paper. In a paper pressure mechanism of a paper moving plotter configured to perform predetermined drawing, a pair of support arms having guide shafts arranged parallel to the drive shaft and having rear portions connected to the guide shafts through connecting portions. Is rotatably supported, the tip ends of the pair of support arms are rotatably connected to the drive shaft, and the pair of support arms have an interval corresponding to the maximum width of the sheet. Of the pair of support arms, a substantially intermediate point of the first pressure arm having a pressure roller rotatably attached to the tip thereof adjacent to one of the support arms corresponds to the pressure arm. The one support arm is rotatably supported by the guide shaft so as to form a scissor structure, and a substantially middle point of the second pressure arm adjacent to the other support arm of the pair of support arms is defined by The pressure arm and the other corresponding support arm corresponding thereto are rotatably supported by the guide shaft so as to form a scissor structure, and the second pressure arm is movable along the guide shaft.
The rear portions of the pair of support arms and the rear portions of the first and second pressing arms are connected to the tip ends of the pair of support arms and the first
And a tip of the second pressure arm are urged by a spring in a direction of approaching each other, and between the rear portions of the pair of support arms and the rear portions of the first and second pressure arms, these arms are provided. A paper pressing mechanism for a paper moving plotter, wherein a pressing shaft for expanding the facing interval of the tips is rotatably arranged, and the supporting arm is attached to the Y rail. 2. A paper pressure mechanism for a paper moving plotter according to claim 1, wherein said drive rollers are at least three short drive rollers. 3. A drive roller supported by a drive shaft rotatably supported by a platen box supporting a platen, and pressure rollers are crimped to the drive roller on one end side and the drive roller on the other side of the drive shaft, respectively. Then, the paper between the drive roller and the pressure roller is fed in the front-rear direction on the platen by the forward and reverse rotations of the drive roller, while the pen is moved along the Y rail arranged on the platen. In a paper pressure mechanism of a paper moving plotter configured to perform a predetermined drawing on the paper, a pair of guide shafts are arranged in parallel to the drive shaft, and the rear portions of the guide shafts are connected to each other through connecting portions. The support arms are rotatably supported at a substantially intermediate point, the tip ends of the pair of support arms are rotatably connected to the drive shaft, and the pair of support arms are spaced at an interval corresponding to the maximum width of the sheet. Of the pair of support arms, a substantially intermediate point of the first pressure arm having a pressure roller rotatably attached to the tip thereof adjacent to one of the pair of support arms is defined as the pressure arm. Is rotatably supported by the guide shaft so as to form a scissor structure with the one support arm corresponding to the second support arm adjacent to the other support arm of the pair of support arms. Is rotatably supported by the guide shaft so that the pressure arm and the corresponding other support arm have a scissor structure, and the second pressure arm is movable along the guide shaft. A spring for connecting the rear portions of the pair of support arms and the rear portions of the first and second pressure arms in a direction in which the tips of the pair of support arms and the tips of the first and second pressure arms approach each other. Urged by the pair of support arms Wherein the first rear
And a rear portion of the second pressure arm, a pressure shaft for rotatably extending the facing distance between the tips of these arms is rotatably arranged, and the support arm is attached to the platen box. Paper pressure mechanism for paper moving plotter. 4. The paper pressing mechanism for a paper moving plotter according to claim 3, wherein the drive rollers are at least three short drive rollers.