JPH05492U - Paper press mechanism of paper moving probing plotter - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] Prevent the paper-clamping pressure between the drive roller and pressure roller from being transmitted to the Y rail and platen box via the arm that supports them. 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, a bearing for the drive shaft is unnecessary, and the bending of the drive shaft is prevented by the supporting force of the roller receiver.

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. The long drive roller has a high precision so that it can be used uniformly over the entire area. It is expensive because it requires a certain degree of pressure, and if pressure is applied to the center of the roller, the roller There was a flaw that caused it to bend. Also, since the weight is large, the inertia increases. , The motor that drives this becomes larger, and the power of the motor driver, power supply, etc. It was necessary to increase the work.

[0003]   In order to solve these problems, as shown in FIG. A short drive roller 2 is provided, a bearing 4 is provided between each roller 2, and is linked to a motor 6. A structure has been developed to prevent the flexure of the drive shaft 8 due to

[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, the platen box 12 is for supporting the platen. Nevertheless, the sheet pressure (3 kg or more) is transmitted to this. In addition, the pressure The reaction force of the pressure of the roller 10 is also transmitted to the Y rail side that supports the pressure arm. for that reason 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. At least a pair of short drive rollers are supported on a drive shaft rotatably supported, Clamp both sides of the paper placed on the platen between the drive roller and the pressure roller, The paper is fed forward and backward on the platen by the forward and reverse rotation of the drive roller. , Move the pen across the paper along the Y rails on the platen For a paper moving plotter that is designed to perform the specified drawing on the above paper. In the paper pressure mechanism, each of a pair of support arms having a roller receiver at the tip is approximately in the middle. Both arms are located at approximately the midpoint of the pressure arm with the pressure roller attached to the tip at the intermediate point. A support arm of the pair of support arms, which is rotatably supported so as to form a scissor structure. The roller receiver of is arranged below the drive roller, and the support arm and the pressure arm are Each rear part of the arm is urged by springs in the direction in which the tips of both arms approach, Rotate a pressure shaft to spread the tips of both arms against the spring force at the rear of the arm. Possibly arranged and the pair of support arms is attached to the Y rail, or The pair of support arms are 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 A plurality of short drive rollers 39, 43 having the same diameter as the drawing roller 38 are provided in the middle portion. , 41, 40 are fitted and fixed corresponding to various paper widths.

[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 the driving roller 39 , 43, 41, and 40 are part of the peripheral surface of the platen 32 and the length of the Y rail 44. It is loosely fitted in a slit formed in a direction parallel to the hand direction.

[0011] Numerals 50 and 52 are a pair of drive roller supporting arms, and a flat roller receiver 5 is provided at the tip. 0a and 52a are formed. The roller receiver 50a of one support arm 50 is One end of the drive shaft 36 is disposed in contact with the lower side of the drive roller 39, and the other support arm is provided. The roller receiver 52a of 52 is located on the lower surface arrangement line of the drive rollers 41, 40, 43. It is movably arranged. U-shaped frame approximately in the middle of each of the support arms 50 and 52 The pressure arm 58, 6 which rotatably supports the pressure roller 54, 56 at the tip is rotatably attached to the portion. An approximately midpoint of 0 is rotatable about axes parallel to the drive shaft 36, and the shafts 62 and 6 are rotatable. Four are 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 rear of the support arms 50 and 52 The lower ends of shafts 66 and 68 that are transparently provided near the ends are fixed. The shafts 66, 6 8 is located between the upper expanded portion of the shaft 8 and the upper surfaces of the support arms 58 and 60. Coil springs 70 and 72 are compressed and fitted and arranged in the coils 6 and 68. The coil The rear ends of the support arms 50, 52 of the springs 70, 72 and the pressure arms 58, 60 By the spring force urging the rear ends and the two towards each other, i.e. closing the scissors, The pressure rollers 54 and 56 are in elastic contact with the drive rollers 39 and 40 below them.

[0013] The mounting portion 74 at the rear of each of the support arms 50 and 52 is attached to the Y rail 44. It is slidably mounted in a groove 45 formed over the entire length in the longitudinal direction. . The support arm 50 on the one base point side may be fixed to the Y rail 44. 76 Is a member supported by the above-mentioned airframe substantially parallel to the Y-rail 44 with a degree of freedom in the vertical direction. The pressure shaft has an eccentric enlarged portion a and an eccentric narrow portion b. The pressure shaft 76 is The support arms 50 and 52 and the pressure arms 58 and 60 are disposed between the facing rear portions, and The pressure shaft 76 has a rotatable structure. The platen 32 has a support arm. A slit 33 is provided so as to allow the movement of 52 along the Y-rail 44. It

[0014]   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. And the pressure rollers 54, 56 are unfolded so that they are opposite drive rollers, for example 39, 43. Isolate for a predetermined period of time. In this state, the paper 78 is set with the drive roller 39 as a reference. , One side of which is aligned with the drive roller 39 and between the drive roller 39 and the pressure roller 54. The sheet 78 is inserted and placed on the platen 32.

[0015] One support arm 5 corresponding to the size of the paper 78 set on the platen 32. The other support arm 52 with respect to 0 is manually slid along the drive shaft 36. Then, the roller receiver 52a of the support arm 52 is moved to the lower side of the desired drive roller, for example, 40. To place.

[0016] 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. 39 and 40, and the pressure roller 54 and 56 and the drive roller 39 on both sides of the paper 78. , 40 and are firmly held.

[0017] 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.

[0018]   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.

[0019]   In FIG. 3, the drive roller support arm 80 on the other side is connected to the Y axis of the platen box 82. Disclosed is an embodiment in which a slit 84 formed in the direction is slidably supported. There is.   In the figure, 80a is a roller receiver, 86 is a platen, 88 is a Y rail, and 90 is a drawing line. Pad, 92 a drive roller, 94 a drawing roller, 96 a pressure roller, and 98 a pressure roller An arm, 100 is a pressure shaft, and 102 is a pressure arm 98. A shaft body slidably inserted into the hole of the pressing arm 104 and a pressing arm 98 and a supporting arm 8 A spring for pressing 0 in the closing direction and a pen 106. 99 is a pressure arm 98 Is a slit formed on the platen to enable the movement of the plate in the Y-axis direction. other The structure of is the same as that of the first embodiment.

[0020]   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 96 is pressed against the drive roller 92. This pressure-bonded state is the pressure shaft 10. The rear part of the support arm 80 and the pressure arm 98 can be expanded by the eccentric bulge of 0. And the pressure roller 96 is separated from the drive roller 92 by a predetermined distance. .

[0021]

【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, bearings for the drive shaft Is unnecessary, and the deflection of the drive shaft is prevented by the support force of the roller receiver. There are effects such as being able to

[Brief description of drawings]

FIG. 1 is a side view.

FIG. 2 is an external view.

FIG. 3 is a side view showing another embodiment.

FIG. 4 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 82 Platen Box 86 Platen 88 Y rail 90 stroke head 92 Drive roller 94 Drawing roller 96 pressure roller 98 Pressure arm 100 pressure shaft 102 shaft 104 spring 106 pen

Claims (4)

[Scope of utility model registration request] 1. A sheet mounted on a platen between a drive roller and a pressure roller, wherein at least a pair of short drive rollers are supported on a drive shaft rotatably supported by a platen box supporting the platen. And feeds the paper in the front-rear direction on the platen by rotating the drive roller in the forward and reverse directions, while moving the pen across the paper along the Y rails arranged on the platen. In a paper pressure mechanism of a paper moving plotter configured to perform a predetermined drawing on the paper, a pressure arm having a pressure roller attached to the tip at substantially the midpoint of each of a pair of support arms having a roller receiver at the tip. Is rotatably supported so that both arms form a scissors structure, and the roller receivers of the support arms of the pair of support arms are arranged below the drive roller. In order to widen the front ends of the both arms against the spring force, the rear parts of the support arm and the pressure arm are biased by springs in the direction in which the front ends of the both arms approach each other. The paper pressing mechanism for a paper moving plotter, wherein the pressing shaft is rotatably arranged and the pair of support arms are attached to the Y rail. 2. The drive shaft supports three or more short drive rollers, and the roller receiver of one of the pair of support arms is located below one end of the drive shaft. And the roller receiver of the other support arm is arranged on the lower surface arrangement line of the drive roller, and the other support arm of the pair of support arms is slidable along the longitudinal direction of the Y rail. The paper pressing mechanism of the paper moving plotter according to claim 1, wherein 3. A sheet mounted on a platen between a drive roller and a pressure roller, wherein at least a pair of short drive rollers are supported on a drive shaft rotatably supported by a platen box supporting the platen. And feeds the paper in the front-rear direction on the platen by rotating the drive roller in the forward and reverse directions, while moving the pen across the paper along the Y rails arranged on the platen. In a paper pressure mechanism of a paper moving plotter configured to perform a predetermined drawing on the paper, a pressure arm having a pressure roller attached to the tip at substantially the midpoint of each of a pair of support arms having a roller receiver at the tip. Is rotatably supported so that both arms form a scissors structure, and the roller receivers of the support arms of the pair of support arms are arranged below the drive roller. In order to widen the front ends of the both arms against the spring force, the rear parts of the support arm and the pressure arm are biased by springs in the direction in which the front ends of the both arms approach each other. The paper pressing mechanism for a paper moving plotter, wherein the pressurizing shaft is rotatably arranged, and the pair of support arms are attached to the platen box. 4. The drive shaft supports three or more short type drive rollers, and a roller receiver of one of the pair of support arms is located below one end of the drive shaft. And the roller receiver of the other support arm is arranged on the lower surface arrangement line of the drive roller, and the other support arm of the pair of support arms is slidable along the longitudinal direction of the Y rail. The paper pressure mechanism of the paper moving plotter according to claim 3, wherein