JP5099760B2 - Registration device for printing press - Google Patents

Description

  The present invention relates to a registration device for a printing press, and in particular, a potentiometer for detecting a rotational phase and a drive motor are integrated, and a zero point adjustment can be performed from the outside by manually rotating a case of the potentiometer. The present invention relates to a registration device for a printing press.

  The plate cylinder itself, around which the plate cylinder is wound, is moved in the top-down direction in preparation for a misregistration at the shaft section of the printing cylinder where it is impossible to obtain an elegant print. A vertical registration device that corrects misregistration, and a left and right registration device that corrects misregistration by moving in the left-right direction are provided (hereinafter referred to as a vertical registration device and a left and right registration device). Called).

  In the conventional vertical registration apparatus disclosed in Patent Document 1, the inner ends of the adjustment shafts radially attached to the plurality of grooves provided in the axial direction at the shaft ends of the plate cylinder are the shafts of the helical gears. The adjustment shaft is inserted in the inner sleeve of the adjustment sleeve and is pivotally attached to the inner end of the adjustment shaft so as to be eccentric from the axis of the adjustment shaft. As a result, the backlash between the helical gear and the plate cylinder shaft end when the helical gear moves in the axial direction is removed.

  This patent document does not describe the drive motor and the potentiometer, but the drive motor and the potentiator are connected to the plate cylinder shaft gear by a plurality of gears respectively. Due to this, misregistration occurred and the quality of printing deteriorated.

  In the left-right registering device disclosed in Patent Document 2, the shaft of the drive motor rotates a shaft having a screw shaft at one end via a speed reducer, and moves a bracket engaged with the screw shaft. The plate cylinder supported by the eccentric bearing connected to the bracket is moved. Since the potentiating portion (not shown) is connected to the plate cylinder shaft by a plurality of gears, misregistration occurs due to backlash between the gears, resulting in poor printing quality.

JP-A-6-126927 JP 11-314345 A

  In the registering devices disclosed in Patent Document 1 and Patent Document 2, there are restrictions on the mounting position of the potentiometer around the plate cylinder for measuring the top or the left and right phase angles of the plate cylinder, and the use of a plurality of gears. Rush was a problem.

  The present invention has been made in view of these problems, and its purpose is to integrate the drive motor and the potentiometer to reduce the number of gears related to zero point adjustment, backlash, vibration, etc. It is an object of the present invention to provide an apparatus for examining and combining printing presses that can be easily adjusted without being influenced by mechanical elements, improve the printing cortex, reduce the cost of equipment, and manually adjust the phase from the outside. .

  According to the present invention, on the one shaft (5a) side of the plate cylinder (5), the top and bottom direction registration motor (19) that performs the registration in the circumferential direction and the potentiometer (16 that detects the phase of the rotation angle). ) And a left-right direction registration motor (19) for performing axial registration of the plate cylinder (5) and an axial registration position on the other axis side (5b) of the plate cylinder (5). In a registration apparatus for a printing press provided with a potentiometer (16) for detection, the top and bottom direction registration motor (19) and a speed reducer (17) are connected to each other, and an angle is set to the speed reducer (17). A potentiometer (16) containing a sensor (27) is connected to integrate the top and bottom direction registration motor (19) and the potentiometer (16), and the left and right direction registration motor (19). And a reduction gear (17) are connected to each other, and the reduction gear (17) The potentiometer (16) containing the sensor (27) is connected, the horizontal registration motor (19) and the potentiometer (16) are integrated, and each potentiometer (16) is rotated manually. The potentiometer (16) adjusts the zero point while moving. The potentiometer (16) has an annular substrate (26) on which an angle sensor (27) is fixed, and a flange (32) provided on the cylindrical case (28). , And the flange portion (32) of the cylindrical case (28) is fixed to the casing (17a) of the speed reducer (17) with a screw (33) via a fixing bracket (34). 33) is loosened, the fixing bracket (34) is separated from the flange portion (32), and the cylindrical case (28) is manually rotated to set the reference zero point based on the phase angle of the angle sensor (27) from the outside. Nina And it has.

  According to the first aspect of the present invention, the motor and the speed reducer are connected so as to register in the vertical direction, the potentiometer including the angle sensor is connected to the speed reducer, and the motor and the speed reducer are registered in the left-right direction. And a potentiometer with a built-in angle sensor connected to the speed reducer, and the zero point adjustment is performed while manually rotating each potentiometer. This can be done directly with the integrated potentiometer, and can be easily and reliably registered without being affected by the mechanical factors such as gear back tension and vibration, and the cost of the equipment can be reduced.

  According to the second aspect of the present invention, the potentiometer part in which the flange part of the cylindrical case is pressed against the speed reducer by the fixing metal part is manually rotated by loosening the fixing metal part at the time of registration. The zero point can be adjusted freely from the outside of the case, and the operation is easy and quick.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic configuration diagram showing an embodiment of a registration device for a printing press according to the present invention, FIG. 2 is an enlarged view of a top and bottom registration adjusting device in the registration device of FIG. 1, and FIG. 3 is a registration of FIG. 4 is an enlarged view of the left and right register adjusting device in the meeting device, FIG. 4 is a sectional view of the structure of the potention unit and the speed reducer, and FIG.

  1 and 2, the registration device comprises a top-and-bottom direction registration device 1 and a left-right direction registration device 2, and is mounted on an eccentric bearing 4 fixed to both frames 3a and 3b of the single-sheet rotary press on the outer peripheral surface. A shaft of a plate cylinder 5 around which a printing plate (not shown) is wound and a shaft of a blanket cylinder 6 disposed so as to face the plate cylinder 5 are rotatably supported.

  A drive helical gear 7 is coaxially attached to the plate cylinder 5 via a slide key 9 on one shaft end 5a of the plate cylinder 5 inserted in the eccentric bearing 4 shown in FIG. An annular flange portion 8 extending in the radial direction is provided at the rear portion of the gear 7, that is, the portion far from the plate cylinder 5. The shaft center of the shaft end 5 a is eccentric with respect to the shaft center of the plate cylinder 5. The sliding key 9 is disposed between the shaft end 5a and the inside of the driving helical gear 7, and the driving fixes the helical gear 7 in the rotational direction while allowing it to move freely in the axial direction.

  As shown in FIG. 1, the driving helical gear 7 is meshed with the drive line shaft 10 and meshed with the helical gear 11 provided on the shaft of the adjacent blanket cylinder 6 to rotate the blanket cylinder 6.

  The drive of the plate cylinder 5 encloses the flange portion 8 of the helical gear 7 through the friction plates 12c and 12d, and has a dumbbell shape having a U-shaped portion 12a in cross section and an opening 12b in the center. A threaded gear 12 provided with a screw to be described later is disposed.

  A slight gap is formed between the annular inner peripheral surface of the flange portion 8 and the radially outer peripheral surface of the U-shaped portion 12a of the threaded gear 12, and the threaded gear 12 is always rotating during printing. Unlike the helical gear 7, it does not rotate except when it is necessary to register.

  A cylindrical ball screw 13 having a center opening is inserted into the center opening 12 b of the threaded gear 12, and the ball screw 13 and the threaded gear 12, preferably the ball screw 13 and the rear end portion of the threaded gear 12. Is screwed by a screw (not shown). Both the threaded gear 12 and the ball screw 13 are attached coaxially with the axis of the plate cylinder 5.

  A female screw 13b is formed in the central opening of the ball screw 13, a male screw 15b is formed on the shaft 15, and both screws 13b and 15b are screwed together.

  A shaft 15 for transmitting the phase adjustment amount adjusted by the top-and-bottom direction registration device 1 to the ball screw 13 on the outside of the subframe 14a supported by a support (not shown) fixed to the frame 3a of the printing press, and a potentiometer A reduction gear 17 provided with a portion 16 is fixed.

  The shaft 15 has a cylindrical shape, and is inserted into a bearing 18 fixed to the subframe 14a. A female screw 13b is screwed on the outer periphery of the front end portion of the plate cylinder 5 on the shaft 5a. The male screw 15b is screwed.

  A flange portion 15 f is provided behind the shaft 15 (in a direction away from the plate cylinder 5). The flange portion 15 f is abutted and fixed to a bearing 18 on the side of the subframe 14 a, and a plurality of the bearings 18 are implanted in the shaft 15. The key 18a.

  Therefore, the shaft 15 cannot be moved forward and backward and rotated and is fixed to the sub-frame 14a. When the ball screw 13 rotates, the female screw 13b of the ball screw 13 moves over the male screw 15b at the front portion of the shaft 15. Rotate and move in a spiral.

  The top-and-bottom direction registration device 1 includes a potentiometer 16, a speed reducer 17, and a drive motor 19.

  As shown in FIGS. 4 and 5, a gear group including a plurality of gears is provided in the main body of the speed reducer 17, that is, the case 17 a fixed to the subframe 14 a.

  That is, a worm gear 23 is attached to the tip of the drive shaft 22 of the drive motor 19, an intermediate gear 24 that is engaged perpendicularly to the worm gear 23, that is, a worm wheel is provided, and a worm gear coaxial with the intermediate gear 24 is intermediate. It is disposed so as to mesh with a worm gear 25 that is orthogonal to the gear 24 and attached to the output shaft 20. The speed reducer itself can be used without being limited to the illustrated example.

  A drive gear 21 is attached to the tip of the output shaft 20 of the speed reducer that has passed through the hole provided in the subframe 14a. As shown in FIG. Meshed.

  A drive motor 19 for driving the top and bottom registration device 1 is provided on the side of the speed reducer 17 in parallel with the subframe 14a.

  A potentiometer 16 is rotatably connected to the end of the speed reducer 17 on the side opposite to the output shaft 20. The potentiometer 16 includes an angle sensor 27 fixed to an annular substrate 26 having a hole in the center, a cylindrical case 28 that includes the angle sensor 27 and is closely fixed to the substrate 26, and the cylindrical case 28. The plug 31 is fixed to the outer periphery and connected by an angle sensor 27 and an electric cord.

The angle sensor 27 has an angle sensor shaft 29 penetrating the center hole of the substrate 26, and the angle sensor shaft 29 is fitted into a groove provided in the output shaft 20, and is connected to the output shaft 20 in the speed reducer 17. It is fixed with screws. In addition, an electrical cord 30 is connected between the angle sensor 27 for measuring the phase angle and the plug 31 provided on the side surface of the cylindrical case 28, and the plug 31 sends an electrical signal to a display unit (not shown). Yes.
The connection between the angle sensor shaft 29 and the output shaft 20 may be via a gear in order to increase the rotational speed of the angle sensor 27.

  The cylindrical case 28 has a bottomed shape, and an annular flange portion 32 is formed at an open end portion thereof. The outer peripheral inner surface of the flange portion 32 and the outer peripheral surface of the substrate 26 are closely fixed via a seal packing. Therefore, when the cylindrical case 28 is rotated, both the substrate 26 and the angle sensor shaft 29 can be rotated.

  Further, as shown in FIG. 5, the outer peripheral surface of the flange portion 32 of the cylindrical case 28 has an inner groove 34 a whose inner periphery is the same as the cylindrical case 28, and a plurality of screw insertion holes are formed. The inner groove 34a of the substantially semicircular fixing bracket 34 is fitted and fastened to the speed reducer main body 34a by screws 33 inserted into a plurality of screw insertion holes.

  A registration device 2 in the left-right direction shown in FIG. 3 is provided on the other operation side of the plate cylinder 5. The left-right direction registration device 2 partially uses members having the same configuration as the top-and-bottom direction registration device 1, and a detailed description of these members is omitted.

  A driving helical gear 40 is fixed to the other shaft end 5b of the plate cylinder 5 that is pivotally supported by the eccentric bearing 4 of the frame 3b of the printing press. A recessed flange portion 42 is formed in which a hole portion 41 facing the front end is cut in the center.

  A shaft 15 for transmitting the phase adjustment amount adjusted by the horizontal registration device 2 to the ball screw 13 on the outside of the sub-frame 14b supported by a column (not shown) fixed to the frame 3b of the printing press, A speed reducer 17 provided with a tension portion 16 is fixed.

  A male screw is screwed on the outer periphery of the shaft 15 inserted in the bearing 18 fixed to the subframe 14 b, and a female screw of the ball screw 13 is screwed to the shaft 15. A threaded gear 43 having a C-shaped annular flange 44 is fixed.

  The annular flange portion 44 at the tip of the threaded gear 43 is inserted into the concave portion 42 a of the flange portion 42 of the helical gear 40, and the radial outer peripheral surface of the flange portion 44 and the concave portion of the flange portion 42 are inserted. It is slightly spaced from the radially inner circumferential surface. Further, bearings 42 b and 42 c are provided on the facing surfaces of the side wall of the concave portion 42 a and the annular flange portion 44 at the tip of the threaded gear 43.

  The left-right direction registration device 2 includes a drive motor 19, a potentiometer 16, and a speed reducer 17, and a drive gear 21 is provided at the tip of the output shaft 20 of the speed reducer 17 penetrating a hole formed in the subframe 14b. Is fixed, and the drive gear 21 and the outer peripheral teeth of the threaded gear 43 are meshed. These configurations are the same as those of the vertical direction registration device 1.

  First, the operation of the top / bottom direction registration device 1 having the above-described configuration will be described.

  When the printing plate is mounted on the plate cylinder 5 and registration in the vertical direction is started, the phase angle of the angle sensor shaft 29 of the potentiometer 16 is set to the current value on the display unit (not shown) from the angle sensor 27 through the plug 31. Is displayed.

When the motor 19 is driven by turning on the drive motor 19 while looking at the numerical value of the displayed phase angle, the gear in the speed reducer 17 rotates to transmit the rotation to the drive gear 21 and meshes with the screwed gear 12. Rotate. What is the inner surface of the threaded gear 12 having a U-shaped cross-section, with the female thread of the ball screw 13 fixed to the threaded gear 12 spirally rotating on the male thread of the shaft 15 and moving forward or backward? The flange portion 8 of the helical gear 7 is pressed and integrated through the friction plates 12c and 12d, the helical gear 7 is moved to the left and right in the axial direction, and the plate cylinder 5 is moved in the circumferential direction to register the top and bottom. Align. When the display becomes the set value, the switch is turned off and the drive motor 19 is stopped.
Note that the rotation of the drive line shaft 10 normally rotates the plate cylinder via the helical gear 7.

  Next, in order to display that the transfer angle of the potentiometer 16 is deviated in the + or-direction and set a new reference zero point value, as shown in FIG. 6 to FIG. The screw 33 of the fixing bracket 34 that press-contacts the cylindrical case 28 to the case 17 a of the machine 17 is loosened, and the fixing bracket 34 is separated from the flange portion 31 of the cylindrical case 28.

  Then, since the cylindrical case 28 that has been fixed so far can be manually rotated, the cylindrical case 28 is manually rotated in either the left or right direction so that the scale comes to the reference zero point while viewing the display unit. .

  By the rotation of the cylindrical case 28, the phase angle of the angle sensor 27 fixed to the substrate 26 is also rotated by the same amount at the same time, and a new reference zero point value can be obtained. When the setting is completed, the flange portion 32 is covered with the fixing bracket 34, and the screw 33 is tightened again to fix the cylindrical case 28 to the speed reducer case 27a.

  Next, the operation of the left-right direction registration device 2 will be described.

  At the stage of trial printing before starting printing, the switch is turned on while viewing the displayed numerical value to drive the drive motor 19 and the drive gear 21 is rotated via the speed reducer 17. The ball screw 13 is advanced or retracted while rotating on the shaft 15 through the threaded gear 43 connected to the drive gear 21, and the side surface of the annular flange portion 44 of the threaded gear 43 is driven by a helical gear 40. It is made to contact | abut to the recessed flange part 42 of this.

  By this contact, the helical gear 40 moves forward or backward, and the plate cylinder 5 is moved to the left or right in the axial direction by the amount of the helical to perform registration in the left-right direction. When the display becomes a set value, the switch is turned off and the drive motor 19 is stopped.

  Thereafter, similarly to the above-described vertical registration, the screw 33 of the fixing bracket 34 is loosened, and the cylindrical case 28 is rotated by a predetermined amount to obtain a new reference zero point value. When the setting is completed, the flange 32 is covered with the fixing bracket 34, the screw 33 is tightened again, and the cylindrical case 28 is fixed to the speed reducer case 17a, and then printing is started.

1 is a schematic configuration diagram illustrating an embodiment of a registration apparatus for a printing press according to the present invention. The enlarged view of the top and bottom registration adjustment apparatus in the registration apparatus of FIG. The enlarged view of the right-and-left registration adjustment apparatus in the registration apparatus of FIG. Sectional drawing of the structure of a potention part and a reduction gear. The external appearance of a cylindrical case and a drive motor. The state figure which loosened the screw of a fixture. The state figure which rotates a cylindrical case. The state figure which fixed the cylindrical case with the fixture.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Top and bottom registration device 2 ... Left and right registration device 5 ... Plate cylinder 7 ... Helical gear 9 ... Sliding key 12 ... Screwed gear 13 ... Ball screw 15 ... Shaft 16 ... Potion part 17 ... Reducer 19 ... Drive motor 27 ... Angle sensor 28 ... Cylindrical case 34 ... Fixing bracket

Claims (1)

  On one side of the plate cylinder, there is a top-and-bottom direction registration motor that performs registration in the circumferential direction and a potentiometer that detects the phase of the rotation angle, and on the other axis side of the plate cylinder, In a registration device for a printing press in which a left-right direction registration motor for performing axial registration and a potentiometer for detecting an axial registration position are provided, the top-and-bottom direction registration motor and the reduction gear are provided. Connect the potentiometer with built-in angle sensor to the speed reducer to integrate the top and bottom direction registration motor and the potentiometer, and connect the left and right direction registration motor to the speed reducer. , The potentiometer with built-in angle sensor is connected to the reducer, the top and bottom direction registration motor and the potentiometer are integrated, and the zero point is adjusted while manually rotating each potentiometer. West The potentiometer closely contacts the flange part provided on the cylindrical case with the outer periphery of the annular substrate on which the angle sensor is fixed, and the flange part of the potentiometer is fixed to the casing of the speed reducer via a fixing bracket with a screw. The registration of the printing machine is characterized by loosening the screw at the time of registration, separating the fixing bracket from the flange, and manually rotating the cylindrical case to set the reference zero point based on the phase angle of the angle sensor from the outside. apparatus.

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