CN104553260B - Printing machine overturning bar device and printing machine - Google Patents

Abstract

The invention provides a turning bar device of a printing machine and a printing machine. The device includes a base frame, a flip bar assembly for turning the front and back sides of the input paper tape, and a mounting seat fixed on the base frame for being fixedly installed on the main body of the printing machine, and also includes: adjusting The adjustment rod extends laterally and is fixed axially relative to at least one of the mounting seats. One end of the adjustment rod is screwed into the base frame so that the rotation of the adjustment rod drives the base frame. The frame moves relative to the adjusting rod. The turning bar device provided by the present invention can adjust the position of the turning bar assembly relative to the paper tape in the lateral direction through the adjustment rod, so that the two can return to the centered state, and the centering between the paper tape after turning and the paper tape before turning can be improved. , reducing the positive and negative lateral overprint deviation and improving the printing quality.

Description

Printing machine turning bar device and printing machine

technical field

The invention relates to printing equipment manufacturing technology, in particular to a printing machine turning bar device and a printing machine.

Background technique

During the double-sided printing process, the printing machine needs to use the flip bar device to realize the flip between the front and back of the paper.

Fig. 1 is a kind of flip bar device structure schematic diagram of prior art; As shown in Fig. Paper roller 12, and the guide roller 13 on the remaining any side, and the first turning bar 141 and the second turning bar 142 that are arranged between the paper-in roller 11 and the paper-out roller 12, the first turning bar 141 and the second turning bar The two reversing bars 142 are arranged up and down, and their extending directions intersect with each other to form an included angle of 45°. In a printing press, the reversing device is generally fixedly installed between two printing units. When the paper tape is output by a printing unit, it enters the paper input roller 11 of the reversing device, then bypasses the first reversing bar 141, and then bypasses the first reversing bar 141. The guide roller 13, after being output by the guide roller 13, is wound around the second overturning bar 142, it is converted into the form that the back side of the paper tape faces up and is output by the paper output roller along the original direction, and the second printing unit can be printed on the back side of the paper tape. to print.

During the printing process of the printing machine, it is necessary to ensure the centering of the paper tape and the paper-in roller and the paper-out roller (the longitudinal symmetry axis of the paper tape and the midpoint of the paper-in roller or the paper-out roller), because once the paper tape is relatively The paper input roller or paper output roller deviates, and after being turned over by the turning bar device, the deviation of the output paper tape relative to the original paper tape's conveying direction will be enlarged, resulting in a significant increase in the lateral overprint deviation of the front and back sides, which directly affects the printing. quality.

Contents of the invention

In view of the above-mentioned defects in the prior art, the present invention provides a printing press turning bar device and a printing machine, which can adjust the lateral position between the turning bar device and the paper tape, so that the paper tape and the turning bar assembly can be re-centered state.

The invention provides a turning bar device of a printing machine, which includes a base frame, a turning bar assembly for turning the front and back sides of an input paper tape, and a turning bar assembly fixed on the base frame for being fixedly installed on the main body of a printing machine. The mounting seat on the upper surface also includes: an adjustment rod, which extends laterally and is fixed axially relative to at least one of the mounting seats, and one end of the adjustment rod is screwed into the base frame to pass through the The rotation of the adjustment rod drives the base frame to move relative to the adjustment rod.

The present invention also provides a printing machine, comprising: a body, and the above-mentioned turning bar device of the printing machine fixedly connected to the body.

The turning bar device of printing machine and the printing machine provided by the present invention can adjust the position of the turning bar assembly relative to the paper tape in the horizontal direction through the adjustment rod, so that the two can return to the centered state, and the paper tape and the turning over after the turning are improved. The front centering reduces the horizontal overprint deviation of the front and back sides and improves the printing quality.

Description of drawings

Fig. 1 is a structural representation of a flip bar device of the prior art;

Fig. 2 is a perspective view of an angle of view of an embodiment of the flip bar device of the present invention;

Fig. 3 is the top view of Fig. 2;

Fig. 4 is the side view of Fig. 3;

FIG. 5 is a perspective view of another viewing angle of the embodiment shown in FIG. 2 .

detailed description

The "longitudinal" mentioned in the present invention refers to the moving direction of the paper tape when it enters the turning bar device or the moving direction of the paper tape when it is output by the turning bar device, and "horizontal" refers to the direction in which the paper tape is in the same plane as the " Portrait" Vertical orientation.

Fig. 2 is a perspective view of an embodiment of the turning bar device of the present invention; Fig. 3 is a top view of Fig. 2; Fig. 4 is a side view of Fig. 3; please refer to Fig. 2-4, this embodiment provides a printing machine turning bar The device includes a base frame 20, a flip bar assembly 30 for turning the front and back sides of the input tape, and a mounting seat 21 fixed on the base frame 20 for fixedly installing on the main body of the printing machine; also includes : Adjusting rod 31, the adjusting rod 31 extends laterally and is fixed axially relative to the mounting base 21, one end of the adjusting rod 31 is screwed in the base frame 20, so that the base frame 21 is relatively adjusted by the rotation of the adjusting rod 31 to drive the adjusting rod 31 move.

Specifically, the base frame 20 can be a plate-shaped or frame-shaped installation base for installing the flip bar assembly 30, paper input roller, paper output roller, etc., and a plurality of mounting seats 21 can be fixedly arranged on the base frame 20 to The corresponding position on the machine body of the printing machine is fixedly installed through the mounting base 21 . This embodiment does not specifically limit the specific composition and structure of the flip bar assembly 30 , which can be various specific forms commonly used in the art that can realize paper tape flipping.

A threaded hole for installing the adjusting rod 31 can be provided on the base frame 20, and the threaded hole can extend laterally; wherein, when the base frame 20 is provided with a paper-feeding roller, the axial direction of the paper-feeding roller is parallel to the transverse direction, and the screw thread The extension direction of the hole should be parallel to the paper-feeding roller, so that the adjusting rod 31 is screwed into the threaded hole to ensure that the adjusting rod 31 extends laterally like the threaded hole.

Further, the fact that the adjustment rod 31 and the installation base 21 are axially relatively fixed means that the adjustment rod 31 cannot move in the axial direction relative to the installation base 21 , but can only rotate. Specifically, the axial fixation of the adjusting rod 31 can be directly achieved through the installation seat 21 , or can be achieved by arranging other components.

For example, the turning device of the printing press in this embodiment may include a first connecting rod 41 for axially fixing the adjusting rod 31, and the first connecting rod 41 is fixedly connected with the mounting base 21, for example, may be welded and fixed on the mounting base 21; A positioning part is formed on the rod 31, and a positioning part for cooperating with the positioning part to axially stop the adjusting rod 31 can be provided on the first connecting rod 41; wherein, the positioning part can be an annular groove formed on the surface of the adjusting rod 31, Correspondingly, the positioning member can be fixed on the first connecting rod 41, corresponding to the position of the annular groove of the first connecting rod 41, and the retaining ring can be just sleeved around the annular groove, and through the retaining ring and The size of the annular groove matches the stop adjusting rod 31 to prevent axial displacement between the adjusting rod 31 and the first connecting rod 41 .

As can be seen from the above, since the adjustment rod 31 is not limited in the circumferential direction, when the adjustment rod 31 is screwed, the adjustment rod 31 can rotate, and at the same time, the threaded cooperation between the adjustment rod 31 and the base frame 20 makes the base frame 20 Relative movement in the axial direction is sent between the adjusting rod 31 and the adjusting rod 31 and the mounting base 21 are relatively fixed in the axial direction, so this relative movement is manifested as a lateral movement of the base frame 20 relative to the mounting base 21 . Therefore, when the adjustment lever 31 is screwed, the adjustment base frame 20 and the flip bar assembly 30 on it can be moved laterally relative to the mounting seat 21, while the mounting seat 21 is fixed to the main body of the printing machine, thereby realizing the flip bar assembly 30 lateral movement relative to the main body of the printing press.

The turning bar device of the printing press of this embodiment is fixedly installed on the main body of the printing machine through the mounting seat 21 when in use, wherein the main body of the printing machine is also fixedly installed with a printing unit and a paper roll, etc. During the printing process, the paper tape passes through the printing unit Enter the turning bar device from one side, and output from the other side, and turn from the front to the back at the same time, and then enter another printing unit. In this process, it is necessary to ensure that the centerline of longitudinal symmetry of the paper tape is centered with the midpoint of the entrance side of the flip bar assembly 30, but external interference, paper tension and other reasons can easily cause the paper tape to be in the middle of the flip bar device relative to the flip bar. If there is an offset in the lateral direction, the position of the flipping lever device in the horizontal direction relative to the main body of the printing machine can be adjusted by twisting the adjusting lever 31, that is, the position of the paper tape remains unchanged, and the position of the flipping lever assembly is adjusted along the horizontal direction to make the paper roll. Belt and rollover bar assembly realigned.

The turning bar device provided in this embodiment can adjust the position of the turning bar assembly relative to the paper tape in the horizontal direction through the adjustment rod, so that the two can return to the centered state, and the centering between the paper tape after turning and the paper tape before turning can be improved. It reduces the lateral overprint deviation of the front and back sides and improves the printing quality.

On the basis of the above-mentioned embodiments, the following structural form can also be adopted to realize the axial fixation between the adjusting rod 31 and the mounting seat 21 .

Specifically, the adjusting rod 31 is formed with a threaded section for being screwed onto the base frame 20; the positioning part is a stepped section formed on the adjusting rod 31 outside the threaded section, and the diameter of the side of the stepped section away from the threaded section can be larger than that close to the threaded section. One side of the threaded section, that is, the positioning part of the outer end of the adjusting rod 31 can be divided into multi-section rods with different diameters to form a step at the sudden change in the shaft diameter; the positioning part is a connecting sleeve fixedly connected to one end of the first connecting rod 41 411, the connecting sleeve 411 has a stepped hole matching the stepped section, the stepped section of the adjusting rod 31 is passed through the stepped hole, so as to pass through the step formed by the sudden change in the diameter of the stepped hole and the step at the stepped section of the adjusting rod 31 The stop function between them realizes the limitation of the axial position of the adjustment rod 31. In addition, the turning lever device can also include a thrust bearing installed between the adjusting rod 31 and the connecting sleeve 411, wherein the thrust bearing 412 can be two, respectively arranged at both ends of the connecting sleeve 411, so that the thrust bearing 412 The friction between the stepped section of the adjusting rod 31 and the stepped hole is effectively relieved during the rotation of the adjusting rod 31 relative to the connecting sleeve.

Further, as shown in FIG. 2 and FIG. 5 , the above-mentioned overturning bar device may also include a second connecting rod 42; correspondingly, there may be an even number of mounting seats 21, and they may be located on opposite side edges of the base frame 20 respectively. Arranged in a straight line, for example, there can be four, two are arranged on one side of the base frame 20, and the other two are arranged on the other side of the base frame 20, wherein, the two ends of the first connecting rod 41 can be respectively fixed through the On the two mounting bases 21 on the same side, the second connecting rod 42 can be respectively fixed and passed through the two mounting bases 21 on the other side, and the relative position between the mounting bases 21 can be reasonably set to ensure that the first connecting rod 41 and the second connecting rod 42 are parallel to each other; and, the first connecting rod 41 and the second connecting rod 42 can be supported on the base frame 20 through at least one linear bearing 32 respectively. In this way, the linear bearing 32 plays a good supporting role, and at the same time, when the base frame 20 moves laterally relative to the mounting seat 21 under the drive of the rotating adjustment rod 31, the first connecting rod 41 extending laterally and the second connecting rod 41 all extend horizontally. The rod 42 can serve as an auxiliary guide for the movement of the base frame 20, and the linear bearing 32 can also effectively reduce the friction on the first connecting rod 41 and the second connecting rod 42 to ensure that they are not worn and further ensure that the base frame 20 Accurate and reliable lateral movement.

Furthermore, an adjustment handle 33 may be fixedly provided at the end of the adjustment rod 31 away from the base frame 20 , and a dial for indicating the rotation angle may also be provided on the adjustment handle 33 . Wherein, the dial can be coaxially fixed on the end face of the adjusting handle 33, and the center of the dial can be fixedly provided with an indicator needle that rotates coaxially with the adjusting rod 31. When the adjusting handle 33 rotates, the indicating needle turns over the same The angle of the adjustment handle can be obtained by changing the scale indicated by the indicator needle, and this value is the actual angle of rotation of the adjustment rod 31; furthermore, it can be accurately calculated according to the pitch of the thread section of the adjustment rod 31 The distance that the base frame 20 moves laterally together with the flip bar assembly 30 . As a result, the amount of lateral adjustment can be controlled more precisely, and the accuracy of lateral overprinting can be further improved.

During the working process of the printing press, another factor affecting the accuracy of overprinting is the tension of the paper tape. When the tension on the paper tape is too large, it will cause the paper tape to wrinkle longitudinally, and the overprinting accuracy will decrease; and when the tension on the paper tape exceeds a certain value, it will cause the paper tape to break; especially in the front and back printing process After the paper tape passes through the flip bar device, after the front and back are turned over, due to the friction factor, the front and rear tension changes relatively large, which will cause the paper tape tension to exceed or fall below a specific value.

Another embodiment of the present invention provides a turning bar device of a printing machine, which adjusts the tension of the paper tape by adding a tension roller on the basis of the above embodiments. As shown in Figures 2-5, the base frame 20 in the above-mentioned embodiment of the base frame 20 can be a rectangular frame surrounded by two beams 201 and two longitudinal beams 202; The paper input roller 11, the paper output roller 12 on the top, the tension roller 23 arranged on a longitudinal beam, and the first turning bar 141 and the second turning bar 142 arranged in the space surrounded by the beam 201 and the longitudinal beam 202; The first overturning bar 141 and the second overturning bar 142 are set up and down and form an included angle of 45°; the overturning bar device of this embodiment can also include a servo motor 24 fixedly arranged on the base frame 20, and an output shaft of the servo motor 24 It can be fixedly connected with the tension roller 23 through a shaft coupling, so as to drive the tension roller 23 to rotate forward or backward through the servo motor 24 .

Wherein, the two ends of the output roller 12 and the input roller 11 can be rotatably fixed on the crossbeam 201, and the two ends of the first turning bar 141 and the second turning bar 142 can be fixedly connected to the crossbeam 201 and the longitudinal beam 202 respectively. Connection; after the paper tape passes the input roller 11 with the front facing up, it can go around the first turning bar 141 from bottom to top, convert the paper tape to the back side up, and then go around the tension roller 23 from top to bottom , and then bypass the second overturning bar 142 from bottom to top, and finally output through the paper output roller 12 in the form of the reverse side facing up, realizing the overturning of the paper tape.

The process of adjusting the tape tension by the turning bar device of the printing press in this embodiment is as follows: when the tension of the paper tape entering the turning bar device is less than the tension of the paper tape output by the turning bar device (the paper can be judged by observing the degree of tightness of the paper tape). The size of the tape tension, the tighter the paper tape, the greater the tension), can control the servo motor 24 to rotate in the same direction as the paper tape bypasses the tension roller 23 to increase the output paper tape tension; when entering the overturn bar When the paper tape tension of the device is greater than the paper tape tension output by the flip bar device, the servo motor 24 can be controlled to rotate in the opposite direction to the paper tape around the tension roller 23, so as to reduce the output paper tape tension, so as to adjust the paper tape tension. The tension before and after the tape is turned over ensures that the tension of the paper tape is controlled within a specific range and improves the overprinting accuracy.

On the basis of the above, the tension roller 23 can be rotatably arranged on the base frame 20; that is, the base frame 20 can be fixedly provided with two supporting seats 231, and the tension roller 23 is rotatably supported on the supporting seats 231 by supporting bearings. , and the outer end of the support bearing of the support seat is also provided with a bearing cover for axially fixing the tension roller, which ensures that the position of the tension roller 23 is fixed relative to the base frame 20, and at the same time ensures the rotation of the tension roller, reducing the impact of repeated rotation. Wear of the tension roller.

Preferably, for the scenario where tension detection rollers are respectively provided before and after the turning bar device of the printing press on the printing press, the turning bar device of the printing press may also include a controller for Tension and paper tape tension control servo motor on the side of the paper exit roller 12 rotates 24 corresponding angles to adjust the tension of the paper tape. Specifically, the controller can acquire the tension of the paper tape from the tension detection roller, make a comparison, and control the servo motor to rotate forward or reverse by a corresponding angle according to the comparison result.

Another embodiment of the present invention also provides a printing machine, including: a main body of the printing machine, and the turning bar device of the printing machine as described in any embodiment above, which is fixedly connected to the main body of the printing machine. The seat 21 is screwed or welded and fixed to the main body of the printing machine. Wherein, the specific structure and function of the turning bar device of the printing machine are similar to those of the foregoing embodiments, and will not be repeated here.

In the printing machine provided by this embodiment, the position of the turning bar device relative to the paper tape can be adjusted in the horizontal direction through the adjusting lever in the turning bar device, so that the two can return to the centered state, and the paper tape after turning and turning can be improved. The front centering reduces the horizontal overprint deviation of the front and back sides and improves the printing quality.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (9)

1. a kind of printer rollover bar device, including pedestal, the rollover bar group for the positive and negative of the paper tape of input to be overturn Part, and it is fixed on mounting seat on the pedestal, for being fixedly installed in printer main body, it is characterised in that also wrap Include：Adjusting rod, the adjusting rod extend transversely and with the axially opposing fixation of mounting seat described at least one, the adjusting rod One end be bolted in the pedestal, to be moved relative to the adjusting rod by the pedestal that rotarily drives of the adjusting rod；

Also include that, for the head rod of adjusting rod described in axial restraint, the head rod is installed with described at least one Seat is fixedly connected；Location division is formed with the adjusting rod, it is described fixed for coordinating to be fixedly installed on the head rod The keeper of adjusting rod described in position portion axial stop.

2. printer rollover bar device according to claim 1, it is characterised in that be formed with for spiral shell on the adjusting rod The thread segment being connected on pedestal；The location division is the ladder section for being formed at the adjusting rod on the outside of the thread segment, and The ladder section is away from the side of the thread segment with diameter greater than near the side of the thread segment；The head rod is parallel In the adjusting rod, the keeper is the branch sleeve for being fixedly connected on described head rod one end, the branch sleeve With a shoulder hole matched with the ladder section, the ladder section of the adjusting rod is arranged in the shoulder hole.

3. printer rollover bar device according to claim 2, it is characterised in that also include being arranged on the adjusting rod with Thrust bearing between the branch sleeve, the thrust bearing is two, is respectively arranged at the two ends of the branch sleeve.

4. the printer rollover bar device according to claim 1-3 any one, it is characterised in that also include parallel to institute State the second connecting rod of head rod setting；Respectively fixation is arranged in one at the two ends of the head rod and the second connecting rod To in mounting seat, and the head rod and the second connecting rod also by least one linear bearing are supported on the base respectively On frame.

5. the printer rollover bar device according to claim 1-3 any one, it is characterised in that the adjusting rod deviates from One end of the pedestal is further fixedly arranged on regulation handle, and the scale for turning over angle for instruction is additionally provided with the regulation handle Disk.

6. the printer rollover bar device according to claim 1-3 any one, it is characterised in that the pedestal is by two The rectangle frame that crossbeam and two longerons are surrounded；The rollover bar component includes being separately positioned on two crossbeams entering paper Roller, exit roller, the jockey pulley being arranged on a longeron, and be arranged in the space that the crossbeam and longeron are surrounded First rollover bar and the second rollover bar；First rollover bar and the angle that the second rollover bar is setting up and down and shape is at 45 °；Also Including the servomotor being fixedly installed on the pedestal, the output shaft of the servomotor is fixedly connected with the jockey pulley.

7. printer rollover bar device according to claim 6, it is characterised in that two are fixedly installed on the pedestal Support base, the jockey pulley is pivotally supported on the support base by spring bearing, and spring bearing outer end also sets up Have for the bearing cap of jockey pulley described in axial restraint.

8. printer rollover bar device according to claim 6, it is characterised in that also including a controller, for basis The web tension and outlet roller side web tension of current input roller side controls the servomotor and turns over corresponding angle, to adjust The tension force of the paper tape.

9. a kind of printer, including：Body, and be fixedly connected on it is on the body, such as claim 1-8 any one institute The printer rollover bar device stated.