CN215625496U - Paper table device of printing machine - Google Patents

Abstract

The application provides a paper table device of a printing machine, which relates to the technical field of printing equipment and comprises a pre-feeding paper table and a positioning detection mechanism arranged on one side of the pre-feeding paper table, wherein a track driving mechanism is arranged at the bottom of the pre-feeding paper table to drive the pre-feeding paper table to move, and the positioning detection mechanism is used for detecting the position of paper placed on the pre-feeding paper table; the paper table device of the printing machine further comprises a controller, the controller is respectively electrically connected with the track driving mechanism and the positioning detection mechanism, the controller is used for controlling the track driving mechanism to drive the pre-feeding paper table to move and controlling the positioning detection mechanism to detect when the pre-feeding paper table moves to the first target position, and the controller is also used for controlling the pre-feeding paper table to move from the first target position to the second target position. Through the rail driving mechanism and the positioning detection mechanism, the automatic moving, the automatic positioning and the automatic detection of the pre-feeding paper table are realized, the production speed is improved, the labor cost and the time are saved, and the automatic control result is more accurate.

Description

Paper table device of printing machine

Technical Field

The application relates to the technical field of printing equipment, in particular to a paper table device of a printing machine.

Background

The printing machine generally has a pre-feeding system, which works according to the following principle: when the printing machine produces printing, the machine uses a table of paper to print, and the pre-feeding table can continue to prepare a table of paper for standby application under the condition of not influencing normal printing, and when the printing of the table of paper on the machine is finished, the operator lowers the table to the lowest-position track, removes the empty table with the paper removed, manually pushes the table of paper on the pre-feeding track to the paper conveying position of the printing machine, then raises the paper table, and continues to start printing.

The existing printing machines are operated manually, and one table of paper and the table are pushed together to move to enter the next procedure, so that the production efficiency is influenced; in addition, if the paper on the paper table of the existing printing machine is not orderly stacked, the printing machine cannot automatically identify, so that the printing rejection rate is high, and equipment failure is caused.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the application is to provide a printing machine paper table device, whether can discern the paper neatly put things in good order, and degree of automation is high.

In one aspect of the embodiment of the application, a paper table device of a printing machine is provided, which comprises a pre-feeding paper table and a positioning detection mechanism arranged on one side of the pre-feeding paper table, wherein a track driving mechanism is arranged at the bottom of the pre-feeding paper table to drive the pre-feeding paper table to move, and the positioning detection mechanism is used for detecting the position of paper placed on the pre-feeding paper table; the paper table device of the printing machine further comprises a controller, the controller is respectively electrically connected with the track driving mechanism and the positioning detection mechanism, the controller is used for controlling the track driving mechanism to drive the pre-feeding paper table to move, and controlling the positioning detection mechanism to detect when the pre-feeding paper table moves to a first target position, and the controller is further used for controlling the pre-feeding paper table to move to a second target position from the first target position.

Optionally, the track driving mechanism includes a track, a roller arranged on the track, a contact on the track, and a driving member for driving the roller to move, the driving member and the contact are electrically connected to the controller, the pre-feeding table is in contact with the contact, and the controller receives a contact signal of the contact to control the driving member to stop working.

Optionally, the positioning detection mechanism comprises two first stop levers arranged along a first direction and a second stop lever arranged along a second direction, the first direction is perpendicular to the second direction, the first stop lever and the second stop lever are driven by the driving mechanism to move relative to the paper feeding table, and the first stop lever and the second stop lever are located at positions on the paper feeding table in a limiting mode.

Optionally, the driving mechanism includes a first lead screw and a second lead screw which are perpendicular to each other, the first lead screw is connected to a first driving machine, the second lead screw is connected to a second driving machine, two first stop levers are screwed to the first lead screw, and a second stop lever is screwed to the second lead screw, and the positions of the first stop lever and the second stop lever are changed by rotation of the first lead screw and the second lead screw.

Optionally, scales are respectively arranged on the first lead screw and the second lead screw.

Optionally, the positioning detection mechanism further comprises a sensor, the position of the paper is detected by the sensor, and the sensor is electrically connected to the controller.

Optionally, the sensor includes two photoelectric sensors disposed on the first lead screw, and the two photoelectric sensors respectively detect sensing signals of two points corresponding to the paper and feed back the sensing signals to the controller.

Optionally, the device further comprises an alarm, the alarm is electrically connected with the controller, and the alarm gives an alarm when the detection result of the positioning detection mechanism exceeds a preset result threshold value.

Optionally, the system further comprises a control panel, wherein an operation button is arranged on the control panel, and the operation button is electrically connected with the controller.

Optionally, the first and second driving machines are electric machines.

According to the paper table device of the printing machine, a stack of neatly stacked paper is placed on the pre-feeding table, the rail driving mechanism is arranged at the bottom of the pre-feeding table, the controller controls the rail driving mechanism to drive the pre-feeding table to automatically move, the positioning detection mechanism is arranged on one side of the pre-feeding table and positions and detects the position of the paper on the pre-feeding table, firstly, the controller controls the rail driving mechanism to drive the pre-feeding table to move to a first target position, and then the pre-feeding table stops moving by controlling the rail driving mechanism; and then, the controller controls the positioning detection mechanism to position the paper on the pre-feeding table, then detects whether the positioned paper is stacked orderly or not, the positioning detection mechanism feeds the detection result back to the controller, the controller can compare the detection result with a preset result stored in the controller in advance, if the detection result detected by the positioning detection mechanism is within a preset result threshold value range, the detection result meets the requirement, the position of the paper on the pre-feeding table meets the requirement and the paper is stacked orderly, and at the moment, the controller controls the track driving mechanism to be restarted to drive the pre-feeding table to move to a second target position to perform the next process. Through the rail driving mechanism and the positioning detection mechanism, the automatic moving, the automatic positioning and the automatic detection of the pre-feeding paper table are realized, the production speed is improved, the labor cost and the time are saved, and the automatic control result is more accurate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of a paper table device of a printing press according to the present embodiment;

FIG. 2 is a schematic view of a partial structure of a paper table device of a printing press according to the present embodiment;

fig. 3 is a control schematic diagram of a paper table device of the printing press according to the present embodiment.

Icon: 10-pre-feeding a paper table; 101-paper; 20-track; 21-a roller; 22-a drive member; 23-a contact; 31-a first bar; 310-a first lead screw; 311-a first drive machine; 32-a second bar; 320-a second lead screw; 321-a second drive machine; 33-a photosensor; 40-a control panel; 41-a controller; 42-alarm.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when using, and are only used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

It should also be noted that, unless expressly stated or limited otherwise, the terms "disposed" and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The current printing machine can be divided into a monochromatic printing machine and a multicolor printing machine, a monochromatic printing machine paper conveying unit is not provided with a pre-feeding system, only one paper table is provided, the printing machine can directly feed paper, if the printing machine runs off the paper on the paper table, the printing machine operator is required to stop printing by the printing machine, then the paper table at the paper conveying part of the printing machine is lowered, the paper is laterally blocked and positioned, then a certain amount of paper is manually stacked on the paper table, the paper table is lifted to the proper position of the printing machine, and then the printing machine is started to print.

The multicolor printing machine is provided with a pre-feeding system, and the working principle of the multicolor printing machine is as follows: when the printing machine produces printing, the machine uses a table of paper to print, and the pre-feeding table can continue to prepare a table of paper for standby application under the condition of not influencing normal printing, and when the printing of the table of paper on the machine is finished, the operator lowers the table to the lowest-position track, removes the empty table with the paper removed, manually pushes the table of paper on the pre-feeding track to the paper conveying position of the printing machine, then raises the paper table, and continues to start printing. High speed printing presses are typically equipped with a simple pre-feeding system, the entire system being very simple, but all being manually operated, including moving on rails, is manually pushed by a person. A table of paper is pushed together with the table.

From the foregoing, it can be seen that the following disadvantages exist with current printing press designs: the manual paper feeding can cause long downtime of the printing machine, and the printing production efficiency can be obviously influenced for a long time; the multicolor printing machine is provided with a pre-feeding system, but almost all the multi-color printing machine is operated manually without an automatic system, and the problems of inaccurate positioning of a front stop gauge and a side stop gauge exist; whether the front parts of stacked paper are neat or not is judged by a worker, the worker needs to touch and feel whether the paper is neat or not by hands every time when stacking the paper, the paper is not neat once stacked, and when the printer prints, the uneven stacked paper can cause the situation that the paper conveyed by the printer is not smooth, so that the printing rejection rate is high, and equipment failure is caused.

To the shortcoming of above current printing machine, this application embodiment provides a printing machine paper platform device, improves production efficiency, save time, and the printing machine paper platform device that this application embodiment provided can realize automatic accurate control moreover, and is more accurate.

Specifically, referring to fig. 1, an embodiment of the present application provides a paper table apparatus of a printing press, including a pre-feeding paper table 10 and a positioning detection mechanism disposed on one side of the pre-feeding paper table 10, wherein a rail driving mechanism is disposed at the bottom of the pre-feeding paper table 10 to drive the pre-feeding paper table 10 to move, and the positioning detection mechanism is configured to detect a position of a paper sheet 101 disposed on the pre-feeding paper table 10; the paper table device of the printing machine further comprises a controller 41, the controller 41 is electrically connected with the track driving mechanism and the positioning detection mechanism respectively, the controller 41 is used for controlling the track driving mechanism to drive the pre-feeding paper table 10 to move and controlling the positioning detection mechanism to detect when the pre-feeding paper table 10 moves to the first target position, and the controller 41 is also used for controlling the pre-feeding paper table 10 to move from the first target position to the second target position.

The pre-feeding table 10 is used for stacking paper sheets 101, and generally, a plurality of paper sheets 101 are stacked and orderly stacked into a stack, and a rail driving mechanism is arranged at the bottom of the pre-feeding table 10, so that the pre-feeding table 10 automatically moves on the rail 20 through the rail driving mechanism without an operator manually pushing the pre-feeding table 10.

The positioning detection mechanism detects the position of the paper 101 on the pre-feeding table 10, and mainly detects whether the paper 101 is stacked in order.

The controller 41 is electrically connected to the track driving mechanism and the positioning detection mechanism, and is configured to achieve automatic movement and automatic detection of the pre-feeding table 10.

The specific process is as follows: the controller 41 controls the track driving mechanism to move the pre-feeding table 10 to the first target position along the track 20, and then controls the pre-feeding table 10 to stop moving; and then controlling the positioning detection mechanism to position and detect, positioning the paper 101 on the pre-feeding paper table 10, detecting whether the positioned paper 101 is stacked orderly or not, feeding the detection result back to the controller 41 by the positioning detection mechanism, comparing the detection result with the preset result by the controller 41, if the detection result is within the threshold range of the preset result, indicating that the detection result meets the requirement, and controlling the track driving mechanism to restart by the controller 41 at the moment so as to drive the pre-feeding paper table 10 to move to a second target position, wherein the second target position is the next process.

The controller 41 controls the track driving mechanism and the positioning detection mechanism, so that the automatic movement of the paper pre-feeding table 10 is realized, whether the paper 101 is stacked up neatly or not is automatically positioned and detected, and compared with the manual pushing of the paper pre-feeding table 10, the automatic paper pre-feeding device saves time and labor and improves the production efficiency.

In the paper table device of the printing machine provided by the embodiment of the application, a stack of neatly stacked paper 101 is placed on the pre-feeding table 10, a rail driving mechanism is arranged at the bottom of the pre-feeding table 10, the controller 41 controls the rail driving mechanism to drive the pre-feeding table 10 to automatically move, a positioning detection mechanism is arranged on one side of the pre-feeding table 10, and positions and detects the position of the paper 101 on the pre-feeding table 10, firstly, the controller 41 controls the rail driving mechanism to drive the pre-feeding table 10 to move to a first target position, and then the pre-feeding table 10 stops moving by controlling the rail driving mechanism; then, the controller 41 controls the positioning detection mechanism to position the paper 101 on the pre-feeding table 10, and then detects whether the positioned paper 101 is stacked in order, the positioning detection mechanism feeds the detection result back to the controller 41, the controller 41 compares the detection result with a preset result pre-stored in the controller 41, if the detection result detected by the positioning detection mechanism is within a preset result threshold range, it indicates that the detection result meets the requirement, the position of the paper 101 on the pre-feeding table 10 meets the requirement and the paper is stacked in order, at this time, the controller 41 controls the track driving mechanism to restart again, and drives the pre-feeding table 10 to move to a second target position to perform the next process. Through the rail driving mechanism and the positioning detection mechanism, the automatic movement, the automatic positioning and the automatic detection of the pre-feeding paper table 10 are realized, the production speed is improved, the labor cost and the time are saved, and the automatic control result is more accurate.

Further, as shown in fig. 2, the rail driving mechanism includes a rail 20, a roller 21 disposed on the rail 20, a contact 23 on the rail 20, and a driving member 22 for driving the roller 21 to move, the driving member 22 and the contact 23 are electrically connected to a controller 41, the paper feeding table 10 is in contact with the contact 23, and the controller 41 receives a contact signal of the contact 23 to control the driving member 22 to stop working.

The track 20 is provided with a roller 21, the roller 21 is arranged at the bottom of the pre-feeding table 10, the roller 21 is connected with a driving part 22, the controller 41 is electrically connected with the driving part 22, the driving part 22 can be a motor, the driving part 22 drives the roller 21 to rotate, so that the roller 21 drives the pre-feeding table 10 to move along the track 20, and the controller 41 controls the driving part 22 to start or stop to control the pre-feeding table 10 to move or stop moving.

In addition, the rail 20 is further provided with a contact 23, when the pre-feeding table 10 moves to the position of the contact 23, the pre-feeding table 10 is in contact with the contact 23, the contact 23 feeds a contact signal back to the controller 41, the controller 41 controls the driving member 22 to stop, at this time, the pre-feeding table 10 stops moving, and the pre-feeding table 10 stops at the first target position, so that subsequent positioning and detection of the paper 101 are facilitated.

The positioning detection mechanism comprises two first stop levers 31 arranged along a first direction and a second stop lever 32 arranged along a second direction, the first direction and the second direction are perpendicular to the moving direction of the pre-feeding paper table 10, the first stop levers 31 and the second stop levers 32 are driven by a driving mechanism to move relative to the pre-feeding paper table 10, and the positions of the paper 101 on the pre-feeding paper table 10 are limited by the first stop levers 31 and the second stop levers 32.

Illustratively, the first and second bars 31 and 32 are respectively located in the length and width directions of the sheet 101, the first bar 31 positioning the length direction of the sheet 101, and the second bar 32 positioning the width direction of the sheet 101.

The driving mechanism drives the first stop lever 31 and the second stop lever 32 to move, and the position of the paper 101 on the pre-feeding table 10 can be limited through the first stop lever 31 and the second stop lever 32, so that the position of the paper 101 on the pre-feeding table 10 meets the requirement.

When the pre-feeding table 10 stops after moving to the first target position, and at this time, by controlling the movement of the first stopper 31 and the second stopper 32, if the paper 101 is not stacked neatly, the paper 101 can be corrected in the length direction and the width direction of the paper 101 during the movement of the first stopper 31 and the second stopper 32, so that the paper 101 is stacked neatly.

The driving mechanism comprises a first lead screw 310 and a second stop lever 32 which are perpendicular to each other, the first lead screw 310 is connected with a first driving machine 311, the second stop lever 32 is connected with a second driving machine 321, the two first stop levers 31 are in threaded connection with the first lead screw 310, the second stop lever 32 is in threaded connection with the second stop lever 32, and the positions of the first stop lever 31 and the second stop lever 32 are changed through rotation of the first lead screw 310 and the second stop lever 32.

The two first stop levers 31 are connected to the first lead screw 310 in a threaded manner, the first lead screw 310 is connected to the first driving machine 311, the first driving machine 311 is electrically connected to the controller 41, and the first lead screw 310 is rotated by controlling the first driving machine 311, so that the first stop levers 31 can move along the first lead screw 310; similarly, the second stop lever 32 is connected to the second lead screw 320 in a threaded manner, the second lead screw 320 is connected to the second driving machine 321, the second driving machine 321 is electrically connected to the controller 41, the second lead screw 320 is rotated by controlling the second driving machine 321, and the second stop lever 32 can move along the second lead screw 320, so that the position of the paper 101 on the pre-feeding table 10 can be corrected by the movement of the first stop lever 31 and the second stop lever 32, and the paper 101 is positioned.

The first driving machine 311 and the second driving machine 321 can be motors, and the first lead screw 310 and the second stop lever 32 are driven to rotate by the rotation of the motors.

Scales are respectively arranged on the first lead screw 310 and the second stop lever 32, and the positions of the first stop lever 31 and the second stop lever 32 can be accurately judged through the scales for accurate positioning.

The positioning detection mechanism further comprises a sensor, and the position of the paper 101 is detected by the sensor, and the sensor is electrically connected with the controller 41.

After the paper 101 is positioned on the pre-feeding table 10 by the first stop lever 31 and the second stop lever 32, the offset of the paper 101 is further detected by the sensor, and if the paper 101 is stacked orderly, the offset should be zero, otherwise, the paper 101 is not stacked orderly.

Specifically, the sensors include two photoelectric sensors 33 disposed on the first lead screw 310, and the two photoelectric sensors 33 respectively detect sensing signals of two corresponding points of the paper 101 and feed the sensing signals back to the controller 41.

The first lead screw 310 is provided with two photoelectric sensors 33, the two photoelectric sensors 33 respectively correspond to two points on the paper 101, when the paper 101 is neatly stacked, the two photoelectric sensors 33 detect that the long sides of the paper 101 are in the same straight line, the stacking of the paper 101 is neat, if one paper 101 in the stacked paper 101 is out, and the stacking is not neat, the photoelectric signal of the photoelectric sensors 33 is blocked, the stacking of the paper stack 101 is not neat, at this time, the first stop lever 31 and the second stop lever 32 are controlled to move, the unstacked and neat paper 101 is corrected again, or manual direct sorting can be performed, and the paper 101 is stacked neatly.

As shown in fig. 3, the device further comprises an alarm 42, the alarm 42 is electrically connected to the controller 41, and when the detection result of the positioning detection mechanism exceeds a preset result threshold value, the alarm 42 gives an alarm.

For example, when the photoelectric signal of the photoelectric sensor 33 is blocked, the photoelectric signal is fed back to the controller 41, and when the controller 41 determines that the wad of paper 101 is not stacked in order, the controller 42 is controlled to alarm to remind an operator to intervene.

The alarm 42 may remind the operator in a manner of an alarm sound, or may remind the operator in a manner of a flashing red light, which is not specifically limited in this embodiment of the present application.

The device also comprises a control panel 40, wherein the control panel 40 is provided with operation buttons which are electrically connected with the controller 41.

An ON/OFF button can be arranged ON the control panel 40, and the control of starting or stopping of each mechanism is facilitated through the operation of the button.

In summary, in the paper table device of the printing press provided by the embodiment of the present application, the controller 41 controls the driving member 22 to drive the roller 21 through the buttons of the control panel 40, so that the pre-feeding table 10 runs on the track 20, and an operator does not need to manually push the pre-feeding table 10; for example, the pre-feeding table 10 has four rollers 21 on the rail 20, the driving machine may be a motor, and the rollers 21 electrically driven by the motor rotate, so that the pre-feeding table 10 automatically moves to a desired position, which saves time and labor. Meanwhile, the first stop lever 31 and the second stop lever 32 can move under the driving of a motor, when the sizes of the paper 101 are different, the first stop lever 31 is controlled to move along the scale on the first lead screw 310, and the second stop lever 32 moves along the scale on the second stop lever 32, so that the accuracy is improved. Be equipped with two photoelectric sensors 33 on first lead screw 310, its inductive head detects paper 101 perpendicularly downwards, make operating personnel give in advance when going up paper on paper platform 10, if in advance when the paper 101 on paper platform 10 is irregular with the limit that first pin 31 is close to, photoelectric sensor 33's feedback signal can in time send out alarm sound through alarm 42, remind the personnel of going up paper in time with paper 101 arrangement neatly, whole printing machine paper platform device realizes the automation, digital control, operating personnel only need on control panel 40 the button just can drive whole paper platform 10 automatically move in advance, and accomplish automatic positioning and detection.

In an embodiment of the application, aiming at the problem of low printing efficiency caused by no pre-feeding system in the printing process of a monochrome offset press, the paper feeding time can be saved, the production efficiency of the press can be improved, the function of automatically controlling the movement of the pre-feeding table 10 on the track 20 can be realized, when the pre-feeding table 10 is positioned by an operator, the first stop lever 31 and the second stop lever 32 realize the digital positioning function, the operation is more accurate and rapid, the downward photoelectric sensor 33 is arranged on the first lead screw 310, whether the paper 101 is out of order or out of order is detected by the detection head, the detection is carried out at any time in the paper feeding process of the operator, the alarm function is started when the paper is out of order, the operator is reminded of arranging the paper 101 in order in time, and the paper feeding operator can conveniently and accurately stack the paper 101 in order in time, the paper feeding device is more beneficial to smooth paper feeding of the printing machine and improves the production efficiency. The photoelectric sensor 33 automatically detects whether the paper 101 is tidy or not instead of manual touch detection, and is more reasonable, automatic and efficient.

The printing machine paper table device provided by the embodiment of the application can realize normal printing of a printing machine, under the condition that the existing printing process is not influenced, the pre-feeding paper table 10 can enable a printing operator to stack a piece of sub paper for standby, and after the paper 101 on the pre-feeding paper table 10 finishes one flow, the standby pre-feeding paper table 10 moves in place under the control of the driving part 22. The pre-feeding paper table 10 is continuously used for printing by the printing machine, the interval time between the whole replacement of the pre-feeding paper table 10 is only about 20-30 seconds, the printing production efficiency is greatly improved, and the problem that the existing single-color printing machine only has one paper feeding paper table and has low production efficiency of feeding paper after stopping for dozens of minutes is solved. And the idler wheel 21 of the track driving mechanism is driven by the motor, so that the labor is saved, and the automatic control is realized.

The specific operation process of the printing machine paper table device provided by the embodiment of the application is as follows: pressing a button of a motor of the track driving mechanism, driving the pre-feeding table 10 along with the motor, moving the pre-feeding table 10 to a fixed position of the printing machine, and automatically stopping at a first target position when a contact 23 at the tail of the track 20 is touched after the pre-feeding table 10 moves to the position in place; opening a button ON the control panel 40 to an ON position, setting the moving distance of the first stop lever 31 and the second stop lever 32 ON the screen of the control panel 40, for example, setting the moving distance of the second stop lever 32 to 780cm, automatically positioning the second stop lever 32 ON the second stop lever 32 to the position of 780cm by a motor, stopping and positioning, and automatically moving the first stop lever 31 to the setting position to automatically position; when the control button is turned off to the off position, the first and second levers 31 and 32 return to the zero position. When an operator puts paper on the pre-feeding table 10, a piece of paper is occasionally discharged, and the paper is not orderly fed, the photoelectric signal of the photoelectric sensor 33 on the first lead screw 310 is blocked, the alarm 42 immediately gives an alarm to remind the paper-feeding operator to arrange the irregular paper 101, and when the paper 101 is orderly, the photoelectric sensor 33 returns to normal.

Compared with the prior art, the paper table device of the printing machine provided by the embodiment of the application has the following advantages: the practicability is strong; the problem of low efficiency of paper feeding due to long-time halt is solved, the time is saved, and the printing production efficiency is greatly improved; the problem of labor waste in manual moving of the paper table is solved, and the functions that the track 20 is driven by electric power and the paper table 10 is moved automatically are realized; the first stop lever 31 and the second stop lever 32 are used for accurate digital positioning; the problem that the paper 101 is not tidy on the pre-feeding table 10 is solved, and automatic detection and alarm are achieved.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A printing press platen assembly, comprising: the paper pre-feeding device comprises a paper pre-feeding table and a positioning detection mechanism arranged on one side of the paper pre-feeding table, wherein a track driving mechanism is arranged at the bottom of the paper pre-feeding table to drive the paper pre-feeding table to move, and the positioning detection mechanism is used for detecting the position of paper placed on the paper pre-feeding table; the paper table device of the printing machine further comprises a controller, the controller is respectively electrically connected with the track driving mechanism and the positioning detection mechanism, the controller is used for controlling the track driving mechanism to drive the pre-feeding paper table to move, and controlling the positioning detection mechanism to detect when the pre-feeding paper table moves to a first target position, and the controller is further used for controlling the pre-feeding paper table to move to a second target position from the first target position.

2. The paper table device of the printing machine as claimed in claim 1, wherein the rail driving mechanism comprises a rail, a roller arranged on the rail, a contact on the rail and a driving member for driving the roller to move, the driving member and the contact are electrically connected with the controller, the pre-feeding table is in contact with the contact, and the controller receives a contact signal of the contact to control the driving member to stop working.

3. The paper table device of the printing machine as claimed in claim 1, wherein the positioning detection mechanism comprises two first stop levers arranged along a first direction and a second stop lever arranged along a second direction, the first direction, the second direction and the moving direction of the pre-feeding table are perpendicular to each other, the first stop levers and the second stop levers are driven by a driving mechanism to move relative to the pre-feeding table, and the position of the paper on the pre-feeding table is limited by the first stop levers and the second stop levers.

4. The paper table device of the printing machine according to claim 3, wherein the driving mechanism comprises a first lead screw and a second lead screw which are arranged vertically, the first lead screw is connected with a first driving machine, the second lead screw is connected with a second driving machine, two first stop levers are in threaded connection with the first lead screw, a second stop lever is in threaded connection with the second lead screw, and the positions of the first stop lever and the second stop lever are changed by the rotation of the first lead screw and the second lead screw.

5. A printer paper table apparatus as claimed in claim 4, in which the first and second screws are provided with respective graduations.

6. A printer paper table apparatus as claimed in claim 4, in which the registration detection mechanism further comprises a sensor by which the position of the paper is detected, the sensor being electrically connected to the controller.

7. The paper table device of the printing machine as claimed in claim 6, wherein the sensor comprises two photoelectric sensors arranged on the first lead screw, and the two photoelectric sensors respectively detect sensing signals of two corresponding points of the paper and feed back the sensing signals to the controller.

8. A printing press paper table device according to claim 1 or 7, further comprising an alarm, wherein the alarm is electrically connected with the controller, and when the detection result of the positioning detection mechanism exceeds a preset result threshold value, the alarm gives an alarm.

9. A printer paper table apparatus as claimed in claim 1, further comprising a control panel, said control panel having operating buttons, said operating buttons being electrically connected to said controller.

10. A printing press paper table device according to claim 4, characterised in that the first and second drive motors are electric motors.

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