A printing machine table positioning device

Abstract

This utility model discloses a printing machine table positioning device, including a printing machine frame and a table assembly. A main track is installed on the printing machine frame. The table assembly includes a printing plate, a printing arm installed at the bottom of the printing plate, a sliding assembly, and a positioning assembly. The sliding assembly includes a sliding seat connected to the printing arm at its upper end, a transmission rack installed on one side of the sliding seat, and a track wheel assembly installed inside the sliding seat. The table assembly is slidably connected to the main track on the printing machine frame through the track wheel assembly. The piston rod of the positioning cylinder pushes the first end of the positioning plate to rotate synchronously with the positioning shaft fastened to the positioning plate. The second end of the positioning plate abuts against the limiting block located between two limiting bearings, restricting the movement of the table assembly. This utility model has a simple structure, low failure rate, convenient adjustment, high wear resistance, and high repeatability positioning accuracy.

Description

Technical Field

[0001] This utility model relates to the field of printing machine technology, and specifically to a table positioning device for a printing machine. Background Technology

[0002] A printing machine is a widely used piece of equipment in industries such as textiles, clothing, home furnishings, and advertising. It is mainly used to print patterns, text, or logos on the surface of various materials. An oval printing machine is a type of printing machine whose core feature is its printing platform designed with elliptical (or circular) guide rails, distinguishing it from traditional flat or roller-type structures.

[0003] The printing plate is an important component of a printing machine. It provides a flat support surface for printing materials such as fabric, paper, and plastic, ensuring that the materials do not shift or deform during the printing process.

[0004] In existing printing machines, the table positioning device has a complex structure, high failure rate, is difficult to adjust, is prone to wear, and has low repeatability and positioning accuracy. Utility Model Content

[0005] In order to overcome at least one of the technical problems existing in the prior art, this utility model provides a printing machine table positioning device, which has a simple structure, low failure rate, convenient adjustment, wear resistance and high repeatability positioning accuracy.

[0006] A printing machine table positioning device includes a printing machine frame and a table assembly. A main track is installed on the printing machine frame. The table assembly includes a printing table, a printing arm installed at the bottom of the printing table, a sliding component, and a positioning component.

[0007] The sliding assembly includes a sliding seat connected to the printing arm at the upper end, a transmission rack installed on one side of the sliding seat, and a set of track wheels installed inside the sliding seat. The table assembly is slidably connected to the main track located on the printing machine frame through the set of track wheels.

[0008] The positioning assembly includes a positioning bracket installed on one side of the printing machine frame. The positioning bracket is connected to the inner wall of the sliding seat via a positioning slider. Positioning bearing seats are installed at both ends of the positioning bracket, and positioning bearings are installed inside the positioning bearing seats. The assembly also includes a positioning shaft, the two ends of which pass through the positioning bracket and are connected to the two positioning bearings. A positioning plate is installed on the positioning shaft. A positioning connecting rod is installed at the first end of the positioning plate. The positioning connecting rod is connected to the piston rod of the positioning cylinder installed on the printing machine frame. A sensor is installed on the positioning cylinder. The second end of the positioning plate extends into the sliding seat. A limit block is also installed in the sliding seat, and two limit bearings are installed side by side on both sides of the limit block.

[0009] The piston rod of the positioning cylinder pushes the first end of the positioning plate to rotate synchronously with the positioning shaft fastened to the positioning plate. The second end of the positioning plate abuts against the limit block located between the two limit bearings, restricting the movement of the platform assembly.

[0010] In some embodiments, the track wheel set consists of two sets arranged side by side, each set including two track wheels arranged side by side on both sides of the main track, one being a concentric track wheel and the other an eccentric track wheel, and each track wheel having an annular groove along the circumference.

[0011] In some embodiments, two limit bearings are each mounted side-by-side at the bottom of a limit bearing housing via a limit shaft, and the limit bearing housing is mounted inside a sliding seat; of the two limit bearings, one is a concentric shaft bearing and the other is an eccentric shaft bearing.

[0012] In some embodiments, two slider adjustment holes are provided side by side on the side wall of the sliding seat, the slider fastener passes through the slider adjustment hole and is fastened to one side of the positioning slider, and the bottom of the positioning slider is fastened to the positioning bracket by the slider limiting member.

[0013] In some embodiments, the positioning plate includes a connecting seat disposed at a first end and having an opening, a positioning link inserted into the connecting seat through the opening, and the positioning link connected to the connecting seat by a pin; the positioning shaft passes through the shaft hole of the positioning plate, and also includes a locking plate with one end connected to the positioning plate, a slot being formed between the locking plate and the positioning plate, the first end of the slot communicating with the shaft hole, the second end of the slot having a notch, the second end of the locking plate being fastened to the positioning plate by a screw, and the positioning shaft being fastened in the shaft hole.

[0014] In some embodiments, the positioning bearing is a tapered bearing, and radial nuts are threaded to both ends of the positioning shaft to secure the tapered bearing in the positioning bearing housing.

[0015] In some embodiments, two pneumatic throttle valves are installed on the positioning cylinder to adjust the speed of the positioning cylinder's movement.

[0016] Compared with the prior art, the technical solution of this utility model has the following advantages:

[0017] 1. The piston rod of the positioning cylinder pushes the first end of the positioning plate to rotate synchronously with the positioning shaft fastened to the positioning plate. The second end of the positioning plate abuts against the limiting block located between the two limiting bearings, restricting the movement of the platen assembly. The limiting block can restrict the movement of the printing platen or release the printing platen to restore its mobility.

[0018] 2. Each plate assembly is equipped with an independent positioning component to solve the problem of the entire printing machine stopping due to the failure of a certain positioning component, thus avoiding production disruption. It can also be selected for separate positioning when printing fewer colors to reduce energy consumption and noise.

[0019] 3. The concentric track wheels in the track wheel assembly ensure that each printing plate is in the same position, while the eccentric track wheels can adjust the fit with the main track.

[0020] IV. The two limit bearings can rotate, which reduces the impact force with the positioning plate and solves the service life problem; the concentric shaft bearing can ensure the positioning accuracy of the positioning plate every time and has high repeatability of the printing plate; by adjusting the eccentric shaft bearing, the wear gap between the positioning plate and the bearing can be solved, and the compatibility between the two can be improved.

[0021] 5. By adjusting the slider fasteners and slider limiters, the problem of wear clearance of the track wheel assembly affecting printing accuracy can be solved.

[0022] 6. Adjusting the radial nut can solve the bearing wear clearance problem, eliminating the need to replace related components after many years of use and reducing user costs.

[0023] Additional aspects and advantages of this invention will continue to be set forth in the description which follows, and in part will be obvious from the description or may be learned by practice of this invention. Attached Figure Description

[0024] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 This is a three-dimensional structural diagram of the present application when installed on a printing machine;

[0026] Figure 2 This is a schematic diagram of the planar structure of the present application when installed on a printing machine;

[0027] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 This is a bottom-view schematic diagram of the platform assembly and sliding assembly.

[0029] Figure 5 yes Figure 4 Enlarged view of point B in the middle;

[0030] Figure 6 yes Figure 5 A schematic diagram of the three-dimensional structure viewed from below;

[0031] Figure 7 This is a top-view three-dimensional structural diagram of the sliding component and the positioning component;

[0032] Figure 8 yes Figure 7 A schematic diagram of the split structure;

[0033] Figure 9 yes Figure 7 Front view plan structural diagram;

[0034] Figure 10 This is a schematic diagram of the main 3D structure of the positioning component;

[0035] Figure 11 This is a rear-view 3D structural diagram of the positioning component;

[0036] Figure 12 This is a schematic diagram of the three-dimensional structure of the positioning plate.

[0037] Figure label:

[0038] Printing machine frame 1, table assembly 2, printing table 200, printing arm 201;

[0039] Main track 3, sliding component 4;

[0040] Sliding seat 400, transmission rack 401, track wheel set 402, track wheel 4020, annular groove 4021, slider adjustment hole 403, slider fastener 404, slider limiting component 405;

[0041] Positioning component 5;

[0042] Positioning bracket 500, positioning slider 501, positioning bearing seat 502, positioning bearing 503, positioning shaft 504;

[0043] Positioning plate 505;

[0044] Opening 5050, connecting seat 5051, pin 5052, shaft hole 5053, locking plate 5054, slot 5055, notch 5056, screw connector 5057;

[0045] Positioning link 506, positioning cylinder 507, pneumatic throttle valve 5070, sensor 508, limit block 509, limit bearing 510, limit shaft 511, limit bearing seat 512, radial nut 513. Detailed Implementation

[0046] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0047] In the description of this utility model, it should be understood that the directional descriptions, such as the terms "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0048] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0049] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0050] Reference Figures 1-12 A printing machine table positioning device includes a printing machine frame 1 and a plurality of table assemblies 2 arranged in sequence. A main track 3 is installed on the printing machine frame 1. The table assembly 2 includes a printing table 200, a printing arm 201 installed at the bottom of the printing table 200 for supporting the printing table 200, and also includes a sliding assembly 4 and a positioning assembly 5.

[0051] The sliding assembly 4 includes a sliding seat 400 connected to the printing arm 201 at its upper end, a transmission rack 401 installed on one side of the sliding seat 400, and a track wheel set 402 installed inside the sliding seat 400. The table assembly 2 is slidably connected to the main track 3 located on the printing machine frame 1 through the track wheel set 402. When the printing machine is working, the motor drives the gear to rotate, and the gear meshes with the transmission rack 401, driving the table assembly 2 to move along the main track 3.

[0052] Positioning assembly 5 includes a positioning bracket 500 mounted on one side of the printing machine frame 1. The positioning bracket 500 is connected to the inner wall of the sliding seat 400 via a positioning slider 501. Positioning bearing seats 502 are mounted at both ends of the positioning bracket 500, and positioning bearings 503 are installed inside the positioning bearing seats 502. It also includes a positioning shaft 504, whose two ends pass through the positioning bracket 500 and are connected to the two positioning bearings 503. A positioning plate 505 is mounted on the positioning shaft 504, and a positioning connecting rod 506 is mounted at the first end of the positioning plate 505. The positioning connecting rod 506 is connected to the mounting plate 504. The piston rod of the positioning cylinder 507 on the printing machine frame 1 is connected. The positioning cylinder 507 and the positioning connecting rod 506 are installed parallel to the horizontal plane. Two sensors 508 are installed in the slot of the positioning cylinder 507. Magnetic switches can be used to detect the fully retracted and fully extended positions of the positioning piston to determine the initial position and printing position of the printing plate 200. The second end of the positioning plate 505 extends into the sliding seat 400. The sliding seat 400 is also equipped with a limit block 509 and two limit bearings 510 installed side by side on both sides of the limit block 509.

[0053] In operation, the motor drives the gear to rotate, and the gear meshes with the transmission rack 401, driving the printing plate assembly 2 to move along the main track 3. When the printing plate 200 moves to the printing position, one of the sensors 508 sends a signal, and the piston rod of the positioning cylinder 507 pushes the first end (i.e., the lower end) of the positioning plate 505 to rotate synchronously with the positioning shaft 504 fastened to the positioning plate 505. The second end (i.e., the upper end) of the positioning plate 505 passes through two limit bearings 510 and then abuts against the limit block 509 located at the rear end between the two limit bearings 510, restricting the movement of the printing plate assembly 2. At the same time, appropriate pressure is applied to the sliding seat 400 to make the track wheel assembly 402 fit against the main track 3, further preventing displacement. Then, another sensor 508 sends a signal, and the printing actuator begins to scrape. During printing, once the set number of prints is completed, the piston rod pulled by the positioning cylinder 507 pulls the first end (lower end) of the positioning plate 505, which rotates synchronously with the positioning shaft 504 fastened to the positioning plate 505. The second end (upper end) of the positioning plate 505 passes through two limit bearings 510, then moves away from and releases the limit block 509 located at the rear end between the two limit bearings 510, and returns to the initial position. The printing machine then drives the table assembly 2 to move along the main track 3, and the cycle continues. In addition, each plate assembly 2 in this application is equipped with an independent positioning component 5, which solves the problem that a failure of a certain positioning component 5 will cause the entire printing machine to stop, thus avoiding production disruption. When printing fewer colors, separate positioning can be selected to reduce energy consumption and noise.

[0054] In some embodiments, the track wheel set 402 consists of two sets arranged side by side, which makes the structure more stable. Each set includes two track wheels 4020 arranged side by side on both sides of the main track 3. One is a concentric track wheel and the other is an eccentric track wheel. Each track wheel 4020 is provided with an annular groove 4021 along the circumference to adapt to the main track 3 and move smoothly. The concentric track wheel is located on the outside because when the elliptical printing machine is printing, the squeegee runs from the outside to the inside, and there is friction and thrust from the outside to the inside. The concentric track wheel on the outside can ensure that the position of each printing plate 200 is consistent. The eccentric track wheel is on the inside and is used to adjust the fit with the main track 3.

[0055] In some embodiments, two limiting bearings 510 are each mounted side-by-side at the bottom of a limiting bearing seat 512 via a limiting shaft 511. The limiting bearing seat 512 can be a U-shaped seat for clearance. The limiting bearing seat 512 is installed inside the sliding seat 400. Of the two limiting bearings 510, one is a concentric shaft bearing and the other is an eccentric shaft bearing. The two limiting bearings 510 can rotate, which can reduce the impact force with the positioning plate 505 and solve the service life problem. The concentric shaft bearing can ensure the positioning accuracy of the positioning plate 505 each time and has high repeatability of positioning accuracy for the printing plate 200. By adjusting the eccentric shaft bearing, the wear gap problem between the positioning plate 505 and the bearing can be solved, and the compatibility between the two can be improved.

[0056] In some embodiments, two slider adjustment holes 403 are provided side by side on the side wall of the sliding seat 400. These holes can be elongated or oblong. The slider fastener 404 passes through the slider adjustment hole 403 and is fastened to one side of the positioning slider 501. The bottom of the positioning slider 501 is fastened to the positioning bracket 500 by the slider limiting member 405. The slider fastener 404 and the slider limiting member 405 can be bolts or screws, etc. By adjusting the slider fastener 404 and the slider limiting member 405, the height and horizontal position of the slider fastener 404 can be changed, which can solve the problem of the wear gap of the track wheel assembly 402 affecting the printing accuracy.

[0057] In some embodiments, the positioning plate 505 includes a connecting seat 5051 disposed at a first end and having an opening 5050. A positioning connecting rod 506 is centrally inserted into the connecting seat 5051 through the opening 5050 to improve the stability of the connection. The positioning connecting rod 506 is connected to the connecting seat 5051 via a pin 5052. A positioning shaft 504 passes through the shaft hole 5053 of the positioning plate 505. The plate also includes a locking plate 5054 with one end connected to the positioning plate 505. A slot 5055 is formed between the locking plate 5054 and the positioning plate 505. The first end of the slot 5055 is connected to the shaft hole 5053, and the second end of the slot 5055 has a notch 5056. The slot 5055 gives the locking plate 5054 a certain elasticity. The locking plate 5054 can move closer to the positioning plate 505 under the action of external force, and can also reset when the external force disappears. The second end of the locking plate 5054 is fastened to the positioning plate 505 through the screw 5057, and the positioning shaft 504 is fastened in the shaft hole 5053. The screw 5057 can be a screw, threaded rod, etc., used for locking and adjusting the tightness, and facilitating the disassembly and fixing of the positioning shaft 504.

[0058] In some embodiments, the positioning bearing 503 is a tapered bearing, and radial nuts 513 are threaded to both ends of the positioning shaft 504 to fasten the tapered bearing in the positioning bearing housing 502. The tapered bearing's tapered rollers and the tapered angle design of the inner and outer rings enable it to distribute radial and axial forces proportionally, achieving bidirectional composite load bearing. It has the advantages of composite load bearing, adjustable rigidity, and impact resistance. Adjusting the radial nuts 513 can solve the bearing wear clearance problem, and there is no need to replace related components after many years of use.

[0059] In some embodiments, two pneumatic throttle valves 5070 are installed side by side on the positioning cylinder 507 to adjust the speed of the positioning cylinder 507's movement, which is convenient to use and highly applicable.

[0060] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A printing machine table positioning device, comprising a printing machine frame and a table assembly, wherein a main track is installed on the printing machine frame, and the table assembly includes a printing table and a printing arm installed at the bottom of the printing table, characterized in that: It also includes sliding components and positioning components; The sliding assembly includes a sliding seat connected to the printing arm at the upper end, a transmission rack installed on one side of the sliding seat, and a set of track wheels installed inside the sliding seat. The table assembly is slidably connected to the main track located on the printing machine frame through the set of track wheels. The positioning assembly includes a positioning bracket installed on one side of the printing machine frame. The positioning bracket is connected to the inner wall of the sliding seat via a positioning slider. Positioning bearing seats are installed at both ends of the positioning bracket, and positioning bearings are installed inside the positioning bearing seats. The assembly also includes a positioning shaft, the two ends of which pass through the positioning bracket and are connected to the two positioning bearings. A positioning plate is installed on the positioning shaft. A positioning connecting rod is installed at the first end of the positioning plate. The positioning connecting rod is connected to the piston rod of the positioning cylinder installed on the printing machine frame. A sensor is installed on the positioning cylinder. The second end of the positioning plate extends into the sliding seat. A limit block is also installed in the sliding seat, and two limit bearings are installed side by side on both sides of the limit block. The piston rod of the positioning cylinder pushes the first end of the positioning plate to rotate synchronously with the positioning shaft fastened to the positioning plate. The second end of the positioning plate abuts against the limit block located between the two limit bearings, restricting the movement of the platform assembly.

2. The printing machine table positioning device as described in claim 1, characterized in that: The track wheel set consists of two sets arranged side by side. Each set includes two track wheels arranged side by side on both sides of the main track. One is a concentric track wheel and the other is an eccentric track wheel. Each track wheel has an annular groove along its circumference.

3. The printing machine table positioning device as described in claim 2, characterized in that: Two limit bearings are installed side by side at the bottom of the limit bearing housing via a limit shaft, and the limit bearing housing is installed inside the sliding seat; of the two limit bearings, one is a concentric shaft bearing and the other is an eccentric shaft bearing.

4. The printing machine table positioning device as described in any one of claims 1 to 3, characterized in that: The side wall of the sliding seat has two slider adjustment holes arranged side by side. The slider fastener passes through the slider adjustment hole and is fastened to one side of the positioning slider. The bottom of the positioning slider is fastened to the positioning bracket by the slider limiter.

5. The printing machine table positioning device as described in claim 4, characterized in that: The positioning plate includes a connecting seat with an opening at its first end, a positioning rod inserted into the connecting seat through the opening, and the positioning rod connected to the connecting seat by a pin; the positioning shaft passes through the shaft hole of the positioning plate, and also includes a locking plate with one end connected to the positioning plate, a slot being formed between the locking plate and the positioning plate, the first end of the slot communicating with the shaft hole, the second end of the slot having a notch, the second end of the locking plate being fastened to the positioning plate by a screw fastener, and thus fastening the positioning shaft in the shaft hole.

6. The printing machine table positioning device as described in claim 5, characterized in that: The locating bearing is a tapered bearing, and radial nuts are threaded to both ends of the locating shaft to secure the tapered bearing in the locating bearing housing.

7. The printing machine table positioning device as described in claim 6, characterized in that: The positioning cylinder is equipped with two pneumatic throttle valves, which are used to adjust the speed of the positioning cylinder's movement.

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