Mandrel height detection mechanism and printing equipment

Abstract

The utility model relates to the technical field of printing, and discloses a mandrel height detection mechanism and printing equipment. The mandrel height detection mechanism and the printing equipment comprise a distance measuring device, a support and a transmission assembly, the transmission assembly is configured to bear and transmit a mandrel, the distance measuring device is arranged on the support, the distance measuring device is arranged above the transmission assembly, and the distance measuring device is configured to detect the distance between the distance measuring device and the upper end of the mandrel in the vertical direction; the relative position of the distance measuring device relative to the vertical direction and / or the horizontal direction of the support is adjustable. By means of the arrangement, the distance measuring device arranged on the support can conduct adaptive adjustment according to the specification of the mandrel, and when the specification of the mandrel changes, the mandrel height detection mechanism can also conduct adaptive adjustment so as to achieve accurate detection of the height of the mandrel. The mandrel height detection mechanism and the printing equipment are high in adaptability and universality.

Description

Technical Field

[0001] The utility model relates to the technical field of printing, in particular to a core shaft height detection mechanism and printing equipment. Background Art

[0002] With the rapid development of bottle cap technology, the thickness of bottle cap tops continues to decrease, placing higher demands on the clarity of printed patterns. Bottle cap printing machines are equipped with a mandrel on which the bottle cap is placed, and the movement of the mandrel moves the bottle cap. If the mandrel height is inconsistent, during the printing process, when the bottle cap is placed on the mandrel, the lower mandrel height will increase the distance between the corresponding position of the bottle cap and the printing plate, resulting in insufficient printing pressure. This prevents the ink from being evenly and clearly transferred to the bottle cap, resulting in blurred patterns and color loss. This seriously affects the clarity and integrity of the printed pattern and reduces the product's appearance quality.

[0003] At present, there are some core shaft height detection devices, which set a frame on the transmission component and a camera on the frame. However, when the specifications of the core shaft change, the position of the detector cannot be changed, and the core shaft with the changed specifications cannot be detected.

[0004] Therefore, there is an urgent need for a core shaft height detection mechanism to solve the problem of low adaptability of the core shaft height detection mechanism. Utility Model Content

[0005] One purpose of the present utility model is to provide a core shaft height detection mechanism that can adapt to the detection of core shaft heights of multiple specifications, and the core shaft height detection mechanism has high adaptability and high versatility.

[0006] As conceived above, the technical solution adopted by the utility model is:

[0007] A core shaft height detection mechanism, comprising:

[0008] a transmission assembly configured to carry and transmit the mandrel;

[0009] Bracket;

[0010] A distance measuring device is provided on the bracket and located above the transmission component. The distance measuring device is configured to detect the distance L between it and the upper end of the core shaft along the vertical direction. The relative position of the distance measuring device relative to the bracket along the vertical direction and / or horizontal direction is adjustable.

[0011] As an optional solution of the core shaft height detection mechanism, the bracket includes:

[0012] a bracket body; and

[0013] The mounting frame is adjustable relative to the bracket body along the horizontal direction, and the distance measuring device is arranged on the mounting frame, and the distance measuring device is adjustable relative to the mounting frame along the up-down direction.

[0014] As an optional solution of the core shaft height detection mechanism, the bracket body includes a first vertical beam and a second vertical beam, and the relative positions of the first vertical beam and the second vertical beam along the up-down direction are adjustable.

[0015] As an optional solution of the core shaft height detection mechanism, the bracket further includes a first fixing member, the bracket body is provided with a first elongated hole, the first elongated hole extends along the horizontal direction, the first fixing member passes through the first elongated hole and the mounting bracket in sequence, and the first fixing member fixes the bracket body and the mounting bracket;

[0016] And / or, the spindle height detection mechanism further includes a second fixing member, the mounting frame is provided with a second elongated hole, the second elongated hole extends along the up-down direction, the second fixing member passes through the second elongated hole and the distance measuring device, and the second fixing member fixes the mounting frame and the distance measuring device;

[0017] And / or, the bracket body also includes a third fixing member, the first vertical beam is provided with a third elongated hole and the second vertical beam is provided with a fourth elongated hole, the third elongated hole and the fourth elongated hole both extend along the up and down directions, the third fixing member passes through the third elongated hole and the fourth elongated hole in sequence, and the third fixing member fixes the first vertical beam and the second vertical beam.

[0018] As an optional solution of the core shaft height detection mechanism, the first fixing member includes:

[0019] The first bolt and the second bolt include a first bolt head and a first screw rod, wherein the first screw rod passes through the first elongated hole and the mounting bracket in sequence;

[0020] A first nut is threadedly connected to the first bolt, and the second bolt head and the first nut jointly clamp the bracket body and the mounting frame.

[0021] As an optional solution of the core shaft height detection mechanism, the second fixing member includes:

[0022] a second bolt, the second bolt comprising a second bolt head and a second screw rod, the second screw rod sequentially passing through the second elongated hole and the distance measuring device;

[0023] A second nut is threadedly connected to the second bolt, and the second bolt head and the second nut jointly clamp the mounting bracket and the distance measuring device.

[0024] As an optional solution of the core shaft height detection mechanism, the second fixing member further includes:

[0025] A buffer member is sleeved on the outer periphery of the second screw rod, and the buffer member is arranged between the mounting bracket and the distance measuring device.

[0026] As an optional solution of the core shaft height detection mechanism, the second fixing member further includes:

[0027] A washer is disposed between the second bolt head and the mounting bracket.

[0028] As an optional solution of the core shaft height detection mechanism, the bracket body also includes:

[0029] The top plate, the mounting frame is located at the upper end of the top plate, a detection port is opened on the top plate, the detection port corresponds to the distance measuring device, the distance measuring device is located above the top plate and can detect the core shaft through the detection port.

[0030] Another object of the present invention is to provide a printing device that can adapt to the detection of core shaft heights of multiple specifications, and the core shaft height detection mechanism has high adaptability and high versatility.

[0031] As conceived above, the technical solution adopted by the utility model is:

[0032] A printing device comprises a printing mechanism and a core shaft height detection mechanism. The printing mechanism is used for printing a workpiece to be printed which is arranged on the core shaft.

[0033] The beneficial effects of the utility model are:

[0034] The present invention provides a mandrel height detection mechanism, wherein a transmission assembly is configured to carry and transmit the mandrel, a distance measuring device is disposed on a bracket, the distance measuring device is disposed above the transmission assembly, and the distance measuring device is configured to detect the distance between the distance measuring device and the upper end of the mandrel in the vertical direction. The relative position of the distance measuring device relative to the bracket in the vertical direction and / or the horizontal direction is adjustable. The above arrangement enables the distance measuring device disposed on the extension bracket to be adaptively adjusted according to the specifications of the mandrel. When the specifications of the mandrel change, the mandrel height detection mechanism can also be adaptively adjusted to achieve detection of the mandrel.

[0035] The utility model proposes a printing device, which includes a printing mechanism and a core shaft height detection mechanism. The printing mechanism can print a workpiece to be printed that is set on the core shaft, so that the printing device can adapt to the detection of core shaft heights of multiple specifications. The core shaft height detection mechanism thereon has high adaptability and versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a first structural diagram of the core shaft height detection mechanism provided by an embodiment of the present utility model;

[0037] Figure 2 This is a second structural diagram of the core shaft height detection mechanism provided by an embodiment of the present utility model;

[0038] Figure 3 This is a first partial enlarged view of the core shaft height detection mechanism provided by an embodiment of the present utility model;

[0039] Figure 4 This is a second partial enlarged view of the core shaft height detection mechanism provided by an embodiment of the present utility model.

[0040] In the picture:

[0041] 10. Mandrel height detection mechanism; 20. Mandrel;

[0042] 1. Transmission components;

[0043] 2. Bracket; 21. Bracket body; 22. Mounting bracket; 23. First fixing member; 211. Top plate; 212. First vertical beam; 213. Second vertical beam; 214. Third fixing member; 221. Second elongated hole; 231. First bolt; 232. First nut; 2111. First elongated hole; 2121. Third elongated hole; 2131. Fourth elongated hole; 2132. Support portion; 2141. Third bolt; 2142. Third nut;

[0044] 3. Distance measuring device;

[0045] 4. Second fixing member; 41. Second bolt; 42. Second nut; 43. Buffer; 44. Gasket. DETAILED DESCRIPTION

[0046] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the drawings only show portions relevant to the present invention, not all of them.

[0047] In the description of this utility model, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this invention based on the specific circumstances.

[0048] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0049] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0050] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0051] This embodiment provides a printing device that can be used in industries such as food and beverages, daily necessities, and gift stationery to print items in these industries. In this embodiment, the items to be printed are bottle caps. In other embodiments, the items to be printed can also be other structures such as food packaging bags and bottle bodies.

[0052] The printing device includes a printing mechanism and a conveyor assembly 1. The bottle cap is mounted on the conveyor assembly 1 and can be moved to a designated position. The printing mechanism can accurately transfer a pre-designed pattern onto the bottle cap surface. The conveyor assembly 1 drives the bottle cap to the working area of ​​the printing mechanism. Once the bottle cap enters the working area of ​​the printing mechanism, the printing mechanism can begin printing on the bottle cap. The conveyor assembly 1 is provided with a mandrel 20, on which the bottle cap is mounted. The movement of the mandrel 20 on the conveyor assembly 1 causes the bottle cap to move.

[0053] However, with the rapid development of bottle cap manufacturing technology, the thickness of the bottle cap top has been continuously reduced, which has put forward higher requirements for the clarity of the printed pattern. During the printing process, the relatively low height of the mandrel 20 will increase the distance between the corresponding position of the bottle cap and the printing mechanism, resulting in insufficient printing pressure, and the ink cannot be evenly and clearly transferred to the bottle cap, resulting in problems such as blurred patterns and color loss, which seriously affect the clarity and integrity of the printed pattern and reduce the appearance quality of the product. The relatively low height of the mandrel 20 will increase the distance between the corresponding position of the bottle cap and the printing mechanism, resulting in excessive printing pressure, which will cause excessive ink to be transferred to the bottle cap, resulting in an excessively thick ink layer printed on the bottle cap, and further resulting in blurred patterns and other problems, seriously affecting the clarity of the printed pattern and reducing the appearance quality of the product.

[0054] In order to solve the above technical problems, Figure 1 As shown, this embodiment further discloses a mandrel height detection mechanism 10, which is used to detect the height of a mandrel 20. The mandrel height detection mechanism 10 includes a transmission component 1, a bracket 2, and a distance measuring device 3. The transmission component 1 is configured to carry and transmit the mandrel 20. The distance measuring device 3 is disposed on the bracket 2. The distance measuring device 3 is disposed above the transmission component 1. The distance measuring device is configured to detect the distance between it and the upper end of the mandrel 20 along the vertical direction of the bracket 2. The corresponding area of ​​the distance measuring device 3 is a detection zone. At least two mandrels 20 can be arranged in at least one row to form a mandrel module. When the transmission component 1 drives the mandrel module to the detection zone, the distance measuring device 3 can detect the mandrel 20 in the detection zone.

[0055] It should be noted that the embodiment of the present disclosure can also detect the height of a single core shaft 20, and the embodiment of the present disclosure does not impose a rigid limit on the number of core shafts 20 to be detected.

[0056] When the core shaft height detection mechanism 10 is used to detect the consistency of the core shaft module height, a core shaft 20 belonging to the core shaft module can be placed in the detection area, the distance measuring device 3 measures the height of the core shaft 20 as the reference height, and the transmission component 1 drives the core shaft module to transmit so that each core shaft 20 is moved to the detection area one after another, and the distance measuring device 3 detects the height of each subsequent core shaft 20. If the height value of the subsequent core shaft 20 is the same as the reference height, no mark is made. If the height value of the subsequent core shaft 20 is different from the reference height, the core shaft 20 is marked and adjusted in the subsequent process. The adjusted core shaft 20 is then detected, marked and adjusted by the core shaft height detection mechanism 10 until the height of the core shafts 20 in the core shaft module is consistent, so that the bottle caps on each core shaft 20 have high printing quality when printing.

[0057] However, when the specifications of the core shaft 20 are changed, the core shaft height detection mechanism 10 disclosed in the above embodiment cannot detect the core shaft 20 with the changed specifications, and the versatility and adaptability of the core shaft height detection mechanism 10 are poor.

[0058] To ensure that the core shaft height detection mechanism 10 can adaptably detect core shafts 20 of various specifications, such as Figures 1-4 As shown, in this embodiment, the distance measuring device 3 can be moved along the vertical direction and horizontal direction of the bracket 2 (i.e. Figure 1 The above arrangement enables the distance measuring device 3 provided on the bracket 2 to be adaptively adjusted according to the specifications of the core shaft 20. When the specifications of the core shaft 20 change, the core shaft height detection mechanism 10 can also be adaptively adjusted to achieve detection of the core shaft 20.

[0059] Of course, in other optional embodiments, only the distance measuring device 3 can be adjusted along the up and down direction of the bracket 2, or only the distance measuring device 3 can be adjusted along the left and right direction of the bracket 2.

[0060] Specifically, if Figure 1 As shown, in this embodiment, the bracket 2 includes a bracket body 21 and a mounting frame 22. The relative position of the mounting frame 22 relative to the bracket body 21 along the horizontal direction of the bracket 2 is adjustable. The distance measuring device 3 is arranged on the mounting frame 22. The relative position of the distance measuring device 3 relative to the mounting frame 22 along the up and down directions of the bracket 2 is adjustable, so that the relative position of the distance measuring device 3 along the up and down directions of the core shaft 20 to be detected is adjustable. When the height of the core shaft 20 to be detected is relatively high, the core shaft height detection mechanism 10 can adapt to the core shaft 20 to be detected by adjusting the relative position of the distance measuring device 3 along the up and down directions of the bracket 2 to perform height detection on the core shaft 20.

[0061] Specifically, if Figure 1-Figure 2 As shown, in this embodiment, the bracket body 21 includes a first vertical beam 212 and a second vertical beam 213. The relative positions of the first vertical beam 212 and the second vertical beam 213 along the up and down directions of the bracket 2 are adjustable, so that the bracket 2 can perform secondary adjustments to the relative position of the distance measuring device 3 along the up and down directions of the core shaft 20 to be detected, so as to adapt to more specifications of the core shaft 20 to be detected and perform height detection on the core shaft 20.

[0062] Preferably, if Figure 1 As shown, in this embodiment, the bottom end of the second vertical beam 213 is folded outward along the horizontal direction of the bracket 2 to form a support portion 2132, which is connected to the designated position. The provision of the support portion 2132 increases the contact area between the bracket 2 and the designated position. The support portion 2132 forms a large support base in the horizontal direction, thereby making the entire bracket 2 more stable and less likely to shake or fall due to external forces or its own vibration.

[0063] Specifically, if Figure 1-Figure 3 As shown, in this embodiment, the bracket 2 also includes a first fixing member 23, and a first elongated hole 2111 is provided on the bracket body 21. The first elongated hole 2111 extends in the horizontal direction. The first fixing member 23 passes through the first elongated hole 2111 and the mounting frame 22 in sequence. The first fixing member 23 fixes the bracket body 21 and the mounting frame 22, so that the mounting frame 22 can move on the bracket body 21 along the horizontal direction of the bracket 2, so that the relative position of the distance measuring device 3 along the horizontal direction of the bracket 2 can be adjusted to adapt to the detection of core shafts 20 to be detected of multiple specifications.

[0064] In other embodiments, the bracket body 21 may be provided with a plurality of first mounting holes arranged in a straight line along the horizontal direction of the bracket 2. By replacing the first elongated hole 2111 with the plurality of first mounting holes, the first fixing member 23 may selectively cooperate with the mounting bracket 22 and any of the first mounting holes to connect the bracket body 21 and the mounting bracket 22 together, thereby achieving a change in the relative position of the mounting bracket 22 along the horizontal direction of the bracket 2, thereby enabling the relative position of the distance measuring device 3 along the horizontal direction of the bracket 2 to be adjusted to accommodate the detection of mandrels 20 of various specifications to be detected. As long as the position of the mounting bracket 22 along the horizontal direction of the bracket 2 can be flexibly adjusted, it will be sufficient.

[0065] Alternatively, the second fixing member 4 may be a pin, a screw, or a bolt-nut structure. In this embodiment, the first fixing member 23 is a bolt-nut structure, comprising a first bolt 231 and a first nut 232. The first bolt 231 comprises a first bolt head and a first screw rod. The first screw rod sequentially passes through the first elongated hole 2111 and the mounting bracket 22 to adjust the mounting bracket 22 horizontally along the bracket 2. The first nut 232 is threadedly connected to the first bolt 231. The first bolt head and the first nut 232 jointly clamp the bracket body 21 and the mounting bracket 22 to achieve connection of the mounting bracket 22 to the bracket body 21.

[0066] Specifically, if Figures 1-4 As shown, in this embodiment, a second elongated hole 221 is provided on the mounting frame 22, and the second elongated hole 221 extends in the vertical direction. The second elongated hole 221 and the distance measuring device 3 are connected through a second fixing member 4, so that the relative position of the distance measuring device 3 on the mounting frame 22 along the upper and lower directions of the bracket 2 can be adjusted to adapt to the detection of core shafts 20 to be detected of multiple specifications.

[0067] In other embodiments, the mounting frame 22 may be provided with a plurality of second mounting holes arranged in a straight line along the vertical direction of the bracket 2. By using the plurality of second mounting holes instead of the second elongated hole 221, the second fixing member 4 can selectively engage with the distance measuring device 3 and any of the second mounting holes to connect the distance measuring device 3 and the mounting frame 22 together, thereby achieving adjustable relative position of the distance measuring device 3 along the vertical direction of the bracket 2 to accommodate the detection of mandrels 20 of various specifications to be detected. As long as the horizontal position of the mounting frame 22 can be flexibly changed, it will be sufficient.

[0068] Alternatively, the second fixing member 4 may be a pin, a screw, or a bolt-nut structure. In this embodiment, the second fixing member 4 is a bolt-nut structure and includes a second bolt 41 and a second nut 42. The second bolt 41 includes a second bolt head and a second screw rod. The screw rod passes through the second elongated hole 221 and the distance measuring device 3 to adjust the distance measuring device 3 along the horizontal direction of the bracket 2. The second nut 42 is threadedly connected to the second bolt 41. The second bolt head and the second nut 42 jointly clamp the mounting bracket 22 and the distance measuring device 3 to achieve the connection of the mounting bracket 22 to the bracket body 21.

[0069] Specifically, if Figure 1 As shown, in this embodiment, a third elongated hole 2121 is provided on the first vertical beam 212, and the third elongated hole 2121 extends in the up-down direction; a fourth elongated hole 2131 is provided on the second vertical beam 213, and the fourth elongated hole 2131 extends in the up-down direction; the third elongated hole 2121 and the fourth elongated hole 2131 are connected by a third fixing member 214, so that the height of the core shaft height detection mechanism 10 can be adjusted in the up-down direction to adapt to the detection of core shafts 20 of multiple specifications to be detected.

[0070] In other embodiments, any one of the first vertical beam 212 and the second vertical beam 213 can be provided with a plurality of third mounting holes arranged in a straight line along the up and down direction. By replacing the third long hole 2121 or the fourth long hole 2131 with a plurality of third mounting holes, the third fixing member 214 can be selectively matched with any third mounting hole to connect the first vertical beam 212 and the second vertical beam 213 together, thereby realizing that the height of the core shaft height detection mechanism 10 can be adjusted along the up and down direction to adapt to the detection of core shafts 20 to be detected of multiple specifications.

[0071] Optionally, the third fixing member 214 can be a pin, a screw, or a bolt and nut structure. In this embodiment, the third fixing member 214 is a bolt and nut structure, and the third fixing member 214 includes a third bolt 2141 and a third nut 2142. The third bolt 2141 includes a third bolt head and a third screw rod. The third screw rod passes through the third elongated hole 2121 and the fourth elongated hole 2131 in sequence to adjust the height of the core shaft height detection mechanism 10. The third nut 2142 is threadedly connected to the third bolt 2141. The third bolt head and the third nut 2142 jointly clamp the first vertical beam 212 and the second vertical beam 213 to achieve the connection between the first vertical beam 212 and the second vertical beam 213.

[0072] Preferably, if Figures 1-4 As shown, in this embodiment, the second fastening assembly also includes a buffer 43, which is sleeved on the outer periphery of the screw. The buffer 43 is arranged between the mounting bracket 22 and the distance measuring device 3, and can effectively absorb and buffer external vibrations and impacts. During the operation of the equipment, whether it is slight vibrations generated by the operation of the machine itself, or unexpected vibration interference caused by the operation of other equipment, the movement of people, etc., the buffer 43 can reduce these vibrations and prevent these vibrations from being directly transmitted to the distance measuring device 3. This is crucial for the distance measuring device 3. The buffer 43 can prevent the displacement and damage of the internal precision optical components or electronic components caused by vibration, thereby extending the service life of the distance measuring device 3, ensuring that the distance measuring device 3 always maintains high-precision measurement performance, reducing the measurement error fluctuation caused by vibration, and ensuring the stability and reliability of the measurement data.

[0073] Preferably, if Figures 1-4 As shown, in this embodiment, the second fixing member 4 also includes a gasket 44, which is arranged between the second bolt head and the mounting bracket 22. The gasket 44 can play a certain anti-loosening role. During the operation of the equipment, the bolts may become loose due to factors such as vibration and temperature changes. The gasket 44 can increase the friction between the bolts and the mounting bracket 22, and absorb vibration energy to a certain extent, reduce the possibility of bolt loosening, and ensure the tightness of the connection. At the same time, for some minor impacts and vibrations, the gasket 44 can also play a buffering effect, protecting the mounting bracket 22 and the components connected to the mounting bracket 22 from the impact force, further improving the stability and reliability of the equipment operation.

[0074] Specifically, if Figures 1-4As shown, in this embodiment, the bracket body 21 also includes a top plate 211, with a mounting bracket 22 connected above the top plate 211. The top plate 211 is provided with a detection port, which is arranged corresponding to the distance measuring device 3. The distance measuring device 3 is located above the top plate 211 and can detect the core shaft 20 through the detection port. The presence of the detection port ensures that the detection light or signal of the distance measuring device 3 can be accurately and centrally projected onto the core shaft 20. Without the detection port, the light or signal may be scattered, reflected, or blocked at the top plate 211, and cannot effectively reach the surface of the core shaft 20 for measurement. The detection port also provides a clear and accurate spatial channel planning for the detection light path or detection area of ​​the distance measuring device 3. Because the distance measuring device 3 is located above the top plate 211 and is also provided with a detection port on the top plate 211, the core shaft height detection mechanism 10 can effectively ensure that when the distance measuring device 3 performs a detection operation, any of its own components will not accidentally enter the operating space of the core shaft 20, thereby completely eliminating the possibility of physical collision and interference between the two from the spatial layout. This precise positioning and spatial planning enables the distance measuring device 3 to operate stably within a safe spatial range, achieving accurate detection of the core shaft 20 without worrying about the risk of interference due to space limitations.

[0075] Preferably, in this embodiment, the distance measuring device 3 is a laser rangefinder, which can accurately measure tiny distance changes with an accuracy of millimeters or even microns. In a bottle cap printing machine, since even slight differences in the height of the core shaft 20 may affect the quality and effect of the bottle cap printing, the laser rangefinder can accurately capture these tiny height inconsistencies, providing extremely accurate data support for subsequent adjustments, ensuring that the height of each core shaft 20 can meet the strict printing process requirements, thereby effectively improving the clarity, integrity and aesthetics of the bottle cap printing, and reducing the printing waste rate caused by height deviation. In other embodiments, the distance measuring device 3 can also be an ultrasonic rangefinder or a photoelectric rangefinder, etc., as long as it can accurately measure the height of the core shaft 20, and no further details will be given.

[0076] Optionally, in this embodiment, the transmission component 1 includes a chain plate and a sprocket. The chain plate is generally a chain structure composed of a plurality of chain links, and each chain link has a portion that engages with the sprocket teeth. When the power source drives the active sprocket to rotate, the teeth of the sprocket will push the chain links of the chain plate one by one, causing the chain plate to move along the circumferential direction of the sprocket. Since the chain plate is connected in an annular manner, the rotation of the active sprocket will drive the entire chain to move. As the chain moves, the chain links of the chain will engage with the teeth of the driven sprocket, pushing the driven sprocket to rotate, thereby realizing the circular motion of the chain plate. The core shaft 20 is arranged on the chain plate and connected by a fourth fastener, so that the core shaft 20 can also be driven by the transmission component 1 and moved to the detection position for height detection to achieve the inspection of the height consistency of the core shaft module.

[0077] Optionally, the material of the chain plate can be metal, plastic, etc. In this embodiment, the chain plate is made of metal material, and the metal material itself has high strength. For example, the chain plate made of alloy steel has a yield strength and tensile strength that can withstand the weight of a heavier core shaft 20 to adapt to the transmission of core shafts 20 of more specifications.

[0078] In some other embodiments, the transmission component 1 may also include a belt and a rotating shaft. The belt is usually annular and is mounted on the driving rotating shaft and the driven rotating shaft. When the driving rotating shaft rotates, the friction between the belt and the rotating shaft surface drives the belt to move, and the belt drives the driven rotating shaft to rotate in the same way, thereby realizing power transmission. The core shaft module is placed on the belt, and the belt can drive the core shaft module to move, and the core shaft 20 in the core shaft module is transferred to the detection area. The core shaft 20 in the detection area is height-detected to achieve the height consistency test of the core shaft module.

[0079] In other embodiments, the transport component 1 may be in any form, as long as it can be mounted on a printing device and can transport the core shaft 20 to the inspection area so that the core shaft 20 can be inspected for height.

[0080] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A core shaft height detection mechanism, characterized in that: include: A transmission assembly (1) configured to carry and transmit a mandrel (20); Bracket (2); A distance measuring device (3) is provided on the support (2) and located above the transmission assembly (1); the distance measuring device (3) is configured to detect a distance L between the distance measuring device (3) and the upper end of the core shaft (20) along the vertical direction; and the relative position of the distance measuring device (3) relative to the support (2) along the vertical direction and / or the horizontal direction is adjustable.

2. The core shaft height detection mechanism according to claim 1, characterized in that: The support (2) comprises: a support body (21); and A mounting frame (22) is provided, wherein the relative position of the mounting frame (22) relative to the bracket body (21) along the horizontal direction is adjustable; the distance measuring device (3) is provided on the mounting frame (22), and the relative position of the distance measuring device (3) relative to the mounting frame (22) along the vertical direction is adjustable.

3. The core shaft height detection mechanism according to claim 2, characterized in that: The bracket body (21) comprises a first vertical beam (212) and a second vertical beam (213), and the relative positions of the first vertical beam (212) and the second vertical beam (213) along the up-down direction are adjustable.

4. The core shaft height detection mechanism according to claim 3, characterized in that: The bracket (2) further comprises a first fixing member (23); a first elongated hole (2111) is provided on the bracket body (21); the first elongated hole (2111) extends along the horizontal direction; the first fixing member (23) passes through the first elongated hole (2111) and the mounting frame (22) in sequence; the first fixing member (23) fixes the bracket body (21) and the mounting frame (22); And / or, the spindle height detection mechanism further comprises a second fixing member (4), the mounting frame (22) is provided with a second elongated hole (221), the second elongated hole (221) extends in the up-down direction, the second fixing member (4) passes through the second elongated hole (221) and the distance measuring device (3), and the second fixing member (4) fixes the mounting frame (22) and the distance measuring device (3); And / or, the bracket body (21) further includes a third fixing member (214), the first vertical beam (212) is provided with a third elongated hole (2121) and the second vertical beam (213) is provided with a fourth elongated hole (2131), the third elongated hole (2121) and the fourth elongated hole (2131) both extend along the up-down direction, the third fixing member (214) passes through the third elongated hole (2121) and the fourth elongated hole (2131) in sequence, and the third fixing member (214) fixes the first vertical beam (212) and the second vertical beam (213).

5. The core shaft height detection mechanism according to claim 4, characterized in that: The first fixing member (23) comprises: A first bolt (231), the first bolt (231) comprising a first bolt head and a first screw rod, the first screw rod sequentially passing through the first elongated hole (2111) and the mounting frame (22); A first nut (232) is threadedly connected to the first bolt (231), and the first bolt head and the first nut (232) jointly clamp the bracket body (21) and the mounting frame (22).

6. The core shaft height detection mechanism according to claim 4, characterized in that: The second fixing member (4) comprises: a second bolt (41), the second bolt (41) comprising a second bolt head and a second screw rod, the second screw rod sequentially passing through the second elongated hole (221) and the distance measuring device (3); A second nut (42), wherein the second nut (42) is threadedly connected to the second bolt (41), and the second bolt head and the second nut (42) jointly clamp the mounting frame (22) and the distance measuring device (3).

7. The core shaft height detection mechanism according to claim 6, characterized in that: The second fixing member (4) further comprises: A buffer member (43) is sleeved on the outer periphery of the second screw rod, and the buffer member (43) is arranged between the mounting frame (22) and the distance measuring device (3).

8. The core shaft height detection mechanism according to claim 6, characterized in that: The second fixing member (4) further comprises: A washer (44) is disposed between the second bolt head and the mounting bracket (22).

9. The core shaft height detection mechanism according to any one of claims 2 to 4, characterized in that: The support body (21) further includes: A top plate (211), the mounting frame (22) is located at the upper end of the top plate (211), a detection port is provided on the top plate (211), the detection port corresponds to the distance measuring device (3), and the distance measuring device (3) is located above the top plate (211) and can detect the core shaft (20) through the detection port.

10. A printing device, characterized in that: It comprises a printing mechanism and a core shaft height detection mechanism as claimed in any one of claims 1 to 9, wherein the printing mechanism is used for printing a workpiece to be printed which is arranged on the core shaft (20).

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