Stable label pressing mechanism and labeling machine

Abstract

The invention discloses a stable label pressing mechanism and a labeling machine. The stable label pressing mechanism comprises a label pressing mounting seat, a label pressing roller and a rotary driving mechanism, the label pressing mounting seat comprises a fixed mounting seat and a movable mounting seat; the label pressing rollers comprise a driving label pressing roller and a driven label pressing roller, the driving label pressing roller is rotationally connected to the fixed mounting seat, and the driven label pressing roller is rotationally connected to the movable mounting seat; the rotary driving mechanism is arranged on the fixed mounting seat, and the driving end of the rotary driving mechanism is in power connection with the driving label pressing roller; a plurality of stable pressing structures used for promoting the driven label pressing rollers to be tightly attached to the driving label pressing roller are arranged between the fixed installation base and the movable installation base, and the two ends of each stable pressing structure abut against the fixed installation base and the movable installation base respectively. The stable label pressing mechanism can stably press labels in a self-adaptive mode, adapts to labels of different thicknesses and is beneficial to improving the labeling quality.

Description

TECHNICAL FIELD

[0001] The present application relates to a labeling device, in particular to a stable labeling mechanism and a labeling machine. BACKGROUND

[0002] In the existing labeling device technology, the labeling mechanism is a key component to ensure the firm combination of the label and the surface of the labeled object. The design of the labeling mechanism usually relies on a pair of parallel pressure rollers. After installation, the relative position and distance of the pressure rollers are fixed by the mechanical structure, forming a static pressing mode. Since the pressure distance cannot be flexibly adjusted or automatically compensated during operation, the mechanism has poor adaptability to hot melt adhesive labels of different physical specifications. Specifically, when the thickness of the label changes, the fixed gap between the rollers may not provide enough pressure for thinner labels, resulting in poor adhesion. For thicker labels, the gap may be too small, causing excessive extrusion, label deformation, or even damage to the surface of the labeled object.

[0003] In addition, in actual continuous production, due to factors such as label thickness tolerance, substrate elasticity fluctuation, or conveying speed variation, unstable pressure will directly affect the bonding effect and curing uniformity of the hot melt adhesive. Insufficient pressing force can cause the label edges to curl up and the adhesion surface to have air bubbles. Excessive pressure may cause the label to stretch and deform, and the adhesive layer to be unevenly distributed, thereby affecting the appearance quality and durability of the label. Especially in high-speed, multi-specification flexible production scenarios, the existing labeling mechanism lacks dynamic adjustment capability, which has become a significant bottleneck restricting the further improvement of labeling precision and overall product quality.

[0004] Therefore, the labeling mechanism in the prior art has obvious limitations in structural adaptability, pressure control stability, and overall labeling quality. There is an urgent need for a new labeling mechanism that can adapt to different label thicknesses and provide sustained and stable pressure to meet the demand for high-precision and high-reliability labeling processes in modern production. SUMMARY

[0005] The purpose of the present application is to overcome the above-mentioned problems and provide a stable labeling mechanism that can adaptively and stably press the label, suitable for labels of different thicknesses, and improve the labeling quality.

[0006] The purpose of the present application is to overcome the above-mentioned problems and provide a labeling machine.

[0007] The purpose of the present application is achieved by the following technical solutions: A stable labeling mechanism, comprising a labeling mounting seat, a labeling roller, and a rotary drive mechanism. The label mounting base includes a fixed mounting base and a movable mounting base; the label roller includes an active label roller and a driven label roller, the active label roller being rotatably connected to the fixed mounting base, and the driven label roller being rotatably connected to the movable mounting base; the rotary drive mechanism is mounted on the fixed mounting base, and the drive end of the rotary drive mechanism is poweredly connected to the active label roller; a plurality of stabilizing clamping structures are provided between the fixed mounting base and the movable mounting base for causing the driven label roller to press tightly against the active label roller, and the two ends of the stabilizing clamping structures abut against the fixed mounting base and the movable mounting base respectively.

[0008] In a preferred embodiment of the present invention, the fixed mounting base includes a first fixed mounting base and a second fixed mounting base. The first fixed mounting base is fixedly connected to the second fixed mounting base by a bolt connection structure. The driven pressure roller is located between the active pressure roller and the movable mounting base. The movable mounting base is located between the driven pressure roller and the second fixed mounting base. The stabilizing pressing structure is located between the movable mounting base and the second fixed mounting base.

[0009] Furthermore, the stabilizing clamping structure is an adaptive elastic spring, with its two ends respectively abutting against the second fixed mounting base and the movable mounting base. This allows for adaptively providing a stable clamping force. When the label thickness changes, the compression of the spring can be adaptively adjusted, thus maintaining a relatively constant clamping force between the driven and active label rollers. This effectively solves the problem of unstable clamping force caused by label thickness tolerances or material elasticity fluctuations, helping to reduce label edge lifting, air bubbles on the bonding surface, or abnormal adhesive overflow, significantly improving label adhesion and appearance consistency.

[0010] In a preferred embodiment of the present invention, the rotary drive mechanism includes a rotary drive motor, which is connected to the active pressure roller via a coupling.

[0011] In one preferred scheme of the present application, a label threading adjustment mechanism is further included, which comprises a label threading adjustment lever and an intermediate transmission member, the label threading adjustment lever is rotationally connected to the second fixed mounting base and partially located between the movable mounting base and the driven label pressing roller, and the partial body is an eccentric structure; one end of the label threading adjustment lever is provided with a rotating handle; the movable mounting base is provided with an avoiding hole for avoiding the label threading adjustment lever; the intermediate transmission member is located between the eccentric structure and the movable mounting base, and is used for transmitting power to the movable mounting base when the label threading adjustment lever rotates, so as to drive the driven label pressing roller to move away from the driving label pressing roller. Through the above structure, in the normal label pressing process, the intermediate transmission member is in contact with the near focal point of the eccentric structure of the label threading adjustment lever, at this time, the driven label pressing roller is closest to the driving label pressing roller, and the label can be stably pressed; when the label needs to be replaced, the label threading adjustment lever is driven to rotate by rotating the handle, so that the far focal point of the eccentric structure of the label threading adjustment lever gradually turns to the intermediate transmission member, at this time, the eccentric structure of the label threading adjustment lever will extrude the intermediate transmission member in the direction away from the driven label pressing roller, and then the movable mounting base is moved in the direction away from the driven label pressing roller, so that the driven label pressing roller moves away from the driving label pressing roller, until the far focal point of the eccentric structure of the label threading adjustment lever is in contact with the intermediate transmission member, at this time, the distance between the driven label pressing roller and the driving label pressing roller is the largest, and the staff can conveniently thread the label; after the label threading is completed, the label threading adjustment lever is rotated to reset, so that the driven label pressing roller is close to the driving label pressing roller, and the label is pressed again to perform a new round of label pressing work.

[0012] Further, the intermediate transmission member is a friction pad made of a high polymer material, the movable mounting base is provided with a receiving groove for receiving the intermediate transmission member, and one end of the friction pad extends into the receiving groove. Through the above structure, the high polymer friction pad can play a lubricating role, and is wear-resistant (long service life), which is beneficial to smoothly transmit the power of the label threading adjustment lever to the movable mounting base.

[0013] In one preferred scheme of the present application, the driven label pressing roller comprises an outer label pressing roller sleeve, an inner support cylinder and a pressure adjustment mechanism. The inner support cylinder is coaxially located on the inner side of the outer label pressing roller sleeve, and the inner support cylinder is connected with a rotating shaft through a bearing, and the rotating shaft is fixedly connected with the movable mounting base. The pressure adjusting mechanism comprises a plurality of sets of concentric telescopic components, the arrangement direction of the plurality of sets of concentric telescopic components is parallel to the axis of the inner support cylinder, each set of concentric telescopic components comprises a plurality of concentric telescopic pieces arranged uniformly in the circumferential direction around the axis of the inner support cylinder, each concentric telescopic piece comprises a telescopic sliding part and a telescopic support part, the telescopic sliding part is slidably arranged through the inner support cylinder, the telescopic support part is in an arc shape and is located between the inner support cylinder and an outer pressure mark roller sleeve, and the outer pressure mark roller sleeve is made of elastic material.

[0014] Further, the concentric telescopic driving mechanism comprises a concentric telescopic rotating handle and a concentric telescopic transmission assembly, the concentric telescopic transmission assembly comprises a first concentric telescopic transmission assembly and a second concentric telescopic transmission assembly, the first concentric telescopic transmission assembly comprises a concentric telescopic transmission screw rod and a concentric telescopic transmission screw rod nut, the concentric telescopic transmission screw rod is rotationally connected in the inner cavity of the rotating shaft, one end of the concentric telescopic transmission screw rod extends to the outside of the rotating shaft and is fixedly connected with the concentric telescopic rotating handle, and the concentric telescopic rotating handle is connected with the locking structure after being locked in rotation. The second concentric telescopic transmission assembly and the concentric telescopic transmission screw rod nut are each provided with a plurality of sets, each set of the second concentric telescopic transmission assembly comprises a sliding transmission sleeve and a transmission block, the sliding transmission sleeve is slidably arranged outside the rotating shaft, one end of the transmission block is directly or indirectly arranged on the concentric telescopic transmission screw rod nut, and the other end of the transmission block is in contact with the inner wall of the sliding transmission sleeve through the avoiding hole of the rotating shaft in the working state; the outer surface of the sliding transmission sleeve is provided with a plurality of extrusion pulleys arranged in the circumferential direction around the axis of the sliding transmission sleeve, and the end of the telescopic sliding part of the concentric telescopic piece is provided with a telescopic extrusion inclined surface matched with the extrusion pulley.

[0015] Further, the pressure adjusting mechanism further comprises a plurality of sets of independent telescopic connecting assemblies, each set of the independent telescopic connecting assembly comprises a first independent telescopic connecting rod and a second independent telescopic connecting rod, the transmission block is rotationally connected on the concentric telescopic transmission screw rod nut, a torsion spring is arranged between the transmission block and the concentric telescopic transmission screw rod nut to promote the disconnection of the transmission block and the concentric telescopic transmission screw rod nut in the state without external force, one end of the transmission block is rotationally connected with one end of the first independent telescopic connecting rod, the other end of the first independent telescopic connecting rod is movably connected with one end of the second independent telescopic connecting rod through an oblong hole, and the other end of the second independent telescopic connecting rod extends to the front of the concentric telescopic rotating handle through the avoiding hole of the concentric telescopic rotating handle.

[0016] In actual production process, the straightness processing error in the forming of driven pressure marking roller and the deformation after long time use affect the pressure of different parts of driven pressure marking roller and driving pressure marking roller (the gap between different parts of driven pressure marking roller and driving pressure marking roller is not completely the same, there is a slight difference), that is, the pressure of different parts of driven pressure marking roller on the label is not consistent (some labels are in the middle, some are left or right), which is easy to cause the phenomenon of not being pressed in place; in addition, the relative position of different labels is different, in order to provide the pressing effect in place, it is also necessary to adjust the pressure of different parts of driven pressure marking roller according to the relative position of the label. In order to solve the above problems, the scheme provides a driving pressure adjusting mechanism, which can actively adjust the pressure of different parts of driven pressure marking roller and driving pressure marking roller, meet the needs of different occasions, further improve the labeling quality, and the specific operation of active adjustment is as follows: in the initial state, the expansion support parts of all concentric expansion members are attached to the outer surface of the inner layer support cylinder; assuming that the pressure of the middle part of driven pressure marking roller needs to be increased, the second independent expansion connecting rod corresponding to the middle part of driven pressure marking roller is first pushed to make it swing with the first independent expansion and transmission block, until the other end of the transmission block is in contact with the inner wall of the sliding transmission sleeve, and the current state is kept unchanged, which is an independent adjustment of the power transmission path, which can flexibly and independently adjust the pressure of different parts. Then manually operate the concentric expansion rotating handle to rotate in the corresponding direction, drive the concentric expansion transmission screw to rotate, and the concentric expansion transmission screw nut moves axially, then the transmission block moves synchronously with the sliding transmission sleeve through the transmission block, and then the sliding transmission sleeve is extruded on the expansion extrusion inclined surface through the extrusion pulley, and then the corresponding concentric expansion members are expanded radially outward, and the expansion support parts of the concentric expansion members expand the middle part of the elastic outer layer pressure marking roller, at this time the diameter of the middle part of the outer layer pressure marking roller is slightly larger, which is closer to the driving pressure marking roller, so that the pressure of the middle part of the driven pressure marking roller can be increased, and the label can be pressed more tightly to meet the needs of different use occasions. The adjusted concentric expansion rotating handle is locked by the locking structure until the current labeling work is completed; after the second independent expansion connecting rod is released, the torsional spring drives the transmission block, the first independent expansion connecting rod and the second independent expansion connecting rod to automatically reset, so that the transmission block is disconnected with the concentric expansion transmission screw nut, and the standby state is entered.

[0017] Further, under the axial projection, the transmission blocks of the plurality of second concentric expansion transmission assemblies are located at different positions. In this way, different groups of independent expansion connecting assemblies can be arranged at different circumferential positions to avoid interference between different groups of independent expansion connecting assemblies and ensure normal independent adjustment operation.

[0018] A labeling machine comprises the stable labeling mechanism.

[0019] Compared with the prior art, the present application has the following beneficial effects: 1、The stable label pressing mechanism of the present application can automatically adjust the position of the driven label pressing roller according to the thickness of the label, realize self-adaptive adjustment of the pressing distance, and effectively adapt to hot melt adhesive labels of different thicknesses, by setting the label pressing mounting seat composed of the fixed mounting seat and the movable mounting seat, and the stable pressing structure connected therebetween.

[0020] 2、The stable label pressing mechanism of the present application can provide uniform and recoverable pressing force, maintain the stability of the pressing force when the label has thickness fluctuation or material elasticity changes, reduce the label wrinkling, bubble, and adhesive overflow, avoid excessive stretching or poor adhesion of the label, meet the high-quality labeling process requirements, and improve the overall labeling quality. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a front view of one of the embodiments of the stable label pressing mechanism of the present application.

[0022] Figure 2 It is a perspective structural schematic view of one of the embodiments of the stable label pressing mechanism of the present application.

[0023] Figures 3-4 It is a front view of the label pressing mounting seat and the label pressing roller in two different states, in which the first fixed mounting seat is hidden.

[0024] Figure 5 It is a perspective structural schematic view of another embodiment of the stable label pressing mechanism of the present application.

[0025] Figure 6 It is a perspective structural schematic view of the driven label pressing roller of another embodiment of the present application.

[0026] Figure 7 It is an exploded perspective structural schematic view of the driven label pressing roller of another embodiment of the present application.

[0027] Figures 8-9 It is a partial sectional view of the driven label pressing roller of another embodiment of the present application, in which the outer label pressing roller sleeve is hidden.

[0028] Figure 10 It is an enlarged view of X in Figure 8

[0029] Figures 11-12 It is a side view of the pressure adjusting mechanism of the driven label pressing roller of another embodiment of the present application in different states. DETAILED DESCRIPTION

[0030] ​In order for those skilled in the art to have a better understanding of the technical solutions of the present application, the present application will be further described below in conjunction with the embodiments and drawings, but the embodiments of the present application are not limited thereto.

[0031] Embodiment 1

[0032] In combination Figures 1-4 , the labeling machine of the present embodiment comprises a stable labeling pressing mechanism, which comprises a labeling pressing mounting base, a labeling pressing roller and a rotary driving mechanism; the labeling pressing mounting base comprises a fixed mounting base and a movable mounting base 1, the fixed mounting base comprises a first fixed mounting base 2 and a second fixed mounting base 3, the first fixed mounting base 2 is fixedly connected with the second fixed mounting base 3 through a bolt connection structure, the labeling pressing roller comprises a driving labeling pressing roller 4 and a driven labeling pressing roller 5, the driving labeling pressing roller 4 is rotationally connected on the first fixed mounting base 2, and the driven labeling pressing roller 5 is rotationally connected on the movable mounting base 1; the rotary driving mechanism is arranged on the first fixed mounting base 2, and a driving end of the rotary driving mechanism is power-connected with the driving labeling pressing roller 4; a stable pressing structure for enabling the driven labeling pressing roller 5 to be tightly attached to the driving labeling pressing roller 4 is arranged between the second fixed mounting base 3 and the movable mounting base 1.

[0033] In combination Figures 1-4 , the driven labeling pressing roller 5 is located between the driving labeling pressing roller 4 and the movable mounting base 1, the movable mounting base 1 is located between the driven labeling pressing roller 5 and the second fixed mounting base 3, and the stable pressing structure is located between the movable mounting base 1 and the second fixed mounting base 3.

[0034] Further, the stable pressing structure is a self-adaptive elastic compression spring 6, two ends of the self-adaptive elastic compression spring 6 are respectively abutted against the second fixed mounting base 3 and the movable mounting base 1. In this way, a stable pressing force can be self-adaptively provided, when the thickness of the label changes, the compression amount of the compression spring can be self-adaptively adjusted, so that the pressing force between the driven labeling pressing roller 5 and the driving labeling pressing roller 4 remains relatively constant, effectively solving the problem of unstable pressing force caused by label thickness tolerance or material elasticity fluctuation, which helps to reduce the phenomenon of label edge lifting, air bubble or abnormal overflow of adhesive on the attached surface, and significantly improves the firmness and appearance consistency of the labeling.

[0035] In combination Figures 1-2 , the rotary driving mechanism comprises a rotary driving motor 7, which is connected with the driving labeling pressing roller 4 through a shaft coupling.

[0036] In combination Figures 1-4The embodiment also comprises a label threading adjustment mechanism, which comprises a label threading adjustment lever 8 and an intermediate transmission member 9. The label threading adjustment lever 8 is rotationally connected to the second fixed mounting seat 3 and partially located between the movable mounting seat 1 and the driven label pressing roller 5, and the partial body is an eccentric structure. One end of the label threading adjustment lever 8 is provided with a rotating handle 10. The movable mounting seat 1 is provided with an avoiding hole for avoiding the label threading adjustment lever 8. The intermediate transmission member 9 is located between the eccentric structure and the movable mounting seat 1, and is used for transmitting power to the movable mounting seat 1 when the label threading adjustment lever 8 rotates, so as to drive the driven label pressing roller 5 to move away from the driving label pressing roller 4. Through the above structure, in the normal label pressing process, the intermediate transmission member 9 is in contact with the near focal point of the eccentric structure of the label threading adjustment lever 8, at this time, the driven label pressing roller 5 is closest to the driving label pressing roller 4, as shown in FIG. 1. Figure 3 The label can be stably pressed; when the label needs to be replaced, the label threading adjustment lever 8 is driven to rotate by rotating the handle 10, so that the far focal point of the eccentric structure of the label threading adjustment lever 8 gradually turns to the intermediate transmission member 9, at this time, the eccentric structure of the label threading adjustment lever 8 will extrude the intermediate transmission member 9 in the direction away from the driven label pressing roller 5, and then promote the movable mounting seat 1 to move away from the driven label pressing roller 5, so that the driven label pressing roller 5 moves away from the driving label pressing roller 4, until the far focal point of the eccentric structure of the label threading adjustment lever 8 is in contact with the intermediate transmission member 9, at this time, the distance between the driven label pressing roller 5 and the driving label pressing roller 4 is the largest, as shown in FIG. 2. Figure 4 It is convenient for the staff to thread the label; after the label threading is completed, the label threading adjustment lever 8 is rotated to reset, so that the driven label pressing roller 5 approaches the driving label pressing roller 4, and then the label is pressed again to perform a new round of label pressing work.

[0037] Further, the intermediate transmission member 9 is a friction pad made of a high polymer material, and the movable mounting seat 1 is provided with a receiving groove for receiving the intermediate transmission member 9, and one end of the friction pad extends into the receiving groove. Through the above structure, the high polymer friction pad can play a lubricating role, and is wear-resistant (long service life), which is beneficial to smoothly transmit the power of the label threading adjustment lever 8 to the movable mounting seat 1.

[0038] Embodiment 2

[0039] Combined Figures 5-12The driven pressure marking roller 5 of the embodiment comprises an outer layer pressure marking roller sleeve 5-1, an inner layer supporting cylinder 5-2 and a pressure adjusting mechanism; the inner layer supporting cylinder 5-2 is coaxially located at the inner side of the outer layer pressure marking roller sleeve 5-1, the inner layer supporting cylinder 5-2 is connected with the rotating shaft 12 through the bearing 11, and the rotating shaft 12 is fixedly connected with the movable mounting seat 1; the pressure adjusting mechanism comprises a concentric telescopic assembly and a concentric telescopic driving mechanism, the concentric telescopic assembly is provided in multiple groups, the arrangement direction of the multiple groups of concentric telescopic assemblies is parallel to the axis of the inner layer supporting cylinder 5-2, each group of concentric telescopic assemblies comprises multiple concentric telescopic pieces 5-3 which are uniformly arranged in the circumferential direction around the axis of the inner layer supporting cylinder 5-2, each concentric telescopic piece 5-3 comprises a telescopic sliding part 5-31 and a telescopic supporting part 5-32, the telescopic sliding part 5-31 is slidably arranged through the inner layer supporting cylinder 5-2, the telescopic supporting part 5-32 is in an arc shape and is located between the inner layer supporting cylinder 5-2 and the outer layer pressure marking roller sleeve 5-1, and the outer layer pressure marking roller sleeve 5-1 is made of elastic material.

[0040] In combination Figures 5-12 The concentric telescopic driving mechanism comprises a concentric telescopic rotating hand wheel 5-4 and a concentric telescopic transmission assembly, the concentric telescopic transmission assembly comprises a first concentric telescopic transmission assembly and a second concentric telescopic transmission assembly, the first concentric telescopic transmission assembly comprises a concentric telescopic transmission screw rod 5-5 and a concentric telescopic transmission screw nut 5-6, the concentric telescopic transmission screw rod 5-5 is rotationally connected in the inner cavity of the rotating shaft 12, one end of the concentric telescopic transmission screw rod 5-5 extends to the outside of the rotating shaft 12 and is fixedly connected with the concentric telescopic rotating hand wheel 5-4, and the concentric telescopic rotating hand wheel 5-4 is connected with the locked structure after rotation.

[0041] In combination Figures 5-12 The second concentric telescopic transmission assembly and the concentric telescopic transmission screw nut 5-6 are each provided in multiple groups, each group of second concentric telescopic transmission assemblies comprises a sliding transmission sleeve 5-7 and a transmission shifting block 5-8, the sliding transmission sleeve 5-7 is slidably arranged outside the rotating shaft 12, one end of the transmission shifting block 5-8 is directly or indirectly arranged on the concentric telescopic transmission screw nut 5-6, the other end of the transmission shifting block 5-8 is in contact with the inner wall of the sliding transmission sleeve 5-7 through the avoiding hole of the rotating shaft 12 in the working state, the outer surface of the sliding transmission sleeve 5-7 is provided with multiple extrusion pulleys 5-9 which are arranged in the circumferential direction around the axis of the sliding transmission sleeve 5-7, and the end of the telescopic sliding part 5-31 of the concentric telescopic piece 5-3 is provided with a telescopic extrusion inclined surface which cooperates with the extrusion pulley 5-9; specifically, limit structures (not shown in the figure, which can be referred to the prior art) are arranged at the front and back of the sliding transmission sleeve 5-7 to prevent the sliding transmission sleeve 5-7 from slipping off.

[0042] In combination Figures 5-12The pressure adjusting mechanism further comprises a plurality of groups of independent telescopic connecting assemblies, each group of independent telescopic connecting assemblies comprising a first independent telescopic connecting rod 5-10 and a second independent telescopic connecting rod 5-11; the transmission knob 5-8 is rotationally connected to the concentric telescopic transmission screw nut 5-6, and a torsion spring (not shown in the figure) is arranged between the transmission knob 5-8 and the concentric telescopic transmission screw nut 5-6 to facilitate the disconnection of the transmission knob 5-8 and the concentric telescopic transmission screw nut 5-6 under the condition of no external force; the transmission knob 5-8 is rotationally connected to one end of the first independent telescopic connecting rod 5-10, the other end of the first independent telescopic connecting rod 5-10 is movably connected to one end of the second independent telescopic connecting rod 5-11 through a long circular hole, and the other end of the second independent telescopic connecting rod 5-11 extends to the front of the concentric telescopic rotary handle 5-4 through the avoiding hole of the concentric telescopic rotary handle 5-4.

[0043] In actual production process, the straightness processing error of the driven pressure marking roller 5 during forming and the deformation after long time use affect the pressure of different parts of the driven pressure marking roller 5 and the driving pressure marking roller 4, that is, the pressure of different parts of the driven pressure marking roller 5 on the label is inconsistent (the gap between different parts and the driving pressure marking roller is not completely the same, there is a slight difference), which is easy to cause the phenomenon of not being pressed in place; in addition, the relative positions of different labels are different (some labels are in the center, some are left or right), in order to provide the pressing effect in place, it is also necessary to adjust the pressure of different parts of the driven pressure marking roller 5 according to the relative position of the label of different labels. In order to solve the above problems, the present scheme provides a driving pressure adjusting mechanism, which can actively adjust the pressure of different parts of the driven pressure marking roller 5 and the driving pressure marking roller 4, meet the needs of different occasions, further improve the labeling quality, and the specific operation of active adjustment is: in the initial state, the telescopic supporting parts 5-32 of all concentric telescopic parts 5-3 are attached to the outer surface of the inner layer supporting cylinder 5-2, and the driven pressure marking roller 5 is in the state of being pressed by the driving pressure marking roller 4, as shown in Figure 8 and Figure 11;When it is necessary to increase the pressing force of the middle part of the driven pressure marking roller 5, first push the second independent telescopic connecting rod 5-11 corresponding to the middle part of the driven pressure marking roller 5 to swing with the first independent telescopic and transmission block 5-8 until the other end of the transmission block 5-8 is in contact with the inner wall of the sliding transmission sleeve 5-7, and the current state is kept unchanged. This is an independent adjustment of the power transmission path, which can independently adjust the pressing force of different parts flexibly. Then manually rotate the concentric telescopic rotating handle 5-4 in the corresponding direction to drive the concentric telescopic transmission screw 5-5 to rotate, and the concentric telescopic transmission screw nut 5-6 to move axially. Then the transmission block 5-8 drives the sliding transmission sleeve 5-7 to move axially synchronously, and then the extrusion pulley 5-9 is extruded on the telescopic extrusion inclined surface, and then the corresponding concentric telescopic parts 5-3 are stretched radially outward, and the middle part of the elastic outer layer pressure marking roller sleeve 5-1 is expanded by the telescopic support part 5-32 of the concentric telescopic part 5-3. At this time, the diameter of the middle part of the outer layer pressure marking roller sleeve 5-1 is slightly larger, and more close to the driven pressure marking roller 5, so that the pressing force of the middle part of the driven pressure marking roller 5 can be increased, and the label can be pressed more accurately. After the adjustment, the concentric telescopic rotating handle 5-4 is locked by the locking structure until the current pressure marking work is completed. After the second independent telescopic connecting rod 5-11 is loosened, the torsional spring drives the transmission block 5-8, the first independent telescopic connecting rod 5-10 and the second independent telescopic connecting rod 5-11 to reset automatically, so that the transmission block 5-8 is disconnected with the concentric telescopic transmission screw nut 5-6, and the standby state is entered. Figure 9 and Figure 12 , more close to the driven pressure marking roller 5, so that the pressing force of the middle part of the driven pressure marking roller 5 can be increased, and the label can be pressed more accurately. After the adjustment, the concentric telescopic rotating handle 5-4 is locked by the locking structure until the current pressure marking work is completed. After the second independent telescopic connecting rod 5-11 is loosened, the torsional spring drives the transmission block 5-8, the first independent telescopic connecting rod 5-10 and the second independent telescopic connecting rod 5-11 to reset automatically, so that the transmission block 5-8 is disconnected with the concentric telescopic transmission screw nut 5-6, and the standby state is entered.

[0044] Further, under the axial projection, the transmission blocks 5-8 of the multiple groups of second concentric telescopic transmission assemblies are located at different positions. In this way, different groups of independent telescopic connecting assemblies can be arranged at different circumferential positions to avoid interference between different groups of independent telescopic connecting assemblies and ensure normal independent adjustment operation.

[0045] Embodiment 3

[0046] In combination Figures 1-12 , the working principle of the stable pressure marking mechanism of the embodiment is as follows: The driven pressure marking roller 5 is installed on the movable mounting seat 1, and a stable pressing structure is arranged between the two. This structure can make the driven pressure marking roller 5 always close to the driven pressure marking roller 5. When the thickness of the label changes, the movable mounting seat 1 can adaptively move with the thickness of the label, so as to adjust the pressing distance between the two rollers, so that the pressing force remains stable and can adapt to labels of different thicknesses.

[0047] In order to facilitate the labeling operation, the eccentric structure of the labeling adjusting rod 8 is rotated to push the intermediate transmission member 9 to drive the movable mounting seat 1 to drive the driven labeling roller 5 away from the driving labeling roller 4, so as to expand the roller spacing and facilitate the labeling; after the labeling is completed, the labeling adjusting rod 8 is reset to drive the driven labeling roller 5 to re-approach the driving labeling roller 4 to continue the labeling work.

[0048] In addition, the driven labeling roller 5 is internally provided with a pressure adjusting mechanism, which can be used to adjust the pressure of different parts of the driven labeling roller 5 and the driving labeling roller 4; by operating the concentric telescopic rotating handle 5-4, the internal concentric telescopic assembly can be driven to expand radially, so as to support the specified part of the outer labeling roller sleeve 5-1 to be closer to the driving labeling roller 4, so as to realize the enhancement of the local pressure, which can be used to compensate the deformation of the roller body or adapt to the pressing requirements of different positions on the label, and further improve the labeling quality.

[0049] The labeling machine adopts the above stable labeling mechanism, which can adapt to the change of the label thickness during work, provide continuous and stable pressure, support manual adjustment of the roller spacing to facilitate labeling, and have the ability to adjust the local pressure, which is helpful to improve the consistency and quality of labeling, and is suitable for high-precision labeling operation of different specifications of labels.

[0050] The above is the preferred embodiment of the present application, but the embodiment of the present application is not limited by the above, any change, modification, substitution, combination, simplification made without departing from the spirit and principles of the present application should be equivalent replacement, which is included in the protection scope of the present application.

Claims

1. A stable pressure gauge mechanism characterized by, Includes a label mounting base, a label roller, and a rotary drive mechanism; The label mounting base includes a fixed mounting base and a movable mounting base; the label roller includes an active label roller and a driven label roller, the active label roller being rotatably connected to the fixed mounting base, and the driven label roller being rotatably connected to the movable mounting base; the rotary drive mechanism is mounted on the fixed mounting base, and the drive end of the rotary drive mechanism is poweredly connected to the active label roller; a plurality of stabilizing clamping structures are provided between the fixed mounting base and the movable mounting base for causing the driven label roller to press tightly against the active label roller, and the two ends of the stabilizing clamping structures abut against the fixed mounting base and the movable mounting base respectively.

2. The stable pressure gauge mechanism according to claim 1, wherein The fixed mounting base includes a first fixed mounting base and a second fixed mounting base. The first fixed mounting base is fixedly connected to the second fixed mounting base by a bolt connection structure. The driven pressure roller is located between the active pressure roller and the movable mounting base. The movable mounting base is located between the driven pressure roller and the second fixed mounting base. The stabilizing pressing structure is located between the movable mounting base and the second fixed mounting base.

3. The stable pressure gauge mechanism of claim 2, wherein, The stabilizing clamping structure is an adaptive elastic compression spring, with its two ends abutting against the second fixed mounting base and the movable mounting base, respectively.

4. The stable gauge mechanism of claim 1, wherein, It also includes a label-adjusting mechanism, which comprises a label-adjusting rod and an intermediate transmission component. The label-adjusting rod is rotatably connected to a second fixed mounting base, with a portion of its main body located between a movable mounting base and a driven label-pressing roller. This portion of the main body has an eccentric structure. One end of the label-adjusting rod is provided with a rotating handle. The movable mounting base is provided with a clearance hole for avoiding the label-adjusting rod. The intermediate transmission component is located between the eccentric structure and the movable mounting base. This intermediate transmission component is used to transmit power to the movable mounting base when the label-adjusting rod rotates, thereby driving the driven label-pressing roller on the movable mounting base away from the active label-pressing roller.

5. The stable pressure gauge mechanism of claim 4, wherein, The intermediate transmission component is a friction pad made of polymer material. The movable mounting base is provided with a storage groove for storing the intermediate transmission component, and one end of the friction pad extends into the storage groove.

6. The stable gauge mechanism of claim 1, wherein, The driven pressure roller includes an outer pressure roller sleeve, an inner support cylinder, and a pressure adjustment mechanism; The inner support cylinder is coaxially located inside the outer pressure roller sleeve. The inner support cylinder is connected to the rotating shaft via a bearing, and the rotating shaft is fixedly connected to the movable mounting base. The pressure regulating mechanism includes a concentric telescopic assembly and a concentric telescopic drive mechanism. The concentric telescopic assembly is provided in multiple sets, and the arrangement direction of the multiple sets of concentric telescopic assemblies is parallel to the axis of the inner support cylinder. Each set of concentric telescopic assemblies includes multiple concentric telescopic components evenly arranged in a circumferential direction around the axis of the inner support cylinder. Each concentric telescopic component includes a telescopic sliding part and a telescopic support part. The telescopic sliding part can slide through the inner support cylinder. The telescopic support part has an arc-shaped structure and is located between the inner support cylinder and the outer pressure mark roller sleeve. The outer pressure mark roller sleeve is made of elastic material.

7. The stable pressure gauge mechanism of claim 6, wherein, The concentric telescopic drive mechanism includes a concentric telescopic rotating handwheel and a concentric telescopic transmission assembly. The concentric telescopic transmission assembly includes a first concentric telescopic transmission assembly and a second concentric telescopic transmission assembly. The first concentric telescopic transmission assembly includes a concentric telescopic transmission screw and a concentric telescopic transmission screw nut. The concentric telescopic transmission screw is rotatably connected to the inner cavity of the rotating shaft. One end of the concentric telescopic transmission screw extends to the outer side of the rotating shaft and is fixedly connected to the concentric telescopic rotating handwheel. The concentric telescopic rotating handwheel is connected to a locking structure that locks after rotation. The second concentric telescopic transmission assembly and the concentric telescopic transmission screw nut are provided in multiple sets. Each set of the second concentric telescopic transmission assembly includes a sliding transmission sleeve and a transmission block. The sliding transmission sleeve is slidably sleeved on the outside of the rotating shaft. One end of the transmission block is directly or indirectly set on the concentric telescopic transmission screw nut. The other end of the transmission block passes through the clearance hole of the rotating shaft and contacts the inner wall of the sliding transmission sleeve in the working state. The outer surface of the sliding transmission sleeve is provided with multiple extrusion pulleys arranged circumferentially around the axis of the sliding transmission sleeve. The end of the telescopic sliding part of the concentric telescopic component is provided with a telescopic extrusion inclined surface that cooperates with the extrusion pulleys.

8. The stable pressure gauge mechanism of claim 7, wherein, The pressure regulating mechanism also includes multiple sets of independent telescopic connection components, each set of independent telescopic connection components including a first independent telescopic link and a second independent telescopic link; the transmission block is rotatably connected to the concentric telescopic transmission screw nut, and a torsion spring is provided between the transmission block and the concentric telescopic transmission screw nut to cause the transmission block to disconnect from the concentric telescopic transmission screw nut under non-external force conditions; with the rotation center of the transmission block as the boundary, one end of the transmission block is rotatably connected to one end of the first independent telescopic link, the other end of the first independent telescopic link is movably connected to one end of the second independent telescopic link through an elongated hole, and the other end of the second independent telescopic link passes through the clearance hole of the concentric telescopic rotating handwheel and extends to the front of the concentric telescopic rotating handwheel.

9. The stable pressure gauge mechanism of claim 8, wherein, Under axial projection, the transmission blocks of multiple sets of second concentric telescopic transmission components are located in different positions.

10. A labeling machine, characterized in that, Includes the stable pressure mark mechanism as described in any one of claims 1-9.

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