Constant-tension unreeling device of self-adhesive label printing machine

Abstract

The utility model relates to the technical field of self-adhesive label printing equipment, in particular to a constant-tension unwinding device of a self-adhesive label printing machine. According to the technical scheme, the device comprises a bottom plate and a supporting frame installed on the bottom plate, and further comprises a roller shaft arranged on the supporting frame, and the roller shaft is provided with an expansion and contraction mechanism used for rapidly adjusting the thickness of the roller shaft. According to the utility model, the supporting frame, the roller shaft, the expansion and contraction mechanism, the clamping block mechanism and other structures are matched, and the thickness of the roller is adjusted, so that a reel material keeps proper tension in the printing process, and the quality and the precision of label printing are ensured. Different tension forces may be needed during printing of the winding drums made of different materials, and the printing requirements of various materials can be met by adjusting the thickness of the rolling wheels. In addition, the friction resistance of the winding drum material can be reduced by properly adjusting the thickness of the roller, so that the winding drum runs on the printing machine more smoothly. Therefore, printing speed and efficiency can be improved, and production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of self-adhesive label printing equipment, in particular to a constant tension unwinding device for a self-adhesive label printing machine. Background Art

[0002] Self-adhesive labels are labels that can be attached to the surface of various materials without the use of glue. They are usually made of materials such as polyethylene, polypropylene, polyester, etc., and have the characteristics of being waterproof, wear-resistant, and heat-resistant. Self-adhesive label printing machine is a device specially used for printing self-adhesive labels. It has a constant tension unwinding device that can ensure that the roll maintains a stable tension without the use of glue. The core component of the constant tension unwinding device is that it can achieve precise control of the tension of the roll material by adjusting the spacing of the rollers.

[0003] At present, the thickness of the roller of the constant tension unwinding device is usually not adjustable, which causes the friction of the roller to become too large or too small. When the friction is too large, the pressure on the roll material is concentrated in a local area, which will not only cause local wear and damage; when the friction is too small, the pressure on the roll material during the printing process is unevenly distributed, which will also cause unstable operation of the equipment. Utility Model Content

[0004] The utility model aims to solve the problems existing in the background technology and proposes a constant tension unwinding device for a self-adhesive label printing machine.

[0005] The technical solution of the utility model is: a constant tension unwinding device of a self-adhesive label printing machine, comprising a base plate and a support frame installed on the base plate, and also comprising: a roller shaft arranged on the support frame, the roller shaft being provided with a tensioning and retracting mechanism for quickly adjusting the thickness thereof; a block mechanism installed on one end of the roller shaft for limiting the tensioning and retracting mechanism from changing the thickness.

[0006] Optionally, the expansion and retraction mechanism includes a rotating rod connected to the roller shaft, a pair of rotating disks fixedly connected to the rotating rod are provided inside the roller shaft, a plurality of arc-shaped grooves distributed in a circular array are opened on the rotating disk, driving rods are slidably connected inside the arc-shaped grooves, a plurality of telescopic sliders corresponding to the driving rods are slidably passed through the roller shaft, the telescopic sliders are fixedly connected to one end of the corresponding driving rods, and one end of each pair of telescopic sliders passing through the roller shaft is fixedly connected to an expansion and retraction arc plate with the same spacing for surrounding the roller shaft.

[0007] Optionally, the blocking mechanism includes a rotating block connected to one end of the rotating rod, the rotating block is rotatably connected to the roller shaft, the end of the rotating block away from the rotating rod is fixedly connected to a supporting slider, the supporting slider is slidingly sleeved with an adjusting rotating block, the supporting slider is sleeved with a pulling spring for pulling the adjusting rotating block to slide in the direction of the rotating block, and a plurality of anti-rotation grooves in a circular array are formed on one end of the roller shaft close to the adjusting rotating block, and a plurality of anti-rotation protrusions corresponding to the anti-rotation grooves and used to be inserted into the anti-rotation grooves are fixedly connected to a side of the adjusting rotating block close to the roller shaft.

[0008] Optionally, the supporting slider is provided with a pair of limit sliders for limiting the adjusting rotating block from rotating on the supporting slider.

[0009] Optionally, the support slider is fixedly connected to one end inside the adjusting rotating block with a clamping plate for limiting the adjusting rotating block from separating from the support slider.

[0010] Optionally, an annular stop block is fixedly sleeved on one end of the rotating block away from the rotating rod, the annular stop block is fixedly connected to one end of a pulling spring, and the other end of the pulling spring is fixedly connected to the adjusting rotating block.

[0011] Optionally, one end of the rotating rod away from the rotating block is rotatably connected to the inner wall of the roller shaft.

[0012] Compared with the prior art, the utility model has the following beneficial technical effects:

[0013] The utility model utilizes the coordination of structures such as a support frame, a roller shaft, a contraction mechanism, and a block mechanism, and adjusts the thickness of the roller to maintain appropriate tension during the printing process of the roll material, thereby ensuring the quality and accuracy of label printing. Rolls of different materials may require different tensions during printing, and by adjusting the thickness of the roller, the printing requirements of various materials can be met. In addition, the appropriate adjustment of the thickness of the roller can also reduce the friction resistance of the roll material, allowing the roll to run more smoothly on the printing press. This can improve printing speed and efficiency and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A structural schematic diagram of a constant tension unwinding device for a self-adhesive label printing machine is provided;

[0015] Figure 2 for Figure 1 The structural diagram of the middle roller shaft;

[0016] Figure 3 for Figure 2 Schematic diagram of the cross-section split structure;

[0017] Figure 4 for Figure 3A schematic diagram of a partial structural cross section;

[0018] Figure 5 for Figure 4 Cross-sectional view of the connection between the middle adjustment rotating block and the supporting slider.

[0019] Figure numerals: 1. bottom plate; 2. support frame; 3. roller shaft; 31. expansion and contraction arc plate; 32. rotating block; 33. rotating rod; 34. rotating disk; 35. arc slide groove; 36. telescopic slider; 37. driving rod; 38. anti-rotation groove; 4. adjusting rotating block; 41. supporting slider; 42. clamping plate; 43. limiting slider; 44. anti-rotation protrusion; 45. annular resistance block; 46. pulling spring. DETAILED DESCRIPTION

[0020] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0021] The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0022] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] It should be noted that the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Example

[0027] like Figure 1-5 As shown, the utility model proposes a constant tension unwinding device for a self-adhesive label printing machine, comprising a base plate 1 and a support frame 2 installed on the base plate 1, and also comprising: a roller shaft 3 arranged on the support frame 2, on which a tensioning and retracting mechanism for quickly adjusting the thickness thereof is provided; and a block mechanism installed on one end of the roller shaft 3 for limiting the tensioning and retracting mechanism from changing the thickness.

[0028] Furthermore, the expansion and contraction mechanism includes a rotating rod 33 connected to the roller shaft 3, one end of the rotating rod 33 away from the rotating block 32 is rotatably connected to the inner wall of the roller shaft 3, and a pair of rotating disks 34 fixedly sleeved with the rotating rod 33 are provided inside the roller shaft 3, and a plurality of arc-shaped slide grooves 35 distributed in a circumferential array are provided on the rotating disk 34, and the arc-shaped slide grooves 35 are used to limit the driving rod 37 from sliding along, and then the telescopic slider 36 drives the corresponding expansion and contraction arc plates 31 to open or contract. The driving rod 37 is slidably connected inside the arc-shaped slide grooves 35, and the closer the driving rod 37 is to the rotating rod 33, the thinner the thickness of the expansion and contraction arc plates 31 is opened. On the contrary, the thickness of the expansion and contraction arc plates 31 is opened thicker. A plurality of telescopic sliders 36 corresponding to the driving rods 37 slide through the roller shaft 3, and the telescopic sliders 36 are fixedly connected to one end of the corresponding driving rods 37. One end of each pair of telescopic sliders 36 passing through the roller shaft 3 is fixedly connected to an expansion and contraction arc plate 31 with the same spacing for surrounding the roller shaft 3.

[0029] Secondly, the block mechanism includes a rotating block 32 connected to one end of the rotating rod 33, the rotating block 32 is rotatably connected to the roller shaft 3, and the end of the rotating block 32 away from the rotating rod 33 is fixedly connected to a support slider 41, and a pair of limit sliders 43 are provided on the support slider 41 for limiting the adjustment rotating block 4 from rotating on the support slider 41, and the function of the limit slider 43 is to limit the adjustment rotating block 4 to slide only along the support slider 41. The support slider 41 is fixedly connected to a clamping plate 42 at one end inside the adjustment rotating block 4 for limiting the adjustment rotating block 4 from separating from the support slider 41, and the function of the clamping plate 42 is to limit the sliding stroke of the adjustment rotating block 4 on the support slider 41. The support slider 41 is slidably sleeved with the adjustment rotating block 4, and the support slider 41 is sleeved with a pulling spring 46 for pulling the adjustment rotating block 4 to slide in the direction of the rotating block 32, and the function of the pulling spring 46 is to make the adjustment rotating block 4 automatically move to the anti-rotation groove 38 of the roller shaft 3 when there is no tension. One end of the roller shaft 3 close to the adjusting rotating block 4 is provided with a plurality of anti-rotation grooves 38 in a circumferential array, and one side of the adjusting rotating block 4 close to the roller shaft 3 is fixedly connected with a plurality of anti-rotation protrusions 44 corresponding to the anti-rotation grooves 38 and used to be inserted into the anti-rotation grooves 38.

[0030] Furthermore, an annular stopper 45 is fixedly sleeved on one end of the rotating block 32 away from the rotating rod 33, and the function of the annular stopper 45 is to limit the sliding of the adjusting rotating block 4 toward the rotating block 32. The annular stopper 45 is fixedly connected to one end of a pulling spring 46, and the other end of the pulling spring 46 is fixedly connected to the adjusting rotating block 4.

[0031] In this embodiment, when the constant tension unwinding device of the self-adhesive label printing machine is used, the thickness of the roller is adjusted according to the appropriate tension of the roll material during the printing process. Figure 2 As shown, the adjusting rotating block 4 is pulled in the direction away from the roller shaft 3, and the adjusting rotating block 4 slides along the direction of the supporting slider 41 through the limiting slider 43. When the anti-rotation protrusions 44 on the adjusting rotating block 4 are all out of the anti-rotation grooves 38 on one end of the roller shaft 3. Then the adjusting rotating block 4 is rotated to drive the supporting slider 41, the rotating block 32, the annular stopper 45 and the rotating rod 33 to rotate in sequence. After the rotating rod 33 rotates, it drives a pair of rotating disks 34 thereon to rotate in the roller shaft 3. The rotating disk 34 passes through a plurality of arc-shaped slide grooves 35 thereon, so that the driving rod 37 in the arc-shaped slide groove 35 slides along the arc-shaped slide groove 35. The driving rod 37 drives the corresponding telescopic slider 36 to move in the direction away from the roller shaft 3 through the support of the roller shaft 3. Each pair of telescopic sliders 36 presses against the corresponding expansion and contraction arc plate 31 to open in the direction away from the roller shaft 3, so that the roller can be adjusted to the required thickness.

[0032] After the thickness of the roller is adjusted, it is only necessary to move the adjusting rotating block 4 toward one end of the roller shaft 3, and by pulling the elastic tension of the spring 46, the multiple anti-rotation protrusions 44 on the adjusting rotating block 4 are inserted into the anti-rotation grooves 38 on one end of the roller shaft 3, which saves time and effort. Finally, it not only prevents the rotating block 32 and the rotating rod 33 connected in sequence to the supporting slider 41 from rotating at will, but also prevents the multiple expansion and contraction arc plates 31 from changing after adjustment.

[0033] The preferred embodiments of the utility model of the above utility model are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A constant tension unwinding device for a self-adhesive label printing machine, comprising a base plate (1) and a support frame (2) mounted on the base plate (1), characterized in that: Also includes: A roller shaft (3) is arranged on the support frame (2), and the roller shaft (3) is provided with an expansion and contraction mechanism for quickly adjusting the thickness thereof; A block mechanism is installed on one end of the roller shaft (3) and is used to limit the change in thickness of the expansion and contraction mechanism.

2. The constant tension unwinding device of the self-adhesive label printing machine according to claim 1, characterized in that: The expansion and contraction mechanism comprises a rotating rod (33) connected to the roller shaft (3); a pair of rotating disks (34) fixedly sleeved with the rotating rod (33) are provided inside the roller shaft (3); a plurality of arc-shaped slide grooves (35) distributed in a circumferential array are provided on the rotating disk (34); a driving rod (37) is slidably connected inside the arc-shaped slide grooves (35); a plurality of telescopic sliders (36) corresponding to the driving rod (37) are slidably passed through the roller shaft (3); the telescopic sliders (36) are fixedly connected to one end of the corresponding driving rod (37); and one end of each pair of telescopic sliders (36) passing through the roller shaft (3) is fixedly connected to an expansion and contraction arc plate (31) for surrounding the roller shaft (3) and having the same spacing.

3. The constant tension unwinding device of the self-adhesive label printing machine according to claim 1, characterized in that: The clamping block mechanism comprises a rotating block (32) connected to one end of a rotating rod (33), the rotating block (32) being rotatably connected to the roller shaft (3), the end of the rotating block (32) away from the rotating rod (33) being fixedly connected to a supporting slider (41), the supporting slider (41) being slidably sleeved with an adjusting rotating block (4), the supporting slider (41) being sleeved with a pulling spring (46) for pulling the adjusting rotating block (4) to slide in the direction of the rotating block (32), the end of the roller shaft (3) close to the adjusting rotating block (4) being provided with a plurality of anti-rotation grooves (38) in a circumferential array, and a surface of the adjusting rotating block (4) close to the roller shaft (3) being fixedly connected with a plurality of anti-rotation protrusions (44) corresponding to the anti-rotation grooves (38) and used for being clamped in the anti-rotation grooves (38).

4. The constant tension unwinding device of the self-adhesive label printing machine according to claim 3, characterized in that: The supporting slider (41) is provided with a pair of limiting sliders (43) for limiting the adjusting rotating block (4) from rotating on the supporting slider (41).

5. The constant tension unwinding device of the self-adhesive label printing machine according to claim 3, characterized in that: The support slider (41) is fixedly connected to one end inside the adjusting rotary block (4) with a clamping plate (42) for limiting the adjusting rotary block (4) from separating from the support slider (41).

6. The constant tension unwinding device of the self-adhesive label printing machine according to claim 3, characterized in that: An annular stopper (45) is fixedly sleeved on one end of the rotating block (32) away from the rotating rod (33); the annular stopper (45) is fixedly connected to one end of a pulling spring (46); and the other end of the pulling spring (46) is fixedly connected to the adjusting rotating block (4).

7. The constant tension unwinding device of a self-adhesive label printing machine according to claim 2, characterized in that: One end of the rotating rod (33) away from the rotating block (32) is rotatably connected to the inner wall of the roller shaft (3).

Images