A label printer tensioning device

Abstract

The utility model discloses a kind of label printing machine tensioning device, belong to label printing machine technical field.A kind of label printing machine tensioning device, including the rear platform of being installed in the front end of rack and the first tensioning roller being set below rear platform, the first tensioning roller is slid by the sliding of rear platform following adjusting assembly, the adjusting assembly includes the guide ring for driving first tensioning roller to slide downwards and the guide rail of making guide ring stable rotation;The utility model passes through setting adjusting assembly, under the cooperation of guide ring and guide rod, when rear platform is withdrawn, guide rod is slid in guide ring by slider, to make first tensioning roller synchronous drop, reach the purpose of synchronous tensioning, improve reaction speed, to bottom paper tension.

Description

Technical Field

[0001] This utility model relates to the field of label printing machine technology, and in particular to a tensioning device for a label printing machine. Background Technology

[0002] A printing press is a machine for printing text and images. A modern printing press generally consists of mechanisms for plate mounting, inking, impression, and paper feeding. Its principle is to first create a printing plate containing the text or image to be printed, mount it on the printing press, and then manually or through the press, apply ink to the areas of the printing plate containing the text and image, directly or indirectly transferring it to paper or other substrates. The colors on the printed product are achieved by applying ink to the printing plate rollers mounted on the printing press; different products have varying color requirements.

[0003] Existing label printing machines complete multi-color printing and varnishing on rolls of self-adhesive material (consisting of a backing paper and a face label) before feeding it directly into a feeding mechanism. The feeding mechanism precisely and stably separates individual labels from the backing paper, making them easy to grip and apply directly, saving processes and transfer time.

[0004] When separating the label from the backing paper, a retraction-style separation method is usually used for easier gripping. This method involves a retraction platform that suddenly changes direction and retracts the backing paper at the separation point. Utilizing the label's own stiffness and inertia, the label is "thrown" out at the separation point and held in a suspended, relatively stationary preparatory position. Because the retraction platform needs to retract quickly to ensure separation, the tensioning mechanism needs to react rapidly to tighten the backing paper. However, existing tensioning mechanisms are slow to react. When the retraction platform retracts rapidly, the tensioning mechanism has a certain lag, resulting in the backing paper not being tightened immediately. The loose backing paper can easily lead to label separation errors, affecting the gripping of the label. Utility Model Content

[0005] The purpose of this invention is to solve the problem of slow response of tensioning mechanisms in the prior art, and to propose a tensioning device for a label printing machine.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A tensioning device for a label printing machine includes a retraction platform installed at the front end of the frame and a first tensioning roller disposed below the retraction platform. The first tensioning roller slides along with the retraction platform via an adjusting component. The adjusting component includes a guide ring for driving the first tensioning roller to slide downward and a guide rail for stabilizing the rotation of the guide ring.

[0007] In some embodiments, the first tension roller rotates on the surface of the slider, and the retraction platform has a groove on the side near the frame, and the slider slides inside the groove.

[0008] In some embodiments, the upper end of the guide ring rotates on the back of the frame, and the guide ring is obliquely arranged. A guide rod slides inside the guide ring, and the guide rod is fixed to the back of the slider.

[0009] In some embodiments, the guide rail is fixed to the back of the frame and located at the lower end of the guide ring. The guide rail is arc-shaped and is concentric with the rotation axis of the guide ring.

[0010] In some embodiments, the guide ring slides inside the guide rail via a guide block, and the guide block is fixed to the lower end of the guide ring.

[0011] In some embodiments, the guide ring is rotated by a transmission assembly, the transmission assembly including a first threaded post rotating on the back of the frame and a movable block threadedly connected to the surface of the first threaded post, the movable block having a pull rod hinged to its side, the other end of the pull rod being hinged to the lower surface of the guide ring.

[0012] In some embodiments, a tensioning assembly is fixed to the bottom of the frame. The tensioning assembly includes a second tensioning roller that rotates on the surface of the connecting block and a vertical rod that is fixed to the surface of the mounting frame. The connecting block slides vertically on the surface of the vertical rod, and a spring that pulls the connecting block to slide downwards is sleeved on the surface of the vertical rod.

[0013] In some embodiments, the mounting bracket has a second threaded post rotatably mounted on its bottom, and a threaded tube is threadedly connected to the surface of the second threaded post. The threaded tube slides on the surface of the upright through an adjusting plate, and the spring is fixed to the upper surface of the adjusting plate.

[0014] Compared with the prior art, the present invention provides a tensioning device for a label printing machine, which has the following beneficial effects.

[0015] 1. This utility model, by setting an adjustment component, with the cooperation of the guide ring and the guide rod, allows the guide rod to slide within the guide ring via the slider when the retracting platform retracts, thereby causing the first tensioning roller to descend synchronously, achieving the purpose of synchronous tensioning, improving the response speed, and tightening the bottom paper.

[0016] 2. In this utility model, the guide ring is driven to rotate by the transmission component, and the tilt angle of the guide ring is adjusted, thereby adjusting the descent distance of the first tension roller. When the retraction platform slides backward, the first tension roller tightens the bottom paper to a suitable degree. By setting guide rails and guide blocks, the stability of the guide ring is improved, and the deformation of the guide ring is avoided, which would cause the descent distance of the first tension roller to deviate.

[0017] Other advantages, objectives and features of this invention will be set forth in part in the description which follows; and in part will be apparent to those skilled in the art upon examination of the following description; or may be taught from practice of this invention. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the axial structure of this utility model.

[0019] Figure 2 This is a front view structural diagram of the present invention.

[0020] Figure 3 This is a schematic diagram of the retraction platform in this utility model.

[0021] Figure 4 This is a schematic diagram of the adjustment component in this utility model.

[0022] Figure 5 This utility model Figure 4 Enlarged structural diagram at point A in the middle.

[0023] Figure 6 This is a schematic diagram of the tensioning component in this utility model.

[0024] In the picture: 1. Frame; 2. Retractable platform; 201. Slide rail; 202. Connecting rod; 203. Electric push rod; 3. First tension roller; 301. Slide groove; 302. Slider; 303. Through groove; 4. Guide ring; 401. Guide rod; 5. Guide rail; 501. Guide block; 6. Transmission assembly; 601. First threaded post; 602. Moving block; 603. Pull rod; 7. Tensioning assembly; 701. Second tension roller; 702. Connecting block; 703. Upright pole; 704. Mounting bracket; 705. Spring; 706. Second threaded post; 707. Threaded tube; 708. Adjusting plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Reference Figure 1-6 A tensioning device for a label printing machine includes a retraction platform 2 installed at the front end of a frame 1 and a first tensioning roller 3 disposed below the retraction platform 2. The first tensioning roller 3 slides along with the retraction platform 2 via an adjustment component. The retraction platform 2 slides horizontally on the surface of the frame 1 via two slide rails 201. Both slide rails 201 are fixed to the surface of the frame 1. A connecting rod 202 is fixed to the surface of the retraction platform 2. The other end of the connecting rod 202 passes through the frame 1 and is fixed to an electric push rod 203. The other end of the electric push rod 203 is fixed to the back of the frame 1. The connecting rod 202 is located between the two slide rails 201. A clearance groove for the sliding of the connecting rod 202 is provided on the surface of the frame 1.

[0027] Understandably, the operation of the electric push rod 203 drives the connecting rod 202 to make the retracting platform 2 slide rapidly on the surface of the slide rail 201. At the same time, the first tension roller 3 tightens the back paper, and under the action of inertia and the stiffness of the label itself, the label separates from the back paper.

[0028] Specifically, the first tension roller 3 rotates on the surface of the slider 302, and the retraction platform 2 has a groove 301 on the side near the frame 1. The slider 302 slides inside the groove 301. The surface of the frame 1 has a through groove 303, which corresponds to the groove 301.

[0029] It is understandable that by setting the first tensioning roller 3 below the retraction platform 2, the first tensioning roller 3 can move with the retraction platform 2, and the first tensioning roller 3 can slide down quickly by adjusting the retraction platform 2 to achieve synchronous tensioning and improve the response speed.

[0030] Specifically, the adjustment assembly includes a guide ring 4 for driving the first tension roller 3 to slide downward and a guide rail 5 for stabilizing the rotation of the guide ring 4. The upper end of the guide ring 4 rotates on the back of the frame 1 and the guide ring 4 is obliquely arranged with the upper end of the guide ring 4 facing the front end of the frame 1. A guide rod 401 slides inside the guide ring 4 and the guide rod 401 is fixed on the back of the slider 302.

[0031] It is understandable that by setting the guide ring 4, in cooperation with the guide rod 401, when the retracting platform 2 retracts, the slider 302 drives the guide rod 401 to slide within the guide ring 4, thereby causing the first tensioning roller 3 to descend synchronously and tighten the bottom paper.

[0032] Specifically, the guide rail 5 is fixed on the back of the frame 1 and located at the lower end of the guide ring 4. The guide rail 5 is arc-shaped and is concentric with the rotation axis of the guide ring 4. The guide ring 4 slides inside the guide rail 5 through the guide block 501, which is fixed at the lower end of the guide ring 4.

[0033] It is understandable that by rotating the guide ring 4, the tilt angle of the guide ring 4 is adjusted, thereby adjusting the descent distance of the first tension roller 3. When the retracting platform 2 slides backward, the first tension roller 3 tightens the bottom paper to a suitable degree. By setting the guide rail 5 and the guide block 501, the stability of the guide ring 4 is improved, and the deformation of the guide ring 4 is avoided, which would cause the descent distance of the first tension roller 3 to deviate.

[0034] Specifically, the guide ring 4 rotates through the transmission assembly 6. The transmission assembly 6 includes a first threaded post 601 that rotates on the back of the frame 1 and a moving block 602 that is threadedly connected to the surface of the first threaded post 601. A pull rod 603 is hinged to the side of the moving block 602, and the other end of the pull rod 603 is hinged to the lower surface of the guide ring 4. A handle is fixed to the lower end of the first threaded post 601.

[0035] It is understandable that the first threaded post 601 is rotated by the handle, causing the moving block 602 to rise and fall, thereby causing the pull rod 603 to drive the guide ring 4 to rotate and adjust its tilt angle.

[0036] Specifically, a tensioning assembly 7 is fixed at the bottom of the frame 1. The tensioning assembly 7 is located in front of the bottom paper winding wheel. The tensioning assembly 7 includes a second tensioning roller 701 that rotates on the surface of the connecting block 702 and a vertical rod 703 fixed on the surface of the mounting frame 704. The connecting block 702 slides vertically on the surface of the vertical rod 703. The vertical rod 703 is square. The mounting frame 704 is fixed at the bottom of the frame 1. A spring 705 is sleeved on the surface of the vertical rod 703 to pull the connecting block 702 downward. The spring 705 is located below the connecting block 702. The bottom of the mounting bracket 704 has a second threaded post 706 that rotates. The surface of the second threaded post 706 is threadedly connected to a threaded tube 707. The threaded tube 707 is fixed to the lower surface of the adjusting plate 708. The adjusting plate 708 slides on the surface of the upright 703. The spring 705 is fixed to the upper surface of the adjusting plate 708. The lower end of the second threaded post 706 is fixed with a rotating handle.

[0037] Understandably, the bottom paper is passed under the second tension roller 701, causing the bottom paper to slide upwards along the second tension roller 701, maintaining a certain initial pressure on the second tension roller 701. The spring 705 pulls the connecting block 702 to tighten the bottom paper with the second tension roller 701. By rotating the second threaded column 706, the threaded tube 707 and the adjusting plate 708 are raised and lowered, thereby adjusting the stroke of the spring 705 and facilitating the adjustment of the initial pressure of the second tension roller 701.

[0038] In this invention, after the label is printed by the label printing machine, it is continuously conveyed to the front-end retraction platform 2, where the label is separated from the backing paper and directly applied to the product. During this process, the electric push rod 203 drives the connecting rod 202 and the retraction platform 2 to slide rapidly backward on the surface of the slide rail 201. With the cooperation of the guide rod 401 and the guide ring 4, the slider 302 slides downward in the slide groove 301, so that the first tension roller 3 simultaneously tightens the backing paper. Under the action of inertia and the stiffness of the label itself, the label is separated from the backing paper. After the retraction platform 2 is reset, the first tension roller 3 is reset simultaneously. When the tension pressure of the first tension roller 3 is not appropriate, the first threaded column 601 is rotated by the handle, and the guide ring 4 is rotated by the pull rod 603 to adjust its tilt angle, thereby adjusting the descent distance of the first tension roller 3.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0040] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples; although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A tensioning device for a label printing machine, characterized in that, It includes a retraction platform (2) installed at the front end of the frame (1) and a first tension roller (3) set below the retraction platform (2). The first tension roller (3) slides along with the sliding of the retraction platform (2) through an adjustment component. The adjustment component includes a guide ring (4) for driving the first tension roller (3) to slide downward and a guide rail (5) for stabilizing the rotation of the guide ring (4).

2. The tensioning device for a label printing machine according to claim 1, characterized in that, The first tension roller (3) is rotatably connected to the surface of the slider (302). The retraction platform (2) is provided with a groove (301) on the side near the frame (1). The slider (302) is slidably connected inside the groove (301).

3. The tensioning device for a label printing machine according to claim 1, characterized in that, The upper end of the guide ring (4) is rotatably connected to the back of the frame (1), and the guide ring (4) is obliquely arranged. A guide rod (401) slides inside the guide ring (4), and the guide rod (401) is fixed to the back of the slider (302).

4. The tensioning device for a label printing machine according to claim 1, characterized in that, The guide rail (5) is fixed on the back of the frame (1) and located at the lower end of the guide ring (4). The guide rail (5) is arc-shaped and is concentric with the rotation axis of the guide ring (4).

5. A tensioning device for a label printing machine according to claim 1, characterized in that, The guide ring (4) is slidably connected to the inside of the guide rail (5) via the guide block (501), and the guide block (501) is fixed at the lower end of the guide ring (4).

6. The tensioning device for a label printing machine according to claim 1, characterized in that, The guide ring (4) rotates via a transmission assembly (6), which includes a first threaded post (601) rotatably connected to the back of the frame (1) and a moving block (602) threadedly connected to the surface of the first threaded post (601). A pull rod (603) is hinged to the side of the moving block (602), and the other end of the pull rod (603) is hinged to the lower surface of the guide ring (4).

7. A tensioning device for a label printing machine according to claim 1, characterized in that, The frame (1) has a tensioning assembly (7) fixed at the bottom. The tensioning assembly (7) includes a second tensioning roller (701) rotatably connected to the surface of the connecting block (702) and a vertical rod (703) fixed to the surface of the mounting frame (704). The connecting block (702) is vertically slidably connected to the surface of the vertical rod (703). A spring (705) is sleeved on the surface of the vertical rod (703) to pull the connecting block (702) downward.

8. A tensioning device for a label printing machine according to claim 7, characterized in that, The mounting bracket (704) is rotatably connected to a second threaded post (706) at its bottom. A threaded tube (707) is threadedly connected to the surface of the second threaded post (706). The threaded tube (707) is slidably connected to the surface of the upright (703) via an adjusting plate (708). The spring (705) is fixed to the upper surface of the adjusting plate (708).

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