Label tensioning mechanism of labeling machine

Abstract

The utility model belongs to the technical field of labeling equipment, and discloses a label tensioning mechanism of a labeling machine, which comprises a base, an unwinding wheel arranged on the side face of the base, a first tensioning wheel and a third tensioning wheel arranged in front of the unwinding wheel, a second tensioning wheel arranged above the position between the first tensioning wheel and the third tensioning wheel and located at the top end of a swing arm, and the bottom end of the swing arm is hinged to the base. The swing arm is provided with a reset box, the second tensioning wheel is close to the base when the swing arm confronts the reset box to swing downwards, a brake arm is hinged to the side face of the base, a brake block is fixed to the side face of the brake arm and abuts against the unwinding wheel under the action of the independent restorer, and when the swing arm swings downwards, the brake arm is driven to be away from the unwinding wheel. The swing arm and the brake block are not directly connected, so that the force of the brake block for braking the unwinding wheel is not from the reset box, the reset force can be reasonably set, the unwinding wheel is prevented from suddenly stalling and blocking during braking, the tightness self-adjustment of the tensioning mechanism is smoother, and a strip is prevented from being snapped.

Description

Technical Field

[0001] The utility model belongs to the technical field of labeling equipment, and in particular relates to a label tensioning mechanism for a labeling machine. Background Art

[0002] The labeling machine is a device that uses adhesive to stick paper or metal foil labels on specified packaging containers. When the sensor sends a signal that the label object is ready to be labeled, the driving wheel on the labeling machine rotates. Since the roll label is in a tensioned state on the device, when the bottom paper is close to the peeling plate and changes direction, the label has a certain degree of rigidity, and the front end is forced to detach and prepare for labeling. At this time, the label object is just under the label, and synchronous labeling is achieved under the action of the labeling wheel.

[0003] The tensioning mechanism is an important component of the labeling machine, which can prevent the label strip from loosening and affecting the label detachment. Current labeling machines are generally equipped with a special roller swing arm to pull the tensioning strip. When the label strip is loose, the force applied to the swing arm is reduced. The swing arm, under the action of the reset box of its built-in elastic part, drives the brake block to press against the unwinding wheel to restore the tension of the strip. In order to ensure the tensioning force of the swing arm, the elastic force of the reset box is usually set to be larger. However, the large elastic force of the reset box causes the brake block and the unwinding wheel to contact with a larger force, and the unwinding wheel stops suddenly and freezes significantly. In some cases, it can also cause the label strip to break. Utility Model Content

[0004] In order to overcome the above technical problems, the utility model provides a label tensioning mechanism for a labeling machine, in which the swing arm is only responsible for moving the brake block away and does not drive the brake block to stop, thereby preventing the unwinding wheel from stopping suddenly and getting stuck.

[0005] The utility model adopts the following technical solutions:

[0006] A label tensioning mechanism of a labeling machine comprises a base, a unwinding wheel is rotatably arranged on the side of the base, a tensioning wheel one is rotatably arranged in front of the unwinding wheel on the base, and a tensioning wheel three is rotatably arranged in front of the unwinding wheel, a tensioning wheel two is arranged above the tensioning wheel one and the tensioning wheel three, the tensioning wheel two is rotatably connected to the top end of a swing arm, the bottom end of the swing arm is hinged to the base, a reset box is provided between the hinge shaft of the swing arm and the base, and when the swing arm swings down against the reset box, the tensioning wheel two approaches the base, and a brake arm is hinged on the side of the base, and a brake block is fixed to the side of the brake arm, and the brake block abuts against the unwinding wheel under the action of an independent resetter, and the brake arm is driven away from the unwinding wheel when the swing arm swings down.

[0007] Preferably, the swing arm is fixedly connected to a support rod, a roller is rotatably provided at the bottom end of the support rod, and the roller abuts against the brake arm.

[0008] Preferably, the independent resetter includes a support plate fixedly arranged on the side of the base, and a spring arranged between the support plate and the brake arm.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] The swing arm and the brake block in the utility model are not directly connected, the swing arm abuts the brake arm to drive the brake block to leave the unwinding wheel, and the brake block abuts the unwinding wheel to brake under the action of an independent resetter. In this way, the force of the brake block when braking the unwinding wheel does not come from the reset box, and the reset force can be reasonably set to prevent the unwinding wheel from suddenly stopping and getting stuck when braking. The tension self-adjustment of the tensioning mechanism is smoother to prevent the strip from breaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is the overall schematic diagram of the utility model (I);

[0012] Figure 2 It is an overall schematic diagram of the utility model (excluding the unwinding wheel);

[0013] Figure 3 It is the overall schematic diagram of the utility model (II).

[0014] Description of reference numerals:

[0015] 1 tensioning wheel one; 2 tensioning wheel two; 3 tensioning wheel three; 4 base; 5 swing arm; 51 reset box; 6 unwinding wheel; 7 brake arm; 71 brake block; 8 independent reset device; 81 support plate; 82 spring; 9 support rod; 91 roller. DETAILED DESCRIPTION

[0016] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. Unless otherwise specified, the raw materials and equipment used can be purchased from the market or are commonly used in the art. The methods in the embodiments are conventional methods in the art unless otherwise specified. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0017] A label tensioning mechanism for a labeling machine includes a base 4, which can be a frame of the labeling machine, a reel 6 is rotatably arranged on the side of the base 4, a tensioning wheel 1 is rotatably arranged in front of the reel 6, and a tensioning wheel 3 3 is rotatably arranged in front of the base 4, a tensioning wheel 2 2 is arranged above the tensioning wheel 1 1 and the tensioning wheel 3 3, the tensioning wheel 2 2 is rotatably connected to the top of a swing arm 5, the bottom end of the swing arm 5 is hinged to the base 4, a reset box 51 is provided between the hinge shaft of the swing arm 5 and the base 4, and the swing arm 5 swings down against the reset box 51 When the tensioning wheel 2 is close to the base 4, a brake arm 7 is hinged on the side of the base 4, and a brake block 71 is fixed on the side of the brake arm 7. The brake block 71 abuts against the unwinding wheel 6 under the action of an independent resetter 8. The independent resetter 8 includes a support plate 81 fixedly arranged on the side of the base 4, and a spring 82 arranged between the support plate 81 and the brake arm 7. The swing arm 5 is fixedly connected with a support rod 9. A roller 91 is rotatably arranged at the bottom end of the support rod 9. The roller 91 abuts against the brake arm 7. When the swing arm 5 swings down, it drives the brake arm 7 away from the unwinding wheel 6.

[0018] A label tensioning mechanism for a labeling machine, when used:

[0019] The label strip is pulled forward by the terminal, and the traction causes the strip to exert force on the tensioning wheel 2 to drive the swing arm 5 to swing down through a certain angle. In this working state, the swing arm 5 presses down the brake arm 7 through the support rod 9 and the roller 91 so that the brake block 71 does not contact the unwinding wheel 6; when the strip is loose, the swing arm 5 swings up under the action of the reset box 51, and the brake block 71 and the brake arm 7 abut against the unwinding wheel 6 under the elastic force of the spring 82, slowing down the rotation speed of the unwinding wheel 6 or gradually stopping the unwinding wheel 6; after the strip is re-tightened under the action of the traction end, the swing arm 5 is driven to swing down again, and the mechanism resumes the working state.

[0020] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the above embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A label tensioning mechanism for a labeling machine, comprising a base, a side of the base being rotatably provided with an unwinding wheel, characterized in that: The base is provided with a tensioning wheel one in front of the unwinding wheel for rotation, and a tensioning wheel three is provided in front of the base for rotation. A tensioning wheel two is provided above the tensioning wheel one and the tensioning wheel three. The tensioning wheel two is rotatably connected to the top end of the swing arm. The bottom end of the swing arm is hinged to the base. A reset box is provided between the hinge shaft of the swing arm and the base. When the swing arm swings down against the reset box, the tensioning wheel two approaches the base. A brake arm is hinged on the side of the base. A brake block is fixed on the side of the brake arm. The brake block abuts against the unwinding wheel under the action of an independent resetter. When the swing arm swings down, the brake arm is driven away from the unwinding wheel.

2. The label tensioning mechanism of a labeling machine according to claim 1, characterized in that: The swing arm is fixedly connected with a support rod, and a roller is rotatably arranged at the bottom end of the support rod, and the roller abuts against the brake arm.

3. The label tensioning mechanism of a labeling machine according to claim 1, characterized in that: The independent resetter comprises a supporting plate fixedly arranged on the side of the base, and a spring arranged between the supporting plate and the brake arm.

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