Unwinding type plastic bag labeling device

Abstract

The utility model belongs to the technical field of plastic bag rolling, and particularly relates to an unrolling type plastic bag labeling device which comprises a labeling support and a material belt traction conveying mechanism, and the labeling support comprises a stripping supporting plate and a mounting support erected above the stripping supporting plate and fixedly connected with the stripping supporting plate. And correlation diodes are correspondingly mounted at the label stripping end in the stripping supporting plate and the upper end of the mounting bracket. Whether a plastic bag exists on the upper end face of the label stripping end of the stripping supporting plate or not is sensed through the correlation diodes, when the tail end of the plastic bag completely shields a signal of the correlation diodes, the signal is used as a signal for preparing labeling operation, and when the tail end of the plastic bag relieves signal shielding of the correlation diodes, the signal is used as a signal for starting labeling operation. At the moment, a control system of the roll changing machine controls the material belt traction conveying mechanism to drive the label backing paper to move, labeling operation is carried out, and the accuracy of the labeling position is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of plastic bag winding, specifically relates to a loose winding type plastic bag labeling device. BACKGROUND

[0002] The winding mode of plastic bags has two different states of tight winding and loose winding.

[0003] Tight winding is a relatively tight and solid winding mode, through accurate control of winding strength and tension, the plastic bags are firmly wound together, reducing the possibility of slackening and deformation. When fine operations such as labeling are required, the tight winding state can ensure the flatness and stability of the surface of the plastic bags, providing a strong guarantee for accurate labeling.

[0004] Loose winding is a relatively loose winding mode, which is convenient for subsequent unfolding and use, but in some application scenarios, such as the labeling link, it is easy to lack sufficient tightness and affect the accuracy of operation, so that loose winding is difficult to achieve the expected accuracy when labeling. SUMMARY

[0005] The technical problem to be solved by the utility model is to provide a loose winding type plastic bag labeling device in view of the deficiencies of the prior art, and the utility model can improve the labeling accuracy of plastic bags in the loose winding state.

[0006] The scheme is realized through the following technical measures: a loose winding type plastic bag labeling device, comprising a labeling support and a material belt traction conveying mechanism, the labeling support comprises a stripping support plate and a mounting support arranged above the stripping support plate and fixedly connected thereto, and a pair of diodes are arranged on the stripping support plate corresponding to the label stripping end and the upper end of the mounting support.

[0007] Preferably, a tail wind pipe is arranged above the stripping support plate, an inclined air outlet structure is formed in the tail wind pipe, and the air outlet direction of the inclined air outlet structure is inclined from the label stripping end of the stripping support plate to the end opposite to the label stripping end from top to bottom.

[0008] Preferably, the inclined air outlet structure is a strip-shaped inclined air outlet or a plurality of inclined air outlet holes formed in the tail wind pipe in the width direction of the finished product loose winding.

[0009] Preferably, a plurality of diode mounting holes with equal number and one or two in number are formed in the stripping support plate and the mounting support corresponding to the width coverage range of the finished product loose winding, and a pair of diodes are arranged in at least one diode mounting hole in the stripping support plate and the mounting support.

[0010] Preferably, when two diode mounting holes are respectively arranged on the stripping support and the mounting support, and only one diode mounting hole is used for mounting the opposite diode, along the width direction of the finished loose roll, the receiver and the transmitter of the opposite diode are respectively arranged in the two diode mounting holes on the same side of the stripping support and the mounting support.

[0011] Or when two diode mounting holes are respectively arranged on the stripping support and the mounting support, and both of the two diode mounting holes are used for mounting the opposite diode and only one opposite diode works, along the width direction of the finished loose roll, the receiver and the transmitter of the working opposite diode are respectively arranged in the two diode mounting holes on the same side of the stripping support and the mounting support.

[0012] Preferably, a label peeling end of the stripping support is fixedly connected with a label sticking brush.

[0013] Preferably, one end of the stripping support opposite to the label sticking brush is fixedly connected with a connecting shaft, one end of the connecting shaft is fixedly connected with one end of an adapter, the other end of the adapter is rotatably connected with an end of a piston rod of a label sticking cylinder, and the label sticking cylinder is obliquely arranged.

[0014] Preferably, the oblique air outlet structure and the mounting support are sequentially arranged from front to back along the moving direction of the label to be stuck.

[0015] The present application has the following beneficial effects:

[0016] 1. The present application can determine whether there is a plastic bag on the upper end face of the label peeling end of the stripping support through the opposite diode: when the tail end of the plastic bag completely blocks the signal of the opposite diode, the signal is used as a signal for preparing the label sticking operation; when the tail end of the plastic bag removes the signal blocking of the opposite diode, the signal is used as a signal for starting the label sticking operation; at this time, the control system of the roll changing machine controls the label base paper to move through the tape traction conveying mechanism, and the label sticking operation is performed, so that the accuracy of the label sticking position is ensured.

[0017] 2. The present application can blow the tail end of the plastic bag to be flat through the oblique air outlet or the oblique air outlet hole, so that the tail end of the plastic bag is flatly arranged on the upper end face of the label peeling end of the stripping support, so that the label can be better stuck to the tail end of the plastic bag during the subsequent label sticking, and the accuracy of the label sticking is further ensured.

[0018] Therefore, compared with the prior art, the present application has substantial characteristics and progress. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The present application is a three-dimensional structure schematic diagram of the specific embodiment.

[0020] Figure 2The utility model discloses a partial structure schematic view of the specific embodiment.

[0021] Fig. 3 is a structural schematic view of the tail wind pipe.

[0022] In the figure, 1 is a material tape traction conveying mechanism, 2 is a diode mounting hole, 3 is a finished product loose roll, 4 is a tail wind pipe, 5 is a pair of diodes, 6 is a mounting support, 7 is a stripping support plate, 8 is a label device frame body, 9 is a label material tape, 10 is a label base paper, 11 is a labeling cylinder, 12 is an adapter, 13 is a connecting shaft, 14 is a labeling brush, 15 is an inclined air outlet hole, 16 is the tail end of a plastic bag, and 17 is a winding assembly. Specific embodiment

[0023] In order to clearly illustrate the technical features of the scheme, the scheme will be described below through a specific embodiment and in combination with its accompanying drawings.

[0024] A label device for a loose roll type plastic bag comprises a labeling support and a material tape traction conveying mechanism 1 (the material tape traction conveying mechanism 1 adopts a material tape traction conveying mechanism of a labeling machine in the prior art), the labeling support comprises a stripping support plate 7 and a mounting support 6 arranged above the stripping support plate 7 and fixedly connected with the stripping support plate 7, a pair of diodes 5 are arranged at the label stripping end of the stripping support plate 7 and the upper end of the mounting support 6 in correspondence, a labeling brush 14 is fixedly connected below the label stripping end of the stripping support plate 7, and the labeling brush 14 is used to support the front half of the label stripped from the label stripping end of the stripping support plate 7 on the label material tape 9; during the labeling operation, the labeling brush 14 can ensure that the front half of the label is evenly pasted on the finished product loose roll 3, the finished product loose roll 3 continues to rotate with the winding assembly 17 of the roll changer, the label base paper 10 is moved by the material tape traction conveying mechanism 1, the rear half of the label automatically strips the label base paper 10 in the label material tape 9 and is pasted on the tail end 16 of the plastic bag under the support of the labeling brush 14. One end of a connecting shaft 13 is fixedly connected with the end of the stripping support plate 7 opposite to the labeling brush 14, one end of the connecting shaft 13 is fixedly connected with one end of an adapter 12, the other end of the adapter 12 is rotationally connected with the piston rod end of a labeling cylinder 11, and the labeling cylinder 11 is obliquely arranged.

[0025] The peeling support plate 7 and the mounting bracket 6 are correspondingly provided with a same number of diode mounting holes 2, and the number of the diode mounting holes 2 is one or two. The diode mounting holes 2 are located in the width coverage of the finished loose roll 3. At least one diode mounting hole 2 on the peeling support plate 7 and the mounting bracket 6 is correspondingly provided with a corresponding diode 5. That is, the peeling support plate 7 and the mounting bracket 6 can be respectively provided with one diode mounting hole 2. At this time, the receiver and the transmitter of the diode 5 are respectively mounted in the diode mounting hole 2 on the peeling support plate 7 and the mounting bracket 6. The peeling support plate 7 and the mounting bracket 6 can also be respectively provided with two diode mounting holes 2. When the peeling support plate 7 and the mounting bracket 6 are respectively provided with two diode mounting holes 2, the diode 5 can be installed in the following two ways:

[0026] (1) When the peeling support plate 7 and the mounting bracket 6 are respectively provided with two diode mounting holes 2, and only one diode mounting hole 2 is used to mount the diode 5, along the width direction of the finished loose roll 3, the receiver and the transmitter of the diode 5 are respectively mounted in the two diode mounting holes 2 on the same side of the peeling support plate 7 and the mounting bracket 6.

[0027] (2) When the peeling support plate 7 and the mounting bracket 6 are respectively provided with two diode mounting holes 2, and both of the diode mounting holes 2 are used to mount the diode 5, and only one diode 5 works, along the width direction of the finished loose roll 3, the receiver and the transmitter of the working diode 5 are respectively mounted in the two diode mounting holes 2 on the same side of the peeling support plate 7 and the mounting bracket 6.

[0028] After the diode 5 is installed in the above structure, the transmitter and the receiver of the diode 5 cooperate to sense whether there is a plastic bag on the labeling end of the peeling support plate 7. When the tail end 16 of the plastic bag is laid flat on the labeling end of the peeling support plate 7, the tail end 16 of the plastic bag will block the signal of the diode 5. When the plastic bag continues to be rolled, the tail end 16 of the plastic bag will gradually move away from the peeling support plate 7 and remove the signal blocking of the diode 5. At this time, the receiver of the diode 5 again receives the signal, and the tape traction conveying mechanism 1 pulls the label base paper 10 to move, so that the rear half of the label on the labeling end of the peeling support plate 7 is gradually peeled off from the label base paper 10 and attached to the tail end 16 of the plastic bag, and the labeling work is completed.

[0029] The blowing tail air pipe 4 is provided above the stripping support plate 7, and the inclined air outlet structure is provided on the blowing tail air pipe 4, and the air outlet direction of the inclined air outlet structure is inclined from the label stripping end of the stripping support plate 7 to the end opposite to the label stripping end from top to bottom. The inclined air outlet structure and the mounting bracket 6 are sequentially arranged from front to back along the moving direction of the label to be attached. The inclined air outlet structure is a strip-shaped inclined air outlet or a plurality of inclined air outlet holes 15 provided on the blowing tail air pipe 4 along the width direction of the finished loose roll 3. The blowing tail air pipe 4 is connected with an air pump (not shown in the figure) to supply air to the inclined air outlet and the inclined air outlet hole 15.

[0030] The air pump supplies air to the blowing tail air pipe 4, and the air is blown out through the inclined air outlet or the inclined air outlet hole 15 to form an inclined air flow, which blows the tail end 16 of the plastic bag to be flat and makes the tail end 16 of the plastic bag flat on the end face of the label stripping end of the stripping support plate 7, so as to ensure that the tail end 16 of the plastic bag can be better attached to the label after the tail end 16 of the plastic bag leaves the photoelectric diode 5, and at the same time, it can be ensured that the tail end 16 of the plastic bag will completely block the signal of the photoelectric diode 5, as a signal for preparing the label attaching operation, and when the tail end 16 of the plastic bag removes the signal blocking of the photoelectric diode 5, it is a signal for starting the label attaching operation. At this time, the control system of the roll changing machine controls the label base paper 10 to move by the tape traction conveying mechanism 1 to perform the label attaching operation, and ensures the accuracy of the label attaching position.

[0031] The loose roll type plastic bag label attaching device is part of the roll changing machine for performing the winding operation on the plastic bag. In the normal standby state, the stripping support plate 7 and the label attaching brush 14 are inclined downward. When the winding quantity of the roll changing machine reaches the preset target, the finished loose roll 3 is sent to the loose roll type plastic bag label attaching device, the finished loose roll 3 rotates at a low speed, the piston rod of the label attaching cylinder 11 is retracted and drives the connecting shaft 13 and the stripping support plate 7 to rotate through the adapter 12, so that the stripping support plate 7 and the label attaching brush 14 are raised and close to the finished loose roll 3 to be attached with labels. The front half of the label peeled off at the label stripping end of the stripping support plate 7 is evenly attached to the finished loose roll 3, and at the same time, the blowing tail air pipe 4 starts to blow air. When the tail end 16 of the plastic bag in the finished loose roll 3 rotates to the air outlet, the tail end 16 of the plastic bag is quickly flattened on the stripping support plate 7 by the force of the air and blocks the photoelectric diode 5. The finished loose roll 3 is still rotating at a low speed, so that the tail end 16 of the plastic bag moves away from the photoelectric diode 5 and removes the blocking of the photoelectric diode 5. When the receiver of the photoelectric diode 5 receives the signal, the control system of the roll changing machine controls the blowing tail air pipe 4 to stop blowing air, and the label base paper 10 is moved by the tape traction conveying mechanism 1 to a specified length, so that the label to be attached is completely peeled off from the label base paper 10 and attached to the tail end 16 of the plastic bag, and a label attaching operation is completed.

[0032] The technical features not described in the utility model can be realized by the prior art, and will not be described here again. The utility model is not limited to the above specific embodiments, and changes, modifications, additions or replacements made by those skilled in the art within the essential scope of the utility model should also belong to the protection scope of the utility model.

Claims

1. A loose-roll plastic bag labeling device, comprising a labeling bracket and a material belt traction and conveying mechanism, characterized by: The labeling bracket includes a stripping support plate and a mounting bracket mounted on and fixedly connected to the stripping support plate. The label stripping end of the stripping support plate and the upper end of the mounting bracket are correspondingly mounted with a through-beam diode.

2. The roll-type plastic bag labeling device according to claim 1, characterized in that: A tail air blowing pipe is provided above the stripping support plate, and an inclined air outlet structure is provided on the tail air blowing pipe, and the air outlet direction of the inclined air outlet structure is inclined downward from the label stripping end of the stripping support plate to the end opposite to the label stripping end.

3. The roll-type plastic bag labeling device according to claim 2, characterized in that: The inclined air outlet structure is a strip-shaped inclined air outlet or a plurality of inclined air outlet holes opened on the tail air blowing pipe along the width direction of the finished product loose roll.

4. The roll-to-roll plastic bag labeling device according to claim 1, 2 or 3, characterized in that: The stripping support plate and the mounting bracket are provided with an equal number of diode mounting holes, one or two in number respectively. The diode mounting holes are located within the width coverage range of the finished loose roll. A reflecting diode is correspondingly installed in at least one diode mounting hole on the stripping support plate and the mounting bracket.

5. The loose-roll plastic bag labeling device according to claim 4, characterized in that: When there are two diode mounting holes on the stripping support plate and the mounting bracket respectively, and only one diode mounting hole is used to install the through-beam diode, the receiver and transmitter of the through-beam diode are respectively installed in the two diode mounting holes on the same side of the stripping support plate and the mounting bracket along the width direction of the finished product unwind; Alternatively, when two diode mounting holes are respectively provided on the stripping support plate and the mounting bracket, and both diode mounting holes are used to install the through-beam diode and only one through-beam diode is working, the receiver and transmitter of the working through-beam diode are respectively installed in the two diode mounting holes on the same side of the stripping support plate and the mounting bracket along the width direction of the finished product unwind.

6. The roll-type plastic bag labeling device according to claim 5, characterized in that: A labeling brush is fixedly connected below the label peeling end of the peeling support plate.

7. The loose-roll plastic bag labeling device according to claim 6, characterized in that: One end of the stripping support plate opposite to the labeling brush is fixedly connected to a connecting shaft, one end of the connecting shaft is fixedly connected to one end of the adapter, and the other end of the adapter is rotatably connected to the piston rod end of the labeling cylinder, and the labeling cylinder is installed at an angle.

8. The loose-roll plastic bag labeling device according to claim 2 or 3, characterized in that: The inclined air outlet structure and the mounting bracket are arranged in sequence from front to back along the moving direction of the label to be attached.

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