Unrolling mechanism of bag making machine

Abstract

The utility model discloses an unwinding mechanism of a bag making machine, and belongs to the technical field of bag making machines, the unwinding mechanism comprises a rack, an unwinding assembly and a tensioning assembly, the unwinding assembly comprises an unwinding roller rotatably installed on the rack and a first driving assembly used for driving the unwinding roller to rotate, the surface of the unwinding roller is slidably connected with two symmetrical limiting blocks, and the tensioning assembly is arranged on the rack. A two-way screw rod is rotationally installed in the unwinding roller, the two limiting blocks are connected to the two ends of the two-way screw rod in a sleeving mode correspondingly and are in threaded connection with the two-way screw rod, and the tensioning assembly comprises two supporting rollers rotationally installed on the rack and a tensioning roller arranged between the two supporting rollers. Supporting blocks are rotationally mounted at the two ends of the tensioning roller; and through the arrangement of the limiting blocks, the two-way screw rods, the rotary knobs and the strip-shaped holes, the limiting blocks can be adjusted according to the width of the cylindrical prefabricated film only by rotating the rotary knobs, operation is convenient and fast, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of bag making machine, concretely relates to a rewinding mechanism of bag making machine. BACKGROUND

[0002] The bag making machine is a machine for making various plastic packaging bags or packaging bags made of other materials. Its processing range includes packaging bags made of various sizes, thicknesses, and specifications of plastic or other materials. Generally, plastic packaging bags are the main products. The existing packaging bag preparation is prepared by using a preformed film. The cylindrical preformed film is set up on the rewinding mechanism and is transported, opened, bottomed, cut, filled, and sealed to complete the preparation of the packaging bag. The rewinding mechanism of the existing bag making machine is mainly composed of a rack, a rewinding roller, and a tensioning roller. The cylindrical preformed film is simply set up for rotation to achieve transmission.

[0003] The existing Chinese patent with publication number CN210161678U discloses a rewinding mechanism of a bag making machine, which includes a rack, a rewinding roller rotatably connected to the front side of the rack, multiple tensioning rollers rotatably connected to the discharge side of the rack, and a driving device for driving the rewinding roller. A speed sensor is provided above the tensioning rollers to detect the transmission speed of the preformed film and send a rotational speed signal. The speed sensor is connected to a controller, which controls the driving speed of the driving device according to the rotational speed signal.

[0004] In view of the above-mentioned related technology, the inventors found that at least the following problems exist in the technology: In the above-mentioned technology, a limiting block is used to limit the cylindrical preformed film to prevent it from shifting horizontally during production. However, when adjusting the limiting block, two limiting bolts need to be loosened and tightened separately, which is relatively cumbersome and affects work efficiency. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a rewinding mechanism of a bag making machine to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a rewinding mechanism of a bag making machine, which includes a rack, a rewinding assembly, and a tensioning assembly. The rewinding assembly includes a rewinding roller rotatably installed on the rack and a first driving assembly for driving the rewinding roller to rotate. The surface of the rewinding roller is slidably connected to two symmetrical limiting blocks. A bidirectional screw is rotatably installed inside the rewinding roller. The two limiting blocks are respectively sleeved on the two ends of the bidirectional screw and are threadedly connected to the bidirectional screw.

[0007] The tensioning assembly comprises two supporting rollers rotatably mounted on the frame and a tensioning roller arranged between the two supporting rollers, both ends of the tensioning roller are rotatably provided with supporting blocks, both sides of the frame are provided with grooves, vertical screws are rotatably arranged in the grooves, the supporting blocks are sleeved on the vertical screws and are threadedly connected with the vertical screws, and the frame is provided with a second driving assembly for driving the two vertical screws to rotate.

[0008] As a preferred embodiment, the first driving assembly comprises a housing fixedly mounted on one side of the frame, a first motor fixedly mounted on the housing, a main gear fixedly connected to an output end of the first motor, and a slave gear fixedly mounted on one end of the unwinding roller and engaged with the main gear.

[0009] As a preferred embodiment, one end of the bidirectional screw is fixedly connected with a knob.

[0010] As a preferred embodiment, the surface of the unwinding roller is provided with a strip-shaped hole arranged along the length direction of the unwinding roller, and the limiting block is slidably penetrated through the strip-shaped hole.

[0011] As a preferred embodiment, the second driving assembly comprises a second motor fixedly mounted on the frame, an output end of the second motor fixedly connected with the upper end of one of the vertical screws, a synchronous wheel fixedly connected with the lower end of the vertical screw, and two synchronous wheels linked through a synchronous belt.

[0012] As a preferred embodiment, a guide rod parallel to the vertical screw is fixedly mounted in the groove, and the supporting block is slidably sleeved on the guide rod.

[0013] Compared with the prior art, the utility model has the advantages of:

[0014] The unwinding mechanism of the bag making machine can limit the cylindrical preformed film by the limiting block, avoid the transverse deviation of the cylindrical preformed film in the production process, and adjust the limiting block according to the width of the cylindrical preformed film by rotating the knob to drive the bidirectional screw to rotate and drive the two limiting blocks to slide along the strip-shaped hole in opposite directions, so that the operation is convenient and the work efficiency is improved.

[0015] The unwinding mechanism of the bag making machine can limit the cylindrical preformed film by the limiting block, avoid the transverse deviation of the cylindrical preformed film in the production process, and adjust the limiting block according to the width of the cylindrical preformed film by rotating the knob to drive the bidirectional screw to rotate and drive the two limiting blocks to slide along the strip-shaped hole in opposite directions, so that the operation is convenient and the work efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the whole structure schematic view of the utility model;

[0017] Figure 2 It is the structure schematic view of the utility model's unwinding roller;

[0018] Figure 3 It is the internal structure schematic view of the utility model's unwinding roller.

[0019] In the drawing: 1, rack; 2, unwinding assembly; 21, unwinding roller; 22, first drive assembly; 221, first motor; 222, main gear; 223, from gear; 23, limit block; 24, bidirectional screw; 25, knob; 26, strip hole; 3, tensioning assembly; 31, support roller; 32, tensioning roller; 33, support block; 34, recess; 35, vertical screw; 36, second drive assembly; 361, second motor; 362, synchronous wheel; 363, synchronous belt; 37, guide rod. DETAILED DESCRIPTION

[0020] The utility model will be further described in connection with examples.

[0021] The following examples are used to illustrate the utility model, but cannot be used to limit the protection scope of the utility model. The conditions in the examples can be further adjusted according to specific conditions, and the simple improvement of the method of the utility model under the concept of the utility model belongs to the range of the utility model.

[0022] Please refer to Figures 1-3 The utility model provides a kind of unwinding mechanism of bag making machine, including rack 1, unwinding assembly 2 and tensioning assembly 3, unwinding assembly 2 includes the unwinding roller 21 of rotation installation in rack 1 and the first drive assembly 22 for driving unwinding roller 21 rotation, first drive assembly 22 includes the housing of fixed installation in one side of rack 1, housing is fixedly installed with first motor 221, the output end of first motor 221 is fixedly connected with main gear 222, one end of unwinding roller 21 is fixedly installed with from gear 223 meshing with main gear 222, by the setting of unwinding assembly 2, can start first motor 221 drive main gear 222 rotation, by main gear 222 drive from gear 223 rotation, make from gear 223 drive unwinding roller 21 rotation, make unwinding roller 21 to the surface tubular preformed film for conveying.

[0023] Refer to Figure 2 And Figure 3The surface of the unwinding roller 21 is slidably connected with two symmetrical limiting blocks 23, a bidirectional screw 24 is rotatably installed in the unwinding roller 21, the two limiting blocks 23 are respectively sleeved on the two ends of the bidirectional screw 24 and are threadedly connected with the bidirectional screw 24, one end of the bidirectional screw 24 is fixedly connected with a knob 25, and a strip-shaped hole 26 is arranged on the surface of the unwinding roller 21 along the length direction of the unwinding roller 21, and the limiting block 23 slidably penetrates through the strip-shaped hole 26. Through the arrangement of the limiting block 23, the bidirectional screw 24, the knob 25 and the strip-shaped hole 26, the limiting block 23 can be used to limit the cylindrical prefabricated film, so that the lateral deviation of the cylindrical prefabricated film in the production process is avoided. When it is necessary to adjust the limiting block 23, the knob 25 is only rotated to drive the bidirectional screw 24 to rotate, the two limiting blocks 23 are driven by the bidirectional screw 24 to slide along the strip-shaped hole 26 in opposite directions or opposite directions, and the limiting block 23 can be adjusted according to the width of the cylindrical prefabricated film. The operation is convenient, and the working efficiency is improved.

[0024] With reference to Figure 1 The tensioning assembly 3 comprises two supporting rollers 31 rotatably installed on the rack 1 and a tensioning roller 32 arranged between the two supporting rollers 31. The two ends of the tensioning roller 32 are rotatably installed with supporting blocks 33. The two sides of the rack 1 are provided with grooves 34, and vertical screws 35 are rotatably installed in the grooves 34. The supporting blocks 33 are sleeved on the vertical screws 35 and are threadedly connected with the vertical screws 35. A second driving assembly 36 is arranged on the rack 1 for driving the two vertical screws 35 to rotate. Guide rods 37 parallel to the vertical screws 35 are fixedly installed in the grooves 34. The supporting blocks 33 are slidably sleeved on the guide rods 37. Through the arrangement of the tensioning assembly 3, the prefabricated film passes between the supporting rollers 31 and the tensioning roller 32 and is then conveyed to the bag making machine. When the tension of the prefabricated film is adjusted, the second driving assembly 36 is started to drive the vertical screws 35 to rotate, so that the vertical screws 35 drive the supporting blocks 33 to vertically slide in the grooves 34 along the guide rods 37, and the supporting blocks 33 drive the tensioning roller 32 to ascend and descend, so that the distance between the supporting rollers 31 and the tensioning roller 32 is adjusted, and the tension of the prefabricated film is adjusted, avoiding the tearing of the prefabricated film during unwinding.

[0025] Specifically, the second driving assembly 36 comprises a second motor 361 fixedly installed on the rack 1. The output end of the second motor 361 is fixedly connected with the upper end of one of the vertical screws 35. The lower end of the vertical screw 35 is fixedly connected with a synchronous wheel 362. The two synchronous wheels 362 are connected through a synchronous belt 363.

[0026] The working principle and use process of the utility model: firstly, the first motor 221 can be started to drive the main gear 222 to rotate, the slave gear 223 is driven to rotate through the main gear 222, the slave gear 223 drives the unwinding roller 21 to rotate, the unwinding roller 21 transports the surface tubular prefabricated film, the prefabricated film passes through the middle of support roller 31 and tensioning roller 32, then is transported to the bag making machine, the limiting block 23 can be used to limit the tubular prefabricated film, avoids the lateral deviation of tubular prefabricated film in the production process, when needing to adjust the limiting block 23, only need to rotate knob 25, make knob 25 drive two-way screw rod 24 to rotate, the two limiting blocks 23 are driven to slide along the bar-shaped hole 26 relatively or oppositely through two-way screw rod 24, according to the width of tubular prefabricated film, the limiting block 23 can be adjusted, when adjusting the tension of prefabricated film, the second drive assembly 36 can be started to drive the vertical screw rod 35 to rotate, the vertical screw rod 35 drives support block 33 to slide vertically in the recess 34 along guide rod 37, support block 33 drives tensioning roller 32 to lift, the interval of support roller 31 and tensioning roller 32 is adjusted, the tension of prefabricated film is adjusted, avoids the tearing of prefabricated film in the unwinding process.

[0027] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A bag making machine unwinding mechanism comprising a frame (1), an unwinding assembly (2) and a tensioning assembly (3), characterized in that: The unwinding assembly (2) comprises an unwinding roller (21) rotatably installed on the frame (1) and a first driving assembly (22) for driving the unwinding roller (21) to rotate, the surface of the unwinding roller (21) is slidably connected with two symmetrical limiting blocks (23), and the inside of the unwinding roller (21) is rotatably installed with a bidirectional screw rod (24), the two limiting blocks (23) are respectively sleeved on the two ends of the bidirectional screw rod (24) and are threadedly connected with the bidirectional screw rod (24); The tensioning assembly (3) comprises two supporting rollers (31) rotatably installed on the frame (1) and a tensioning roller (32) arranged between the two supporting rollers (31), the two ends of the tensioning roller (32) are rotatably installed with supporting blocks (33), the two sides of the frame (1) are both provided with grooves (34), the grooves (34) are rotatably installed with vertical screw rods (35), the supporting blocks (33) are sleeved on the vertical screw rods (35) and are threadedly connected with the vertical screw rods (35), and the frame (1) is provided with a second driving assembly (36) for driving the two vertical screw rods (35) to rotate.

2. A roll withdrawal mechanism for a bag making machine according to claim 1, characterized in that: The first driving assembly (22) comprises a housing fixedly installed on one side of the frame (1), a first motor (221) fixedly installed on the housing, a main gear (222) fixedly connected to the output end of the first motor (221), and a slave gear (223) fixedly installed at one end of the unwinding roller (21) and engaged with the main gear (222).

3. A roll withdrawal mechanism for a bag making machine as claimed in claim 1, wherein: One end of the bidirectional screw rod (24) is fixedly connected with a knob (25).

4. A roll withdrawal mechanism for a bag making machine according to claim 1, characterized in that: The surface of the unwinding roller (21) is provided with a strip-shaped hole (26) arranged along the length direction of the unwinding roller (21), and the limiting block (23) slidably penetrates through the strip-shaped hole (26).

5. A roll withdrawal mechanism for a bag making machine as claimed in claim 1, wherein: The second driving assembly (36) comprises a second motor (361) fixedly installed on the frame (1), the output end of the second motor (361) is fixedly connected with the upper end of one of the vertical screw rods (35), the lower end of the vertical screw rod (35) is fixedly connected with a synchronous wheel (362), and the two synchronous wheels (362) are linked through a synchronous belt (363).

6. A roll withdrawal mechanism for a bag making machine according to claim 1, characterized in that: The groove (34) is fixedly installed with a guide rod (37) parallel to the vertical screw rod (35), and the supporting block (33) is slidably sleeved on the guide rod (37).

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