Plastic bag handle folding and pressing mechanism and folding machine

Abstract

The utility model belongs to the field of plastic bag processing equipment, and discloses a plastic bag handle folding and pressing mechanism and a folding machine. The plastic bag handle folding and pressing mechanism comprises a stroke mechanism, the stroke mechanism comprises a main body part and further comprises a sliding part which is connected to the main body part in a sliding mode and reciprocates relative to the main body part in the height direction, and a pressing part used for pressing a plastic bag is formed at the end, away from the main body part, of the sliding part. A plastic bag handle folding and pressing mechanism is fixedly arranged on the folding machine. According to the plastic bag handle folding and pressing mechanism, the handle cannot be completely folded into the main body part of a plastic bag, the adaptability is high, the mechanism is suitable for pressing the plastic bag on a folding machine in the handle folding process, bundles of plastic bags folded by the folding machine are smooth, attractive and not prone to scattering, and the mechanism is suitable for processing and folding the plastic bags.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of plastic bag processing equipment, and particularly relates to a plastic bag handle folding and pressing mechanism and a folding machine. BACKGROUND

[0002] Hand-held plastic bags, also known as vest plastic bags, are usually folded and bundled in stacks for convenient storage, transportation and sales at the end of bag making. Figure 1 As shown in the figure, when folding the plastic bag, the two handles need to be folded along the dashed line in the direction of the arrow first to make it roughly rectangular, and then the waist of the plastic bag is folded to make the two handles fold inside, and then a third or even a fourth folding is performed.

[0003] A Chinese utility model patent with the authorization announcement number CN214524909U discloses a plastic packaging bag handle folding device, which comprises a placing plate matched with the shape of the plastic bag after handle folding and a handle folding plate.

[0004] The above folding device has good folding effect on plastic bags with thin overall thickness after stacking, but for plastic bags with thick overall thickness after stacking due to the thickness of individual plastic bags or the number of plastic bags per stack, the overall thickness is relatively thick, and the hardness is also relatively high, so when the handles are folded, the part of the plastic bag body close to the handle will be raised due to the folding of the handle, which will result in incomplete folding of the handles of the thick stacked plastic bags, and finally the handles cannot be completely folded into the plastic bag body, which will result in poor final folding effect and poor appearance of the final bundled plastic bags. UTILITY MODEL CONTENTS

[0005] To solve the above problems in the prior art, the utility model aims to provide a plastic bag handle folding and pressing mechanism and a folding machine to achieve the purpose of fully folding the handles of plastic bags with thick overall thickness after stacking, and to make the final bundled plastic bags not easy to scatter and have better appearance.

[0006] To achieve the above purpose, the utility model employs the following technical solutions: a plastic bag handle folding and pressing mechanism, comprising a stroke mechanism, the stroke mechanism comprising a main body part, further comprising a sliding part connected to the main body part and reciprocating along the height direction relative to the main body part, and the end of the sliding part away from the main body part forms a pressing part for pressing the plastic bag.

[0007] As a limitation of the utility model: the pressing part is fixedly arranged at one end of the sliding part away from the main body part, the pressing part comprises a sliding block fixedly arranged at the bottom end of the sliding part, a buffer assembly elastically connected to the sliding block in the height direction, and further comprises a pressing assembly fixedly arranged at one end of the buffer assembly away from the sliding block.

[0008] As a limitation of the utility model: the sliding block is fixedly provided with a plurality of buffer guide rods in the height direction at one end away from the main body part, the buffer assembly comprises a buffer plate slidably connected to the buffer guide rods, a compression spring is sleeved on the buffer guide rods between the sliding block and the buffer plate, and the pressing assembly is fixedly arranged on the buffer plate and extends away from the compression spring.

[0009] As a limitation of the utility model: the pressing assembly comprises a pressing rod fixedly arranged on the buffer plate in the height direction.

[0010] As a limitation of the utility model: a long circular hole is formed in the buffer plate in the width direction, and the pressing rod is detachably arranged on the buffer plate and extends away from the compression spring.

[0011] As a limitation of the utility model: the pressing rod is provided with two in the width direction of the buffer plate.

[0012] As a limitation of the utility model: the stroke mechanism is a cylinder, the main body part is a cylinder body, and the sliding part is a piston rod.

[0013] As a limitation of the utility model: the cylinder is a guide cylinder with a guide rail.

[0014] The utility model further discloses a folding machine, which comprises a rack, a handle folding mechanism is arranged on the rack, the rack comprises a cross beam fixedly arranged above the handle folding mechanism, the cross beam is fixedly provided with the plastic bag handle folding and pressing mechanism, the pressing part of the plastic bag handle folding and pressing mechanism is located above the placement plate of the handle folding mechanism and is close to the position corresponding to the handle folding part.

[0015] As a limitation of the utility model: when the handle folding mechanism is actuated, the sliding part is located at the lower limit position, the distance between the lower end of the pressing part and the placement plate is smaller than the thickness of the plastic bags to be folded, so that the lower end of the pressing part abuts against the plastic bags to be folded.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] The pressing part of the utility model can press the position of the plastic bag stack close to the handle when the handle folding mechanism is in action, can effectively avoid the upwarping of the part of the relatively thick plastic bag stack close to the handle in the handle folding process, makes the handle folding of the relatively thick plastic bag stack more thorough, and further makes the final plastic bag bundle not easy to scatter and more beautiful in appearance; further, the pressing part of the utility model comprises a buffer assembly, can be suitable for plastic bag stacks of different thicknesses, and the pressing rod is adjustably arranged in the long circular hole, can be suitable for plastic bag stacks of different sizes, and is strong in adaptability.

[0018] In conclusion, the plastic bag handle folding and pressing mechanism of the utility model can make the handle unable to be completely folded into the plastic bag main body part, is strong in adaptability, is suitable for pressing the plastic bag in the handle folding process on the folding machine, the plastic bag bundle folded out by the folding machine of the utility model is flat, beautiful and not easy to scatter, and is suitable for the processing and folding of plastic bags. BRIEF DESCRIPTION OF DRAWINGS

[0019] The utility model will be explained in further detail below in combination with the drawings and specific embodiments.

[0020] Figure 1 It is the folding schematic view of plastic bag in the background art of the utility model;

[0021] Figure 2 It is the perspective view of the sliding part of embodiment 1 of the utility model in the upper limit position;

[0022] Figure 3 It is the perspective view of the sliding part of embodiment 1 of the utility model in the lower limit position;

[0023] Figure 4 It is the perspective view of the sliding part of embodiment 2 of the utility model in the upper limit position;

[0024] Figure 5 It is the perspective view of the sliding part of embodiment 2 of the utility model in the lower limit position.

[0025] In the drawing: 1-cylinder body, 2-piston rod, 3-sliding block, 4-buffer guide rod, 5-buffer plate, 6-compression spring, 7-pressing rod, 8-long circular hole, 9-rack, 10-placing plate, 11-handle folding plate, 12-crossbeam. DETAILED DESCRIPTION

[0026] The preferred embodiments of the utility model will be explained below in combination with the drawings. It should be understood that the plastic bag handle folding and pressing mechanism and folding machine described here are preferred embodiments, which are only used for explaining and interpreting the utility model and do not constitute the limitation of the utility model.

[0027] The directional terms or positional relationships used in this utility model, such as "up," "down," "left," and "right," are based on the positional relationships in the accompanying drawings of this utility model. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component must have a specific orientation, or that it must be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the content protected by this utility model.

[0028] Example 1

[0029] This implementation example Figure 2 , Figure 3 As shown, a plastic bag handle folding and pressing mechanism includes a travel mechanism. The travel mechanism includes a main body and a sliding part that is slidably connected to the main body and reciprocates relative to the main body in the height direction. The end of the sliding part away from the main body forms a pressing part for pressing the plastic bag.

[0030] Specifically, in this embodiment, the stroke mechanism is a guide cylinder with a guide rail, the main body of which is the cylinder body 1, and the sliding part is the piston rod 2. In other embodiments, the stroke mechanism can also be other cylinders, or electric telescopic rods or other mechanisms capable of reciprocating motion.

[0031] The compression part is fixed to the end of the piston rod 2 away from the cylinder 1, which includes a sliding block 3 fixed to the bottom end of the piston rod 2, a buffer assembly elastically connected to the sliding block 3 in the height direction, and a compression assembly fixed to the end of the buffer assembly away from the sliding block 3. Specifically, the sliding block 3 is a long rectangular thin block, the size of which is matched with the size of the cylinder 1, and four buffer guide rods 4 in the height direction are fixed to the four corners of the sliding block 3 away from the cylinder 1. The buffer assembly includes a buffer plate 5 slidingly connected to the buffer guide rods 4, and four through holes are formed in the buffer plate 5 to allow the buffer guide rods 4 to pass through. A compression spring 6 is sleeved on the buffer guide rods 4 between the sliding block 3 and the buffer plate 5. The compression assembly is fixed to the buffer plate 5 and extends away from the compression spring 6. In this way, when the compression assembly compresses the plastic bag, the buffer assembly can buffer, so that the embodiment can be applied to the compression of plastic bags with different thicknesses. The buffer assembly can also be other structures with buffering function, such as a rubber buffer block with a certain elasticity arranged between the sliding block 3 and the buffer plate 5. The compression assembly includes a compression rod 7 fixed to the buffer plate 5 in the height direction. In the embodiment, the compression rod 7 is provided with two compression rods 7, and the number of the compression rod 7 can be adjusted as needed. Further, the cross-sectional area of the buffer plate 5 is larger than that of the sliding block 3, and the width of the buffer plate 5 is significantly larger than that of the sliding block 3, so that a long circular hole 8 is formed in the buffer plate 5 in the width direction. The compression rod 7 is detachably fixed to the buffer plate 5 and extends away from the compression spring 6 through a threaded connecting piece. In this way, the position of the compression rod 7 in the long circular hole 8 can be adjusted through the threaded connecting piece, and the distance between the two compression rods 7 is adjusted, so that the embodiment can be applied to the compression of plastic bags with different sizes. In the embodiment, the buffer plate 5 is trapezoidal, and the long circular hole 8 is formed in the long side of the trapezoid and located on the outside of the compression spring 6. In other embodiments, the position of the long circular hole 8 can be adjusted as needed.

[0032] As shown in Figure 2 , when the cylinder piston is contracted, the compression rod 7 is located at the upper limit position, as shown in Figure 3 , when the cylinder piston rod 2 is completely pushed out, the compression rod 7 is located at the lower limit position.

[0033] Embodiment 2

[0034] The embodiment can be Figure 4 , Figure 5As shown, it is a folding machine, comprising a frame 9, the frame 9 is provided with a handle folding mechanism, the handle folding mechanism comprises a placing plate 10, a handle folding plate 11, the end of the placing plate 10 is processed into a bevel to adapt to the folding of the plastic bag handle, the plastic bag is placed on the placing plate 10, the handle folding plate 11 is driven to act by a driving device, the two handles of the plastic bag are respectively folded inward, and the folding of the handle is completed. The frame 9 is also provided with a bag cutting mechanism, a bag folding mechanism, a bundling mechanism and other parts, the structure of the handle folding mechanism and other mechanisms is the prior art, and details are not repeated here.

[0035] The frame 9 comprises a cross beam 12 fixed above the handle folding mechanism, the plastic bag handle folding and pressing mechanism in embodiment 1 is fixed on the cross beam 12 through a fixed plate, in the embodiment, the bag cutting mechanism, the bag folding mechanism and other mechanisms are arranged side by side in the width direction, and the corresponding plastic bag handle folding and pressing mechanism is also arranged in two. The pressing part of the plastic bag handle folding and pressing mechanism is located above the placing plate 10 of the handle folding mechanism and is close to the position corresponding to the handle folding part. Figure 4 As shown, when the other mechanisms act, the piston rod 2 is located at the upper limit position, as shown in the figure. Figure 5 As shown, when the handle folding mechanism acts, the piston rod 2 moves to the lower limit position, at this time, the distance between the lower end of the pressing rod 7 and the placing plate 10 is less than the thickness of the plastic bag stack to be folded, so that the lower end of the pressing rod 7 abuts against the plastic bag stack to be folded.

Claims

1. A plastic bag handle folding and compacting mechanism, characterized by: The stroke mechanism comprises a main body part and a sliding part connected to the main body part and reciprocating along the height direction relative to the main body part, and a pressing part is formed at the end of the sliding part away from the main body part for pressing the plastic bag.

2. The plastic bag handle folding and compacting mechanism of claim 1, wherein: The pressing part is fixed at the end of the sliding part away from the main body part, and comprises a sliding block fixed at the bottom end of the sliding part, a buffer assembly elastically connected to the sliding block along the height direction, and a pressing assembly fixed at the end of the buffer assembly away from the sliding block.

3. The plastic bag handle folding and compacting mechanism of claim 2, wherein: A plurality of buffer guide rods along the height direction are fixed at the end of the sliding block away from the main body part, the buffer assembly comprises a buffer plate connected to the buffer guide rods, a compression spring is sleeved on the buffer guide rods between the sliding block and the buffer plate, and the pressing assembly is fixed on the buffer plate and extends away from the compression spring.

4. The plastic bag handle folding and compacting mechanism of claim 3, wherein: The pressing assembly comprises a pressing rod fixed on the buffer plate along the height direction.

5. The plastic bag handle folding and compacting mechanism of claim 4, wherein: A long circular hole along the width direction is formed on the buffer plate, and the pressing rod is detachably fixed on the buffer plate and extends away from the compression spring.

6. The plastic bag handle folding and compacting mechanism of claim 5, wherein: The pressing rod is provided with two along the width direction of the buffer plate.

7. The mechanism according to any one of claims 1 to 6, wherein: The stroke mechanism is a cylinder, the main body part is a cylinder body, and the sliding part is a piston rod.

8. The plastic bag handle folding and compacting mechanism of claim 7, wherein: The cylinder is a guide cylinder with a guide rail.

9. A folding machine comprising a frame, on which a handle folding mechanism is arranged, characterized in that: The rack comprises a cross beam fixed above the handle folding mechanism, the cross beam is fixed with the plastic bag handle folding and pressing mechanism as claimed in any one of claims 1-8, the pressing part of the plastic bag handle folding and pressing mechanism is above the placement plate of the handle folding mechanism and close to the position corresponding to the handle folding part.

10. The folding machine of claim 9, wherein: When the handle folding mechanism is in action, the sliding part is at the lower limit position, the distance between the lower end of the pressing part and the placement plate is less than the thickness of the plastic bag stack to be folded, so that the lower end of the pressing part abuts against the plastic bag stack to be folded.

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