A corner straightening and cutting mechanism and a packaging machine

Abstract

The utility model relates to a kind of angle straightening and cutting mechanism and packaging machine, the angle straightening and cutting mechanism includes abutting plate, scraper assembly and cutting angle component, the abutting plate is located at the opposite sides of packaging box, for clamping and fixing packaging box, the scraper assembly is located at the four corners of packaging box, for relative packaging box rotates between angle straightening position and avoiding position;Wherein, the scraper assembly is located at angle straightening position, and the edge of packaging bag is straightened, and the edge of packaging bag is clamped with the abutting plate cooperation, and the edge is applied along straightening direction's pulling force;The scraper assembly is located at avoiding position, and the edge of packaging bag is separated;The cutting angle component is used to heat cut and seal the edge of packaging bag straightened. The angle straightening and cutting mechanism and packaging machine merge the process of angle straightening and cutting, while also applying tension to the edge, ensuring the effectiveness of the cutting angle, and without additional setting angle pulling mechanism.

Description

Technical Field

[0001] This utility model belongs to the technical field of product packaging equipment, and in particular relates to a corner trimming and cutting mechanism and a packaging machine. Background Technology

[0002] In the field of product packaging processing, to achieve a neat and aesthetically pleasing appearance of the transparent outer packaging film, the edges and corners of the packaging film need to be trimmed and cut. Currently, various trimming and cutting mechanisms have emerged to replace manual operations.

[0003] For example, the corner straightening and cutting mechanism disclosed in CN103662207A uses a roller mechanism, a smooth rod mechanism, or a smooth module mechanism. It straightens the corners at both ends of the packaging bag by moving along a smooth plane, and then the bottom blade of the corner cutting mechanism, in conjunction with a hot cutting blade, cuts off the straightened corners. To solve the problem of residual corners after corner straightening and cutting, this mechanism also requires an additional corner pulling mechanism. This mechanism clamps the cut corners and pulls them down, thus removing the hot-cut corners. In other words, the corner pulling action relies on a dedicated, independent mechanism, increasing the complexity of the mechanism. However, in this solution, the corner straightening mechanism only straightens the corners without applying tension to the film corners during the straightening process. Instead, after straightening, a robotic arm clamps and applies tension to achieve the corner pulling process.

[0004] Thus, the corner straightening and tightening actions are not synchronized, resulting in limited tightening of the film corners during corner straightening. This can easily lead to looseness or misalignment of the corners, causing problems such as burrs or misaligned bonding lines, and making it difficult to avoid unstable corner cutting quality. Furthermore, this corner pulling process requires a structure independent of the corner straightening mechanism, increasing processing costs. Utility Model Content

[0005] In view of this, the present invention provides a corner trimming and cutting mechanism and a packaging machine to solve the problem of corner trimming and cutting of the transparent packaging film on the outside of the packaging box.

[0006] To achieve the above objectives, in a first aspect, the technical solution of this utility model to solve the technical problem is to provide a corner straightening and cutting mechanism, comprising: a backing plate, a scraper assembly, and a corner cutting assembly. The backing plate is located on opposite sides of a packaging box and is used to clamp and fix the packaging box. An adsorption hole is provided on the side of the backing plate near the scraper assembly, and the adsorption hole is connected to an external air source. The scraper assembly is located at the four corners of the packaging box and is used to rotate relative to the packaging box between a corner straightening position and a clearance position. When the scraper assembly is in the corner straightening position, it straightens the corners of the packaging bag and cooperates with the backing plate to clamp the corners of the packaging bag and apply a pulling force along the straightening direction to the corners. When the scraper assembly is in the clearance position, it separates from the corners of the packaging bag. The corner cutting assembly is used to heat-cut and seal the straightened corners of the packaging bag.

[0007] In one specific embodiment, the scraper assembly includes a scraper, a scraper bracket, and a scraper drive. The scraper is rotatably connected to the scraper bracket, and the scraper drive is used to drive the scraper to rotate between the corner position and the avoidance position.

[0008] In one specific embodiment, the scraper includes a connecting part and a corner-removing part. The connecting part is rotatably connected to the scraper bracket. The scraper driving member is used to drive the connecting part to rotate relative to the scraper bracket. The corner-removing part is rotatably connected to the end of the connecting part away from the scraper bracket, and an elastic member is provided between the corner-removing part and the connecting part.

[0009] In one specific embodiment, the scraper bracket is provided with a rotating hole, the connecting part is rotatably engaged with the rotating hole, the scraper drive component includes a scraper cylinder and a push rod, the connecting part is provided with an extension part extending along a direction perpendicular to the axis of the rotating hole, the scraper cylinder is connected to the scraper bracket, one end of the push rod is connected to the output end of the scraper cylinder, and the end away from the scraper cylinder is connected to the extension part.

[0010] In one specific embodiment, the corner cutting assembly includes a cutter, a cutter support, and a cutter drive. The cutter drive is connected to the cutter support, and the cutter is connected to the cutter drive. The cutter drive is used to drive the cutter to heat-cut and seal the straightened corners of the packaging bag.

[0011] In one specific embodiment, the corner trimming and chopping mechanism further includes a base and four mounting seats. All four mounting seats are slidably connected to the base, and the abutment plate, the scraper assembly, and the corner trimming assembly are all connected to the mounting seats.

[0012] In one specific embodiment, the base includes a first base plate and a second base plate. There are two second base plates, and both second base plates are slidably connected to the first base plate along a first direction. The four mounting seats are divided into two groups, with two mounting seats in each group. The two groups of mounting seats are respectively arranged on opposite sides of the second base plate along a second direction. In this case, one or two mounting seats in each group are slidably connected to the second base plate.

[0013] In one specific embodiment, the base further includes a first driving member and a second driving member; two first guide rails are provided on the first base plate along the first direction, and a first slider is provided on each of the two second base plates, with the two first guide rails slidably engaging with the first sliders on the two second base plates respectively; the first driving member includes a first driving motor, a first driving wheel, a first driven wheel, and a first synchronous belt, the output end of the first driving motor being drively connected to the first driving wheel, the first synchronous belt being sleeved on the first driving wheel and the first driven wheel to form a belt drive, and a first connecting block being provided on each of the two second base plates respectively, with the first connecting block being connected to the first driving wheel and the first driven wheel respectively. The first synchronous belt is connected to its opposite sides; a second guide rail is provided on the side of the second base plate away from the first base plate, and a second slider is provided on one or two of the mounting seats in each group, the second slider slidingly engaging with the second guide rail along the second direction; the second driving component includes a second driving motor, a second driving wheel, a second driven wheel and a second synchronous belt, the output end of the second driving motor is drivingly connected to the second driving wheel, the second synchronous belt is sleeved on the second driving wheel and the second driven wheel to form a belt drive, and a second connecting block is provided on one or two of the mounting seats in each group, the second connecting block being connected to the second synchronous belt.

[0014] In one specific embodiment, a silicone pad is provided on the side of the abutment near the scraper assembly, and the scraper assembly abuts against the silicone pad when it is located at the corner position.

[0015] Secondly, this utility model provides a packaging machine, including the corner trimming and cutting mechanism, the feeding mechanism, and the picking mechanism. The feeding mechanism is used to put the packaging box into the corner trimming and cutting mechanism, the corner trimming and cutting mechanism is used to straighten the corners of the packaging bag on the packaging box and heat-seal it, and the picking mechanism is used to remove the packaging box after the corners are cut.

[0016] Compared with the prior art, the corner straightening and cutting mechanism and packaging machine provided by this utility model have the following beneficial effects: the corners of the packaging bag are straightened by rotating the scraper assembly, and after straightening, the corners are clamped by the abutment and a tension force is applied along the straightening direction, thereby combining the corner straightening and cutting processes. While straightening the corners, a tension force is also applied to the corners, which can ensure the effect of cutting the corners, and there is no need to set up an additional corner pulling mechanism. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a corner trimming and chamfering mechanism provided in the first embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram showing the positional relationship of the scraper assembly when it is rotated to the corner position; Figure 3 for Figure 1 A schematic diagram showing the positional relationship of the middle scraper assembly when it rotates to the avoidance position; Figure 4 for Figure 1 A schematic diagram of the exploded structure of the middle-seat plate; Figure 5 for Figure 1 Schematic diagram of the middle scraper assembly; Figure 6 for Figure 5 Schematic diagram of the middle scraper; Figure 7 for Figure 5 Schematic diagram of the middle scraper support; Figure 8 for Figure 5 Schematic diagram of the middle scraper drive component; Figure 9 for Figure 1 Schematic diagram of the center chamfer assembly; Figure 10 This is a structural diagram of the base and mounting bracket; Figure 11 for Figure 10 A schematic diagram of the exploded structure; Figure 12 A schematic diagram of a packaging machine provided for the third embodiment of this utility model; Explanation of reference numerals in the attached figures: 1. Support plate; 11. Silicone pad; 12. Adsorption groove; 13. Adsorption plate; 14. Slot; 2. Scraper assembly; 21. Scraper; 211. Connecting part; 212. Corner trimming part; 213. Extension part; 22. Scraper bracket; 221. Rotating hole; 23. Scraper drive component; 231. Scraper cylinder; 232. Push rod; 3. Corner cutting assembly; 31. Cutting blade; 32. Cutting blade bracket; 33. Cutting blade drive component; 4. Base; 41. First base plate; 411. First guide rail; 42. Second... 421. Base plate; 422. First slider; 423. First connecting block; 424. Second guide rail; 43. First driving component; 431. First drive motor; 432. First drive wheel; 433. First driven wheel; 434. First synchronous belt; 44. Second driving component; 441. Second drive motor; 442. Second drive wheel; 443. Second driven wheel; 444. Second synchronous belt; 5. Mounting base; 51. Second slider; 52. Second connecting block; 6. Feeding mechanism; 7. Unloading mechanism. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0019] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0020] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0021] like Figures 1-3 As shown, the first embodiment of this utility model provides a corner trimming and cutting mechanism for trimming and cutting the corners of the packaging bag (not shown) outside the packaging box N. It includes a backing plate 1, a scraper assembly 2 and a corner cutting assembly 3. The backing plate 1 is located on opposite sides of the packaging box N and is used to clamp and fix the packaging box N. The scraper assembly 2 is located at the four corners of the packaging box N and is used to rotate relative to the packaging box N between the corner trimming position and the avoidance position. When the scraper assembly 2 is in the corner straightening position, it straightens the corners of the packaging bag and works with the abutment plate 1 to clamp the corners of the packaging bag and apply a pulling force along the straightening direction to the corners; when the scraper assembly 2 is in the avoidance position, it separates from the corners of the packaging bag; the corner cutting assembly 3 is used to heat-cut and seal the straightened corners of the packaging bag.

[0022] Specifically, in the initial state, the scraper assembly 2 is in the avoidance position. The abutments 1 on both sides of the packaging box N cooperate to clamp and fix the packaging box N. Then, the scraper assembly 2 rotates to the corner straightening position. During the rotation of the scraper assembly 2, the four corners of the packaging bag fitted on the packaging box N are straightened. Furthermore, when the scraper assembly 2 rotates to the corner straightening position, the scraper assembly 2 abuts against the abutments 1, clamping the corners of the packaging bag while applying a pulling force along the straightening direction, thereby tightening the corners of the packaging bag to facilitate more accurate cutting of the corners by the subsequent corner cutting assembly 3.

[0023] In one embodiment, such as Figure 4 As shown, a silicone pad 11 is provided on the side of the abutment 1 near the scraper assembly 2. When the scraper assembly 2 is in the corner position, it abuts against the silicone pad 11.

[0024] It is understandable that by setting the silicone pad 11, the packaging bag and / or the scraper assembly 2 can be cushioned and protected when the scraper assembly 2 and the abutment 1 come into contact with and clamp the corner of the packaging bag, so as to avoid damage to the packaging bag and / or wear of the scraper assembly 2.

[0025] In this embodiment, a slot 14 is provided on the abutment plate 1. The shape of the slot 14 is adapted to the silicone pad 11, and the silicone pad 11 is snapped into the slot 14.

[0026] Furthermore, an adsorption hole is provided on the side of the abutment plate 1 near the scraper assembly 2, and the adsorption hole is connected to an external air source.

[0027] In one specific embodiment, the abutment plate 1 is also provided with an adsorption groove 12, which is connected to an external air source and has an opening on the side near the scraper assembly 2. An adsorption plate 13 is provided at the opening, which closes the opening. An adsorption hole is provided on the adsorption plate 13, penetrates the adsorption plate 13 and is connected to the adsorption groove 12, so as to generate negative pressure at the adsorption hole.

[0028] There can be multiple adsorption holes, all of which penetrate the adsorption plate 13 and are connected to the adsorption tank 12 through openings.

[0029] It is understandable that the negative pressure generated by the external air source creates an adsorption force on the corners of the packaging bag through the adsorption holes, so that the cut corners can be adsorbed and recycled after the corner cutting component 3 cuts off the corners of the packaging bag.

[0030] By adjusting the size of the adsorption holes, corner pieces can be directly adsorbed and recovered, or they can be first adsorbed and fixed onto the adsorption plate 13, and then removed from the adsorption plate 13 for recovery. If the adsorption hole diameter is large enough to directly suck in the cut-off corner pieces, a recovery gas path can be set up. After the corner pieces are cut off, they are directly sucked into the adsorption hole and then into the recovery gas path for recovery. If the adsorption hole diameter is small enough not to directly suck in the cut-off corner pieces, the corner pieces can first be adsorbed and fixed onto the adsorption plate 13 using negative pressure, and then removed from the adsorption plate 13 after the negative pressure is released for recovery.

[0031] It should be noted that after the adsorption plate 13 closes the opening of the adsorption groove 12, it is flush with the silicone pad 11 so as to facilitate adsorption of the corners through the adsorption holes.

[0032] In one embodiment, such as Figures 5-8As shown, the scraper assembly 2 includes a scraper 21, a scraper bracket 22, and a scraper drive 23. The scraper 21 is rotatably connected to the scraper bracket 22, and the scraper drive 23 is used to drive the scraper 21 to rotate between the corner position and the avoidance position.

[0033] It is understandable that the scraper bracket 22 is used to support the scraper 21. The scraper 21 and the scraper bracket 22 can be connected by any means, such as a shaft hole connection, as long as a rotational connection between the scraper 21 and the scraper bracket 22 is achieved. The scraper drive unit 23 can be any drive unit, as long as it can drive the scraper 21 to rotate on the scraper bracket 22 to achieve rotation between the angular position and the avoidance position.

[0034] Furthermore, the scraper 21 includes a connecting part 211 and a corner-cleaning part 212. The connecting part 211 is rotatably connected to the scraper bracket 22. The scraper drive member 23 is used to drive the connecting part 211 to rotate relative to the scraper bracket 22. The corner-cleaning part 212 is rotatably connected to the end of the connecting part 211 away from the scraper bracket 22, and an elastic member is provided between the corner-cleaning part 212 and the connecting part 211.

[0035] Understandably, when the scraper drive 23 drives the scraper 21 to rotate to the corner position, the corner part 212 abuts against the silicone pad 11 on the abutment plate 1. Under the action of the scraper drive 23 and the abutment plate 1, the corner part 212 and the connecting part 211 rotate relative to each other. At this time, the elastic element undergoes elastic deformation to apply elastic force to the corner part 212, and uses this elastic force to apply a tension force along the straight direction to the corner of the packaging bag.

[0036] By setting the corner-retaining part 212 and the connecting part 211 as a rotatable connection and providing an elastic member between them, buffer protection can be provided when the corner-retaining part 212 and the abutment plate 1 clamp the corner of the packaging bag and apply tension to the corner, so as to avoid damage to the packaging bag when rigid abutment is applied and tension is applied.

[0037] It should be noted that the rotational connection between the corner section 212 and the connecting section 211 can be achieved in any way. The elastic element can be any elastic element such as a torsion spring that can apply elastic force to the corner section 212 and the connecting section 211. As long as the elastic element undergoes elastic deformation and applies elastic force to the corner section 212 when the corner section 212 rotates relative to the connecting section 211.

[0038] Preferably, the corner section 212 and the connecting section 211 are rotatably connected by a hinge.

[0039] Furthermore, the scraper bracket 22 is provided with a rotating hole 221, and the connecting part 211 is rotatably engaged with the rotating hole 221. The scraper drive component 23 includes a scraper cylinder 231 and a push rod 232. An extension part 213 is provided on the connecting part 211 along the direction perpendicular to the axis of the rotating hole 221. The scraper cylinder 231 is connected to the scraper bracket 22. One end of the push rod 232 is connected to the output end of the scraper cylinder 231, and the end away from the scraper cylinder 231 is connected to the extension part 213.

[0040] It is understandable that when the scraper cylinder 231 is working, it can drive the push rod 232 to move back and forth along its axis. During the movement of the push rod 232, it pushes the extension 213, thereby driving the connecting part 211 to rotate relative to the rotating hole 221 through the extension 213. This, in turn, drives the corner-aligning part 212 to rotate between the corner-aligning position and the avoidance position through the connecting part 211.

[0041] It should be noted that the connecting part 211 and the rotating hole 221 can be rotated by setting a bearing. The extension part 213 can also be at an angle to the axis of the rotating hole 221, and is not limited to being perpendicular to the axis of the rotating hole 221. As long as the reciprocating movement of the push rod 232 can push the extension part 213, thereby causing the connecting part 211 to rotate relative to the rotating hole 221.

[0042] In one specific embodiment, there are two rotating holes 221, and the two ends of the connecting part 211 are respectively rotatably engaged with the two rotating holes 221.

[0043] In one embodiment, such as Figure 9 As shown, the corner cutting assembly 3 includes a cutter 31, a cutter support 32, and a cutter drive 33. The cutter drive 33 is connected to the cutter support 32, and the cutter 31 is connected to the cutter drive 33. The cutter drive 33 is used to drive the cutter 31 to heat-cut and seal the straightened corners of the packaging bag.

[0044] It is understandable that the cutter 31 is a hot cutter, and the cutter bracket 32 ​​is used to provide support for the cutter 31 and the cutter drive 33. The cutter drive 33 can be any drive unit such as a cylinder, as long as it can drive the cutter to cut off the corners of the straightened packaging bag.

[0045] In one embodiment, such as Figures 10-11 As shown, the corner trimming and chopping mechanism also includes a base 4 and a mounting base 5. There are four mounting bases 5, and all four mounting bases 5 are slidably connected to the base 4. The abutment 1, the scraper assembly 2, and the corner trimming assembly 3 are all connected to the mounting bases 5.

[0046] It is understandable that there are four abutment 1, four scraper assembly 2 and four corner cutting assembly 3. The four abutment 1, four scraper assembly 2 and four corner cutting assembly 3 are respectively connected to four mounting bases 5. By sliding the mounting base 5 on the base 4, the position of the abutment 1, four scraper assembly 2 and four corner cutting assembly 3 relative to the packaging box N can be adjusted, so as to adapt to packaging boxes N of different sizes.

[0047] It should be noted that the sliding connection between the base 4 and the mounting base 5 can be achieved in any way using guide rails and sliders, as long as the mounting base 5 can slide relative to the base 4, thereby adjusting the position of the four mounting bases 5 on the base 4.

[0048] In one specific embodiment, the four abutments 1 are divided into two groups, with two abutments in each group. The two groups of abutments 1 are located on opposite sides of the packaging box N to clamp and fix the packaging box N.

[0049] It should be noted that the support plate 1 can also be any other structure, as long as it can clamp and fix the packaging box N from the opposite sides of the packaging box N, and does not interfere with the cornering of the scraper assembly 2 and the corner cutting assembly 3.

[0050] Furthermore, the base 4 includes a first base plate 41 and a second base plate 42. There are two second base plates 42, and both second base plates 42 are slidably connected to the first base plate 41 along a first direction. The four mounting seats 5 are divided into two groups, with two in each group. The two groups of mounting seats 5 are respectively arranged on opposite sides of the second base plate 42 along a second direction. In this case, one or two mounting seats 5 in each group are slidably connected to the second base plate 42.

[0051] It is understandable that the two second base plates 42 can move closer to each other or further away from each other along the first direction on the first base plate 41, and each set of mounting seats 5 can move closer to each other or further away from each other along the second direction on the second base plate 42, so as to realize the adjustment of the relative positions of the abutment plate 1, scraper assembly 2 and corner cutting assembly 3 on the mounting seat 5 and the packaging box N.

[0052] In this embodiment, the two mounting seats 5 in each group are located on opposite sides of the second base plate 42. One mounting seat 5 is fixedly connected to the second base plate 42, and the other mounting seat 5 is slidably connected to the second base plate 42. By sliding the slidably connected mounting seat 5 relative to the second base plate 42, the two mounting seats 5 in each group can move closer or further apart on the second base plate 42. In some embodiments, both mounting seats 5 in each group can also be slidably connected to the second base plate 42, so that by simultaneously sliding the two mounting seats 5 in each group along the second direction on the second base plate 42, the two mounting seats 5 in each group can move closer or further apart.

[0053] Furthermore, two first guide rails 411 are provided on the first base plate 41 along the first direction, and two first sliders 421 are provided on the two second base plates 42 respectively. The two first guide rails 411 are slidably engaged with the first sliders 421 on the two second base plates 42 respectively.

[0054] It is understandable that the sliding connection between the first base plate 41 and the second base plate 42 can be achieved through the sliding engagement of the first guide rail 411 and the first slider 421.

[0055] In one specific embodiment, the first direction and the second direction are perpendicular to each other.

[0056] Furthermore, the base 4 also includes a first driving member 43, which is used to drive the second base plate 42 to slide relative to the first base plate 41 in a first direction.

[0057] In some embodiments, the first driving member 43 may be omitted, and the second base plate 42 may be slid in the first direction by directly applying external force. When it slides to a predetermined position, the position of the second base plate 42 may be fixed by setting any positioning member such as a positioning pin or a locking block.

[0058] Furthermore, the first driving component 43 includes a first driving motor 431, a first driving wheel 432, a first driven wheel 433, and a first synchronous belt 434. The output end of the first driving motor 431 is connected to the first driving wheel 432 for transmission. The first synchronous belt 434 is sleeved on the first driving wheel 432 and the first driven wheel 433 to form a belt drive. Each of the two second base plates 42 is provided with a first connecting block 422, which is connected to the opposite sides of the first synchronous belt 434 respectively.

[0059] It is understandable that when the first drive motor 431 is working, it drives the first drive wheel 432, the first driven wheel 433 and the first synchronous belt 434 to form a belt drive. After the two second base plates 42 are connected to the opposite sides of the first synchronous belt 434 respectively, when the first synchronous belt 434 is in motion, it can drive the two second base plates 42 to slide on the first base plate 41 in a direction that moves closer to each other or further away from each other.

[0060] It should be noted that the first driving component 43 can also be a cylinder or other driving unit, which directly pushes the two second base plates 42 to slide on the first base plate 41 in a direction that moves closer to or further away from each other.

[0061] Furthermore, a second guide rail 423 is provided on the side of the second base plate 42 away from the first base plate 41, and a second slider 51 is provided on one or two of the mounting seats 5 in each group. The second slider 51 slides in cooperation with the second guide rail 423 along the second direction.

[0062] It is understandable that the sliding connection between the mounting base 5 and the second base plate 42 can be achieved through the sliding engagement of the second guide rail 423 and the second slider 51.

[0063] Furthermore, the base 4 also includes a second driving member 44, which is used to drive the mounting base 5 to slide relative to the second base plate 42 in a second direction.

[0064] In some embodiments, the second driving component 44 may be omitted, and the mounting base 5 may be driven to slide in the second direction by applying external force manually. When it slides to the predetermined position, the position of the mounting base 5 may be fixed by setting any positioning component such as a positioning pin or a locking block.

[0065] Furthermore, the second driving component 44 includes a second driving motor 441, a second driving wheel 442, a second driven wheel 443, and a second synchronous belt 444. The output end of the second driving motor 441 is connected to the second driving wheel 442 for transmission. The second synchronous belt 444 is sleeved on the second driving wheel 442 and the second driven wheel 443 to form a belt drive. A second connecting block 52 is provided on one or two of the mounting seats 5 in each group. The second connecting block 52 is connected to the second synchronous belt 444.

[0066] Understandably, when both mounting seats 5 in each group are slidably connected to the second base plate 42, each of the two mounting seats 5 in each group is provided with a second connecting block 52. The second connecting blocks 52 on the two mounting seats 5 are respectively connected to the opposite sides of the second synchronous belt 444. When the second drive motor 441 works, it drives the second drive wheel 442, the second driven wheel 443, and the second synchronous belt 444 to form a belt drive. When the second synchronous belt 444 is driving, it can drive the two mounting seats 5 in each group to slide simultaneously towards or away from each other on the second base plate 42. However, when only one mounting seat 5 in each group is slidably connected to the second base plate 42, and the other is fixedly connected to the second base plate 42, the second connecting block 52 is only provided on the slidably connected mounting seat 5. When the second synchronous belt 444 is driving, it drives the mounting seat 5 on the second base plate 42 to move towards or away from the other fixedly connected mounting seat 5.

[0067] It should be noted that the second driving component 44 can also be a cylinder or other driving unit, which directly pushes the mounting base 5 to slide on the second base plate 42.

[0068] like Figure 12 As shown, the second embodiment of this utility model provides a packaging machine, which includes a feeding mechanism 6, a corner straightening and cutting mechanism, and a material picking mechanism 7. The feeding mechanism 6 is used to put the packaging box into the corner straightening and cutting mechanism, the corner straightening and cutting mechanism is used to straighten the corners of the packaging bag on the packaging box and heat-cut and seal it, and the material picking mechanism 7 is used to take away the packaging box after the corners are cut.

[0069] It is understandable that both the feeding mechanism 6 and the unloading mechanism 7 can be robotic arms.

[0070] Compared with the prior art, the corner straightening and cutting mechanism and packaging machine provided by this utility model straighten the corners of the packaging bag by rotating the scraper assembly, and after straightening, clamp the corners with the abutment and apply tension along the straightening direction, thereby combining the corner straightening and cutting processes. While straightening the corners, tension is also applied to the corners, which can ensure the effect of corner cutting, and there is no need to set up an additional corner pulling mechanism.

[0071] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A corner-cutting mechanism, characterized in that, This tool is used to trim and cut the corners of the packaging bag outside the packaging box. It includes: a backing plate, a scraper assembly and a corner cutting assembly. The backing plate is located on opposite sides of the packaging box and is used to clamp and fix the packaging box. The side of the backing plate near the scraper assembly is provided with an adsorption hole, which is connected to an external air source. The scraper assembly is located at the four corners of the packaging box and is used to rotate relative to the packaging box between the corner position and the avoidance position; When the scraper assembly is in the corner straightening position, it straightens the corners of the packaging bag and cooperates with the abutment to clamp the corners of the packaging bag and apply a pulling force to the corners in the straightening direction; when the scraper assembly is in the avoidance position, it separates from the corners of the packaging bag. The corner-cutting component is used to heat-cut and seal the straightened corners of the packaging bag.

2. The corner-cutting mechanism as described in claim 1, characterized in that: The scraper assembly includes a scraper, a scraper bracket, and a scraper drive. The scraper is rotatably connected to the scraper bracket, and the scraper drive is used to drive the scraper to rotate between the corner position and the avoidance position.

3. The corner-cutting mechanism as described in claim 2, characterized in that: The scraper includes a connecting part and a corner-cleaning part. The connecting part is rotatably connected to the scraper bracket. The scraper driving member is used to drive the connecting part to rotate relative to the scraper bracket. The corner-cleaning part is rotatably connected to the end of the connecting part away from the scraper bracket, and an elastic member is provided between the corner-cleaning part and the connecting part.

4. The corner-cutting mechanism as described in claim 3, characterized in that: The scraper bracket is provided with a rotating hole, and the connecting part is rotatably engaged with the rotating hole. The scraper drive component includes a scraper cylinder and a push rod. An extension is provided on the connecting part along a direction perpendicular to the axis of the rotating hole. The scraper cylinder is connected to the scraper bracket. One end of the push rod is connected to the output end of the scraper cylinder, and the end away from the scraper cylinder is connected to the extension.

5. The corner-cutting mechanism as described in claim 1, characterized in that: The corner cutting assembly includes a cutter, a cutter bracket, and a cutter drive. The cutter drive is connected to the cutter bracket, and the cutter is connected to the cutter drive. The cutter drive is used to drive the cutter to heat-cut and seal the straightened corners of the packaging bag.

6. The corner-cutting mechanism as described in claim 1, characterized in that: The corner trimming and chopping mechanism also includes a base and four mounting bases. All four mounting bases are slidably connected to the base, and the abutment, the scraper assembly, and the corner trimming assembly are all connected to the mounting bases.

7. The corner-cutting mechanism as described in claim 6, characterized in that: The base includes a first base plate and a second base plate. There are two second base plates, and both second base plates are slidably connected to the first base plate along a first direction. The four mounting seats are divided into two groups, with two mounting seats in each group. The two groups of mounting seats are respectively arranged on opposite sides of the second base plate along a second direction. In each group, one or two mounting seats are slidably connected to the second base plate.

8. The corner-cutting mechanism as described in claim 7, characterized in that: The base also includes a first driving component and a second driving component; Two first guide rails are provided on the first base plate along the first direction, and two first sliders are provided on the two second base plates. The two first guide rails slide in cooperation with the first sliders on the two second base plates respectively. The first driving component includes a first driving motor, a first driving wheel, a first driven wheel, and a first synchronous belt. The output end of the first driving motor is connected to the first driving wheel. The first synchronous belt is sleeved on the first driving wheel and the first driven wheel to form a belt drive. Each of the two second base plates is provided with a first connecting block, and the first connecting block is connected to the opposite sides of the first synchronous belt. A second guide rail is provided on the side of the second base plate away from the first base plate. A second slider is provided on one or two of the mounting seats in each group. The second slider slides in cooperation with the second guide rail along the second direction. The second driving component includes a second driving motor, a second driving wheel, a second driven wheel, and a second synchronous belt. The output end of the second driving motor is connected to the second driving wheel. The second synchronous belt is sleeved on the second driving wheel and the second driven wheel to form a belt drive. A second connecting block is provided on one or two of the mounting seats in each group. The second connecting block is connected to the second synchronous belt.

9. The corner-cutting mechanism as described in claim 1, characterized in that: A silicone pad is provided on the side of the abutment plate near the scraper assembly, and the scraper assembly abuts against the silicone pad when it is located at the corner position.

10. A packaging machine, characterized in that: The device includes a corner trimming and cutting mechanism, a feeding mechanism, and a picking mechanism as described in any one of claims 1-9. The feeding mechanism is used to place the packaging box into the corner trimming and cutting mechanism, the corner trimming and cutting mechanism is used to straighten the corners of the packaging bag on the packaging box and heat-seal them, and the picking mechanism is used to remove the packaged box after the corners have been cut.

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