Carton edge folding device

Abstract

The utility model relates to the technical field of carton processing equipment, in particular to a carton edge folding device. According to the carton edge folding device provided by the embodiment of the invention, the cover plate at the top of the carton is subjected to edge folding treatment through the lower pressing plate arranged at the bottom of the folding arm plate, the lower pressing plate can achieve first-stage centering edge folding treatment on the cover plate through the second step face, and therefore the cover plates on the two sides are in the centering edge folding state. And moreover, the lower pressing plate can also realize overpressure lagging treatment of the second stage of the cover plate through the first step surface, so that the cover plates on the two sides can be bent downwards to generate an overbreak angle, and the cover plates on the two sides are in an overpressure lagging treatment state. By the adoption of the structural design, the problem of rapid rebounding of the cover plate can be solved through the two-section edge folding technology, and therefore subsequent sealing operation on the cover plate of a carton is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of cardboard box processing equipment technology, and in particular to a cardboard box folding device. Background Technology

[0002] The carton folding process, also known as the carton centering folding process, refers to the process of folding the top edge of the carton's two flaps towards the center during specific manufacturing steps to achieve a seal. Carton centering folding designs the carton as a sealed structure, serving as a container for and transporting specific objects.

[0003] In related technologies, a carton folding machine is generally used to fold the edges of cartons. The carton folding machine includes a base, a conveyor belt, folding supports, and folding arms. The conveyor belt is mounted on the base, and the folding supports are symmetrically positioned on the base on both sides of the conveyor belt. Each folding arm slides horizontally on the folding supports. The carton to be folded is placed on the conveyor belt. When the carton moves into the working range of the folding arms, the two folding arms slide horizontally towards the center, thus folding the top edges of the carton.

[0004] However, in actual use, when the carton leaves the working range of the folding arm, the cover plates on both sides of its top edge will quickly spring back upward, thus affecting the subsequent sealing process of the carton. Summary of the Invention

[0005] In view of this, embodiments of this application provide a carton folding device to achieve a two-stage folding function through a stepped pressing structure.

[0006] To address the aforementioned technical problems, this application provides the following technical solutions:

[0007] A cardboard box folding device, comprising:

[0008] Base;

[0009] A belt conveyor, wherein the belt conveyor is disposed on the top surface of the base, and its conveyor belt is disposed parallel above the top surface of the base;

[0010] The support assembly includes supports symmetrically arranged on both sides of the base in the width direction, with two supports located on both sides of the belt conveyor respectively; each support is provided with a transverse beam, and a guide shaft support seat is fixedly provided on the top surface of each beam, and a hydraulic cylinder seat is also provided at its bottom;

[0011] The articulated boom assembly includes two articulated boom plates. A support frame is fixedly installed on the back of each articulated boom plate. The support frame is horizontally slidably connected to the guide shaft support seat and is also fixedly connected to the hydraulic cylinder piston rod fixedly installed on the cylinder seat. The working surface of each articulated boom plate is perpendicular to the top surface of the base.

[0012] Two lower pressure plates are respectively disposed at the bottom of the folding arm plate. The bottom of each lower pressure plate has a continuous stepped structure, including a first stepped surface near the crossbeam and a second stepped surface connected to it. The bottom surface of the first stepped surface is lower than the second stepped surface.

[0013] The height of the second stepped surface is flush with the top edge of the carton, so as to perform centering folding on the cover plate during horizontal movement, and to perform overpressure bending on the carton cover plate through the first stepped surface to produce viscoelastic deformation.

[0014] In some possible implementations, both ends of the articulated arm plate are provided with outwardly inclined bending portions, and the angle formed between the working surface and the surface of the bending portion is an obtuse angle.

[0015] In some possible implementations, the end of the bend extends beyond the outer edge of its corresponding bracket.

[0016] In some possible implementations, the support frame includes a fixing part that is fixedly welded to the articulated arm plate;

[0017] A sliding part is fixedly connected to the fixed part and is horizontally slidably connected to the guide shaft support through the through hole;

[0018] The limiting part is fixedly connected to the end of the sliding part, and a connecting plate is provided extending downward therefrom. The connecting plate is fixedly connected to the piston rod of the hydraulic cylinder.

[0019] In some possible implementations, the bracket is bolted to the base via a first sheet metal, which is L-shaped, with its vertical side welded to the bracket and its horizontal side having mounting holes.

[0020] A second sheet metal is provided at the middle of the support in the height direction, and the second sheet metal is bolted to the top surface of the frame of the belt conveyor.

[0021] In some possible implementations, the lower pressure plate abuts against the side of the crossbeam to achieve a limiting function.

[0022] In some possible implementations, an elastic buffer layer is provided at the bottom of the lower pressure plate, the elastic buffer layer being made of polyurethane material; the elastic buffer layer can be fitted into the main body of the lower pressure plate through a dovetail groove structure.

[0023] Among the possible implementation methods is an infrared sensor;

[0024] The infrared sensor is electrically connected to the hydraulic cylinder via a PLC controller, and is used to trigger the piston rod of the hydraulic cylinder when the carton reaches a set position.

[0025] The carton folding device provided in this application has at least the following beneficial effects:

[0026] In the carton folding device provided in this application embodiment, the top cover of the carton is folded by a lower pressure plate located at the bottom of the folding arm plate. The lower pressure plate performs a first-stage centering folding process on the cover plate using a second-step surface, thereby ensuring that both cover plates are in a centering folded state. Furthermore, the lower pressure plate also performs a second-stage over-pressure springback process on the cover plate using the first-step surface, allowing both cover plates to bend downwards to create an over-fold angle, thus ensuring that both cover plates are in an over-pressure springback state. This structural design solves the problem of rapid cover plate rebound through a two-stage folding process, facilitating subsequent sealing operations on the carton cover. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of the carton folding device according to an embodiment of this application;

[0029] Figure 2 for Figure 1 A schematic diagram of the side structure;

[0030] Figure 3 for Figure 1 Schematic diagram of the bottom structure of the middle and lower pressure plates;

[0031] Figure 4 for Figure 1 A schematic diagram of the assembly structure of another embodiment of the folding arm assembly and bracket;

[0032] Figure 5 for Figure 1 A schematic diagram of another embodiment of the structure.

[0033] In the picture:

[0034] 100. Base; 200. Belt conveyor; 210. Conveyor belt; 300. Bracket; 310. First sheet metal; 320. Second sheet metal; 400. Crossbeam; 410. Cylinder seat; 500. Guide shaft support seat; 600. Folding arm plate; 610. Bending part; 700. Support frame; 710. Fixing part; 720. Sliding part; 730. Limiting part; 740. Connecting plate; 800. Lower pressure plate; 810. First stepped surface; 820. Second stepped surface; 900. Hydraulic cylinder. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0036] like Figures 1-3 As shown in the figure, the carton folding device provided in this application embodiment includes a base 100, a belt conveyor 200, a bracket set 300, a folding arm assembly, and two lower pressure plates 800. The base 100 is the load-bearing structure of the folding device, and its main function is to transfer the load to the foundation. The belt conveyor 200 is a mechanical device that uses friction to continuously transport materials. The belt conveyor 200 generally consists of a conveyor belt 210, a frame, and a transmission device. The conveyor belt 210 is wound around the frame and driven by the transmission device to reciprocate, thereby realizing the function of conveying materials using the conveyor belt 210.

[0037] The belt conveyor 200 is fixedly mounted on the top surface of the base 100 via its frame. The belt conveyor 200 is located in the central area of ​​the top surface of the base 100, and the conveyor belt 210 of the belt conveyor 200 is parallel to the top surface of the base 100. Therefore, the belt conveyor 200 can transport objects from the first end of the base 100 to the second end.

[0038] In this embodiment, the bracket group 300 consists of two brackets 300. With the center line of the base 100 in the width direction as the axis of symmetry, the two brackets 300 are symmetrically arranged on the top surface of the base 100 and also located on both sides of the belt conveyor 200. Each bracket 300 consists of two frames, with a crossbeam 400 arranged laterally between the two frames. Two guide shaft support seats 500 are arranged on the top surface of the crossbeam 400 with its center line in the length direction as the axis of symmetry. Each guide shaft support seat 500 has a through hole for lateral sliding. Furthermore, a cylinder seat 410 is fixedly installed at the bottom of the crossbeam 400.

[0039] Continue as Figures 1-3 As shown, each articulated arm assembly consists of two articulated arm plates 600. The working surface of each articulated arm plate 600 is perpendicular to the top surface of the base 100. The back of the articulated arm plate 600 is fixedly connected to the support frame 700, which is horizontally slidably disposed within the through hole of the guide shaft support seat 500. This allows the articulated arm plate 600 in a single-sided position to move laterally relative to the bracket 300, and ensures that the articulated arm plates 600 in two opposite positions can move towards each other or in opposite directions. In addition, the articulated arm plate 600 is also fixedly connected to the piston rod end of the hydraulic cylinder 900 via the support frame 700. The hydraulic cylinder 900 is fixedly disposed on the top surface of the cylinder seat 410 and serves as the power source for driving the articulated arm plate 600 to move.

[0040] like Figure 3 As shown, the number of lower pressure plates 800 is equal to the number of folding arm plates 600, and they correspond one-to-one. The lower pressure plates 800 are fixedly installed at the bottom of the folding arm plates 600. The bottom of the lower pressure plates 800 is formed by splicing a first stepped surface 810 and a second stepped surface 820 to form a continuous stepped structure, with the first stepped surface 810 and the second stepped surface 820 connected. Furthermore, the first stepped surface 810 is located near the crossbeam 400, and its bottom surface is below the bottom surface of the second stepped surface 820. The second stepped surface 820 is located away from the crossbeam 400. The lower pressure plates 800 can also be limited by abutting against the side of the crossbeam 400.

[0041] Furthermore, the height of the second stepped surface 820 is flush with the top edge of the carton to be folded. This allows the lower pressure plate 800 to center and fold the top cover of the carton via the second stepped surface 820 when the carton moves horizontally on the conveyor belt 210. In addition, the lower pressure plate 800 can also over-bend the top cover of the carton via the first stepped surface 810, causing it to undergo viscoelastic deformation, thereby preventing the cover from rapidly springing back after disengaging from the folding arm plate 600.

[0042] The working principle and process of the carton folding device provided in the embodiments of this application are described below.

[0043] The carton to be folded is placed on the conveyor belt 210 of the belt conveyor 200, and the conveying speed of the belt conveyor 200 is adjusted to a suitable value. The carton to be folded is transported to the working area of ​​the folding arm assembly via the conveyor belt 210 of the belt conveyor 200. The piston rod of the hydraulic cylinder 900 drives the folding arm plates 600 on both sides to move towards each other. At this time, the lower pressure plate 800 contacts the cover plate on the top of the carton through its working surface and the second step surface 820. As the lower pressure plate 800 moves continuously, the cover plate gradually rotates downward, thereby realizing the first stage of centering and folding processing.

[0044] When the folding arm plates 600 on both sides of the belt conveyor 200 continue to move towards each other, the lower pressure plate 800 will contact the cover plate on the top of the carton through the first step surface 810, thereby pressing the cover plate downward through the first step surface 810, causing it to bend downward and generate an over-fold angle, until a hysteretic deformation is formed between the cover plate and the top of the carton, thus realizing the second stage of over-pressure hysteretic deformation treatment.

[0045] In practical use, an infrared sensor can be installed on the feed end side of the belt conveyor 200. The infrared sensor is electrically connected to the hydraulic cylinder 900 through a PLC controller. Once the carton reaches the set position via the belt conveyor 200, the infrared sensor can receive the signal that the carton has arrived and control the piston rod of the hydraulic oil to move at a uniform speed and perform corresponding actions, thereby realizing the function of automatically folding the top cover of the carton.

[0046] The aforementioned structure enables precise detection of the carton's position using an infrared sensor, and the timing of triggering the piston rod of the hydraulic cylinder 900 is synchronized with the belt conveyor speed to prevent missed folds or repeated processing. Simultaneously, PLC control allows for programmable adjustment of folding process parameters (such as pressure and stroke) to adapt to the flexible production needs of cartons of different sizes. Furthermore, automated control reduces manual intervention and significantly improves production cycle time and processing consistency.

[0047] In the carton folding device provided in this embodiment, the lower pressure plate 800 at the bottom of the folding arm plate 600 folds the top cover of the carton. The lower pressure plate 800 performs a first-stage centering folding process on the cover through the second stepped surface 820, thereby ensuring that both cover plates are in a centering folded state. Furthermore, the lower pressure plate 800 performs a second-stage over-pressure springback process on the cover through the first stepped surface 810, allowing both cover plates to bend downwards to create an over-fold angle, thus ensuring that both cover plates are in an over-pressure springback state. This structural design solves the problem of rapid cover plate rebound through a two-stage folding process, facilitating subsequent sealing of the carton cover.

[0048] In some embodiments, the folding arm 600 has outwardly inclined bending portions 610 at both ends along its length. The folding arm 600 makes pre-contact with the carton through the bending portions 610, and the working surface of each bending portion 610 forms an obtuse angle with the working surface of the folding arm 600. The obtuse angle design makes the entire folding process smoother, thereby reducing the instantaneous impact force of the folding arm 600 on the carton cover and avoiding material tearing.

[0049] Preferably, the end of the bend 610 extends beyond the outer edge of its corresponding bracket 300, which ensures that the folding arm 600 can still completely cover the edge of the carton cover at its maximum stroke, thereby avoiding any unfolded areas on the cover.

[0050] In some embodiments, the support frame 700 includes a fixing part 710, a sliding part 720, and a limiting part 730. For example... Figure 4 As shown, the support frame 700 is welded to the back of the articulated arm plate 600 via a fixing part 710. The fixing part 710 is fixedly connected to the sliding part 720, and the support frame 700 slides horizontally through the through hole of the guide shaft support column via the sliding part 720. The limiting part 730 is connected to the end of the sliding part 720, and a connecting plate 740 extends downward from the center of the limiting part 730. The connecting plate 740 is fixedly connected to the piston rod of the hydraulic cylinder 900. The multi-stage structure design of the support frame 700 simplifies its processing and assembly, thereby reducing the actual manufacturing cost.

[0051] In some embodiments, such as Figure 5 As shown, the bracket 300 is bolted to the base 100 via a first sheet metal 310 at its bottom. The first sheet metal 310 is L-shaped, consisting of a vertical side and a horizontal side. The first sheet metal 310 is welded to the bracket 300 via its vertical side and has mounting holes for bolting via its horizontal side. Furthermore, the middle of the bracket 300 in the height direction is bolted to the top surface of the belt conveyor 200 frame via a second sheet metal 320. This two-piece sheet metal structure enhances the connection strength between the bracket 300 and the base 100, forming a rigid overall frame that resists forces generated during the folding process and reduces the impact of belt conveyor 200 vibration on the folding accuracy of the carton.

[0052] In some embodiments, an elastic buffer layer made of polyurethane is provided at the bottom of the lower pressure plate 800. The elastic buffer layer can be fitted into the main body of the lower pressure plate 800 through a dovetail groove structure. The highly elastic interlayer made of polyurethane can buffer the impact force of the folding arm plate 600 on the carton cover, thereby reducing indentations or scratches on the surface of the cover. Furthermore, the dovetail groove structure also allows for quick replacement of the elastic buffer layer to suit carton processing with different hardness requirements, thereby improving the versatility of the equipment.

[0053] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0054] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0055] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0056] It should be readily understood that the terms “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on top of something” but also “on top of something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0057] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0058] As used herein, the term "substrate" refers to the material on which subsequent material layers are added. The substrate itself may be patterned. The material added on top of the substrate may be patterned or may remain unpatterned. Furthermore, the substrate may include a wide range of materials, such as silicon, germanium, gallium arsenide, indium phosphide, etc. Alternatively, the substrate may be made of a non-conductive material (e.g., glass, plastic, or sapphire wafers).

[0059] The term "layer" as used herein can refer to a portion of material comprising a region of thickness. A layer may extend over the entire underlying or overlying structure, or may have a extent smaller than that of the underlying or overlying structure. Furthermore, a layer may be a region of a homogeneous or non-homogeneous continuous structure, with a thickness less than that of the continuous structure. For example, a layer may be located between the top and bottom surfaces of the continuous structure, or between any pairs of lateral planes at the top and bottom surfaces. A layer may extend laterally, vertically, and / or along a tapered surface. A substrate may be a layer, and may include one or more layers, and / or may have one or more layers located on, above, and / or below it. A layer may include multiple layers. For example, an interconnect layer may include one or more conductor and contact layers (forming contacts, interconnects, and / or vias therein) and one or more dielectric layers.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A cardboard box folding device, characterized in that, include: Base (100); A belt conveyor (200) is disposed on the top surface of the base (100), and its conveyor belt (210) is disposed parallel above the top surface of the base (100); The support assembly includes supports (300) symmetrically arranged on both sides of the width direction of the base (100), with the two supports (300) located on both sides of the belt conveyor (200); each support (300) is provided with a horizontal beam (400), and a guide shaft support seat (500) is fixedly provided on the top surface of each beam (400), and a cylinder seat (410) is also provided at its bottom; The articulated boom assembly includes two articulated boom plates (600), each of which has a support frame (700) fixedly mounted on its back. The support frame (700) is horizontally slidably connected to the guide shaft support seat (500) and is also fixedly connected to the piston rod of the hydraulic cylinder (900) fixedly mounted on the cylinder seat (410). The working surface of each articulated boom plate (600) is perpendicular to the top surface of the base (100). Two lower pressure plates (800) are respectively disposed at the bottom of the folding arm plate (600), and their bottoms are provided with a continuous stepped structure, which includes a first stepped surface (810) near the crossbeam (400) and a second stepped surface (820) connected thereto, wherein the bottom surface of the first stepped surface (810) is lower than that of the second stepped surface (820); wherein, The height of the second stepped surface (820) is flush with the top edge of the carton, so as to perform centering folding on the cover plate during horizontal movement, and to perform overpressure bending on the carton cover plate through the first stepped surface (810) to produce hysteretic deformation.

2. The carton folding device according to claim 1, characterized in that: Both ends of the articulated arm plate (600) along its length are provided with outwardly inclined bending portions (610), and the angle formed between its working surface and the surface of the bending portion (610) is an obtuse angle.

3. The carton folding device according to claim 2, characterized in that: The end of the bend (610) extends beyond the outer edge of its corresponding bracket (300).

4. The carton folding device according to claim 1, characterized in that: The support frame (700) includes a fixing part (710), which is fixedly welded to the folding arm plate (600); The sliding part (720) is fixedly connected to the fixed part (710) and is horizontally slidably connected to the guide shaft support (500) through a through hole; A limiting part (730) is fixedly connected to the end of the sliding part (720), and a connecting plate (740) is provided extending downward therefrom, which is fixedly connected to the piston rod of the hydraulic cylinder (900).

5. The carton folding device according to claim 1, characterized in that: The bracket (300) is bolted to the base (100) via a first sheet metal (310). The first sheet metal (310) is L-shaped, with its vertical side welded to the bracket (300) and its horizontal side provided with mounting holes. A second sheet metal (320) is provided at the middle of the height direction of the bracket (300), and the second sheet metal (320) is bolted to the top surface of the frame of the belt conveyor (200).

6. The carton folding device according to claim 1, characterized in that: The lower pressure plate (800) abuts against the side of the crossbeam (400) to achieve the limiting function.

7. The carton folding device according to claim 1, characterized in that: The bottom of the lower pressure plate (800) is provided with an elastic buffer layer, which is made of polyurethane material; the elastic buffer layer can be fitted with the main body of the lower pressure plate (800) through a dovetail groove structure.

8. The carton folding device according to claim 1, characterized in that: It also includes an infrared sensor; The infrared sensor is electrically connected to the hydraulic cylinder (900) via a PLC controller. It is used to trigger the piston rod of the hydraulic cylinder (900) when the carton reaches the set position.

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