Short-edge carton sealing machine

Abstract

The utility model relates to the technical field of box sealing, in particular to a short-edge box sealing machine which comprises a box sealing machine body, and the box sealing machine body is provided with a feeding unit and an adhesive tape end smoothing unit. The feeding unit comprises two self-adaptive material pressing mechanisms and a supporting conveying belt, wherein the two self-adaptive material pressing mechanisms are symmetrically arranged in the direction perpendicular to the conveying direction of the box body, and the self-adaptive material pressing mechanisms are used for pressing the box body from the upper portion in a self-adaptive mode. The adhesive tape end smoothing unit is installed on the outer side of the self-adaptive material pressing mechanism or the supporting conveying belt corresponding to the self-adaptive material pressing mechanism. According to the utility model, the adhesive tape end part smoothing unit is directly arranged on the outer side of the self-adaptive material pressing mechanism or the corresponding support conveying belt, so that the seamless connection of two key processes of accurate pressing and instant smoothing in space and time is realized, and the idle running time generated by position adjustment and action waiting between modules in the traditional discrete layout is eliminated; therefore, the continuous operation efficiency and the production takt of the whole machine are obviously improved.

Description

Technical Field

[0001] This utility model relates to the field of box sealing technology, and in particular to a short-side box sealing machine. Background Technology

[0002] In automated packaging lines, carton sealing machines are key equipment for sealing carton bodies. Existing carton sealing machines typically include a pressing device for conveying and pressing the carton body, and a smoothing device for smoothing and affixing the tape ends to the carton body end face.

[0003] However, in existing technologies, the aforementioned functions are mostly achieved by piecing together independently designed, installed, and controlled unit modules. The lack of effective coordination and integration between these units results in inherent defects in efficiency, adaptability, and sealing quality, making it difficult to meet the demands of modern high-speed, flexible production. Specifically, the shortcomings of existing technologies are mainly reflected in the following three aspects:

[0004] 1. Low tape end smoothing efficiency: Currently, most common tape end smoothing solutions use a rotary cylinder to directly drive the brush to swing. Although the structure is straightforward, the rotary cylinder has a delay in starting, stopping, and reversing response, resulting in poor motion stability. This fundamentally limits the brush's swing speed and frequency, making it unsuitable for high-speed sealing cycles.

[0005] 2. Poor adaptability to material handling: To accommodate boxes of different widths, carton sealing machines are typically equipped with an adjustable spacing unit. A typical existing structure (such as...) Figure 6 For example, the applicant has disclosed a long-side sealing machine (publication number CN222988512U), which includes a large-stroke cylinder 800, two sets of transverse slide rails 703, a mounting frame 4213, a pressing conveyor 410, and a mechanical limit switch 900. It uses the large-stroke cylinder to drive the upper pressing conveyor belt and the entire assembly (two sets of transverse slide rails, mounting frame, and mechanical limit switch) to rise and fall. After reaching the desired position, the cylinder cuts off the air supply, and the machine's own weight presses the box. This structure has two major drawbacks: First, the pressing mechanism has a large overall weight. When the cylinder cuts off the air supply, the entire weight acts as pressure on the top of the box, which can easily cause deformation of the box or damage to the internal products due to excessive pressure. Second, the pressing conveyor belts on the left and right sides are linked by a rigid frame (the linear guide rail of the adjustable unit) and must rise and fall synchronously, not independently. In actual production, when the height of the products inside the box is different, there will inevitably be a height difference between the top surfaces of the two sides of the box. At this point, one side of the pressure belt will be pressed too tightly, while the other side will not be pressed firmly or will be completely suspended. This will cause uneven force on the box during the conveying process, resulting in skewing and jamming, which will seriously affect the accuracy of the sealing position and the stability of the production line operation.

[0006] 3. Discrete Layout of Functional Units: The existing capping mechanism, pressing mechanism, and smoothing mechanism are usually separated and fixedly installed in their mechanical layout. This "independent" discrete layout brings systemic defects: First, there is physical idle time and waiting time in the connection between the actions of each unit, which makes it impossible to achieve a continuous action cycle of pressing and smoothing, thus limiting the further improvement of the overall production cycle. Second, when it is necessary to adapt to different sizes of boxes, the operator must manually adjust the position of multiple independent units (such as the height of the smoothing unit, the lateral position of the capping mechanism, etc.), which is cumbersome, time-consuming, and prone to affecting the sealing quality due to misalignment, resulting in low equipment flexibility.

[0007] Therefore, how to provide a short-side sealing machine that can achieve a compact structure, precise pressure, and adaptive adjustment to avoid damaging the box, while also efficiently and reliably smoothing the tape ends, has become a pressing technical problem in this field. To address this, we have designed a short-side sealing machine. Utility Model Content

[0008] In order to overcome the shortcomings of the prior art, this utility model discloses a short-side sealing machine, which aims to overcome the problems of the discrete distribution of functional units and the imprecise pressure control and poor adaptability of the pressing device in the prior art. In particular, when the height of the two sides of the box is different due to uneven placement of products inside, the traditional linkage pressing method will cause one side to be pressed too tightly while the other side is not pressed firmly, which will cause the box to tilt during the conveying process, affect the smoothing of the tape end and the stability of the production line.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A short-side sealing machine includes a sealing machine body, the sealing machine body having a feeding unit and a tape end smoothing unit;

[0011] The feeding unit includes two adaptive pressing mechanisms and a support conveyor belt arranged symmetrically along the conveying direction perpendicular to the box body. The adaptive pressing mechanisms are used to adaptively press the box body from above.

[0012] The tape end smoothing unit is installed on the outside of the adaptive pressing mechanism or the corresponding support conveyor belt. It includes a swingable brush. By swinging the brush counterclockwise or clockwise, the head or tail end of the tape extending from the end of the box is pressed against the end face of the box.

[0013] Furthermore, the tape end smoothing unit also includes:

[0014] Fixed support;

[0015] A cylinder, the cylinder body of which is fixed to the fixed support along the conveying direction of the housing;

[0016] A rack is fixed to the end of the piston rod of the cylinder and is arranged parallel to the extension and retraction direction of the piston rod;

[0017] A gear, which is rotatably mounted on the fixed support via a first wheel shaft and meshes with the rack;

[0018] The brush is fixed to the first wheel axle, and the direction of extension of its bristles is perpendicular to the axis of the first wheel axle.

[0019] Furthermore, the tape end smoothing unit also includes at least one guide wheel, which is rotatably mounted on the fixed support via a second wheel shaft, and its wheel rim surface rolls in contact with the back of the teeth of the rack.

[0020] Furthermore, the gear and at least one of the guide wheels are symmetrically arranged about the rack.

[0021] Furthermore, the adaptive pressing mechanism includes a pressing conveyor belt and a secondary drive mechanism for driving the pressing conveyor belt to rise and fall;

[0022] The secondary drive mechanism includes:

[0023] A primary positioning component is used to drive the pressing conveyor belt to rise and fall to a position close to the upper surface of the box;

[0024] The secondary pressing assembly is connected between the output end of the primary positioning assembly and the pressing conveyor belt, and is used to provide a constant downward pressure to the pressing conveyor belt.

[0025] Furthermore, the primary positioning component includes:

[0026] A servo motor is mounted on the body of the carton sealing machine;

[0027] A lead screw and nut assembly, wherein the lead screw is connected to the output shaft of the servo motor for transmission.

[0028] Mounting bracket, which is fixedly connected to the nut of the lead screw nut pair;

[0029] The primary guide post, and the secondary clamping assembly slides in a corresponding manner with the primary guide post.

[0030] Furthermore, the secondary clamping assembly includes:

[0031] The longitudinal beam is correspondingly provided on the mounting frame and slides in cooperation with the main directional column;

[0032] At least one pressing cylinder, the cylinder body of which is connected to the longitudinal beam, and the piston rod of which is connected to the pressing conveyor belt;

[0033] At least one set of vertical guide components, the fixed part of which is connected to the longitudinal beam and the sliding part of which is connected to the pressing conveyor belt.

[0034] Furthermore, the carton sealing machine body also has a carton cover pressing mechanism, which includes a laterally movable pressure roller and a driving device for driving the pressure roller to move laterally. The driving device is installed on the outside of the support conveyor belt or the corresponding adaptive pressing mechanism.

[0035] Furthermore, the sealing machine body also has a spacing adjustment unit, which includes:

[0036] A drive motor is mounted on the body of the carton sealing machine;

[0037] The transmission assembly has two moving parts that can move synchronously relative to or opposite to each other;

[0038] Two sets of horizontally arranged linear slide rails are installed on the body of the carton sealing machine.

[0039] The drive motor is configured to drive the transmission assembly to move, thereby causing the two adaptive pressing mechanisms and the two support conveyor belts to move towards or away from each other along their respective linear slide rails, so as to achieve synchronous adjustment of their spacing.

[0040] Compared with existing technologies, the short-side sealing machine provided by this utility model deeply integrates the tape end smoothing unit and the adaptive pressing mechanism in terms of structure and function, forming an organically coordinated sealing system, thereby achieving the following series of significant beneficial effects:

[0041] 1. The tape end smoothing unit is directly installed on the outside of the adaptive pressing mechanism or the corresponding support conveyor belt. This integrated layout makes the smoothing unit no longer an independent fixed module on the frame, but a functional extension of the feeding unit. Specifically, the tape end smoothing unit can be raised, lowered, and its spacing adjusted synchronously with the adaptive pressing mechanism. This ensures that the brush always maintains the optimal working distance from the end face of the box, achieving seamless connection between the two key processes of precise pressing and immediate smoothing in space and time. This eliminates the idle time caused by the position adjustment and action waiting between modules in the traditional discrete layout, thereby significantly improving the continuous operation efficiency and production cycle of the whole machine.

[0042] 2. Two independently controllable adaptive pressing mechanisms are employed, each with a two-stage drive mechanism to separate coarse positioning and fine pressing. The primary positioning component bears the main structural weight and achieves rapid lifting and positioning, while the secondary pressing component subsequently provides constant, slight downward pressure. This design not only fundamentally solves the problem of traditional integral lifting pressing mechanisms being prone to damaging the box due to excessive weight, but more importantly, it allows the pressing conveyor belts on both sides to independently and adaptively fine-tune and press according to the unevenness of the box's top surface. When the products inside the box are of varying heights, this structure ensures that both sides of the box are effectively and appropriately compacted, thus completely avoiding box conveying deviation and jamming caused by insufficient or excessive pressing on one side. This provides an extremely stable conveying foundation for subsequent high-quality box sealing operations.

[0043] 3. The tape end smoothing unit employs a cylinder-driven linear-rotation conversion mechanism with a rack and pinion, which inherently possesses advantages such as fast response speed and smooth movement. In existing technologies, this advantage may not be fully realized due to fixed positioning. In this solution, since the tape end smoothing unit is integrated into the feeding unit, its efficient smoothing action can be precisely executed directly on the stably pressed box, fully releasing its efficiency. The stable, non-skewed pressing and conveying provided by the adaptive pressing mechanism is a prerequisite for achieving efficient and precise smoothing. The synergistic work of the two allows the advantages of stable pressing and efficient smoothing to mutually promote and guarantee each other, jointly improving the reliability and consistency of the box sealing quality.

[0044] 5. The pitch adjustment unit can drive two adaptive pressing mechanisms and the supporting conveyor belt to move synchronously in opposite directions or back to back. Since the belt end smoothing unit and the optional box cover clamping mechanism are integrated into these movable components, they can automatically and synchronously shift with the overall machine width adjustment. This allows the operator to perform only one pitch adjustment action when switching between different box widths, completing the position adjustment of all relevant functional units at once, significantly simplifying the operation process, shortening changeover time, and effectively improving the equipment's flexible production level and versatility. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the structure of this utility model;

[0046] Figure 2 This is a structural schematic diagram of the present invention from another perspective;

[0047] Figure 3 for Figure 1 Enlarged view of part I in the image;

[0048] Figure 4 for Figure 2 Enlarged view of part II in the image;

[0049] Figure 5 This is a schematic diagram of the tape end smoothing unit in this utility model;

[0050] Figure 6 This is a schematic diagram of the existing technology.

[0051] In the picture: 100, the carton sealing machine body;

[0052] 200. Tape end smoothing unit; 201. Fixing support; 202. Cylinder; 203. Rack; 204. Gear; 205. Brush; 206. Guide wheel;

[0053] 300. Feeding unit;

[0054] 400. Adaptive pressing mechanism; 410. Pressing conveyor belt; 420. Secondary drive mechanism; 421. Primary positioning assembly; 4211. Servo motor; 4212. Lead screw and nut pair; 4213. Mounting bracket; 4214. Main guide column; 422. Secondary clamping assembly; 4220. Longitudinal beam; 4221. Clamping cylinder; 4222. Vertical guide assembly;

[0055] 500. Support conveyor belt;

[0056] 600. Box cover clamping mechanism; 601. Pressure roller; 602. Drive device;

[0057] 700. Adjustable pitch unit; 701. Drive motor; 702. Transmission assembly; 703. Linear guide rail;

[0058] 800, long stroke cylinder;

[0059] 900. Mechanical limit switch. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. It should be noted that in the description of this utility model, the terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. 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 element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0061] Furthermore, the terms "installation," "connection," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0062] The following will be combined with the appendix Figures 1 to 5 The specific embodiments of this utility model will be described in detail below. It is understood that the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0063] Example 1: A short-side sealing machine. Please refer to [link / reference]. Figure 1 and Figure 2 The short-side sealing machine provided in this embodiment includes a sealing machine body 100, which has core components such as a tape end smoothing unit 200, a feeding unit 300, and a spacing adjustment unit 700. The sealing machine body 100 serves as the supporting frame for the entire device. The feeding unit 300 is used to convey and press the box to be sealed. The tape end smoothing unit 200 is mounted on the feeding unit 300 and is used to smooth and press the tape head or tail end that extends beyond the short side of the box after sealing onto the end face of the box. The spacing adjustment unit 700 is used to synchronously adjust the spacing of relevant components in the feeding unit 300 according to the box size.

[0064] like Figure 5 As shown, the tape end smoothing unit 200 includes a fixed support 201, a cylinder 202, a rack 203, a gear 204, and a brush 205.

[0065] Specifically, the fixed support 201 provides a mounting base for the various components within the tape end smoothing unit 200. In this embodiment, the cylinder body of the cylinder 202 is along the conveying direction of the housing (i.e., Figure 1 The cylinder 202 is fixed to the fixed support 201 in the forward and backward direction. The rack 203 is fixedly connected to the end of the piston rod of the cylinder 202, and its length direction is parallel to the extension and retraction direction of the piston rod. The gear 204 is rotatably supported on the fixed support 201 via the first wheel axle (not shown in the figure) and is engaged with the rack 203. The brush 205 is fixedly installed on the first wheel axle, and the extension direction of its bristles is perpendicular to the axis of the first wheel axle.

[0066] The working principle of the tape end smoothing unit 200 is as follows: When the sealed box is transported to the smoothing station, the piston rod of the cylinder 202 extends (or retracts), driving the rack 203 to move backward (or forward) in a linear motion. The rack 203 drives the gear 204 meshing with it to rotate, thereby driving the brush 205 to swing counterclockwise (or clockwise). The bristles of the brush 205 sweep and press the tape head (or tail) that extends from the front (or rear) end of the box and stick it to the end face of the box. Subsequently, the cylinder 202 resets, completing one reciprocating swing smoothing action. Compared with the existing technology that uses a rotary cylinder to directly drive the brush, this solution uses the cylinder 202 to drive the rack 203 to move linearly, which in turn drives the gear 204 and the brush 205 to rotate. This transmission method is simple and reliable, has a fast response speed, and can better adapt to the fast sealing cycle.

[0067] To further improve the smoothness of rack 203's movement, reduce wobble, and ensure the accuracy and durability of gear-rack meshing, such as... Figure 5 As shown, the tape end smoothing unit 200 is preferably provided with at least one guide wheel 206. The guide wheel 206 is rotatably mounted on the fixed support 201 via a second wheel axle. The rim of the guide wheel 206 rolls into contact with the back of the teeth of the rack 203 (i.e., the smooth, toothless surface on the rack facing away from the gear 204), thereby providing support and guidance for the rack 203.

[0068] Even better, such as Figure 5 As shown, this embodiment uses a guide wheel 206, which is symmetrically arranged with the gear 204 about the rack 203 to form a two-point stable support, so that the rack 203 is subjected to balanced force and runs more smoothly.

[0069] The feeding unit 300 is responsible for conveying and pressing the box. For example... Figure 1 , Figure 2 As shown, the feeding unit 300 includes two adaptive pressing mechanisms 400 arranged symmetrically in the transverse direction (i.e., perpendicular to the conveying direction of the box). Each adaptive pressing mechanism 400 includes a pressing conveyor belt 410 and a secondary drive mechanism 420 for driving the pressing conveyor belt 410 to lift as a whole.

[0070] The secondary drive mechanism 420 consists of a primary positioning component 421 and a secondary clamping component 422.

[0071] The primary positioning component 421 drives the pressing conveyor belt 410 to rapidly rise and fall to a predetermined position close to the upper surface of the box, and bears most of the weight of the pressing conveyor belt 410 and its related components. It mainly includes a servo motor 4211, a lead screw and nut pair 4212, a mounting bracket 4213, and at least two vertically arranged guide columns 4214. The servo motor 4211 is mounted on the sealing machine body 100. The lead screw of the lead screw and nut pair 4212 is vertically mounted on the sealing machine body 100 via bearings and is drively connected to the output shaft of the servo motor 4211. The mounting bracket 4213 is fixedly connected to the nut of the lead screw and nut pair 4212 and slides with the guide columns 4214, forming a stable vertical guide. When the servo motor 4211 rotates, it drives the mounting bracket 4213 to precisely rise or fall along the main guide column 4214 via the lead screw and nut pair 4212, thereby moving the entire secondary clamping assembly 422 and the pressing conveyor belt 410 to a preset height position (e.g., 5-10 mm away from the estimated upper surface of the housing). During this process, most of the weight of the pressing conveyor belt 410 and its drive mechanism is borne by the lead screw and nut pair 4212 and the main guide column 4214, rather than acting directly on the housing.

[0072] The secondary clamping assembly 422 is connected between the output end (mounting bracket 4213) of the primary positioning assembly 421 and the housing of the pressing conveyor belt 410, providing constant, slight downward pressure after precise positioning. It includes a longitudinal beam 4220, at least one clamping cylinder 4221, and at least one set of vertical guide assemblies 4222. The cylinder body of the clamping cylinder 4221 is connected to the longitudinal beam 4220, and its piston rod is connected to the housing of the pressing conveyor belt 410. The vertical guide assembly 4222 can be in the form of a linear guide pair, with its slider fixed to the mounting bracket 4213 and its guide rail fixed to the housing of the pressing conveyor belt 410, providing guidance for the slight movement of the pressing conveyor belt 410 relative to the crossbeam.

[0073] In this embodiment, both ends of the longitudinal beam 4220 and both ends of the pressing conveyor belt 410 are provided with a set of pressing cylinders 4221 and vertical guide components 4222.

[0074] Furthermore, the pressing cylinder 4221 is connected to the air source through a two-position five-way solenoid valve, so that the piston rod of the pressing cylinder 4221 can move freely after the two-position five-way solenoid valve cuts off the air path.

[0075] Preferably, the cylinder body of the pressing cylinder 4221 is hinged to the longitudinal beam 4220, and its piston rod is hinged to the housing of the pressing conveyor belt 410; wherein, the rotation center axes at both ends of the pressing cylinder 4221 are arranged perpendicularly, that is, one rotation center axis is in the front-back direction and the other rotation center axis is in the left-right direction, which can prevent over-positioning and ensure smooth assembly of the secondary pressing assembly 422.

[0076] The working process of the secondary drive mechanism 420 is as follows: First, the servo motor 4211 of the primary positioning component 421 operates, lowering the mounting bracket 4213, the entire secondary clamping component 422, and the pressing conveyor belt 410 to a position close to (e.g., 5-10mm from the upper surface of the box) via the lead screw and nut pair 4212. Then, the clamping cylinder 4221 is activated, driving the housing of the pressing conveyor belt 410 to descend slightly further until the box is clamped, after which the air supply is cut off. At this point, the actual pressure applied to the box is determined solely by the weight of the pressing conveyor belt 410, effectively preventing damage to the box due to excessive pressure. Furthermore, this structure allows the two secondary clamping components 422 on both sides to be controlled independently, meaning the two pressing conveyor belts 410 can clamp materials with highly differentiated pressure, solving the problem in existing technologies where inconsistent product heights within the box lead to over-pressure on one side or insufficient pressure on the other.

[0077] Furthermore, the fixed support 201 of the tape end smoothing unit 200 is preferably fixed to the outer wall of the housing of the pressing conveyor belt 410. This allows the smoothing unit to rise and fall and adjust laterally along with the pressing conveyor belt 410, always maintaining a suitable relative position with the upper surface of the housing.

[0078] like Figure 1 and Figure 2 As shown, the feeding unit 300 also includes two support conveyor belts 500, which are located directly below the pressing conveyor belts 410 in the two adaptive pressing mechanisms 400, respectively, for supporting and conveying the box from the bottom. During operation, the box is placed on the two support conveyor belts 500, and its top surface is pressed down by the two corresponding pressing conveyor belts 410 above, achieving stable conveying.

[0079] Furthermore, the lower end of the main guide column 4214 is fixed to the outer side of the housing of the support conveyor belt 500 on the same side via a fixed base (not shown in the figure). This allows the longitudinal beam 4220, the pressing conveyor belt 410, and the secondary pressing assembly 422 to be adjusted laterally together with the support conveyor belt 500, so that the pressing conveyor belt 410 is always located directly above the support conveyor belt 500.

[0080] To better close the box lid before sealing, such as Figure 4 As shown, a lid clamping mechanism 600 can be installed on the outer side of the support conveyor belt 500 (the side away from the center of the box). The lid clamping mechanism 600 includes a laterally movable pressure roller 601 and a drive device 602 (such as a cylinder or electric push rod) for driving the pressure roller 601 to move laterally. When the box enters, the drive device 602 pushes the pressure roller 601 inward, pressing the box cover inward from the outside to make it close better and facilitate tape sealing.

[0081] Furthermore, the drive unit 602 is fixed to the outer wall of the housing of the support conveyor belt 500 and is higher than the support conveyor belt 500. This allows the drive unit 602 to be adjusted laterally along with the support conveyor belt 500, always maintaining a suitable relative position with the housing.

[0082] To accommodate boxes of different widths, the carton sealing machine body 100 may also include an adjustable spacing unit 700. For example... Figure 1 , Figure 2 As shown, the pitch adjustment unit 700 includes a drive motor 701, a transmission assembly 702, and two sets of transversely arranged linear slide rails 703.

[0083] In this embodiment, the transmission assembly 702 is a synchronous belt set.

[0084] Of the two sets of transversely arranged linear slide rails 703, one set is fixedly installed at the bottom of the sealing machine body 100 to support the transverse sliding of the conveyor belt 500. Specifically, the housing supporting the conveyor belt 500 is slidably connected to this set of linear slide rails 703 via a slider (not shown in the figure). The other set is fixedly connected to the mounting frame 4213 for the transverse sliding of the longitudinal beam 4220. Specifically, the longitudinal beam 4220 is slidably connected to this set of linear slide rails 703 via a slider (not shown in the figure). That is, the servo motor 4211 drives the lead screw of the lead screw nut pair 4212 to rotate, thereby driving the corresponding mounting frame 4213 and linear slide rail 703 to precisely rise and fall along the main guide column 4214, and thus driving the longitudinal beam 4220 to precisely rise and fall along the main guide column 4214, thereby achieving coarse adjustment and precise positioning of the height of the pressing conveyor belt 410.

[0085] In one possible implementation, a drive motor 701 and a timing belt assembly are provided as a set; the drive motor 701 is mounted on the carton sealing machine body 100. The timing belt assembly includes a driving timing pulley, a driven timing pulley, and a closed-loop timing belt fitted thereon, with the timing pulleys at both ends rotatably mounted on the transverse sides of the carton sealing machine body 100. The upper side of the belt body of the timing belt assembly is fixedly connected to the housing of one of the supporting conveyor belts 500, and its lower side is fixedly connected to the housing of the other supporting conveyor belt 500. Preferably, the belt body of the timing belt assembly is fixedly connected to the housing of the supporting conveyor belts 500 respectively by belt clamps and bolts to ensure that the timing belt does not slip during operation.

[0086] When width adjustment is required, drive motor 701 starts, driving the synchronous belt assembly. Since the housings of the two support conveyor belts 500 are fixed to the two sides of the synchronous belt, and the fixing method ensures that the movement direction of one support conveyor belt 500 is opposite to the other, drive motor 701 can synchronously drive the two support conveyor belts 500 to move towards or away from each other along the linear guide rail 703. This allows the spacing between the two adaptive pressing mechanisms 400 to be adjusted synchronously and equidistantly, ensuring that the pressing and supporting positions are always aligned and matched for boxes of different widths.

[0087] In another possible implementation, two sets of drive motors 701 and synchronous belt sets are provided, and are connected one-to-one with the housings of the two supporting conveyor belts 500; that is, the upper side of the closed-loop synchronous belt of one set of synchronous belts is fixedly connected to the housing of one supporting conveyor belt 500 through belt clamps and bolts, and the upper side of the closed-loop synchronous belt of the other set of synchronous belts is fixedly connected to the housing of another supporting conveyor belt 500 through belt clamps and bolts.

[0088] Example 2: A short-side sealing machine. This example differs from Example 1 in the specific implementation of the primary positioning component 421. In this example, the servo motor 4211 and the lead screw and nut assembly 4212 can be replaced with other forms of linear drive equipment, such as electric cylinders or pneumatic cylinders. The cylinder body or frame of this linear drive equipment is mounted on the sealing machine body 100, and its telescopic end is fixedly connected to the mounting frame 4213, also guided by the main guide column 4214. Simultaneously, a mechanical limit switch is installed inside the housing of the pressing conveyor belt 410. Its working principle is that the mechanical limit switch controls the linear drive equipment to stop, allowing the linear drive equipment to achieve rapid and precise positioning over a large stroke. Then, a constant micro-pressure is provided by an independent secondary pressing component 422; that is, when the pressing conveyor belt 410 descends to contact the box, the switch is triggered, controlling the linear drive equipment to stop.

[0089] It should be noted that when a linear drive device uses a cylinder, the cylinder is connected to the air source through a solenoid valve (such as a three-position five-way solenoid valve).

[0090] In this embodiment, the transmission assembly 702 can be replaced by a synchronous belt assembly with a bidirectional lead screw and nut pair. The bidirectional lead screw of the bidirectional lead screw and nut pair is vertically mounted on the sealing machine body 100 via bearings. The two support conveyor belts 500 are respectively fixedly connected to the two nuts of the bidirectional lead screw and nut pair.

[0091] In this embodiment, the installation position of the lid clamping mechanism 600 is adjusted to be outside the pressing conveyor belt 410 and lower than the pressing conveyor belt 410. The installation position of the tape end smoothing unit 200 is adjusted to be outside the support conveyor belt 500.

[0092] Specifically, the installation positions of the lid clamping mechanism 600 and the tape end smoothing unit 200 are designed according to the position of the box sealing position relative to the box body, and no specific limitation is made here.

[0093] In other embodiments, a box cover clamping mechanism 600 and a belt end smoothing unit 200 are installed on the outer side of the pressing conveyor belt 410 and the outer side of the supporting conveyor belt 500.

[0094] Structures, components, and connection methods not described or detailed in this utility model are all prior art known to those skilled in the art unless otherwise specified. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalents of the claims within this utility model.

Claims

1. A short-side box sealing machine comprising a box sealing machine body (100), characterized in that, The sealing machine body (100) has a feeding unit (300) and a tape end smoothing unit (200); The feeding unit (300) comprises two adaptive pressing mechanisms (400) and a supporting conveyor belt (500) symmetrically arranged along the direction perpendicular to the box conveying direction, and the adaptive pressing mechanism (400) is used for adaptively pressing the box from above; The tape end smoothing unit (200) is installed outside the adaptive pressing mechanism (400) or the corresponding supporting conveyor belt (500), and comprises an oscillatable brush (205), through the counterclockwise or clockwise oscillation of the brush (205), the head end or tail end of the tape extending from the end of the box is pressed against the end face of the box.

2. The short end seamer of claim 1, wherein: The tape end smoothing unit (200) further comprises: a fixed support (201); a cylinder (202), the cylinder body of which is fixed to the fixed support (201) along the conveying direction of the box; a rack (203), which is fixed to the end of the piston rod of the cylinder (202) and is arranged in parallel with the extension direction of the piston rod; a gear (204), which is rotatably installed on the fixed support (201) through a first shaft and is engaged with the rack (203); The brush (205) is fixed to the first shaft, and the extension direction of the bristles is perpendicular to the axis of the first shaft.

3. The short end seamer of claim 2, wherein: The tape end smoothing unit (200) further comprises at least one guide wheel (206), which is rotatably installed on the fixed support (201) through a second shaft, and the flange face of the guide wheel (206) is in rolling contact with the tooth back face of the rack (203).

4. The short end seamer of claim 3, wherein: The gear (204) and at least one guide wheel (206) are symmetrically arranged about the rack (203).

5. The short end seamer of claim 1, wherein: The adaptive pressing mechanism (400) comprises a pressing conveyor belt (410) and a secondary driving mechanism (420) for driving the pressing conveyor belt (410) to lift; The secondary driving mechanism (420) comprises: a primary positioning assembly (421) for driving the pressing conveyor belt (410) to lift to a position close to the upper surface of the box; a secondary pressing assembly (422) connected between the output end of the primary positioning assembly (421) and the pressing conveyor belt (410) for providing a constant pressing force to the pressing conveyor belt (410).

6. The short end seamer of claim 5, wherein: The primary positioning assembly (421) comprises: a servo motor (4211) installed on the sealing machine body (100); a screw nut pair (4212), the screw rod of which is in transmission connection with the output shaft of the servo motor (4211); a mounting bracket (4213) fixedly connected with the nut of the screw nut pair (4212); a main guide column (4214), the secondary pressing assembly (422) is in sliding fit with the main guide column (4214).

7. The short end seamer of claim 6, wherein: The secondary pressing assembly (422) comprises: a longitudinal beam (4220) corresponding to the mounting bracket (4213) and in sliding fit with the main guide column (4214); At least one compression cylinder (4221) whose cylinder body is connected with the longitudinal beam (4220) and whose piston rod is connected with the material compression conveying belt (410); At least one vertical guide assembly (4222) whose fixed part is connected with the longitudinal beam (4220) and whose sliding part is connected with the material compression conveying belt (410).

8. The short end seamer of claim 1, wherein: The carton sealing machine body (100) further has a carton cover compression mechanism (600) which comprises a transversely movable compression roller (601) and a driving device (602) for driving the compression roller (601) to move transversely, and the driving device (602) is installed on the outside of the support conveying belt (500) or the adaptive material compression mechanism (400) corresponding thereto.

9. The short end seamer of claim 8, wherein: The carton sealing machine body (100) further has a distance adjusting unit (700) which comprises: A driving motor (701) installed on the carton sealing machine body (100); A transmission assembly (702) having two moving parts capable of moving synchronously towards or away from each other; Two sets of linear slide rails (703) arranged transversely and installed on the carton sealing machine body (100) correspondingly; Wherein, the driving motor (701) is configured to drive the transmission assembly (702) to operate, thereby driving the two adaptive material compression mechanisms (400) and the two support conveying belts (500) to move towards or away from each other along the respective corresponding linear slide rails (703), so as to realize the synchronous adjustment of the distance therebetween.

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