A simple tape sealing machine

Abstract

This utility model relates to the technical field of bag sealing and cutting equipment, and proposes a simple tape sealing machine suitable for supermarket and retail packing tables. The sealing machine consists of paired support plates forming a through-rotation groove at their upper ends. Rotatably mounted support components include a round shaft and a radial extension to support the tape roll. A vertical groove at the front end of the support plate serves as a restricted channel for feeding and cutting. On both sides of the channel are arranged a one-way ratchet stepping mechanism consisting of toothed pins / moving teeth and toothed wheels, and an embedded cutting mechanism consisting of a rocker arm blade holder, a pointed blade, and a return spring. A tailing bar with an arc-shaped protrusion and an auxiliary spring are provided on the other side of the blade holder to achieve overshoot assistance and anti-rebound. Optionally, a safety blade holder can be provided on the outside of the support plate for trimming / emergency cutting, and anti-slip rubber feet can be provided at the bottom to improve table stability.

Description

Technical Field

[0001] This utility model relates to the technical field of tape tying machines, specifically to a simple tape tying machine. Background Technology

[0002] Supermarkets, retail packing stations, and fresh produce pre-packaging workstations widely use tape to seal plastic bags and cut excess tape. Common practices include handheld tape holders with manual application, simple tabletop tape cutters, and small sealing machines. These devices typically rely on operators pulling the tape by hand to apply it, then cutting it with an exposed blade or simple cutter. While the structure is simple, it reveals a series of common problems in high-frequency operations and multi-shift use. Because the tape rolls are mostly supported by rigid shafts or simple rods, their axial and radial stability is insufficient, making them prone to swaying and rebound during pulling. The tape moves laterally within the feed channel, making it difficult to maintain consistent application positions, resulting in uneven seals and poor appearance. Some devices lack effective feed pitch limiting and one-way anti-reverse mechanisms, requiring operators to rely on experience to control the tape length. The feed rate varies from person to person, affecting not only the throughput per unit time but also causing material waste due to the tape being pulled back without being fully utilized.

[0003] In the cutting process, existing equipment generally uses fixed exposed blades or simple flip-up blade holders to complete the cutting. The blade edge lacks restricted guidance, and the cutting trajectory is affected by hand posture and instantaneous force, which easily leads to problems such as tearing, burrs, and uneven cuts. The blade is exposed for a long time in the standby state, which poses a risk of accidental activation during operation and placement. Moreover, the blade holder reset mostly relies on a single spring or manual return, and incomplete return can create a dangerous state of partially exposed blade. Coupled with spring fatigue under high-frequency use, this further amplifies the probability of jamming and accidental cutting. In order to compensate for the unreliable reset and the impact of springback, some devices have increased the spring force or the stroke length, but this significantly increases the force and wrist burden on the operator. For people working for long periods of time, the lack of comfort also increases the learning and adaptation costs for new operators.

[0004] Meanwhile, existing tabletop structures also have shortcomings in terms of equipment placement and workstation compatibility. The bottom is mostly made of hard feet or metal edges, offering limited anti-slip capability when facing different tabletops such as stainless steel, quartz stone, and wood. The entire machine is prone to displacement during pull-out or downward cutting, forcing the operator to use their other hand to support the machine. This not only reduces the cycle time but also increases the risk of misoperation and scratches in crowded checkout or packaging environments. In terms of maintenance, the main blade bears all cutting tasks. When encountering temporary trimming or emergency cuts, the main cutting mechanism must be repeatedly triggered, accelerating blade wear and making the working channel easily contaminated with debris and adhesive. This increases the frequency of cleaning and blade replacement, and downtime for maintenance has a significant impact on continuous front-end operations.

[0005] In summary, existing tape application and cutting devices used in supermarkets and other similar settings still have shortcomings in terms of tape feeding stability, repeatability of fixed length, cutting safety and cross-sectional quality, reliability of mechanism reset, and ease of equipment placement and maintenance. They are unable to simultaneously meet the comprehensive requirements of efficiency, quality consistency, and safety for high-frequency operations. There is an urgent need for an improved solution that offers greater control and a more human-friendly experience throughout the entire process of feeding, cutting, and reset. Utility Model Content

[0006] This utility model provides a simple tape tying machine.

[0007] To achieve the above objectives, this utility model provides the following technical solution, mainly including:

[0008] A simple tape-tying machine includes two opposing support plates. The upper end of each support plate has a vertically formed rotating groove that extends through the top of the support plate. A support member is provided between the two support plates. The support member includes a round shaft and multiple extensions that extend radially outward. The two ends of the round shaft are respectively located in the two rotating grooves.

[0009] The support plate has a vertical groove at its front end relative to the rotating groove. Along both sides of the vertical groove are toothed pins, toothed wheels, a rocker arm blade structure, and a tailing bar. The toothed pin has a movable tooth that engages with the toothed wheel. The rocker arm blade structure includes a rocker arm blade holder, a blade, a support column, and a tension spring. The rocker arm blade holder rotates up and down along the vertical groove about the support column, and the tension spring is used to reset after rotation. The tailing bar is installed on the other side of the rocker arm blade holder to assist in resetting.

[0010] In a specific embodiment, the actuating tooth rotates along the tooth position pin, and the tail end of the actuating tooth is provided with a tension spring II to assist the actuating tooth in resetting. The actuating range of the actuating tooth is the reciprocating motion of the vertical groove into the support plate.

[0011] In a specific embodiment, the top of the rocker arm knife holder is provided with a sharp blade, including the following states: State 1, when the bottom end of the rocker arm knife holder is located in the vertical groove, the sharp blade is located in the support plate; State 2, when the rocker arm knife holder is pushed down and a channel appears in the vertical groove, the sharp blade is located in the vertical groove, and at this time the sharp blade is used to cut the tape.

[0012] In a specific embodiment, the tail lever is generally crank-shaped, with a support column three at the tail end, and the tail lever is rotatably connected to the support column three; the top of the tail lever is provided with an arc-shaped protrusion to assist the rocker arm tip holder in resetting.

[0013] In one specific embodiment, a tension spring is provided at the tail end of the tail lever near the rocker arm tip holder.

[0014] In one specific embodiment, a safety blade holder is also provided on the outer side of the support plate, and a safety blade is installed on the safety blade holder.

[0015] In one specific embodiment, the bottom of the support plate is also provided with anti-slip rubber feet.

[0016] As can be seen from the above technical solution, compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This invention utilizes a through-rotation groove formed at the upper ends of two opposing support plates. The two ends of the circular shaft are embedded in the rotation groove and stabilized by radial extensions, ensuring uniform force on the axis and minimal sway during tape unwinding and rewinding. This results in low feed resistance and reduced risk of deviation and wrinkling, guaranteeing smooth tape pulling and neat adhesion during continuous bag sealing, significantly improving single-operation stability and overall cycle time. A vertical groove at the front end of the support plate serves as a limiting channel for feeding and cutting, coaxially cooperating with the internal mechanism to constrain the lateral movement and shearing trajectory of the tape. This ensures that the application position aligns with the shearing edge and is repeatable, resulting in a smooth and aesthetically pleasing sealing edge. This reduces rework and material waste, meeting the consistent appearance requirements of high-frequency bag sealing scenarios such as supermarkets.

[0018] In terms of feeding and length control, the movable teeth on the toothed pin mesh with the toothed wheel to form a one-way ratchet stepping structure. The operator can easily achieve stable feeding at a fixed angle and length with a light push. The movable teeth are automatically reset by the tension spring, avoiding rewinding and loosening of the tape, reducing reliance on operating skills, and enabling different shifts and novices to achieve consistent tape length and efficiency. The cutting mechanism adopts a rocker arm blade holder with a support column as the pivot, combined with the tension spring to achieve an embedded action of "only extending the blade when needed": when in standby mode, the blade is hidden in the support plate; when cutting, it is extended only in the vertical groove by the rocker arm to complete the cut. The blade is normally concealed and the blade is extended in a restricted manner, which takes into account both safety and cutting straightness, reducing the risk of accidental contact and ensuring a clean cut without tearing. To ensure a clean zero return during the cutting action, the tail lever adopts a crank-type arrangement with an arc-shaped protrusion at the top. This, along with the rocker arm return stroke, forms a cam-like guiding and pushing action. A tension spring is used to assist in overshooting and prevent rebound, thus preventing the tool holder from hovering with the tip partially exposed, which could cause safety hazards or jamming. This also improves the durability and rhythm consistency of the mechanism.

[0019] This practical system utilizes a three-spring system—"toggle tooth reset—tool holder reset—and finishing assist return"—to distribute the storage and release of elastic potential energy, avoiding single-point fatigue that could cause drift in feel and decrease in accuracy. Even under long-term, high-frequency operation, it maintains a light feel, short stroke, and stable zero return. The bottom anti-slip rubber feet provide reliable friction and micro-deformation adhesion to stainless steel, wood, or quartz surfaces, preventing machine displacement during the pulling and pressing cutting processes. This allows for stable one-handed operation, reducing accidental cuts and scratches caused by slippage. To adapt to special working conditions and maintenance needs, a safety blade holder added to the outside of the support plate allows for emergency cutting or trimming without triggering the main blade mechanism, reducing main blade wear and minimizing congestion in the core channel, thus improving equipment availability and maintenance convenience. The aforementioned structural synergy enables this utility model to achieve an integrated workflow of fixed-length feeding, restricted shearing, and rapid and reliable reset under the premise of no power supply and low cost. It significantly shortens the sealing action chain and micro-pause time, increases the throughput per unit time, reduces material waste caused by tape idling and retraction, and meets the practical needs of supermarkets and other scenarios for rapid sealing, tape application, and tape cutting operations with higher safety, stability, and ease of maintenance. Attached Figure Description

[0020] 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 This is a front view of the structural diagram of this utility model;

[0022] Figure 2 The reverse side is a structural schematic diagram of this utility model;

[0023] Figure 3 This is a schematic diagram of the internal structure of this utility model. Detailed Implementation

[0024] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] Example 1:

[0026] This embodiment provides a simple tape tying machine, which includes two opposing left and right support plates 1. The upper end of the support plate 1 is vertically provided with a rotating groove 11 along its thickness direction. The rotating groove 11 passes through the top of the support plate 1 to form an axial installation channel. A support member 6 is provided between the two support plates 1. The support member 6 is composed of a round shaft portion 61 and several extension portions 62 extending radially outward along the round shaft portion 61. The two ends of the round shaft portion 61 are respectively placed into the rotating groove 11 of the two support plates 1 and can rotate therewith low friction. The extension portions 62 are used to limit and support the tape roll, so that the axis of the tape roll remains coaxial and stable during the feeding process. The support plate 1 is provided with a vertical groove 12 at the front end of the rotating groove 11. The vertical groove 12 is arranged in the same direction as the belt feed and cut-off direction to form a restricted feeding and cutting channel. Toothed locking pins 2 and toothed wheels 3, as well as adjacent rocker arm blade structure 4 and tailing bar 5 are installed in sequence along both sides of the vertical groove 12, so as to complete the fixed-distance feeding and controlled cutting of the belt in the same restricted channel.

[0027] A toggle tooth 21 is pivotally mounted on the toothed pin 2. The toggle tooth 21 can move up and down in the direction of the vertical groove 12 around the rotation axis of the toothed pin 2. Its tail end is connected to the inner side of the support plate 1 through the tension spring 22 to provide a reset elastic force. The tooth surface of the toggle tooth 21 meshes with the outer tooth ring of the toothed wheel 3. When the operator moves the toggle tooth 21 downward, it drives the toothed wheel 3 to step forward at a preset angle. After releasing the hand, the toggle tooth 21 moves upward and disengages under the action of the tension spring 22 and returns to the waiting position, realizing the one-way ratchet feeding of "push-self-locking-reset". The rocker arm knife structure 4 includes a rocker arm knife holder 41 hinged to the support plate 1 with the support column 43 as the axis. The upper end of the rocker arm knife holder 41 is fixed with a sharp blade 42, and its lower end is connected to the support plate 1 through a tension spring 44. When the rocker arm knife holder 41 is in the upper stop position, the sharp blade 42 is completely retracted into the inner cavity of the support plate 1 and is not exposed. When the operator presses down on the rocker arm knife holder 41, the sharp blade 42 is exposed along the restricted channel of the vertical groove 12 and forms a shearing engagement with the tape clamped in the channel to achieve straight cutting. After the external force is released, the sharp blade 42 retracts into the plate under the traction of the tension spring 44. The tailing lever 5 is located on the other side of the rocker arm tip structure 4. The tailing lever 5 is arranged in a crank-like manner, and its tail end is rotatably connected to the support plate 1 through the support column 3 51. The upper end of the tailing lever 5 is machined with an arc-shaped protrusion 52. The arc-shaped protrusion 52 contacts its side at the end of the return stroke of the rocker arm tip holder 41, forming a cam-follower-like guiding and pushing relationship to overcome the stroke attenuation at the end of the rebound of the tension spring 44, so that the rocker arm tip holder 41 can reliably overshoot and return to the upper stop position. In order to further ensure a clean and neat return to zero, the tail end of the tailing lever 5 is also connected to the side of the rocker arm tip holder 41. The tension spring 3 53 provides auxiliary return force and suppresses the rebound of the mechanism. In order to meet the needs of on-site safe trimming or emergency cutting, a safety blade seat 7 is added to the outside of the support plate 1. The safety blade seat 7 can be detachably mounted on the safety blade seat 7. The safety blade 71 is used separately from the main cutting channel to reduce the wear and blockage risk of the tip blade 42. To improve the stability of the machine, anti-slip rubber feet 8 are evenly distributed on the bottom of the support plate 1. When the anti-slip rubber feet 8 come into contact with the stainless steel tabletop, quartz stone tabletop or wooden tabletop, they provide reliable friction and suppress the displacement of the whole machine through micro-deformation adsorption.

[0028] The assembly method of this embodiment is as follows: First, place both ends of the round shaft 61 of the support member 6 into the rotating groove 11 of the left and right support plates 1 and limit them with retaining rings or end plugs. Install the toothed wheel 3 on the rotating shaft seat on the inner side of the support plate 1 so that it meshes with the actuating tooth 21. Then, hinge the rocker arm tip knife holder 41 to the inner side of the support plate 1 with the support column 1 43 and fix the tip knife 42. Then connect the tension spring 1 44, tension spring 22 and tension spring 3 53 respectively. Assemble the tailing bar 5 and realize the rotational connection with the support column 3 51. Finally, fix the safety knife holder 7 and the safety knife 71 on the outer side of the support plate 1 and press the anti-slip rubber feet 8 into the bottom of the support plate 1 to complete the final assembly. In use, the operator first places the tape roll onto the extension 62 of the support 6 to form a stable support, guides the tape through the front end of the vertical groove 12, and makes the tape cross the guide surface of the toothed wheel 3 as needed; then, the operator flicks the toothed wheel 21 downwards several times with their fingers to make the toothed wheel 3 step forward and drive the tape to feed forward at a fixed distance. After the bag opening is covered, the operator presses down on the rocker arm blade holder 41, and the blade 42 is sharpened in the vertical groove 12 to complete the straight cut. After release, the blade holder quickly returns to zero under the synergistic action of tension spring 44, arc-shaped protrusion 52, and tension spring 53. The entire "feeding-covering-cutting-resetting" action chain is completed in the restricted channel. The feed length is repeatable, the cross-section is flat, and the blade edge is not exposed in normal conditions, which is suitable for high-frequency continuous operation of supermarket packing tables.

[0029] Example 2:

[0030] Based on the above embodiment one, the length accuracy and maintenance convenience are further optimized. The toothed wheel 3 adopts a replaceable toothed ring structure, and the module and number of teeth of the toothed ring can be changed to match different bag opening circumferences and target tape lengths. In order to improve the feel and life of the lever, the tension spring 22 is replaced with a torsion spring type reset component and is set in the rotating shaft sleeve of the tooth position pin 2. The pre-torque of the torsion spring is adjusted by the limit hole in stages to adapt to different operators' force preferences and shift conditions. The rocker arm knife holder 41 and the knife blade 42 adopt a drawer-type pressure plate clamping structure. The knife blade 42 can be pulled out from the side opening of the vertical slot 12 for replacement and cleaning without disassembling the rocker arm knife holder 41, thus shortening maintenance downtime. To enhance tabletop adaptability, in addition to the anti-slip rubber feet 8, an adhesive micro suction cup pad can be optionally installed on the bottom of the support plate 1. When the work surface is made of high-gloss hard stone, the suction cup pad is used to obtain stronger anti-displacement capability; when the work surface is made of wood or brushed stainless steel, the anti-slip rubber feet 8 are replaced to obtain better damping feel. The rest of the structure and working process are the same as in Embodiment 1. By using replaceable toothed rings and torsion spring pre-torque settings, the repeatability of fixed-distance feeding is further improved, and the convenience of maintenance is significantly enhanced. The whole machine is more suitable for retail environments with multiple bag sizes and multiple job rotations.

[0031] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0032] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A simple tape tying machine, comprising two opposing support plates, wherein a rotating groove is vertically formed at the upper end of the support plate and the rotating groove passes through the top of the support plate, and a support member is provided between the two support plates, the support member comprising a round shaft portion and a plurality of extension portions connected radially outward therefrom, wherein the two ends of the round shaft portion are respectively located in the two rotating grooves. Its features are, The support plate has a vertical groove at its front end relative to the rotating groove. Along both sides of the vertical groove are toothed pins, toothed wheels, a rocker arm blade structure, and a tailing bar. The toothed pin has a movable tooth that engages with the toothed wheel. The rocker arm blade structure includes a rocker arm blade holder, a blade, a support column, and a tension spring. The rocker arm blade holder rotates up and down along the vertical groove about the support column, and the tension spring is used to reset after rotation. The tailing bar is installed on the other side of the rocker arm blade holder to assist in resetting.

2. The sealing machine according to claim 1, characterized in that, The actuating tooth rotates along the tooth position pin, and the tail end of the actuating tooth is provided with a tension spring II to assist the actuating tooth in resetting. The actuating range of the actuating tooth is the reciprocating motion of the vertical groove into the support plate.

3. The sealing machine according to claim 1, characterized in that, The top of the rocker arm knife holder is equipped with a sharp blade, including the following states: State 1, when the bottom of the rocker arm knife holder is located in the vertical groove, the sharp blade is located in the support plate; State 2, when the rocker arm knife holder is pushed down and a channel appears in the vertical groove, the sharp blade is located in the vertical groove, and at this time the sharp blade is used to cut the tape.

4. The sealing machine according to claim 1, characterized in that, The tail lever is generally crank-shaped, with a support column three at the tail end, and the tail lever is rotatably connected to the support column three; the top of the tail lever is provided with an arc-shaped protrusion to assist the rocker arm tip holder in resetting.

5. The sealing machine according to claim 4, characterized in that, A tension spring is installed at the end of the tail lever near the rocker arm tip holder.

6. The sealing machine according to claim 1, characterized in that, A safety blade holder is also provided on the outer side of the support plate, and a safety blade is installed on the safety blade holder.

7. The sealing machine according to claim 1, characterized in that, The bottom of the support plate is also equipped with anti-slip rubber feet.

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