A device for tying plastic bag openings with adhesive tape after the openings are bundled

Abstract

The present invention discloses a device for tying plastic bags with adhesive tape after the openings are bundled, comprising a shell provided with a tying channel, the shell being provided with an adhesive tape wheel, a rotating wheel, a pressure plate and a knife group, the end face of the rotating wheel covering the tying channel, a binding groove being provided at the upper end and a protrusion being provided at the lower end, a rebound coil spring being provided on the pivotal end of the rotating wheel and the shell, a knife group being provided at the front end of the protrusion for docking, a cutting blade passing through the tying channel, a matching contour end face being provided on one side of the pressure plate, and an elastic connection to a tensioning spring being provided on the other side, the shell being further provided with a lever reset assembly, a lever portion being provided extending out of the tying channel, and a limit portion being provided to form an elastic limit with the protrusion. The product design of the present invention has an integrated rotating wheel with a coil spring and a knife group, the rotating wheel and the pressure plate being in contact to achieve tape winding, the knife group being provided to cut the tape by the rebound potential energy of the coil spring to achieve the tape sealing function, the overall structure being simple and compact, the operation being convenient and quick, and the cost being low so that it can be directly installed on a trash can for use and replacement.

Description

Technical Field

[0001] The invention relates to the technical field of packaging devices, in particular to a device for tying plastic bag openings with adhesive tape after the openings of the plastic bags are bundled. Background Art

[0002] At present, plastic bags are generally sealed by wrapping tape. The main problem is that a lot of force is required when pushing the plastic bag tightened with tape towards the bottom of the sealing machine. Moreover, the tape is easy to fall off from the slide and cannot seal the opening of the bundled plastic bag. In addition, the existing tape tying device is generally large in structure and occupies a large volume. For scenes that need to be applied to plastic bag sealing, such as sealing garbage bags in trash cans, the current method is still mostly manual tying. However, the stolen goods in the trash can usually have an odor, and the operator may feel uncomfortable when manually tying the garbage bag. However, there is no great need to specially equip a bulky tape tying device. Therefore, there is an urgent need for a tape tying device that is simple and compact in structure, easy and quick to operate, and can be directly installed on the trash can to solve the above problems. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to address the deficiencies of the above-mentioned prior art and provide a tape tying device which has a simple and compact structure, is easy and quick to operate and can be directly installed on a trash can after the openings of plastic bags are bundled.

[0004] The tool box is connected to the bag to be sealed, and the tool box is connected to the bag to be sealed. The surface of the knife assembly forms an abutment with the rotating wheel, and the other side is elastically connected to the tensioning spring pivoted to the shell. The shell is also provided with a lever reset assembly, and the lever reset assembly is provided with a lever portion extending from the tying channel at the lower end of the knife assembly installation position, and a limiting portion is provided to cooperate with the convex block that is rotated into place to form an elastic limit. Based on the setting of the rebound spring, the knife assembly is integrally arranged at the lower end of the rotating wheel, and the bundle end of the plastic bag is connected to the bundle groove end of the rotating wheel and the tape end, and moves downward along the tying channel. During the process, the wheel is driven to rotate, and the corresponding ends of the wheel and the pressure plate are in contact with the end of the bundle at the opening of the plastic bag to realize the winding of the tape on the bundle. At the same time, the rebound spring stores rebound potential energy. After the wheel rotates to the right position, the protrusion of the wheel and the limit part realize elastic limit to stop the rotation of the wheel, and the operating bundle continues to move downward along the tying channel to move the toggle part in the toggle lever reset assembly, so that the wheel and the limit part are separated and rotated under the influence of the rebound spring potential energy, so that the knife group rotates to cut the tape and realize the overall tape sealing.

[0005] As a further solution: the mating end of the pressure plate and the rotating wheel is arranged to be an arc-shaped end face extending outward, and the lower end of the arc-shaped end face abuts against the front end of the rotating wheel protrusion. The lower end of the pressure plate is also provided with a cutting notch, and the end of the cutting notch is arranged at a vertical positive cutting angle with the cutting blade of the knife group. The setting of the arc-shaped end face allows the docking end of the rotating wheel to smoothly rotate downward along the arc-shaped end face of the pressure plate and adhere the tape. At the same time, the setting of the cutting notch allows the pulled-down tape to achieve a certain degree of adhesion at both ends of the cutting notch, so that the knife group can cut the tape more smoothly when it rebounds under the influence of the elastic potential energy of the rebound coil spring.

[0006] As a further solution: the bundle opening groove is set as an arc-shaped opening groove, and the rotating wheel end at the lower end of the bundle opening groove is provided with a flat glue end portion, and the lower end of the flat glue end portion forms a clamping portion relative to the rotating arc. The design of the flat glue end portion can abut against the arc-shaped end surface during rotation, and the clamping portion can also smoothly press the tape tightly during rotation.

[0007] As a further solution: the two ends of the cutting groove form an upper end head and a lower end head, the upper end head is connected to the lower end of the arc-shaped end face, and one side edge of the upper end head and the lower end head is provided with a staggered guide convex edge. The upper end head and the lower end head can realize the pulling down of the tape to form a certain adhesive positioning, and the guide convex edge makes the tape flat, which is convenient for cutting by the knife group.

[0008] As a further solution: a baffle boss is provided on the pivotal end of the pressure plate and the shell, and a limit block is provided at the shell end. The baffle boss setting of the pressure plate can prevent the pressure plate from excessively rotating outward due to the elastic force of the tensioning spring, thereby squeezing into the restraint groove and making the wheel unable to reset.

[0009] As a further solution: the mating end of the protrusion of the rotating wheel and the pressure plate is provided with an inward-retracted step convex edge, and a knife group mounting groove is provided on the protrusion. The knife group is mated in the knife group mounting groove. The setting of the step convex edge can facilitate the smooth and flat guidance of the tape by the guiding convex edge.

[0010] As a further solution: the knife group is configured as a multi-needle eyebrow knife composed of multiple eyebrow needles of different lengths arranged in a row in a tight order of length. The multi-needle eyebrow knife has multiple eyebrow needles to pierce the tape, which is not easy to slip, so that multiple puncture holes are formed on the end surface of the tape to facilitate cutting of the entire tape.

[0011] As a further solution: the toggle rod part is set as a toggle pull rod, and the limiting part is set as a docking pull arm. One side of the toggle pull rod extends outward to block the lower end of the tying channel, and the other end is pivotally connected with the shell and is provided with a toggle boss to cooperate with the end of the docking pull arm. The middle part is provided with a connecting spring that docks with the shell. The middle part of the docking pull arm is pivotally connected to the shell and is provided with a connecting spring that docks with the shell. The lower end is docked with the toggle boss, and the upper end is provided with a limiting hook body. The end of the wheel protrusion is provided with a limiting groove, and the limiting groove can form a limiting clamping connection with the limiting hook body.

[0012] As a further solution: a notch hole is provided at the bottom end of the tying channel, and the notch hole is located at the lower end of the toggle pull rod. The setting of the notch hole allows the plastic bag openings to be smoothly taken out of the bundle.

[0013] As a further solution: the shell is configured to be an outer base plate and an inner base plate that can be spliced ​​together to form a box. The outer end of the outer base plate is formed by combining the inner base plate and a notch groove that is biased inward along the outline of the base plate. The two side edges of the inner base plate in the inner block are provided with limiting convex edge strips to facilitate the connection and limitation of the shell with the docking product such as a trash can.

[0014] Compared with the prior art, the beneficial effects of the present invention are: the product design of the present invention has an integrated rotating wheel with a coil spring and a knife group, and the tape is wound by the contact between the rotating wheel and the pressure plate. The knife group cuts the tape by the rebound potential energy of the coil spring to achieve the tape sealing function. The overall structure is simple and compact, the operation is convenient and fast, and the cost is low, so it can be directly installed on the trash can for use and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention.

[0016] Figure 2 Schematic diagram of the internal initial state structure of an embodiment of the present invention.

[0017] Figure 3 Schematic diagram of the internal tying state structure of an embodiment of the present invention.

[0018] Figure 4 Schematic diagram of the three-dimensional structure of the rotating wheel according to an embodiment of the present invention.

[0019] Figure 5 It is a schematic diagram of the three-dimensional structure of the pressing plate according to an embodiment of the present invention.

[0020] exist Figures 1 to 5 In: outer base plate 1, inner base plate 2, rotating wheel 3, pressure plate 4, rebound coil spring 5, knife group 6, tensioning spring 7, toggle pull rod 8, docking pull arm 9, connecting tension spring 10, tape wheel 11, tape roll 12, tying channel 13, notch hole 14, tape 18, notch groove 21, limiting convex edge strip 22, tie mouth groove 31, protrusion 32, flat end portion 33, limiting groove 34, knife group mounting groove 35, step convex edge 36, arc-shaped end face 41, cutting notch 42, baffle boss 43, upper end head 44, lower end head 45, guide convex edge 46, toggle boss 81, limiting hook body 91. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See Figures 1 to 5The embodiment of the present invention is a device for tying a plastic bag with a tape after the opening is bundled, which is provided with a shell with a tying channel 13. The outside of the shell is provided with an outer base plate 1 and an inner base plate 2 which can be spliced ​​together to form a box, and the outer base plate 1 and the inner base plate 2 are combined to form an outer end with a notch groove 21 offset inward along the base plate contour, and the two end edges of the inner base plate 2 in the inner block are provided with limiting convex edge strips 22, which are convenient for the shell to be clamped and limited with the docking product such as a trash can; the inside of the shell is provided with a tape wheel 11 for installing the tape roll, and the tape roll 12 can be sleeved on the outer end of the tape wheel 11. When in use, the tape roll 12 can be rotated to feed the material, and then a rotating wheel 3 for driving the tape to rotate, a pressing plate 4 abutting against the rotating wheel to tie the plastic bag and a knife group 6 for cutting the tape are further provided at the inner end of the shell near the tying channel 13.

[0023] The rotating wheel 3 and the pressure plate 4 are respectively arranged on the opposite sides of the tying channel, and the rotating wheel is arranged as a rotatable disk and is pivoted to the end of the shell near the tying channel in the middle. Part of the end face of the rotating wheel covers the tying channel, wherein the end of the rotating wheel at the upper end of the tying channel is provided with a tie groove 31, and the end of the rotating wheel at the lower end of the tying channel is provided with a protrusion 32. A rebound coil spring 5 is provided on the pivotal end of the rotating wheel and the shell, and a knife group 6 is docked at the front end of the protrusion 32, and the cutting edge passes through the tying channel 13.

[0024] The pressure plate 4 is pivoted to the end of the shell on the opposite side of the rotating wheel, one side is provided with a matching contour end face to form an abutment with the rotating wheel, and the other side is elastically connected to the tensioning spring pivoted to the shell. The shell is also provided with a lever reset assembly, the lever reset assembly is provided with a lever portion extending from the tying channel at the lower end of the knife group installation position, and a limiting portion is provided to cooperate with the convex block that has been rotated into place to form an elastic limit, wherein the lever portion is provided as a toggle pull rod 8, and the limiting portion is provided as a docking pull arm 9. The toggle pull rod 8 is turned to the left on one side. It extends outward to block the lower end of the tying channel, and the other side end is pivotally connected with the shell and is provided with a toggle boss 81 to cooperate with the end of the docking pull arm 9. The middle part is connected with a connecting tension spring 10 that docks with the shell, and the middle part of the docking pull arm is pivotally connected to the shell, and is provided with a connecting tension spring 10 that docks with the shell. The lower end is docked with the toggle boss 81, and the upper end is provided with a limiting hook body 91. In addition, a limiting groove 34 is provided at the end of the rotating wheel protrusion, wherein the limiting groove 34 can form a limiting card connection with the limiting hook body 91.

[0025] The mating ends of the pressure plate 4 and the runner 3 are arranged to form an arc-shaped end face 41 extending outward, and the lower end of the arc-shaped end face abuts against the front end of the runner protrusion, and the lower end of the pressure plate 4 is also provided with a cutting notch 42. The end of the cutting notch 42 is arranged at a vertical positive cutting angle with the cutting blade of the knife group. The setting of the arc-shaped end face 41 allows the docking end of the runner to smoothly rotate downward along the arc-shaped end face of the pressure plate and adhere the tape. At the same time, the setting of the cutting notch 42 allows the pulled-down tape to achieve a certain degree of adhesion at both ends of the cutting notch, so that the knife group can more smoothly cut the tape when it rebounds under the influence of the elastic potential energy of the rebound coil spring.

[0026] In addition, in this embodiment, the tie slot 31 is configured as an arc-shaped opening slot, and the rotating wheel end at the lower end of the tie slot is provided with a flat end portion 33. The lower end of the flat end portion 33 forms a pressing portion relative to the rotating arc. The flat end portion 33 is designed to abut against the arc-shaped end surface 41 during rotation, and the pressing portion can also smoothly press the tape tightly during rotation. In addition, the two ends of the cutting slot in this embodiment form an upper end 44 and a lower end 45, wherein the upper end 44 is connected to the lower end of the arc-shaped end surface 41. The upper end 44 and the lower end 45 are provided with a staggered guide ridge 46 on one side. The upper end and the lower end can realize the downward pulling of the tape to form a certain adhesive position. The guide ridge keeps the tape flat, which is convenient for cutting by the knife assembly. In addition, in this embodiment, a baffle boss 43 is provided on the pivotal end of the pressure plate 4 and the shell, and a limit block is provided on the corresponding shell end. The baffle boss 43 of the pressure plate can prevent the pressure plate from rotating outward excessively due to the elastic force of the tensioning spring 7, thereby squeezing into the bundle groove 31 and making the wheel unable to reset.

[0027] In addition, the protrusion 32 of the rotating wheel in this embodiment is provided with an inward-retracted step convex edge 36 at the mating end of the pressure plate, and a knife group mounting groove 35 is provided on the protrusion. The knife group is matched and arranged in the knife group mounting groove 35. The setting of the step convex edge 36 can facilitate the smooth and flat guidance of the tape by the guiding edge.

[0028] The knife group 6 in this embodiment is configured as a multi-needle eyebrow knife composed of multiple eyebrow needles of different lengths arranged in a row and tightened in order of length. The multi-needle eyebrow knife is used because it has multiple eyebrow needles to poke the tape, which is not easy to slip, so that multiple puncture holes are formed on the end surface of the tape to facilitate the cutting of the entire tape; in addition, the bottom end of the tying channel 13 in this embodiment is provided with a notch hole 14, and the notch hole 14 is located at the lower end of the toggle rod. The setting of the notch hole allows the plastic bag opening bundle to be taken out smoothly.

[0029] An embodiment of the present invention is applied to the design of a trash can, in which a notch is provided on the upper end of the opening of the trash can, and the product of this embodiment is snapped into the notch, and an end cover is provided at the upper end of the opening of the trash can to facilitate limiting the garbage bag, and a convex portion is extended from the rear end of the trash can, in which a garbage bag roll can be provided, and multiple pairs of symmetrical classification grooves are evenly provided on the ends of both sides of the opening of the trash can, and the classification grooves can be used to snap the bag openings of the garbage bags into so that the overall trash can forms multiple classification cavities.

[0030] The principle of the present invention is as follows: the product design of the present invention has a rotating wheel 3 with a coil spring and a knife group as an integral part, and the rotating wheel 3 and the pressure plate 4 are in contact with each other through the action of the rebound coil spring 5 and the tensioning spring 7 to realize the winding of the tape, and the knife group 6 cuts the tape by the action of the rebound potential energy of the coil spring to realize the tape sealing function. During production and assembly, the tape roll 12 needs to be installed on the tape wheel 11, and the front end tape 18 is pulled out. The column structure and the rotating wheel 3 and the pressure plate 4 are pre-set with the adhesive surface outward along the inner end of the integral shell. The tape 18 extends to the tail end of the arc-shaped end surface 41 in the pressure plate 4. At this time, the adhesive surface of the tape 18 is facing the inlet at the upper end of the tying channel. At this time, the device is as follows Figure 2 The tape 18 is then brought into contact with the end of the bag and the tape 18 is brought into contact with the end of the bag. Figure 3 As shown, the limit groove 34 and the limit hook body 91 set in the rotating wheel protrusion 32 realize elastic limit to stop the rotation of the rotating wheel, wherein the operating bundle continues to move downward along the tying channel to escape from the bundle groove 31, and is squeezed by the flat end 33 of the glue and the end of the pressure plate 4 to form a glued seal at the tail end of the last bundle, and continues to move downward to the toggle lever reset assembly. The toggle pull rod 8 rotates downward, driving the docking pull arm 9 to rotate, so that the limit groove 34 is disengaged from the limit hook body 91, and the rotating wheel 3 is affected by the potential energy of the rebound spring to rotate rapidly, so that the knife group 6 rotates to cut the tape to realize the overall tape sealing work, and forms a reserved tape 18 and the end of the pressure plate 4 to form a side adhesive end for the next tying action, achieving the advantages of simple and compact overall structure, convenient and fast operation and low cost.

[0031] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A device for tying the openings of plastic bags after they have been bundled, comprising a housing provided with a tying passage, the housing being provided with a tape wheel for mounting a tape roll, and further provided adjacent to the tying passage with a rotating wheel for driving the tape to rotate, a pressure plate abutting the rotating wheel to tie the openings of the plastic bags, and a knife assembly for cutting the tape, the rotating wheel and the pressure plate being respectively provided on opposite sides of the tying passage, characterized in that: The rotating wheel is provided as a whole with a rotatable disk body and is pivotally connected in the middle to the end of the shell near the tying channel, and part of the end surface of the rotating wheel covers the tying channel, wherein the end of the rotating wheel at the upper end of the tying channel is provided with a tie groove, and the end of the rotating wheel at the lower end of the tying channel is provided with a protrusion, and a rebound coil spring is provided on the pivotal end of the rotating wheel and the shell, and the knife group is docked at the front end of the protrusion, and the cutting edge passes through the tying channel. The pressure plate is pivotally connected to the end of the shell on the opposite side of the rotating wheel, and a matching contour end surface is provided on one side to form an abutment with the rotating wheel, and the other side is elastically connected to the tensioning spring pivotally connected to the shell. The shell is also provided with a lever reset assembly. The lever reset assembly is provided with a tying channel extending from the lever portion at the lower end of the knife group installation position, and is provided with a limiting portion that can cooperate with the protrusion that has been rotated into position to form an elastic limit; the mating end of the pressure plate and the rotating wheel is arranged to be an arc-shaped end face extending outward, and the lower end of the arc-shaped end face abuts the front end of the rotating wheel protrusion, and the lower end of the pressure plate is also provided with a cutting groove, and the end of the cutting groove is arranged at a vertical positive cutting angle with the cutting edge of the knife group; the tape roll is installed on the tape wheel, and the front end tape is pulled out, and the pre-setting is implemented with the column structure and the rotating wheel and the pressure plate arranged along the inner end of the overall shell with the tape surface outward, and the tape extends to the tail end of the arc-shaped end face in the pressure plate.

2. The device for tying the openings of plastic bags after bundling them with adhesive tape according to claim 1, characterized in that: The tie opening groove is arranged as an arc-shaped opening groove, and the rotating wheel end at the lower end of the tie opening groove is provided with a rubber flat end portion, and the lower end of the rubber flat end portion forms a pressing portion relative to the rotating arc.

3. The device for tying the openings of plastic bags after bundling them with adhesive tape according to claim 2, characterized in that: The two ends of the cutting notch form an upper end head and a lower end head, the upper end head is connected to the lower end of the arc-shaped end face, and one side edge of the upper end head and the lower end head is provided with a staggered guiding convex edge.

4. The device for tying plastic bags with adhesive tape after bundling the bags according to claim 1, characterized in that: A baffle boss is provided on the pivotal end portion of the pressure plate and the shell, and a limit stop block is provided at the end of the shell.

5. The device for tying plastic bags with adhesive tape after bundling the bags according to claim 2, characterized in that: The mating end of the protrusion of the rotating wheel and the pressure plate is provided with an inward-retracted step convex edge, and a knife group mounting groove is provided on the protrusion, and the knife group is matched and arranged in the knife group mounting groove.

6. The device for tying plastic bags with adhesive tape after bundling the bags according to claim 5, characterized in that: The knife group is configured as a multi-needle eyebrow knife consisting of a plurality of eyebrow needles of different lengths arranged in a row in a tight arrangement order of length.

7. The device for tying plastic bag openings with adhesive tape after bundling the bag openings according to any one of claims 1 to 6, characterized in that: The toggle lever portion is configured as a toggle pull rod, and the limiting portion is configured as a docking pull arm. One side of the toggle pull rod extends outward to block the lower end of the tying channel, and the other end is pivotally connected to the shell and is provided with a toggle boss that cooperates with the end of the docking pull arm. The middle part is provided with a connecting tension spring that docks with the shell. The middle part of the docking pull arm is pivotally connected to the shell and is provided with a connecting tension spring that docks with the shell. The lower end is docked with the toggle boss, and the upper end is provided with a limiting hook body. The end of the rotating wheel protrusion is provided with a limiting groove, and the limiting groove can form a limiting clamping connection with the limiting hook body.

8. The device for tying plastic bags with adhesive tape after bundling the bags according to claim 7, characterized in that: A notch hole is provided at the bottom end of the tying channel, and the notch hole is located at the lower end of the toggle pull rod.

9. The device for tying plastic bags with adhesive tape after the bags are bundled according to claim 7, characterized in that: The shell is configured as an outer base plate and an inner base plate that can be spliced ​​together to form a box. The outer end of the outer base plate and the inner base plate are combined to form a notch groove that is biased inward along the base plate contour. The two side ends of the inner base plate in the inner block are provided with limiting convex edge strips.

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