Rubber band conveying and opening mechanism for bundling plastic bags

Abstract

The invention provides a rubber band conveying and opening mechanism for bundling plastic bags, which belongs to the technical field of packaging and conveying machinery and comprises an opening assembly, a supporting rod assembly, a rubber band cutting assembly, an automatic conveying assembly and a material guiding and conveying component. The rotary arm can be driven to form opening and closing actions through sliding fit formed by the shifting sliding column and the shifting sliding groove, and the purpose of opening a rubber band can be achieved by matching with the supporting rod assembly which is elastically and rotationally connected with the head end of the rotary arm; after a rubber band pipe material is cut through the rubber band cutting assembly, the cut rubber band can form certain falling potential energy in cooperation with conveying of the automatic conveying assembly, and the rubber band automatically slides to the position between the outer face of a supporting rod and the top end of a separating and combining connecting base after the rubber band is located at the rotating position of a material guiding inclined hopper and the position right opposite to the supporting rod; along with the opening action of the supporting rod, the material guiding inclined hopper can be rotated to the position where binding is not interfered, and the rubber band can be automatically released for binding after the separating and combining connecting base makes contact with the inner ring of the inner rotating sleeve.

Description

Technical Field

[0001] The invention relates to the technical field of packaging conveying machinery, in particular to a rubber band conveying and opening mechanism for bundling plastic bags. Background Art

[0002] Plastic bags are commonly used in daily life and often need to be bundled after production for storage and transportation in batches. However, many occasions still rely on manual bundling with rubber bands, which is inefficient and difficult to ensure the tightness and consistency of the bundling. Long-term manual operation can easily lead to worker fatigue, increase the risk of work-related injuries, and is difficult to cope with large-scale demand.

[0003] Although the strapping equipment used by existing factories and enterprises has a high degree of automation and improves work efficiency, most of the equipment is costly and has a complex structure. Summary of the invention

[0004] The purpose of the present invention is to provide a rubber band conveying and stretching mechanism for bundling plastic bags, which is based on the rotational cooperation between the inner rotating sleeve and the cross rotating seat. By screwing the array of rotary arms to the bottom end of the cross rotating seat, the rotational action of the inner rotating sleeve can drive the rotary arm and the support rod assembly to form an opening and closing action, and through the coordinated transmission formed with the material guiding and conveying component mechanism, and at the same time utilizing the elastic rotational connection formed by the split-and-close connecting seat at the bottom end of the support rod and the rotary arm, not only can the stretching action before the rubber band is tied be automatically realized, but also the quick release action of the rubber band after it is stretched can be realized by using a simple structure.

[0005] The object of the present invention is achieved through such a technical solution, a rubber band conveying and stretching mechanism for bundling plastic bags, comprising a stretching assembly, a bracket support rod assembly and a material guide conveying member, the stretching assembly comprises a cross rotating seat and an inner rotating sleeve, the support rod assembly comprises a separation and combination connecting seat, a support rod and a separation and combination spring sheet, and the material guide conveying member comprises a bottom arm and an active rotating gear; The inner rotating sleeve is rotatably connected to the inner middle part of the cross rotating seat, the bottom end of the cross rotating seat is rotatably connected with a rotating arm, the bottom end of the inner rotating sleeve is fixed with a toggle slide post, and the main body of the rotating arm on the same side is slidably connected with the toggle slide post; The head end of each set of rotary arms is rotatably connected with an elastic slide bar, the separation and combination connection seat is fixed at the top of the elastic slide bar, the support rod is fixed at the top of the separation and combination connection seat, one end of the separation and combination spring is fixed to one side of the elastic slide bar, and the other end is fixed to the bottom of the rotary arm; The bottom of the bottom arm is rotatably connected to one end of the cross swivel seat, and a material guiding inclined bucket with a closing structure is fixed on the top of the inner swivel sleeve and tilted toward the center of the swivel sleeve. An active rotating gear is fixed at the end of the swivel arm, and the bottom end of the swivel shaft of the bottom arm is transmission-connected to the active rotating gear.

[0006] The use process of the technical solution of the present invention is as follows: After the support rod is fully retracted, the outlet of the material guiding hopper is directly opposite to the position of the support rod. The rubber band for bundling can slide from the material guiding hopper to the outside of the support formed by the array of support rods and fall onto the top of the split joint seat. The rotatable inner rotating sleeve can drive the array of shifting sliding columns to form a sliding fit with the rotating arms respectively, enabling the array of rotating arms to synchronously perform a rotating opening action and gradually expand the rubber band. Moreover, the elastic supporting force formed by the split spring piece for the rotation of the elastic sliding rod is much greater than the pulling force formed by the rubber band. With the rotating opening action of the rotating arm, it can also drive the rotation of the driving rotating gear, enabling the driving rotating gear to form a cooperative transmission with the rotating shaft of the bottom arm and driving the rotation of the bottom arm and the material guiding hopper. The purpose is to rotate the material guiding hopper outside the range of the inner space where the rubber band is expanded. Subsequently, the bundled plastic bags are placed inside the expanded rubber band. As the rotating arm continues to rotate, the side surface of the split joint seat will contact the inner ring of the inner rotating sleeve. With the rotating opening action of the rotating arm, a reverse pushing action will be formed on the split joint seat to tilt it inward, and the elastic pulling force formed by the split spring piece for the rotation of the elastic sliding rod will be overcome, enabling the array of support rods to synchronously tilt towards the center of the inner rotating sleeve, releasing the expanded rubber band and completing the bundling work on the bundled plastic bags.

[0007] By adopting the above technical solutions, the present invention can achieve the following beneficial effects: (1) Based on the cooperation formed by the rotation of the inner rotating sleeve and the array of rotating arms, the present invention can not only form the opening and closing actions of the array of support rods to achieve the basic purpose of expanding the rubber band, but also is provided with a material guiding hopper for introducing the rubber band from the outside. Through the smooth inclined surface of the material guiding hopper itself, the external rubber band can be quickly loaded between the outside formed by the support rods and the top of the split joint seat, improving the degree of automation. And more importantly, the material guiding hopper can also form a transmission connection with the rotation action of one of the rotating arms, enabling the material guiding hopper to be synchronously rotated to the position where the outlet is directly opposite to the support rod when the support rod is fully retracted. During the process of the support rod expanding the rubber band, the material guiding hopper can be synchronously rotated outside the range of the inner space where the rubber band is expanded, so that the material guiding hopper can not only be used as a guide to quickly load the rubber band between the outside formed by the support rods and the top of the split joint seat, but also be automatically recycled as the support rod expands the rubber band. (2) In addition, the present invention also arranges the support rod and the elastic sliding rod at the bottom of the separation and combination connecting seat to be rotationally connected to the head end of the swing arm. The elastic support connection condition between the elastic sliding rod and the bottom of the head end of the swing arm is realized through the separation and combination elastic piece with a unique shape. This not only can meet the requirement of the support rod to stretch the rubber band, but also after the separation and combination connecting seat moves to a certain position along with the rotation of the cross-shaped rotating seat, the side surface of the separation and combination connecting seat forms contact fit with the inner ring of the inner rotating sleeve, achieving the purpose of releasing the stretched rubber band by using the rotation action of the swing arm. The structure is simple and the degree of automation is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0009] Figure 1 FIG. 1 is a schematic diagram of the overall structure of a rubber band conveying and stretching mechanism for bundling plastic bags provided by the present invention; Figure 2 FIG. 2 is a schematic diagram of the overall structure of the stretching component of the present invention; Figure 3 FIG. 3 is a schematic diagram of the structure of the swing arm part of the present invention from the first perspective; Figure 4 FIG. 4 is a schematic diagram of the structure of the swing arm part of the present invention from the second perspective; Figure 5 FIG. 5 is a schematic diagram of the transmission structure of the semi-gear part of the present invention; Figure 6 FIG. 6 is a schematic diagram of the installation structure of the support rod component of the present invention; Figure 7 FIG. 7 is an exploded schematic diagram of the support rod component of the present invention; Figure 8 FIG. 8 is a schematic diagram of the connection structure of the separation and combination elastic piece part of the present invention; Figure 9 FIG. 9 is a schematic diagram of the cooperation structure of the separation and combination connecting seat and the inner rotating sleeve of the present invention; Figure 10 FIG. 10 is a schematic diagram of the structure of the rubber band cutting component of the present invention; Figure 11 FIG. 11 is a schematic diagram of the structure of the flip part of the present invention; Figure 12 FIG. 12 is a schematic diagram of the structure of the automatic feeding component of the present invention; Figure 13 FIG. 13 is an exploded schematic diagram of the automatic feeding component of the present invention; Figure 14It is a schematic diagram of the position structure of the automatic material feeding assembly and the material guiding inclined bucket in the first state of the present invention; Figure 15 It is a schematic diagram of the position structure of the automatic material feeding assembly and the material guiding inclined bucket in the second state of the present invention; Figure 16 It is a schematic diagram of the transmission structure of the material guiding and conveying component of the present invention.

[0010] Reference numerals: 1. Spreading assembly; 101. Base frame; 102. Top box; 103. Top plate; 104. Cross swivel seat; 105. Inner swivel sleeve; 106. Sliding column; 107. Swing arm; 108. Swing arm shaft; 109. Sliding slide; 110. Drive connecting sleeve; 111. Oblique connecting plate; 112. Rotating motor; 113. Driving gear; 114. Half gear; 2. Support rod assembly; 201. Elastic slide groove; 202. Elastic slide rod; 203. Split connection seat; 204. Support rod; 205. Side rotation seat; 206. Elastic rotation axis; 207. Moving clamp hole; 208. Split spring piece; 209. Plug-in column; 210. Bottom fixing seat; 211. Fixing hole; 3. Rubber band cutting assembly; 301. Rubber band tube; 302. Tube material conveyor belt; 303. Square seat; 304. Cutting slide column; 305. Cutting slide seat; 306. Cutting electric cylinder; 307. Cutter; 308. Conveying rotary seat; 309. Conveying roller; 310. Conveying motor; 311. Flip cover; 312. Flip cover rotary seat; 313. Clamp column; 314. Clamp slot; 315. Photoelectric sensor; 316. Buffer connection block; 4. Automatic feeding assembly; 401. Horizontal connecting frame; 402. Feeding lower rotating seat; 403. Feeding roller; 404. Feeding belt; 405. Side gear; 406. Feeding motor; 407. Feeding upper rotating seat; 5. Material guide conveying component; 501. Material guide inclined bucket; 502. Bottom arm; 503. Displacement rotary shaft; 504. Displacement rotary seat; 505. Displacement gear; 506. Connecting shaft; 507. Connecting gear; 508. Active rotating gear; 6. Plastic bag transmission components; 7. Automatic claw clamp assembly; 8. Main controller. DETAILED DESCRIPTION

[0011] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0012] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0013] like Figures 1 - 16 As shown, a rubber band conveying and spreading mechanism for bundling plastic bags, the inner rotating sleeve 105 in the spreading assembly 1 is rotatably connected to the inner middle part of the cross rotating seat 104, and can rotate automatically, the bottom end of the cross rotating seat 104 is arranged and rotatably connected with a rotating arm 107, the bottom end of the inner rotating sleeve 105 is arranged and fixed with a toggle slide post 106, the main body of the rotating arm 107 on the same side is slidably connected with the toggle slide post 106, and the automatic rotation of the inner rotating sleeve 105 can form a common opening and closing action of the plurality of rotating arms 107; The head end of each set of swing arms 107 is rotatably connected with an elastic slide bar 202, the separation and combination connection seat 203 is fixed to the top of the elastic slide bar 202, the support rod 204 is fixed to the top of the separation and combination connection seat 203, one end of the separation and combination spring piece 208 is fixed to one side of the elastic slide bar 202, and the other end is fixed to the bottom of the swing arm 107, the separation and combination spring piece 208 can form an elastic support force for the rotation of the elastic slide bar 202, and is sufficient to support the support rod 204 to stretch the rubber band as the swing arms 107 of the array are synchronously unscrewed, and after the swing arms 107 are unscrewed to the side of the separation and combination connection seat 203 touches the inner ring of the inner rotating sleeve 105, it can form a reverse push on the side of the separation and combination connection seat 203 through the inner ring of the inner rotating sleeve 105, so that the array support rods 204 are all tilted inward; The bottom of the bottom arm 502 is rotatably connected to one end of the cross rotary base 104. At the top, a material guiding inclined hopper 501 with a closing structure is fixedly inclined towards the center of the inner rotary sleeve 105. At the rotary joint at the end of the rotary arm 107, a driving rotary gear 508 is fixedly connected. The bottom end of the rotary shaft of the bottom arm 502 is in transmission connection with the driving rotary gear 508. After the support rod 204 is folded in place, the material guiding inclined hopper 501 can synchronously rotate to a position facing the support rod 204. After the support rod 204 stretches the rubber band in place as the rotary arm 107 rotates outwards, the material guiding inclined hopper 501 can synchronously rotate to a position where it does not interfere with the inner ring of the inner rotary sleeve 105; The rubber band cutting assembly 3 is located on one side of the cross rotary base 104 and can automatically cut the rubber band tubing.

[0014] The working principle is as follows: After the support rod 204 is folded in place, the outlet of the material guiding inclined hopper 501 is facing the position of the support rod 204. The rubber bands for bundling that have been cut by the rubber band cutting assembly 3 can automatically fall onto the material guiding inclined hopper 501, slide down from the material guiding inclined hopper 501 to the outside of the support formed by the array of support rods 204, and fall onto the top of the split joint seat 203; The rotatable inner rotary sleeve 105 can drive the array of shifting sliding columns 106 to form a sliding fit with the rotary arm 107 respectively, enabling the array of rotary arms 107 to synchronously perform a rotating-out action and gradually stretch the rubber band; Moreover, the elastic supporting force formed by the split elastic piece 208 for the rotation of the elastic sliding rod 202 is much greater than the pulling force formed by the rubber band. That is to say, during the process of the support rod 204 stretching the rubber band, the support rod 204 itself will not form a rotating action relative to the rotary arm 107; As the rotary arm 107 rotates outwards, it can also drive the rotation of the driving rotary gear 508, enabling the driving rotary gear 508 to form a mating transmission with the rotary shaft of the bottom arm 502, driving the rotation of the bottom arm 502 and the material guiding inclined hopper 501. The purpose is to rotate the material guiding inclined hopper 501 outside the range of the stretched rubber band inner cavity, so as not to interfere with the placement of the bundled plastic bags into the stretched rubber band interior; and before the support rod 204 stretches the rubber band in place, the material guiding inclined hopper 501 has completely rotated outside the inner ring of the inner rotary sleeve 105; Subsequently, the bundled plastic bags are placed into the interior of the stretched rubber band. As the rotary arm 107 continues to rotate outwards, the side of the split joint seat 203 will contact the inner ring of the inner rotary sleeve 105. As the rotary arm 107 rotates outwards, it will form a reverse pushing action on the split joint seat 203 to incline inwards and overcome the elastic pulling force formed by the split elastic piece 208 for the rotation of the elastic sliding rod 202, enabling the array of support rods 204 to synchronously incline towards the center of the inner rotary sleeve 105, releasing the stretched rubber band and completing the bundling work on the bundled plastic bags; And during the whole bundling operation, the elastic force of the rubber band itself is sufficient to support its expansion movement along with the support rod 204; And because the separation and combination connecting seat 203 protrudes sufficiently from the support rod 204, the separation and combination connecting seat 203 can provide sufficient support for the rubber band to slide down, and after the rubber band is stretched open by the support rod 204, it will not interfere with the cooperation formed by the side surface of the separation and combination connecting seat 203 and the inner surface of the inner rotating sleeve 105.

[0015] The specific structure of the expansion component 1 is as follows: Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the top box body 102 is fixedly connected to the top of the bottom frame 101, and the main controller 8 is fixedly installed on one side of the top of the bottom frame 101. The outer end of the cross rotating seat 104 is fixedly connected to the inner lower end of the top box body 102, and the top plate 103 is covered at the top opening of the top box body 102, and the top plate 103 is provided with a notch facing the inner circle of the inner rotating sleeve 105 to realize the insertion of bundled plastic bags; The bottom end of the cross rotary seat 104 is surrounded by a rotary arm shaft 108, and the end of the rotary arm 107 is rotatably connected to the rotary arm shaft 108. A toggle slide groove 109 is provided in the body of each set of rotary arms 107, and the toggle slide column 106 on the same side is slidably connected to the toggle slide groove 109; The drive connection sleeve 110 is fixedly connected to the bottom end of the array toggle slide 106, and the drive connection sleeve 110 will not interfere with the sliding cooperation between the toggle slide 106 and the toggle slide groove 109, and the drive connection sleeve 110 is coaxially arranged with the inner rotating sleeve 105; One side of the main body of the cross rotary seat 104 is fixedly connected with an oblique connecting plate 111, and a rotating motor 112 is fixedly installed at the bottom end of the oblique connecting plate 111. The rotating motor 112 is electrically connected to the main controller 8. A driving gear 113 is inserted and fixed in the rotating shaft of the rotating motor 112. The half gear 114 is fixedly connected to the outside of the driving connecting sleeve 110 and meshes with the driving gear 113. The purpose of setting the half gear 114 as an incomplete gear structure is to reduce weight and save manufacturing costs. Within the matching range of the driving gear 113 and the half gear 114, it is sufficient to support the array rotary arm 107 to form an opening and closing action; By starting the rotating motor 112 to drive the rotation of the driving gear 113, the driving gear 113 and the half gear 114 can form a matching transmission, which can drive the driving connecting sleeve 110 and the inner rotating sleeve 105 connected to the driving connecting sleeve 110 through the toggle slide 106 to rotate, so that the array toggle slides 106 can maintain concentric rotation. By utilizing the matching transmission formed by the toggle slide 106 and the toggle slide groove 109, the array swing arm 107 can form a rotation action based on the swing arm shaft 108, thereby achieving the purpose of synchronously opening and closing the array swing arm 107.

[0016] The specific structure of the support rod assembly 2 is as follows: Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, the elastic slide groove 201 is opened at the head end of the swing arm 107, the purpose is to provide space for the rotation of the elastic slide bar 202 and ensure the stability of the rotation of the elastic slide bar 202. The bottom of the head end of each set of swing arms 107 is fixedly connected with a side rotation seat 205, and the elastic rotation shaft 206 is horizontally fixedly connected to the bottom end of the elastic slide bar 202. After the elastic slide bar 202 passes through the elastic slide groove 201, the elastic rotation shaft 206 forms a rotation connection with the side rotation seat 205; A movable clamping hole 207 is provided on one side of the main body of the elastic slide rod 202, a bottom end of the rotary arm 107 is fixedly connected to a bottom fixing seat 210, a fixing clamping hole 211 is provided on one side of the main body of the bottom fixing seat 210, and the split-and-close spring sheet 208 is respectively inserted and fixed between the movable clamping hole 207 and the fixing clamping hole 211 through the plug-in columns 209 at both ends; The separation and combination spring piece 208 is a metal sheet structure with a certain elasticity. After the separation and combination spring piece 208 is connected between the elastic slide bar 202 and the bottom fixing seat 210 through the plug-in columns 209 at both ends of the separation and combination spring piece 208, an elastic supporting force can be formed for the rotation of the elastic rotating shaft 206 relative to the side rotating seat 205, thereby forming an elastic rotation connection between the elastic sliding bar 202, the separation and combination connecting seat 203 and the support rod 204 components relative to the head end of the rotating arm 107.

[0017] The specific structure of the material conveying member 5 is as follows: Figure 16 As shown, the yielding shaft 503 is fixedly connected to the outer side of the bottom end of the bottom arm 502, the yielding shaft 504 is fixedly installed on one side of the main body of the cross rotary seat 104, the yielding shaft 503 is rotatably connected in the yielding shaft 504, the yielding gear 505 is plugged and fixed at the bottom end of the yielding shaft 503, the bottom end of the cross rotary seat 104 is also fixed with a connecting shaft 506, the connecting gear 507 is rotatably connected to the connecting shaft 506, the active rotating gear 508 is fixedly connected to the end of one group of rotary arms 107, and the active rotating gear 508 and the rotary arm 107 are both rotatably connected in the rotary arm shaft 108; The connecting gear 507 is meshedly connected between the yielding gear 505 and the active rotating gear 508; There is also enough space between the top of the rotary arm 107 and the bottom of the cross rotary seat 104 to provide space for transmission between the yielding gear 505 and the active rotating gear 508; When the swing arm 107 rotates with the swing arm shaft 108 as the reference, the active rotating gear 508 and the connecting gear 507 can form a cooperative transmission to drive the rotation of the yielding gear 505, so that the yielding rotary shaft 503 rotates with the yielding rotary seat 504 as the reference, driving the bottom arm 502 and the material guiding inclined bucket 501 to form a rotation action; The purpose of meshing the connecting gear 507 between the yielding gear 505 and the active rotating gear 508 is to utilize the coordinated transmission formed between the active rotating gear 508, the connecting gear 507 and the yielding gear 505 to achieve a transmission ratio adapted to the rotation of the swing arm 107 and the rotation of the material guiding bucket 501.

[0018] The specific structure of the rubber band cutting component 3 that can automatically cut the rubber band tube material is as follows: Figure 10 and Figure 11 As shown, the rubber tube 301 is transversely fixed on one side of the top of the base frame 101, the pipe conveyor belt 302 is located on the inner lower side of the rubber tube 301, and the top side of the base frame 101 is also fixedly connected to a square seat 303, and the inside of the square seat 303 is vertically fixed with pairs of cutting slides 304, and each group of cutting slides 304 is slidably connected with a cutting slide 305, and a buffer connection block 316 is fixedly connected between the cutting slides 305. A cutting electric cylinder 306 is fixedly installed on the inner top of the square seat 303, and the cutting electric cylinder 306 is electrically connected to the main controller 8. The bottom end of the telescopic rod of the cutting electric cylinder 306 is fixedly connected to the top of the buffer connection block 316, and the cutter 307 is fixedly installed at the bottom end of the buffer connection block 316; By moving the telescopic rod of the cutting electric cylinder 306, the components of the buffer connection block 316, the cutting slide 305 and the cutter 307 can be driven to move guided by the cutting slide 304, thereby forming a cutting action of the cutter 307; The buffer connection block 316 is made of nylon, and can form a buffer for the cutting action of the cutter 307 through the buffer connection block 316, so that when the bottom edge of the cutter 307 contacts the inner bottom of the square seat 303, a safe and effective cutting action can be formed; Conveying swivel seats 308 are symmetrically fixed on both sides of the main body of the rubber band tube 301, and conveying rollers 309 are rotatably connected between the conveying swivel seats 308 on the same side, and the pipe material conveyor belt 302 is sleeved and installed between the conveying rollers 309; A conveying motor 310 is fixedly mounted on one side of the top of the bottom frame 101. The conveying motor 310 is electrically connected to the main controller 8. The outer shaft ends of a group of conveying rollers 309 are fixedly connected to the rotating shaft of the conveying motor 310. The outer surface of the tube material conveyor belt 302 is a rough surface structure, which can be used to place the rubber band tube material to be cut. By starting the conveying motor 310 to drive the conveying roller 309 to rotate, the tube material conveyor belt 302 can form a cutting and conveying action for the rubber band tube material; On both sides of the outlet end of the rubber band tube 301, the flip cover rotating seats 312 are fixed. The lower part of one end of the flip cover 311 is rotatably connected to the flip cover rotating seat 312. On both sides of the inlet end of the rubber band tube 301, clamping columns 313 are fixedly connected. On both sides of the lower part of the other end of the flip cover 311, clamping grooves 314 are formed, which can form the opening and closing action of the flip cover 311 relative to the rubber band tube 301. And through the elastic clamping fit formed by the clamping grooves 314 and the clamping columns 313, the purpose of facilitating the opening and closing of the flip cover 311 can be achieved; The purpose of arranging the flip cover 311 at the upper end of the rubber band tube 301 is that through the fastening of the flip cover 311, the rubber band tube material with certain elasticity can be extruded between the inner groove of the rubber band tube 301 and the outer top surface of the tube material conveyor belt 302, which is more conducive to the conveying of the rubber band tube material; The photoelectric sensor 315 is installed and fixed on one side of the inner bottom of the square seat 303 and is electrically connected to the main controller 8, and is used to sense the protruding position of the rubber band tube material relative to the cutting knife 307, so as to form the automatic stop of the tube material conveyor belt 302 after the rubber band tube material extends to the cutting position in place.

[0019] The specific structure of the automatic feeding component 4 for realizing the transfer of the cut rubber bands between the rubber band cutting component 3 and the guiding hopper 501 is as Figure 12 、 Figure 13 、 Figure 14 and Figure 15 shown. The horizontal connecting frame 401 is horizontally fixedly connected inside the top box body 102. The feeding lower rotating seats 402 are fixedly connected in pairs at the top end of the horizontal connecting frame 401. The feeding upper rotating seats 407 are fixedly installed in pairs at the bottom end of the square seat 303. Between the paired feeding lower rotating seats 402 and the feeding upper rotating seats 407, feeding rollers 403 are rotatably connected. The feeding belt 404 is sleeved and installed between the feeding rollers 403. On one side of the top end of the horizontal connecting frame 401, a feeding motor 406 is installed and fixed. The feeding motor 406 is electrically connected to the main controller 8. The outer shaft end of the lower group of feeding rollers 403 is fixedly connected to the rotating shaft of the feeding motor 406; On both ends of the outside of the feeding belt 404, side baffles 405 are fixed. The side baffles 405 can play a protective role, so that the conveyed rubber bands will not slide to a position outside the guiding hopper 501; The automatic conveying action formed by the feeding belt 404 can not only accelerate the movement of the cut rubber bands from the rubber band cutting component 3 to the support rod 204, but also solve the problem that there is a risk of jamming due to the slippage of the rubber bands when the guiding hopper 501 is used alone and connected to the rubber band cutting component 3; An automatic feeding component 4 is arranged between the rubber band cutting component 3 and the material guiding and conveying component 5. Instead of directly connecting the material guiding inclined hopper 501 to the rubber band cutting component 3, the purpose is that the automatic feeding component 4 can provide a certain potential energy for the falling movement of the rubber band, so that the cut rubber band can, through the acceleration of the automatic feeding component 4, successfully fall outside the support rod 204 and between the top end of the split connection seat 203 under the guidance of the material guiding inclined hopper 501.

[0020] Preferably, in order to improve the automation degree of the operation process, a plastic bag transmission component 6 and an automatic claw assembly 7 can also be installed on one side of the top end of the chassis 101. Both the plastic bag transmission component 6 and the automatic claw assembly 7 are electrically connected to the main controller 8. The plastic bag transmission component 6 is used to realize the batch placement and conveying of bundled plastic bags. The automatic claw assembly 7 is used to sequentially convey the bundled plastic bags to be bundled into the inside of the expanded rubber band from the notch of the top plate 103, and can quickly move out after bundling the bundled plastic bags with the rubber band. Both the plastic bag transmission component 6 and the automatic claw assembly 7 are existing mature technologies and will not be elaborated here.

[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rubber band conveying and opening mechanism for bundling plastic bags, comprising an opening assembly (1), characterized in that: It also includes a support rod assembly (2) and a material guide and conveying member (5); The spreading assembly (1) comprises a cross rotating seat (104) and an inner rotating sleeve (105); the supporting rod assembly (2) comprises a separation and combination connecting seat (203), a supporting rod (204) and a separation and combination spring sheet (208); and the material guiding and conveying member (5) comprises a bottom arm (502) and an active rotating gear (508); The inner rotating sleeve (105) is rotatably connected to the inner middle part of the cross rotating seat (104), the bottom end of the cross rotating seat (104) is rotatably connected to a rotating arm (107), the bottom end of the inner rotating sleeve (105) is fixed with a toggle slide post (106), the main body of the rotating arm (107) on the same side is slidably connected to the toggle slide post (106), the head end of each set of rotating arms (107) is rotatably connected to an elastic slide rod (202), the split connection seat (203) is fixed to the top end of the elastic slide rod (202), and the support rod (203) is fixed to the top end of the elastic slide rod (202). 04) is fixed on the top of the separation and combination connection seat (203), one end of the separation and combination spring (208) is fixed to one side of the elastic slide rod (202), and the other end is fixed to the bottom of the rotary arm (107), the bottom of the bottom arm (502) is rotationally connected to one end of the cross rotary seat (104), the top is inclined and fixed with a material guiding inclined bucket (501), and the end of the rotary arm (107) is fixed with an active rotating gear (508), and the bottom end of the rotary shaft of the bottom arm (502) is transmission-connected to the active rotating gear (508).

2. The rubber band conveying and opening mechanism for bundling plastic bags according to claim 1, characterized in that: The expansion assembly (1) further comprises a bottom frame (101), a top box body (102), a top plate (103), a driving connection sleeve (110) and a half gear (114); the top box body (102) is fixedly connected to the top of the bottom frame (101); the outer end of the cross rotary seat (104) is fixedly connected to the inner lower end of the top box body (102); the top plate (103) is covered on the top of the top box body (102); a rotary arm shaft (108) is arranged and fixed at the bottom end of the cross rotary seat (104); the end of the rotary arm (107) is rotatably connected to the rotary arm shaft (108); and the main body of each set of rotary arms (107) A toggle slide groove (109) is provided in the middle, the toggle slide column (106) on the same side is slidably connected to the toggle slide groove (109), the drive connecting sleeve (110) is fixedly connected to the bottom end of the toggle slide column (106), one side of the main body of the cross rotary seat (104) is fixedly connected to an oblique connecting plate (111), the bottom end of the oblique connecting plate (111) is fixedly installed with a rotating motor (112), the rotating shaft of the rotating motor (112) is plugged and fixed with a driving gear (113), and the half gear (114) is fixedly connected to the outside of the driving connecting sleeve (110) and meshes with the driving gear (113).

3. The rubber band conveying and opening mechanism for bundling plastic bags according to claim 2, characterized in that: The support rod assembly (2) further comprises an elastic slide groove (201), an elastic swivel (206) and a plug-in column (209). The elastic slide groove (201) is provided at the head end of the swing arm (107). The bottom of the head end of each set of swing arms (107) is fixedly connected to a side swivel seat (205). The elastic swivel (206) is laterally fixedly connected to the bottom end of the elastic slide rod (202). After the elastic slide rod (202) passes through the elastic slide groove (201), the elastic swivel (206) is rotatably connected with the side rotating seat (205), a moving clamping hole (207) is provided on one side of the main body of the elastic slide rod (202), a bottom end of the head end of the rotating arm (107) is fixedly connected to a bottom fixing seat (210), a fixing clamping hole (211) is provided on one side of the main body of the bottom fixing seat (210), and the separating and combining spring sheet (208) is respectively inserted and fixed between the moving clamping hole (207) and the fixing clamping hole (211) through the plug-in columns (209) at both ends.

4. A rubber band conveying and opening mechanism for bundling plastic bags according to claim 1, 2 or 3, characterized in that: The material guide conveying member (5) further comprises a yielding swivel shaft (503), a yielding gear (505) and a connecting gear (507); the yielding swivel shaft (503) is fixedly connected to the outer side of the bottom end of the bottom arm (502); a yielding swivel seat (504) is fixedly mounted on one side of the main body of the cross swivel seat (104); the yielding swivel shaft (503) is rotatably connected to the yielding swivel seat (504); the yielding gear (505) is plugged and fixed to the bottom end of the yielding swivel shaft (503); a connecting shaft (506) is also fixed to the bottom end of the cross swivel seat (104); the connecting gear (507) is rotatably connected to the connecting shaft (506); and the connecting gear (507) is meshingly connected between the yielding gear (505) and the active rotating gear (508).

5. The rubber band conveying and opening mechanism for bundling plastic bags according to claim 2 or 3, characterized in that: A rubber band cutting assembly (3) is also installed on one side of the top end of the base frame (101). The rubber band cutting assembly (3) includes a rubber band tube (301), a tube material conveyor belt (302), a cutting slide seat (305), a cutter (307) and a buffer connection block (316). The rubber band tube (301) is fixed to one side of the top end of the base frame (101). The tube material conveyor belt (302) is located on the inner lower side of the rubber band tube (301). The top end of the base frame (101) is also fixedly connected to a square seat (303). The square seat Pairs of cutting slides (304) are fixed inside (303), and a cutting slide seat (305) is slidably connected in each group of cutting slides (304). A buffer connection block (316) is fixedly connected between the cutting slide seats (305). A cutting electric cylinder (306) is fixedly installed on the inner top of the square seat (303). The bottom end of the telescopic rod of the cutting electric cylinder (306) is fixedly connected to the top of the buffer connection block (316), and the cutter (307) is fixedly installed on the bottom end of the buffer connection block (316).

6. The rubber band conveying and opening mechanism for bundling plastic bags according to claim 5, characterized in that: The rubber band cutting assembly (3) further comprises a conveying motor (310), conveying rotary seats (308) are symmetrically fixed on both sides of the main body of the rubber band tube (301), conveying rollers (309) are rotatably connected between the conveying rotary seats (308) on the same side, the tube material conveyor belt (302) is sleeved and installed between the conveying rollers (309), and the conveying motor (310) is installed and fixed on one side of the top end of the base frame (101), and the outer shaft ends of a group of conveying rollers (309) are fixedly connected to the rotating shaft of the conveying motor (310).

7. The rubber band conveying and opening mechanism for bundling plastic bags according to claim 6, characterized in that: The rubber band cutting assembly (3) further comprises a flap (311), flap rotary seats (312) are fixed on both sides of the outlet end of the rubber band tube (301), the lower part of one end of the flap (311) is rotatably connected to the flap rotary seat (312), the inlet end of the rubber band tube (301) is fixedly connected to clamping columns (313) on both sides, and the lower part of the other end of the flap (311) is provided with clamping grooves (314) on both sides.

8. The rubber band conveying and opening mechanism for bundling plastic bags according to claim 7, characterized in that: The rubber band cutting assembly (3) further includes a photoelectric sensor (315), and the photoelectric sensor (315) is mounted and fixed on one side of the inner bottom of the square seat (303).

9. A rubber band conveying and opening mechanism for bundling plastic bags according to claim 6, 7 or 8, characterized in that: An automatic material feeding assembly (4) is also provided between the rubber band cutting assembly (3) and the material guiding and conveying member (5), the automatic material feeding assembly (4) comprising a transverse connecting frame (401), a material feeding lower rotating seat (402), a material feeding belt (404) and a material feeding upper rotating seat (407), the transverse connecting frame (401) being fixedly connected to the inside of the top box body (102), the material feeding lower rotating seats (402) being fixedly connected in pairs to the top of the transverse connecting frame (401), and the material feeding upper rotating seats (407) being fixedly installed in pairs on the square seat At the bottom end of the feed roller (403), a pair of feed lower rotary seats (402) and a feed upper rotary seat (407) are rotatably connected with feed rollers (403), a feed belt (404) is sleeved and installed between the feed rollers (403), a feed motor (406) is fixedly installed on one side of the top of the transverse connecting frame (401), the outer shaft ends of a group of feed rollers (403) on the lower side are fixedly connected to the rotating shaft of the feed motor (406), and side guards (405) are fixed on both ends of the outer side of the feed belt (404).

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