A food packaging bag directional conveying device

Abstract

The present invention discloses a directional conveying device for food packaging bags, which belongs to the field of food packaging bag processing, and includes a packaging bag conveying platform, on which a packaging bag conveying unit is arranged, and the packaging bag conveying unit is composed of a packaging bag conveying picking mechanism, a packaging bag conveying identification mechanism and a packaging bag conveying directional mechanism, which are respectively used for picking up food packaging bags, identifying the position of the sealing strip and the hot-melt sealing state, and directional conveying and stacking. The present invention can receive packaging bags with sealing strips through the packaging bag conveying unit, and identify the hot-melt position and hot-melt state of the sealing strip of the packaging bag according to the touch time difference between the sealing strip and the packaging bag conveying identification mechanism, and provide a conveying direction for the packaging bag conveying directional mechanism to convey the packaging bag, so that the packaging bags that meet the hot-melt standard of the sealing strip can be stacked and collected, and the defective products can be removed and stacked, so as to achieve the effect of directional conveying of packaging bags.

Description

Technical Field

[0001] The invention relates to the technical field of food packaging bag processing, and in particular to a directional conveying device for food packaging bags. Background Art

[0002] Food packaging bags refer to film containers that are in direct contact with food and are used to hold and protect food. Food packaging bags can be divided into ordinary food packaging bags, vacuum food packaging bags, inflated food packaging bags, boiled food packaging bags, steamed food packaging bags and functional food packaging bags according to their scope of application. In order to extend the shelf life and dryness of food in food packaging bags, sealing strips are often adhered to the openings to isolate the air.

[0003] After the food packaging bags with sealing strips are collected into the box after hot-melt sealing, it is necessary to identify the position of the sealing strip and the hot-melt condition, remove the food packaging bags that do not meet the hot-melt standard of the sealing strip, directionally transport the bags with the same sealing strip position, and stack them for collection, so as to ensure the sealing inside the bag and extend the shelf life of the food when filling the food packaging bags with food. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that after the food packaging bags with sealing strips are hot-melt sealed and collected, it is necessary to identify the position and hot-melt status of the sealing strips, eliminate the food packaging bags that do not meet the hot-melt standards of the sealing strips, and directionally convey the bags with the same sealing strips and stack them for collection. A directional conveying device for food packaging bags is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A food packaging bag directional conveying device, comprising a packaging bag conveying platform for directional conveying of food packaging bags, wherein a packaging bag conveying unit is arranged on the packaging bag conveying platform, wherein the packaging bag conveying unit is composed of a packaging bag conveying picking mechanism, a packaging bag conveying identification mechanism and a packaging bag conveying directional mechanism, wherein the packaging bag conveying picking mechanism is arranged at the conveying front section of the packaging bag conveying platform for picking up food packaging bags, wherein the packaging bag conveying identification mechanism is arranged at the conveying middle section of the packaging bag conveying platform for identifying the position of the sealing strip of the food packaging bag and the hot-melt sealing state, wherein the packaging bag conveying directional mechanism is arranged at the conveying rear section of the packaging bag conveying platform for directional conveying, stacking and collecting food packaging bags;

[0007] The packaging bag conveying and picking mechanism comprises a picking conveying box and a packaging bag negative pressure conveying belt arranged on the top of the packaging bag conveying platform, a symmetrically arranged picking bracket is installed at the bottom of the picking conveying box, a picking thickness adjustment plate is arranged at the top of the picking bracket, the packaging bag negative pressure conveying belt is driven by a servo motor, and a negative pressure sealing bracket fixedly installed on the packaging bag conveying platform is arranged inside the packaging bag negative pressure conveying belt, the negative pressure sealing bracket forms a closed space through a negative pressure sealing plate, and the negative pressure sealing bracket is connected to a negative pressure air duct;

[0008] The packaging bag conveying identification mechanism includes a sealing strip sensor arranged on the picking and conveying box, and the sealing strip sensor is composed of a touch rod, a touch switch and a timer;

[0009] The packaging bag conveying and orienting mechanism includes a stacking bracket arranged on the top of the packaging bag conveying platform, a stacking electric hydraulic cylinder is arranged on the top of the stacking bracket, and a stacking collection platform is arranged on the side of the stacking bracket away from the packaging bag negative pressure conveyor belt, a stacking limit plate is arranged on the top of the stacking collection platform, the stacking electric hydraulic cylinder is connected to the conveying and orienting bracket through a hydraulic connecting rod, and a stepping motor is arranged on the side of the conveying and orienting bracket away from the packaging bag negative pressure conveyor belt, and the stepping motor touches the top of the packaging bag negative pressure conveyor belt through the conveying and orienting roller.

[0010] Preferably, a picking driving groove is provided between the two picking brackets, a picking limiting hole is provided between the picking thickness adjustment plate and the picking bracket, and a picking roller is provided on the top of the picking bracket.

[0011] Preferably, a downward-inclined picking bar is fixedly installed on the side of the picking thickness adjustment plate, the touch rod is fixed to the bottom of the picking bar by a downward pressure spring and maintains a downward pressure trend, and the touch rod is rotatably connected to a no-load detection wheel through a detection shaft, and the outer surface of the no-load detection wheel is provided with a no-load sensing blade.

[0012] Preferably, a touch roller that contacts the top of the packaging bag conveying platform is rotatably connected to the outer side of the touch rod, and the touch roller is symmetrically arranged on the outer side of the no-load detection wheel.

[0013] Preferably, the inner wall of the packaging bag negative pressure conveyor belt is provided with negative pressure adsorption holes, and the top of the negative pressure sealing plate is provided with a negative pressure driven adsorption hole groove, and the negative pressure driven adsorption hole groove is composed of densely arranged separated negative pressure holes and negative pressure detection holes arranged at the initial stage of conveying of the packaging bag conveying platform.

[0014] Preferably, an arc-shaped conveying and receiving seat whose inner wall is connected to the negative pressure air duct is provided on the top of the negative pressure sealing plate, and the arc-shaped conveying and receiving seat is arranged in the picking drive groove.

[0015] Preferably, a limiting bracket is arranged on the right side of the picking and conveying box, and a limiting roller shaft is symmetrically arranged at the bottom of the limiting bracket and is rollingly connected to the top of the negative pressure conveyor belt of the packaging bag, and a limiting inclined surface and a limiting twill are arranged on the surface of the limiting roller shaft.

[0016] Preferably, the stacking electric hydraulic cylinder controls the falling of the conveying directional bracket through an infrared detector, and the conveying directional bracket is staggered at the bottom of the stacking bracket, and the stepper motor points to the stacking collection tables staggered on the front and rear sides respectively through the conveying directional roller, and the outer surface of the conveying directional roller is provided with a conveying spiral groove.

[0017] After the hot-melt sealing of the food packaging bags with sealing strips is collected, it is necessary to identify the position of the sealing strips and the hot-melt condition, remove the food packaging bags that do not meet the hot-melt standards of the sealing strips, directional transport the bags with the same position of the sealing strips, and stack and collect them.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The packaging bag conveying unit equipped with a packaging bag conveying and picking mechanism, a packaging bag conveying identification mechanism and a packaging bag conveying directional mechanism can receive packaging bags with sealing strips, and identify the hot-melting position and hot-melting condition of the sealing strip of the packaging bag according to the contact time difference between the sealing strip and the packaging bag conveying identification mechanism, so as to provide a conveying direction for the packaging bag conveying directional mechanism to convey the packaging bag, thereby being able to stack and collect packaging bags that meet the hot-melting standards of the sealing strip, and remove and stack defective products, thereby achieving the effect of directional conveying of packaging bags.

[0020] 2. Through the touch rod equipped with an empty detection wheel and the negative pressure detection hole, it is possible to identify whether the packaging bag is received at the top of the negative pressure conveyor belt, and calculate whether the packaging bag is in a reverse state based on the packaging bag reception and the contact time between the sealing strip and the touch rod, thereby improving the accuracy of identifying the hot-melt part of the packaging bag sealing strip.

[0021] 3. The touch rod equipped with a touch roller cooperates with a touch switch and a timer to identify the length and hot-melt sealing property of the sealing strip, and obtain the thickness of the front and rear ends of the sealing strip through inverse trigonometric functions, thereby providing the sealing strip hot-melt data for the packaging bag conveying and directional mechanism, making it easier to stack and collect packaging bags that meet the sealing strip hot-melt standards, and to remove and stack defective products, thereby achieving the effect of digitally controlling the directional stacking and collection of packaging bags and the removal of defective products.

[0022] 4. By using a limiting roller equipped with a limiting inclined surface and limiting twill in conjunction with a picking strip, the packaging bags at the edge of the negative pressure conveyor belt can be pushed to the central area, thereby avoiding the contact between the touch rod and the packaging bag sealing strip, identifying the hot-melt portion of the packaging bag sealing strip, and achieving the effect of improving the accuracy of identifying the hot-melt portion of the packaging bag sealing strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of a food packaging bag directional conveying device proposed by the present invention;

[0024] Figure 2 This is an overall structural assembly view of a food packaging bag directional conveying device proposed by the present invention;

[0025] Figure 3 This is an assembly view of a negative pressure sealing bracket and a limiting bracket structure of a food packaging bag directional conveying device proposed by the present invention;

[0026] Figure 4 This is a cross-sectional view of the internal structure of a negative pressure sealing support of a food packaging bag directional conveying device proposed by the present invention;

[0027] Figure 5 For the present invention Figure 4 A magnified view of the structure at center A;

[0028] Figure 6 This is a schematic diagram of the structural orientation correspondence between a conveying directional roller and a stacking and collecting platform of a food packaging bag directional conveying device proposed by the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of a picking and conveying box of a food packaging bag directional conveying device proposed by the present invention;

[0030] Figure 8 This is an exploded view of the internal structure of a picking and conveying box of a food packaging bag directional conveying device proposed by the present invention.

[0031] In the figure: 1. Packing bag conveyor; 2. Stacking bracket; 21. Stacking electric hydraulic cylinder; 22. Stacking collection table; 221. Stacking limit plate; 23. Infrared detector; 3. Picking conveyor box; 31. Picking bracket; 311. Picking drive slot; 312. Picking roller; 32. Picking thickness adjustment plate; 321. Picking limit hole; 322. Picking bar; 33. Touch rod; 331. Pressing spring; 332. Detection shaft; 333. No-load detection wheel; 334, no-load sensing blade; 34, touch roller; 4, packaging bag negative pressure conveyor belt; 41, servo motor; 42, negative pressure adsorption hole; 5, negative pressure sealing bracket; 51, negative pressure sealing plate; 511, separating negative pressure hole; 512, negative pressure detection hole; 52, negative pressure air duct; 53, arc-shaped conveying receiving seat; 6, conveying directional bracket; 61, stepping motor; 62, conveying directional roller; 7, limit bracket; 71, limit roller. DETAILED DESCRIPTION

[0032] The technical solutions 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 only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the 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 position, be constructed and operated in a specific position, 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.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Example, see Figures 1 to 8A food packaging bag directional conveying device comprises a packaging bag conveying platform 1 for directionally conveying food packaging bags, a packaging bag conveying unit is arranged on the packaging bag conveying platform 1, and the packaging bag conveying unit consists of a packaging bag conveying picking mechanism, a packaging bag conveying identification mechanism and a packaging bag conveying directional mechanism. The packaging bag conveying picking mechanism is arranged at the conveying front section of the packaging bag conveying platform 1, and is used to pick up food packaging bags. The packaging bag conveying identification mechanism is arranged at the conveying middle section of the packaging bag conveying platform 1, and is used to identify the position of the sealing strip of the food packaging bag and the hot-melt sealing state. The packaging bag conveying directional mechanism is arranged at the conveying rear section of the packaging bag conveying platform 1, and is used to directionally convey, stack and collect food packaging bags.

[0036] It should be noted that: when the sealing strip packaging bag is transported in a directional manner, it is necessary to identify the hot-melt position and sealing state of the sealing strip of the packaging bag, so as to improve the efficiency of filling food later and accurately set the bundling position when bundling, so as to avoid the hot-melt position and sealing state of the sealing strip not meeting the standard, so that the internal space of the packaging bag is exposed to the air and causes pollution. Through the packaging picking mechanism, multiple packaging bags in the picking and conveying box 3 can be picked up in an orderly manner, so that they fall one by one to the top of the packaging bag negative pressure conveyor belt 4, and the hot-melt position and hot-melt length of the sealing strip can be used to know in what hot-melt state the sealing strip is set in the packaging bag, so as to serve as a basis for transportation orientation when the packaging bag is transported in a directional manner;

[0037] Next, the packaging bags are conveyed in a directional manner through the packaging bag conveying and orienting mechanism, and the packaging bags with offset hot-melt parts of the sealing strips or inadequate hot-melt sealing, i.e., packaging bags with different thicknesses at symmetrical detection points of the sealing strips, are removed and stacked on the stacking and collecting platform 22 on the rear side of the packaging bag negative pressure conveyor belt 4, and the packaging bags with hot-melt sealing strips that meet the standards are collected and stacked on the stacking and collecting platform 22 on the front side.

[0038] like Figures 2 to 5 As shown, the packaging bag conveying and picking mechanism includes a picking conveying box 3 and a packaging bag negative pressure conveyor belt 4 arranged on the top of the packaging bag conveying platform 1, a symmetrically arranged picking bracket 31 is installed at the bottom of the picking conveying box 3, a picking thickness adjustment plate 32 is arranged on the top of the picking bracket 31, the packaging bag negative pressure conveyor belt 4 is driven by a servo motor 41, and a negative pressure sealing bracket 5 fixedly installed on the packaging bag conveying platform 1 is arranged in the packaging bag negative pressure conveyor belt 4, the negative pressure sealing bracket 5 forms a closed space through the negative pressure sealing plate 51, and the negative pressure sealing bracket 5 is connected to the negative pressure air duct 52.

[0039] Furthermore, a pick-up driving slot 311 is provided between the two pick-up brackets 31, a pick-up limiting hole 321 is provided between the pick-up thickness adjustment plate 32 and the pick-up bracket 31, and a pick-up roller 312 is provided on the top of the pick-up bracket 31;

[0040] It should be noted that: an arc-shaped conveying and receiving seat 53 whose inner wall is connected to the negative pressure air duct 52 is provided on the top of the negative pressure sealing plate 51, and the arc-shaped conveying and receiving seat 53 is arranged in the picking drive groove 311. When the packaging bag negative pressure conveyor belt 4 is driven by the servo motor 41 and passes through the picking drive groove 311, the packaging bags at the bottom layer are adsorbed to the top of the packaging bag negative pressure conveyor belt 4, and the upper packaging bags are isolated through the picking limit hole 321, thereby completing the picking operation of picking up the disordered packaging bags in the picking and conveying box 3 one by one.

[0041] Furthermore, the inner wall of the negative pressure conveyor belt 4 of the packaging bag is provided with a negative pressure adsorption hole 42, and the top of the negative pressure sealing plate 51 is provided with a negative pressure driven adsorption hole groove, and the negative pressure driven adsorption hole groove is composed of densely arranged separation negative pressure holes 511, and the separation negative pressure holes 511 are arranged in the central part of the negative pressure conveyor belt 4 of the packaging bag, so as to centrally adsorb the front end of the packaging bag whose sealing strip is in the conveying direction, that is, the bottom of the packaging bag whose bag opening is facing the stacking bracket 2, and the negative pressure detection hole 512 arranged at the initial conveying section of the packaging bag conveying platform 1;

[0042] It should be noted that the negative pressure air duct 52 forms a negative pressure environment for the closed space surrounded by the negative pressure sealing plate 51 through an external negative pressure fan, and is connected with the separating negative pressure hole 511 through the negative pressure adsorption hole 42, so as to adsorb the packaging bags attached to the top of the packaging bag negative pressure conveyor belt 4, thereby ensuring that after the packaging bags are received, the packaging bags will not undergo autonomous lateral displacement when being transported at the top of the packaging bag negative pressure conveyor belt 4.

[0043] like Figure 4 and Figure 5 As shown, the packaging bag conveying identification mechanism includes a sealing strip sensor arranged on the picking and conveying box 3, and the sealing strip sensor is composed of a touch rod 33, a touch switch and a timer;

[0044] Furthermore, a downwardly inclined pick-up bar 322 is fixedly installed on the side of the pick-up thickness adjustment plate 32, and a touch rod 33 is fixed to the bottom of the pick-up bar 322 through a downward pressure spring 331 and maintains a downward pressure trend, and the touch rod 33 is rotatably connected to a no-load detection wheel 333 through a detection shaft 332, and an outer surface of the no-load detection wheel 333 is provided with a no-load sensing blade 334;

[0045] It should be noted that: after the packaging bag is received, it passes through the picking thickness adjustment plate 32, and at this time, the packaging bag is at the top of the arc-shaped conveying receiving seat 53. Then, as the packaging bag negative pressure conveyor belt 4 moves downward, the sealing strip provided in the packaging bag contacts the symmetrically provided touch rod 33 when passing through the picking strip 322, so that the hot-melting position and hot-melting condition of the sealing strip of the packaging bag are identified through the conduction time of the touch switch between the two and the interval time recorded by the timer, and the hot-melting state of the sealing strip in the packaging bag is deduced;

[0046] Based on the above, when the touch roller 34 contacts the negative pressure conveyor belt 4 of the packaging bag, the height of the touch rod 33 is kept consistent. The connection between the detection shaft 332 and the touch rod 33 adopts a spherical universal joint. When the touch roller 34 set on one side of the touch rod 33 contacts the sealing strip first, it will drive the touch rod 33 on this side to rise, turn on the touch switch and interval timer here, and then when the touch rod 33 on the other side contacts the sealing strip, the corresponding touch switch is turned on and the interval timer is turned off. At this time, the product of the time recorded by the interval timer and the conveying speed of the negative pressure conveyor belt 4 of the packaging bag is obtained to obtain the displacement between the front end and the rear end of the sealing strip, and the hot melt offset angle of the sealing strip is obtained by using the inverse trigonometric function through the spacing set between the two touch rods 33;

[0047] The further advantage of adopting the above method is that a negative pressure detection hole 512 is provided at the corresponding position of the bottom of the no-load sensing blade 334. At this time, a negative pressure environment of the negative pressure sealing plate 51 is formed through the existing negative pressure fan externally connected to the negative pressure air duct 52, and the air flow is guided to flow through the no-load sensing blade 334, driving the no-load detection wheel 333 to rotate. At this time, it indicates that the top of the negative pressure conveyor belt 4 of the packaging bag corresponding to the bottom of the no-load detection wheel 333 has not received a packaging bag. On the contrary, when the no-load detection wheel 333 stops rotating, it indicates that a packaging bag is placed on the top of the negative pressure conveyor belt 4 of the packaging bag.

[0048] Based on the above, by cooperating with the touch rod 33 and the no-load detection wheel 333, it is possible to know whether the sealing strip is close to the front end or the rear end of the packaging bag along the conveying direction, so as to know whether the packaging bag is conveyed in the reverse direction after being received by the packaging bag negative pressure conveyor belt 4;

[0049] Based on the above, when the touch rod 33 contacts the packaging bag through the touch roller 34 and only one side of the touch switch is turned on, the placement angle of the packaging bag is displayed as horizontal placement.

[0050] like Figure 2 , Figure 4 and Figure 6 As shown, the packaging bag conveying and orienting mechanism includes a stacking bracket 2 arranged on the top of the packaging bag conveying platform 1, a stacking electric hydraulic cylinder 21 is arranged on the top of the stacking bracket 2, and a stacking collection platform 22 is arranged on the side of the stacking bracket 2 away from the packaging bag negative pressure conveyor belt 4, a stacking limit plate 221 is arranged on the top of the stacking collection platform 22, the stacking electric hydraulic cylinder 21 is connected to the conveying orienting bracket 6 through a hydraulic connecting rod, and a stepping motor 61 is arranged on the side of the conveying orienting bracket 6 away from the packaging bag negative pressure conveyor belt 4, and the stepping motor 61 touches the top of the packaging bag negative pressure conveyor belt 4 through the conveying orienting roller 62.

[0051] It should be noted that: after the hot-melt state of the sealing strip of the packaging bag is known through the packaging picking mechanism, the stepping motor 61 is started to drive the corresponding conveying and directional roller 62 to convey the packaging bag at the bottom of the conveying and directional roller 62 to the stacking and collecting platform 22 in a directional manner;

[0052] Based on the above, the negative pressure sealing plate 51 corresponding to the top of the conveying orienting roller 62 has a smaller number of separating negative pressure holes 511 than other conveying parts. When the conveying orienting roller 62 rotates, it can drive the packaging bag at the bottom to fit the packaging bag negative pressure conveyor belt 4 for longitudinal displacement, thereby facilitating the directional conveying of the packaging bag.

[0053] Furthermore, the stacking electric hydraulic cylinder 21 controls the falling of the conveying directional bracket 6 through the infrared detector 23, and the conveying directional bracket 6 is staggered at the bottom of the stacking bracket 2, and the stepper motor 61 points to the stacking collection platform 22 staggered on the front and rear sides through the conveying directional roller 62, and the outer surface of the conveying directional roller 62 is provided with a conveying spiral groove.

[0054] It should be noted that when the packaging bag needs to pass over the conveying orienting roller 62 set at the conveying front end, that is, when the sealing strip of the packaging bag is hot-melted and qualified, the stacking electric hydraulic cylinder 21 is used to drive the conveying orienting roller 62 set at the conveying front end to rise without contacting the packaging bag, and the conveying orienting roller 62 set at the conveying rear end drives the packaging bag to move forward so that it is stacked and collected between the stacking limit plates 221.

[0055] Based on the above, a limiting bracket 7 is further provided on the right side of the picking conveying box 3, and a limiting roller 71 is symmetrically provided at the bottom of the limiting bracket 7 and is rollingly connected to the top of the packaging bag negative pressure conveyor belt 4, and a limiting inclined surface and a limiting twill are provided on the surface of the limiting roller 71;

[0056] A further advantage of adopting the above method is that the limiting roller 71 is arranged before the touch rod 33 contacts the packaging bag. Through the limiting inclined surface and the limiting twill, the disordered packaging bags can be moved to the central part of the packaging bag negative pressure conveyor belt 4, avoiding the contact between the touch roller 34 and the sealing strip arranged in the packaging bag.

[0057] Working principle:

[0058] When the present invention performs direction conveying on the packaging bags placed in the picking and conveying box 3, it needs to go through two processes: the packaging bag receiving and identifying process and the packaging bag direction conveying process, wherein the packaging bag receiving and identifying process is: at the bottom of the picking and conveying box 3, the packaging bag is contacted by the upwardly moving packaging bag negative pressure conveyor belt 4, and the negative pressure air duct 52 generates an adsorption force on the packaging bag, driving the packaging bag to move down to the top of the packaging bag negative pressure conveyor belt 4, and is received by the packaging bag negative pressure conveyor belt 4; then, when the packaging bag moves to the hot-melt state identification position of the sealing strip through the picking bar 322, it contacts with the symmetrically arranged touch rods 33, so that the hot-melt offset angle of the packaging bag sealing strip is known through the conduction time of the touch switch between the two and the interval time recorded by the timer, and the hot-melt state of the sealing strip in the packaging bag is deduced, thereby achieving the effect of conveniently receiving the packaging bag and identifying the hot-melt state of the packaging bag sealing strip;

[0059] The directional conveying process of the packaging bag is as follows: after identifying the hot-melt state of the packaging bag sealing strip, when the packaging bag needs to be directionally conveyed, the conveying directional roller 62 corresponding to the hot-melt state of the sealing strip is controlled to descend and rotate, and the packaging bags with offset hot-melt parts of the sealing strip or inadequate hot-melt sealing, that is, the packaging bags with different thicknesses at symmetrical detection points of the sealing strip are removed and stacked on the stacking and collecting platform 22 on the rear side of the packaging bag negative pressure conveyor belt 4, and the packaging bags with hot-melt sealing strips that meet the standards are collected and stacked on the stacking and collecting platform 22 on the front side, thereby achieving the effect of directionally conveying the packaging bags.

[0060] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A food packaging bag directional conveying device, comprising a packaging bag conveying platform (1) for directional conveying of food packaging bags, characterized in that: The packaging bag conveying platform (1) is provided with a packaging bag conveying unit, the packaging bag conveying unit comprising a packaging bag conveying picking mechanism, a packaging bag conveying identification mechanism and a packaging bag conveying orientation mechanism. The packaging bag conveying picking mechanism is arranged at the conveying front section of the packaging bag conveying platform (1) and is used to pick up food packaging bags. The packaging bag conveying identification mechanism is arranged at the conveying middle section of the packaging bag conveying platform (1) and is used to identify the position of the sealing strip of the food packaging bag and the hot melt sealing state. The packaging bag conveying orientation mechanism is arranged at the conveying rear section of the packaging bag conveying platform (1) and is used to orientationally convey, stack and collect food packaging bags. The packaging bag conveying and picking mechanism comprises a picking conveying box (3) and a packaging bag negative pressure conveying belt (4) arranged on the top of the packaging bag conveying platform (1); a symmetrically arranged picking bracket (31) is installed at the bottom of the picking conveying box (3); a picking thickness adjustment plate (32) is arranged on the top of the picking bracket (31); the packaging bag negative pressure conveying belt (4) is driven by a servo motor (41); and a negative pressure sealing bracket (5) fixedly installed on the packaging bag conveying platform (1) is arranged inside the packaging bag negative pressure conveying belt (4); the negative pressure sealing bracket (5) forms a closed space through a negative pressure sealing plate (51), and the negative pressure sealing bracket (5) is connected to a negative pressure air duct (52); The packaging bag conveying identification mechanism comprises a sealing strip sensor arranged on the picking and conveying box (3), wherein the sealing strip sensor is composed of a touch rod (33), a touch switch and a timer; A downwardly inclined picking bar (322) is fixedly mounted on the side of the picking thickness adjustment plate (32); the touch rod (33) is fixed to the bottom of the picking bar (322) through a downward pressing spring (331) and maintains a downward pressing tendency; the touch rod (33) is rotatably connected to an empty-load detection wheel (333) through a detection shaft (332); an outer surface of the empty-load detection wheel (333) is provided with an empty-load sensing blade (334); the outer side of the touch rod (33) is rotatably connected to a touch roller (34) in contact with the top of the packaging bag conveyor platform (1); and the touch roller (34) is symmetrically arranged on the outer side of the empty-load detection wheel (333); The packaging bag conveying and orienting mechanism comprises a stacking bracket (2) arranged on the top of the packaging bag conveying platform (1), a stacking electric hydraulic cylinder (21) is arranged on the top of the stacking bracket (2), and a stacking collection platform (22) is arranged on the side of the stacking bracket (2) away from the packaging bag negative pressure conveyor belt (4), a stacking limit plate (221) is arranged on the top of the stacking collection platform (22), the stacking electric hydraulic cylinder (21) is connected to the conveying and orienting bracket (6) through a hydraulic connecting rod, and a stepping motor (61) is arranged on the side of the conveying and orienting bracket (6) away from the packaging bag negative pressure conveyor belt (4), and the stepping motor (61) contacts the top of the packaging bag negative pressure conveyor belt (4) through the conveying and orienting roller shaft (62); The inner wall of the packaging bag negative pressure conveyor belt (4) is provided with negative pressure adsorption holes (42), the top of the negative pressure sealing plate (51) is provided with a negative pressure driven adsorption hole groove, and the negative pressure driven adsorption hole groove is composed of densely arranged separation negative pressure holes (511) and a negative pressure detection hole (512) arranged at the initial conveying section of the packaging bag conveying platform (1); The negative pressure detection hole (512) is also arranged at a position corresponding to the bottom of the no-load sensing blade (334). At this time, a negative pressure environment of the negative pressure sealing plate (51) is formed through the existing negative pressure fan externally connected to the negative pressure air duct (52), and the air flow is guided to flow through the no-load sensing blade (334), driving the no-load detection wheel (333) to rotate. At this time, it indicates that the top of the packaging bag negative pressure conveyor belt (4) corresponding to the bottom of the no-load detection wheel (333) has not received a packaging bag. On the contrary, when the no-load detection wheel (333) stops rotating, it indicates that a packaging bag is placed on the top of the packaging bag negative pressure conveyor belt (4).

2. A food packaging bag directional conveying device according to claim 1, characterized in that: A picking drive slot (311) is provided between the two picking brackets (31), a picking limit hole (321) is provided between the picking thickness adjustment plate (32) and the picking bracket (31), and a picking roller (312) is provided on the top of the picking bracket (31).

3. The food packaging bag directional conveying device according to claim 1, characterized in that: The top of the negative pressure sealing plate (51) is provided with an arc-shaped conveying and receiving seat (53) whose inner wall is connected to the negative pressure air duct (52), and the arc-shaped conveying and receiving seat (53) is arranged in the picking drive groove (311).

4. The food packaging bag directional conveying device according to claim 1, characterized in that: A limiting bracket (7) is arranged on the right side of the picking and conveying box (3), and a limiting roller (71) is symmetrically arranged at the bottom of the limiting bracket (7) and is rollingly connected to the top of the packaging bag negative pressure conveyor belt (4), and a limiting inclined surface and a limiting twill are arranged on the surface of the limiting roller (71).

5. The food packaging bag directional conveying device according to claim 1, characterized in that: The stacking electric hydraulic cylinder (21) controls the downward movement of the transport directional bracket (6) through an infrared detector (23), and the transport directional bracket (6) is staggered at the bottom of the stacking bracket (2). The stepping motor (61) points to the stacking collection platform (22) staggered at the front and rear sides through the transport directional roller (62), and the outer surface of the transport directional roller (62) is provided with a transport spiral groove.

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