Horizontal paper bag waist-line-free bottom pasting mechanism

Abstract

The utility model belongs to the field of paper bag production equipment, and provides a horizontal paper bag waistline-free bottom pasting mechanism which comprises a rack, a conveying belt, a glue gun nozzle, a back guide rod, a bottom opening assembly and a folding assembly. Wherein the conveying belt is connected to the rack, and the target paper bag is provided with main body surfaces which are arranged in a stacked mode and folded lugs and negative sheet bodies which are connected to the main body surfaces respectively; the glue gun nozzles are arranged above the conveying belt at intervals and used for spraying glue on the surface, adjacent to the folded lugs, of the negative film body. The back guide rod is cylindrical, and the extending direction of the back guide rod is parallel to the feeding direction of the conveying belt; the bottom opening assembly comprises a conical head and bottom opening guide strips connected to the conical head in pairs, the folding assembly comprises a first bottom folding rod and a second bottom folding rod which can fold the negative film body to be flatly attached to the folding lugs, and the first bottom folding rod and the second bottom folding rod are sequentially arranged in the feeding direction of the conveying belt and are arranged side by side with the parts, parallel to the bottom opening guide strips, of the first bottom folding rod and the second bottom folding rod.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of paper bag production equipment, and particularly relates to a horizontal paper bag bottom pasting mechanism without waist line. BACKGROUND

[0002] In the production process of paper bags, bottom pasting is an important link. Due to design defects, the traditional paper bag bottom pasting equipment will form creases on the bag body and cause one or more obvious waist lines on the bottom of the paper bag during the bottom pasting process. The existence of the waist line not only affects the aesthetic appearance of the paper bag, but also may affect the load-bearing capacity and service life of the paper bag. Therefore, it is necessary to solve the above technical problems. SUMMARY

[0003] The purpose of the embodiment of the application is to provide a horizontal paper bag bottom pasting mechanism without waist line, so as to solve the technical problem that the paper bag is prone to produce waist line in the prior art.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the application is to provide a horizontal paper bag bottom pasting mechanism without waist line, comprising:

[0005] a rack;

[0006] a conveying belt connected to the rack and used for conveying target paper bags, the target paper bags having a main surface arranged in layers and a bottom sheet body and a folding ear respectively connected to the main surface, the folding ear being clamped between adjacent main surfaces, and the bottom sheet body being parallel to the main surface;

[0007] a glue gun nozzle arranged in pairs above the conveying belt and used for spraying glue on the surface of the bottom sheet body adjacent to the folding ear;

[0008] a back guide rod in a cylindrical shape and extending in a direction parallel to the feeding direction of the conveying belt, the back guide rod being arranged in parallel and spaced apart in at least two rows and distributed in a direction perpendicular to the conveying belt, an interval for the main surface to pass through being formed between adjacent back guide rods, and the folding ear and the bottom sheet body being located on the same side of all the back guide rods;

[0009] an open bottom assembly comprising a tapered head and a pair of open bottom guide strips connected to the tapered head, the tapered head forming a sharp end opposite to the feeding direction of the conveying belt and used for inserting between the bottom positions of adjacent main surfaces, the open bottom guide strips being arranged side by side with the back guide rods and cooperating with the back guide rods to form a passage for the folding ear and the bottom sheet body to pass through, and the open bottom guide strips being arranged in parallel after extending in a direction away from each other in a plane perpendicular to the conveying belt for a certain length;

[0010] The folding assembly comprises a first bottom folding rod and a second bottom folding rod capable of folding the bottom sheet body to be flat with the ear, the first bottom folding rod and the second bottom folding rod are arranged in parallel with the part of the opening bottom guide parallel to the feeding direction of the conveying belt.

[0011] Optionally, the folding assembly further comprises a flattening guide rod connected to the end of the second bottom folding rod and arranged in pairs in the feeding direction of the conveying belt.

[0012] The flattening guide rod is arranged in parallel after extending a length in the direction of approaching each other in the plane perpendicular to the conveying belt, and a channel is formed between adjacent flattening guide rods for the main surface to pass through, which is used to fold the bottom of the target paper bag.

[0013] Optionally, the folding assembly further comprises a pressure roller horizontally arranged above the conveying belt, and a gap is formed between the pressure roller and the conveying belt for the main surface to pass through.

[0014] The flattening guide rod and the pressure roller are sequentially distributed in the feeding direction of the conveying belt.

[0015] Optionally, the folding assembly further comprises a standing guide sheet arranged between the glue gun nozzle and the back guide rod.

[0016] The standing guide sheet gradually changes from extending in the horizontal direction to extending in the vertical direction in the feeding direction of the conveying belt, and a gap with a preset distance is formed between the standing guide sheet and the conveying belt to enable the end of the standing guide sheet close to the glue gun nozzle to be inserted between the upper bottom sheet body and the main surface during the conveying of the target paper bag by the conveying belt.

[0017] Optionally, the horizontal paper bag bottom gluing mechanism without waist line further comprises a roller support extending in the feeding direction of the conveying belt, and a plurality of bag pressing rollers connected to the roller support and uniformly distributed in the extension direction of the roller support.

[0018] The bag pressing roller and the conveying belt form a proper gap to cooperate with the conveying of the target paper bag by the conveying belt, and the part of the glue gun nozzle and the standing guide sheet extending in the horizontal direction are arranged in the feeding direction of the conveying belt overlapping the bag pressing roller.

[0019] Optionally, the horizontal paper bag bottom gluing mechanism without waist line further comprises a cross strut connected to the machine frame and horizontally arranged above the conveying belt.

[0020] The roller support is movably mounted on the cross strut and can move relative to the cross strut in the axial direction of the cross strut.

[0021] Optionally, the horizontal paper bag no-waistline bottom pasting mechanism further comprises a hopper arranged at the starting end of the conveying belt and a discharging guide rod connected at the discharging port of the hopper and arranged side by side with the bag pressing roller.

[0022] The discharging guide rod extends in the direction gradually approaching the conveying belt for a certain length and then extends in the direction parallel to the conveying belt.

[0023] Optionally, the horizontal paper bag no-waistline bottom pasting mechanism further comprises a plurality of guide rollers arranged at the starting end of the conveying belt and evenly arranged along the feeding direction of the conveying belt.

[0024] The guide rollers are arranged below the conveying belt and the bearing width of the guide rollers is greater than the width of the conveying belt, and the guide rollers are further arranged in a spaced manner with the bottom opening guide strip.

[0025] Optionally, the horizontal paper bag no-waistline bottom pasting mechanism further comprises a limiting strip movably arranged on the rack and capable of moving relative to the rack in the width direction of the conveying belt.

[0026] The limiting strip extends along the feeding direction of the conveying belt and is arranged in an overlapping manner with the guide rollers in the feeding direction of the conveying belt.

[0027] The horizontal paper bag no-waistline bottom pasting mechanism has the beneficial effect that, compared with the prior art, the conveying belt can be used to convey the target paper bag with the ear clamps arranged between the body surfaces. After the conveying belt drives the target paper bag to pass through the glue gun nozzle and the target paper bag is sprayed with glue on the surface of the bottom sheet body adjacent to the ear by the glue gun nozzle, the ear and the bottom sheet body can be located on the same side of all the back guide rods through the interval between adjacent back guide rods. Since the tip formed by the taper head in the bottom opening assembly can be inserted between the bottom positions of adjacent body surfaces and the bottom opening guide strip connected to the taper head and arranged side by side with the back guide rod extends in the direction away from each other for a certain length in the plane perpendicular to the conveying belt and then arranged in parallel to each other, the part of the body surface bottom positions arranged between the back guide rod and the bottom opening guide strip and arranged in a stacked manner will be gradually opened by the taper head and the bottom opening guide rod during the movement of the conveying belt. In this way, the ear clamps arranged between the body surfaces can be exposed and flatly attached to the bottom sheet body that has been sprayed with glue under the folding action of the first bottom folding rod and the second bottom folding rod to complete the bottom pasting. Since the bottom opening guide rod and the back guide rod act as a supporting structure during the folding of the bottom sheet body, and since the back guide rod has a cylindrical structure with the extending direction parallel to the feeding direction of the conveying belt, the back guide rod will not form obvious creases on the body surface when supporting the body surface. Therefore, the horizontal paper bag no-waistline bottom pasting mechanism provided in the present embodiment will not form a waistline on the bottom of the paper bag during the bottom pasting operation of the target paper bag, which is much better than the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] Figure 1 This is a schematic diagram of the main structure of the waistline-free bottom gluing mechanism for a horizontal paper bag in an embodiment of the present application;

[0030] Figure 2 This is a schematic top view of the structure of the waistline-free bottom gluing mechanism for a horizontal paper bag in an embodiment of the present application;

[0031] Figure 3 for Figure 1 A magnified view of the structure at center A;

[0032] Figure 4 for Figure 1 A magnified view of the structure at point B in the middle;

[0033] Figure 5 for Figure 1 A magnified view of the structure at point C in the middle;

[0034] Figure 6 Schematic diagram of the bottom gluing process of the target paper bag in the embodiment of the present application;

[0035] Figure 7 For the target paper bag in the embodiment of this application Figure 4 Side view of the C1 process;

[0036] Figure 8 For the target paper bag in the embodiment of this application Figure 4 Side view of the D1 process.

[0037] 10. The reference numerals in the figure are: 100, frame; 101, conveyor belt; 102, glue gun nozzle; 103, back guide rod; 104, cone head; 105, bottom guide strip; 106, first folding bottom rod; 107, second folding bottom rod; 108, leveling guide rod; 109, pressure roller; 110, standing guide plate; 111, roller bracket; 112, bag pressing roller; 113, cross support; 114, silo; 115, discharge guide rod; 116, guide roller; 117, limit strip; 200, target paper bag; 201, main body surface; 202, folding ear; 203, bottom film body. DETAILED DESCRIPTION

[0038] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application and not to limit the present application.

[0039] It should be noted that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element.

[0040] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0041] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0042] Please refer to Figures 1 to 8 , a horizontal paper bag no waist line paste bottom mechanism provided by the embodiment of the present application will be described. The horizontal paper bag no waist line paste bottom mechanism includes a rack 100, a conveying belt 101, a glue gun nozzle 102, a back guide rod 103, an open bottom assembly and a folding assembly. Among them:

[0043] The conveying belt 101 is connected to the frame 100 and used to convey the target paper bag 200, the target paper bag 200 has the body surface 201 arranged in a stack, and the fold ear 202 and the bottom sheet body 203 connected to the body surface 201 respectively, the fold ear 202 is clamped between the adjacent body surface 201, and the bottom sheet body 203 is parallel to the body surface 201; the glue gun nozzle 102 is arranged in an interval above the conveying belt 101 and used to spray glue on the surface of the bottom sheet body 203 adjacent to the fold ear 202; the back guide rod 103 is cylindrical and extends in a direction parallel to the feeding direction of the conveying belt 101, the back guide rod 103 is arranged in parallel in at least two intervals and distributed in a direction perpendicular to the conveying belt 101, the interval for the body surface 201 to pass through is formed between the adjacent back guide rods 103, and the fold ear 202 and the bottom sheet body 203 are all located on the same side of all the back guide rods 103; the opening bottom assembly includes the taper head 104 and the pair of opening bottom guide strips 105 connected to the taper head 104, the taper head 104 forms a sharp end opposite to the feeding direction of the conveying belt 101 and used to be inserted between the bottom positions of the adjacent body surfaces 201, the opening bottom guide strip 105 is arranged side by side with the back guide rod 103 and cooperates with the back guide rod 103 to form a channel for the fold ear 202 and the bottom sheet body 203 to pass through, the opening bottom guide strip 105 is arranged in parallel after extending in a direction away from each other in a plane perpendicular to the conveying belt 101 for a certain length; the folding assembly includes the first fold bottom rod 106 and the second fold bottom rod 107 capable of folding the bottom sheet body 203 to be flat with the fold ear 202, the first fold bottom rod 106 and the second fold bottom rod 107 are arranged side by side along the part of the first fold bottom rod 106 and the second fold bottom rod 107 parallel to the opening bottom guide strip 105 in the feeding direction of the conveying belt 101 in sequence.

[0044] According to the above structure provided in the present embodiment, in the horizontal paper bag no waistline bottom pasting mechanism provided in the present embodiment, the target paper bag 200 is horizontally placed in the hopper 114 during use, wherein the bottom position of the main surface 201 connected with the folding ear 202 is in a stacked state (i.e. the bottom is in a closed flat state) and a bottom sheet body 203 above the main surface 201 is folded on the main surface 201, and the other bottom sheet body 203 is parallel to the main surface 201. The conveying belt 101 can be used to convey the target paper bag 200 with the folding ear 202 clamped between the main surface 201. When the conveying belt 101 drives the target paper bag 200 to pass through the glue gun nozzle 102 and the glue gun nozzle 102 sprays glue on the surface of the bottom sheet body 203 adjacent to the folding ear 202, the target paper bag 200 can pass through the interval between the adjacent back guide rods 103 and make the folding ear 202 and the bottom sheet body 203 all located on the same side of all the back guide rods 103. Since the tip formed by the taper head 104 in the opening bottom assembly can be inserted between the bottom positions of the adjacent main surfaces 201 and the opening bottom guide strip 105 connected to the taper head 104 and arranged side by side with the back guide rods 103 extends in the direction away from each other in the plane perpendicular to the conveying belt 101 to a certain length and then arranged parallel to each other, the bottom positions of the main surfaces 201 located between the back guide rods 103 and the opening bottom guide strip 105 and arranged in a stacked manner will be gradually opened during the movement of the conveying belt 101 by the combined action of the taper head 104 and the opening bottom guide strip 105. In this way, the folding ear 202 clamped between the main surfaces 201 can be exposed and flatly attached to the bottom sheet body 203 that has been sprayed with glue under the folding action of the first bottom folding rod 106 and the second bottom folding rod 107 to complete the bottom pasting. Since the opening bottom guide strip 105 and the back guide rod 103 act as a support structure during the folding of the bottom sheet body 203, and the back guide rod 103 is in the form of a cylindrical structure with the extension direction parallel to the feeding direction of the conveying belt 101, the back guide rod 103 will not cause obvious creases on the main surface 201 when supporting the main surface 201. Therefore, the horizontal paper bag no waistline bottom pasting mechanism provided in the present embodiment will not form a waistline on the bottom of the paper bag during the bottom pasting operation of the target paper bag 200, which is much better than the prior art.

[0045] In another embodiment of the present application, please refer to Figures 1 to 8, the folding assembly further comprises a pair of flattening guide rods 108 connected to the end of the second bottom folding rod 107 and arranged in pairs along the feeding direction of the conveying belt 101; the flattening guide rods 108 are arranged in parallel after extending in the direction of approaching each other in the plane perpendicular to the conveying belt 101 for a certain length (i.e. the front end of the flattening guide rods 108 is in the shape of a horn opening towards the bag opening of the target paper bag 200 and inclined to the direction away from the main surface 201), and a channel for the main surface 201 to pass through is formed between the adjacent flattening guide rods 108, which is used to fold the bottom of the target paper bag 200 in half to make the bottom sheet body 203 and the bag bottom formed by the adhesion of the bottom sheet body 203 and the ear 202 fold in half and overlap from the middle, so as to restore the flat and overlapped state of the main surface 201. According to the above structure provided in the embodiment, after the bottom sheet body 203 is attached to the ear 202 through the first bottom folding rod 106 and the second bottom folding rod 107, the ear 202 can be re-folded and clamped between the adjacent main surfaces 201 under the guidance of the flattening guide rods 108, which can further avoid the waist line on the main surface 201 and facilitate the target paper bag 200 to have a more flat main surface 201. It can be understood that in actual production, the distance between the parallel parts of the flattening guide rods 108 can be flexibly adjusted according to the thickness of the target paper bag 200 to realize the flattening of the main surface 201, which will not be described in detail here.

[0046] In another embodiment of the present application, please refer to Figures 1 to 8 , the folding assembly further comprises a pressing roller 109 arranged above the conveying belt 101, and a space for the main surface 201 to pass through is formed between the pressing roller 109 and the conveying belt 101; the flattening guide rods 108 and the pressing roller 109 are arranged in sequence along the feeding direction of the conveying belt 101. According to the above structure provided in the embodiment, the pressing roller 109 arranged above the conveying belt 101 can cooperate with the conveying belt 101 to press and flatten the main surface 201 of the target paper bag 200, which can more effectively avoid the waist line on the main surface 201 and facilitate the target paper bag 200 to have a more flat main surface 201.

[0047] In another embodiment of the present application, please refer to Figures 1 to 8 , the folding assembly further comprises a standing guide sheet 110 arranged between the glue gun nozzle 102 and the back guide rod 103; the standing guide sheet 110 gradually changes from extending in the horizontal direction to extending in the vertical direction along the feeding direction of the conveying belt 101, and a space with a preset distance is formed between the standing guide sheet 110 and the conveying belt 101 to enable the end of the standing guide sheet 110 close to the glue gun nozzle 102 to be inserted between the bottom sheet body 203 and the main surface 201 during the conveying of the target paper bag 200 by the conveying belt 101, and here, the glue gun nozzle 102 and its arrangement can adopt the prior art.

[0048] According to the above structure provided in the embodiment, the standing guide 110 between the upper bottom sheet body 203 and the main body surface 201 can make the bottom sheet body 203 gradually change from parallel to the main body surface 201 to vertical to the main body surface 201 according to the shape of the target paper bag 200 during the movement of the target paper bag 200 along the conveying belt 101, so that the bottom sheet body 203 can pass through the interval between the back guide rod 103 and the opening bottom guide strip 105 more smoothly and use the opening bottom guide strip 105 as a folding support structure, which is beneficial to make the horizontal paper bag bottom pasting mechanism without waist line in the embodiment achieve better bottom pasting effect, which is much better than the prior art. In addition, it should be noted that in actual production, the bottom sheet body 203 on one side can naturally sag under the action of gravity, so the standing guide 110 can be provided with only one and used for the bottom sheet body 203 whose gravity center needs to be raised during vertical movement, which can also play a role in simplifying the structure and reducing the production cost.

[0049] In another embodiment of the present application, please refer to Figures 1 to 8 , the horizontal paper bag bottom pasting mechanism without waist line further comprises a roller support 111 extending along the feeding direction of the conveying belt 101, and a plurality of bag pressing rollers 112 connected to the roller support 111 and uniformly distributed along the extension direction of the roller support 111; the bag pressing rollers 112 and the conveying belt 101 form appropriate intervals to cooperate with the conveying belt 101 to convey the target paper bag 200, and the part of the glue gun nozzle 102 and the standing guide 110 extending in the horizontal direction are arranged to overlap the bag pressing rollers 112 in the feeding direction of the conveying belt 101. According to the above structure provided in the embodiment, the bag pressing rollers 112 connected to the roller support 111 can cooperate with the conveying belt 101 to convey the target paper bag 200 and form a more stable conveying effect of the target paper bag 200, so that the glue gun nozzle 102 and the standing guide 110 arranged to overlap the bag pressing rollers 112 can accurately spray glue on the target paper bag 200 and make the bottom sheet body 203 stand more stably, respectively, which is beneficial to make the horizontal paper bag bottom pasting mechanism without waist line in the embodiment achieve further bottom pasting effect.

[0050] In another embodiment of the present application, please refer to Figures 1 to 8 , the horizontal paper bag bottom pasting mechanism without waist line further comprises a cross support 113 connected to the rack 100 and transversely arranged above the conveying belt 101; the roller support 111 is movably mounted on the cross support 113 and can move relative to the cross support 113 along the axial direction of the cross support 113. According to the above structure provided in the embodiment, the roller support 111 movably mounted on the cross support 113 can flexibly adjust the position of the bag pressing rollers 112, which is beneficial to make the horizontal paper bag bottom pasting mechanism without waist line in the embodiment applicable to more specifications and sizes of paper bag bottom pasting operation and achieve more flexible application effect.

[0051] In another embodiment of the present application, please refer to Figures 1 to 8 , the horizontal paper bag no waist line paste bottom mechanism also includes a hopper 114 disposed at the beginning of the conveyor belt 101 and a discharge guide rod 115 connected to the discharge port of the hopper 114 and arranged side by side with the bag pressing roller 112; the discharge guide rod 115 extends a certain length in the direction gradually close to the conveyor belt 101 in the plane of the vertical conveyor belt 101 and then extends in the direction parallel to the conveyor belt 101. According to the above structure provided in this embodiment, the discharge guide rod 115 connected to the discharge port of the hopper 114 can make the target paper bag 200 placed in the hopper 114 more smoothly enter the space between the bag pressing roller 112 and the conveyor belt 101, and the bottom sheet body 203 located above is kept flat with the main body surface 201 (see Figure 2 , at this time, the other bottom sheet body 203 is in the extension direction parallel to the main body surface 201 and is supported by the guide roller 116) to facilitate the glue gun nozzle 102 to spray glue on the bottom sheet body 203, which is conducive to further improve the paste bottom stability of the horizontal paper bag no waist line paste bottom mechanism to the target paper bag 200 in this embodiment.

[0052] In another embodiment of the present application, please refer to Figures 1 to 8 , the horizontal paper bag no waist line paste bottom mechanism also includes a plurality of guide rollers 116 arranged in sequence and uniformly along the feeding direction of the conveyor belt 101 at the beginning of the conveyor belt 101; the guide rollers 116 are disposed below the conveyor belt 101 and the bearing width of the guide rollers 116 is greater than the width of the conveyor belt 101, and the guide rollers 116 are also arranged in intervals with the open bottom guide strip 105. According to the above structure provided in this embodiment, the guide rollers 116 disposed below the conveyor belt 101 can make the target paper bag 200 be more stably conveyed, especially for supporting one of the bottom sheet bodies 203. Since the guide rollers 116 are also arranged in intervals with the open bottom guide strip 105, see Figure 2 , the last guide roller 116 arranged in the conveying direction of the target paper bag 200 has a gap with the front edge of the taper head 104 of the open bottom guide strip 105, so that when the bottom sheet body 203 is unfolded under the action of the open bottom guide strip 105, the downward unfolded bottom sheet body 203 can be unfolded downward without interference since it has left the area of the guide roller 116, and the open bottom action is completed, that is, the above arrangement does not affect the unfolding of the bottom sheet body 203, which is conducive to further improve the paste bottom stability of the horizontal paper bag no waist line paste bottom mechanism to the target paper bag 200 in this embodiment.

[0053] In another embodiment of the present application, please refer to Figures 1 to 8The horizontal paper bag no-waist-line bottom pasting mechanism further comprises a limiting strip 117 movably mounted on the frame 100 and capable of moving relative to the frame 100 along the width direction of the conveying belt 101; the limiting strip 117 extends along the feeding direction of the conveying belt 101 and is arranged in overlapping manner with the guide roller 116 in the feeding direction of the conveying belt 101. According to the above structure provided in the embodiment, the limiting strip 117 movably mounted on the frame 100 can make different specifications and sizes of the target paper bag 200 applicable to the horizontal paper bag no-waist-line bottom pasting mechanism in the embodiment, so as to facilitate the horizontal paper bag no-waist-line bottom pasting mechanism provided in the embodiment to be applicable to paper bag bottom pasting operations of more specifications and sizes and achieve more flexible application effect.

[0054] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A horizontal paper bag without waistline gluing mechanism, characterized in that: include: rack(100); A conveyor belt (101) is connected to the frame (100) and is used to convey a target paper bag (200), wherein the target paper bag (200) has a main body surface (201) arranged in a stacked manner, and folded ears (202) and a bottom sheet (203) respectively connected to the main body surface (201), wherein the folded ears (202) are sandwiched between adjacent main body surfaces (201), and the bottom sheet (203) is parallel to the main body surface (201); a glue gun nozzle (102), spaced apart above the conveyor belt (101) and used for spraying glue on the surface of the bottom film body (203) adjacent to the folded ear (202); The back guide rod (103) is cylindrical and extends in a direction parallel to the feeding direction of the conveyor belt (101). At least two back guide rods (103) are arranged in parallel and spaced apart and distributed in a direction perpendicular to the conveyor belt (101). Spaces are formed between adjacent back guide rods (103) for the main body surface (201) to pass through, and the folding ears (202) and the bottom sheet body (203) are all located on the same side of all the back guide rods (103); An open bottom assembly, comprising a cone head (104) and a pair of open bottom guide bars (105) connected to the cone head (104), wherein the cone head (104) forms a tip opposite to the feeding direction of the conveyor belt (101) and is used to be inserted between the bottom positions of the adjacent main body surface (201), the open bottom guide bar (105) and the back guide rod (103) are arranged side by side and cooperate with the back guide rod (103) to form a channel for the folding ear (202) and the bottom sheet body (203) to pass through, and the open bottom guide bars (105) are extended to a set length in a direction away from each other in a plane perpendicular to the conveyor belt (101) and then arranged parallel to each other; The folding assembly comprises a first folding bottom rod (106) and a second folding bottom rod (107) capable of folding the bottom sheet (203) to be flush with the folding ear (202), wherein the first folding bottom rod (106) and the second folding bottom rod (107) are arranged in sequence along the feeding direction of the conveyor belt (101) and are arranged side by side with the parts parallel to each other with the bottom opening guide bar (105).

2. The horizontal paper bag bottom gluing mechanism without waistline according to claim 1, characterized in that: The folding assembly further includes a leveling guide rod (108) connected to the end of the second folding bottom rod (107) along the feeding direction of the conveyor belt (101) and arranged in pairs; The re-leveling guide rods (108) are arranged parallel to each other after extending a set length in a direction approaching each other in a plane perpendicular to the conveyor belt (101), and a channel for the main body surface (201) to pass through is formed between adjacent re-leveling guide rods (108), which is used to fold the opened bottom of the target paper bag (200) in half.

3. The waistline-free bottom gluing mechanism for horizontal paper bags according to claim 2, characterized in that: The folding assembly further comprises a pressure roller (109) disposed transversely above the conveyor belt (101), wherein a gap is formed between the pressure roller (109) and the conveyor belt (101) for the main body surface (201) to pass through; The leveling guide rod (108) and the pressure roller (109) are distributed in sequence along the feeding direction of the conveyor belt (101).

4. The horizontal paper bag bottom gluing mechanism without waistline according to claim 1, characterized in that: The folding assembly further comprises a standing guide piece (110) arranged between the glue gun nozzle (102) and the back guide rod (103); The standing guide (110) gradually transitions from extending in the horizontal direction to extending in the vertical direction in the feeding direction of the conveyor belt (101), and a preset distance is formed between the standing guide (110) and the conveyor belt (101) so that the end of the standing guide (110) close to the glue gun nozzle (102) can be inserted between the upper bottom film body (203) and the main body surface (201) during the process of the target paper bag (200) being conveyed by the conveyor belt (101).

5. The horizontal paper bag bottom gluing mechanism without waistline according to claim 4, characterized in that: The horizontal paper bag bottom gluing mechanism without waistline further comprises a roller bracket (111) extending along the feeding direction of the conveyor belt (101) and a plurality of bag pressing rollers (112) connected to the roller bracket (111) and uniformly distributed in sequence along the extending direction of the roller bracket (111); An appropriate gap is formed between the bag pressing roller (112) and the conveyor belt (101) to cooperate with the conveyor belt (101) in conveying the target paper bag (200), and the horizontally extending parts of the glue gun nozzle (102) and the standing guide (110) are both arranged to overlap with the bag pressing roller (112) in the feeding direction of the conveyor belt (101).

6. The waistline-free bottom gluing mechanism for horizontal paper bags according to claim 5, characterized in that: The horizontal paper bag bottom gluing mechanism without waistline further comprises a transverse support (113) connected to the frame (100) and placed transversely above the conveyor belt (101); The roller bracket (111) is movably mounted on the transverse pillar (113) and is capable of moving relative to the transverse pillar (113) along the axial direction of the transverse pillar (113).

7. The waistline-free bottom gluing mechanism for horizontal paper bags according to claim 6, characterized in that: The horizontal paper bag bottom gluing mechanism without waistline further comprises a hopper (114) arranged at the starting end of the conveyor belt (101) and a discharge guide rod (115) connected to the discharge port of the hopper (114) and arranged side by side with the bag pressing roller (112); The discharge guide rod (115) extends for a set length in a direction gradually approaching the conveyor belt (101) in a plane perpendicular to the conveyor belt (101), and then extends in a direction parallel to the conveyor belt (101).

8. The waistline-free bottom gluing mechanism for a horizontal paper bag according to any one of claims 1 to 7, characterized in that: The horizontal paper bag bottom gluing mechanism without waistline further comprises a plurality of guide rollers (116) arranged at the starting end of the conveyor belt (101) and arranged uniformly in sequence along the feeding direction of the conveyor belt (101); The guide roller (116) is arranged below the conveyor belt (101) and the bearing width of the guide roller (116) is greater than the width of the conveyor belt (101). The guide roller (116) is also spaced apart from the open-bottom guide strip (105).

9. The waistline-free bottom gluing mechanism for a horizontal paper bag according to claim 8, characterized in that: The horizontal paper bag bottom gluing mechanism without waistline further comprises a limiting strip (117) movably mounted on the frame (100) and capable of moving relative to the frame (100) along the width direction of the conveyor belt (101); The limiting strip (117) extends along the feeding direction of the conveyor belt (101) and is arranged to overlap with the guide roller (116) in the feeding direction of the conveyor belt (101).

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