A device for covering a combination firework

Abstract

The application discloses a kind of combined fireworks's covering device, including step-feeding mechanism, step-feeding mechanism drives combined fireworks sequentially through first gluing mechanism, top and bottom invitation covering mechanism, then enter posture converter and convert into vertical state, then enter surrounding invitation covering mechanism.Step-feeding mechanism includes slide and compression wheel group, combined fireworks is driven along slide by telescopic poking member and step forward;First gluing mechanism and top and bottom invitation covering mechanism glue two ends of combined fireworks in horizontal state simultaneously and complete the covering of top invitation and bottom invitation;Surrounding invitation covering mechanism includes surrounding invitation conveying assembly, negative pressure adsorption vertical plate, mobile sealing member, fixed sealing member and swing sealing member.Working reliably, mechanism is simplified, process is compact, work is smooth;No need to use adhesive tape to assist covering;Can adapt to multiple specifications of combined fireworks covering;Can complete feeding without relying on mutual pushing between combined fireworks;Effectively improve the applicability of equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of packaging equipment, specifically a kind of combined fireworks' cover device. BACKGROUND

[0002] After the combined fireworks product is formed, the product needs to be packaged (inner packaging, also commonly known as cover in the industry), i.e., a plastic, paper, etc. with good moisture resistance is pasted on the surface of the product for closed packaging. This packaging material is commonly known as invitation paper in the industry. According to the pasting position on the combined fireworks product, invitation paper can be divided into three types: top invitation paper pasted on the top surface of the product, bottom invitation paper pasted on the bottom surface of the product, and surrounding invitation paper pasted around the side surface of the product. In processing, the bottom invitation paper and the top invitation paper are first packaged, which generally involves pasting the surrounding invitation paper on the four side walls of the product, with the surrounding invitation paper covering the pasting periphery of the bottom invitation paper and the top invitation paper on the side walls of the product.

[0003] In the prior art, some devices have been developed in the industry to attempt to achieve automatic packaging processing of invitation paper:

[0004] such as the utility model patent document "Fireworks packaging equipment" with authorized announcement number CN 206944837 U,

[0005] the invention patent document "Side surrounding paper packaging structure of combined fireworks full-automatic packaging machine" with application publication number CN109059677A,

[0006] the invention patent document "Upper and lower paper pasting structure of combined fireworks full-automatic packaging machine" with application publication number CN109204928A,

[0007] the invention patent document "Combined fireworks full-automatic packaging machine" with application publication number CN109264077A,

[0008] the Chinese utility model patent document "Fireworks and gunpowder production gun barrel packaging machine" with authorized announcement number CN 209485161U,

[0009] the Chinese invention patent document "Tunnel-type combined fireworks invitation paper wrapping device" with application publication number CN 113734518A, etc.

[0010] The main drawback of the prior art is low work reliability, which is difficult to promote and use. SUMMARY

[0011] In order to solve the above-mentioned defects, the technical problem to be solved by the present application is to provide a skin device for combined fireworks, which effectively improves the working reliability. In order to solve the above-mentioned technical problem, the technical scheme adopted by the present application is that a skin device for combined fireworks, characterized in that it comprises a step feeding mechanism, the step feeding mechanism drives the combined fireworks to pass through a first glue applying mechanism, a top and bottom invitation covering mechanism in turn, and then enters an attitude converter to convert into an upright state, and then enters a surrounding invitation covering mechanism, wherein,

[0012] The step feeding mechanism comprises a slide for supporting the combined fireworks in a horizontal lying state, and a compression wheel set corresponding to the combined fireworks is arranged above the slide; the slide is provided with a poking member for driving the combined fireworks to step forward along the slide, the poking member is provided with an extension assembly, and the poking member is connected with a step driver; when the poking member is extended, it drives the combined fireworks to step forward, and when the poking member is retracted, it is reset to the starting point of the step;

[0013] The glue applying head of the first glue applying mechanism rotates around the glue applying part of the combined fireworks in the horizontal lying state to complete the glue applying work;

[0014] The top and bottom invitation covering mechanism comprises two frame bodies respectively located at the two end sides of the combined fireworks in the horizontal lying state, and further comprises a top invitation roll and its roll opening assembly and cutter assembly, a bottom invitation roll and its roll opening assembly and cutter assembly, and the long strip-shaped top invitation or bottom invitation is rolled to form the top / bottom invitation roll,

[0015] The roll opening assembly pulls the top / bottom invitation through the combined fireworks and the frame bodies; the two frame bodies move towards the bottom end or the top end of the combined fireworks to complete the covering of the top invitation and the bottom invitation at the same time; when the two frame bodies move towards the combined fireworks, the cutter assembly cuts off the top invitation and the bottom invitation;

[0016] The attitude converter comprises a box body for loading the combined fireworks, the box body has a feeding opening and a discharging opening, the box body can be rotated by 90 degrees in forward and reverse directions to switch between a feeding state and a discharging state, in the feeding state, the feeding opening of the box body faces the slide and is connected with the slide, and the combined fireworks in the horizontal lying state enters the box body from the feeding opening; the box body is rotated by 90 degrees to the discharging state, so that the combined fireworks is converted into an upright posture, and a pushing device pushes the combined fireworks in the upright posture to enter a connection station from the discharging opening;

[0017] The surrounding invitation covering mechanism comprises a surrounding invitation conveying assembly and negative pressure adsorption vertical plates. The surrounding invitation conveying assembly comprises a tray, and pre-cut surrounding invitations are stacked in the tray for standby. A lifting type moving suction plate sends the surrounding invitations in the tray to a conveying belt. A second gluing mechanism is arranged above the conveying belt. Two negative pressure vertical plates and a covering station entrance are connected below the end of the conveying belt. The covering station entrance is located between the two negative pressure vertical plates. A paper pressing piece is arranged on the working surface of each negative pressure vertical plate. The paper pressing piece reciprocates linearly towards the negative pressure vertical plate. The covering station comprises a moving sealing piece and a fixed sealing piece arranged on both sides of the combined firework respectively. A swing sealing piece is arranged beside the fixed sealing piece.

[0018] The conveying belt sends the surrounding invitations to the two negative pressure vertical plates and the covering station entrance in a vertical state. The paper pressing piece moves towards the negative pressure vertical plate and presses on the surrounding invitations. The first material pushing device of the surrounding invitation directly pushes the combined firework on the connection station through the covering station entrance against the surrounding invitation into the covering station. When entering, the surrounding invitation is pulled and covered on the three sides of the combined firework. The moving sealing piece moves and pushes the first end of the surrounding invitation to cover the fourth side of the combined firework. When the second material pushing device of the surrounding invitation transversely pushes the combined firework in the covering station to the discharging channel, the fixed sealing piece and the swing sealing piece cover and lap the second end of the surrounding invitation on the first end to complete the sealing.

[0019] The moving sealing piece, the fixed sealing piece and the swing sealing piece can be a rubber strip, a plate body or a roller body corresponding to the width of the surrounding invitation, especially elastic and / or rotatable. Preferably, the working surface of the roller body (such as a rubber roller) is elastic, and the two ends of the roller body are provided with rotating shafts.

[0020] Preferably, at least one paper pressing piece is provided with a translation driving piece. The translation driving piece drives the paper pressing piece to reciprocate linearly along the working surface of the negative pressure vertical plate. The surrounding invitation adsorbed on the negative pressure vertical plate is realized to have a soothing effect.

[0021] Preferably, transition rollers are arranged on both sides of the covering station entrance. The working reliability and covering effect are improved. The transition rollers can also be rubber strips, plate bodies, etc. corresponding to the width of the surrounding invitation.

[0022] Preferably, the fixed sealing piece and the swing sealing piece are located on one side of the inlet of the discharging channel. Correspondingly, transition rollers are arranged on the other side of the inlet of the discharging channel. The working reliability and covering effect are improved.

[0023] Preferably, the rotating shafts at both ends of the swing sealing piece are installed in swing guide grooves. The rotating shafts are hinged to the free ends of swing arms. The roots of the swing arms are hinged to the rotating shafts of the fixed sealing piece. The middle parts of the swing arms are connected to one end of a spring. The other end of the spring is connected to a rack. The swing sealing piece can swing around the fixed sealing piece and apply elastic pressure to the side of the combined firework through the spring. The surrounding invitation and the combined firework are pressed and glued when the combined firework passes.

[0024] Preferably, the pressure wheel set is provided with a height adjusting assembly. Thus, the height between the slide and the pressure wheel set is adjusted to adapt to different specifications of the combined fireworks. The pressure wheel corresponding to the work station of the first glue applying mechanism and the work station of the top and bottom envelope covering mechanism is provided with a pressure adjusting assembly. Preferably, a follow-up paper fixing member is arranged behind the envelope covering work station. The movement direction of the follow-up paper fixing member is opposite to that of the first pushing device. The follow-up paper fixing member extends to the entrance of the envelope covering work station and is arranged on the back of the combined fireworks. When the first pushing device pushes forward, the follow-up paper fixing member retracts synchronously.

[0025] Preferably, the frame is composed of four rollers. The two ends of the rollers are provided with circular truncated cone shaped ends with gradually increasing diameters. The circular truncated cone shaped ends of the adjacent two rollers are spliced to make the four corners of the inner circle of the frame circular. When the frame presses the envelope to make it close to the combined fireworks, the angular velocity of the whole roller is the same during rotation, but the linear velocity of the circular truncated cone shaped end increases with the increase of the diameter. The circular corners of the inner circle of the frame formed by the circular truncated cone shaped ends can pull the envelope to form small wrinkles during rotation, which are combined and pasted on the circular corners of the combined fireworks, avoiding large wrinkles and protrusions, effectively improving the envelope covering effect on the circular corners of the combined fireworks and improving the packaging quality. Further, the outer periphery of the circular truncated cone shaped end is provided with a chamfer. The adjacent two rollers are spliced through the chamfer to make the four corners of the inner circle of the frame circular. The thickness of the splicing part is effectively increased to make it more durable.

[0026] Preferably, the glue applying head of the first glue applying mechanism is connected to the storage container of the pressure gas and the glue through pipelines respectively. A rotating sleeve is arranged on the pipeline. The rotating sleeve includes an outer tube and an inner tube fixedly sleeved in the outer tube. The gap between the inner wall of the outer tube and the outer wall of the inner tube forms a pressure gas passage. The inner cavity of the inner tube forms a glue passage. The outer wall of the outer tube is provided with an inlet and an outlet of the pressure gas passage. The inlet is connected to the storage container of the pressure gas through a first rotating sealing joint. The outlet is communicated with a rotating element. The inlet end of the inner tube is connected to the storage container of the glue through a second rotating sealing joint. The outlet end of the inner tube is communicated with the rotating element. The conveying pipelines of the pressure gas and the glue can be effectively prevented from being wound due to rotation.

[0027] Further, the rotating sleeve is driven to rotate by a driving wheel fixedly sleeved on the outer wall of the outer tube. The structure is compact and the work is reliable.

[0028] Further, the glue applying head is connected to the rotating sleeve through a crank arm. Thus, the two are synchronously rotated. Further, the crank arm is provided with a rotating radius adjusting assembly. Thus, the rotating radius of the glue applying head is adjusted according to the specifications of the combined fireworks.

[0029] Further, the rotating sleeve is installed on the elevator frame through a bearing. The adjustment is convenient.

[0030] The present application has the advantages of reliable operation, simple mechanism, compact process, smooth operation, no need of using adhesive tape to assist in covering, adjustment according to the specifications of combined fireworks to adapt to various specifications of combined fireworks cover, completion of feeding without relying on mutual pushing of combined fireworks, and effective improvement of the applicability of the equipment.

[0031] Of course, implementing any product of the present application does not necessarily need to achieve all the advantages described above at the same time.

[0032] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as understood by those skilled in the art to which the present application belongs. The term "and / or" used herein includes any and all combinations of one or more related listed items. When an element is referred to as being "fixed to" another element, it can be directly on the other element or there can be a mediating element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or a mediating element can be present at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0033] Embodiment 1 drawing:

[0034] Figure 1 It is a first perspective view of the whole machine;

[0035] Figure 2 It is a second perspective view of the whole machine;

[0036] Figure 3 It is a structural schematic view of the combined fireworks conveying mechanism;

[0037] Figure 4 It is a structural schematic view of the toggle at the step end point;

[0038] Figure 5 It is a structural schematic view of the toggle at the step start point;

[0039] Figure 6 It is a structural schematic view of the rotating sleeve of the sizing mechanism;

[0040] Figure 7 It is an internal principle structure schematic view (front view) of the sizing mechanism;

[0041] Figure 8 A schematic diagram of the operating trajectory of the dispensing head (side view);

[0042] Figure 9 This is a schematic diagram of the overall structure of the adhesive application mechanism;

[0043] Figure 10 This is a schematic diagram of the top and bottom covering mechanism;

[0044] Figure 11 This is a partial structural diagram of the attitude converter and the encirclement and covering mechanism;

[0045] Figure 12 A first-person perspective diagram of the encirclement and containment organization;

[0046] Figure 13 for Figure 12 A partially enlarged structural diagram;

[0047] Figure 14 This is a second-person perspective diagram of the encirclement and containment mechanism;

[0048] Figure 15 for Figure 3 The enlarged structural diagram mainly reflects the structure of the movable sealing component, the fixed sealing component, and the swing sealing component;

[0049] Figure 16 Top view of the structure illustrating the working principle of the coating station Figure 1 ;

[0050] Figure 17 Top view of the structure illustrating the working principle of the coating station Figure 2 ;

[0051] Figure 18 Top view of the structure illustrating the working principle of the coating station Figure 3 ;

[0052] Figure 19 Top view of the structure illustrating the working principle of the coating station Figure 4 ;

[0053] Example 2 Attached Figure:

[0054] Figure 20 A schematic diagram illustrating the working principle of the top and bottom covering mechanism frame;

[0055] Figure 21 Schematic diagram of the structural principle of the combination of frame and combination fireworks Figure 1 ;

[0056] Figure 22 Schematic diagram of the structural principle of the combination of frame and combination fireworks Figure 2 . Detailed Implementation

[0057] Embodiment 1: refer to the attached Figures 1-2 , reflecting a specific structure of the present application. The skin device of the combined firework includes a step feeding mechanism 1, which drives the combined firework 2 to pass through the first glue applying mechanism 3, the top and bottom bag covering mechanism 4 in turn, and then enters the posture converter 5 to convert into an upright state, and then enters the surrounding bag covering mechanism 6, wherein,

[0058] refer to Figure 3 , the step feeding mechanism 1 includes a slide 101 supporting the combined firework 2 in a horizontal lying state, and a compression roller set 102 corresponding to the combined firework 2 is arranged above the slide 101; in the example, the compression roller set 102 is provided with a height adjusting assembly: by cooperation of the suspension screw rod 103 and the screw hole on the hanger 104, the height between the slide 101 and the compression roller set 102 is adjusted to adapt to combined fireworks of different specifications. The compression roller corresponding to the workstations of the first glue applying mechanism 3 and the top and bottom bag covering mechanism 6 is provided with a pressure adjusting bolt 105, which adjusts the pressing force of the compression roller through a V-shaped swing arm to facilitate positioning of the combined firework 2.

[0059] Please refer to Figure 4 , 5 , in the example, the starting workstation of the slide 101 is connected with the feeding workstation 106, and the feeding cylinder 114 pushes the combined firework 2 on the feeding workstation 106 to the starting workstation of the slide 101. The feeding workstation 106 is connected with a firework conveying belt (not shown in the figure).

[0060] The slide 101 is provided with three poking members 107 for driving the combined firework 2 to step forward along the slide 101, the poking members 107 are provided with telescopic cylinders 109, and the poking members 107 are connected with the step driver 108 composed of long-range cylinders; the poking members 107 step forward when they are extended upwards, and the poking members 107 reset to the starting point of the step when they are retracted downwards.

[0061] The three poking members 107 are installed on the base plate 110 through the telescopic cylinders 109, the base plate 110 is connected with the step driver 108, and the three poking members 107 are driven to step right once and reset left once between the workstations, and the cycle work pushes the combined fireworks 2 in each workstation to advance along the guide rail 111 step by step, and then enters the box body 501 from the starting workstation, the glue applying workstation and the top and bottom bag covering workstation of the slide 101 in turn. The telescopic cylinder 109 drives the lifting of the poking members 107, and when it rises, the poking members 107 are extended upwards higher than the slide 101, and when the poking members 107 step forward, they can poke the combined firework 2; when it descends, the poking members 107 are retracted downwards lower than the slide 101, and when the poking members 107 reset, they will not poke the combined firework 2.

[0062] The glue applying head 304 of the first glue applying mechanism 3 rotates around the glue applying part of the combined firework 2 in a horizontal lying state to complete the glue applying work.

[0063] Referring to Figures 6-9 In the example, the glue head 304 is connected to a glue storage container (not shown in the figure) and a pressure gas source (not shown in the figure) through pipes respectively. The pipes are provided with a rotating sleeve 301, which comprises an outer pipe 3103 and an inner pipe 3101 fixedly sleeved in the outer pipe. The two ends of the outer pipe 3103 are sealingly connected to the side wall of the inner pipe 3101, and the gap 3102 between the inner wall of the outer pipe 3103 and the outer wall of the inner pipe 3101 constitutes a first fluid channel. The inner cavity 3106 of the inner pipe 3101 constitutes a second fluid channel.

[0064] The side wall of the outer pipe 3103 is provided with an inlet 3104 of the first fluid channel and an outlet 3107. The outlet 3107 is connected to the glue head 304 through a first conduit 317. The inlet 3104 is connected to the pressure gas source through a first rotary sealing joint 302. The first rotary sealing joint 302 is sleeved on the side wall of the outer pipe 3103 through a first bearing 3201. The first rotary sealing joint 302 is provided with a gas-tight channel in the form of an annular space enclosed by a sealing ring 3202 at both ends. The pressure gas source is connected to the inlet 3104 through the interface 3203 of the first rotary sealing joint 302 and the gas-tight channel. Thus, the rotating first fluid channel is continuously supplied with pressure gas.

[0065] The inlet end 3105 of the inner pipe 3101 is connected to the glue storage container through a second rotary sealing joint 303, so that the rotating second fluid channel is continuously supplied with glue. The outlet end 3108 of the inner pipe 3101 is connected to the glue head 304 through a second conduit 318. The glue and the pressure gas are mixed in the inner cavity of the glue head 304 and sprayed onto the combined firework 2.

[0066] In the example, the rotating sleeve 301 is driven to rotate by a driving wheel 309 fixedly sleeved on the outer wall of the outer pipe 3103. The driving wheel 309 is driven to rotate by a motor 313 through a transmission shaft 312, a belt pulley 311 and a transmission belt 310 in sequence.

[0067] In the example, the glue head 304 is connected to the rotating sleeve 301 through a toggle arm 316, so that they rotate synchronously. The toggle arm 316 has a rotating radius adjusting assembly. In the example, the adjusting assembly is structured as follows: two connecting plates are connected through a waist-shaped groove and a bolt to adjust the connecting position, so as to shorten / lengthen the combined length of the two connecting plates. In order to adjust the rotating radius of the glue head 304 according to the specifications of the combined firework 2.

[0068] The rotating sleeve 301 is mounted on the lifting frame 308 by bearings for easy adjustment. The structure of the lifting frame 308 in the example is as follows: a base plate 319 is mounted on a lifting guide rod by a sliding block 315; the base plate 319 is also connected to a lifting screw (not shown in the figure), and the lifting screw is rotated by operating a hand wheel 314 to drive the base plate 319 to move up and down along the lifting guide rod. The rotating sleeve 301 is mounted on the base plate 319 by a second bearing 316, and the motor 313, transmission shaft 312, belt pulley 311, transmission belt 310, toggle arm 316, and glue applying head 304 connected to the rotating sleeve 301 are also connected to the base plate 319, and the whole body follows the base plate 319 to move up and down.

[0069] In the example, two groups of glue applying heads and their rotating sleeves and other components are arranged relative to the position of the combined firework 2. The glue applying work for the top and bottom banners is completed at the same time.

[0070] As shown in Figure 2 , 10 , the top and bottom banner covering mechanism 4 in the example includes two frame bodies located on the two side surfaces of the combined firework 2 in the horizontal lying state, and the frame bodies are composed of four rubber rollers 401 and four corner wheels 402 located around the combined firework 2. A cutter assembly 403 is arranged on the frame body. The long strip-shaped top or bottom banner is wound into a roll to form a top banner roll 404 or a bottom banner roll 405.

[0071] The unwinding assembly pulls the top or bottom banner through the combined firework 2 and the frame body; the two frame bodies move towards the bottom end or the top end of the combined firework 2 to complete the covering of the top and bottom banners at the same time; the cutter assembly 403 cuts the top and bottom banners when the two frame bodies move towards the combined firework 2; when the combined firework 2 enters the inner circle of the frame body, the rubber rollers 401 and corner wheels 402 of the frame body cover the cut banners onto the combined firework 2.

[0072] As shown in Figure 2 , 11 , the posture converter 5 includes a box body 501 loaded with the combined firework 2, the box body 501 has a feeding opening and a discharging opening, and the back plate 502 of the box body 501 is fixedly connected to a rotating shaft 503, which is pulled by a box cylinder 504 to realize 90-degree rotation in the forward and reverse directions, so as to switch between the feeding state and the discharging state: in the feeding state, the feeding opening of the box body 501 faces and connects with the chute 101, and the combined firework 2 in the horizontal lying state enters the box body 501 from the feeding opening; the box body 501 is rotated by 90 degrees to the discharging state, so that the combined firework 2 is converted to the vertical posture, and a pusher 505 composed of a cylinder pushes the combined firework 2 in the vertical posture into the connection station 507 from the discharging opening.

[0073] As shown in Figure 3 , 11-19, the enclosure conveying assembly of the enclosure covering mechanism 6 includes a tray 601, and the pre-cut enclosure 7 is stacked in the tray 601 for standby. A suction cup (not shown in the figure) is provided above the tray 601, and a suction cup mounting frame 602 is driven by a horizontal suction cup cylinder 603 to move forward and backward, and the suction cup mounting frame 602 is driven by a suction cup lifting cylinder 604 to lift, and the enclosure 7 in the tray 601 is sent to the conveying belt 607.

[0074] A second gluing mechanism is provided above the conveying belt 607: including a glue head mounting frame 605, the glue head mounting frame 605 is connected with a glue head cylinder 606 to move linearly along the conveying belt to reciprocate, and the enclosure 7 on the conveying belt 607 is glued; It also includes a glue container 608 for supplying glue to the glue head. The conveying belt 607 can be provided with a telescopic blocking piece. The enclosure is paused for gluing.

[0075] The enclosure conveying assembly and the second gluing mechanism are installed on a lifting support 610. The overall height can be adjusted according to the specifications of the combined fireworks.

[0076] The end of the conveying belt 607 is connected to the two negative pressure vertical plates 611 below through the paper passing gap 609 of the corner part and the covering station entrance 616; the covering station entrance 609 is located between the two negative pressure vertical plates 608; a plurality of paper protection lifting rods 613 are provided on the conveying belt 607 of the descending part, the paper protection lifting rods 613 extend to protect the enclosure when the enclosure descends, and the paper protection lifting rods 613 retract when the enclosure descends to position, so that the enclosure 7 descends more smoothly. The conveying belt 607 can also be provided with a plurality of enclosure pressing wheels 612.

[0077] A paper pressing piece 614 is provided on the working surface corresponding to each negative pressure vertical plate 611, one side of the paper pressing piece 614 is provided with a paper pressing roller 619, and a paper pressing cylinder 615 drives the paper pressing piece 614 to reciprocate linearly towards the negative pressure vertical plate 611; in the example, the paper pressing piece 614 on the right side is provided with a paper pressing translation cylinder 620 to drive the paper pressing piece 614 to reciprocate linearly along the working surface of the negative pressure vertical plate 611. The enclosure 7 adsorbed on the negative pressure vertical plate 611 is realized to realize the function of soothing and flattening.

[0078] The negative pressure vertical plate 611 is provided with a monitoring probe 618 and a corresponding monitoring hole 617, and the enclosure 7 blocks the monitoring hole 617 to generate a signal after being positioned.

[0079] In the example, the moving sealing member, the fixed sealing member and the swinging sealing member adopt rubber rollers with elastic working surfaces, and the roller bodies are provided with rotating shafts at both ends. The coating station includes a moving sealing roller 621 and a fixed sealing roller 622 located at both sides of the combined firework 2 respectively, and a swinging sealing roller 623 is arranged beside the fixed sealing roller 622. A cylinder-driven follow-up paper positioning member 636 is arranged behind the coating station. The moving direction of the follow-up paper positioning member 636 is opposite to that of the first surrounding material pushing device 631, and the follow-up paper positioning member 636 extends to the rear of the combined firework 2 at the entrance of the coating station, and is retracted synchronously with the first surrounding material pushing device 631 when the first surrounding material pushing device 631 pushes forward, so that the surrounding material does not become disordered during the movement.

[0080] The coating station entrance 616 is provided with first transition rollers 624 at both sides; the fixed sealing roller 622 and the swinging sealing roller 623 are located at one side of the entrance of a discharging channel 625, and the other side of the entrance of the discharging channel 625 is provided with second transition rollers 626 correspondingly. The working reliability and the coating effect are improved.

[0081] The rotating shafts 627 at both ends of the swinging sealing roller 623 are installed in swinging guide grooves 628, the rotating shafts 627 are hinged to the free ends of swinging arms 629, the roots of the swinging arms 629 are hinged to the rotating shafts of the fixed sealing roller 622, one end of the swinging arms 629 is connected to one end of a spring 630, and the other end of the spring 630 is connected to a rack. The swinging sealing roller 623 can swing around the fixed sealing roller 622, and the spring 630 can exert elastic pressure on the side surface of the combined firework 2, so that the surrounding material 7 is pressed and connected to the combined firework 2 by the adhesive when the combined firework 2 passes. The swinging sealing roller 623 can position the combined firework 2 and the surrounding material 7 before swinging.

[0082] The surrounding material 7 is transported to the vertical state by the conveying belt 607 and the negative pressure vertical plates 611 and the coating station entrance 616, the paper pressing member 614 moves towards the negative pressure vertical plates 611 and presses on the surrounding material 7; the first surrounding material pushing device 631 composed of a cylinder and a push-pull head directly pushes the combined firework 2 on the connecting station 507 to pass through the coating station entrance 616, and the combined firework 2 is positioned by the positioning cylinder 636 after entering the coating station.

[0083] When the combined firework 2 with the surrounding 7 enters the covering station, the paper pressing part 614 is reset to be out of contact with the surrounding 7, and the combined firework 2 pulls the surrounding 7 to cover the three sides of the combined firework 2; the moving roller air cylinder 632 drives the moving sealing roller 621 to move, and pushes the first end head 701 of the surrounding 7 to cover the fourth side of the combined firework 2; then the surrounding second material pusher 634 composed of the air cylinder pushes the combined firework 2 on the covering station horizontally to the discharge channel 625, and the fixed sealing roller 622 covers the second end head 702 of the surrounding 7 on the first end head 701 to complete the sealing. The discharge channel 625 is provided with a blocking strip 637 on both sides. The surrounding second material pusher 634 can be provided with an element for pressing the surrounding to prevent the surrounding on the combined firework 2 from being disordered during movement.

[0084] Thus, the leather wrapping of the top surrounding, the bottom surrounding and the surrounding of the combined firework 2 is completed.

[0085] Embodiment 2: refer to the attached Figures 20-22 The difference between the embodiment 1 and the embodiment 2 is that the frame structure of the top and bottom surrounding covering mechanism is different.

[0086] In the example, the frame is composed of four rotating rollers 803, the two ends of the rotating roller 803 have circular truncated cone shaped end portions 804 with gradually increasing diameters, and the adjacent two rotating roller circular truncated cone shaped end portions 804 are spliced to make the four corners of the inner circle of the frame circular, thereby corresponding to the circular corner portion 806 of the combined firework 801. In this example, the outer periphery of the circular truncated cone shaped end portion 804 is provided with a chamfered portion 805; the adjacent two rotating rollers 803 are spliced through the chamfered portion 805 to make the four corners of the inner circle of the frame circular.

[0087] As shown in the figure, in the working process of covering the surrounding paper 802, the glue is first applied on the four side walls of the combined firework 801; the surrounding paper 802 is located between the combined firework 801 and the frame, and under the pushing of the driving mechanism (not shown in the figure), the frame moves towards the surrounding paper 802 as shown by the arrow; in other embodiments, the combined firework can also move towards the surrounding paper 802; the combined firework side wall can also be placed on the conveying belt, and two frames are respectively located on both sides of the combined firework, and the two frames move towards the bottom end or the top end of the combined firework at the same time to complete the covering of the top surrounding and the bottom surrounding.

[0088] In this example, the frame moves towards the surrounding paper 802 until it is nested around the side wall of the combined firework 801; the surrounding paper 802 is wrapped on the top of the combined firework 801, and the surrounding paper 802 around the combined firework 801 is larger than the surrounding paper 802 around the combined firework 801, and is pasted on the side wall of the combined firework 801.

[0089] In the process of pressing the invitation paper 802 close to the side wall of the combined firework 801, the four roller bodies 803 rotate based on the friction with the invitation paper and the side wall of the firework. Since the overall angular velocity is the same when the roller bodies 803 rotate, but the linear velocity of the circular truncated cone-shaped end portion 804 increases with the increase of the diameter, the linear velocity of the two chamfer portions 805 at the joint is the largest, so the corner portion 806 of the corresponding invitation paper 802 is subjected to the largest frictional traction force, and the frictional traction force decreases to both sides from the joint as the center; therefore, the inner circle fillet formed by the circular truncated cone-shaped end portion 804 can pull the corresponding part of the invitation paper 802 to be evenly distributed in rotation, so that it forms fine wrinkles and is combined and pasted on the fillet portion 806 of the combined firework 801, avoiding the generation of larger wrinkles or protrusions, and effectively improving the wrapping effect on the fillet portion 806 of the combined firework 801.

[0090] The embodiments of the application disclosed above are only used to help explain the application. The embodiments do not describe all the details and do not limit the application to the specific embodiments described. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and combines the drawings to specifically describe these embodiments, in order to better explain the principles and practical applications of the application, so that those skilled in the art can well understand and utilize the application. However, the application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the scope of the application. Therefore, the application is limited only by the claims and their full scope and equivalents, and is not limited by the disclosed specific embodiments.

Claims

1. A backing device for combined fireworks, characterized in that, This includes a stepping feeding mechanism, which drives the combined fireworks sequentially through a first adhesive application mechanism and a top and bottom covering mechanism, then into a posture converter to be converted into an upright state, and finally into a surrounding covering mechanism. The stepping feeding mechanism includes a slide that supports the horizontally lying combination fireworks, with a pressure roller assembly for the combination fireworks positioned above the slide. The slide is equipped with a toggle mechanism that drives the combination fireworks forward along the slide. The toggle mechanism has a telescopic component and is connected to a stepping driver. When the toggle mechanism extends, it drives the combination fireworks forward; when it retracts, it returns to the starting point of the forward movement. The glue application head of the first glue application mechanism rotates around the glue application area of ​​the horizontally lying combination fireworks to complete the glue application. The top and bottom billboard covering mechanism includes two frames located on the sides of both ends of the horizontally lying combination fireworks, and also includes a top billboard roll and its unwinding and cutting components, and a bottom billboard roll and its unwinding and cutting components. The long strips of top or bottom billboards are rolled up to form the top / bottom. The unwinding assembly pulls the top / bottom flames between the combined fireworks and the frame; the two frames move towards the bottom or top of the combined fireworks respectively, simultaneously covering the top and bottom flames; as the two frames move towards the combined fireworks, the cutting assembly cuts off the top and bottom flames; the attitude converter includes a box for loading the combined fireworks, the box having an inlet and an outlet opening, the box being able to rotate 90 degrees forward and backward to switch between the inlet and outlet states; in the inlet state, the inlet opening of the box faces and connects to the slide, and the horizontally lying combined fireworks enter the box through the inlet opening; the box rotates 90 degrees to the outlet state, causing the combined fireworks to change to an upright posture, and the connecting pusher pushes the upright combined fireworks from the outlet opening into the connecting... The workstation includes a billboard conveying assembly and a negative pressure adsorption plate. The billboard conveying assembly includes a tray in which pre-cut billboards are stacked for later use. A lifting, movable suction cup delivers the billboards from the tray to a conveyor belt. A second gluing mechanism is located above the conveyor belt, and two negative pressure plates and the entrance to the wrapping workstation are connected at the lower end of the conveyor belt. The entrance to the wrapping workstation is located between the two negative pressure plates. A paper-pressing component is provided on the working surface of each negative pressure plate, and the paper-pressing component moves back and forth linearly towards the negative pressure plate. The wrapping workstation includes a movable sealing component and a fixed sealing component located on both sides of the combined fireworks. A swing sealing component is located next to the fixed sealing component. The conveyor belt delivers the billboards to the two negative pressure plates and the entrance to the wrapping workstation, where they are placed vertically and the paper is pressed. The component moves towards the negative pressure plate and presses against the enclosure; the first pusher of the enclosure pushes the combined fireworks on the connecting station straight through the entrance of the covering station and pushes the enclosure into the covering station, pulling the enclosure to cover the three sides of the combined fireworks; the moving sealing component moves and pushes the first end of the enclosure to cover the fourth side of the combined fireworks; when the second pusher of the enclosure pushes the combined fireworks on the covering station laterally to the discharge channel, the fixed sealing component and the swing sealing component cover the second end of the enclosure and overlap the first end to complete the sealing. The rotating shafts at both ends of the swing sealing component are installed in the swing guide groove. The rotating shaft is hinged to the free end of the swing arm. The root of the swing arm is hinged to the rotating shaft of the fixed sealing component. One end of the spring is connected to the middle of the swing arm, and the other end of the spring is connected to the frame.

2. The skin-covering device as described in claim 1, characterized in that, At least one paper pressing component is equipped with a translation drive component, which drives the paper pressing component to reciprocate linearly along the working surface of the negative pressure plate.

3. The skin-covering device as described in claim 1, characterized in that, Transition rollers are provided on both sides of the entrance to the coating station.

4. The skin-covering device as described in claim 1, characterized in that, The fixed sealing component and the swing sealing component are located on one side of the inlet of the discharge channel, and a transition roller is provided on the other side of the inlet of the discharge channel.

5. The skin-covering device as described in claim 1, characterized in that, Behind the coating station is a follower paper fixing component. The movement direction of the follower paper fixing component is opposite to that of the first pusher of the enclosure. The follower paper fixing component extends to the entrance of the coating station and presses against the back of the combined fireworks. When the first pusher of the enclosure pushes forward, the follower paper fixing component retracts synchronously.

6. The skin-covering device as claimed in claim 1, characterized in that, The pressure roller assembly is equipped with a height adjustment component; the pressure rollers corresponding to the workstations of the first adhesive application mechanism and the top and bottom coating mechanism are equipped with pressure adjustment components.

7. The skin-covering device as claimed in claim 1, characterized in that, The frame is composed of four rotating rollers, each with a frustum-shaped end with a gradually increasing diameter. The frustum-shaped ends of two adjacent rotating rollers are joined together to make the four corners of the inner ring of the frame rounded.

8. The skin-covering device as described in claim 7, characterized in that, The frustum-shaped end has a chamfered portion on its outer periphery; two adjacent rollers are joined together by the chamfered portion so that the four corners of the inner ring of the frame are rounded.

9. The skin-covering device as claimed in claim 1, characterized in that, The first adhesive applicator's applicator head is connected to a pressurized gas storage container and an adhesive storage container via pipes. A rotating sleeve is provided on the pipe, comprising an outer tube and an inner tube fixedly fitted inside the outer tube. The gap between the inner wall of the outer tube and the outer wall of the inner tube forms a pressurized gas channel, and the inner cavity of the inner tube forms an adhesive channel. The outer tube wall has an inlet and an outlet for the pressurized gas channel. The inlet is connected to the pressurized gas storage container via a first rotary sealing joint, and the outlet is connected to a rotating element. The inlet end of the inner tube is connected to the adhesive storage container via a second rotary sealing joint, and the outlet end of the inner tube is connected to the rotating element.

Images