CN111055537A

CN111055537A - Double-aluminum-clad tongue piece paperboard pre-folding device and method for cigarette packaging box

Info

Publication number: CN111055537A
Application number: CN202010036602.8A
Authority: CN
Inventors: 叶凯
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-01-14
Filing date: 2020-01-14
Publication date: 2020-04-24

Abstract

The invention provides a double-aluminum-coated tongue piece paperboard pre-folding device for a cigarette packaging box, which comprises a middle pre-folding mechanism, a conveying mechanism and a side pre-folding mechanism, wherein the middle pre-folding mechanism is arranged on the middle of the box; the middle pre-folding mechanism comprises a guide rail, a top plate, two pushing blocks and a power mechanism, wherein the top plate is arranged at the lower part of the guide rail, and the two pushing blocks are arranged at two sides of the top plate and are respectively connected with the lower part of the guide rail in a sliding manner; the power mechanism comprises a lifting unit and a translation unit, wherein the lifting unit is connected with the top plate, and the translation unit is connected with the push block. When the double-aluminum-coated tongue piece paperboard pre-folding device for the cigarette packaging box is used, when the pre-folded paperboard passes through the middle pre-folding mechanism, the lifting unit drives the top plate to ascend so as to jack the middle of the pre-folded paperboard to form a bend, then the translation unit pushes the two push blocks to move towards the top plate along the guide rail so as to fold the bend at the middle of the pre-folded paperboard, the paperboard is conveyed forwards continuously, and when two ends of the paperboard pass through the pre-folding channel, the two lugs at the side part of the paperboard are folded by the side push blocks and the side part of the conveying channel.

Description

Double-aluminum-clad tongue piece paperboard pre-folding device and method for cigarette packaging box

Technical Field

The invention belongs to the technical field of mechanical devices, and particularly relates to a double-aluminum-coated-tongue-piece paperboard pre-folding device and a pre-folding method for a cigarette packaging box.

Background

When the cigarette factory faced the production needs of novel two aluminium package tongue piece card papers, need according to the flow shown as description figure 1 with the middle part and the both sides auricle of new-type tongue piece card paper book in advance, the mechanism can not satisfy the production demand in advance of traditional single aluminium package cigarette, needs to design new-type two aluminium package tongue piece card papers and book device in advance and satisfy above-mentioned production demand.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a double aluminum-clad tab cardboard prefolding device for a cigarette pack.

In order to achieve the above purpose, the invention adopts the technical scheme that: a double-aluminum-clad tongue piece paperboard pre-folding device for a cigarette packaging box comprises a middle pre-folding mechanism, a conveying mechanism and a side pre-folding mechanism; wherein:

the middle pre-folding mechanism comprises a guide rail, a top plate, push blocks and a power mechanism, wherein the guide rail is horizontally arranged, the top plate is arranged at the lower part of the guide rail, the two push blocks are arranged at two sides of the top plate and are respectively connected with the lower part of the guide rail in a sliding manner, one surfaces of the two push blocks, which are close to the top plate, are provided with a plurality of rotating wheels which horizontally rotate, and the side wheel surfaces of the rotating wheels form side pressure surfaces; the power mechanism comprises a lifting unit and a translation unit, wherein the lifting unit is connected with the top plate, and the translation unit is connected with the push block;

the conveying mechanism comprises an upper annular belt, an upper belt wheel supporting the upper annular belt, a lower annular belt and a lower belt wheel supporting the lower annular belt, wherein the two groups of upper annular belts are respectively arranged around the two push blocks, and the lower end surfaces of the upper annular belts are matched with the lower end surfaces of the push blocks in height; the two groups of lower annular belts are respectively arranged at the lower parts of the two groups of upper annular belts, and the upper end surfaces of the lower annular belts and the lower end surfaces of the upper annular belts form conveying channels matched with the two ends of the pre-folded paperboard;

the side part pre-folding mechanism comprises two side pressing blocks which are respectively arranged at two sides of the output end of the conveying channel, and the side pressing blocks and the side part of the conveying channel form a pre-folding channel which is matched with positions to be folded at two ends of the pre-folding paperboard; the height of the upper end surface of the side pressure block is gradually increased from the position lower than the height of the conveying channel to the position higher than the height of the conveying channel along the conveying direction of the conveying channel.

The invention provides a double-aluminum-coated tongue piece paperboard prefolding device for a cigarette packaging box, which comprises the following steps of:

step 1, feeding the pre-folded paperboard through an input end of a conveying channel, and clamping two ends of the pre-folded paperboard by two groups of upper annular belts and lower annular belts and conveying the pre-folded paperboard forwards along the conveying channel;

step 2, when the paperboard passes through the middle pre-folding mechanism, the lifting unit drives the top plate to ascend so as to jack the middle of the pre-folded paperboard to form a bend, then the translation unit pushes the two pushing blocks to move towards the top plate along the guide rail, the rotating wheel rotates along with the movement of the paperboard after being abutted against the bend of the paperboard, and meanwhile, the bend of the middle of the paperboard is pressed to be completely folded;

and 3, continuously conveying the paperboard forwards, and folding the two lug plates at the side parts of the paperboard after the two lug plates at the side parts of the paperboard enter the pre-folding channel when the two ends of the paperboard pass through the pre-folding channel, so that the double-aluminum-coated tongue piece paperboard for the cigarette packaging box pre-folded at the middle part and the two sides is obtained.

In the invention, the rotating wheels are arranged on one surfaces of the two pushing blocks close to the top plate, when the pushing blocks approach to the paper jam, the rotating wheels rotate, the paper jam moves forwards against the side pressing surfaces, the paper jam is prevented from being clamped by the pushing blocks due to resistance to the paper jam, and the rotating wheels can be replaced by bearings, rotating rollers and the like.

Specifically, the power mechanism comprises a base, a top plate seat, a straight moving rod, a connecting rod, an eccentric shaft, an eccentric pin, an end face cam, a rocker and a motor, wherein a vertical through hole is formed in the middle of the base, vertical through grooves are formed in two ends of the base, the straight moving rod penetrates through the through hole in the base, the top plate seat is arranged at the top of the straight moving rod, and a top plate is vertically arranged in the middle of the top end of the top plate seat; the connecting rod is connected with the bottom pin of the straight moving rod; the two eccentric shafts are horizontally arranged on two sides of the connecting rod through the supporting seat, one ends of the eccentric shafts close to the connecting rod are respectively provided with eccentric holes corresponding to the positions, the middle parts of the eccentric pins are in clearance fit with the connecting rod, and two ends of the eccentric pins are respectively inserted into the eccentric holes of the two eccentric shafts; the two end cams are respectively and coaxially fixedly connected to the two eccentric shafts, and the cams of the two end cams are far away from each other; the two rocking rods are respectively in pin connection with the two through grooves on the base, the top ends of the two rocking rods are respectively in pin connection with one ends of the two pushing blocks, which are far away from the top plate, and the bottom ends of the two rocking rods are respectively in transmission connection with the cam surfaces of the two end face cams; the output end of the motor is in transmission connection with the eccentric shaft; the eccentric shaft, the top plate seat, the straight moving rod, the connecting rod and the eccentric pin form a lifting unit, and the eccentric shaft, the end face cam and the rocker form a translation unit; when the motor rotates, the eccentric shaft is driven to rotate, the rotating force of the eccentric shaft is converted into a top plate seat by the straight moving rod, the connecting rod and the eccentric pin to drive the top plate to lift, the eccentric shaft drives the end face cam to rotate, and the cam surface drives the rocker to swing by taking the pin joint of the rocker and the base as a fulcrum, so that the push block is driven to horizontally move along the guide rail.

Optimized, the lowest of the cam surface of two end face cams corresponds with the eccentric hole position of eccentric shaft, like this, when the eccentric shaft rotates to the high highest of eccentric hole, the roof is in the peak of jack-up, the lowest of the cam surface of end face cam is connected with the rocker bottom, then the ejector pad is in and keeps away from roof department, along with the rotation of eccentric shaft, the eccentric hole rotates to the lowest, drive the roof decline, the end face cam drives the rocker bottom outwards when rotating to the highest of cam surface, thereby it pushes away the ejector pad and removes in order to deepen the crease to bend the department top tightly in the middle part of card paper to drive the ejector pad.

Specifically, middle part prefolding mechanism still includes the locating lever, set up the locating hole that the opening is relative between roof seat and the base respectively, the one end of locating lever is inserted and is located on the locating hole of base, and in the locating hole of roof seat was worn to locate by the other end, when roof seat vertical lift, the locating lever avoided the roof to rotate, stabilizes the roof simultaneously.

The middle pre-folding mechanism comprises a base, wherein two ends of a guide rail of the middle pre-folding mechanism are fixed on the tops of two end walls of the base; one ends of two eccentric shafts of the power mechanism, which are far away from the connecting rod, penetrate through the end wall of the base, and a supporting seat of the eccentric shafts is fixed at the bottom in the base; two groups of upper belt wheels corresponding to two groups of upper annular belts of the conveying mechanism are respectively and coaxially connected through a belt wheel shaft, two groups of lower belt wheels corresponding to two groups of lower annular belts are respectively and coaxially connected through a belt wheel shaft, and two ends of the belt wheel shaft penetrate through two end walls of the base; driven gears are respectively arranged at the positions where the eccentric shaft and the belt wheel shaft penetrate through the end wall of the machine base, an input gear is arranged at the output end of the motor, and the input gear teeth are in direct or indirect transmission connection with the driven gears.

Specifically, a cam roller is arranged at the bottom end of the rocker, the cam roller is abutted against the cam surface of the end face cam, a blind hole with an outward opening is formed in the position, located between the cam roller and the base, of the rocker, a reset spring is arranged in the blind hole, and one end, exceeding the blind hole, of the reset spring is connected with the side wall of the base; the eccentric shaft drives the end face cam to rotate, the end face cam pushes the cam roller outwards when rotating to the position where the high face corresponds to the cam roller, and meanwhile, the reset spring is extruded, the pin joint of the rocker and the base serves as a fulcrum, the top of the rocker drives the push block to be close to the top plate along the guide rail so as to press the bending position of the middle part of the paperboard to the doubling position, when the end face cam rotates to the position where the low face corresponds to the cam roller, the reset spring extrudes the bottom of the rocker, so that the cam roller of the push block is kept in butt joint with the end face cam, and meanwhile, the push block is driven to be far away from the top plate.

Specifically, the frame lateral wall sets up the screw that corresponds with the blind hole position, sets up the spring adjusting collar in the screw, and reset spring surpasss the one end of blind hole and locates in the screw of frame lateral wall and with the adaptation of spring adjusting collar, rotates the spring adjusting collar in order to adjust spring's decrement.

Specifically, the supporting seat comprises bearing seats and bearings arranged in the bearing seats, the two bearing seats are fixedly arranged at the bottom in the base, the two eccentric shafts are respectively matched with the bearings in the two bearing seats to be horizontally arranged on two sides of the connecting rod, and the eccentric shafts can horizontally rotate under the support of the bearings.

Specifically, the conveying mechanism further comprises roller shafts and rollers which are arranged at the input end of the conveying channel, the two roller shafts are sequentially arranged from top to bottom, the four rollers are respectively installed on the two roller shafts in pairs, and a crack adaptive to the pre-folded paperboard is formed between the two groups of rollers which are opposite to each other on the two roller shafts; the end of the roll shaft penetrates through the end wall of the machine base and is coaxially connected with a roll shaft gear, and the roll shaft gear is meshed with the adjacent driven gear; the roller pre-conveys the pre-folded card paper, so that the pre-folded card paper can enter the conveying channel more conveniently; the channel sets up card paper cutting device before the card paper is folded in advance, and cutting device sends into the card paper cutting back at a slow speed, and the roller sends into the transfer passage after accelerating card paper, and the roller has the transfer and accelerates the function.

Specifically, the base is further provided with a cover plate, and the cover plate is provided with a handle.

The utility model discloses a card paper, including the card paper, conveying channel input front end department sets up preceding protecting strip, and conveying channel middle part both sides set up middle protecting strip, and conveying channel output both sides set up back protecting strip, the up end and the conveying channel high adaptation of preceding protecting strip, middle protecting strip, back protecting strip, wherein, back protecting strip extends to being close to roof department by the conveying channel output, and the card paper of book passes through the support of preceding protecting strip, middle protecting strip, back protecting strip in proper order behind the access device in advance.

Specifically, the two side pressing blocks of the side pre-folding mechanism are respectively installed on the rear protective strips on the two sides of the output end.

The invention has the beneficial effects that:

according to the pre-folding device and the pre-folding method for the double-aluminum-coated tongue piece paperboard for the cigarette packing box, the middle part of the paperboard is folded in half through the middle pre-folding mechanism, and the lugs on the two sides of the paperboard are folded through the side pre-folding mechanism.

Drawings

Fig. 1 is a pre-folding flow chart of a novel double-aluminum-clad tongue piece paperboard;

FIG. 2 is a general view of a double aluminum-clad tongue piece cardboard prefolding device in an embodiment;

FIG. 3 is a schematic view of the cover plate removed;

FIG. 4 is a top view with the cover plate removed;

FIG. 5 is a top view of the conveyor mechanism removed;

FIG. 6 is a schematic view of a middle pre-folding mechanism;

fig. 7 is an enlarged view of a portion a of fig. 6.

The device comprises a base 1, a cover plate 2, a handle 3, a guide rail 4, a top plate 5, a push block 6, a rotating wheel 6a, a positioning rod 7, a base 8, a top plate seat 9, a straight moving rod 10, a connecting rod 11, an eccentric shaft 12, an eccentric pin 13, an end cam 14, a rocker 15, a cam roller 15, a return spring 16, a spring adjusting sleeve 17, an input gear 18, an upper annular belt 19, an upper belt wheel 20, a lower annular belt wheel 21, a lower belt wheel 22, a roller shaft 23, a roller 24, a front guard strip 25, a middle guard strip 26, a rear guard strip 27 and a lateral pressure block 28.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Examples

As shown in fig. 2 to 7, the present embodiment provides a double aluminum-clad tongue piece cardboard pre-folding device for a cigarette packaging box, which includes a machine base 1, a middle pre-folding mechanism, a conveying mechanism, and a side pre-folding mechanism; wherein:

a cover plate 2 is arranged on the machine base 1, and a handle 3 is arranged on the cover plate 2;

the middle pre-folding mechanism comprises a guide rail 4, a top plate 5, push blocks 6, a positioning rod 7 and a power mechanism, wherein two ends of the guide rail 4 are horizontally fixed at the tops of two end walls of the base 1, the top plate 5 is arranged at the lower part of the guide rail 4, the two push blocks 6 are arranged at two sides of the top plate 5 and are respectively connected with the lower part of the guide rail 4 in a sliding manner, one surface of each push block 6, which is close to the top plate 5, is provided with a plurality of rotating wheels 6a which rotate horizontally, and the side wheel surfaces; the power mechanism comprises a base 8, a top plate seat 9, a straight moving rod 10, a connecting rod 11, an eccentric shaft 12, an eccentric pin 13, an end face cam 14, a rocker 15 and a motor, wherein a vertical through hole is formed in the middle of the base 8, vertical through grooves are formed in two ends of the base 8, the straight moving rod 10 penetrates through a sleeve type straight line ball bearing and is arranged in the through hole in the base 8, the top plate seat 9 is arranged at the top of the straight moving rod 10, a top plate 5 is vertically arranged in the middle of the top end of the top plate seat 9, positioning holes with opposite openings are respectively formed between the top plate seat 9 and the base 8, one end of a positioning rod 7 is inserted into the positioning hole in the base 8, and; the connecting rod 11 is in pin connection with the bottom of the linear motion rod 10; two eccentric shafts 12 are horizontally arranged on two sides of a connecting rod 11 through a supporting seat, one ends of the two eccentric shafts 12 close to the connecting rod 11 are respectively provided with eccentric holes corresponding to the positions, the middle parts of eccentric pins 13 are in clearance fit with the connecting rod 11, two ends of the eccentric pins are respectively inserted into the eccentric holes of the two eccentric shafts 12, and one ends of the eccentric shafts 12 far away from the connecting rod 11 penetrate through the end wall of the base 1 and are provided with coaxial driven gears; the supporting seat of the eccentric shaft 12 comprises bearing seats and bearings arranged in the bearing seats, the two bearing seats are fixedly arranged at the bottom in the base 1, and the two eccentric shafts 12 are respectively matched with the bearings in the two bearing seats to be horizontally arranged at the two sides of the connecting rod 11; the two end cams 14 are respectively and coaxially fixedly connected to the two eccentric shafts 12, the cam surfaces of the two end cams 14 are far away from each other, and the lowest positions of the cam surfaces of the two end cams 14 correspond to the positions of the eccentric holes of the eccentric shafts 12; two rocking bars 15 are respectively in pin connection with two through grooves on the base 8, the top ends of the two rocking bars 15 are respectively in pin connection with one ends, far away from the top plate 5, of the two push blocks 6, a cam roller 15a is arranged at the bottom end of each rocking bar 15, the cam roller 15a is abutted to the cam surface of the end face cam 14, a blind hole with an outward opening is formed in the position, located between the cam roller 15a and the base 8, of each rocking bar 15, a reset spring 16 is arranged in each blind hole, the side wall of the base 1 is provided with a screw hole corresponding to the position of the blind hole, a spring adjusting sleeve 17 is arranged in each screw hole, and one end, exceeding the blind hole; the motor is arranged outside the base 1, an input gear 18 is arranged at the output end of the motor, and the input gear teeth are in direct or indirect transmission connection with the driven gear; wherein, the eccentric shaft 12, the top plate seat 9, the direct-acting rod 10, the connecting rod 11 and the eccentric pin 13 form a lifting unit, and the eccentric shaft 12, the end cam 14 and the rocker 15 form a translation unit;

the conveying mechanism comprises an upper annular belt 19, an upper belt wheel 20 supporting the upper annular belt 19, a lower annular belt 21, a lower belt wheel 22 supporting the lower annular belt 21, a roller shaft 23 and a roller 24; wherein, two groups of upper annular belts 19 are respectively arranged around the two push blocks 6, and the lower end surfaces of the upper annular belts 19 are matched with the lower end surfaces of the push blocks 6 in height; the two groups of lower annular belts 21 are respectively arranged at the lower parts of the two groups of upper annular belts, the upper end surfaces of the lower annular belts 21 and the lower end surfaces of the upper annular belts 19 form a conveying channel matched with the two ends of the pre-folded paperboard, the front end of the input end of the conveying channel is provided with a front guard strip 25, the two sides of the middle part of the conveying channel are provided with middle guard strips 26, the two sides of the output end of the conveying channel are provided with rear guard strips 27, the upper end surfaces of the front guard strips 25, the middle guard strips 26 and the rear guard strips 27 are matched with the height of the conveying channel, and the rear guard strips 27 extend from the output end of the conveying channel to; wherein, two groups of upper belt pulleys 20 corresponding to the two groups of upper endless belts 19 are respectively and coaxially connected through a belt pulley shaft, two groups of lower belt pulleys 22 corresponding to the two groups of lower endless belts 21 are respectively and coaxially connected through a belt pulley shaft, two ends of the belt pulley shaft penetrate through two end walls of the machine base 1 and are provided with driven gears, and the driven gears are indirectly in transmission connection with an input gear 18 arranged at the output end of the motor; the roll shafts 23 and the roll shafts 24 are arranged at the input end of the conveying channel, the two roll shafts 23 are sequentially arranged from top to bottom, the four roll shafts 24 are respectively installed on the two roll shafts 23 in pairs, and a crack adaptive to the pre-folded paperboard is formed between the two groups of roll shafts 24 opposite to each other on the two roll shafts 23; wherein, the end of the roll shaft 23 passes through the end wall of the machine base 1 and is coaxially connected with the roll shaft 23 through a gear, and the roll shaft 23 is meshed with the adjacent driven gear;

the side part pre-folding mechanism comprises two side pressing blocks 28 which are respectively arranged at two sides of the output end of the conveying channel, the two side pressing blocks 28 are respectively arranged on the rear protective strips 27 at two sides of the output end, and the side pressing blocks 28 and the side part of the conveying channel form a pre-folding channel which is matched with positions to be folded at two ends of the pre-folding paperboard; the height of the upper end face of the side pressing block 28 is increased from a position lower than the height of the conveying channel to a position higher than the height of the conveying channel along the conveying direction of the conveying channel.

step 1, starting a motor to drive the whole device to inspire, conveying pre-folded paperboard to a front support plate, clamping two ends of the pre-folded paperboard conveyed out of a cutting device by four rollers 24 and conveying the pre-folded paperboard to an input end of a conveying channel, and clamping two ends of the pre-folded paperboard by two groups of upper annular belts 19 and lower annular belts 21 and conveying the pre-folded paperboard forwards along the conveying channel;

step 2, when the paperboard passes through the middle pre-folding mechanism, the eccentric shaft 12 drives the top plate 5 to be lengthened to jack the middle part of the paperboard to form a middle bending part, when the eccentric shaft 12 rotates to the highest position of the height of the eccentric hole, the top plate 5 is at the highest point of jacking, at the moment, the lowest position of the cam surface of the end surface cam 14 is connected with the bottom of the rocker 15, and the push block 6 is far away from the top plate 5;

step 3, along with the rotation of the eccentric shaft 12, the eccentric hole rotates to the lowest position to drive the top plate 5 to descend, the end face cam 14 rotates to the highest position of the cam surface and simultaneously drives the bottom end of the rocker 15 to move outwards, so that the pushing block 6 is driven to move towards the top plate 5 to deepen the folding mark at the middle bending position of the paperboard, and the rotating wheel 6a is abutted against the middle bending position of the paperboard and rotates along with the advancing of the paperboard;

step 4, the card paper after the middle part fifty percent discount continues to convey forward, and when the card paper both ends passed through the passageway of prefolding, the card paper middle part was located the conveying passageway, and the card paper lateral part was located side briquetting 28 up end, along with the going on of conveying, the auricle of card paper both sides was by the up end jack-up of side briquetting 28 and upwards upset in order to get into the passageway of prefolding, and after the card paper passed through the passageway of prefolding, two auricles of card paper were rolled up to accomplish the prefolding of card paper.

The device and the method for pre-folding the double-aluminum-coated tongue piece paperboard for the cigarette packaging box provided by the embodiment are suitable for pre-folding a novel double-aluminum-coated tongue piece paperboard by driving the whole device to convey the paperboard, folding the middle part of the paperboard and folding the lug piece of the paperboard through one motor.

The above examples of the present invention are merely illustrative of the present invention and are not intended to limit the embodiments of the present invention. Variations and modifications in other variations will occur to those skilled in the art upon reading the foregoing description. Not all embodiments are exhaustive. All obvious changes and modifications of the present invention are within the scope of the present invention.

Claims

1. A double-aluminum-clad tongue piece paperboard pre-folding device for a cigarette packaging box is characterized by comprising a middle pre-folding mechanism, a conveying mechanism and a side pre-folding mechanism; wherein:

2. The double-aluminum-clad tongue piece paperboard prefolding device for the cigarette packaging box according to claim 1, wherein the power mechanism comprises a base, a top plate seat, a straight moving rod, a connecting rod, an eccentric shaft, an eccentric pin, an end face cam, a rocker and a motor, wherein a vertical through hole is formed in the middle of the base, vertical through grooves are formed in two ends of the base, the straight moving rod is arranged in the through hole in the base in a penetrating manner, the top plate seat is arranged at the top of the straight moving rod, and a top plate is vertically arranged in the middle of the top end of the top plate seat; the connecting rod is connected with the bottom pin of the straight moving rod; the two eccentric shafts are horizontally arranged on two sides of the connecting rod through the supporting seat, one ends of the eccentric shafts close to the connecting rod are respectively provided with eccentric holes corresponding to the positions, the middle parts of the eccentric pins are in clearance fit with the connecting rod, and two ends of the eccentric pins are respectively inserted into the eccentric holes of the two eccentric shafts; the two end cams are respectively and coaxially fixedly connected to the two eccentric shafts, and the cams of the two end cams are far away from each other; the two rocking rods are respectively in pin connection with the two through grooves on the base, the top ends of the two rocking rods are respectively in pin connection with one ends of the two pushing blocks, which are far away from the top plate, and the bottom ends of the two rocking rods are respectively in transmission connection with the cam surfaces of the two end face cams; the output end of the motor is in transmission connection with the eccentric shaft; the eccentric shaft, the top plate seat, the straight moving rod, the connecting rod and the eccentric pin form a lifting unit, and the eccentric shaft, the end face cam and the rocker form a translation unit.

3. The double aluminum-clad tongue piece paperboard prefolding device for the cigarette packaging box according to claim 2, wherein the middle prefolding mechanism further comprises a positioning rod, positioning holes with opposite openings are respectively arranged between the top plate seat and the base, one end of the positioning rod is inserted into the positioning hole of the base, and the other end of the positioning rod is inserted into the positioning hole of the top plate seat.

4. The double aluminum-clad tongue piece paperboard prefolding device for the cigarette packaging box according to claim 2 or 3, further comprising a base, wherein two ends of the guide rail of the middle prefolding mechanism are fixed on the tops of two end walls of the base; one ends of two eccentric shafts of the power mechanism, which are far away from the connecting rod, penetrate through the end wall of the base, and a supporting seat of the eccentric shafts is fixed at the bottom in the base; two groups of upper belt wheels corresponding to two groups of upper annular belts of the conveying mechanism are respectively and coaxially connected through a belt wheel shaft, two groups of lower belt wheels corresponding to two groups of lower annular belts are respectively and coaxially connected through a belt wheel shaft, and two ends of the belt wheel shaft penetrate through two end walls of the base; driven gears are respectively arranged at the positions where the eccentric shaft and the belt wheel shaft penetrate through the end wall of the machine base, an input gear is arranged at the output end of the motor, and the input gear teeth are in direct or indirect transmission connection with the driven gears.

5. The double aluminum-clad tongue piece paperboard prefolding device for the cigarette packaging box according to claim 4, wherein a cam roller is arranged at the bottom end of the rocker, the cam roller abuts against the cam surface of the end cam, a blind hole with an outward opening is arranged between the cam roller and the base of the rocker, a return spring is arranged in the blind hole, and one end of the return spring, which exceeds the blind hole, is connected with the side wall of the base.

6. The double aluminum-clad tongue piece cardboard prefolding device for cigarette packaging boxes according to claim 4, wherein the supporting seat comprises a bearing seat and a bearing installed in the bearing seat, two bearing seats are fixedly arranged at the bottom in the machine base, and the two eccentric shafts are respectively matched with the bearings in the two bearing seats to be horizontally installed at both sides of the connecting rod.

7. The device for pre-folding the double aluminum-clad tongue piece paperboard for the cigarette packaging box according to claim 4, wherein the conveying mechanism further comprises a roller shaft and a roller which are arranged at the input end of the conveying channel, the two roller shafts are sequentially arranged from top to bottom, four rollers are respectively installed on the two roller shafts in pairs, and a gap matched with the pre-folded paperboard is formed between two groups of rollers which are opposite to each other on the two roller shafts; and the end of the roll shaft penetrates through the end wall of the machine base and is coaxially connected with a roll shaft gear, and the roll shaft gear is meshed with the adjacent driven gear.

8. The double aluminum-clad tongue piece paperboard prefolding device for cigarette packaging boxes according to claim 1 or 2, wherein a front protective strip is arranged at the front end of the input end of the conveying channel, a middle protective strip is arranged at two sides of the middle part of the conveying channel, a rear protective strip is arranged at two sides of the output end of the conveying channel, the upper end surfaces of the front protective strip, the middle protective strip and the rear protective strip are matched with the height of the conveying channel, and the rear protective strip extends from the output end of the conveying channel to a position close to the top plate.

9. The device of claim 8, wherein the two side pressing blocks of the side pre-folding mechanism are respectively mounted on the rear guard bars at two sides of the output end.

10. A method of prefolding a cigarette pack in accordance with any one of claims 1 to 9 using a double aluminium-clad tab cardboard prefolding apparatus, comprising the steps of: