CN113879619A - Automatic unpacking equipment for tongue buckle carton - Google Patents

Abstract

The invention discloses automatic carton opening equipment for a tongue-buckle carton, which comprises a rack, a feeding unit, a taking unit, a carton expanding unit, a folding unit, a bottom pressing unit and a tongue buckle limiting unit, wherein the feeding unit is arranged on the rack; the feeding unit is used for placing box blanks and continuously feeding the box blanks, the taking unit is used for grabbing the box blanks and driving the box blanks to move and sequentially pass through the box expanding unit and the lug folding unit and then reach the upper part of the bottom pressing unit, the box expanding unit is used for enabling four side walls of the box blanks to be deformed into a rectangular body, the lug folding unit is used for folding two bottom side lugs into a box, the bottom pressing unit is used for bending the bottom cover and pressing a tongue buckle into the box body, and the tongue buckle limiting unit is used for assisting the tongue buckle to keep the posture of entering the box; the box blank is sucked from the feeding unit through the material taking unit and is driven to the bottom pressing unit, and in the process that the box blank is driven by the material taking unit, the box blank sequentially passes through the box expanding unit for box expansion and the bottom side ear folding unit for bottom end folding, and then the bottom pressing unit and the tongue buckle limiting unit are used for bottom cover folding and tongue buckle folding. It has the following advantages: and the box is opened fully automatically, so that cost is reduced and efficiency is improved.

Description

Automatic unpacking equipment for tongue buckle carton

Technical Field

The invention relates to packaging mechanical equipment, in particular to automatic opening equipment for a tongue-buckle carton.

Background

In the packaging machinery industry, the use of the carton is very common, and the carton is often in the form of a box blank with a compressed space in the storage and transportation process, but when the carton needs to be used for packaging, the carton blank needs to be unpacked and expanded. In the prior art, manual unpacking is often performed manually, so that the manual unpacking efficiency is low in the face of a large number of unpacking tasks, and the production efficiency of a factory is influenced.

Disclosure of Invention

The invention provides automatic carton opening equipment for a tongue-buckle carton, which overcomes the defects of the prior art in the background art.

The technical scheme adopted by the invention for solving the technical problems is as follows:

an automatic carton opening device for a tongue-buckle carton is disclosed, wherein the carton is a hexahedral carton and comprises a bottom cover, tongue buckles integrally extending from one side edge of the bottom cover, bottom side lugs positioned at two opposite sides of the bottom cover, and four side walls connecting the bottom cover and the two bottom side lugs; the equipment comprises a rack, and a feeding unit, a taking unit, an expansion unit, a lug folding unit, a bottom pressing unit and a tongue buckle limiting unit which are arranged on the rack; the feeding unit is used for placing carton blanks when the cartons are not opened and can continuously feed, the taking unit is used for grabbing the carton blanks and can drive the carton blanks to pass through the box expanding unit and the lug folding unit in sequence along linear motion and then reach the upper part of the bottom pressing unit, the box expanding unit is used for pushing the carton side walls on the carton blanks in the box blank motion process to enable the four side walls of the carton blanks to be deformed into a rectangular body, the lug folding unit is used for folding two bottom side lugs on the carton blanks after the rectangular body is formed into a box, the bottom pressing unit is used for bending the bottom cover and pressing the tongue buckle into the box body, the tongue buckle limiting unit is used for assisting the tongue buckle to keep a box-entering posture, and the distance between the bottom pressing unit and the lug folding unit is smaller than the width of the bottom cover along the box blank motion direction; the box blank is sucked from the feeding unit through the material taking unit and is driven to the bottom pressing unit, and in the process that the box blank is driven by the material taking unit, the box blank sequentially passes through the box expanding unit for box expansion and the bottom side ear folding unit for bottom end folding, and then the bottom pressing unit and the tongue buckle limiting unit are used for bottom cover folding and tongue buckle folding.

In one embodiment: the box body sending-out unit is used for sending the box body after the box is opened out of the equipment.

In one embodiment: this feed unit is including establishing the bottom plate in the frame and with this bottom plate sliding connection's sliding plate, and this bottom plate orientation is got the material unit direction and is set up from high to low slope, and the parallel gravity direction of face of this sliding plate slides from high to low along the bottom plate under the effect of gravity, and the nearly low end department of this bottom plate is equipped with spacing separation blade, and the case blank is upright state and arranges in between this sliding plate and spacing separation blade.

In one embodiment: the material taking unit comprises a first driving cylinder, a sliding frame, a guide rail and a sucker mechanism, wherein the guide rail and the first driving cylinder are horizontally arranged on a rack, the sliding frame is connected with the guide rail in a sliding manner and fixedly connected with a moving part of the first driving cylinder, a sucker of the sucker mechanism is arranged on the sliding frame, a disc opening of the sucker faces towards the feeding unit, and the sliding frame is driven by the first driving cylinder to move along the guide rail so as to drive the sucker to move.

In one embodiment: the box expanding unit is a flat plate which is horizontally arranged on the rack and is provided with a rounded arc angle which can generate propping action on the side wall of the box body of the box blank when the box blank passes through so as to expand the box.

In one embodiment: the ear folding unit comprises two second driving cylinders, the moving part of each second driving cylinder is fixedly connected with a piece, the two second driving cylinders are arranged oppositely, and the cylinder bodies of the second driving cylinders are obliquely arranged to enable the moving parts to move obliquely upwards relatively so as to fold two bottom side ears of the box body respectively.

In one embodiment: the bottom pressing unit comprises a third driving cylinder and a fourth driving cylinder, the third driving cylinder is arranged in an up-down mode, the fourth driving cylinder is arranged in an up-down mode, a moving part of the third driving cylinder is fixedly connected with a horizontally arranged bottom pressing plate, a moving part of the fourth driving cylinder is fixedly connected with a horizontally arranged folding tongue buckling plate, the folding tongue buckling plate and the bottom pressing plate are arranged in parallel side by side, and a bottom cover of the box blank is driven by the material taking unit to firstly pass through the folding tongue buckling plate and then reach the bottom pressing plate; the tongue buckle limiting unit comprises a fifth driving cylinder capable of driving horizontal movement and a horizontally arranged limiting rod, the moving part of the fifth driving cylinder is fixedly connected with one end of the limiting rod, the limiting rod is positioned between the pressing bottom plate and the folded tongue buckle plate and is parallel to the pressing bottom plate and the folded tongue buckle plate, and the heights of the pressing bottom plate, the folded tongue buckle plate and the limiting rod when the third driving cylinder and the fourth driving cylinder do not act are equal.

In one embodiment: the tongue-folding plate comprises a first plate and a second plate which are fixedly connected, wherein the second plate is positioned between the bottom pressing plate and the first plate, and at least part of the second plate protrudes above the first plate.

In one embodiment: the tongue buckle limiting unit also comprises a limiting plate which is arranged at the opposite side of the travel of the limiting rod and is used for limiting the travel distance of the limiting rod.

In one embodiment: the bottom pressing unit also comprises a sixth driving cylinder capable of driving horizontal movement, and a moving part of the sixth driving cylinder is connected with the third driving cylinder and the fourth driving cylinder.

In one embodiment: the box body sending-out unit comprises a seventh driving cylinder and a push plate, wherein the seventh driving cylinder can drive the seventh driving cylinder to move horizontally, the moving part of the seventh driving cylinder is fixedly connected with the push plate, and the moving direction of the moving part of the seventh driving cylinder is vertical to the moving direction of the moving part of the sixth driving cylinder.

In one embodiment: the front end of the stroke of the bottom pressing unit is provided with a baffle plate at intervals for limiting the moving stroke distance of the box blank.

Compared with the background technology, the technical scheme has the following advantages:

through the present case automatic unpacking equipment, realize the automatic unpacking of case base, need not artifical unpacking, save the labour greatly, save labour cost, whole unpacking process is full-automatic simultaneously, improves the degree of automation of production greatly, improves production efficiency, for the enterprise increase cost reduction.

Drawings

The invention is further illustrated by the following figures and examples.

Fig. 1 is a schematic perspective view of an automatic carton opening apparatus for a tongue-and-groove carton.

Fig. 2 is a second perspective view of an automatic carton opening apparatus for a tongue-and-groove carton.

Fig. 3 is a schematic view of the structure of the box blank.

Fig. 4 is a schematic view of the structure of the supply unit.

Fig. 5 is a schematic view of a material extracting unit.

Fig. 6 is a schematic structural view of the ear folding unit.

Fig. 7 is a schematic structural view of the bottom pressing unit.

Fig. 8 is a schematic structural view of a tongue buckle limiting unit.

Fig. 9 is a schematic structural view of the box body sending-out unit.

Detailed Description

An automatic carton opening device for a tongue-buckle carton is a hexahedral carton and comprises a bottom cover 101, a tongue buckle 102 integrally extending from one side edge of the bottom cover 101, bottom side lugs 103 positioned on two opposite sides of the bottom cover 101, and four side walls 104 connecting the bottom cover 101 and the two bottom side lugs 103, and generally comprises an upper cover, a tongue buckle integrally extending from one side edge of the upper cover and upper side lugs positioned on two opposite sides of the upper cover, wherein the carton opening device only operates the bottom cover 101 of the carton 100, the tongue buckle 102 extending from the bottom cover 101, the bottom side lugs 103 and the side walls 104.

Referring to fig. 1, 2 and 3, the apparatus includes a frame 1, and a feeding unit 10, a material taking unit 20, a box expanding unit 30, a lug folding unit 40, a bottom pressing unit 50, and a tongue-and-groove limiting unit 60 mounted on the frame 1; the feeding unit 10 is used for placing box blanks 100 which are not unpacked and continuously feeding the box blanks, the fetching unit 20 is used for grabbing the box blanks 100 and driving the box blanks 100 to pass through the box expanding unit 30 and the lug folding unit 40 in sequence along a linear motion to be located above the bottom pressing unit 50, the box expanding unit 30 is used for pushing the side walls 104 of the box blanks 100 on the box blanks to enable the four side walls 104 of the box blanks 100 to be deformed into a rectangular body in the moving process of the box blanks 100, the lug folding unit 40 is used for folding the two bottom side lugs 103 of the box blanks 100 after the rectangular body is formed into half boxes, the bottom pressing unit 50 is used for bending the bottom cover 101 and pressing the tongue buckles 102 into the box body, and the tongue buckle limiting unit 60 is used for assisting the tongue buckles 102 to keep in the box entering posture; the distance between the bottom pressing unit 50 and the ear folding unit 40 is smaller than the width of the bottom cover 101 along the moving direction of the box blank 100, so as to ensure that when the box blank 100 is bent by the bottom pressing unit 50, the bottom side ears 103 are kept in a half-folded state, and when the bottom cover 101 is bent, the bottom side ears 103 are limited between the side walls 104 and the bottom cover 101.

Referring to fig. 4, the feeding unit 10 includes a bottom plate 11 disposed on the frame and a sliding plate 12 slidably connected to the bottom plate 11, the bottom plate 11 is disposed to incline from high to low toward the material taking unit 20, a surface of the sliding plate 12 is parallel to the gravity direction and slides along the bottom plate 11 from high to low under the action of gravity, a position-limiting blocking piece 13 is disposed near the lower end of the bottom plate 11, and the box blank 100 is disposed between the sliding plate 12 and the position-limiting blocking piece 13 in an upright state. The inclination angle of the base plate 11 may be set to 60 degrees. The limiting blocking piece 13 is a first blocking piece 131 arranged at the lower end of the bottom plate 11 and a second blocking piece 132 positioned right above the protrusion and fixed on the frame 1, and a space is formed between the first blocking piece 131 and the second blocking piece 132 to allow the box blank 100 to pass through.

Referring to fig. 5, the material taking unit 20 includes a first driving cylinder 21, a sliding frame 22, a guiding rail 23 and a suction cup mechanism 24, the guiding rail 23 and the first driving cylinder 21 are horizontally disposed on the frame 1, the sliding frame 22 is slidably connected to the guiding rail 23 and is fixedly connected to a moving portion of the first driving cylinder 21, a suction cup of the suction cup mechanism 23 is disposed on the sliding frame 22, a cup opening of the suction cup faces the feeding unit 10, and the sliding frame 22 is driven by the first driving cylinder 21 to move horizontally along the guiding rail 23 to drive the suction cup to move. The suction cup mechanism 24 is a pneumatic suction cup mechanism.

The box-expanding unit 30 is a horizontally disposed flat plate provided on the machine frame 1, and has a rounded arc angle that can act against the box side wall 104 of the box blank 100 to expand the box when the box blank 100 passes by. Four lateral walls 104 of box are the parallelogram deformation compression state when the case blank state, and the sucking disc adsorbs on one of four lateral walls 104, is called and adsorbs the lateral wall, and the arc angle is used in this adjacent lateral wall that adsorbs the lateral wall, and when the sucking disc drove the motion of case blank 100, under the pulling force of sucking disc to adsorbing the lateral wall and the promotion of dull and stereotyped radius arc angle to adsorbing the lateral wall (the pulling force is the opposite direction with the pulling force), four lateral walls 104 of box of case blank state are the parallelogram deformation and strut, accomplish the expansion of case blank.

Referring to fig. 6, the ear folding unit 40 includes two second driving cylinders 41, a moving portion of each second driving cylinder 41 is fixedly connected to a block 42, the two second driving cylinders 41 are disposed opposite to each other, and a cylinder body of the second driving cylinder 41 is disposed obliquely so that the moving portion moves obliquely upward to fold the two bottom side ears 103 of the box body.

Referring to fig. 7, the bottom pressing unit 50 includes a third driving cylinder 51 moving upward and downward and a fourth driving cylinder 52 moving upward and downward, a horizontally disposed bottom pressing plate 53 is fixedly connected to a moving portion of the third driving cylinder 51, a horizontally disposed tongue folding plate 54 is fixedly connected to a moving portion of the fourth driving cylinder 52, the tongue folding plate 54 and the bottom pressing plate 53 are arranged in parallel side by side, and a bottom cover 101 of the box blank 100 reaches the bottom pressing plate 53 after passing through the tongue folding plate 54 under the driving of the material taking unit 20; referring to fig. 8, the latch limiting unit 60 includes a fifth driving cylinder 61 capable of driving horizontal movement and a horizontally disposed limiting rod 62, a moving portion of the fifth driving cylinder 61 is fixedly connected to one end of the limiting rod 62, the limiting rod 62 is located between the bottom pressing plate 53 and the folded latch plate 54 and is parallel to the bottom pressing plate 53 and the folded latch plate 54, and the heights of the bottom pressing plate 53, the folded latch plate 54 and the limiting rod 62 when the third driving cylinder 51 and the fourth driving cylinder 53 do not operate are equal. In this embodiment, the front end of the stroke of the bottom pressing unit 50 is provided with a baffle 80 at intervals for limiting the moving stroke distance of the box blank 100.

In this embodiment, the tongue-folding plate 54 includes a first plate 541 and a second plate 542, which are fixed to each other, and the second plate 542 is located between the bottom-pressing plate 53 and the first plate 541 and at least partially protrudes above the first plate 541. In the tongue folding plate 54 having this structure, after the bottom cover 101 passes through the tongue folding plate 54, the tongue 102 can be bent in advance by the portion of the second plate 542 protruding from the first plate 541.

The tongue-and-groove position-limiting unit 60 further includes a position-limiting plate 63 disposed on the opposite side of the stroke of the position-limiting rod 62 for limiting the stroke distance of the position-limiting rod 62.

The sole pressing unit 50 further comprises a sixth driving cylinder 55 capable of driving horizontal movement, and the moving part of the sixth driving cylinder 55 is connected with the third driving cylinder 51 and the fourth driving cylinder 52. When the operation of the bottom-pressing unit 50 is required, the sixth drive cylinder 55 pushes out the third drive cylinder 51 and the fourth drive cylinder 52.

Referring to fig. 9, the box opening apparatus further includes a box discharging unit 70 for discharging the box after opening. The box body sending-out unit 70 includes a seventh driving cylinder 71 capable of driving horizontal movement and a push plate 72, a moving portion of the seventh driving cylinder 71 is fixedly connected to the push plate 72, and a moving direction of the moving portion of the seventh driving cylinder 71 is perpendicular to a moving direction of the moving portion of the sixth driving cylinder 55.

The first, second, third, fourth, fifth, sixth, and seventh drive cylinders 21, 41, 51, 52, 61, 55, and 71 are cylinders, and the moving parts thereof are moving members driven by pistons.

The operation process of the unpacking device in the embodiment is as follows:

the box blanks 100 are stacked on the bottom plate 11 of the feeding unit 10 and are positioned between the sliding plate 12 and the limiting baffle 13, and the bottom cover 101 of the box blanks 100 is placed downwards; the moving part of the first driving cylinder 21 of the material taking unit 20 moves forwards to reach the feeding unit 10 and sucks the box blank 100 at the foremost end of the feeding unit 10 through a sucking disc, and then drives the box blank 100 to move back; in the process of return stroke, the box blank 100 firstly passes through the box expansion unit 30, and under the action of the pulling force of the sucking disc and the pushing force of the inverted arc angle of the flat plate of the box expansion unit 30, the four side walls 104 of the box blank are expanded through parallelogram deformation to complete box expansion; the box blank after being expanded further passes through the ear folding unit 40, and under the pushing action of two second driving cylinders 41 at two opposite sides of the ear folding unit 40, two bottom side ears 103 of the box blank 100 are folded inwards; after the bottom side lug 103 is folded by the lug folding unit 40, the box blank 100 reaches the bottom pressing unit 50 (at this time, the second driving cylinder 41 of the lug folding unit 40 still has an abutting effect on the bottom side lug 103, and the bottom side lug 103 still keeps a folded state), under the condition that the box blank 100 is pulled by the sucker, the tongue folding plate 54 of the bottom pressing unit 50 acts on the bottom cover 101 and bends the bottom cover 101 towards the four side walls 104, and when the bottom cover 101 is bent in place (namely, the box blank 100 reaches the baffle 80 in front of the bottom pressing unit 50, the included angle of the bottom cover 101 relative to the horizontal direction is 10 degrees at this time, namely, the bottom cover 101 is bent in place), the first driving cylinder 21 stops acting; the fifth driving cylinder 61 acts to enable the limiting rod 62 to horizontally extend out and fall above the position between the bottom cover 101 and the tongue buckle 102, then the fourth driving cylinder 52 acts to enable the tongue folding plate 54 to move upwards, under the limiting action of the limiting rod 62 on the tongue buckle 102 in the vertical direction, the tongue buckle 102 is bent by the upward tongue folding plate 54, the tongue buckle 102 is aligned to the inside of the box, at the moment, the position of the tongue folding plate 54 is kept still, and the fifth driving cylinder 61 acts to drive the limiting rod 62 to retract so as to eliminate the limiting on the bottom cover 101 and the tongue buckle 102; then, the third driving cylinder 51 operates and drives the bottom pressing plate 53 to move upward to push the bottom cover 101 upward and press the tongue 102 into the box, thereby completing the fastening of the bottom cover 101, and in order to ensure the fastening of the bottom cover 101, the third driving cylinder 51 can drive the bottom pressing plate 53 to repeatedly fasten the bottom cover 101. And finally, the seventh driving cylinder 71 acts to drive the push plate 72 to act so as to push the box body out of the equipment.

The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents.

Claims (12)

1. An automatic carton opening device for a tongue-buckle carton is disclosed, wherein the carton is a hexahedral carton and comprises a bottom cover, tongue buckles integrally extending from one side edge of the bottom cover, bottom side lugs positioned at two opposite sides of the bottom cover, and four side walls connecting the bottom cover and the two bottom side lugs; the method is characterized in that: the equipment comprises a rack, and a feeding unit, a taking unit, an expansion unit, a lug folding unit, a bottom pressing unit and a tongue buckle limiting unit which are arranged on the rack; the feeding unit is used for placing carton blanks when the cartons are not opened and can continuously feed, the taking unit is used for grabbing the carton blanks and can drive the carton blanks to pass through the box expanding unit and the lug folding unit in sequence along linear motion and then reach the upper part of the bottom pressing unit, the box expanding unit is used for pushing the carton side walls on the carton blanks in the box blank motion process to enable the four side walls of the carton blanks to be deformed into a rectangular body, the lug folding unit is used for folding two bottom side lugs on the carton blanks after the rectangular body is formed into a box, the bottom pressing unit is used for bending the bottom cover and pressing the tongue buckle into the box body, the tongue buckle limiting unit is used for assisting the tongue buckle to keep a box-entering posture, and the distance between the bottom pressing unit and the lug folding unit is smaller than the width of the bottom cover along the box blank motion direction; the box blank is sucked from the feeding unit through the material taking unit and is driven to the bottom pressing unit, and in the process that the box blank is driven by the material taking unit, the box blank sequentially passes through the box expanding unit for box expansion and the bottom side ear folding unit for bottom end folding, and then the bottom pressing unit and the tongue buckle limiting unit are used for bottom cover folding and tongue buckle folding.

2. The apparatus of claim 1 for automatically opening a box of a tongue-and-groove carton, wherein: the box body sending-out unit is used for sending the box body after the box is opened out of the equipment.

3. The apparatus of claim 1 for automatically opening a box of a tongue-and-groove carton, wherein: this feed unit is including establishing the bottom plate in the frame and with this bottom plate sliding connection's sliding plate, and this bottom plate orientation is got the material unit direction and is set up from high to low slope, and the parallel gravity direction of face of this sliding plate slides from high to low along the bottom plate under the effect of gravity, and the nearly low end department of this bottom plate is equipped with spacing separation blade, and the case blank is upright state and arranges in between this sliding plate and spacing separation blade.

4. The apparatus of claim 1 for automatically opening a box of a tongue-and-groove carton, wherein: the material taking unit comprises a first driving cylinder, a sliding frame, a guide rail and a sucker mechanism, wherein the guide rail and the first driving cylinder are horizontally arranged on a rack, the sliding frame is connected with the guide rail in a sliding manner and fixedly connected with a moving part of the first driving cylinder, a sucker of the sucker mechanism is arranged on the sliding frame, a disc opening of the sucker faces towards the feeding unit, and the sliding frame is driven by the first driving cylinder to move along the guide rail so as to drive the sucker to move.

5. The apparatus of claim 1 for automatically opening a box of a tongue-and-groove carton, wherein: the box expanding unit is a flat plate which is horizontally arranged on the rack and is provided with a rounded arc angle which can generate propping action on the side wall of the box body of the box blank when the box blank passes through so as to expand the box.

6. The apparatus of claim 1 for automatically opening a box of a tongue-and-groove carton, wherein: the ear folding unit comprises two second driving cylinders, the moving part of each second driving cylinder is fixedly connected with a piece, the two second driving cylinders are arranged oppositely, and the cylinder bodies of the second driving cylinders are obliquely arranged to enable the moving parts to move obliquely upwards relatively so as to fold two bottom side ears of the box body respectively.

7. The apparatus of claim 1 for automatically opening a box of a tongue-and-groove carton, wherein: the bottom pressing unit comprises a third driving cylinder and a fourth driving cylinder, the third driving cylinder is arranged in an up-down mode, the fourth driving cylinder is arranged in an up-down mode, a moving part of the third driving cylinder is fixedly connected with a horizontally arranged bottom pressing plate, a moving part of the fourth driving cylinder is fixedly connected with a horizontally arranged folding tongue buckling plate, the folding tongue buckling plate and the bottom pressing plate are arranged in parallel side by side, and a bottom cover of the box blank is driven by the material taking unit to firstly pass through the folding tongue buckling plate and then reach the bottom pressing plate; the tongue buckle limiting unit comprises a fifth driving cylinder capable of driving horizontal movement and a horizontally arranged limiting rod, the moving part of the fifth driving cylinder is fixedly connected with one end of the limiting rod, the limiting rod is positioned between the pressing bottom plate and the folded tongue buckle plate and is parallel to the pressing bottom plate and the folded tongue buckle plate, and the heights of the pressing bottom plate, the folded tongue buckle plate and the limiting rod when the third driving cylinder and the fourth driving cylinder do not act are equal.

8. The apparatus of claim 7 for automatically opening a box of a tongue-and-groove carton, wherein: the tongue-folding plate comprises a first plate and a second plate which are fixedly connected, wherein the second plate is positioned between the bottom pressing plate and the first plate, and at least part of the second plate protrudes above the first plate.

9. The apparatus of claim 7 for automatically opening a box of a tongue-and-groove carton, wherein: the tongue buckle limiting unit also comprises a limiting plate which is arranged at the opposite side of the travel of the limiting rod and is used for limiting the travel distance of the limiting rod.

10. The apparatus of claim 7 for automatically opening a box of a tongue-and-groove carton, wherein: the bottom pressing unit also comprises a sixth driving cylinder capable of driving horizontal movement, and a moving part of the sixth driving cylinder is connected with the third driving cylinder and the fourth driving cylinder.

11. The apparatus of claim 2, wherein: the box body sending-out unit comprises a seventh driving cylinder and a push plate, wherein the seventh driving cylinder can drive the seventh driving cylinder to move horizontally, the moving part of the seventh driving cylinder is fixedly connected with the push plate, and the moving direction of the moving part of the seventh driving cylinder is vertical to the moving direction of the moving part of the sixth driving cylinder.

12. The apparatus of claim 1 for automatically opening a box of a tongue-and-groove carton, wherein: the front end of the stroke of the bottom pressing unit is provided with a baffle plate at intervals for limiting the moving stroke distance of the box blank.

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