CN108528781B

CN108528781B - Express delivery piece packaging method

Info

Publication number: CN108528781B
Application number: CN201810394650.7A
Authority: CN
Inventors: 王辉
Original assignee: Anhui Qilushi Engineering Technology Development Co ltd
Current assignee: Anhui Qilushi Engineering Technology Development Co ltd
Priority date: 2018-04-27
Filing date: 2018-04-27
Publication date: 2020-08-14
Anticipated expiration: 2038-04-27
Also published as: CN108528781A

Abstract

The invention belongs to the technical field of logistics packaging, and particularly relates to a express delivery packaging method, which comprises the following steps: placing the express delivery piece into a logistics box with an inflatable air bag and an air bag pressure detection device inside, wherein when the express delivery piece is placed into the logistics box, the air bag is in an uninflated state; buckling a box cover and a box body of the logistics box and connecting and fastening the box cover and the box body by adopting a fastening piece; inflating an air bag in the logistics box by using an inflation inlet arranged on the outer wall of the logistics box, and detecting the pressure change of the air bag by using an air bag pressure detection device; when the pressure of the air bag reaches a preset value, stopping inflating the air bag; the inflatable air bag and the air pressure detection device are arranged in the logistics box, so that the air bag can be ensured to fully compress the express delivery piece through detecting the air pressure of the air bag, the express delivery piece is prevented from shaking in the transportation process, and the protection effect on the express delivery piece is effectively improved.

Description

Express delivery piece packaging method

Technical Field

The invention belongs to the technical field of logistics packaging, and particularly relates to a packaging method of an express delivery.

Background

Nowadays, with the rise of electronic commerce in China, the logistics industry is also developed unprecedentedly, and the delivery quantity of express delivery in China is high to tens of millions or even hundreds of millions of pieces every day. Most express delivery pieces on the market are packaged by cartons, and the packaging mode mainly has the following defects: first, after the express delivery reaches the receiver, the carton used for wrapping the express delivery is generally directly discarded, so a large amount of paper garbage is generated, and although the carton can be recycled, the cost required by recycling still consumes a large amount of social resources, and secondary pollution such as waste water and waste gas is easily generated. Secondly, the guard action of carton is limited, to some fragile, vulnerable express delivery piece, leads to express delivery piece to damage very easily among the transportation, although can place buffers such as disposable gasbag in the carton for strengthening the protection among the prior art, these buffers are difficult to guarantee to closely support simultaneously with carton and express delivery piece and lean on, and express delivery piece can appear rocking wantonly in the carton, and the protective effect is limited. Thirdly, the carton packing mode is too crude, even be unpacked apart by other people in transit and also can recover easily, and hardly by the recipient discovery, this probably leads to the express delivery both sides' privacy to suffer disclosure.

Disclosure of Invention

The invention aims to provide an anti-collision express item packaging method.

In order to achieve the purpose, the invention provides the following technical scheme:

a method of packaging a courier comprising the steps of:

step 1: placing the express delivery piece into a logistics box with an inflatable air bag and an air bag pressure detection device inside, wherein when the express delivery piece is placed into the logistics box, the air bag is in an uninflated state;

step 2: buckling a box cover and a box body of the logistics box and connecting and fastening the box cover and the box body by adopting a fastening piece;

and step 3: inflating an air bag in the logistics box by using an inflation inlet arranged on the outer wall of the logistics box, and detecting the pressure change of the air bag by using an air bag pressure detection device; when the pressure of the air bag reaches a preset value, stopping inflating the air bag;

the logistics boxes are foldable logistics boxes, and before the mails are loaded into the logistics boxes, the logistics boxes need to be unfolded from a folded state to a use state.

The signal output end of the air bag pressure detection device is connected with the controller, an air source control valve for inflating the air bag is also connected with the controller, and when the controller detects that the air pressure measured by the air bag pressure detection device reaches the preset air pressure of the controller, the controller automatically controls the control valve of the air source to be closed.

In step 2, the specific installation steps of the fastener are as follows: firstly, a pull belt with inverted teeth penetrates through a belt hole in the edge of a box cover from top to bottom, and the lower end of the pull belt is ensured to penetrate into a one-way tensioning mechanism arranged at the upper end of the side wall of the box body; then the retaining ring with the inverted teeth is sleeved on the pull belt, the pull belt is pulled upwards with force, and the retaining ring is pressed downwards at the same time until the box cover is tightly attached to the box body

The invention has the technical effects that:

the logistics box adopts the disposable locking component to connect the box body and the box cover, once the logistics box is opened, the logistics box is difficult to recover without special equipment, the risk that the express delivery piece is opened by other people in the transportation process is effectively avoided, and the confidentiality effect is improved;

the inflatable air bag and the air pressure detection device are arranged in the logistics box, so that the air bag can be ensured to fully compress the express delivery piece through detecting the air pressure of the air bag, the express delivery piece is prevented from shaking in the transportation process, and the protection effect on the express delivery piece is effectively improved.

Drawings

Fig. 1 is a schematic perspective view of a material flow box according to an embodiment of the present invention;

FIG. 2 is a top view of a logistics box provided by an embodiment of the present invention;

FIG. 3 is a front view of a logistics box and a partial enlarged view thereof provided by an embodiment of the present invention;

FIG. 4 is a side view of a logistics box and a partial enlarged view thereof as provided by an embodiment of the present invention;

FIG. 5 is a schematic perspective view of the logistics box of the present invention, illustrating the box and box cover structure for clarity, wherein the inflatable air bag of the present invention is not shown;

FIG. 6 is an enlarged partial view of I of FIG. 5;

FIG. 7 is a schematic perspective view of a folded state of the logistics box provided by an embodiment of the invention;

FIG. 8 is a perspective view of a disposable latching component provided by an embodiment of the present invention;

fig. 9 is a front view of a disposable latching component and a partial enlarged view thereof provided by an embodiment of the present invention.

Detailed Description

The invention will be further explained with reference to fig. 1 to 9:

in order that the objects and advantages of the invention will be more clearly understood, the invention will now be described in detail with reference to the following examples. It is to be understood that the following text is merely illustrative of one or more specific embodiments of the invention and does not strictly limit the scope of the invention as specifically claimed.

As shown in fig. 1 and 5, a logistics box comprises a box body enclosed by a bottom wall 10 and four side walls 11, and a box cover 12 detachably connected with the upper end of the box body.

Preferably, the bottom edges of the four side walls 11 of the box body are hinged with the four side edges of the bottom wall 10, so that each side wall 11 can be turned over towards the surface of the bottom wall 10, as shown in fig. 7; a limiting portion is arranged between each two adjacent two side walls 11, and the limiting portion is assembled to prevent the two adjacent side walls 11 from turning in a direction away from the bottom wall 10 when the adjacent edges of the two adjacent two side walls 11 are collinear. Each side wall 11 of the logistics box can be folded towards the surface of the bottom wall 10, and the folded logistics box is as shown in fig. 7, so that the occupied space is greatly reduced, and the logistics box is convenient to store and transport. The invention provides a reusable logistics box, which can be temporarily stored after a receiver receives express mails and then is uniformly recovered by a logistics company. When dispatching the goods, the logistics company can correspondingly collect a certain deposit or bind the safekeeping obligation of the logistics box with credit investigation systems of some payment software on the market, so as to encourage the user to safekeep the logistics box. The invention can greatly reduce the usage amount of the disposable packaging box in the logistics industry, avoid unnecessary resource waste, effectively reduce the treatment difficulty of express garbage and have positive influence on environmental protection.

Further, a locking mechanism is arranged between the two adjacent side walls 11 and is assembled to be capable of switching between a locking station and an unlocking station, when the locking mechanism is located at the locking station, the locking mechanism can enable the two adjacent side walls 11 to be kept relatively fixed, and when the locking mechanism is located at the unlocking station, the two adjacent side walls 11 can move independently. Locking mechanism can be dead with each part lock when the thing flow box expandes, avoids leading to the thing flow box to warp because exogenic action.

Preferably, as shown in fig. 5 and 6, the limiting portion includes a first U-shaped groove 115 disposed on a side edge of one of the two adjacent side walls 11, and a second U-shaped groove 116 disposed on a side edge of the other side wall 11, a notch of the first U-shaped groove 115 is disposed toward an outer side of the side wall 11 where the first U-shaped groove is located, the second U-shaped groove 116 protrudes inside the side wall 11 where the second U-shaped groove 116 is located, the notch of the second U-shaped groove 116 is disposed toward a middle portion of the side wall 11 where the second U-shaped groove is located along a direction parallel to the side wall 11 where the second U-shaped groove is located, and the first U-shaped groove 115 and the second U-shaped. In this embodiment, two opposite side walls 11 are located inside the other two opposite side walls 11, the first U-shaped groove 115 is disposed on the two inner side walls 11, and the second U-shaped groove 116 is disposed on the other two side walls 11, as shown in fig. 2. When the logistics box is unfolded, the first U-shaped groove 115 and the second U-shaped groove 116 are mutually abutted, so that the unfolding angle of the adjacent side wall 11 can be limited.

Preferably, as shown in fig. 6, the locking mechanism includes an insert plate 118 disposed in the first U-shaped groove 115, and a slot 117 disposed on a slot wall of the second U-shaped groove 116, the insert plate 118 and the slot 117 are inserted in a horizontal direction and are in clearance fit with each other, the side wall 11 where the insert plate 118 and the second U-shaped groove 116 are disposed is provided with

locking ports

119 and 1110 facing each other in a vertical direction, the bottom surface of the case cover 12 is provided with a locking pin 123 engaged with the

locking ports

119 and 1110, and when the case cover 12 is to be placed on the case body, the locking pin 123 can be just inserted into the

locking ports

119 and 1110 and is blocked with the insert plate 118. The locking mechanism in the embodiment is associated with the opening and closing state of the box cover 12, and the locking mechanism can be unlocked only when the box cover 12 is detached, so that the stability and the reliability of the structure after the logistics box is packaged are effectively ensured.

Preferably, two opposite side walls 11 of the box body are directly hinged to the bottom wall 10, so that the box body can be attached to the bottom wall 10 in parallel when being turned over towards the bottom wall 10, the other two opposite side walls 11 are respectively hinged to two bosses 102 arranged at the edge of the bottom wall 10, the height of one boss 102 is equal to the thickness of one side wall 11, the height of the other boss 102 is equal to the thickness of the side walls 11 at two sides, the side walls 11 can be prevented from each other when being folded, and the side walls 11 can be attached to each other layer by layer after being folded.

Preferably, the outer side of the lower end of each side wall 11 is a right-angle side, the inner side of the lower end of each side wall 11 is a round angle, and the lower end of each side wall 11 is provided with a sealing strip 112, so that the lower end of each side wall 11 can be tightly attached to the bottom wall 10 when each side wall 11 is unfolded; similarly, the inner side of the top end of each hinged support at the edge of the bottom wall 10 is a round angle, the outer side of each hinged support is a right angle, and the top end of each hinged support is provided with a sealing strip 112 to ensure the whole sealing performance of the logistics box.

Further, a disposable locking member is provided between the top surface of each side wall 11 and the edge of the cover 12, the locking member is assembled such that the case body and the cover 12 can be separated only when the structure thereof is damaged, and the locking member can be replaced from the inside of the case body. Adopt disposable hasp part to connect box and case lid 12, in case open the thing flow box, hardly recover under the condition of not with the help of professional equipment, effectively avoided the express delivery piece by the risk that other people opened in the transportation, improved secret effect.

Preferably, as shown in fig. 8 and 9, the locking member includes a pulling belt 13 and a buckle 15, and both a belt surface of the pulling belt 13 and an inner wall of the buckle 15 are provided with inverted teeth, so that the pulling belt 13 can only move back and forth in the buckle 15 in one direction; the top surface of each side wall 11 of the box body is provided with a one-way tensioning mechanism 14, the one-way tensioning mechanism 14 is assembled to be not blocked when the drawstring 13 penetrates into the one-way tensioning mechanism 14 from top to bottom, and the one-way tensioning mechanism 14 can clamp the drawstring 13 when the drawstring 13 moves in the one-way tensioning mechanism 14 from bottom to top; the edge of the box cover 12 is provided with a hole 122 for the drawstring 13 to vertically pass through, the hole 122 is just opposite to the one-way tensioning mechanism 14 when viewed in the vertical direction, the part of the drawstring 13 protruding out of the upper end of the box cover 12 is inserted into the retaining ring 15, the retaining ring 15 and the ribbon are assembled in such a way that the retaining ring 15 can only move downwards relative to the ribbon, and the retaining ring 15 is blocked with the top surface of the box cover 12.

Preferably, as shown in fig. 3, the one-way tensioning mechanism 14 includes a trapezoidal slide 141 with a narrow top and a wide bottom, a trapezoidal slider 142 is disposed in the trapezoidal slide 141, the trapezoidal slider 142 is disposed in a reciprocating manner along a vertical direction, a vertical through hole 145 through which the pull tape 13 passes is disposed on the trapezoidal slider 142, and a transverse through hole 143 penetrates through two slope surfaces of the trapezoidal slider 142, two horizontal rollers 144 are disposed in the transverse through hole 143, axes of the two rollers 144 are parallel to the slope surfaces of the trapezoidal slider 142, the two rollers 144 are disposed on two sides of the vertical through hole 145, and a pressure spring is disposed between a bottom surface of the trapezoidal slider 142 and a bottom surface of the trapezoidal slide 141.

Further, the lower end of the trapezoidal slide 141 is connected with a section of guide hole 148, and the guide hole 148 is connected to the inner wall of the box body in a downward and oblique and smooth manner, so that the pull belt 13 can be conveniently taken out of the unidirectional garbage mechanism after the logistics box is opened.

Preferably, the upper end of the trapezoidal slide rail 141 is further connected with a section of rectangular slide rail 146, the upper end of the trapezoidal slide block 142 is provided with a guide block 147 which forms a sliding fit with the rectangular slide rail 146, and the trapezoidal slide block 142 can be ensured to slide along the vertical direction all the time by the cooperation of the rectangular slide rail 146 and the guide block 147.

Preferably, the buckle 15 includes a sheet-shaped body, the middle of the body is provided with a strip-shaped hole for the drawstring 13 to pass through, one of the inner walls of the strip-shaped hole in the length direction is provided with inverted teeth, one of the ends of the strip-shaped hole is provided with an easily torn line 151, and the easily torn line 151 extends from one end of the strip-shaped hole to the edge of the body.

Preferably, a circle of pull ring 152 is further arranged around the body, the pull ring 152 is coplanar with the body, the pull ring 152 is connected with the outer end of the easy-tearing line 151 into a whole, and the pull ring 152 is connected with the periphery of the body through the easy-tearing seam. The body edge is provided with an escape slot 153 for a finger to snap the pull ring 152

Furthermore, inflatable air bags 101 are arranged on at least three adjacent inner walls in the logistics box, an inflation inlet 111 which penetrates through the outer wall and is communicated with the inner cavity of the air bag 101 is arranged on the outer wall of the logistics box, an air pressure sensor is arranged inside the air bag 101, and a signal output interface of the air pressure sensor is arranged on the outer wall of the logistics box. Through the detection to gasbag 101 atmospheric pressure, can ensure that gasbag 101 fully compresses tightly the express delivery piece, avoid the express delivery piece to produce in the transportation and rock, effectively improved the safeguard effect to the express delivery piece.

Preferably, as shown in fig. 4, the bottom surface of the box cover 12 is provided with air bags 101, the air bags 101 in the box body are communicated with each other, a branch air passage 114 is arranged inside the side wall 11 where the inflation port 111 is located, one end of the branch air passage 114 is communicated with the inflation port 111, and the other end is communicated to the upper end of the side wall 11, an air passage 121 for supplying air to the air bags 101 on the bottom surface of the box cover 12 is arranged in the box cover 12, an air inlet of the air passage 121 is located at the edge of the bottom surface of the box cover 12 and is arranged opposite to the upper end of the branch air passage 114, when the box cover 12 is fastened with the box body, the air passage 121 can be joined with the branch air passage 114, and a sealing ring 115 is arranged at a seam between the air passage 121 and the branch air passage 114, in a specific implementation process. When the box cover 12 is separated from the box body, the branch air passage 114 is synchronously separated from the air passage 121, and the quick exhaust of the upper air bag 101 and the lower air bag 101 can be realized. Because the air bag is decompressed after the box cover 12 is disassembled, if the logistics box is opened halfway by a person, the air bag is difficult to recover again without special equipment, and the confidentiality of the logistics box is further improved. It should be particularly noted that the principle of the invention for improving the security of the logistics box is as follows: if the logistics box is opened midway, the logistics box can be easily known by a receiver, but not the logistics box has strong damage resistance, theoretically, the damage resistance can be damaged even if the logistics box is stronger, and therefore, the consideration of the confidentiality of the logistics box from the aspect of damage resistance is not significant.

A one-way valve 113 is arranged in the inflation port 111, and the one-way valve 113 is set to only allow air to enter the air bag 101 and not exhaust the air bag 101. The inner sides of four side walls 11 of the box body are respectively provided with an air bag 101, the air bags 101 are communicated with each other to form a ring, two opposite air bags 101 are connected with the side walls 11 where the two opposite air bags 101 are respectively located, and the other two opposite air bags 101 and the side walls 11 where the two opposite air bags are respectively located are of a separated structure.

The method for packaging the express delivery by adopting the logistics box comprises the following specific steps:

step 1: placing the express delivery piece into a logistics box with an inflatable air bag 101 and an air bag pressure detection device inside, wherein when the express delivery piece is placed into the logistics box, the air bag 101 is in an uninflated state;

step 2: buckling a box cover 12 of the logistics box with a box body and connecting and fastening the box cover 12 and the box body by adopting a fastening piece;

and step 3: inflating the air bag 101 in the logistics box by using an inflation inlet 111 arranged on the outer wall of the logistics box, and detecting the pressure change of the air bag 101 by using an air bag pressure detection device; when the pressure of the air bag 101 reaches a preset value, the air bag 101 is stopped to be inflated;

The signal output end of the air bag pressure detection device is connected with the controller, an air source control valve for inflating the air bag 101 is also connected with the controller, and when the controller detects that the air pressure measured by the air bag pressure detection device reaches the preset air pressure of the controller, the controller automatically controls the control valve of the air source to be closed.

In step 2, the specific installation steps of the fastener are as follows: firstly, a pull belt 13 with inverted teeth penetrates from top to bottom through a hole 122 on the edge of a box cover 12, and the lower end of the pull belt 13 is ensured to penetrate into a one-way tensioning mechanism 14 arranged at the upper end of a side wall 11 of the box body; then the snap ring 15 with the inverted teeth is sleeved on the drawstring 13, the drawstring 13 is pulled upwards by force, and the snap ring 15 is pressed downwards at the same time until the box cover 12 is tightly attached to the box body.

Claims

1. A method of packaging a courier, comprising the steps of:

step 1: placing the express delivery piece into a logistics box with an inflatable air bag (101) and an air bag pressure detection device inside, wherein when the express delivery piece is placed into the logistics box, the air bag (101) is in an uninflated state;

step 2: buckling a box cover (12) of the logistics box with the box body and connecting and fastening the box cover and the box body by adopting a fastening piece;

and step 3: an air bag (101) in the logistics box is inflated by an inflation inlet (111) formed in the outer wall of the logistics box, and meanwhile, the pressure change of the air bag (101) is detected by an air bag pressure detection device; when the pressure of the air bag (101) reaches a preset value, the air bag (101) is stopped to be inflated;

the logistics box is a foldable logistics box and comprises a box body and a box cover (12), wherein the box body is formed by enclosing a bottom wall (10) and four side walls (11), and the box cover is detachably connected with the upper end of the box body; the bottom edges of four side walls (11) of the box body are hinged with four side edges of the bottom wall (10) so that each side wall (11) can turn over towards the surface of the bottom wall (10), a limiting part is arranged between each two adjacent side walls (11), and the limiting parts can prevent the two adjacent side walls (11) from turning over towards the direction far away from the bottom wall (10) when the adjacent edges of the two adjacent side walls (11) are collinear; a locking mechanism is further arranged between the two adjacent side walls (11), the locking mechanism is assembled to be capable of switching between a locking station and an unlocking station, when the locking mechanism is positioned at the locking station, the locking mechanism can enable the two adjacent side walls (11) to be relatively fixed, and when the locking mechanism is positioned at the unlocking station, the two adjacent side walls (11) can independently move; the limiting part comprises a first U-shaped groove (115) arranged on the side edge of one side wall (11) of two adjacent side walls (11) and a second U-shaped groove (116) arranged on the side edge of the other side wall (11), the notch of the first U-shaped groove (115) is arranged towards the outer side of the side wall (11) where the first U-shaped groove is located, the second U-shaped groove (116) protrudes out of the inner side of the side wall (11) where the second U-shaped groove is located, the notch of the second U-shaped groove (116) is arranged towards the middle of the side wall (11) along the direction parallel to the side wall (11) where the second U-shaped groove is located, and the first U-shaped groove (115) and the second U-shaped groove (116) are; the locking mechanism comprises an inserting plate (118) arranged in a first U-shaped groove (115) and a slot (117) formed in the wall of a second U-shaped groove (116), the inserting plate (118) and the slot (117) are inserted in the horizontal direction and are in clearance fit, locking openings (119) and (1110) which are right aligned in the vertical direction are formed in the side wall (11) where the inserting plate (118) and the second U-shaped groove (116) are located, a locking pin (123) matched with the locking openings (119) and (1110) is arranged on the bottom surface of the box cover (12), and when the box cover (12) covers the box body, the locking pin (123) can be just inserted into the locking openings (119) and (1110) and is blocked with the inserting plate (118); two opposite side walls (11) of the box body are directly hinged on the bottom wall (10) to enable the box body to be attached to the bottom wall (10) in parallel when the box body is turned towards the bottom wall (10), the other two opposite side walls (11) are respectively hinged on two bosses (102) arranged at the edge of the bottom wall (10), the height of one boss (102) is equal to the thickness of one layer of side wall (11), and the height of the other boss (102) is equal to the thickness of the side walls (11) at two sides; the outer side of the lower end of each side wall (11) is a right-angle side, the inner side of the lower end of each side wall (11) is a round angle, and the lower end of each side wall (11) is provided with a sealing strip (112), so that the lower end of each side wall (11) can be tightly attached to the bottom wall (10) when each side wall (11) is unfolded; the inner side of the top end of each hinged support at the edge of the bottom wall (10) is a round angle, the outer side of each hinged support is a right angle, and a sealing strip (112) is arranged at the top end of each hinged support; before loading mails, the logistics boxes need to be unfolded from a folded state to a use state;

in step 2, a disposable locking part is arranged between the top surface of each side wall (11) and the edge of the box cover (12), and the locking part is assembled to separate the box body from the box cover (12) only when the structure of the locking part is damaged; the lock catch component comprises a pull belt (13) and a snap ring (15), wherein inverted teeth are arranged on the belt surface of the pull belt (13) and the inner wall of the snap ring (15), so that the pull belt (13) can only move back and forth in the snap ring (15) along a single direction; the top surface of each side wall (11) of the box body is provided with a one-way tensioning mechanism (14), the one-way tensioning mechanism (14) is assembled to be free from blocking when the drawstring (13) penetrates into the one-way tensioning mechanism (14) from top to bottom, and the one-way tensioning mechanism (14) can clamp the drawstring (13) when the drawstring (13) moves in the one-way tensioning mechanism (14) from bottom to top; the edge of the box cover (12) is provided with a hole (122) for the pull belt (13) to vertically penetrate through, the hole (122) is arranged opposite to the one-way tensioning mechanism (14) when viewed in the vertical direction, the part of the pull belt (13) protruding out of the upper end of the box cover (12) is inserted into the buckle ring (15), the buckle ring (15) and the binding belt are assembled in a way that the buckle ring (15) can only move downwards relative to the binding belt, and the buckle ring (15) is blocked and connected with the top surface of the box cover (12); the one-way tensioning mechanism (14) comprises a trapezoidal slide way (141) which is narrow at the top and wide at the bottom, a trapezoidal slide block (142) is arranged in the trapezoidal slide way (141), the trapezoidal slide block (142) is arranged in a reciprocating mode along the vertical direction, a vertical through hole (145) for a pull belt (13) to pass through is formed in the trapezoidal slide block (142), and a transverse through hole (143) penetrates through two slope surfaces of the trapezoidal slide block (142), two horizontal rollers (144) are arranged in the transverse through hole (143), the axes of the two rollers (144) are parallel to the slope surfaces of the trapezoidal slide block (142), the two rollers (144) are respectively arranged on two sides of the vertical through hole (145), and a pressure spring is arranged between the bottom surface of the trapezoidal slide way (141) and the bottom surface of the trapezoidal slide block; the lower end of the trapezoid slideway (141) is connected with a section of guide hole (148), and the guide hole (148) is communicated to the inner wall of the box body in a downward and smooth way; the upper end of the trapezoid slide way (141) is also connected with a section of rectangular slide way (146), and the upper end of the trapezoid slide block (142) is provided with a guide block (147) which is in sliding fit with the rectangular slide way (146); the buckle ring (15) comprises a plate-shaped body, a strip-shaped hole for the drawstring (13) to pass through is formed in the middle of the body, inverted teeth are arranged on one inner wall of the strip-shaped hole in the length direction, an easily-torn line (151) is arranged at one end of the strip-shaped hole, and the easily-torn line (151) extends to the edge of the body from one end of the strip-shaped hole; a circle of pull ring (152) is further arranged on the periphery of the body, the pull ring (152) is coplanar with the body, the pull ring (152) is connected with the outer end of the easy-tearing line (151) into a whole, and the pull ring (152) is connected with the periphery of the body through the easy-tearing seam; the edge of the body is provided with an avoidance groove (153) so that fingers can buckle the pull ring (152);

the specific installation steps of the fastener are as follows: firstly, a pull belt (13) with inverted teeth penetrates from top to bottom from a hole (122) on the edge of a box cover (12), and the lower end of the pull belt (13) is ensured to penetrate into a one-way tensioning mechanism (14) arranged at the upper end of the side wall (11) of the box body; then, a snap ring (15) with inverted teeth is sleeved on the pull belt (13), the pull belt (13) is pulled upwards with force, and the snap ring (15) is pressed downwards at the same time until the box cover (12) is tightly attached to the box body.

2. The method of packaging an courier of claim 1, wherein: the signal output end of the air bag pressure detection device is connected with the controller, an air source control valve used for inflating the air bag (101) is also connected with the controller, and when the controller detects that the air pressure measured by the air bag pressure detection device reaches the preset air pressure of the controller, the controller automatically controls the air source control valve to be closed.