An airtight packing box and a lifting hook assembly for the packing box

Abstract

The present invention relates to an airtight packaging box and a lifting hook assembly for a packaging box. The lifting hook assembly for a packaging box includes a mounting plate, a handle, a left handle seat, a lifting hook, and a right handle seat. The lifting hook includes a hook seat and a hook body. The hook seat is fixedly connected to the mounting plate, and an intermediate bushing is provided on the hook seat. Shaft holes are provided on the left handle seat and the right handle seat, or the left handle seat, the right handle seat and the mounting plate cooperate to form a shaft hole. The shaft hole extends along the rotation axis and is used for rotatably assembling a handle rotating shaft and an intermediate shaft. The two ends of the shaft hole are respectively for the intermediate shaft and the handle rotating shaft to penetrate. The middle part of the intermediate shaft penetrates into the intermediate bushing, and the two ends respectively penetrate into the shaft holes. The two ends of the intermediate shaft are fixedly connected to the handle rotating shafts to transmit torque between the two handle rotating shafts and the intermediate shaft. The lifting hook assembly for a packaging box provided by the present invention is not only light in weight and small in occupied space, but also ingenious and simple in structure, and can realize the lifting and hoisting functions of the packaging box at low cost.

Description

Technical Field

[0001] The present invention relates to a packing box, in particular to a lifting hook assembly for a packing box and an airtight packing box using the lifting hook assembly for the packing box. Background Art

[0002] Packing boxes with regular shapes can not only protect products but also facilitate the transfer of products. For example, for some products that require airtight packaging and are relatively heavy, using a packing box can facilitate manual and mechanized shipment. In order to ensure safe and convenient lifting and handling of the packing box, such packing boxes in the prior art usually have handles for manual handling and lifting rings (lifting lugs / hooks) for mechanical lifting to achieve the functions of manual handling and mechanical lifting.

[0003] In order to further reduce the total weight and occupied space of the packing box, there has also appeared in the prior art a component that integrally designs the handle and the lifting ring. For example, the packing box disclosed in the patent document with the authorization announcement number CN211125521U has a special handle that integrally designs the handle and the hook. It has a rod-shaped connecting portion and two bent portions connected to both ends of the connecting portion. One end of each bent portion is connected to the connecting portion and the other end is fixed to the box body. The bent portion and the connecting portion form an angle of 30°, 60° or 45°. The bent portion can be semicircular, elliptical or rectangular, etc. The bent portion is bent upward to facilitate cooperation with the lifting hook of the crane. The connecting portion is a straight rod or a connecting rod with a curved structure, which can facilitate manual handling.

[0004] As can be seen from the above, in the prior art, bent portions are added at both ends of the connecting rod-shaped handle to form a lifting ring. In this way, it can indeed save the space and structure of separately setting a hook. However, this handle is essentially a "large ring body" that connects the space enclosed by the rod body of the lifting ring and the handle. Even though there are bends and angles, the lifting ring lacks independence. Therefore, there is still a risk that the lifting hook shifts from the lifting ring to the handle during mechanical lifting, resulting in an unstable combination between the lifting ring and the lifting hook during use. Moreover, the rod body of the handle needs to support the lifting ring, so it is a fixed structure with an unchangeable position and requires a strong material to ensure sufficient strength. Therefore, the entire handle occupies a large space on the surface of the box body. Summary of the Invention

[0005] The purpose of the present invention is to provide a lifting hook assembly for a packing box to solve the problems of unstable load-bearing structure and large occupied space on the surface of the packing box existing in the prior art. At the same time, an airtight packing box using the lifting hook assembly for the packing box is provided.

[0006] A hook assembly for a packing box according to the present invention is characterized in that the hook assembly for the packing box has a set rotation axis and includes a mounting plate, a handle, an intermediate shaft, and a left handle seat, a hook, and a right handle seat that are fixed on the mounting plate and distributed along the rotation axis. The mounting plate is used to fixedly connect the hook assembly for the packing box to the box body of the packing box. The handle includes two handle rotating shafts distributed along the rotation axis, a handle grip spaced from the handle rotating shafts, and a handle side arm connecting the handle grip and the handle rotating shaft. The hook includes a hook seat and a hook body. The hook seat is fixedly connected to the mounting plate, and an intermediate shaft sleeve is provided on the hook seat. Shaft holes are provided on the left handle seat and the right handle seat, or the left handle seat, the right handle seat and the mounting plate cooperate to form shaft holes. The shaft holes extend along the rotation axis for rotatably assembling the handle rotating shafts and the intermediate shaft. Two ends of the shaft holes are respectively for the intermediate shaft and the handle rotating shaft to penetrate. The middle part of the intermediate shaft penetrates into the intermediate shaft sleeve, and both ends respectively penetrate into the shaft holes. Both ends of the intermediate shaft are fixedly connected to the handle rotating shafts to transmit torque between the two handle rotating shafts and the intermediate shaft.

[0007] The hook assembly for the packing box provided by the present invention, through a clever design concept, optimally combines the handle for manual lifting and the hook for mechanical lifting to reduce the weight of the packing box and make the layout of the packing box compact. The hook assembly for the packing box is an optimized combination of a handle and a hook. The handle rotating shaft is connected to the hook seat through an intermediate shaft. On the one hand, when the hook bears the load, part of the acting force can be distributed to the handle rotating shafts and the left and right handle seats on the left and right sides through the intermediate shaft, so that the entire assembly and the mounting plate are stressed dispersedly, improving the bearing capacity. On the other hand, when the handle bears the load, the intermediate shaft can transmit torque to make the left and right handle rotating shafts rotate synchronously, and the rotation is more flexible. And the intermediate shaft is in turn shared by the hook seat with part of the acting force, which can also make the entire assembly and the mounting plate stressed dispersedly to avoid damage caused by concentrated stress on each component such as the handle, the handle rotating shaft, and the handle seat. Therefore, the hook assembly for the packing box of the present invention is not only light in weight and small in occupied space, but also ingenious and simple in structure, and can realize the lifting and hoisting functions of the packing box at low cost. Thus, it overcomes the problems existing in the separate handle and lifting ring (lifting lug / hook). Under the same load condition, by using the hook assembly for the packing box, not only can the total weight of the packing box be reduced by about 30%, and the outer dimension of the package be reduced by about 3 cm, but also this structure can bear at least more than 150 kg under the condition that the safety factor has been considered.

[0008] Further, both the left handle seat and the right handle seat include a bearing bush and ear plates connected to both sides of the bearing bush. The bearing bush is used to cooperate with the mounting plate to form a shaft hole extending along the rotation axis, and the ear plates are used to be fixedly connected to the mounting plate.

[0009] Furthermore, the mounting plate is provided with through holes for the connecting piece to pass through, and the connecting piece is used to fix the packing box to the box body of the packing box with a hook assembly. The through holes are divided into two groups on the left and right, and each group of the through holes is divided into two rows on the upper and lower sides and distributed along a straight line. An axis assembly space for assembling the handle shaft of the handle is reserved between the upper and lower rows of the through holes in each group, and the mounting plate at the location of the axis assembly space cooperates with the bearing shell to form the axis hole; through holes for the connecting piece to pass through are provided on the ear plates of the left handle seat and the right handle seat, and the through holes correspond to the through holes on the mounting plate and are used to pass the connecting piece and fix it to the mounting plate.

[0010] Furthermore, a hook boss is provided on the back side of the hook seat, the intermediate sleeve is arranged on the front side of the hook seat, a hook mounting groove is opened in the center of the mounting plate, the hook mounting groove is used to fix the hook boss, and in the extension direction of the rotation axis, the hook mounting groove is located between the two groups of through holes.

[0011] Furthermore, both sides of the hook body are provided with chamfers to avoid and protect the lifting rope, so as to avoid damage to the lifting rope after multiple liftings.

[0012] An airtight packaging box of the present invention comprises a box body, characterized in that it also comprises a packaging box hook assembly fixedly connected to the box body, the packaging box hook assembly has a set rotation axis, comprises a mounting plate, a handle, and a left handle seat, a hook, and a right handle seat fixed to the mounting plate and distributed along the rotation axis, the mounting plate is used to fix the packaging box hook assembly to the box body of the packaging box, the handle comprises two handle rotating shafts distributed along the rotation axis, a handle handle spaced apart from the handle rotating shaft, and a handle side connecting the handle handle and the handle rotating shaft. arm; the hook comprises a hook seat and a hook body, the hook seat is fixedly connected to the mounting plate, and an intermediate shaft sleeve is arranged on the hook seat; an axial hole is arranged on the left handle seat and the right handle seat, or the left handle seat, the right handle seat and the mounting plate cooperate to form an axial hole, the axial hole extends along the rotation axis and is used for rotating and assembling the handle shaft and the intermediate shaft, and the two ends of the axial hole are respectively provided for the intermediate shaft and the handle shaft to penetrate; the middle part of the intermediate shaft penetrates into the intermediate shaft sleeve, and the two ends penetrate into the axial hole respectively, and the two ends of the intermediate shaft are fixedly connected to the handle shaft to transmit torque between the two handle shafts and the intermediate shaft.

[0013] The airtight packaging box provided by the present invention has a packaging box hook assembly installed therein that is not only light in weight and occupies little space, but also has an ingenious and simple structure, and can realize the lifting and hoisting functions of the packaging box at low cost. Thus, the problems existing in separate handles and lifting rings (lifting ears / hooks) are overcome. Under the same load conditions, the packaging box hook assembly can not only reduce the total weight of the packaging box by about 30% and reduce the outer dimensions of the packaging by about 3 cm, but also, considering the safety factor, the structure can bear at least 150 kg.

[0014] Furthermore, the packing box hook assembly is installed on the outside of the packing box, and also includes a back block welded inside the packing box and matched with the packing box hook assembly one by one. The bottom of the back block has a back block bottom plate, and the outer surface of the back block bottom plate is used to fit the inner wall surface of the box body. The edges of the back block bottom plate protrude to the outside of the back block to form a flange. The flange of the back block bottom plate is used to weld with the inner wall surface of the box body to meet the airtightness of the packing box. The back block is provided with a back block connection hole, which is a threaded hole for threaded connection with a connector and is a blind hole. The mounting plate of the packing box hook assembly is provided with a through hole for the connector to pass through, and the box body is provided with a hole for the connector to pass through. The connector is used to connect and fix the packing box hook assembly to the packing box and the back block. The above-mentioned optimized combination of the packing box hook assembly and the back block welded on all sides can meet the lifting and hoisting functions while also meeting the airtightness conditions in the box.

[0015] Furthermore, the left handle seat and the right handle seat both include bearings and ear plates connected to both sides of the bearings, the bearings are used to cooperate with the mounting plates to form an axial hole extending along the axis of rotation, and the ear plates are used to be fixedly connected to the mounting plates; the through holes on the mounting plate of the packing box hook assembly are divided into two groups, left and right, each group of through holes is divided into two rows, upper and lower, and distributed along a straight line, and an axial assembly space for assembling the handle shaft of the handle is reserved between the upper and lower rows of perforations in each group, and the mounting plate where the axial assembly space is located cooperates with the bearings to form the axial hole; through holes for connecting parts to pass through are provided on the ear plates of the left and right handle seats, and the through holes correspond to the through holes on the mounting plates, and are used to pass the connecting parts and fix them to the mounting plates.

[0016] Furthermore, a hook boss is provided on the back side of the hook seat, the intermediate sleeve is arranged on the front side of the hook seat, a hook mounting groove is opened in the center of the mounting plate, the hook mounting groove is used to fix the hook boss, and in the extension direction of the rotation axis, the hook mounting groove is located between the two groups of through holes.

[0017] Furthermore, both sides of the hook body are provided with chamfers to avoid and protect the lifting rope, so as to avoid damage to the lifting rope after multiple liftings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of an embodiment of an airtight packaging box of the present invention in a use state;

[0019] Figure 2 yes Figure 1 A partial schematic diagram of the internal structure of the airtight packaging box;

[0020] Figure 3 yes Figure 1 A schematic diagram of the structure of a lifting hook assembly for a packaging box;

[0021] Figure 4 is Figure 3 an exploded view of each component of the hook assembly for the packing case in

[0022] Figure 5 is Figure 2 a structural schematic diagram of the back block in

[0023] In the figure:

[0024] 1. Box body; 2. Hook assembly for packing case; 21. Left handle seat; 211. Handle retaining groove; 22. Mounting plate; 221. Hook mounting groove; 23. Intermediate shaft; 24. Hook; 241. Hook body; 242. Chamfered slope; 243. Hook boss; 244. Hook seat; 245. Intermediate shaft sleeve; 25. Right handle seat; 26. Connecting piece; 27. Handle; 271. Handle side arm; 272. Handle rotating shaft; 273. Handle grip; 3. Back block; 31. Back block connecting hole; 32. Back block bottom plate. Specific embodiments

[0025] An embodiment of the airtight packing case (hereinafter also simply referred to as the packing case) of the present invention is shown in Figures 1 - 5 and includes a box body 1, a hook assembly 2 for the packing case, and a back block 3. The hook assembly 2 for the packing case is installed outside the packing case, and the back block 3 is welded inside the packing case and is correspondingly matched with the hook assembly 2 for the packing case. The bottom of the back block 3 has a back block bottom plate 32, and the outer surface of the back block bottom plate 32 is used to fit with the box body 1. The four peripheral edges of the back block bottom plate 32 protrude outward to the outside of the back block 3 to form a flange. The flange of the back block bottom plate 32 is used to be welded to the inner wall surface of the box body 1 to avoid defects during welding around the back block 3, and through the welding of the flange around the back block bottom plate 32 to the inner wall surface of the box body 1, the airtight performance of the packing case can be satisfied.

[0026] A number of back block connecting holes 31 are provided on the back block 3. The back block connecting holes 31 are threaded holes and blind holes. The hook assembly 2 for the packing case is fixed to the packing case box body 1 and the back block 3 by using a connecting piece 26. The connecting piece 26 in this embodiment is a "standard connecting piece" composed of a screw, a spring washer and a plain washer. Corresponding parts of the box body 1 of the packing case need to be drilled. When drilling, according to the position of the back block 3 welded on the inner wall surface of the box body 1, the corresponding position of the packing case is drilled, and then the hook assembly 2 for the packing case is connected and fixed to the packing case and the back block 3 by using the connecting piece 26.

[0027] The lifting hook assembly 2 for the packing box is located outside the packing box, and includes a left handle seat 21, a mounting plate 22, an intermediate shaft 23, a lifting hook 24, a right handle seat 25, a connecting member 26, and a handle 27. The handle 27 of the lifting hook assembly 2 for the packing box can be used for manual lifting, while the lifting hook 24 is used for hoisting by a lifting machine. The lifting hook assembly 2 for the packing box has a set rotation axis, which extends horizontally when the lifting hook assembly 2 for the packing box is in use, and the handle 27 rotates around the rotation axis.

[0028] The handle 27 includes two handle rotating shafts 272 distributed along the rotation axis, a handle grip 273 arranged in parallel and at intervals with the handle rotating shaft 272, and two handle side arms 271. Each handle side arm 271 extends in a direction perpendicular to the rotation axis and is connected between one handle rotating shaft 272 and one end of the handle grip 273.

[0029] The lifting hook 24 includes a hook seat 244 and a hook-shaped hook body 241 fixed on the hook seat 244. When the hook seat 244 is installed, a hook boss 243 is provided near the back side of the packing box, and the hook boss 243 is used for fixed connection with the mounting plate 22. A middle shaft sleeve 245 is provided on the front side of the hook seat 244, and the middle shaft sleeve 245 is used for sleeving the intermediate shaft 23. Chamfered slopes 242 are provided on both sides of the hook body 241 to avoid and protect the lifting rope during use, so as to prevent damage to the lifting rope after multiple hoistings.

[0030] The mounting plate 22 is used to fixedly connect the lifting hook assembly 2 for the packing box to the box body 1 of the packing box. Through holes for the connecting member 26 to pass through are provided on the mounting plate 22. The through holes are divided into two groups on the left and right, and each group of through holes is further divided into two rows, upper and lower, and are distributed in a straight line. An axial assembly space for the handle rotating shaft 272 of the handle 27 is left between the upper and lower rows of through holes in each group. A hook mounting groove 221 is provided in the center of the mounting plate 22 for fixedly connecting the hook boss 243 of the lifting hook 24. Specifically, after the rectangular hook boss 243 on the back of the lifting hook 24 is fitted with the rectangular hook mounting groove 221 in the center of the mounting plate 22, they are welded together so that the lifting hook 24 and the mounting plate 22 form an integral body and are reliably connected. In the extending direction of the rotation axis, the hook mounting groove 221 is located between the two groups of through holes.

[0031] Both the left handle seat 21 and the right handle seat 25 include a bearing shell and ear plates connected to both sides of the bearing shell. The bearing shell is in a semi-hollow cylindrical shape. Through holes for the connecting member 26 to pass through are provided on the ear plates. The through holes correspond to the through holes on the mounting plate 22, and are used for sleeving the connecting member 26 and fixing it to the mounting plate 22. The bearing shell is used to cooperate with the mounting plate 22 to form an axial hole extending along the rotation axis. The axial hole is used for rotatably assembling the handle rotating shaft 272 of the handle 27 and the intermediate shaft 23, and both ends of the axial hole are respectively for the intermediate shaft 23 and the handle rotating shaft 272 to penetrate into.

[0032] The middle part of the intermediate shaft 23 penetrates into the intermediate shaft sleeve 245 at the lower part of the lifting hook 24, and both ends penetrate into the shaft holes formed by the cooperation of the left handle seat 21, the right handle seat 25 and the mounting plate 22 respectively. Both ends of the intermediate shaft 23 are fixedly connected to the handle rotating shafts 272 to transmit torque between the two handle rotating shafts 272 and the intermediate shaft 23, so that the handle 27 can be reliably fixed and rotate flexibly. The way that both ends of the intermediate shaft 23 are fixedly connected to the handle rotating shafts 272 is specifically welding (the left and right handle seats 25 are buckled after welding), or, in the extending direction of the rotation axis, the gap between the two handle rotating shafts 272 on both sides is slightly smaller than the length of the intermediate shaft 23, and the elastic force formed by the U-shaped structure of the handle 27 is used to press the two handle rotating shafts 272 and the intermediate shaft 23 tightly, thus forming a fixed connection, and torque can be transmitted between the two handle rotating shafts 272 and the intermediate shaft 23 by relying on friction.

[0033] Through the above structure, the functions of lifting and hoisting can be realized simultaneously. In addition, handle retaining grooves 211 are respectively arranged on the side surfaces at both ends of the left handle seat 21 and the right handle seat 25. The handle retaining grooves 211 are used for retaining and cooperating with the handle side arms 271 of the handle 27 in the direction of rotating around the rotation axis, so as to limit the rotation angle of the handle 27 for manual lifting.

[0034] When the above embodiment of the packaging box of the present invention is specifically produced, first, the connection and fixation between the packaging box lifting hook assembly 2 and the packaging box are realized through the threaded holes on the back block 3 and its matching connecting piece 26, and then the airtight function of the packaging box is satisfied by welding the back block 3 around the periphery. In this way, when the four groups of packaging box lifting hook assemblies 2 are fixedly connected to the back block 3 and the box body 1 in place, not only can the handle 27 in the packaging box lifting hook assembly 2 be used to lift the packaging box, but also the lifting hook 24 in the packaging box lifting hook assembly 2 can be used to lift the packaging box with a hoisting machine.

[0035] The embodiment of the packaging box lifting hook assembly of the present invention adopts the structure of the packaging box lifting hook assembly 2 in the above embodiment of the packaging box.

[0036] In addition, in other embodiments of the present invention, if the airtightness of the packaging box is not strictly required, the back block may not be used to weld from the inside of the box body to ensure the airtightness at the perforation of the connecting piece, but the packaging box lifting hook assembly may be directly fastened with the connecting piece, which also belongs to the embodiment of realizing the technical solution of the present invention. In addition, in other embodiments of the present invention, the way that both ends of the intermediate shaft are fixedly connected to the handle rotating shaft, in addition to welding, may also be elastic pressing, pin connection, and riveting.

Claims

1. An airtight packaging box, comprising a box body, characterized in that, It further includes a hook assembly for the packing box fixedly connected to the outside of the box body. The hook assembly for the packing box has a set rotation axis and includes a mounting plate, a handle, a left handle seat, a hook, and a right handle seat that are fixed on the mounting plate and distributed along the rotation axis. The mounting plate is used to fixedly connect the hook assembly for the packing box to the box body of the packing box. The handle includes two handle rotating shafts distributed along the rotation axis, a handle grip spaced from the handle rotating shafts, and a handle side arm connecting the handle grip and the handle rotating shafts. The hook includes a hook seat and a hook body. The hook seat is fixedly connected to the mounting plate, and an intermediate bushing is provided on the hook seat. The left handle seat and the right handle seat are provided with shaft holes, or the left handle seat, the right handle seat and the mounting plate cooperate to form a shaft hole. The shaft hole extends along the rotation axis for rotatably assembling the handle rotating shafts and the intermediate shaft. The two ends of the shaft hole are respectively for the intermediate shaft and the handle rotating shaft to penetrate. The middle part of the intermediate shaft penetrates into the intermediate bushing, and the two ends respectively penetrate into the shaft holes. The two ends of the intermediate shaft are fixedly connected to the handle rotating shafts to transmit torque between the two handle rotating shafts and the intermediate shaft. The packing box further includes a back block welded inside the packing box and corresponding to the hook assembly for the packing box one by one. The bottom of the back block has a back block bottom plate. The outer surface of the back block bottom plate is used to fit with the inner wall surface of the box body. The four peripheral edges of the back block bottom plate protrude outward to form a flange. The flange of the back block bottom plate is used to be welded to the inner wall surface of the box body to meet the airtight performance of the packing box. The back block is provided with a back block connection hole. The back block connection hole is a threaded hole for threaded connection with a connecting piece and is a blind hole. A through hole for the connecting piece to pass through is opened on the mounting plate, and a hole for the connecting piece to pass through is opened on the box body. The connecting piece is used to connect and fix the hook assembly for the packing box to the packing box and the back block.

2. The airtight packaging box according to claim 1, characterized in that, Both the left handle seat and the right handle seat include a bearing shell and ear plates connected to both sides of the bearing shell. The bearing shell is used to cooperate with the mounting plate to form a shaft hole extending along the rotation axis, and the ear plates are used to be fixedly connected to the mounting plate. The through holes on the mounting plate of the hook assembly for the packing box are divided into two groups, left and right. Each group of through holes is further divided into two rows, upper and lower, and distributed in a straight line. An axial assembly space for assembling the handle rotating shaft of the handle is left between the upper and lower rows of through holes in each group. The mounting plate at the location of the axial assembly space cooperates with the bearing shell to form the shaft hole. Through holes for the connecting piece to pass through are opened on the ear plates of the left handle seat and the right handle seat. The through holes correspond to the through holes on the mounting plate for mounting the connecting piece and fixing it to the mounting plate.

3. The airtight packaging box according to claim 2, characterized in that, A hook boss is provided on the back side of the hook seat. The intermediate bushing is arranged on the front side of the hook seat. A hook mounting groove is opened in the center of the mounting plate. The hook mounting groove is used to fixedly connect the hook boss. In the extending direction of the rotation axis, the hook mounting groove is located between the two groups of through holes.

4. The airtight packaging box according to any one of claims 1-3, characterized in that, Bevel chamfers are provided on both sides of the hook body to avoid and protect the lifting rope.

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