A packing box convenient to load and unload

Abstract

The utility model relates to a kind of packaging box convenient to assemble and disassemble, including box and lid, track, multiple pulleys and the inner liner for supporting product are equipped in the box, the pulley is assembled on track, for supporting the inner liner;Wherein, the pulley closest to the opening of box is front support pulley, and it includes wheel frame, support arm and support wheel, one end of the support arm is connected with wheel frame by pin shaft, and the other end is hinged with the axle of support wheel, the support arm can rotate with pin shaft as center, to change the position height of support wheel;First limiting part and second limiting part are equipped on the wheel frame;The utility model sets up the inner liner and track pulley structure that can extend outside box, sets up front support pulley with adjustable height support wheel, so that the inner liner can smoothly slide out of box and directly support on ground, completely avoids the interference of lifting rope and box, realizes the safe, efficient quick assembly and disassembly of bulky product in side opening packaging box.

Description

Technical Field

[0001] This utility model relates to the field of packaging box technology, and in particular to a packaging box that is easy to load and unload. Background Technology

[0002] In the logistics and transportation of large products such as large equipment, precision instruments, and irregularly shaped components, it is usually necessary to first seal the products in specialized packaging boxes before transferring them to logistics transport vehicles for transshipment. For products with certain specific structures or loading and unloading requirements, side-opening packaging boxes are required to facilitate loading and unloading of the products.

[0003] However, existing side-opening packaging boxes have significant limitations in practical applications. Traditional lifting equipment, such as bridge cranes and gantry cranes, can cause interference between the lifting ropes or lifting devices carrying the product and the top and sides of the box during lifting, making the operation difficult.

[0004] While using support tools such as flatbed trucks or forklifts can be applied to some shorter products, when dealing with longer products, the limited effective load-bearing length of the forklift forks or flatbed trucks makes it difficult to provide sufficient and stable support during operation. This can easily cause the product to sway, tilt, or even slip during movement. In addition, the limited operating space also makes it difficult to use these tools flexibly, causing great trouble for the loading and unloading process.

[0005] Therefore, there is an urgent need in this field for a packaging box that can effectively solve the problems of side-opening packaging boxes and loading and unloading large products. Utility Model Content

[0006] In order to solve the problems existing in the background art, the present invention provides a packaging box that is easy to load and unload.

[0007] The technical solution is as follows: A packaging box that is easy to load and unload includes a box body and a box lid. The box body is provided with a track, multiple pulleys, and an inner lining for supporting the product. The pulleys are mounted on the track to support the inner lining. The pulley closest to the opening of the box body is a front support pulley, which includes a wheel frame, a support arm, and a support wheel. One end of the support arm is connected to the wheel frame via a pin, and the other end is hinged to the axle of the support wheel. The support arm can rotate around the pin, thereby changing the position and height of the support wheel. The wheel frame is provided with a first limiting part and a second limiting part. The first limiting part restricts the support wheel to a first height, so that the support wheel is adapted to the track. The second limiting part is used to restrict the support wheel to a second height, so that the support wheel is supported on the plane on which the box body is placed.

[0008] As a further preferred embodiment, the first limiting portion is a notch formed on the wheel frame, the side surface of which can abut against the axle of the supporting wheel.

[0009] As a further preferred embodiment, the second limiting part includes a receiving groove formed on the wheel frame, a limiting pin is slidably fitted in the receiving groove, a spring is provided between the limiting pin and the bottom wall of the receiving groove, and the front end of the limiting pin extends out of the receiving groove. The support arm is provided with a limiting groove that allows the front end of the limiting pin to be inserted.

[0010] As a further preferred embodiment, a release button is slidably provided in the limiting groove. Pressing the release button can push the limiting pin out of the limiting groove to release the limiting relationship between the two.

[0011] As a further preferred embodiment, the front end of the limiting pin has a rounded head structure; One side of the support arm is chamfered to fit the front end of the limiting pin. As the support arm rotates from the first limiting part to the second limiting part, the front end of the limiting pin is squeezed by the chamfered area on the side of the support arm, causing the limiting pin to retract and extend again when passing through the limiting groove.

[0012] As a further preferred embodiment, the wheel frame is provided with a vertical groove, in which a shaft frame for mounting a pin is slidably fitted, and a spring is provided between the shaft frame and the wheel frame.

[0013] As a further preferred embodiment, the wheel frame has a threaded hole through the vertical groove, and a limit rod is installed in the threaded hole. The lower end of the limit rod is close to the shaft frame, and a manual knob is installed at the upper end.

[0014] As a further preferred embodiment, the wheel frame is provided with left and right lower limit wheels.

[0015] As a further preferred embodiment, a locking hole is provided at a relative position on the inner wall and the inner lining of the box, and a locking pin is inserted into the locking hole together.

[0016] Compared with the prior art, the present invention has the following advantages: 1. This utility model, by setting an inner lining that can extend out of the box and a track pulley structure, and setting a front support pulley with adjustable height support wheels, allows the inner lining to slide smoothly out of the box and be directly supported on the ground, completely avoiding interference between the lifting rope and the box, and realizing safe, efficient and rapid loading and unloading of large products in side-opening packaging boxes.

[0017] 2. The first limiting part of this utility model adopts a notch structure, which limits the working position of the support wheel on the track inside the box through a simple structure, ensuring the stability and smoothness of the lining when it moves inside the box.

[0018] 3. The second limiting part of this utility model achieves automatic locking of the support wheel when it is in the ground support position through the cooperation of the limiting pin pushed by the spring and the upper limit groove of the support arm. This structure effectively prevents accidents caused by the reset of the support wheel during loading and unloading operations.

[0019] 4. This utility model provides a quick and convenient manual unlocking method by setting a release button, which allows operators to easily reset the support wheels from the ground support state to the track state inside the box, greatly improving the convenience of operation.

[0020] 5. The front end of the limiting pin of this utility model adopts a round head structure and cooperates with the chamfer of the support arm, so that when the support arm rotates from the track position to the ground position, it can automatically squeeze the limiting pin and complete the locking, realizing the automation of the support wheel height conversion, and the operation is smooth and labor-saving.

[0021] 6. This utility model provides buffering capacity for the front support pulley through the elastically adjustable axle frame structure, enabling it to adaptively adjust when passing over slightly uneven surfaces, effectively absorbing impact and vibration, and protecting the product and packaging box.

[0022] 7. This utility model can flexibly limit the downward travel of the shaft frame by manually adjusting the limit rod with a knob, thereby accurately controlling the pressure of the support wheel on the ground or the ground clearance, and enhancing the equipment's adaptability to different working conditions. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0024] Figure 2 This diagram shows the connection relationship between the inner liner, the front support pulley, and other pulleys of this utility model.

[0025] Figure 3 This is a schematic diagram of the front support pulley of this utility model at the first limiting part.

[0026] Figure 4 This is a schematic diagram of the front support pulley of this utility model located at the second limiting part.

[0027] Figure 5 This is a partial enlarged view of the present invention, in which the wheel frame and support arm are cut to show the internal structure of the receiving groove and the limiting groove.

[0028] Figure 6 This is a schematic diagram of the overall structure of the packaging box of this utility model.

[0029] The meanings of the reference numerals in the attached diagram are as follows: 1: Box body, 2: Box cover, 3: Track, 4: Lining, 5: Front support pulley, 50: Lower limit wheel, 51: Wheel frame, 52: Support arm, 521: Limit groove, 522: Chamfer, 53: Support wheel, 531: Axle, 54: Pin, 55: Notch, 561: Receiving groove, 562: Limit pin, 563: Spring, 564: Limit block, 565: Axial groove, 57: Release button, 571: Guide rod, 572: Return spring, 58: Vertical groove, 582: Limit rod, 59: Shaft frame, 591: Spring, 6: Locking pin. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] like Figure 1-6 The illustrated easy-to-load packaging box includes a box body 1 with an opening on one side and a box lid 2 installed at the opening of the box body 1. The box body 1 has a track 3 with multiple pulleys that collectively support an inner liner 4, which supports rod-shaped products. The inner liner 4 can move along the track 3 via the pulleys. When loading or unloading products, the inner liner 4 can be pulled out along the opening of the box body 1, the product placed on the inner liner 4, and then pushed back into the box body 1. However, due to the weight of the product, the end of the inner liner 4 extending out of the box body 1 lacks support. Transferring a large, heavy product onto the inner liner 4 causes it to become unbalanced and tilt towards the protruding end. As the product's center of gravity shifts to the front of the inner liner 4, not only does the entire box become unstable, but it also becomes difficult to push the product back into the box.

[0032] Therefore, this utility model designs a foldable front support pulley 5 at the very front of the inner liner 4 to support the inner liner 4, and after being pushed into the box body 1, it can be folded in the same way and, in cooperation with the track, supports the inner liner 4 and the product. (Reference) Figures 1 to 4Specifically, the front support pulley 5 is the pulley closest to the opening of the housing 1. It includes a wheel frame 51, two support arms 52, and a support wheel 53. The two support arms 52 are located on both sides of the wheel frame 51. One end of each support arm 52 is connected to the wheel frame 51 via a pin 54. The other end of each support arm 52 is mounted on the support wheel 53. Specifically, the other end of each support arm 52 is hinged to the axle of the support wheel 53. There is a certain gap between the support arm 52 and the side surface of the support wheel 53. The support arm 52 can rotate around the pin 54, thereby changing the position and height of the support wheel 53. Furthermore, the wheel frame 51 is provided with a first limiting part and a second limiting part. The first limiting part restricts the support wheel 53 to a first height. When the support wheel 53 is at the first height, it is compatible with the track 3 and can move along the track 3. The second limiting part is used to limit the support wheel 53 to the second height, so that the support wheel 53 is supported on the plane of the box 1. When the support wheel 53 is at the second height, it can be supported on the plane (ground or table) of the box 1. When transferring the product to the inner liner 4, the support wheel 53 can be supported on the bottom surface to maintain the balance of the inner liner 4. The product can be loaded by pushing the inner liner 4 into the box 1, and pulled outward when the product is removed. Furthermore, the wheel frame 51 is provided with left and right lower limiting wheels 50, which can clamp the track 3 from the left and right sides to limit the left and right movement of the wheel frame 51.

[0033] For details, please refer to the following: Figure 1 and Figure 6 In a preferred embodiment, two parallel tracks 3 are arranged inside the housing 1, with multiple pulleys spaced apart on each track 3. A locking hole is provided at a relative position on the inner wall of the housing 1 and the inner lining 4, and a locking pin 6 is inserted into both locking holes to restrict the forward and backward movement of the inner lining 4. Furthermore, a limiting part 4 is also provided on the inner side of the lid 2 to prevent the inner lining 4 from moving forward and backward; when the lid 2 is closed, the limiting part 4 blocks the front end of the inner lining 4.

[0034] refer to Figure 3 and 4 In one specific embodiment, the first limiting part is a notch 55 formed on the wheel frame 51, the side surface of which can abut against the axle 531 of the support wheel 53. Specifically, the notch 55 has a surface that restricts the axle 531 from rotating circumferentially. This surface restricts the height of the support wheel 53 to just match the track 3. Therefore, when the inner liner 4 is pushed into the housing 1, the support arm 52 rotates backward accordingly. When the axle 531 naturally rests against the inner surface of the notch 55, if the inner liner 4 is pushed in further, the support wheel 53 will transfer to the track 3 to participate in the support of the product.

[0035] refer to Figures 3 to 5In one specific embodiment, the second limiting part 56 includes receiving grooves 561 formed on both sides of the wheel frame 51. The receiving grooves 561 correspond to the positions of the support arm 52. Each receiving groove 561 is slidably fitted with a limiting pin 562. A spring 563 is provided between the limiting pin 562 and the bottom wall of the receiving groove 561. Through the action of the spring 563, the front end of the limiting pin 562 can extend out of the receiving groove 561. Furthermore, the front end of the limiting pin 562 has a round head structure. A limiting groove 521 is provided on the support arm 52 in the area corresponding to the limiting pin 562, allowing the front end of the limiting pin 562 to be inserted. When the support wheel 53 moves from the first limiting part position to the second limiting part position, since the limiting pin 562 is in the area that the support arm 52 passes through when rotating, the limiting pin 562 can be inserted into the limiting groove 521. Due to the insertion relationship between the two, the support arm 52 cannot move left or right. Therefore, the state of the support wheel 53 is changed from the support track 3 to the support ground and maintained.

[0036] refer to Figure 5 It should be noted that an axial groove 565 is also provided in the accommodating groove 561 along the length direction of the groove. The surface of the limiting pin 562 is provided with a limiting block 564 that slides with the axial groove 565. The maximum extension length of the front end of the limiting pin 562 can be limited by the axial groove 565 and the limiting block 564.

[0037] In addition, in order to automatically press the limit pin 562 and lock it when the support arm 52 rotates from the track position to the ground position, a chamfer 522 is made on one side of the support arm 52, which can improve the smoothness of the operation of the support wheel height conversion.

[0038] In addition, to release the limiting relationship between the limiting pin 562 and the limiting groove 521, a release button 57 is slidably provided in the limiting groove 521. Specifically, the limiting groove 521 is a stepped groove penetrating the support arm 52. Multiple guide rods 571 are provided on the stepped surface of the groove, and each guide rod 571 is fitted with a return spring 572. The release button 57 is slidably connected to the guide rods 571. Pressing the release button 57 pushes the limiting pin 562 out of the limiting groove 521, thus releasing the limiting relationship between them. It should be noted that the stepped groove limits the extreme positions of the press and rebound of the release button 57, which can be achieved by providing a structure such as the limiting hole 564 and the axial groove 565 described above. Of course, other similar limiting structures can also be used.

[0039] Furthermore, this utility model also provides a flexible, height-adjustable axle frame structure, providing cushioning for the front support pulley. Specifically, the axle frame structure includes an axle frame 59, wherein a vertical groove 58 is provided on each side of the wheel frame 51, and an axle frame 59 for mounting a pin 54 is slidably fitted in each vertical groove 58. A spring 591 is provided between the axle frame 59 and the wheel frame 51. By setting the wheel frame 51 to move within the vertical groove 58, in conjunction with the spring 591, the support wheel 53 can adaptively adjust when passing over slightly uneven surfaces, effectively absorbing impact and vibration, and protecting the product and packaging box.

[0040] It is particularly important to note that the height of the limiting groove 521 on the support arm 52 is much greater than the height of the vertical groove 58. While the support wheel 53 adjusts adaptively, the limiting pin 562 and the limiting groove 521 also move relative to each other.

[0041] Furthermore, a threaded hole 581 is formed on each side of the top of the wheel frame 51 through a vertical slot 58. A limit rod 582 is installed in the threaded hole 581. The lower end of the limit rod 582 is close to the shaft frame 59 to limit the position of the shaft frame 59. A manual knob 583 is installed on the upper end of the limit rod 582, and the height of the lower end of the limit rod 582 can be adjusted by rotating the limit rod 582. This allows for precise control of the pressure of the support wheel 53 on the ground or its clearance from the ground, enhancing the equipment's adaptability to different working conditions.

[0042] The embodiments described above are merely preferred embodiments of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications, improvements, and substitutions without departing from the inventive concept, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A packaging box that is easy to load and unload, comprising a box body (1) and a box lid (2), characterized in that: The box (1) is provided with a track (3), multiple pulleys and an inner lining (4) for supporting the product. The pulleys are mounted on the track (3) to support the inner lining (4). Among them, the pulley closest to the opening of the box (1) is the front support pulley (5), which includes a wheel frame (51), a support arm (52) and a support wheel (53). One end of the support arm (52) is connected to the wheel frame (51) through a pin (54), and the other end is hinged to the wheel axle (531) of the support wheel (53). The support arm (52) can rotate around the pin (54) to change the position and height of the support wheel (53). The wheel frame (51) is provided with a first limiting part and a second limiting part. The first limiting part restricts the support wheel (53) to a first height so that the support wheel (53) is adapted to the track (3). The second limiting part is used to restrict the support wheel (53) to a second height so that the support wheel (53) is supported on the plane on which the box (1) is placed.

2. The easy-to-load and unload packaging box according to claim 1, characterized in that: The first limiting part is a notch (55) formed on the wheel frame (51), and the side surface of the notch (55) can abut against the axle (531) of the support wheel (53).

3. The easy-to-load and unload packaging box according to claim 1, characterized in that: The second limiting part includes a receiving groove (561) opened on the wheel frame (51), a limiting pin (562) is slidably assembled in the receiving groove (561), a spring is provided between the limiting pin (562) and the bottom wall of the receiving groove (561), and the front end of the limiting pin (562) extends out of the receiving groove (561). The arm (52) is provided with a limiting groove (521) that allows the front end of the limiting pin (562) to be inserted.

4. The easy-to-load and unload packaging box according to claim 3, characterized in that: A release button (57) is slidably provided in the limiting groove (521). Pressing the release button (57) can push the limiting pin (562) out of the limiting groove (521) to release the limiting relationship between the two.

5. The easy-to-load and unload packaging box according to claim 3, characterized in that: The front end of the limiting pin (562) has a rounded head structure; One side of the support arm (52) is chamfered (522) to fit the front end of the limiting pin (562). When the support arm (52) rotates from the first limiting part to the second limiting part, the front end of the limiting pin (562) is squeezed by the chamfered (522) area on the side of the support arm (52), causing the limiting pin (562) to retract and extend again when passing through the limiting groove (521).

6. The easy-to-load and unload packaging box according to claim 1, characterized in that: A vertical groove (58) is provided on the wheel frame (51), and a shaft frame (59) for installing a pin (54) is slidably assembled in the vertical groove (58). A spring is provided between the shaft frame (59) and the wheel frame (51).

7. The easy-to-load and unload packaging box according to claim 6, characterized in that: The wheel frame (51) has a threaded hole through the vertical groove (58), and a limit rod (582) is installed in the threaded hole. The lower end of the limit rod (582) is close to the shaft frame (59), and the upper end is equipped with a manual knob.

8. The easy-to-load and unload packaging box according to claim 1, characterized in that: The wheel frame (51) is provided with left and right lower limit wheels (50).

9. The easy-to-load and unload packaging box according to claim 1, characterized in that: A locking hole is provided on the inner wall of the box (1) and the inner lining (4) at a relative position, and a locking pin (6) is inserted into the locking hole.

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