Telescopic device for logistics transportation

Abstract

The invention discloses a telescopic device for logistics transportation. The telescopic device comprises a fixed section; the telescopic section is provided with a main telescopic joint and at least one secondary telescopic joint which are sequentially connected in a nested mode in the first direction, and the end, away from the secondary telescopic joint, of the main telescopic joint is nested in the fixed section; the protection plate assembly comprises fixed protection plates, first floating protection plates and second floating protection plates, the fixed protection plates are arranged on the two sides of the top of the fixed section, the first floating protection plates are arranged on the two sides of the top of the main telescopic joint and arranged on the outer sides of the fixed protection plates, and the second floating protection plates are arranged on the two sides of the top of the secondary telescopic joint and arranged on the outer sides of the first floating protection plates; the first floating protection plate and the second floating protection plate can synchronously stretch out along with the telescopic section so as to form a fence structure together with the fixed protection plate for blocking and limiting goods conveyed by the telescopic device, or synchronously retract and are sequentially arranged in a stacked mode in the second direction perpendicular to the first direction. The telescopic conveyor can solve the problem that goods are prone to falling and being damaged in the conveying process due to the fact that no protective device is installed on the fixed section and the telescopic section of the telescopic conveyor.

Description

Technical Field

[0001] This invention relates to the field of telescopic mechanisms, and more specifically to a telescopic device for logistics transportation. Background Technology

[0002] Telescopic conveyors are ordinary conveyors with an added telescopic mechanism, allowing the conveyor to freely extend and retract along its length, enabling real-time control of the conveyor's length. Telescopic conveyors can transport materials in both directions and can be used in conjunction with other conveying equipment and material sorting systems to automate material entry and exit from warehouses or vehicle loading and unloading. They are widely used in various industries.

[0003] Telescopic conveyors typically consist of nested fixed sections and telescopic sections. The telescopic section includes a main telescopic joint and at least one secondary telescopic joint. The secondary telescopic joint can extend and retract along the main telescopic joint, and the main telescopic joint can extend and retract along the fixed section. Traditional telescopic conveyors require nested connections between multiple telescopic joints during retraction. If a guard plate is installed on the top surface of each telescopic joint, it will interfere with and collide with the fixed and telescopic sections as the joint retracts. Therefore, traditional telescopic conveyors do not have guard plates on the top surface of the telescopic section, which makes it easy for goods transported by the conveyor to fall and be damaged from either the fixed or telescopic section. Summary of the Invention

[0004] To overcome the above-mentioned shortcomings, the present invention aims to provide a telescopic device for logistics transportation.

[0005] To achieve the above objectives, the technical solution adopted by the present invention includes: a fixed section; a telescopic section having a main telescopic joint and at least one secondary telescopic joint nested together in a first direction, wherein the main telescopic joint is nested in the fixed section at one end away from the secondary telescopic joint; and a guard plate assembly including a fixed guard plate, a first floating guard plate, and a second floating guard plate, wherein the fixed guard plate is disposed on both sides of the top of the fixed section, the first floating guard plate is disposed on both sides of the top of the main telescopic joint and placed outside the fixed guard plate, and the second floating guard plate is disposed on both sides of the top of the secondary telescopic joint and placed outside the first floating guard plate. The first and second floating guard plates can extend synchronously with the telescopic section to form a barrier structure together with the fixed guard plate to block and limit the goods transported by the telescopic device, or they can retract synchronously and be stacked in sequence along a second direction perpendicular to the first direction.

[0006] In the preferred technical solution of the telescopic device for logistics transportation described above, the top of the fixed guard plate, the first floating guard plate and the second floating guard plate all have a limiting flange formed by bending outwards, and the limiting flanges of the fixed guard plate, the first floating guard plate and the second floating guard plate are sequentially overlapped and nested.

[0007] In the preferred embodiment of the telescopic device for logistics transportation described above, the fixed guard plate, the first floating guard plate and the second floating guard plate have an expansion portion that extends obliquely away from the fixed section from their bottom end toward the top end.

[0008] In the preferred embodiment of the telescopic device for logistics transportation described above, the outer side of the fixed guard plate is provided with a first reinforcing rib, and the outer side of the first floating guard plate is provided with a second reinforcing rib; a first channel is formed between the first reinforcing rib and the fixed guard plate to allow the first floating guard plate to pass through, and a second channel is formed between the second reinforcing rib and the first floating guard plate to allow the second floating guard plate to pass through.

[0009] In the preferred technical solution of the telescopic device for logistics transportation described above, the bottom surface of the first floating guard plate is connected to the main telescopic joint through the first adjusting base, and the bottom surface of the rear end of the first floating guard plate is provided with a first lifting plate that slides in contact with the top surface of the fixed section, so that the first floating guard plate remains horizontal when moving. The bottom surface of the second floating guard plate is connected to the secondary telescopic joint via the second adjusting base. The bottom rear end of the second floating guard plate is provided with a second lifting plate that slides in contact with the top surface of the main telescopic joint, so that the second floating guard plate remains horizontal during movement.

[0010] In the preferred technical solution of the telescopic device for logistics transportation described above, the first lifting plate and the second lifting plate are made of a low coefficient of friction material, or their surfaces are coated with a low coefficient of friction material, so as to reduce the frictional resistance during the movement of the first floating guard plate and the second floating guard plate.

[0011] In the preferred technical solution of the telescopic device for logistics transportation described above, a stop plate is installed in the first gap between the main telescopic joint and the first floating guard plate and the second gap between the secondary telescopic joint and the second floating guard plate by means of a thrust mechanism. When the telescopic section extends, the thrust mechanism can limit the stop plate in the second direction, keeping the stop plate within the first gap and the second gap; when the telescopic section retracts, the thrust mechanism can push the stop plate out of the first gap and the second gap.

[0012] In the preferred technical solution of the telescopic device for logistics transportation described above, the thrust mechanism includes at least two spaced pins fixed to the main telescopic section and the secondary telescopic section, and a guide hole opened on the stop plate. The pin passes through the guide hole. When the telescopic section retracts, the pin slides along the guide hole and applies a thrust to the stop plate to push it out of the first gap or the second gap.

[0013] In the preferred embodiment of the telescopic device for logistics transportation described above, the guide hole includes an inclined portion and a straight portion that are connected to each other; the inclined portion penetrates the stop side surface of the stop plate and is inclined relative to the first direction to form a guide channel for the pin to slide; the straight portion extends along the first direction to form a stop channel that accommodates and limits the pin when the telescopic section extends.

[0014] In the preferred embodiment of the telescopic device for logistics transportation described above, the stop plate is also provided with a mirror hole that is identical in structure to the guide hole and symmetrical to it.

[0015] The beneficial effects of this invention are that by setting the fixed guard plate, the first floating guard plate and the second floating guard plate to be arranged in a step-by-step stacked and synchronously extended and retracted, they form a continuous enclosure structure when unfolded to prevent goods from falling off, and when retracted, they achieve zero-interference storage through the sliding cooperation of the second plate part and the third plate part, which significantly reduces the damage rate of goods and improves loading and unloading efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the telescopic device of the present invention without the protective plate assembly installed; Figure 2 A schematic diagram of the telescopic device of the present invention after the protective plate assembly has been installed; Figure 3 This is a front view of the present invention; Figure 4 This is a schematic diagram of the telescopic device of the present invention without the stop plate installed; Figure 5 This is a schematic diagram showing the connection between the fixed guard plate, the first floating guard plate, and the second floating guard plate. Figure 6 This is a schematic diagram showing the connection between the first adjusting base and the first floating guard plate; Figure 7 Left view of the fixed guard plate, the first floating guard plate and the second floating guard plate after they are connected; Figure 8 Structural diagram of the stop baffle; Figure 9 A schematic diagram showing the stop baffle installed on the main expansion joint; In the diagram: Fixed section 1, telescopic section 2, main telescopic joint 21, secondary telescopic joint 22, fixed guard plate 31, first blocking part 311, first flat part 312, first floating guard plate 32, second blocking part 321, second flat part 322, second floating guard plate 33, third blocking part 331, third flat part 332, limiting flange 4, expansion part 5, first reinforcing rib 6, second reinforcing rib 7, first adjusting base 8, first waist hole 81, second waist hole 82, first lifting plate 9, second adjusting base 10, second lifting plate 11, first gap 12, second gap 13, stop plate 14, guide hole 141, inclined part 1411, straight part 1412, mirror hole 142, pin 15. Detailed Implementation

[0017] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0018] like Figures 1 to 9 As shown, the telescopic device for logistics transportation of the present invention includes: a fixed section 1; a telescopic section 2 having a main telescopic joint 21 and at least one secondary telescopic joint 22 nested together in a first direction, wherein the main telescopic joint 21 is nested in the fixed section 1 at the end away from the secondary telescopic joint 22; and a guard plate assembly including a fixed guard plate 31, a first floating guard plate 32, and a second floating guard plate 33. The fixed guard plate 31 is disposed on both sides of the top of the fixed section 1, the first floating guard plate 32 is disposed on both sides of the top of the main telescopic joint 21 and placed outside the fixed guard plate 31, and the second floating guard plate 33 is disposed on both sides of the top of the secondary telescopic joint 22 and placed outside the first floating guard plate 32. The first floating guard plate 32 and the second floating guard plate 33 can extend synchronously with the telescopic section 2 to form a barrier structure with the fixed guard plate 31 to block and limit the goods transported by the telescopic device, or retract synchronously and be stacked in a second direction perpendicular to the first direction.

[0019] It should be noted that in the existing technology, telescopic conveyors generally consist of a fixed section, a telescopic section, a telescopic drive structure, and a conveying structure. The fixed section is the fixed body part of the telescopic conveyor, the telescopic section is composed of several telescopic joints, and the telescopic drive structure can drive several telescopic joints to extend or retract synchronously into the fixed section, thereby realizing the adjustment of the conveying length of the telescopic conveyor.

[0020] To facilitate a detailed explanation of the embodiments of the present invention, the movement direction of the telescopic segment 2 is designated as the first direction, and the width direction of the fixed segment 1, which is perpendicular to the first direction, is designated as the second direction. Furthermore, the extension direction of the telescopic segment 2 is designated as the orientation "forward," and the retraction direction of the telescopic segment 2 is designated as the orientation "rear." The fixed segment 1, the main telescopic joint 21, and the secondary telescopic joint 22 are arranged sequentially from back to front in the first direction, with the rear end of the main telescopic joint 21 nested within the front end of the fixed segment 1, and the rear end of the secondary telescopic joint 22 nested within the front end of the main telescopic joint 21. This allows the main telescopic joint 21 to telescopically move relative to the fixed segment 1, and the secondary telescopic joint 22 to telescopically move relative to the main telescopic joint 21.

[0021] See Figures 1 to 3 In the telescopic device of this application, the telescopic joint that can be nested into the fixed section 1 is set as the main telescopic joint 21, and the remaining telescopic joints are set as secondary telescopic joints 22. The number of secondary telescopic joints 22 can be one, two or other possible numbers. The relationship between the main telescopic joint 21 and the several secondary telescopic joints 22 is restricted to being arranged in a nested manner from back to front along the first direction.

[0022] Traditional telescopic conveyors require multiple telescopic sections to be completely nested when retracted. If a guard plate is installed on the top surface of each telescopic section, the guard plate will interfere with and collide with the fixed section 1 and the telescopic section 2 when the telescopic section retracts. As a result, the fixed section 1 and the telescopic section 2 of traditional telescopic conveyors are not equipped with guard plates. This causes goods to fall and be damaged when transported by the telescopic conveyor belt because there is no protection on both sides.

[0023] In the telescopic device of this application, a fixed guard plate 31 is installed on both sides of the top surface of the fixed section 1 along the second direction by locking bolts; a first floating guard plate 32 is installed on both sides of the main telescopic section 21 along the second direction; and a second floating guard plate 33 is installed on both sides of the secondary telescopic section 22 along the second direction. In the second direction, the first floating guard plate 32 is located outside the fixed guard plate 31, and the second floating guard plate 33 is located outside the first floating guard plate 32. Each of the fixed guard plate 31, the first floating guard plate 32, and the second floating guard plate 33 has a blocking portion extending in the vertical direction and a flat plate portion extending along the second direction at its bottom end. To facilitate a detailed description of the blocking portion and flat plate portion of each guard plate in this invention, the blocking portions of the fixed guard plate 31, the first floating guard plate 32, and the second floating guard plate 33 are sequentially named the first blocking portion 311, the second blocking portion 321, and the third blocking portion 331, and the flat plate portions are sequentially named the first flat plate portion 312, the second flat plate portion 322, and the third flat plate portion 332.

[0024] It should be noted that the bottom height of the first floating guard plate 32 is configured to be higher than the first flat plate portion 312, and the bottom height of the second floating guard plate 33 is configured to be higher than the second flat plate portion 322. The bottom heights of the fixed guard plate 31, the first floating guard plate 32, and the second floating guard plate 33 increase step by step, and the dimensions of the fixed guard plate 31, the first floating guard plate 32, and the second floating guard plate 33 decrease step by step.

[0025] When the telescopic section 2 does not extend beyond the fixed section 1, the main telescopic section 21 is nested inside the fixed section 1, and the secondary telescopic section 22 is nested inside the main telescopic section 21. Correspondingly, the fixed guard plate 31, the first floating guard plate 32, and the second floating guard plate 33 are stacked in the second direction and the front ends of each guard plate are close to each other.

[0026] When the telescopic section 2 extends beyond the fixed section 1, the main telescopic joint 21 and the secondary telescopic joint 22 extend in stages. The main telescopic joint 21 drives the first floating guard plate 32 to move forward in the first direction, and the secondary telescopic joint 22 drives the second floating guard plate 33 to move forward in the first direction. After the telescopic section 2 moves into place, the fixed guard plate 31, the first floating guard plate 32 and the second floating guard plate 33 form a barrier structure. When the conveyor belt of the telescopic machine transports goods, the barrier structure extending along the first direction can protect the goods, thereby reducing or even avoiding the problem of goods falling and being damaged, reducing the damage rate of goods during loading and unloading, and increasing the market share of the telescopic device of the present invention.

[0027] When the telescopic section 2 retracts to the fixed section 1, the main telescopic joint 21 drives the first floating guard plate 32 to move backward in the first direction, so that the second flat plate portion 322 of the first floating guard plate 32 slides on the first flat plate portion 312 of the fixed guard plate 31. The secondary telescopic joint 22 drives the second floating guard plate 33 to move backward in the first direction, so that the third flat plate portion 332 of the second floating guard plate 33 slides on the second flat plate portion 322 of the first floating guard plate 32. This achieves a hierarchical arrangement of the fixed guard plate 31, the first floating guard plate 32, and the second floating guard plate 33 in the second direction. This arrangement ensures that the first floating guard plate 32 and the second floating guard plate 33 can retract with the main telescopic joint 21 and the secondary telescopic joint 22 respectively without interfering with or colliding with the fixed section 1 or the telescopic section 2.

[0028] In one or more embodiments, the top of the fixed guard plate 31, the first floating guard plate 32 and the second floating guard plate 33 are all provided with a limiting flange 4 formed by bending outwards, and the limiting flanges 4 of the fixed guard plate 31, the first floating guard plate 32 and the second floating guard plate 33 are sequentially overlapped and nested.

[0029] See Figures 5 to 7The limiting flange 4 formed by bending the top of each guard plate outward along the second direction is similar to the bending structure of a fishhook. Since the bottom of the fixed guard plate 31, the first floating guard plate 32, and the second floating guard plate 33 are raised step by step in the vertical direction and the top of the guard plate is reduced step by step, the limiting flange 4 of the fixed guard plate 31, the first floating guard plate 32, and the second floating guard plate 33 can be nested and connected in sequence. When each guard plate is stacked outward in the second direction, the limiting flange 4 of each guard plate can limit each other in the second direction, thereby avoiding the problem of tilting and bending outward in the second direction when each guard plate is telescopic. This ensures the stability of the movement of each guard plate. At the same time, this setting can improve the strength of the guard plates in blocking the cargo and reduce the phenomenon of the individually set fixed guard plate 31, the first floating guard plate 32, or the second floating guard plate 33 tilting due to the impact of the cargo.

[0030] In one or more embodiments, the fixed guard plate 31, the first floating guard plate 32 and the second floating guard plate 33 have an expansion portion 5 extending obliquely away from the fixed section 1 from their bottom end toward the top end.

[0031] See Figure 7 Each guard plate has an expansion section 5 that bends and extends outward in a second direction. With this arrangement, when the conveyor belt of the telescopic machine transports goods, each guard plate will not obstruct or block the transmission of goods.

[0032] In one or more embodiments, a first reinforcing rib 6 is provided on the outer side of the fixed guard plate 31, and a second reinforcing rib 7 is provided on the outer side of the first floating guard plate 32; a first channel is formed between the first reinforcing rib 6 and the fixed guard plate 31 to allow the first floating guard plate 32 to pass through, and a second channel is formed between the second reinforcing rib 7 and the first floating guard plate 32 to allow the second floating guard plate 33 to pass through.

[0033] See Figures 5 to 7 The two ends of the first reinforcing rib 6 are connected to the top of the fixed guard plate 31 and the first flat plate portion 312, respectively. The two ends of the second reinforcing rib 7 are connected to the top of the first floating guard plate 32 and the second flat plate portion 322, respectively. The shapes of the first reinforcing rib 6 and the second reinforcing rib 7 are approximately in the shape of a "<". Alternatively, the shapes of the first reinforcing rib 6 and the second reinforcing rib 7 can also be in a straight line, without any specific limitation. This arrangement can enhance the fixing strength of the fixed guard plate 31, the first floating guard plate 32, and the second floating guard plate 33 in the second direction, reduce the possibility of deformation of each guard plate due to the compression of goods, and improve the service life of each guard plate.

[0034] See Figures 5 to 7A first channel for the movement of the first floating guard plate 32 is formed between the first reinforcing rib 6 and the first blocking portion 311 of the fixed guard plate 31, and a second channel for the movement of the second floating guard plate 33 is formed between the second reinforcing rib 7 and the second blocking portion 321 of the first floating guard plate 32. This arrangement allows the first floating guard plate 32 to be further confined within the first channel by the first reinforcing rib 6, and the second floating guard plate 33 to be confined within the second channel by the second reinforcing rib 7, thereby further improving the connection strength of each guard plate in the second direction.

[0035] In one or more embodiments, the bottom surface of the first floating guard plate 32 is connected to the main telescopic joint 21 via the first adjusting base 8, and the bottom surface of the rear end of the first floating guard plate 32 is provided with a first lifting plate 9 that slides in contact with the top surface of the fixed section 1 so that the first floating guard plate 32 remains horizontal during movement; the bottom surface of the second floating guard plate 33 is connected to the secondary telescopic joint 22 via the second adjusting base 10, and the bottom surface of the rear end of the second floating guard plate 33 is provided with a second lifting plate 11 that slides in contact with the top surface of the main telescopic joint 21 so that the second floating guard plate 33 remains horizontal during movement.

[0036] See Figure 5 , Figure 6 The front end of the main telescopic joint 21 is provided with a first adjusting base 8. The top of the first adjusting base 8 is connected to the bottom surface of the second flat plate portion 322 of the first floating guard plate 32, which is used to raise the height of the front end of the first floating guard plate 32. The bottom surface of the second flat plate portion 322 at the rear end of the first floating guard plate 32 is provided with a first lifting plate 9. When the first floating guard plate 32 is placed on the side of the fixed guard plate 31, the rear end of the first floating guard plate 32 slides in contact with the top surface of the first flat plate portion 312 of the fixed guard plate 31 through the first lifting plate 9.

[0037] See Figures 2 to 6 The front end of the secondary telescopic joint 22 is provided with a second adjustment base 10. The top of the second adjustment base 10 is connected to the bottom surface of the third flat plate portion 332 of the second floating guard plate 33, which is used to raise the height of the front end of the second floating guard plate 33. The bottom surface of the third flat plate portion 332 at the rear end of the second floating guard plate 33 is provided with a second lifting plate 11, so that when the second floating guard plate 33 is placed on the side of the first floating guard plate 32, the rear end of the second floating guard plate 33 slides in contact with the top surface of the second flat plate portion 322 of the first floating guard plate 32 through the second lifting plate 11.

[0038] It should be noted that the first adjusting base 8 and the second adjusting base 10 have the same structure. The only difference between them is their different positions, lifting components, and heights. The following description uses the first adjusting base 8 as an example: The first adjusting base 8 has a horizontal part and a vertical part that are perpendicular to each other. The horizontal part has a through first waist hole 81 along the second direction, and the vertical part has a through second waist hole 82 along the vertical direction. A bolt threaded into the first waist hole 81 is threaded onto the main telescopic joint 21, allowing the first adjusting base 8 to be adjusted in position along the second direction on the main telescopic joint 21. A pin is threaded into the second waist hole 82, and the bottom surface of the front end of the second flat plate part 322 is penetrated by the pin. The bottom surface of the second flat plate part 322 can be connected to the horizontal part of the first adjusting base 8 through an elastic element, which can be a spring. This configuration allows for positional adjustment of the first floating guard plate 32 in the second direction. Simultaneously, the second flat plate 322 is bolted into the second waist hole 82 of the vertical portion and connected to the horizontal portion via an elastic element, thereby enabling adaptive adjustment of the front end height of the first floating guard plate 32 to meet usage requirements under different conditions. In other possible embodiments, the second flat plate 322 is locked and fixed to the vertical portion of the first adjusting base 8 by bolts passing through the second waist hole 82; this configuration allows for fixing the front end height of the first floating guard plate 32, improving the stability of the first floating guard plate 32 during its telescopic movement.

[0039] In one or more embodiments, the first lifting plate 9 and the second lifting plate 11 are made of a low-friction coefficient material, or their surfaces are coated with a low-friction coefficient material, in order to reduce the frictional resistance during the movement of the first floating guard plate 32 and the second floating guard plate 33; the low-friction coefficient material can be PTFE, and there are no specific limitations, it can be selected according to the actual production needs.

[0040] Understandably, the first floating guard plate 32 slides on the first flat plate portion 312 of the fixed guard plate 31 by means of the first lifting plate 9, and the second floating guard plate 33 slides on the second flat plate portion 322 of the first floating guard plate 32 by means of the second lifting plate 11. This can significantly reduce the frictional contact surface between the first floating guard plate 32 and the fixed guard plate 31, as well as the frictional contact surface between the second floating guard plate 33 and the first floating guard plate 32. In addition, by performing special treatment on the first lifting plate 9 and the second lifting plate 11, the frictional resistance during the movement of the first floating guard plate 32 and the second floating guard plate 33 can be further reduced, improving the smoothness of each guard plate during telescopic movement and reducing the generation of abnormal noise.

[0041] It should be noted that, since the top heights of the fixed section 1, the main telescopic section 21, and the secondary telescopic section 22 decrease progressively in the vertical direction, and the bottom heights of the fixed guard plate 31, the first floating guard plate 32, and the second floating guard plate 33 increase progressively in the vertical direction, there will be a first gap 12 between the main telescopic section 21 and the first floating guard plate 32, and a second gap 13 between the secondary telescopic section 22 and the second floating guard plate 33. The size of the second gap 13 is larger than that of the first gap 12. In order to prevent the transported goods from falling and being damaged through the first gap 12 or the second gap 13, a stop plate 14 adapted to the size of the first gap 12 and the second gap 13 is required to block them.

[0042] Furthermore, to prevent the stop plate 14 from falling off when obstructing goods, or from interfering with or colliding with the fixed section 1 or the telescopic section 2 when the telescopic section retracts, the present invention installs the stop plate 14 within the first gap 12 and the second gap 13 by means of a thrust mechanism. When the telescopic section 2 extends, the thrust mechanism can limit the stop plate 14 in the second direction, keeping the stop plate 14 within the first gap 12 and the second gap 13. When the telescopic section 2 retracts, the thrust mechanism can push the stop plate 14 out of the first gap 12 and the second gap 13.

[0043] In one specific embodiment of the thrust-stopping mechanism, the thrust-stopping mechanism includes at least two spaced pins 15 fixed on the main telescopic joint 21 and the secondary telescopic joint 22, and at least two guide holes 141 opened on each stop plate 14; the pins 15 can pass through the guide holes 141, and when the telescopic section 2 retracts, the pins 15 slide along the guide holes 141 and apply a thrust to the stop plate 14 to push it out of the first gap 12 or the second gap 13.

[0044] See Figure 4 , Figure 8 , Figure 9 When the main telescopic joint 21 and the secondary telescopic joint 22 extend to transport goods, the first gap 12 between the main telescopic joint 21 and the first floating guard plate 32, and the second gap 13 between the secondary telescopic joint 22 and the second floating guard plate 33 are exposed. At this time, the workers place the corresponding number of stop plates 14 in the first gap 12 and the second gap 13, and make the pins 15 at the corresponding positions enter the guide holes 141 of the stop plates 14. Each stop plate 14 is limited by at least two pins 15, thereby ensuring the fixing effect of the stop plates 14. When the main telescopic joint 21 and the secondary telescopic joint 22 retract, the pins 15 that move with it can slide along the guide holes 141 to apply a pushing force to the stop plates 14, thereby pushing the stop plates 14 out of the first gap 12 or the second gap 13, realizing the automatic unloading of the stop plates 14 and reducing the process of manual intervention.

[0045] In one or more embodiments, the guide hole 141 includes an inclined portion 1411 and a straight portion 1412 that are connected to each other; the inclined portion 1411 extends through the stop side surface of the stop plate 14 and is inclined relative to a first direction to form a guide channel for sliding of the pin 15; the straight portion 1412 extends along the first direction to form a stop channel that accommodates and limits the pin 15 when the telescopic section 2 is extended.

[0046] See Figure 3 , Figure 8 , Figure 9 When the main telescopic joint 21 and the secondary telescopic joint 22 extend to expose the first gap 12 and the second gap 13, the workers can place the corresponding number and size of stop plates 14 into the first gap 12 and the second gap 13, and let the pin 15 enter through the through guide channel. Then, control the stop plate 14 to move backward so that the pin 15 enters the stop channel and is limited. By restricting the two pins 15 into the straight part 1412 of the two guide holes 141 respectively, the fixing strength of the stop plate 14 in the second direction can be effectively improved, thereby ensuring the stopping effect of the stop plate 14 on the goods.

[0047] See Figure 3 , Figure 8 , Figure 9 When the main telescopic joint 21 retracts, the pin 15 moves backward in the first direction. When the pin 15 moves through the guide hole 141 to the guide channel and the rear end of the stop plate 14 abuts against the front end of the fixed section 1, the pin 15 will press against the inner wall of the guide channel and apply a pushing force to the stop plate 14, so as to gradually push the stop plate 14 out of the first gap 12, realizing the automatic unloading of the stop plate 14 in the first gap 12. Correspondingly, when the secondary telescopic joint 22 retracts, the stop plate 14 in the second gap 13 will be pushed out in the same way.

[0048] In one or more embodiments, the stop plate 14 is further provided with a mirror hole 142 that has the same structure as the guide hole 141 and is symmetrical to it. See also Figure 8 , Figure 9 Each set of guide holes 141 and mirror holes 142 are roughly in the shape of an "eight" on the stop plate 14. With this arrangement, when the stop plate 14 is placed in the forward direction, the pin 15 can enter the guide hole 141, and when the stop plate 14 is placed in the reverse direction, the pin 15 can enter the mirror hole 142, which makes it convenient for the staff to place the stop plate 14 in the first gap 12 and the second gap 13.

[0049] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A telescopic device for logistics transportation, characterized in that, include: Fixed section; The telescopic section has a main telescopic joint and at least one secondary telescopic joint that are nested together in a first direction, wherein the main telescopic joint is nested in the fixed section at an end away from the secondary telescopic joint; The guard plate assembly includes a fixed guard plate, a first floating guard plate, and a second floating guard plate. The fixed guard plate is located on both sides of the top of the fixed section. The first floating guard plate is located on both sides of the top of the main expansion joint and is placed outside the fixed guard plate. The second floating guard plate is located on both sides of the top of the secondary expansion joint and is placed outside the first floating guard plate. The first and second floating guard plates can extend synchronously with the telescopic section to form a barrier structure together with the fixed guard plate to block and limit the goods transported by the telescopic device, or they can retract synchronously and be stacked in sequence along a second direction perpendicular to the first direction.

2. The telescopic device for logistics transportation according to claim 1, characterized in that: The top of the fixed guard plate, the first floating guard plate and the second floating guard plate all have a limiting flange formed by bending outwards, and the limiting flanges of the fixed guard plate, the first floating guard plate and the second floating guard plate are sequentially overlapped and nested.

3. The telescopic device for logistics transportation according to claim 2, characterized in that: The fixed guard plate, the first floating guard plate, and the second floating guard plate have an expansion portion extending obliquely away from the fixed section from their bottom end toward the top end.

4. The telescopic device for logistics transportation according to claim 3, characterized in that: The fixed guard plate is provided with a first reinforcing rib on its outer side, and the first floating guard plate is provided with a second reinforcing rib on its outer side; a first channel is formed between the first reinforcing rib and the fixed guard plate to allow the first floating guard plate to pass through, and a second channel is formed between the second reinforcing rib and the first floating guard plate to allow the second floating guard plate to pass through.

5. The telescopic device for logistics transportation according to claim 1, characterized in that: The bottom surface of the first floating guard plate is connected to the main telescopic joint through the first adjusting base. The bottom surface of the rear end of the first floating guard plate is provided with a first lifting plate that slides in contact with the top surface of the fixed section, so that the first floating guard plate remains horizontal when moving. The bottom surface of the second floating guard plate is connected to the secondary telescopic joint via the second adjusting base. The bottom rear end of the second floating guard plate is provided with a second lifting plate that slides in contact with the top surface of the main telescopic joint, so that the second floating guard plate remains horizontal during movement.

6. The telescopic device for logistics transportation according to claim 5, characterized in that: The first and second lifting plates are made of a low-friction coefficient material or have a low-friction coefficient material coated on their surfaces to reduce the frictional resistance during the movement of the first and second floating guard plates.

7. The telescopic device for logistics transportation according to claim 1, characterized in that: Both the first gap between the main expansion joint and the first floating guard plate and the second gap between the secondary expansion joint and the second floating guard plate are equipped with stop plates by means of a thrust mechanism. When the telescopic section extends, the thrust mechanism can limit the stop plate in the second direction, keeping the stop plate within the first gap and the second gap; when the telescopic section retracts, the thrust mechanism can push the stop plate out of the first gap and the second gap.

8. The telescopic device for logistics transportation according to claim 7, characterized in that: The thrust-stopping mechanism includes at least two spaced-apart pins fixed to the main telescopic joint and the secondary telescopic joint, and a guide hole opened on the stop plate. The pin passes through the guide hole. When the telescopic section retracts, the pin slides along the guide hole and applies a thrust to the stop plate to push it out of the first gap or the second gap.

9. The telescopic device for logistics transportation according to claim 8, characterized in that: The guide hole includes an inclined portion and a straight portion that are connected to each other; the inclined portion passes through the stop side surface of the stop plate and is inclined relative to the first direction to form a guide channel for the pin to slide; the straight portion extends along the first direction to form a stop channel that accommodates and limits the pin when the telescopic section is extended.

10. The telescopic device for logistics transportation according to claim 8 or 9, characterized in that: The stop plate is also provided with mirror holes that are identical in structure to the guide holes and symmetrical to each other.

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