A loading and unloading device for construction sites

Abstract

The application discloses a loading and unloading device of a construction site construction auxiliary device, which comprises a fixed plate, two supporting plates are slidably connected to the fixed plate, a supporting group, a driving group and a detecting group are arranged on the two supporting plates, the supporting group comprises two placing groups, when the bricks are unloaded, the pre-supporting is carried out through the base plate pushed out from the bottom groove to the gusset plate, then the base plate is pushed to the top of the brick by the conveying of the first chain, and then the brick is lowered, when the lowermost base plate contacts the ground, the other base plates and the brick are blocked, and then the base plates are separated from the placing pieces on the side of the base plates one by one, and the unloading and stacking are completed one by one, and the stacking mode is more stable, and the position deviation between the bricks does not occur during the unloading, and the bricks can be quickly unloaded.

Description

Technical Field

[0001] This invention relates to the field of auxiliary devices for construction sites, specifically a loading and unloading device for construction sites. Background Technology

[0002] During construction, floor tiles need to be laid on the ground. Before laying, the tiles need to be transported to the construction site and unloaded. In practice, loading and unloading are mostly done by trolleys or manual labor. Whether by trolley or manual labor, most of the work is still done manually, requiring multiple unloadings, which is labor-intensive. There are generally three methods for placing the tiles:

[0003] Laying the bricks one by one on the ground outside the designated paving area makes them difficult to handle and spreads over a wide area. They are also prone to being crushed by the solid objects underneath if workers accidentally step on them. It would be more efficient to clean up all the debris in the paving area directly.

[0004] Place the two sides of the brick on the ground and the wall respectively, so that the brick and the corner of the wall form a triangle. However, the brick is prone to slipping and breaking in this way.

[0005] Place the pads on the ground, and then stack the bricks and pads intermittently to complete the placement. This method takes up the least area and is safer and easier to handle than the previous two methods. However, when placing the bricks, you need to pay attention to the position of the pads and bricks to avoid the side of the bricks protruding too far outward, which would affect the stability. However, this method takes a long time to stack, as you need to remove the bricks one by one and then place them one by one.

[0006] In summary, existing construction site loading and unloading equipment cannot directly unload multiple bricks after they have been transported to the laying site, nor can it directly stack the pads and bricks after unloading.

[0007] Based on this, the present invention designs a loading and unloading device for construction sites to solve the above problems. Summary of the Invention

[0008] The purpose of this invention is to provide a loading and unloading device for construction sites to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a loading and unloading device for construction sites, comprising a fixed plate, wherein two support plates are slidably connected to the fixed plate, and each of the two support plates is provided with a support group, a drive group and a detection group, wherein the support group includes two placement groups;

[0010] The placement assembly includes a first chain, two drive rollers, several strip grooves, and a bottom groove. The two drive rollers are rotatably connected to the side wall of the support plate. The first chain is driven and connected to the two drive rollers. Several fixing blocks are fixedly connected to the first chain. Slider blocks are provided on the fixing blocks. Each slider is rotatably connected to a placement piece. The placement piece is used to place bricks. A torsion spring is sleeved on the rotation shaft of the placement piece. The placement piece can only rotate upwards. The bottom groove is opened near the bottom of the support plate. Several strip grooves are located above the bottom groove and are evenly distributed. Pads are provided inside the strip grooves and the bottom groove. Push plates and top plates are respectively provided on the left side of several strip grooves and the left side of the bottom groove. A receiving plate is provided on the right side of the bottom groove. The receiving plate is slidably connected to the right side wall of the support plate. A first spring is fixedly connected between the receiving plate and the support plate.

[0011] The drive group is used to drive the transmission roller to rotate and the two support plates to slide along the fixed plate, and to drive the push plate to push the pad inside the strip groove to the top of the brick. The detection group is used to determine the number of pads pushed out of the strip groove based on the number of bricks placed.

[0012] As a further embodiment of the present invention, the detection group includes baffles corresponding to the number of strip grooves and second racks and support rods corresponding to the number of fixed blocks. Each support rod is located on one side of the second rack, and the top of each support rod is rotatably connected to the second rack on one side. The baffles are located on the right side of the strip grooves and are used to block the strip grooves. Each baffle is slidably connected to a support plate. A second spring is fixedly connected between each baffle and the inner wall of the support plate. A first rack is fixedly connected to the end of each baffle, and the first rack meshes with a first gear.

[0013] The second rack rods are all slidably connected to limit grooves, and the limit grooves are all opened on the fixed blocks on one side. The sliders are all slidably connected to the fixed blocks. A third spring is fixedly connected between the bottom wall of the slider and the fixed block. The bottom end of the support rod is rotatably connected to the side wall of the slider. The second rack rods are all located to the right of the first gear and do not mesh with the first gear. When the brick is placed on the placement plate, the weight of the brick presses down on the slider, thereby causing the support rod to push the second rack rod to slide along the limit groove to a position where it can mesh with the first gear.

[0014] As a further embodiment of the present invention, the ends of the placement pieces are all L-shaped.

[0015] As a further embodiment of the present invention, the pads are all T-shaped, the bottom groove and the top plate are both T-shaped, the connecting plate can contact the notch at the bottom of the pad and the thickness of the connecting plate is small.

[0016] As a further embodiment of the present invention, the support plate has a channel inside, which extends sequentially from the top of the support plate to the bottom groove and communicates with the strip groove and the bottom groove.

[0017] As a further aspect of the present invention, the drive group includes a separation group and a transmission group;

[0018] The transmission assembly includes two servo motors, both of which are fixedly connected to the support plate. The rotation shafts of the servo motors are connected to the top transmission rollers in the two placement assemblies by a second chain.

[0019] The separation assembly is used to drive the two support plates to slide along the fixed plate.

[0020] As a further embodiment of the present invention, the separation assembly includes a vertical plate located on one side of the support plate. Each vertical plate is fixedly connected to a sliding rod, and each sliding rod is slidably connected to a plurality of push plates. A fourth spring is fixedly connected between each sliding rod and a push plate, and the sliding rod is fixedly connected to a top plate.

[0021] The vertical plate is fixedly connected to a first connecting rod, which is slidably connected to a fixed plate. A cylinder is fixedly connected between the first connecting rod and the fixed plate. A second connecting rod is fixedly connected to the support plate, which is slidably connected to the fixed plate. A fifth spring is fixedly connected between the fixed plate and the second connecting rod.

[0022] As a further embodiment of the present invention, the fixed plate is fixedly connected to a push handle, and both the fixed plate and the support plate are fixedly connected to casters at their bottom ends.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] When unloading bricks, a pad is pushed out from inside the bottom groove onto the receiving plate for pre-support. Then, as the first chain conveys the bricks, the pad is pushed to the top of the bricks and follows the bricks as they descend. Once the bottom pad contacts the ground, the other pads and bricks are blocked and will detach from the placement plate on one side one by one, thus completing the unloading and stacking of each brick. This stacking method is more stable, and there will be no positional deviation between bricks during the unloading process, and the unloading can be done quickly.

[0025] The detection group can perform the detection, ensuring that only when a brick is placed on the placement plate and the slider is pressed down, causing the second rack rod to move to a position where it can mesh with the first gear during the descent, can the baffle plate release its obstruction of the slot. This prevents the pad from appearing inside the slot on one side of the placement plate when it is descending without a brick, thus avoiding errors. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a side view of the fixing plate of the present invention;

[0028] Figure 3 This is a side view of the support plate and baffle of the present invention;

[0029] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0030] Figure 5 The positions of the second rack rod relative to the first gear are before and after the slider of the present invention descends;

[0031] Figure 6 This is a schematic diagram showing the connection relationship between the first chain, the transmission roller, and the fixing block of the present invention;

[0032] Figure 7 This is a schematic diagram showing the positional relationship between the fixing block, the placement piece, and the slider of the present invention;

[0033] Figure 8 This is a schematic diagram showing the positional relationship between the slider, the support rod, and the second rack rod of the present invention;

[0034] Figure 9 This is a side view of the support plate and baffle, as well as the first connecting rod and the second connecting rod of the present invention.

[0035] Figure 10 for Figure 9 A magnified view of a section at point B in the middle;

[0036] Figure 11 for Figure 9 A magnified view of a section at point C;

[0037] Figure 12 This is a schematic diagram showing the positional relationship between the push plate, the strip groove, and the channel of the present invention;

[0038] Figure 13 for Figure 12 A magnified view of a section at point D;

[0039] Figure 14 This is a schematic diagram of the push plate and the pad plate of the present invention;

[0040] Figure 15 This is a schematic diagram of the top plate and push plate of the present invention;

[0041] Figure 16 This is a schematic diagram of the stacking of bricks after the connecting plate and the pad plate of the present invention come into contact;

[0042] Figure 17 for Figure 16 A magnified view of a section at point E in the middle.

[0043] The attached diagram lists the components represented by each number as follows:

[0044] 1. Fixed plate; 2. Support plate; 3. First chain; 4. Fixed block; 5. Transmission roller; 6. Slider; 7. Placement plate; 8. Torsion spring; 9. Strip groove; 10. Bottom groove; 11. Pad plate; 12. Push plate; 13. Connecting plate; 14. First spring; 15. Baffle plate; 16. Second spring; 17. First rack; 18. First gear; 19. Second rack; 20. Limiting groove; 21. Support rod; 22. Third spring; 23. Channel; 24. Servo motor; 25. Second chain; 26. Vertical plate; 27. Slide rod; 28. Fourth spring; 29. ​​First connecting rod; 30. Cylinder; 31. Second connecting rod; 32. Fifth spring; 33. Top plate; 34. Universal wheel. Detailed Implementation

[0045] Please see Figure 1-17 The present invention provides a technical solution: a loading and unloading device for construction site, including a fixed plate 1, on which two support plates 2 are slidably connected, and each of the two support plates 2 is provided with a support group, a drive group and a detection group, and the support group includes two placement groups;

[0046] The placement assembly includes a first chain 3, two drive rollers 5, several strip grooves 9, and a bottom groove 10. The two drive rollers 5 are rotatably connected to the side wall of the support plate 2. The first chain 3 is drivenly connected to the two drive rollers 5. Several fixing blocks 4 are fixedly connected to the first chain 3. Slider blocks 6 are provided on the fixing blocks 4. Each slider 6 is rotatably connected to a placement piece 7. The placement piece 7 is used to place bricks. A torsion spring 8 is sleeved on the rotating shaft of the placement piece 7. The placement piece 7 can only move towards... The bottom groove 10 is located near the bottom of the support plate 2. Several strip grooves 9 are located above the bottom groove 10 and are evenly distributed. A pad 11 is provided inside both the strip groove 9 and the bottom groove 10. A push plate 12 and a top plate 33 are respectively provided on the left side of the strip groove 9 and the left side of the bottom groove 10. A connecting plate 13 is provided on the right side of the bottom groove 10. The connecting plate 13 is slidably connected to the right side wall of the support plate 2. A first spring 14 is fixedly connected between the connecting plate 13 and the support plate 2.

[0047] The drive group is used to drive the transmission roller 5 to rotate and the two support plates 2 to slide along the fixed plate 1, and to drive the push plate 12 to push the pad 11 inside the strip groove 9 to the top of the brick. The detection group is used to determine the number of pads 11 pushed out of the strip groove 9 according to the number of bricks placed.

[0048] As a further embodiment of the present invention, the detection group includes baffles 15 corresponding one-to-one with the number of strip grooves 9, and second rack rods 19 and support rods 21 corresponding one-to-one with the number of fixed blocks 4. Each support rod 21 is located on one side of the second rack rod 19, and the top of each support rod 21 is rotatably connected to the second rack rod 19 on one side. The baffles 15 are located on the right side of the strip grooves 9 and are used to block the strip grooves 9. Each baffle 15 is slidably connected to the support plate 2. A second spring 16 is fixedly connected between each baffle 15 and the inner wall of the support plate 2. Each end of each baffle 15 is fixedly connected to a first rack rod 17, and each first rack rod 17 is meshed with a first gear 18.

[0049] The second rack rod 19 is slidably connected to the limiting groove 20. The limiting groove 20 is opened on the fixing block 4 on one side. The slider 6 is slidably connected to the fixing block 4. The bottom wall of the slider 6 is fixedly connected to the fixing block 4. The bottom end of the support rod 21 is rotatably connected to the side wall of the slider 6. The second rack rod 19 is located to the right of the first gear 18 and does not mesh with the first gear 18. When the brick is placed on the placement piece 7, the weight of the brick presses down on the slider 6, thereby causing the support rod 21 to push the second rack rod 19 to slide along the limiting groove 20 to a position where it can mesh with the first gear 18.

[0050] As a further embodiment of the present invention, the ends of the placement pieces 7 are all L-shaped.

[0051] As a further embodiment of the present invention, the pads 11 are all T-shaped, the bottom groove 10 and the top plate 33 are both T-shaped, the connecting plate 13 can contact the notch at the bottom of the pad 11 and the thickness of the connecting plate 13 is small.

[0052] like Figure 1-17 :

[0053] Placement of bricks:

[0054] Before the bricks are placed, the drive assembly first pushes the push plate 12 and top plate 33 from one side of the strip groove 9 and bottom groove 10, pushing the pad 11 inside the strip groove 9 towards the bricks. However, at this time, the baffle 15 is on the right side of the strip groove 9 and partially closes it. Therefore, the pad 11 inside the strip groove 9 cannot be pushed out by the push plate 12 due to the obstruction of the baffle 15. However, the push plate 12 will continue to push the pad 11. The pad 11 inside the bottom groove 10 does not have the baffle 15 on one side. Therefore, the pad 11 inside the bottom groove 10 will be pushed out of the bottom groove 10 and onto the receiving plate 13 by the push of the top plate 33. Both the pad 11 and the bottom groove 10 are T-shaped. After the pad 11 is pushed onto the receiving plate 13, the height of its bottom end is higher than the height of the bottom end of the receiving plate 13. Figures 16-17 ;

[0055] Before the brick is placed on the placement plate 7, all the placement plates 7 are tilted upwards under the action of the torsion spring 8, and the third spring 22 is not compressed at this time. The second rack rod 19 is located above and to the right of the first gear 18. After the brick is placed on the adjacent placement plates 7 on the left and right sides, the weight of the brick will press down on the placement plates 7. At this time, the placement plate 7 will drive the slider 6 to slide down along the fixed block 4. During the descent, it will push the second rack rod 19 to slide along the limiting groove 20 through the support rod 21. At this time, the second rack rod 19 will move from its original position. Figure 5 Move position a to position b, and then place multiple bricks in sequence. The L-shaped placement piece 7 can restrict the bricks from both the front and rear ends to prevent the bricks from falling when the fixed plate 1 and the support plate 2 move. Then the entire device can be moved to the position where it needs to be removed.

[0056] Removing the bricks:

[0057] When unloading the bricks, the drive assembly first rotates the transmission roller 5. At this time, the first chain 3 will transport the fixing block 4 and the bricks downwards, but the pad 11 on the receiving plate 13 will not move downwards. At this time, all the bricks will also move downwards. During the movement, the second rack 19 will mesh with the first gear 18 and drive the first rack 17 and the baffle 15 to slide upwards along the support plate 2 through the first gear 18. At this time, the second spring 16 will be compressed, and the baffle 15 will rise relative to the strip groove 9. After the baffle 15 rises to a position higher than the strip groove 9, the pushing action of the push plate 12 will be applied to the pad inside the strip groove 9. The plate 11 is conveyed towards the brick, but it is not directly conveyed onto the brick. Instead, it is first placed against the brick. At this time, the plate 11 will be below the baffle 15 and will block the baffle 15 to a certain extent. Since the brick is lowered from above, and the second rack rod 19 contacts the first gear 18 first, after the second rack rod 19 disengages from the first gear 18, the top of the brick moves to the position below the plate 11 inside the strip groove 9. Then, the plate 11 will be pushed by the push plate 12 and move directly to the top of the brick. Then, it will follow the brick and fall down on the top of the brick. There is a certain distance between the adjacent bricks.

[0058] Then, the first chain 3 continues to convey the brick and the fixing block 4 downwards. The bottom of the lowest brick then contacts the top of the pad 11 above the receiving plate 13. Simultaneously, the receiving plate 13 is pressed down, causing it to slide downwards and stretch the first spring 14. The receiving plate 13 then descends along with the lowest brick. Once the bottom pad 11 touches the ground, the lowest (last) brick stops, and the fixing block 4 and the placement piece 7 are moved along with the first chain 3 to the other side of the support plate 2. On one side, the first chain 3 continues to transport the bricks, causing them to continue to descend. After descending a certain distance, the second-to-last brick will contact the pad 11 at the top of the last brick and will be blocked by the pad 11, thus detaching from the supporting plate 7. The supporting plate 7 will contact the last brick during descent, then rotate upward around the axis of rotation, and then pass over the last brick. Then the third, fourth, and so on bricks will gradually stack one by one, and after stacking, they will gradually detach from the supporting plate 7, thus completing the stacking and unloading of the bricks.

[0059] After the bricks are stacked, the upper placement plate 7 will compress the torsion spring 8 and pass over the bricks under the rotation of the first chain 3, without obstruction or interference. Then, the two support plates 2 will slide along the fixed plate 1 to the sides through the drive group. The support plates 2 will drive the first chain 3 to move to the left and right sides of the stacked bricks. Then the receiving plate 13 will be pulled out directly from under the pad 11 that is already in contact with the ground. Then the pad 11 and the bricks will be left directly on the ground. At this time, the unloading and stacking of the bricks are completed.

[0060] In this way, when unloading the bricks, the pads 11 pushed out from inside the bottom groove 10 onto the receiving plate 13 are pre-supported. Then, as the first chain 3 is conveyed, the pads 11 are pushed to the top of the bricks and then follow the bricks down. When the bottom pad 11 contacts the ground, the other pads 11 and the bricks are blocked and will detach from the placement piece 7 on one side one by one, thus completing the unloading and stacking of the bricks one by one. Moreover, the stacking method of this method is more stable, and there will be no positional deviation between the bricks during the unloading process, and the unloading can be done quickly.

[0061] The detection group can perform the detection, so that only when a brick is placed on the placement plate 7, the slider 6 is pressed down to move the second rack rod 19 to a position that can mesh with the first gear 18 during the descent, and then the baffle 15 can be released from the obstruction of the strip groove 9, so that the pad 11 will not appear in the strip groove 9 on one side when the placement plate 7 without a brick is placed is descended, thus avoiding errors.

[0062] As a further embodiment of the present invention, the support plate 2 has a channel 23 inside, which extends from the top of the support plate 2 to the bottom groove 10 and communicates with the strip groove 9 and the bottom groove 10.

[0063] like Figure 12-14 ;

[0064] The pad 11 inside the channel 23 is tightly fitted from top to bottom. Through the channel 23, which is connected to the strip groove 9 and the bottom groove 10, the upper pad 11 can be directly lowered to replenish the pad 11 after it is pushed out. The used pad 11 can also be quickly placed into the channel 23 through the channel 23.

[0065] As a further aspect of the present invention, the drive group includes a separation group and a transmission group;

[0066] The transmission group includes two servo motors 24, both of which are fixedly connected to the support plate 2. The rotation shaft of each servo motor 24 is connected to the transmission roller 5 at the top of the two placement groups by a second chain 25.

[0067] The separation assembly is used to drive the two support plates 2 to slide along the fixed plate 1.

[0068] As a further embodiment of the present invention, the separation group includes a vertical plate 26, the vertical plate 26 is located on one side of the support plate 2, each vertical plate 26 is fixedly connected with a sliding rod 27, each sliding rod 27 is slidably connected to a plurality of push plates 12, a fourth spring 28 is fixedly connected between each sliding rod 27 and the push plate 12, and the sliding rod 27 is fixedly connected to the top plate 33.

[0069] The vertical plate 26 is fixedly connected to a first connecting rod 29, which is slidably connected to the fixed plate 1. A cylinder 30 is fixedly connected between the first connecting rod 29 and the fixed plate 1. A second connecting rod 31 is fixedly connected to the support plate 2, which is slidably connected to the fixed plate 1. A fifth spring 32 is fixedly connected between the fixed plate 1 and the second connecting rod 31.

[0070] like Figure 1-3 , Figure 9 , Figure 12-15 ;

[0071] Before the brick is placed, the cylinder 30 is in the extended state. At this time, the distance between the two support plates 2 is much greater than the brick. At this time, the push plate 12 is on one side of the strip groove 9. The push plate 12 can block the pad 11 inside the strip groove 9, so that the pad 11 will not fall off the strip groove 9 on its own. At this time, the cylinder 30 needs to be shortened to its limit. When the cylinder 30 shortens, it will drive the first connecting rod 29 and the vertical plate 26 to move. The first connecting rod 29 will slide along the fixed plate 1. At this time, the push plate 12 will enter the strip groove 9 and push the pad 11. The top plate 33 will also enter the bottom groove 10 and push the pad 11 inside the bottom groove 10 to the top of the connecting plate 13. The pad 11 inside the strip groove 9 will be blocked by the baffle 15 and cannot move. So when the cylinder 30 shortens, the push plate 12 will slide along the slide rod 27 and compress the fourth spring 28, thereby keeping the push plate 12 pushing the pad 11.

[0072] After the fourth spring 28 is compressed, the cylinder 30 continues to shorten, which will drive the second connecting rod 31 to slide along the fixed plate 1 and compress the fifth spring 32. After the fifth spring 32 is compressed to its limit, the cylinder 30 also shortens to its limit, and then the brick can be placed. During placement, the slider 6 will be compressed. After the second rack rod 19 meshes with the first gear 18, the baffle 15 rises, and then the push plate 12 will push the pad 11 to move above the brick under the elastic action of the fourth spring 28.

[0073] When it is time to unload the bricks, after all the bricks have been stacked, the cylinder 30 extends, and then the support plate 2 is reset under the elastic action of the fifth spring 32 and the push plate 12 is reset under the action of the fourth spring 28, so that the support plate 2 can slide along the fixed plate 1, so that the support plate 2 is away from the bricks, and the connecting plate 13 can be pulled out from under the pad plate 11.

[0074] As a further embodiment of the present invention, the fixed plate 1 is fixedly connected to a push handle, and both the fixed plate 1 and the support plate 2 are fixedly connected to universal wheels 34 at their bottom ends.

[0075] like Figure 1 As shown:

[0076] The casters 34 facilitate the transfer of the fixed plate 1.

Claims

1. A loading and unloading device for construction sites, comprising a fixing plate (1), characterized in that: Two support plates (2) are slidably connected to the fixed plate (1). Each of the two support plates (2) is provided with a support group, a drive group and a detection group. The support group includes two placement groups. The placement assembly includes a first chain (3), two drive rollers (5), several strip grooves (9), and a bottom groove (10). The two drive rollers (5) are rotatably connected to the side wall of the support plate (2). The first chain (3) is drivenly connected to the two drive rollers (5). Several fixing blocks (4) are fixedly connected to the first chain (3). Slider blocks (6) are provided on the fixing blocks (4). Each slider (6) is rotatably connected to a placement piece (7). The placement piece (7) is used to place bricks. A torsion spring (8) is sleeved on the rotating shaft of the placement piece (7). The placement piece (7) can only move towards the bricks. Rotating upwards, the bottom groove (10) is opened at the position of the support plate (2) near the bottom. Several strip grooves (9) are all located above the bottom groove (10) and are distributed at equal distances. A pad (11) is provided inside the strip groove (9) and the bottom groove (10). A push plate (12) and a top plate (33) are respectively provided on the left side of several strip grooves (9) and the left side of the bottom groove (10). A connecting plate (13) is provided on the right side of the bottom groove (10). The connecting plate (13) is slidably connected to the right side wall of the support plate (2). A first spring (14) is fixedly connected between the connecting plate (13) and the support plate (2). The detection group includes baffles (15) corresponding to the strip grooves (9) one by one. The baffles (15) are slidably disposed on the support plate (2) and located on the right side of the strip grooves (9) to block them. A second spring (16) is provided between the baffles (15) and the inner wall of the support plate (2). The baffles (15) are connected to a triggering mechanism that can drive them to slide. The triggering mechanism is set to be triggered when the brick is placed on the placement piece (7), thereby releasing the corresponding baffles (15) from blocking the strip grooves (9). The drive assembly includes a transmission mechanism for driving the transmission roller (5) to rotate, and a separation mechanism for driving the two support plates (2) to move closer or further away from each other along the fixed plate (1); the push plate (12) is connected to the separation mechanism, and when the baffle (15) is released from obstruction, the push plate (12) can push out the pad (11) in the corresponding strip groove (9) under the drive of the separation mechanism.

2. The loading and unloading device for construction sites according to claim 1, characterized in that: The triggering mechanism includes a second rack (19) and a support rod (21) corresponding one-to-one with the number of fixed blocks (4), and a first rack (17) fixedly connected to the end of the baffle (15). The support rods (21) are all located on one side of the second rack (19), and the top of each support rod (21) is rotatably connected to the second rack (19) on one side. The first rack (17) is meshed with a first gear (18). The second rack rod (19) is slidably connected to the limiting groove (20). The limiting groove (20) is opened on the fixed block (4) on one side. The slider (6) is slidably connected to the fixed block (4). The bottom wall of the slider (6) is fixedly connected to the fixed block (4). The bottom end of the support rod (21) is rotatably connected to the side wall of the slider (6). The second rack rod (19) is located to the right of the first gear (18) and does not mesh with the first gear (18). When the brick is placed on the placement plate (7), the weight of the brick presses down the slider (6), thereby causing the support rod (21) to push the second rack rod (19) to slide along the limiting groove (20) to a position where it can mesh with the first gear (18).

3. The loading and unloading device for construction sites according to claim 1, characterized in that: The ends of the placement pieces (7) are all L-shaped.

4. A loading and unloading device for construction sites according to claim 1, characterized in that: The pads (11) are all T-shaped, the bottom groove (10) and the top plate (33) are both T-shaped, the connecting plate (13) can contact the notch at the bottom of the pad (11) and the thickness of the connecting plate (13) is small.

5. A loading and unloading device for construction sites according to claim 1, characterized in that: The support plate (2) has a channel (23) inside. The channel (23) extends from the top of the support plate (2) to the bottom groove (10) and is connected to the strip groove (9) and the bottom groove (10).

6. A loading and unloading device for construction sites according to claim 1, characterized in that: The transmission mechanism includes two servo motors (24), both of which are fixedly connected to the support plate (2). The rotation shafts of the servo motors (24) are connected to the transmission rollers (5) at the top of the two placement groups by a second chain (25).

7. A loading and unloading device for construction sites according to claim 1, characterized in that: The separation mechanism includes a vertical plate (26), which is located on one side of the support plate (2). Each vertical plate (26) is fixedly connected with a slide rod (27). Each slide rod (27) is slidably connected to several push plates (12). A fourth spring (28) is fixedly connected between each slide rod (27) and the push plate (12). The slide rod (27) is fixedly connected to the top plate (33). The vertical plate (26) is fixedly connected to a first connecting rod (29), the first connecting rod (29) is slidably connected to the fixed plate (1), and a cylinder (30) is fixedly connected between the first connecting rod (29) and the fixed plate (1). The support plate (2) is fixedly connected to a second connecting rod (31), the second connecting rod (31) is slidably connected to the fixed plate (1), and a fifth spring (32) is fixedly connected between the fixed plate (1) and the second connecting rod (31).

8. A loading and unloading device for construction sites according to claim 7, characterized in that: The fixed plate (1) is fixedly connected to a push handle, and the bottom ends of the fixed plate (1) and the support plate (2) are both fixedly connected to casters (34).

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