Safety protection equipment for construction site and use method thereof

Abstract

The present invention relates to a safety protection device for a construction site, comprising a roof, wherein the cross section of the roof is arranged in a herringbone shape, two first pillars and a second pillar symmetrically distributed in front and back are fixed by bolts on both sides of the top of the roof, guide grooves are provided on the inner sides of the first pillar and the second pillar, guide blocks are slidably connected in the guide grooves, a same first spring is fixed between the guide block and the inner wall of the guide groove by bolts, a support rod is connected with a pin shaft on the inner side of the guide block, a same guide plate is connected with a top pin shaft of two support rods on the same side, sleeve blocks are sleeved on the first pillar and the second pillar, a connecting rod of an integrated structure is arranged on the inner side of the sleeve block, a connecting rod and the guide plate are pin-connected, a positioning block is fixed with a positioning block on the top of the first pillar and the second pillar by bolts, and the two guide plates are staggered in upper and lower positions; the present invention uses a same guide plate to decelerate falling objects twice, and uses two guide plates to decelerate falling objects in two stages, thereby improving the protection effect.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to safety protection equipment used in building construction sites. Background Art

[0002] Construction site operations are a highly dangerous production activity. All mixers produced at the construction site need to be produced under a protective shed. There are many sources of danger at the construction site. Falling objects are one of the major sources of danger at the construction site. It is also a production safety accident that is very likely to occur at the construction site. This source of danger exists at all times and is often fatal to on-site construction and management personnel. In serious cases, it will also cause economic losses to the project.

[0003] At present, setting up a fastener-type steel pipe protection shed on site is a common way of building a mixer protection shed. However, since it is only a temporary facility, the gravity bearing capacity of the entire protection shed is relatively limited. The top of most protection sheds only uses colored steel tiles as overhead protection. A few have added additional layers of formwork to increase strength. The protection effect against falling objects from high altitudes is poor. Therefore, a safety protection equipment for use on construction sites is proposed to solve the above-mentioned problems.

[0004] In order to solve the above problems, the present invention proposes a safety protection device for use at a construction site. Summary of the invention

[0005] The purpose of the present invention is to overcome the problem of poor protective effect of existing protective equipment and to propose a safety protective equipment for construction sites to solve the above technical problems.

[0006] In order to achieve the purpose of the present invention, the technical solution adopted by the present invention is:

[0007] A safety protection device for a construction site includes a roof, wherein the cross-section of the roof is arranged in a herringbone shape, and two first and second pillars symmetrically distributed in front and back are fixed by bolts on both sides of the top of the roof, guide grooves are provided on the inner sides of the first and second pillars, guide blocks are slidably connected in the guide grooves, a same first spring is fixed between the guide block and the inner wall of the guide groove by bolts, a support rod is connected to the inner pin of the guide block, and a same guide plate is connected to the top pins of the two support rods on the same side, sleeve blocks are sleeved on the first and second pillars, a connecting rod of an integrated structure is arranged on the inner side of the sleeve block, the connecting rod and the guide plate are pin-connected, a positioning block is fixed to the top of the first and second pillars by bolts, the two guide plates are staggered up and down, a supporting mechanism is arranged at the bottom of the roof, and a material shaving mechanism is arranged on one of the guide plates located above.

[0008] Preferably, the material leveling mechanism comprises a first material leveling plate, the cross section of the first material leveling plate is arranged to be arc-shaped, and the first material leveling plate is welded and fixed to a side of the guide plate away from the second support column.

[0009] Preferably, the material leveling mechanism includes a second material leveling plate, which is hinged to the side of the bottom of the guide plate away from the second pillar. A guide plate is fixed to the bottom of the guide plate by bolts. A guide groove is provided at the bottom of the guide plate. A guide block is slidably connected in the guide groove. The same guide spring is fixed between the guide block and the inner wall of the guide groove by bolts. The same connecting rod is pin-connected between the guide block and the second material leveling plate.

[0010] Preferably, densely distributed speed reducers are fixed to the top of the guide plate by bolts, the cross-section of the speed reducers is arranged to be spiral, and the speed reducers are made of spring steel material.

[0011] Preferably, the supporting mechanism includes an adjusting plate, a first set of rods are fixed on both sides of the bottom of the roof by bolts, an intermediate rod is inserted at the bottom of the first set of rods, the adjusting plate is fixed to the inner side of the adjusting plate by bolts, an adjusting groove is opened on the inner side of the adjusting plate, an adjusting block is slidably connected in the adjusting groove, a connecting plate is fixed on the inner side of the adjusting block by bolts, the connecting plate and the intermediate rod are fixed by bolts, the inner wall of the bottom of the adjusting groove is rotatably connected to a screw rod through a bearing, and the screw rod and the adjusting block are threadedly connected.

[0012] Preferably, the top of the screw rod passes through the adjustment plate and is sleeved and fixed with a first pulley, and the same belt is sleeved between two first pulleys on the same side.

[0013] Preferably, the two first sets of rods on the same side are fixed with fixing rods on opposite sides by bolts, and the same regulating plate is fixed between the two fixing rods by bolts, and a regulating groove is provided at the bottom of the regulating plate, and a regulating block is slidably connected in the regulating groove, and a shaft rod is rotatably connected to the bottom of the regulating block through a bearing, a second pulley is sleeved and fixed on the shaft rod, and the belt is sleeved on the second pulley, a stud is rotatably connected in the regulating groove through a bearing, and the stud and the regulating block are threadedly connected.

[0014] Preferably, a second set of rods is provided at the bottom of the intermediate rod, and a second spring is fixed to the inner wall of the bottom of the second set of rods by bolts, the second spring and the intermediate rod are fixed by bolts, and limiting grooves are provided on the inner walls on both sides of the second set of rods, and limiting blocks are slidably connected in the limiting grooves, and the limiting blocks and the intermediate rod are fixed by bolts.

[0015] Preferably, a base is fixed to the bottom of the second rod set by bolts, a slide groove is provided on one side of the top of the base, a slider is slidably connected in the slide groove, and a reinforcing rod is pin-connected between the slider and the middle rod.

[0016] Beneficial effects:

[0017] 1. When an object from a high altitude falls and hits the guide plate above, the guide plate, after being subjected to force, moves downward along the axis of the second pillar together with the sleeve block, and presses the guide block downward through the support rod, thereby squeezing the first spring to decelerate the falling object. At the same time, the falling object will slide along the surface of the guide plate. After the guide plate is subjected to force, the guide block is pressed down again through the support rod, thereby squeezing the first spring. The guide plate will gradually tilt downward to form a secondary deceleration, and then the falling object will fall onto the guide plate below. According to the above principle, the falling object is decelerated for a second time, and finally slides along the guide plate to the roof to prevent the falling object from directly hitting the roof, thereby effectively improving the protection effect.

[0018] 2. A first material leveling plate is provided, and the cross-section of the first material leveling plate is arranged to be arc-shaped, that is, when the upper guide plate gradually approaches the other guide plate, the fallen objects are roughly in the position between the two guide plates. A part of the fallen objects will continue to slide along the upper guide plate to the lower guide plate, while the other part of the fallen objects will slide along the lower guide plate to the roof. The first material leveling plate can hinder the two parts of the fallen objects with different sliding tendencies, and make the fallen objects slide in an orderly manner, reduce the speed of the falling objects, and thus improve the protection effect.

[0019] 3. A second material leveling plate is provided. When the upper guide plate gradually approaches the other guide plate, the fallen objects are roughly in the position between the two guide plates. A part of the fallen objects will continue to slide along the upper guide plate to the lower guide plate, while the other part of the fallen objects will slide along the lower guide plate to the roof. Under the impact of the falling objects and the combined action of the guide spring, the second material leveling plate forms a reciprocating swing, which hinders the two parts of the falling objects with different sliding tendencies, and makes the falling objects slide in an orderly manner, reducing the speed of the falling objects, thereby improving the protection effect.

[0020] 4. Turn the screw rod, and then through the transmission cooperation of the first pulley, the second pulley and the belt, the two screw rods on the same side rotate synchronously, and then the adjustment block moves up and down along the adjustment groove, and then synchronously drives the connecting plate and the middle rod to move, so as to adjust the overall height of the roof. When the ground at the construction site is uneven, turn the stud to make the adjustment block move inward along the adjustment groove, and loosen the belt through the second pulley to avoid the two screw rods on the same side from rotating at the same time, so as to achieve separate adjustment, thereby adapting to the uneven ground and performing stable installation.

[0021] 5. When an object falls, the roof and the middle rod of the first set of rods are forced to move downward as a whole, and the middle rod enters the second set of rods to squeeze the second spring, and the elastic force of the second spring is used for shock absorption protection. At the same time, the reverse elastic force of the roof is used to provide stable support for the entire roof, and the overall height of the roof is reduced, and the center of gravity is lowered, thereby making it more stable and improving the protection effect. At the same time, the reinforcing rod pushes the slider to slide accordingly in the slide groove, forming a triangular support to improve stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a safety protection device for use at a construction site according to the present invention;

[0023] Figure 2 This is a schematic diagram of the enlarged structure of point A of a safety protection device for a construction site of the present invention;

[0024] Figure 3 It is a schematic diagram of the working state of the second screed plate of a safety protection device for a construction site of the present invention;

[0025] Figure 4 This is a schematic diagram of the bottom structure of a guide plate of a safety protection device for a construction site of the present invention;

[0026] Figure 5 This is a schematic diagram of the installation structure of a speed reducer for safety protection equipment used at a construction site of the present invention;

[0027] Figure 6 This is a schematic diagram of the enlarged structure of position B of a safety protection device for use at a construction site of the present invention;

[0028] Figure 7 This is a schematic diagram of the bottom structure of a control panel of a safety protection device for a construction site of the present invention;

[0029] Figure 8 The present invention is a schematic diagram of the internal structure of a second set of rods of a safety protection device for use at a construction site.

[0030] The reference numerals are as follows:

[0031] 1. Roof; 2. First pillar; 3. Second pillar; 4. Set block; 5. Connecting rod; 6. Guide plate; 7. Guide groove; 8. Guide block; 9. First spring; 10. Support rod; 11. Positioning block; 12. First material leveling plate; 13. Second material leveling plate; 14. Guide plate; 15. Guide groove; 16. Guide block; 17. Guide spring; 18. Connecting rod; 19. Speed ​​reducer; 20. First set of rods; 21. Intermediate rod; 22. First Two sets of rods; 23, adjusting plate; 24, adjusting slot; 25, adjusting block; 26, screw; 27, connecting plate; 28, first pulley; 29, belt; 30, fixing rod; 31, regulating plate; 32, regulating slot; 33, regulating block; 34, stud; 35, shaft; 36, second pulley; 37, second spring; 38, limit slot; 39, limit block; 40, base; 41, slide slot; 42, slider; 43, reinforcing rod. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] The following is combined with Figure 1-8 The present invention is further described with examples:

[0034] In this embodiment, Figure 1-7 As shown, a safety protection device for a construction site comprises a roof 1, the cross section of the roof 1 is arranged in a herringbone shape, two first pillars 2 and second pillars 3 which are symmetrically distributed front and back are fixed by bolts on both sides of the top of the roof 1, guide grooves 7 are provided on the inner sides of the first pillar 2 and the second pillar 3, guide blocks 8 are slidably connected in the guide grooves 7, a same first spring 9 is fixed between the guide block 8 and the inner wall of the guide groove 7 by bolts, a support rod 10 is connected to the inner side of the guide block 8 by a pin shaft, and a same guide plate 6 is connected to the top of the two support rods 10 on the same side by a pin shaft, a sleeve block 4 is sleeved on the first pillar 2 and the second pillar 3, a connecting rod 5 of an integrated structure is arranged on the inner side of the sleeve block 4, the connecting rod 5 and the guide plate 6 are pin-connected, a positioning block 11 is fixed to the top of the first pillar 2 and the second pillar 3 by bolts, the two guide plates 6 are staggered up and down, a supporting mechanism is arranged at the bottom of the roof 1, and a material shaving mechanism is arranged on one of the guide plates 6 located at the top.

[0035] Furthermore, the material leveling mechanism includes a first material leveling plate 12, the cross section of the first material leveling plate 12 is configured to be arc-shaped, and the first material leveling plate 12 is welded and fixed to the side of the guide plate 6 away from the second support 3, so as to improve the protection effect.

[0036] Furthermore, the material leveling mechanism includes a second material leveling plate 13, which is hinged to the side of the bottom of the guide plate 6 away from the second pillar 3. A guide plate 14 is fixed to the bottom of the guide plate 6 by bolts. A guide groove 15 is provided at the bottom of the guide plate 14. A guide block 16 is slidably connected in the guide groove 15. The same guide spring 17 is fixed between the guide block 16 and the inner wall of the guide groove 15 by bolts. The same connecting rod 18 is pin-connected between the guide block 16 and the second material leveling plate 13, which can improve the protection effect.

[0037] Furthermore, densely distributed speed reducers 19 are fixed on the top of the guide plate 6 by bolts. The cross-section of the speed reducer 19 is set to be spiral. The speed reducer 19 is made of spring steel material, and the spiral speed reducer 19 can decelerate the falling objects by colliding with the falling objects. At the same time, the compressed speed reducer 19 will curl up, and a height difference will be formed between the speed reducer 19 and the uncompressed speed reducer 19, thereby hindering the sliding process of the falling objects.

[0038] Furthermore, the supporting mechanism includes an adjusting plate 23, a first set of rods 20 are fixed to both sides of the bottom of the roof 1 by bolts, an intermediate rod 21 is inserted into the bottom of the first set of rods 20, the adjusting plate 23 is fixed to the inner side of the adjusting plate 23 by bolts, an adjusting groove 24 is opened on the inner side of the adjusting plate 23, an adjusting block 25 is slidably connected in the adjusting groove 24, a connecting plate 27 is fixed to the inner side of the adjusting block 25 by bolts, the connecting plate 27 and the intermediate rod 21 are fixed by bolts, the inner wall of the bottom of the adjusting groove 24 is rotatably connected to a screw 26 through a bearing, the screw 26 and the adjusting block 25 are threadedly connected, and the height of the roof 1 can be adjusted.

[0039] Furthermore, the top of the screw rod 26 passes through the adjustment plate 23 and is sleeved and fixed with a first pulley 28. The same belt 29 is sleeved between the two first pulleys 28 on the same side, so that the two screw rods 26 can rotate synchronously, which is convenient for adjustment.

[0040] Furthermore, the opposite sides of the two first sets of rods 20 on the same side are fixed with fixed rods 30 by bolts, and the same regulating plate 31 is fixed between the two fixed rods 30 by bolts. A regulating groove 32 is provided at the bottom of the regulating plate 31, and a regulating block 33 is slidably connected in the regulating groove 32. The bottom of the regulating block 33 is rotatably connected to an axle rod 35 through a bearing. A second pulley 36 is sleeved and fixed on the axle rod 35, and the belt 29 is sleeved on the second pulley 36. A stud 34 is rotatably connected in the regulating groove 32 through a bearing. The stud 34 and the regulating block 33 are threadedly connected, so that the tension of the belt 29 can be controlled.

[0041] In this embodiment, refer to Figure 1 and Figure 8A second set of rods 22 is provided at the bottom of the middle rod 21, and a second spring 37 is fixed to the inner wall of the bottom of the second set of rods 22 by bolts. The second spring 37 and the middle rod 21 are fixed by bolts. Limiting grooves 38 are provided on the inner walls on both sides of the second set of rods 22. Limiting blocks 39 are slidably connected in the limiting grooves 38. The limiting blocks 39 and the middle rod 21 are fixed by bolts, which can further improve the protection effect.

[0042] Furthermore, a base 40 is fixed to the bottom of the second set of rods 22 by bolts, a slide groove 41 is opened on one side of the top of the base 40, a slider 42 is slidably connected in the slide groove 41, and a reinforcing rod 43 is pin-connected between the slider 42 and the middle rod 21 to improve stability.

[0043] When an object from a high altitude falls, it hits the guide plate 6 located above. After the guide plate 6 is subjected to force, it moves downward along the axial direction of the second pillar 3 together with the sleeve block 4, and presses the guide block 8 downward through the support rod 10, and then squeezes the first spring 9 to decelerate the falling object. At the same time, the falling object will slide along the surface of the guide plate 6. After the guide plate 6 is subjected to force, the guide block 8 is pressed down again through the support rod 10, and then squeezes the first spring 9. The guide plate 6 will gradually tilt downward to form a secondary deceleration, and then the falling object will fall on the guide plate 6 located below. According to the above principle, the falling object is decelerated for a second period of time, and the falling object finally slides along the guide plate 6 to the roof 1, avoiding the falling object from directly hitting the roof 1, thereby effectively improving the protection effect.

[0044] Furthermore, a first material leveling plate 12 is provided, and the cross-section of the first material leveling plate 12 is arranged to be arc-shaped, that is, when the guide plate 6 located above gradually approaches the other guide plate 6, the fallen objects are roughly in the position between the two guide plates 6. A part of the fallen objects will continue to slide along the upper guide plate 6 to the guide plate 6 located below, while the other part of the fallen objects will slide along the lower guide plate 6 to the roof 1. The first material leveling plate 12 can hinder the two parts of the fallen objects with different sliding tendencies, and make the fallen objects slide in an orderly manner, reduce the speed of the falling objects, and thus improve the protection effect.

[0045] Furthermore, a second material leveling plate 13 is provided. When the upper guide plate 6 gradually approaches the other guide plate 6, the fallen objects are roughly in the position between the two guide plates 6. A part of the fallen objects will continue to slide along the upper guide plate 6 to the lower guide plate 6, while the other part of the fallen objects will slide along the lower guide plate 6 to the roof 1. Under the impact of the falling objects and the combined action of the guide spring 17, the second material leveling plate 13 forms a reciprocating swing, which hinders the two parts of falling objects with different sliding tendencies, and makes the falling objects slide in an orderly manner, reducing the speed of the falling objects, thereby improving the protection effect.

[0046] Furthermore, the screw rod 26 is rotated, and then the two screw rods 26 on the same side are synchronously rotated through the transmission cooperation of the first pulley 28, the second pulley 36 and the belt 29, and then the adjustment block 25 is moved up and down along the adjustment groove 24, and then the connecting plate 27 and the intermediate rod 21 are synchronously driven to move, so as to adjust the overall height of the roof 1. When the ground at the construction site is uneven, the stud 34 is rotated to make the adjustment block 33 move inward along the adjustment groove 32, and the belt 29 is loosened by the second pulley 36, so as to avoid the two screw rods 26 on the same side from rotating at the same time, and realize separate adjustment, thereby adapting to the uneven ground and performing stable installation.

[0047] When an object falls, the roof 1 and the middle rod 21 of the first set of rods 20 are forced to move downward as a whole, and the middle rod 21 enters the second set of rods 22 to squeeze the second spring 37. The elastic force of the second spring 37 is used for shock absorption protection. At the same time, the roof 1 is stably supported as a whole through its reverse elastic force, and the overall height of the roof 1 is reduced, and the center of gravity is lowered, thereby being more stable and improving the protection effect. At the same time, the reinforcing rod 43 pushes the slider 42 to slide accordingly in the slide groove 41, forming a triangular support to improve stability.

[0048] Working principle: When in use, when an object from a high altitude falls, it hits the guide plate 6 located above. After the guide plate 6 is stressed, it moves downward along the axis of the second pillar 3 together with the sleeve block 4, and presses the guide block 8 downward through the support rod 10, and then squeezes the first spring 9 to decelerate the falling object. At the same time, the falling object will slide along the surface of the guide plate 6. After the guide plate 6 is stressed, the guide block 8 is pressed down again through the support rod 10, and then squeezes the first spring 9. The guide plate 6 will gradually tilt downward to form a secondary deceleration, and then the falling object will fall on the guide plate 6 located below. According to the above principle, the falling object is decelerated for a second period of time, and the falling object finally slides along the guide plate 6 to the roof 1, preventing the falling object from directly hitting the roof 1, thereby effectively improving the The protective effect is further provided with a first material leveling plate 12, and the cross-section of the first material leveling plate 12 is set to be arc-shaped, that is, when the guide plate 6 located at the top gradually approaches the other guide plate 6, the fallen objects are roughly in the position between the two guide plates 6, and a part of the fallen objects will continue to slide along the upper guide plate 6 to the guide plate 6 located at the bottom, while the other part of the fallen objects will slide along the lower guide plate 6 to the roof 1. The first material leveling plate 12 can hinder the two parts of fallen objects with different sliding tendencies, and make the fallen objects slide in an orderly manner, reduce the speed of the falling objects, thereby improving the protective effect. Further, a second material leveling plate 13 is provided. When the guide plate 6 located at the top gradually approaches the other guide plate 6, the fallen objects are roughly in the position between the two guide plates The second material leveling plate 13 is formed to swing back and forth under the impact of the falling objects and the joint action of the guide spring 17, thereby hindering the two parts of falling objects with different sliding tendencies, making the falling objects slide in an orderly manner, reducing the speed of the falling objects, and thus improving the protection effect. Further, the screw rod 26 is rotated, and then the two screw rods 26 on the same side are synchronously rotated through the transmission cooperation of the first pulley 28, the second pulley 36 and the belt 29, thereby making the adjusting block 25 move up and down along the adjusting slot 24, thereby synchronously driving the connecting plate 27 and the intermediate rod 21 to move, thereby When adjusting the overall height of the roof 1, when the ground at the construction site is uneven, the stud 34 is rotated to make the regulating block 33 move inward along the regulating groove 32, and the belt 29 is loosened by the second pulley 36, so as to avoid releasing the two screws 26 on the same side from rotating at the same time, so as to achieve separate adjustment, thereby adapting to the uneven ground and performing stable installation. When an object falls, the roof 1 and the first set of rods 20 and the middle rod 21 are forced to move downward as a whole, and the middle rod 21 enters the second set of rods 22 to squeeze the second spring 37, and the elastic force of the second spring 37 is used for shock absorption protection. At the same time, the roof 1 is stably supported as a whole by its reverse elastic force, and the overall height of the roof 1 is reduced, and the center of gravity is lowered, so that it is more stable and the protection effect is improved.At the same time, the reinforcing rod 43 pushes the slider 42 to slide in the slide groove 41 accordingly, forming a triangular support to improve stability.

[0049] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A safety protection device for a construction site, comprising a roof (1), characterized in that: The roof (1) has a cross-section in a herringbone shape. Two first pillars (2) and second pillars (3) are fixedly connected to the top of the roof (1) on both sides thereof and are symmetrically distributed frontward and rearward. A guide groove (7) is provided on the inner side of each of the first pillar (2) and the second pillar (3). A guide block (8) is slidably connected to the guide groove (7). A first spring (9) is fixedly connected between the guide block (8) and the inner wall of the guide groove (7). A support rod (10) is connected to the inner side of the guide block (8) via a pin shaft. The tops of the two support rods (10) on the same side are connected to the same guide plate (6) via a pin shaft. A sleeve block (4) is sleeved on each of the first pillar (2) and the second pillar (3). A connecting rod (5) of an integral structure is provided on the inner side of the sleeve block (4). The connecting rod (5) and the guide plate (6) are connected via a pin shaft. A positioning block (11) is fixedly connected to the top of each of the first pillar (2) and the second pillar (3). The two guide plates (6) are staggered in upper and lower positions. A support mechanism is provided at the bottom of the roof (1). A material leveling mechanism is provided on one of the guide plates (6) located at the top. The material leveling mechanism comprises a second material leveling plate (13), the second material leveling plate (13) being hinged to a side of the bottom of the guide plate (6) away from the second pillar (3), the bottom of the guide plate (6) being fixedly connected to a guide plate (14), the bottom of the guide plate (14) being provided with a guide groove (15), a guide block (16) being slidably connected in the guide groove (15), a guide spring (17) being fixedly connected between the guide block (16) and the inner wall of the guide groove (15), and a connecting rod (18) being pin-connected between the guide block (16) and the second material leveling plate (13); The top of the guide plate (6) is fixedly connected with densely distributed speed reducers (19), the cross section of the speed reducers (19) is arranged in a spiral shape, and the speed reducers (19) are made of spring steel material; The support mechanism comprises an adjustment plate (23), a first set of rods (20) are fixedly connected to both sides of the bottom of the roof (1), an intermediate rod (21) is inserted into the bottom of the first set of rods (20), the adjustment plate (23) is fixedly connected to the inner side of the adjustment plate (23), an adjustment groove (24) is provided on the inner side of the adjustment plate (23), an adjustment block (25) is slidably connected in the adjustment groove (24), a connecting plate (27) is fixedly connected to the inner side of the adjustment block (25), the connecting plate (27) and the intermediate rod (21) are fixedly connected, a screw rod (26) is rotatably connected to the inner wall of the bottom of the adjustment groove (24), and the screw rod (26) and the adjustment block (25) are threadedly connected; The top of the screw rod (26) passes through the adjustment plate (23) and is sleeved and fixed with a first belt pulley (28), and a belt (29) is sleeved between two first belt pulleys (28) on the same side; The two first sleeve rods (20) on the same side are fixedly connected to a fixed rod (30) on opposite sides, and a same regulating plate (31) is fixedly connected between the two fixed rods (30). A regulating groove (32) is provided at the bottom of the regulating plate (31), a regulating block (33) is slidably connected in the regulating groove (32), a shaft (35) is rotatably connected at the bottom of the regulating block (33), a second pulley (36) is sleeved and fixed on the shaft (35), a belt (29) is sleeved on the second pulley (36), a stud (34) is rotatably connected in the regulating groove (32), and the stud (34) and the regulating block (33) are threadedly connected.

2. A safety protection device for construction sites as claimed in claim 1, characterized in that: A second rod (22) is disposed at the bottom of the middle rod (21); a second spring (37) is fixedly connected to the inner wall of the bottom of the second rod (22); the second spring (37) and the middle rod (21) are fixedly connected; limiting grooves (38) are provided on the inner walls on both sides of the second rod (22); limiting blocks (39) are slidably connected in the limiting grooves (38); and the limiting blocks (39) and the middle rod (21) are fixedly connected.

3. A safety protection device for construction sites as claimed in claim 2, characterized in that: The bottom of the second rod (22) is fixedly connected to a base (40), a top side of the base (40) is provided with a slide groove (41), a slider (42) is slidably connected in the slide groove (41), and a reinforcing rod (43) is pin-connected between the slider (42) and the middle rod (21).

4. A method for using a safety protection device for a construction site as claimed in claim 3, characterized in that: When an object falls from a high altitude, it hits the guide plate (6) located above. After the guide plate (6) is subjected to force, it moves downward along the axis of the second pillar (3) together with the sleeve block (4), and presses the guide block (8) downward through the support rod (10), thereby squeezing the first spring (9) and decelerating the falling object. At the same time, the falling object slides along the surface of the guide plate (6). After the guide plate (6) is subjected to force, it presses the guide block (8) downward again through the support rod (10), thereby squeezing the first spring (9), and the guide plate (6) gradually tilts downward, thereby forming a secondary deceleration. The falling object then falls onto the guide plate (6) located below. According to the above principle, the falling object is decelerated at a secondary level and finally slides along the guide plate (6). The guide plate (6) slides onto the roof (1) to prevent the falling objects from directly hitting the roof (1), thereby effectively improving the protection effect. Furthermore, a second material leveling plate (13) is provided. When the upper guide plate (6) gradually approaches the other guide plate (6), the falling objects are roughly located between the two guide plates (6). A portion of the falling objects will continue to slide along the upper guide plate (6) to the lower guide plate (6), while another portion of the falling objects will slide along the lower guide plate (6) to the roof (1). Under the impact of the falling objects and the combined action of the guide spring (17), the second material leveling plate (13) forms a reciprocating swing to hinder the two portions of falling objects with different sliding tendencies, and The falling objects are made to slide down in an orderly manner, and the speed of the falling objects is reduced, thereby improving the protection effect. Furthermore, the screw rod (26) is rotated, and then the two screw rods (26) on the same side are synchronously rotated through the transmission cooperation of the first pulley (28), the second pulley (36) and the belt (29), and then the adjustment block (25) is moved up and down along the adjustment groove (24), and then the connecting plate (27) and the intermediate rod (21) are synchronously driven to move, thereby adjusting the overall height of the roof (1). When the ground at the construction site is uneven, the stud (34) is rotated to make the adjustment block (33) move inward along the adjustment groove (32), and the belt (29) is loosened through the second pulley (36), so as to avoid releasing the two screw rods (25) on the same side. 26) rotate simultaneously to achieve individual adjustment, thereby adapting to uneven ground and performing stable installation. When an object falls, the roof (1), the first set of rods (20) and the middle rod (21) are forced to move downward as a whole, and the middle rod (21) enters the second set of rods (22) to squeeze the second spring (37). The elastic force of the second spring (37) is used for shock absorption protection. At the same time, the roof (1) is stably supported as a whole by its reverse elastic force, thereby reducing the overall height of the roof (1) and the center of gravity, thereby making it more stable and improving the protection effect. At the same time, the reinforcing rod (43) pushes the slider (42) to slide correspondingly in the slide groove (41), forming a triangular support to improve stability.

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