A cantilever unloading platform

Abstract

The sled is configured to have a plurality of independently controlled U-shaped frames, each of which has a plurality of independently controlled U-shaped frames, each of which has a plurality of independently controlled U-shaped frames having a plurality of independently controlled U-shaped frames.

Description

Technical Field

[0001] The invention relates to the field of building construction, in particular to a cantilevered unloading platform. Background Art

[0002] Cantilever unloading platforms are often used on construction sites, and materials are transported and circulated via tower cranes and cantilever unloading platforms. For example, the comparative document CN217998999U discloses a cantilever unloading platform tool-type load-limiting bracket, which is designed with a downward pressure rod 8 and a limiting plug block 1003 to solve the problem of overloading. When overloading occurs, the downward pressure rod 8 causes the limiting plug block 1003 to be inserted into the limiting slot 102, thereby achieving the effect of preventing the unloading platform body 2 from sliding on the bottom slide rail 1 after overloading; but the above solution only prevents the unloading platform body 2 from moving on the slide rail 1, and the slide rail 1 will still be subjected to a large pressure, which will cause the slide rail 1 to deform or the wire rope on the unloading platform to break. When overloading occurs, how to reduce the force on the slide rail or the wire rope is an effective solution. The conventional solution is to add a layer of metal protective plate on the lower side of the existing slide rail 1, but the problem is that the metal protective plate itself is heavy and costly, and because the plate itself is thin, it is troublesome to install it on the exterior wall. Summary of the invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a cantilever unloading platform, which effectively solves the problem that the slide rails of the existing cantilever unloading platform are deformed or the steel wires are broken when overloaded.

[0004] The technical solution is a cantilever unloading platform, comprising two slide rails arranged front and back, each slide rail has a U-shaped frame with an opening facing inward, the two U-shaped frames have openings facing each other, and each U-shaped frame slides on its own slide rail;

[0005] Each U-shaped frame has a vertically placed fixing rod fixed on both sides of the front and rear. The four fixing rods form a rectangle. A flat plate that can slide up and down on the four fixing rods is installed on the four fixing rods. The flat plate is always subjected to an upward force.

[0006] Each U-shaped frame has a left and right support plate on the front and back sides of the frame body. The outer ends of the support plates are hinged on the side plates of the U-shaped frame. Each support plate is always subjected to an upward force. A support plate is installed at the inner end of the support plate. The support plate can move left and right inside the support plate, and the support plate is subjected to a force moving outward from the support plate.

[0007] When the flat plate moves to the uppermost side of the displacement, the upper end surface of the support plate fits with the lower end surface of the flat plate; when the flat plate moves downward, the flat plate drives the pallet to swing downward via the support plate; after the flat plate moves downward and separates from the upper end of the support plate, the upward force of the pallet causes the pallet to swing upward, and the support plate moves into the pallet under the obstruction of the side surface of the flat plate, and the support plate is always placed on one side of the flat plate;

[0008] There is a horizontal bar placed on the lower side of the slide rail and at the front end of the slide rail, and a vertically placed telescopic rod is fixed on the horizontal bar, and the telescopic rod is always subjected to an upward force; when the flat plate moves downward and separates from the upper end of the support plate, the lower end surface of the flat plate contacts the upper end of the telescopic rod, and when the flat plate moves to the lower side of the fixed rod, the telescopic rod stops compressing.

[0009] Each of the fixing rods is provided with a tension spring, one end of which is fixed to the upper end surface of the cavity of the U-shaped frame, and the other end of which is fixed to the flat plate, so that the flat plate is always subjected to an upward force by the tension spring;

[0010] Each support plate is provided with a tension spring, one end of which is fixed on the upper end surface of the support plate, and the other end of which is fixed on the upper end surface of the cavity of the U-shaped frame. The tension spring causes the support plate to be always subjected to an upward force.

[0011] Two extrusion plates are installed on the left and right sides of the flat plate, respectively. The left end surface of the extrusion plate on the left and the right end surface of the extrusion plate on the right are flush with the side surfaces of the corresponding side flat plates. When the support plate moves upward to drive the support plate to move upward, the support plate slides along the outer side surface of the flat plate and contacts the extrusion plate. The extrusion plate keeps the support plate on one side of the flat plate at all times.

[0012] Two top plates are fixed to the upper end surface of the frame body of each U-shaped frame, and each top plate is placed above a supporting plate.

[0013] A countersunk hole is opened at the inner end of the support plate, and the support plate is placed in the countersunk hole. A spring is installed in the countersunk hole. One end of the spring is fixed to the bottom of the countersunk hole, and the other end of the spring is fixed to the support plate. The spring causes the support plate to be subjected to a force moving outward from the support plate.

[0014] An alarm switch is arranged in one of the countersunk holes, and when the support plate moves into the supporting plate, the alarm switch can be triggered, and the alarm sounds.

[0015] Rollers are installed on the front and rear end surfaces of the support plate, and the rollers are located at the end away from the supporting plate.

[0016] There are multiple telescopic rods, and a lifting block is fixed to the upper end of the upper end rod of each telescopic rod. A compression spring is sleeved on each telescopic rod, one end of the compression spring is fixed to the lifting block, and the other end of the compression spring is fixed to the cross bar;

[0017] A rope is fixed on each lifting block, and the other end of the rope is fixed on the cross bar. The rope makes the compression spring on the telescopic rod always in a compressed state.

[0018] The left and right ends of the rear side of the crossbar are each provided with a bearing rod, and the other end of the bearing rod is fixed on the outer wall of the building. At the same time, the left and right ends of the crossbar are provided with a first steel wire rope, and the other end of the first steel wire rope is fixed on the outer wall of the building.

[0019] The present invention uses tension springs on the supporting plate and the flat plate to carry the heavy objects. When the heavy objects are overloaded, the uniform movement of the steel wire rope on the tower crane is used to make the tension of the supporting plate on the heavy objects disappear, thereby transferring part of the force carried by the slide rail, reducing the pressure on the slide rail and ensuring the safety of the slide rail. The transferred force is carried by multiple telescopic rods and the steel wire rope on the tower crane, preventing the transferred force from being fully applied to the steel wire rope on the tower crane, thereby preventing the tower crane from shaking.

[0020] The force of the overweight object is shared by the slide rail and the load-bearing rod respectively through the tension spring on the fixed rod and the compression spring on the telescopic rod, which can ensure that the slide rail and the load-bearing rod will not be deformed while the goods are supported, and the first wire rope will not break, further ensuring the safety of the slide rail. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the front view of the present invention.

[0022] Figure 2 It is a left view of the present invention.

[0023] Figure 3 It is a top view of the present invention with the upper end surface of the U-shaped frame removed.

[0024] Figure 4 It is an enlarged cutaway view of point A of the present invention.

[0025] Figure 5 It is the front view of the reserved left U-shaped frame of the present invention.

[0026] Figure 6 For the present invention Figure 1 Diagram of the plate in the downward pressure state.

[0027] Figure 7 For the present invention Figure 1 State diagram of the middle plate after overload.

[0028] Figure 8 It is a left side view after the present invention is installed on the wall. DETAILED DESCRIPTION

[0029] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0030] Depend on Figures 1 to 8The present invention comprises two slide rails 1 arranged front and back, each slide rail 1 has a U-shaped frame 2 with an opening facing inwards, the openings of the two U-shaped frames 2 are opposite to each other, and each U-shaped frame 2 slides on its own slide rail 1;

[0031] Each U-shaped frame 2 has a vertically placed fixing rod 3 fixed on both sides of the front and rear sides. The four fixing rods 3 form a rectangle. A flat plate 4 that can slide up and down on the four fixing rods 3 is installed on the four fixing rods 3. The flat plate 4 is always subjected to an upward force.

[0032] Each U-shaped frame 2 has a left and right support plate 5 on both sides of the front and rear sides of the frame body. The outer ends of the support plates 5 are hinged on the side plates of the U-shaped frame 2. Each support plate 5 is always subjected to an upward force. A support plate 6 is installed at the inner end of the support plate 5. The support plate 6 can move left and right inside the support plate 5, and the support plate 6 is subjected to a force moving outward from the support plate 5.

[0033] When the flat plate 4 moves to the uppermost side of the displacement, the upper end surface of the support plate 6 fits with the lower end surface of the flat plate 4; when the flat plate 4 moves downward, the flat plate 4 drives the support plate 5 to swing downward through the support plate 6; after the flat plate 4 moves downward and separates from the upper end of the support plate 6, the upward force of the support plate 5 causes the support plate 5 to swing upward, and the support plate 6 moves into the support plate 5 under the obstruction of the side surface of the flat plate 4, and the support plate 6 is always placed on one side of the flat plate 4;

[0034] There is a left and right cross bar 11 at the lower side of the slide rail 1 and at the front end of the slide rail 1, and a vertically placed telescopic rod 9 is fixed on the cross bar 11, and the telescopic rod 9 is always subjected to an upward force; when the flat plate 4 moves downward and separates from the upper end of the support plate 6, the lower end surface of the flat plate 4 contacts the upper end of the telescopic rod 9, and when the flat plate 4 moves to the lower side of the fixed rod, the telescopic rod 9 stops compressing.

[0035] Each of the fixing rods 3 is provided with a tension spring, one end of which is fixed to the upper end surface of the cavity of the U-shaped frame 2, and the other end of which is fixed to the flat plate 4. The tension spring causes the flat plate 4 to always be subjected to an upward force.

[0036] Each support plate 5 is provided with a tension spring, one end of which is fixed to the upper end surface of the support plate 5 and the other end of which is fixed to the upper end surface of the cavity of the U-shaped frame 2. The tension spring causes the support plate 5 to be always subjected to an upward force.

[0037] Two extrusion plates 7 are installed on the left and right sides of the flat plate 4, respectively. The left end surface of the extrusion plate 7 on the left and the right end surface of the extrusion plate 7 on the right are flush with the side surfaces of the corresponding side flat plates 4, respectively. When the support plate 5 moves upward to drive the support plate 6 to move upward, the support plate 6 slides along the outer side surface of the flat plate 4 and contacts the extrusion plate 7, and the extrusion plate 7 keeps the support plate 6 on one side of the flat plate 4;

[0038] Two top plates 8 are fixed to the upper end surface of the frame body of each U-shaped frame 2, and each top plate 8 is placed above a supporting plate 5;

[0039] When the extrusion plate 7 contacts the upper end surface of the frame body of the U-shaped frame 2, the top plate 8 contacts the support plate 5, and the support plate 5 and the supporting plate 6 are in a horizontal state, the supporting plate 6 contacts the lower end surface of the flat plate 4, and at the same time, the springs on the fixing rod 3 and the support plate 5 are in a stretched state;

[0040] Since the left end surface of the extrusion plate 7 on the left and the right end surface of the extrusion plate 7 on the right are respectively flush with the side surfaces of the corresponding side flat plates 4, when the pallet 5 moves upward to drive the support plate 6 to move upward, the support plate 6 slides along the outer side surface of the flat plate 4 and contacts the extrusion plate 7, and the extrusion plate 7 keeps the support plate 6 on one side of the flat plate 4; at the same time, the pallet 5 moves upward to contact the top plate 8, so that the pallet 5 remains in a horizontal state. When the flat plate 4 is reset upward, the support plate 6 moves outward of the pallet 5 and is placed on the lower side of the flat plate 4 again to contact the lower end surface of the flat plate 4;

[0041] The extrusion plate 7 and the top plate 8 make the tension spring fixed on the flat plate 4 and the supporting plate 5 always be subjected to a tension force, so that when the weight of the flat plate 4 carrying the heavy object is small, the flat plate 4 will not move downward.

[0042] A countersunk hole is formed at the inner end of the support plate 5, and the support plate 6 is placed in the countersunk hole. A spring is installed in the countersunk hole, one end of the spring is fixed to the bottom of the countersunk hole, and the other end of the spring is fixed to the support plate 6. The spring causes the support plate 6 to be subjected to a force moving outward from the support plate 5.

[0043] A switch of an alarm is arranged in one of the countersunk holes, and when the support plate 6 moves into the support plate 5, the switch of the alarm can be triggered, and the alarm sounds.

[0044] The front and rear end surfaces of the support plate 6 are equipped with rollers, and the rollers are located at the end away from the support plate 5;

[0045] When the upper end surface of the support plate 6 is separated from the flat plate 4 , the roller will contact the side surface of the flat plate and the corresponding end surface of the extrusion plate, reducing the friction between the support plate 6 and the outer side surface of the flat plate 4 and the extrusion plate 7 .

[0046] There are multiple telescopic rods 9, and a lifting block 10 is fixed to the upper end of the upper end rod of each telescopic rod 9. A compression spring is mounted on each telescopic rod 9, one end of the compression spring is fixed to the lifting block 10, and the other end of the compression spring is fixed to the cross bar 11;

[0047] A rope is fixed to each lifting block 10, and the other end of the rope is fixed to the cross bar 11. The rope keeps the compression spring on the telescopic rod 9 in a compressed state at all times;

[0048] The rope compresses the compression spring, so that when the flat plate 4 moves downward and contacts the telescopic rod, the pressure of the compression spring exerts an upward lifting force on the flat plate 4.

[0049] The left and right ends of the rear side of the cross bar 11 each have a load-bearing rod 12, and the other end of the load-bearing rod 12 is fixed to the outer wall of the building. At the same time, the left and right ends of the cross bar 11 have a first steel wire rope 13, and the other end of the first steel wire rope 13 is fixed to the outer wall of the building.

[0050] In order to install and fix the slide rail 1 , the rear end of the slide rail 1 is placed in a building and fixed, and the front end of the slide rail 1 is fixed to the outer wall of the building via a second steel wire rope 14 .

[0051] In order to ensure that the flat plate 4 can bear heavy objects in its initial state, the height of the extrusion plate 7 is set and a tension spring with corresponding elastic force is selected. When the extrusion plate 7 contacts the U-shaped frame 2, the tension spring on the fixing rod 3 and the tension spring on the support plate 5 are both in a stretched state.

[0052] Before the present invention is used, the flat plate 4 is located at the uppermost side under the action of the tension spring, the support plate 5 and the supporting plate 6 are in a horizontal state under the action of the top plate 8, and the supporting plate 6 is placed at the lower end of the flat plate 4 and in contact with the flat plate 4;

[0053] When the present invention is used, the tower crane lifts the cargo by the steel wire rope and places it on the flat plate 4. When the weight on the flat plate 4 does not cause the flat plate 4 to move downward or the amount of the flat plate 4 moving downward does not cause the support plate 6 to separate from the flat plate 4, it means that the weight is not overweight.

[0054] When the tower crane lifts a heavy object and places it on the plate 4, if the heavy object on the plate 4 is overloaded, the heavy object will cause the plate 4 to move downward and separate the supporting plate 6 from the lower end surface of the plate 4. The supporting plate 6 moves into the plate 5 under the obstruction of the side of the plate 4. After the supporting plate 6 moves into the supporting plate 5, the switch of the alarm is triggered, so that the alarm sounds, and at the same time, the pressure of the plate 4 borne by the tension spring on the supporting plate 5 disappears. However, since the heavy object on the tower crane generally moves at a nearly uniform speed, when the tension force exerted on the plate by the tension spring on the supporting plate 5 disappears, the speed at which the plate 4 moves downward is also nearly uniform, and the deformation of the tension spring on the plate 4 is also nearly constant. Therefore, the tension of the tension spring on the plate 4 will not increase, and the force caused by the disappearance of the tension spring on the supporting plate 5 will be transferred to the steel wire rope of the tower crane, and will not be transferred to the tension spring on the plate 4. This ensures that the slide rail 1 will not be subjected to the overload force, thereby avoiding deformation of the slide rail 1 and breakage of the second steel wire rope 14 on the slide rail 1.

[0055] When the force of the tension spring on the support plate 5 is transferred to the steel wire rope on the tower crane, in order to prevent the tower crane from shaking, before or at the moment when the support plate 6 and the flat plate 4 separate, the flat plate 4 will contact the telescopic rod 9 on the cross bar 11. The telescopic rod 9 can reduce the tension of the steel wire rope on the tower crane, so that multiple telescopic rods 9 and the steel wire rope on the tower crane can bear the tension eliminated by the tension spring on the support plate 5 and prevent the tower crane from shaking.

[0056] If the operator fails to find the alarm in time and stop the weight from falling, the weight will continue to press the plate 4 downward. At this time, the supporting force of the plate 4 comes from the tension springs on the four fixed rods 3 and the compression springs on the telescopic rod 9 on the cross bar 11. Because the weight of the weight lifted by the tower crane usually does not exceed the normal load of the plate 4 too much, the force of the weight is respectively shared by the slide rail 1 and the load-bearing rod 12 through the tension springs on the fixed rod 3 and the compression springs on the telescopic rod 9, which can ensure that the slide rail 1 and the load-bearing rod 12 will not be deformed while the goods are supported, and the second steel wire rope 14 on the slide rail 1 and the first steel wire rope 13 on the load-bearing rod 12 will not break.

[0057] 1. The present invention utilizes the tension springs on the support plate 5 and the flat plate 4 to carry the heavy objects. When the heavy objects are overloaded, the characteristic of the uniform movement of the steel wire rope on the tower crane is utilized to make the pulling force of the support plate 5 on the heavy objects disappear, thereby transferring part of the force carried by the slide rail 1, reducing the pressure borne by the slide rail 1 and ensuring the safety of the slide rail 1; and the transferred force is borne by multiple telescopic rods 9 and the steel wire rope on the tower crane, preventing the transferred force from being fully applied to the steel wire rope on the tower crane, thereby preventing the tower crane from shaking.

[0058] 2. The present invention shares the force of the overweight object to the slide rail 1 and the load-bearing rod 12 respectively through the tension spring on the fixed rod 3 and the compression spring on the telescopic rod 9, which can ensure that the slide rail 1 and the load-bearing rod 12 will not be deformed while the goods are supported, and the first steel wire rope 13 will not break, thereby further ensuring the safety of the slide rail 1.

[0059] 3. The present invention arranges a cross bar 11 at the lower part of the slide rail 1, and the cross bar 11 is fixed to the outer wall via the bearing rods 12 at both ends. The cross bar 11 is light in weight and is convenient to be installed on the outer wall via the bearing rods 12, thereby solving the problems of heavy weight, high cost and troublesome installation of the existing metal protective plate.

Claims

1. A cantilever unloading platform, characterized in that: It comprises two slide rails (1) arranged front and back, each slide rail (1) having a U-shaped frame (2) with an opening facing inwards, the openings of the two U-shaped frames (2) facing each other, and each U-shaped frame (2) slides on its own slide rail (1); A vertically placed fixing rod (3) is fixed on each of the front and rear sides of each U-shaped frame (2), and the four fixing rods (3) form a rectangle. A flat plate (4) capable of sliding up and down on the four fixing rods (3) is mounted on the four fixing rods (3), and the flat plate (4) is always subjected to an upward force; Each U-shaped frame (2) has a support plate (5) arranged on the left and right sides of the frame body, the outer ends of the support plates (5) are hinged to the side plates of the U-shaped frame (2), each support plate (5) is always subjected to an upward force, and a support plate (6) is installed at the inner end of the support plate (5), the support plate (6) can move left and right inside the support plate (5), and the support plate (6) is subjected to a force moving outward from the support plate (5); When the flat plate (4) moves to the uppermost side of the displacement, the upper end surface of the support plate (6) fits with the lower end surface of the flat plate (4); when the flat plate (4) moves downward, the flat plate (4) drives the support plate (5) to swing downward via the support plate (6); after the flat plate (4) moves downward and separates from the upper end of the support plate (6), the upward force of the support plate (5) causes the support plate (5) to swing upward, and the support plate (6) moves into the support plate (5) under the obstruction of the side surface of the flat plate (4), and the support plate (6) is always placed on one side of the flat plate (4); A horizontal bar (11) is disposed on the lower side of the slide rail (1) and at the front end of the slide rail (1). A telescopic rod (9) is fixed vertically on the horizontal bar (11). The telescopic rod (9) is always subjected to an upward force. When the flat plate (4) moves downward and separates from the upper end of the support plate (6), the lower end surface of the flat plate (4) contacts the upper end of the telescopic rod (9). When the flat plate (4) moves to the lower side of the fixed rod, the telescopic rod (9) stops being compressed.

2. A cantilever unloading platform according to claim 1, characterized in that: Each of the fixing rods (3) is sleeved with a tension spring, one end of which is fixed to the upper end surface of the cavity of the U-shaped frame (2), and the other end of which is fixed to the flat plate (4), so that the flat plate (4) is always subjected to an upward force; Each support plate (5) is provided with a tension spring, one end of which is fixed to the upper end surface of the support plate (5), and the other end of which is fixed to the upper end surface of the cavity of the U-shaped frame (2). The tension spring causes the support plate (5) to be constantly subjected to an upward force.

3. The cantilever unloading platform according to claim 2, characterized in that: Two extrusion plates (7) are respectively installed on the left and right sides of the flat plate (4), and the left end surface of the left extrusion plate (7) and the right end surface of the right extrusion plate (7) are respectively flush with the side surfaces of the corresponding side flat plates (4). When the support plate (5) moves upward and drives the support plate (6) to move upward, the support plate (6) slides along the outer side surface of the flat plate (4) and contacts the extrusion plate (7). The extrusion plate (7) makes the support plate (6) always placed on one side of the flat plate (4); Two top plates (8) are fixed to the upper end surface of the frame body of each U-shaped frame (2), and each top plate (8) is placed above a supporting plate (5).

4. The cantilever unloading platform according to claim 1, characterized in that: The inner end of the support plate (5) is provided with a countersunk hole, the support plate (6) is placed in the countersunk hole, a spring is installed in the countersunk hole, one end of the spring is fixed to the bottom of the countersunk hole, and the other end of the spring is fixed to the support plate (6), and the spring causes the support plate (6) to be subjected to a force moving outward from the support plate (5).

5. The cantilever unloading platform according to claim 4, characterized in that: A switch of an alarm is arranged in one of the countersunk holes, and when the support plate (6) moves into the support plate (5), the switch of the alarm can be triggered, and the alarm sounds.

6. The cantilever unloading platform according to claim 4, characterized in that: Rollers are installed on the front and rear end surfaces of the support plate (6), and the rollers are located at the end away from the support plate (5).

7. The cantilever unloading platform according to claim 1, characterized in that: There are a plurality of telescopic rods (9), and a lifting block (10) is fixed to the upper end of the upper end rod of each telescopic rod (9). A compression spring is sleeved on each telescopic rod (9), one end of the compression spring is fixed to the lifting block (10), and the other end of the compression spring is fixed to the cross bar (11); A rope is fixed to each lifting block (10), and the other end of the rope is fixed to the cross bar (11). The rope keeps the compression spring on the telescopic rod (9) in a compressed state at all times.

8. The cantilever unloading platform according to claim 1, characterized in that: The left and right ends of the rear side of the cross bar (11) each have a bearing rod (12), and the other end of the bearing rod (12) is fixed to the outer wall of the building. Meanwhile, the left and right ends of the cross bar (11) have a first steel wire rope (13), and the other end of the first steel wire rope (13) is fixed to the outer wall of the building.

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