Multi-stage energy consumption bridge forcible entry protection cooperation system

Abstract

The utility model discloses a multistage energy consumption bridge forcible entry protection cooperation system which comprises a support. The multi-stage energy consumption plate assembly is arranged on the bracket; the bridge dismantling mechanism is connected to the support and located in front of the multi-stage energy consumption plate assembly; and the supporting leg mechanism is connected to the support and located behind the multi-stage energy consumption plate assembly. According to the multi-stage energy consumption bridge forcible entry protection cooperation system, the bridge dismantling mechanism and the multi-stage energy consumption plate assembly are integrated together, when a bridge is dismantled, the device can be independently used, a corresponding protection plate does not need to be independently installed on the bridge, related installation procedures can be effectively saved, and the installation efficiency is improved. And the working intensity of operators is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of bridge demolition devices, and in particular to a multi-level energy-consuming bridge demolition protection and coordination system. Background Technology

[0002] Bridges are structures built to span valleys, roads, waterways, or other obstacles, playing a vital role in creating extensive transportation networks. To meet ever-increasing transportation demands, bridges need repair and reconstruction when necessary. Bridge demolition is a crucial step in this process. During bridge demolition, construction workers sometimes need to work alongside the bridge under construction; therefore, appropriate safety measures must be implemented to ensure their safety.

[0003] In related technologies, safety protection during bridge demolition is achieved by installing protective barriers or similar devices on the bridge deck. However, this requires the installation of new protective barriers for each bridge demolished, making the operation cumbersome and increasing the workload for the workers. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a multi-stage energy-consuming bridge demolition protection collaborative system, which can save the process of installing protective barriers on the bridge deck and reduce the workload of workers.

[0005] A multi-level energy-consuming bridge demolition protection and coordination system according to some embodiments of the present invention includes: a support frame; a multi-level energy-consuming plate assembly disposed on the support frame; a bridge demolition mechanism connected to the support frame and located in front of the multi-level energy-consuming plate assembly; and a support leg mechanism connected to the support frame and located behind the multi-level energy-consuming plate assembly.

[0006] The multi-level energy-consuming bridge demolition protection collaborative system according to the embodiments of this utility model has at least the following beneficial effects:

[0007] In this multi-stage energy-dissipating bridge demolition protection system, the bridge demolition mechanism is mounted on a support frame. This mechanism dismantles the bridge. Because it is located in front of the multi-stage energy-dissipating plate assembly, when materials generated during bridge demolition are splashed onto the assembly, the assembly buffers and dissipates the impact energy, thus protecting people or objects behind it and reducing the risk of injury. Furthermore, the support mechanism, mounted on the support frame, provides support for the entire system, improving stability and reducing the risk of overturning during operation. Additionally, because it is located behind the multi-stage energy-dissipating plate assembly, the assembly prevents splashed materials from impacting the dismantled bridge. In this utility model, the multi-level energy-consuming bridge demolition protection collaborative system integrates the bridge demolition mechanism and the multi-level energy-consuming plate assembly. When demolishing a bridge, the device can be used alone, eliminating the need to install separate protective plates on the bridge. This effectively saves on related installation procedures and reduces the workload of workers.

[0008] According to some embodiments of the present invention, the multi-level energy-consuming board assembly includes multiple energy-consuming boards arranged sequentially from back to front.

[0009] According to some embodiments of the present invention, the multi-level energy-consuming board assembly includes a first energy-consuming board, a second energy-consuming board, a third energy-consuming board, and a fourth energy-consuming board arranged sequentially from back to front.

[0010] The first energy-consuming board has multiple V-shaped structures arranged in parallel, the third energy-consuming board is a noise-reducing board, and the fourth energy-consuming board is an energy-absorbing board.

[0011] According to some embodiments of the present invention, the bracket includes a first upright plate, and the multi-level energy-consuming plate assembly is fixed to the front surface of the first upright plate.

[0012] According to some embodiments of the present invention, the bridge demolition mechanism includes a first rotary drive assembly disposed on the support, a telescopic member drivenly connected to the first rotary drive assembly, and a bridge demolition member connected to the telescopic member;

[0013] The first rotation drive assembly is used to drive the telescopic member to rotate on a horizontal plane, and the telescopic member can drive the bridge dismantling member to translate in the horizontal direction.

[0014] According to some embodiments of the present invention, the first rotation drive assembly includes a first motor disposed on the bracket, a swing arm connected to the drive shaft of the first motor, and one end of the telescopic member connected to the swing arm.

[0015] According to some embodiments of this utility model, the number of the support leg mechanisms is two, the two support leg mechanisms are arranged side by side, the arrangement direction of the two support leg mechanisms is horizontal and perpendicular to the front and back direction, and the angle between the two support leg mechanisms is adjustable.

[0016] According to some embodiments of the present invention, the support mechanism includes a second rotation drive assembly disposed on the bracket, and a support assembly drivenly connected to the second rotation drive assembly;

[0017] The second rotation drive component is used to drive the support leg assembly to rotate on the horizontal plane.

[0018] According to some embodiments of the present invention, the second rotation drive assembly includes a second motor disposed on the bracket, and the support leg assembly is connected to the drive shaft of the second motor.

[0019] According to some embodiments of the present invention, the support leg assembly includes a support leg that is driven and connected to the second rotation drive assembly, and a roller disposed at the bottom of the support leg.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 This is a front view structural diagram of a multi-level energy-consuming bridge demolition protection collaborative system according to an embodiment of the present invention.

[0023] Figure 2 This is a top view schematic diagram of a multi-level energy-consuming bridge demolition protection collaborative system according to an embodiment of the present invention.

[0024] Figure 3 This is a schematic diagram of the multi-level energy-consuming bridge demolition protection collaborative system according to an embodiment of the present invention during use.

[0025] Figure 4 This is a partial structural schematic diagram of a multi-level energy-consuming board assembly according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the fourth energy-consuming board according to an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the first energy-consuming board according to an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of a first rotary drive assembly according to an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the support leg assembly according to one embodiment of the present invention.

[0030] Icon labels:

[0031] 100. Multi-stage energy-consuming bridge demolition protection collaborative system; 110. Support frame; 111. First upright plate; 112. Second upright plate; 120. Multi-stage energy-consuming plate assembly; 121. First energy-consuming plate; 122. Second energy-consuming plate; 123. Third energy-consuming plate; 124. Fourth energy-consuming plate; 125. Screw; 126. Nut; 130. Bridge demolition mechanism; 131. First rotary drive assembly; 1311. First motor; 1312. Drive shaft of the first motor; 13121. The first... 1313 Threaded section; 1314 First retaining ring; 1315 First nut; 1315 Rocker arm; 13151 First through hole; 132 Telescopic component; 133 Bridge dismantling component; 140 Leg mechanism; 141 Second rotary drive assembly; 1411 Second motor; 1412 Drive shaft of the second motor; 1413 Second retaining ring; 1414 Second nut; 142 Leg assembly; 1421 Leg; 14211 Second through hole; 1422 Roller;

[0032] 200. Bridge. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] like Figure 1 , Figure 2 As shown, an embodiment of the present invention provides a multi-level energy-consuming bridge demolition protection collaborative system, including a support 110, a multi-level energy-consuming plate assembly 120, a bridge demolition mechanism 130, and a support leg mechanism 140.

[0037] The bracket 110 serves as the mounting base for the entire device and is used to install other components.

[0038] The multi-level energy dissipation board assembly 120 is mounted on the bracket 110.

[0039] Specifically, the multi-stage energy dissipation panel assembly 120 is mounted on the bracket 110 and is set vertically. The multi-stage energy dissipation panel assembly 120 can buffer and dissipate the energy of the impact force.

[0040] The bridge dismantling mechanism 130 is connected to the support 110 and is located in front of the multi-stage energy dissipation panel assembly 120.

[0041] Specifically, the bridge dismantling mechanism 130 is mounted on the bracket 110. The bridge dismantling mechanism 130 can dismantle the bridge 200. Since the bridge dismantling mechanism 130 is located in front of the multi-stage energy dissipation plate assembly 120, when the bridge 200 is dismantled by the bridge dismantling mechanism, the material generated by the breaking of the bridge 200 splashes onto the multi-stage energy dissipation plate assembly 120. The multi-stage energy dissipation plate assembly 120 can block the material, buffering and consuming the impact energy of the material. This protects people or objects behind the multi-stage energy dissipation plate assembly 120 and reduces the risk of damage to relevant personnel and objects.

[0042] The support mechanism 140 is connected to the bracket 110 and is located behind the multi-stage energy dissipation panel assembly 120.

[0043] Specifically, the support mechanism 140 is mounted on the bracket 110 and can support the entire device, improve the stability of the device, and reduce the risk of the device overturning during operation. In addition, since the support mechanism 140 is located behind the multi-stage energy dissipation plate assembly 120, the multi-stage energy dissipation plate assembly 120 can prevent the flying materials generated when the bridge 200 is dismantled from hitting the support mechanism 140.

[0044] Combination Figure 1 , Figure 2 and Figure 3 In the multi-level energy-consuming bridge demolition protection collaborative system of this utility model, the bridge demolition mechanism 130 and the multi-level energy-consuming plate assembly 120 are integrated together. When demolishing the bridge 200, the device can be used alone, eliminating the need to install the corresponding protective plate separately on the bridge 200. This can effectively save related installation procedures and reduce the workload of the workers.

[0045] like Figure 1 As shown, it should be noted that the bracket 110 includes a first upright plate 111, the front surface of the first upright plate 111 faces forward, and the multi-level energy dissipation plate assembly 120 is fixed to the front surface of the first upright plate 111.

[0046] Furthermore, the support 110 also includes a second upright plate 112 connected to the first upright plate 111. The second upright plate 112 is located in front of the first upright plate 111 and is shorter than the first upright plate 111. The front surface of the second upright plate 112 faces forward, and the bridge dismantling mechanism 130 is connected to the front surface of the second upright plate 112.

[0047] Combination Figure 1 and Figure 2 The multi-level energy-consuming board assembly 120 includes multiple energy-consuming boards arranged sequentially from back to front.

[0048] Furthermore, the multi-level energy-consuming board assembly 120 includes a first energy-consuming board 121, a second energy-consuming board 122, a third energy-consuming board 123, and a fourth energy-consuming board 124 arranged sequentially from back to front.

[0049] Combination Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 The first energy-consuming plate 121 has multiple V-shaped structures arranged in parallel, and the material of the first energy-consuming plate 121 is steel; the material of the second energy-consuming plate 122 is also steel; the third energy-consuming plate 123 is a noise-reducing plate, specifically a foam aluminum plate; and the fourth energy-consuming plate 124 is an energy-absorbing plate, specifically an artificial cartilage bionic energy-absorbing plate.

[0050] It should be noted that the artificial cartilage bionic energy-absorbing plate can efficiently absorb impact energy, the foam aluminum plate has excellent noise reduction performance, and the first energy-consuming plate 121 has high rigidity while ensuring the structure is lightweight.

[0051] The specific installation method of the multi-level energy dissipation board assembly 120 in the above embodiment is as follows:

[0052] First, one side of the first energy-consuming plate 121 is welded to the front surface of the first upright plate 111. Then, the second energy-consuming plate 122 is welded to the other side of the first energy-consuming plate 121. Next, the fourth energy-consuming plate 124, the third energy-consuming plate 123 and the second energy-consuming plate 122 are stacked together. The screw 125 is passed through the fourth energy-consuming plate 124, the third energy-consuming plate 123 and the second energy-consuming plate 122 in sequence, and the nut 126 is sleeved on the screw 125, thereby fixing the fourth energy-consuming plate 124, the third energy-consuming plate 123 and the second energy-consuming plate 122.

[0053] like Figure 1 As shown, in some embodiments, the bridge demolition mechanism 130 includes a first rotary drive assembly 131 disposed on a bracket 110, a telescopic member 132 drivenly connected to the first rotary drive assembly 131, and a bridge demolition member 133 connected to the telescopic member 132; wherein, the first rotary drive assembly 131 is used to drive the telescopic member 132 to rotate on a horizontal plane, and the telescopic member 132 can drive the bridge demolition member 133 to translate in the horizontal direction.

[0054] Specifically, the first rotary drive assembly 131 is fixed to the front surface of the second upright plate 112. The first rotary drive assembly 131 can drive the telescopic member 132 to rotate on the horizontal plane, thereby causing the bridge dismantling member 133 to rotate on the horizontal plane. The telescopic member 132 can drive the bridge dismantling member 133 to translate in the horizontal direction. In this way, under the combined action of the first rotary drive assembly 131 and the telescopic member 132, the translation and rotation of the bridge dismantling member 133 can be realized, thereby achieving the purpose of moving the bridge dismantling member 133 to different positions.

[0055] Combination Figure 1 and Figure 7 Specifically, the first rotation drive assembly 131 includes a first motor 1311 mounted on the bracket 110, a swing arm 1315 connected to the drive shaft 1312 of the first motor, and one end of the telescopic member 132 connected to the swing arm 1315 and the other end connected to the bridge dismantling member 133.

[0056] The drive shaft 1312 of the first motor is arranged vertically, the swing arm 1315 is arranged horizontally, and one end of the swing arm 1315 is connected to the drive shaft 1312 of the first motor. The first motor 1311 can drive the swing arm 1315 to rotate on the horizontal plane. The telescopic member 132 is arranged horizontally, and one end of the telescopic member 132 is connected to the end of the swing arm 1315 away from the first motor 1311. The other end of the telescopic member 132 is connected to the bridge dismantling member 133.

[0057] Specifically, the drive shaft 1312 of the first motor is fitted with a first retaining ring 1313, and one end of the swing arm 1315 is provided with a first through hole 13151 for the drive shaft 1312 of the first motor to pass through. The drive shaft 1312 of the first motor has a first threaded section 13121, and a first nut 1314 is fitted onto the first threaded section 13121. One end of the swing arm 1315 is clamped and fixed between the first retaining ring 1313 and the first nut 1314. One end of the telescopic member 132 is fixedly connected to the end of the swing arm 1315 away from the first motor 1311, and the bridge demolition member 133 is fixedly connected to the end of the telescopic member 132 away from the swing arm 1315. The telescopic member 132 can be a cylinder, a hydraulic cylinder, or a linear push rod, and the bridge demolition member 133 is a drilling rig with the drill bit of the bridge demolition member 133 facing downwards.

[0058] The specific installation method of the bridge demolition mechanism 130 in the above embodiment is as follows:

[0059] The first fixing ring 1313 is sleeved on the drive shaft 1312 of the first motor and welded to it. The drive shaft 1312 of the first motor is passed through the first through hole 13151 on the swing arm 1315. The first nut 1314 is sleeved on the first threaded section 13121 of the drive shaft 1312 of the first motor, thereby clamping and fixing the swing arm 1315. Then, one end of the telescopic member 132 is welded to the end of the swing arm 1315 away from the first motor 1311. Then, the bridge dismantling member 133 is welded to the end of the telescopic member 132 away from the swing arm 1315. Then, the first motor 1311 is welded to the front plate surface of the second upright plate 112.

[0060] Combination Figure 1 and Figure 2 In some embodiments, there are two support mechanisms 140, which are arranged side by side. The arrangement direction of the two support mechanisms 140 is horizontal and perpendicular to the front-back direction. The angle between the two support mechanisms 140 is adjustable. By adjusting the angle between the two support mechanisms 140, the device can be made more stable and the risk of tipping over can be reduced.

[0061] Specifically, the support mechanism 140 includes a second rotation drive assembly 141 disposed on the bracket 110 and a support assembly 142 drivenly connected to the second rotation drive assembly 141; wherein, the second rotation drive assembly 141 is used to drive the support assembly 142 to rotate on the horizontal plane.

[0062] The second rotation drive assembly 141 is fixed to the rear plate surface of the first upright plate 111. The second rotation drive assembly 141 can drive the support leg assembly 142 to rotate on the horizontal plane, thereby adjusting the angle of the support leg assembly 142.

[0063] More specifically, the second rotary drive assembly 141 includes a second motor 1411 mounted on the bracket 110, and a foot assembly 142 connected to the drive shaft 1412 of the second motor.

[0064] The support leg assembly 142 includes a support leg 1421 that is driven to be connected to the second rotation drive assembly 141, and a roller 1422 disposed at the bottom of the support leg 1421.

[0065] Specifically, the drive shaft 1412 of the second motor is arranged vertically, and the support 1421 includes a horizontal support rod and a vertical support rod. One end of the horizontal support rod is connected to the drive shaft 1412 of the second motor, and the vertical support rod is connected to the other end of the horizontal support rod. The vertical support rod extends downward from the other end of the horizontal support rod, and the roller 1422 is connected to the bottom of the vertical support rod.

[0066] Combination Figure 1 and Figure 8The second motor drive shaft 1412 is fitted with a second fixing ring 1413, and one end of the transverse support rod is provided with a second through hole 14211 for the second motor drive shaft 1412 to pass through. The second motor drive shaft 1412 has a second threaded section, and a second nut 1414 is fitted onto the second threaded section. One end of the transverse support rod is clamped and fixed between the second fixing ring 1413 and the second nut 1414.

[0067] The specific installation method of the support mechanism 140 in the above embodiment is as follows:

[0068] The second fixing ring 1413 is sleeved on the drive shaft 1412 of the second motor and welded to it. The drive shaft 1412 of the second motor is passed through the second through hole 14211 of the support leg 1421, and the second nut 1414 is sleeved on the second threaded section of the drive shaft 1412 of the second motor, thereby clamping and fixing the support leg 1421. Then the roller 1422 is connected to the bottom of the support leg 1421. After that, the second motor 1411 is welded to the rear plate surface of the first upright plate 111.

[0069] In the multi-stage energy-dissipating bridge demolition protection collaborative system of this utility model, the bridge demolition mechanism 130 is installed on the bracket 110. The bridge demolition mechanism 130 can dismantle the bridge 200. Since the bridge demolition mechanism 130 is located in front of the multi-stage energy-dissipating plate assembly 120, when the bridge 200 is dismantled by the bridge demolition mechanism, the material generated by the bridge 200 being broken splashes onto the multi-stage energy-dissipating plate assembly 120. The multi-stage energy-dissipating plate assembly 120 can block the material, playing a role in buffering and dissipating the impact energy of the material. This protects people or objects behind the multi-stage energy-dissipating plate assembly 120 and reduces the risk of damage to relevant personnel and objects. In addition, the support mechanism 140, mounted on the bracket 110, provides support for the entire device, improving its stability and reducing the risk of overturning during operation. Furthermore, since the support mechanism 140 is located behind the multi-stage energy-dissipating plate assembly 120, the assembly can prevent flying debris from the bridge 200 during dismantling from impacting the support mechanism 140. In this multi-stage energy-dissipating bridge demolition protection system, by integrating the bridge demolition mechanism 130 and the multi-stage energy-dissipating plate assembly 120, the device can be used alone when dismantling the bridge 200, eliminating the need for separate protective plates on the bridge 200. This effectively saves on installation procedures and reduces the workload of workers.

[0070] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0071] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A multi-level energy-consuming bridge demolition protection collaborative system, characterized in that, include: support; A multi-stage energy-consuming panel assembly is mounted on the bracket; A bridge dismantling mechanism is connected to the support and located in front of the multi-stage energy-consuming panel assembly; The support mechanism is connected to the bracket and located behind the multi-stage energy dissipation board assembly.

2. The multi-level energy-consuming bridge demolition protection collaborative system according to claim 1, characterized in that, The multi-level energy-consuming board assembly includes multiple energy-consuming boards arranged sequentially from back to front.

3. The multi-level energy-consuming bridge demolition protection collaborative system according to claim 1, characterized in that, The multi-level energy-consuming board assembly includes a first energy-consuming board, a second energy-consuming board, a third energy-consuming board, and a fourth energy-consuming board arranged sequentially from back to front; The first energy-consuming board has multiple V-shaped structures arranged in parallel, the third energy-consuming board is a noise-reducing board, and the fourth energy-consuming board is an energy-absorbing board.

4. The multi-level energy-consuming bridge demolition protection collaborative system according to claim 1, characterized in that, The support includes a first upright plate, and the multi-stage energy-consuming plate assembly is fixed to the front surface of the first upright plate.

5. The multi-level energy-consuming bridge demolition protection collaborative system according to claim 1, characterized in that, The bridge demolition mechanism includes a first rotary drive assembly mounted on the support, a telescopic component driven and connected to the first rotary drive assembly, and a bridge demolition component connected to the telescopic component. The first rotation drive assembly is used to drive the telescopic member to rotate on a horizontal plane, and the telescopic member can drive the bridge dismantling member to translate in the horizontal direction.

6. The multi-level energy-consuming bridge demolition protection collaborative system according to claim 5, characterized in that, The first rotation drive assembly includes a first motor mounted on the bracket, a swing arm connected to the drive shaft of the first motor, and one end of the telescopic member connected to the swing arm.

7. The multi-level energy-consuming bridge demolition protection collaborative system according to claim 1, characterized in that, The number of the support mechanisms is two, and the two support mechanisms are arranged side by side. The arrangement direction of the two support mechanisms is horizontal and perpendicular to the front-back direction, and the angle between the two support mechanisms is adjustable.

8. The multi-level energy-consuming bridge demolition protection collaborative system according to claim 7, characterized in that, The support mechanism includes a second rotation drive assembly disposed on the bracket, and a support assembly that is driven and connected to the second rotation drive assembly; The second rotation drive component is used to drive the support leg assembly to rotate on the horizontal plane.

9. The multi-level energy-consuming bridge demolition protection collaborative system according to claim 8, characterized in that, The second rotation drive assembly includes a second motor mounted on the bracket, and the support leg assembly is connected to the drive shaft of the second motor.

10. The multi-level energy-consuming bridge demolition protection collaborative system according to claim 8, characterized in that, The support leg assembly includes a support leg that is driven and connected to the second rotary drive assembly, and a roller disposed at the bottom of the support leg.

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