Truss measuring tool

Abstract

The utility model discloses a truss measuring tool, the tool of the present application can be stably arranged at both ends of the truss through the first clamping portion and the second clamping portion on the first support rod and the second support rod, the winch pull rope on the first support rod is fixed at the hanging hole of the second support rod after the first pulley and the second pulley, and is erected in the middle part of the truss, forming the clear intermediate reference line. The vertical rope hung on the pull rope is in the vertical state under the action of the gravity block, which can accurately provide positioning reference for the truss installation, effectively solves the problem that the two side main chord rods may not be completely parallel and curved, which is difficult to accurately measure and position, and improves the precision of the truss installation. With the help of the vertical rope and the gravity block, the operator can conveniently measure the distance from each point on the two side main chord rods of the truss to the vertical rope, compared with the traditional measurement method relying on complex measuring instruments and manual experience, the operation is more simple and convenient, and the measurement efficiency is significantly improved.

Description

Technical Field

[0001] This utility model relates to the field of truss manufacturing, and specifically to a truss measuring fixture. Background Technology

[0002] Trusses are typically composed of multiple members connected by welding, bolting, or other methods, and are often quite long. In actual manufacturing and installation, due to limitations in processing technology, material properties, installation precision, and other factors, it is difficult to ensure that the main chords on both sides of the truss are perfectly parallel, often resulting in varying degrees of bending.

[0003] Trusses are typically composed of multiple members connected by welding, bolting, or other methods, and are often quite long. In actual manufacturing and installation, due to limitations in processing technology, material properties, installation precision, and other factors, it is difficult to ensure that the main chords on both sides of the truss are perfectly parallel, often resulting in varying degrees of bending.

[0004] To ensure the accuracy and quality of truss installation, precise measurement and adjustment of the truss's shape and position are necessary during the installation process. For example, some methods may require multi-point measurements using equipment such as theodolites and levels. This not only demands skilled technicians but is also susceptible to environmental interference, leading to significant errors in the measurement results. Therefore, a convenient and efficient device is needed to improve the installation accuracy and quality of the truss, ensuring the safe and stable operation of the project. Utility Model Content

[0005] To address the aforementioned problems, this utility model discloses a truss measuring fixture.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a truss measuring fixture, comprising a first support rod and a second support rod, wherein one end of the first support rod is provided with a first clamping part, and the other end is rotatably provided with a first pulley, and a winch is provided on the first support rod, with a pull rope wound on the winch; one end of the second support rod is provided with a second clamping part, and the other end is rotatably provided with a second pulley, and a hanging hole for fixing the pull rope is provided on the second support rod;

[0007] During operation, the first support rod and the second support rod are respectively set at both ends of the truss through the first clamping part and the second clamping part. The pull rope of the winch is fixed at the hanging hole after passing through the first pulley and the second pulley, and is erected in the middle of the truss. A plumb rope is suspended on the pull rope. The top end of the plumb rope is slidably sleeved on the pull rope. The bottom end of the plumb rope is connected to a gravity block, and the plumb rope is tightened by the gravity block.

[0008] In the above scheme, both the first clamping part and the second clamping part include a slot. The lower end of the slot is rotatably connected to a locking screw. When clamping, the end of the truss is inserted into the slot, and the locking screw is tightened so that its end abuts against the truss to achieve clamping and fixing.

[0009] In the above scheme, the card slot is located on the crossbar, and there are two of them, with the two card slots located at the two ends of the crossbar respectively.

[0010] In the above scheme, the first pulley is rotatably mounted on the first support rod via a first rotating shaft. A first synchronous pulley is provided on the first rotating shaft, and a second synchronous pulley is rotatably provided on the first support rod corresponding to the lower side of the first synchronous pulley. A first synchronous belt is sleeved between the first synchronous pulley and the second synchronous pulley. The second pulley is rotatably mounted on the second support rod via a second rotating shaft. A third synchronous pulley is provided on the second rotating shaft, and a fourth synchronous pulley is rotatably provided on the second support rod corresponding to the lower side of the third synchronous pulley. A second synchronous belt is sleeved between the third synchronous pulley and the fourth synchronous pulley.

[0011] The beneficial effects of this utility model are as follows: The tooling of this application can be stably set at both ends of the truss through the first clamping part and the second clamping part on the first and second support rods. The winch rope on the first support rod is fixed to the hanging hole of the second support rod after passing through the first pulley and the second pulley, and is erected in the middle of the truss, forming a clear intermediate reference line. The plumb rope suspended on the pull rope is in a vertical state under the action of the gravity block, which can accurately provide a positioning reference for the truss installation. It effectively solves the problem that the main chords on both sides may not be completely parallel or bent due to the long length of the truss, making it difficult to accurately measure and position, thus improving the accuracy of truss installation. With the help of the plumb rope and gravity block, the operator can easily measure the distance from each point on the main chords on both sides of the truss to the plumb rope. Compared with the traditional measurement method that relies on complex measuring instruments and manual experience, the operation is simpler and the measurement efficiency is significantly improved. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a conventional multi-point discharge elevator structure in the embodiments of this application;

[0013] Figure 2 This is a schematic diagram showing the locations of multiple discharge ports in an embodiment of this application;

[0014] Figure 3 This is a schematic diagram of the structure of the buffer in the embodiments of this application;

[0015] Figure 4 This is a schematic diagram of the structure of the paddle in the embodiments of this application;

[0016] Figure 5 This is a schematic diagram of the discharge port structure in an embodiment of this application. Detailed Implementation

[0017] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0018] Example 1: A truss measuring fixture includes a first support rod 110 and a second support rod 120. One end of the first support rod 110 is provided with a first clamping part 111, and the other end is rotatably provided with a first pulley 112. A winch 113 is provided on the first support rod 110, and a pull rope 114 is wound on the winch 113. One end of the second support rod 120 is provided with a second clamping part 121, and the other end is rotatably provided with a second pulley 122. The second support rod 120 is provided with a hanging hole 123 for fixing the pull rope 114. The first clamping part 111 and the second support rod 120 are used to fix the first support rod to one end of the truss, serving as a connection and positioning function.

[0019] During operation, the first support rod 110 and the second support rod 120 are respectively positioned at both ends of the truss 200 via the first clamping part 111 and the second clamping part 121. The pull rope 114 of the winch 113 is fixed at the hanging hole 123 after passing through the first pulley 112 and the second pulley 122, and is erected in the middle of the truss 200. A hanging rope 115 is suspended from the pull rope 114. The top end of the hanging rope 115 is slidably sleeved on the pull rope 114, and the bottom end of the hanging rope 115 is connected to a gravity block 116, which tightens the hanging rope 115. The rotatable design of the first pulley 112 and the second pulley 122 allows the pull rope 114 to slide smoothly when passing through them, reducing frictional resistance.

[0020] The bottom end of the plumb line 115 is connected to a gravity block 116. The function of the gravity block is to tighten the plumb line 115 with its own weight, so that the plumb line remains vertical under the action of gravity, thereby providing a vertical reference line for subsequent measurement and adjustment.

[0021] The winch 113 is used to wind up and unwind the pull rope 114. The tension of the pull rope can be adjusted by rotating the winch. The pull rope 114 is wound around the winch 113 and is the connecting component that realizes the function of the fixing mechanism. The winch 113 includes a drum for winding the pull rope, with a textured surface to prevent slippage; existing structures can be used. Various drive devices are available, including a manual crank, an electric motor with a reduction gear, or a hydraulic drive. A braking mechanism is provided, including mechanical, electromagnetic, and manual release devices. Manual or electric winches often include a gear transmission system composed of wear-resistant alloy steel gears. The winch is fixed to the first support rod 110 via a metal mounting bracket. Electric winches also have control switches and a circuit system with protective functions.

[0022] During the truss manufacturing process, the first support rod 110 and the second support rod 120 are fixed at the exact midpoint of both ends of the truss using the first clamping part 111 and the second clamping part 121 respectively (installed after accurate measurement). At this time, the pull rope 114 is released from the winch 113, inserted into the first pulley 112, and then fixed at the hanging hole 123 after passing through the first pulley 112 and the second pulley 122 and tightened. Since the first support rod 110 and the second support rod 120 are located at the midpoint of both ends of the truss, the position of the pull rope 114 after being tightened also corresponds to the middle of the truss 200. At this time, there is a midpoint reference line of the pull rope 114 on the truss, and the corresponding plumb line 115 is set on the pull rope 114. Its bottom is subjected to the tension of the gravity block 116 and is perpendicular to the pull rope 114, forming a vertical reference line. Next, the distances from each point on the main chords on both sides of the truss to the plumb rope 115 are measured and recorded. If the distances on both sides are not equal, a process of heating is required to push the rope inward or outward until the distances from the center point to both sides are equal and within the required range. The top of the plumb rope is slidably fitted onto the tension rope 114, allowing it to slide freely on the tension rope. Therefore, the distances at each point can be measured step by step by sliding the tension rope 114 along the length of the truss.

[0023] In one possible implementation, both the first clamping part 111 and the second clamping part 121 include a slot 130. The lower end of the slot 130 is rotatably connected to a locking screw 131. When clamping, the end of the truss 200 is inserted into the slot 130, and the locking screw 131 is tightened so that its end abuts against the truss 200 to achieve clamping and fixing.

[0024] The function of the slot 130 is to provide a accommodating space for the end of the truss 200, so as to facilitate the placement of the truss end there, and play a role in initial positioning and restricting the movement of the truss within a certain range.

[0025] The lower end of the locking screw 131 is rotatably connected to the slot 130. The locking screw 131 can rotate around the connection point, and its position and state can be adjusted by rotating the screw.

[0026] During the clamping operation, the end of the truss 200 is inserted into the slot 130. The size and shape of the slot 130 are designed according to the shape of the end of the truss 200 to ensure that the end of the truss can be accurately placed into the slot, completing the initial position fixation. Then, the locking screw 131 is tightened using a tool (such as a wrench). As the screw rotates, its end gradually moves closer to the truss 200 and eventually abuts against the truss 200. In this process, the screw generates an axial force, which acts on the truss, creating sufficient friction between the truss and the slot, thereby firmly fixing the truss in the slot and achieving a secure clamping of the truss end.

[0027] Furthermore, two slots 130 are located on the crossbar 140, one at each end of the crossbar 140. With the two slots 130 at each end of the crossbar 140, when the end of the truss 200 engages with the slot 130, the crossbar 140 can distribute and transmit the force from the truss. Compared to a single slot design, the structure where the slots at both ends are connected by the crossbar better resists external forces, reduces swaying or displacement caused by uneven force distribution, and makes the connection between the first support rod 110 and the second support rod 120 and the truss 200 more stable, ensuring the stability of the fixing mechanism during operation.

[0028] Example 2: A first pulley 112 is rotatably mounted on a first support rod 110 via a first rotating shaft 117. A first synchronous pulley 118 is provided on the first rotating shaft 117. A second synchronous pulley 119 is rotatably provided on the first support rod 110 corresponding to the lower side of the first synchronous pulley 118. A first synchronous belt 150 is sleeved between the first synchronous pulley 118 and the second synchronous pulley 119. A second pulley 122 is rotatably mounted on a second support rod 120 via a second rotating shaft 124. A third synchronous pulley 125 is provided on the second rotating shaft 124. A fourth synchronous pulley 126 is rotatably provided on the second support rod 120 corresponding to the lower side of the third synchronous pulley 125. A second synchronous belt 151 is sleeved between the third synchronous pulley 125 and the fourth synchronous pulley 126.

[0029] In this embodiment, the first pulley 112 is coaxially connected to the first synchronous pulley 118 via the first rotating shaft 117, and the second synchronous pulley 119 is linked to the first synchronous pulley 118 via the first synchronous belt 150; similarly, the second pulley 122 is coaxially connected to the third synchronous pulley 125 via the second rotating shaft 124, and the fourth synchronous pulley 126 is linked to the third synchronous pulley 125 via the second synchronous belt 151.

[0030] When the tension of the pull rope 114 needs to be adjusted, the first synchronous pulley 118 or the third synchronous pulley 125 can be rotated by driving the second synchronous pulley 119 or the fourth synchronous pulley 126 (such as a manual knob or a micro motor) using the transmission action of the synchronous belt. Since the synchronous pulleys and pulleys are coaxial, the rotation of the pulleys will change the winding path or tension of the pull rope 114. For example, if the first synchronous pulley 118 rotates clockwise, the first pulley 112 will rotate synchronously, which may tighten the pull rope 114; conversely, it will loosen it. The synchronous pulley systems on both sides are independently controlled, and the tension at both ends of the pull rope can be adjusted separately to ensure that the pull rope is evenly tensioned in the middle of the truss and to avoid the deviation of the vertical rope 115 due to uneven tension on one side.

[0031] The winch 113 is responsible for coarse adjustment (initial tension) of the pull rope, while the synchronous pulley system is responsible for fine adjustment (such as eliminating slight slack or over-tightness). The combination of the two achieves more precise tension control. Through the precision of the synchronous pulley and synchronous belt drive, fine adjustment of the pull rope tension is achieved without affecting the overall structural stability.

[0032] It should be noted that the above content merely illustrates the technical concept of this utility model and cannot be used to limit the scope of protection of this utility model. For those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and all such improvements and modifications fall within the scope of protection of the claims of this utility model.

Claims

1. A truss measuring fixture, characterized in that: The device includes a first support rod (110) and a second support rod (120). One end of the first support rod (110) is provided with a first clamping part (111), and the other end is rotatably provided with a first pulley (112). A winch (113) is provided on the first support rod (110), and a pull rope (114) is wound on the winch (113). One end of the second support rod (120) is provided with a second clamping part (121), and the other end is rotatably provided with a second pulley (122). The second support rod (120) is provided with a hanging hole (123) for fixing the pull rope (114). During operation, the first support rod (110) and the second support rod (120) are respectively set at both ends of the truss (200) through the first clamping part (111) and the second clamping part (121). The pull rope (114) of the winch (113) is fixed at the hanging hole (123) after passing through the first pulley (112) and the second pulley (122), and is erected in the middle of the truss (200). A hanging rope (115) is suspended on the pull rope (114). The top end of the hanging rope (115) is slidably sleeved on the pull rope (114). The bottom end of the hanging rope (115) is connected to a gravity block (116), and the hanging rope (115) is tightened by the gravity block (116).

2. The tooling according to claim 1, characterized in that: Both the first clamping part (111) and the second clamping part (121) include a slot (130). The lower end of the slot (130) is rotatably connected to a locking screw (131). When clamping, the end of the truss (200) is inserted into the slot (130). By tightening the locking screw (131), the end of the truss (200) is pressed against the truss (200) to achieve clamping and fixing.

3. The tooling according to claim 2, characterized in that: The slots (130) are located on the crossbar (140), and there are two of them, with the two slots (130) located at the two ends of the crossbar (140).

4. The tooling according to claim 1, characterized in that: The first pulley (112) is rotatably mounted on the first support rod (110) via the first rotating shaft (117). A first synchronous pulley (118) is provided on the first rotating shaft (117). A second synchronous pulley (119) is rotatably provided on the first support rod (110) corresponding to the lower side of the first synchronous pulley (118). A first synchronous belt (150) is sleeved between the first synchronous pulley (118) and the second synchronous pulley (119). The second pulley (122) is rotatably mounted on the second support rod (120) via the second rotating shaft (124). A third synchronous pulley (125) is provided on the second rotating shaft (124). A fourth synchronous pulley (126) is rotatably provided on the second support rod (120) corresponding to the lower side of the third synchronous pulley (125). A second synchronous belt (151) is sleeved between the third synchronous pulley (125) and the fourth synchronous pulley (126).

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