Sectional type guide rail perpendicularity measuring plumb bob

Abstract

The utility model discloses a sectional type guide rail perpendicularity measuring plumb bob in the technical field of guide rail perpendicularity measurement, which comprises a bracket and a magnet arranged on the bracket, and further comprises a plumb bob box, the plumb bob box is rotationally connected with a wire coil wheel through a bearing, and a vertical line fixed with the bracket is wound on the wire coil wheel; the ratchet wheel is fixedly connected to the wire coil wheel in a sleeving mode, the wire plummet box is rotationally connected with a pawl used in cooperation with the ratchet wheel, a first spring is fixed between the pawl and the wire plummet box, and the wire plummet box is slidably connected with an adjusting rod used for extruding the pawl to rotate. The ratchet wheel-pawl mechanism replaces a traditional spring, the elastic force of the spring does not need to be overcome in the process of pulling the plumb bob box, the plumb line can be freely collected and released in the pulling process, the jamming risk is avoided, and safety and reliability are improved.

Description

Technical Field

[0001] This utility model relates to the field of guide rail verticality measurement technology, specifically to a segmented guide rail verticality measurement plumb line. Background Technology

[0002] The verticality of elevator guide rails is one of the key parameters to ensure the safe and stable operation of elevators. Excessive verticality deviation can lead to vibration, noise, abnormal wear of guide shoes, and even safety accidents during elevator operation.

[0003] Commonly used measuring tools include a magnetic plumb bob with a movable tip. Its structure consists of a plumb bob box, a magnet mounted on the box, and a plumb line. The plumb line is held in place by a return spring within the plumb bob box, achieving an integrated design. In use, the plumb bob box is first attracted to the guide rail surface by the magnet. The plumb line then needs to be pulled out of the box, overcoming the force of the return spring. This measuring tool has three drawbacks: (1) Since the resetting of the plumb line requires the reverse force of the coil spring, the longer the plumb line is pulled out, the greater the force generated by the coil spring, and the plumb line is easily pulled off. The length of the plumb line is limited. The length of the plumb line used is only 5 meters, and it can only measure 5 meters of guide rail length at a time, which greatly reduces the measurement accuracy; (2) Since the magnetic force of the magnet is used to attract the plumb box to the guide rail surface, the contact area between the magnet and the guide rail is small, and the magnetic force generated is limited and the fixation is unreliable. During use, it is easy to be pulled off the guide rail when the line is pulled out, which will cause the plumb line to break or damage the elevator parts, and may even injure the workers and cause a safety accident; (3) During use, the coil spring is prone to failure or mechanical jamming, which will cause the pulled-out plumb line to be unable to be returned to the box or the plumb line to be unable to be pulled out and thus cannot be used. Obviously, the reliability is low. Utility Model Content

[0004] The present invention aims to provide a segmented guide rail plumb bob for measuring verticality, so as to improve the reliability of the plumb bob during use.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A segmented guide rail verticality measuring plumb bob includes a bracket and a magnet mounted on the bracket, and a plumb bob box. The plumb bob box is rotatably connected to a reel via a bearing. The reel is wound with a vertical line fixed to the bracket. The plumb bob box also includes a ratchet fixedly sleeved on the reel. The plumb bob box is rotatably connected to a pawl that cooperates with the ratchet. A first spring is fixed between the pawl and the plumb bob box. The plumb bob box is slidably connected to an adjusting rod for squeezing the pawl to cause it to rotate.

[0007] The working principle and beneficial effects of this utility model:

[0008] The bracket is attached to the guide rail surface to be measured using a magnet, and the plumb bob box is suspended upwards by the bracket. When it is time to release the plumb line, press the adjusting rod to slide and squeeze the pawl. The pawl rotates and disengages from the ratchet, compressing the first spring. Keep the adjusting rod pressed down, and simply press and pull the plumb bob box. The plumb wheel rotates to release the line. Once the plumb line reaches the appropriate length, release the adjusting rod. The first spring returns, causing the pawl to rotate toward the ratchet and lock. At this point, the plumb wheel is locked to prevent the plumb line from retracting. The length of the plumb line remains constant, and the measurement work can begin.

[0009] This application replaces the traditional coil spring with a ratchet-pawl mechanism, eliminating the need to overcome the spring force during the pulling of the plumb bob box. The pulling process allows the plumb line to be freely extended and retracted without the risk of jamming. The magnet and plumb box are designed in sections, eliminating the need for a large pulling force to overcome the coil spring as required in existing technologies during measurement. This prevents the magnet and support from falling, improving safety and reliability. It is especially suitable for high-precision vertical inspection scenarios such as elevator guide rails.

[0010] In some embodiments, the bracket has a U-shaped groove for accommodating the guide rail, and the magnet is fixedly disposed inside the groove. By surrounding the guide rail with the groove, the contact area between the magnet and the guide rail is increased, thereby enhancing the adsorption force.

[0011] In some embodiments, the groove is threaded with a top cone. When the guide rail is located in the groove, the top cone is screwed in to hold the guide rail in place, and the combination of magnets and the top cone provides a double fixing effect, preventing the bracket from falling off.

[0012] In some embodiments, the spool is fixedly equipped with a take-up handle. The spool is rotated by turning the take-up handle to drive the spool to rotate and take in the line.

[0013] In some embodiments, the plumb bob box is fixedly connected to a plumb bob handle. By holding the plumb bob handle, the plumb bob box can be easily moved to release the line.

[0014] In some embodiments, the adjusting rod is fixedly equipped with a pressing plate. The pressing plate presses against the pawl, causing it to rotate.

[0015] In some embodiments, the adjusting rod is sleeved with a second spring. The second spring is used to limit the movement of the adjusting rod. Attached Figure Description

[0016] Figure 1 This is a scenario diagram illustrating the use of a segmented guide rail verticality measuring plumb line in this application;

[0017] Figure 2 This is a schematic diagram of the structure of a segmented guide rail verticality measuring plumb line according to this application;

[0018] Figure 3 for Figure 1Schematic diagram of the connection between the middle bracket and the guide rail;

[0019] Figure 4 for Figure 2 A schematic diagram of the internal structure in the left view;

[0020] Figure 5 for Figure 4 A schematic diagram of the structure after the middle pawl disengages from the ratchet;

[0021] Figure 6 for Figure 2 The right view. Detailed Implementation

[0022] The following detailed description illustrates the specific implementation method:

[0023] The reference numerals in the accompanying drawings include: 1. Plumb bob handle; 2. Take-up crank; 3. Bearing; 4. Plumb bob box; 5. Plumb line; 6. Bracket; 7. Guide rail; 8. Top cone; 9. Magnet; 10. Ratchet; 11. Adjusting rod; 12. Pawl; 13. Second spring; 14. First spring; 15.

[0024] In the following statements, directional terms such as "left," "right," "up," and "down" are based on the directions shown in the diagram. In practice, if the corresponding structures are changed in the same direction based on the direction while maintaining their relative positions, it will not affect the implementation of the plan.

[0025] Example: A segmented guide rail verticality measuring plumb bob, such as... Figure 3 As shown, the bracket 7 is provided with a groove. Magnets 10 are fixedly provided on the inner sidewalls of the left and rear sides of the groove. The right side of the bracket 7 is also provided with a threaded hole communicating with the groove. A top cone 9 is threadedly connected to the threaded hole.

[0026] like Figure 2 , Figure 4 and Figure 6 As shown, it also includes a plumb bob box 5, which is equipped with a bearing 3. A spool wheel 4 is mounted on the bearing 3, thereby enabling the spool wheel 4 to rotate. A vertical line 6 fixed to the bracket 7 is wound on the spool wheel 4. A take-up handle 2 is fixedly mounted on the spool wheel 4. A plumb bob handle 1 is fixedly connected to the bottom of the plumb bob box 5. It also includes a ratchet 11 fixedly sleeved on the spool wheel 4. A pawl 13 that cooperates with the ratchet 11 is rotatably connected to the plumb bob box 5. A first spring 15 is fixed between the pawl 13 and the plumb bob box 5. An adjusting rod 12 for squeezing the pawl 13 to cause it to rotate is slidably connected to the plumb bob box 5. A second spring 14 is fixed between the adjusting rod 12 and the plumb bob box 5.

[0027] like Figure 1 As shown, the bracket 7 is attached to the guide rail 8 whose verticality is to be measured by the magnet 10, and then the top cone 9 is tightened to hold the guide rail 8 in place, thus fixing the bracket 7. The bracket 7 then suspends the plumb box 5 upwards. Figure 5 As shown, when the plumb line 6 needs to be released, one hand presses the adjusting rod 12 and slides it to the left, squeezing the pawl 13 and the second spring 14. The adjusting rod 12 pushes the pawl 13 to rotate and disengage from the ratchet 11. The pawl 13 compresses the first spring 15. While keeping the adjusting rod 12 pressed, the other hand holds the plumb bob handle 1 and pulls the plumb bob box 5 downwards. The spool wheel 4 loses the pawl 13's restraint and rotates to release the line. Once the plumb line 6 reaches the appropriate length, the adjusting rod 12 is released. The second spring 14 returns the adjusting rod 12 and springs outwards. The first spring 15 causes the pawl 13 to rotate toward the ratchet 11 to lock it. At this point, the spool wheel 4 is locked to prevent the plumb line 6 from retracting. The length of the plumb line 6 remains unchanged, and the measurement work begins. After the measurement is completed, the spool wheel 4 is rotated in the opposite direction by rotating the take-up handle 2 to take back the plumb line 6. The top cone 9 is then loosened to remove the bracket 7.

[0028] This application replaces the existing technology of using a coil spring to limit the vertical line 6 by using a ratchet 11 and a pawl 13. During the pulling process, the vertical line 6 can be freely extended and retracted without the risk of jamming. The magnet 10 and the plumb box 5 are designed in sections, so that no large pulling force is generated on the magnet 10 and the bracket 7 during the measurement process. The magnet 10 and the top cone 9 are used to achieve a double fixing effect, which prevents the bracket 7 from falling off and improves safety and reliability. It is especially suitable for high-precision vertical detection scenarios such as elevator guide rails 8.

[0029] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

Claims

1. A segmented rail plumb bob for measuring the perpendicularity of a rail, comprising a support and a magnet mounted on the support, characterized in that: The line weight box is rotationally connected with a line disc wheel through a bearing, the line disc wheel is wound with a plumb line fixed with the support; the line weight box is rotationally connected with a ratchet pawl used in cooperation with the ratchet wheel, a first spring is fixed between the ratchet pawl and the line weight box, and the line weight box is slidingly connected with an adjusting rod used for extruding the ratchet pawl to rotate.

2. The segmented rail plumb bob of claim 1, wherein: The support is provided with a U-shaped groove for accommodating the guide rail, and the magnet is fixedly arranged on the inner side of the groove.

3. The segmented rail plumb bob of claim 2, wherein: The groove is screw-connected with a top cone.

4. The segmented rail plumb bob of claim 3, wherein: The line disc wheel is fixedly provided with a winding crank.

5. A segmented rail plumb bob as claimed in any one of claims 1 to 4, wherein: The line weight box is fixedly connected with a line weight handle.

6. The segmented rail plumb bob of claim 5, wherein: The adjusting rod is fixedly provided with an extrusion plate.

7. The segmented rail plumb bob of claim 6, wherein: The adjusting rod is sleeved with a second spring.

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