Elevator landing door gap force application measuring instrument

Abstract

The utility model relates to the technical field of testing equipment, in particular to an elevator landing door gap force application measuring instrument, which is characterized in that during actual measurement application, the head of a wedge-shaped head is inserted into a position close to a sill in a door slot gap, the landing door gap is increased by continuously and deeply inserting, and the door climbing resistance is increased while the landing door gap is increased; the door climbing resistance is transmitted to the host through the force sensor and is displayed through the display screen module. And when the door climbing resistance displayed by the display screen module is a 150N required value, the door climbing gap formed when the landing door is opened is the door climbing gap formed when 150N door climbing force is applied to the most unfavorable point of the landing door. The elevator landing door gap force application measuring instrument is simple in structure, convenient to operate and measure, visual and reliable in data, completely suitable for detection and judgment of technical indexes required in the standard, and high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of testing equipment, in particular to an elevator landing door gap force application measuring instrument. Background Art

[0002] During the elevator manufacturing or inspection process, it is necessary to follow the national standard GB / T7588.1-2020 "Safety Rules for the Construction and Installation of Lifts - Part 1: Passenger and Goods Lifts". This standard states that for horizontal sliding landing doors and folding landing doors, when a force of 150 N is applied by hand at the most unfavorable point in the opening direction of the fastest moving door leaf, the gap of the center-opening door shall not exceed 45 mm, and the gap of the side-opening door shall not exceed 30 mm.

[0003] Currently, for the detection of the above technical standards, the application of the door climbing force still relies on manual experience and feel, resulting in large fluctuations in the detection data and unreliable detected gaps. There is an urgent need to provide a solution. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides an elevator landing door gap force application measuring instrument with a simple structure, convenient operation, convenient measurement, and intuitive and reliable data.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] The utility model provides an elevator landing door gap force application measuring instrument, including a measuring head and a main body;

[0007] The main body includes a main body housing, a force sensor installed in the main body housing, and a display module arranged on the main body housing;

[0008] The measuring head includes a wedge head connected to the force sensor. The two sides of the wedge head are symmetrically provided with a first wedge surface and a second wedge surface. The first wedge surface and the second wedge surface form a wedge angle β, and the wedge angle β is less than 180°.

[0009] Preferably, the wedge angle β is 45° to 53°.

[0010] Wherein, the measuring head further includes a sliding frame movably arranged on the wedge head and a displacement sensor arranged on the sliding frame. The displacement sensor is communicatively connected to the main body.

[0011] Wherein, the displacement sensor adopts a grating card displacement sensor.

[0012] Wherein, the wedge head is provided with a sliding groove extending from the head to the tail, the sliding frame is provided with a slider, and the sliding frame and the displacement sensor are slidably installed on the sliding groove by the slider.

[0013] Among them, the sliding carriage includes an upper carriage member and a lower carriage member connected to the upper carriage member. The slider is installed between the upper carriage member and the lower carriage member, and the displacement sensor is installed on the upper carriage member.

[0014] Among them, first alignment and installation parts are provided at both ends of the upper carriage member, and second alignment and installation parts that are aligned and installed with the first alignment and installation parts are provided at both ends of the lower carriage member.

[0015] Among them, the displacement sensor, the upper carriage member, the slider and the lower carriage member are locked and connected by first screws;

[0016] After the first alignment and installation part and the second alignment and installation part are aligned and installed, they are locked and connected by second screws.

[0017] Preferably, scales are provided on the upper carriage member and / or the lower carriage member.

[0018] Among them, a battery compartment is provided inside the main body housing, and a key area is also provided on the main body housing.

[0019] Advantages of the present utility model:

[0020] The present utility model provides a force application measurement instrument for elevator landing door gaps. During actual measurement and application, the head of the wedge-shaped head is inserted into the gap of the door leaf near the landing sill. This position is the "most unfavorable point" referred to in the national standard GB / T7588.1-2020. Continuously insert it deeper to increase the landing door gap. As the landing door gap increases, the climbing door resistance also increases. The climbing door resistance is transmitted to the main body through the force sensor and displayed through the display screen module. When the climbing door resistance displayed on the display screen module reaches the required value of 150N, the climbing door gap when the landing door is opened at this time is the climbing door gap when a 150N climbing door force is applied at the most unfavorable point of the landing door. It is judged to meet the requirement if the indicated value of the center-opening door is ≤ 45mm or the indicated value of the side-opening door is ≤ 30mm, otherwise it does not meet the requirement. The structure of this elevator landing door gap force application measurement instrument is simple, the operation is convenient, the measurement is convenient, the data is intuitive and reliable, and it fully meets the detection and judgment of the technical indicators required in the standard, and it has strong practicability. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the present utility model.

[0022] Figure 2 is a three-dimensional structural diagram of the present utility model.

[0023] Figure 3 is another three-dimensional structural diagram of the present utility model.

[0024] Figure 4 is an exploded structural diagram of the present utility model.

[0025] Figure 5 Schematic three-dimensional structure diagram of the displacement sensor and the moving frame of the present utility model. Figure 6 Schematic exploded structure diagram of the displacement sensor and the moving frame of the present utility model.

[0026] Figure 7 Another schematic exploded structure diagram of the displacement sensor and the moving frame of the present utility model. Figure 8 Schematic diagram of left and right climbing door force calibration of the present utility model.

[0027] Figure 9 Schematic diagram of the working principle of the present utility model. Detailed implementation manners

[0028] For the convenience of understanding by those skilled in the art, the present utility model will be further described below in conjunction with embodiments and the accompanying drawings. The content mentioned in the implementation manners does not limit the present utility model. The present utility model will be described in detail below with reference to the accompanying drawings.

[0029] Refer to Figures 1 to 7 As shown, the present utility model provides an elevator landing door gap force application measurement instrument, including a measuring head 1 and a main unit 2; the main unit 2 includes a main unit housing 21, a force sensor 22 installed in the main unit housing 21, and a display module 23 provided on the main unit housing 21; the measuring head 1 includes a wedge head 11 connected to the force sensor 22. On both sides of the wedge head 11, a first wedge surface 111 and a second wedge surface 112 are symmetrically arranged. The first wedge surface 111 and the second wedge surface 112 form a wedge angle β, and the wedge angle β is less than 180°.

[0030] In this embodiment, the effective measurement section working surfaces of the first wedge surface 111 and the second wedge surface 112 of the wedge head 11 are symmetrically arranged. Specifically, the wedge head 11 has a triangular block structure. The main unit 2 is provided with a control circuit board, which can be implemented by using a conventional PCB circuit, chips, etc., which belong to common technical means, so no further description will be given.

[0031] During actual measurement and application, insert the head of the wedge head 11 into the door gap near the sill position. This position is the "most unfavorable point" referred to in the national standard GB / T7588.1-2020. Continuously insert it deeper to increase the landing door gap. As the landing door gap increases, the climbing door resistance also increases. The climbing door resistance is transmitted to the main unit 2 through the force sensor 22 and displayed through the display module 23. When the climbing door resistance displayed by the display module 23 reaches the required value of 150N, the climbing door gap when the landing door is opened at this time is the climbing door gap when a 150N climbing door force is applied at the most unfavorable point of the landing door. It is judged to be compliant if the indicated value of the center-opening door ≤ 45mm or the indicated value of the side-opening door ≤ 30mm, otherwise it is non-compliant.

[0032] This elevator landing door gap force application measuring instrument is in contact with the landing door by arranging a first wedge surface 111 and a second wedge surface 112 which are symmetrically arranged on both sides of the wedge head 11, and setting the wedge angle β to be less than a set fixed angle within the range of 180°, so that the climbing door force of the landing door on the wedge head 11, that is, the climbing door resistance, is equal to the force applied when the head of the wedge head 11 is inserted into the door gap within the allowable error range, thereby quickly obtaining the climbing door gap when a 150N climbing door force is applied.

[0033] This elevator landing door gap force application measuring instrument has a simple structure, is convenient to operate, convenient to measure, the data is intuitive and reliable, and it is completely applicable to the detection and judgment of the technical indicators required in the standard, and it has strong practicability.

[0034] In this embodiment, the wedge angle β is 45° to 53°. Preferably, the β is 49.5°. Figure 8 It is a schematic diagram for left and right climbing door force calibration. As Figure 8 shown, a left climbing door force sensor and a right climbing door force sensor are arranged on both sides of the calibration groove of the calibration tooling to calibrate this elevator landing door gap force application measuring instrument.

[0035] During calibration, insert the head of the wedge head 11 between the left climbing door force sensor and the right climbing door force sensor and continuously insert it deeper to obtain the applied force F0, the climbing door force F1 of the left climbing door force sensor, and the climbing door force F2 of the right climbing door force sensor.

[0036] Figure 9 It is a schematic diagram of the working principle. As Figure 9 shown, the mechanical relationship among F1, F2, F0 and β is: F0 = (F1 + F2) × tan(β / 2) + f × (F1 + F2); where: f is the friction coefficient.

[0037] First, process a wedge head 11 with an appropriate initial angle of β0. The processing technology requirements of the wedge head 11 are heat-treated to ensure the hardness of the working inclined surface, and then the working inclined surface is ground and polished so that the friction coefficient f of the wedge head 11 remains stable during long-term repeated use. According to Figure 8 carry out calibration. After multiple calibration measurements, calculate the average values of F1, F2, and F0 respectively, and then calculate the friction coefficient f according to the mechanical relationship formula.

[0038] Let F1 = F2 = F0, then the wedge angle β of the wedge head 11 is: β = arctan(0.5 - f).

[0039] Then process a measuring head with a wedge angle of β, according to Figure 8Perform calibration, verify its accuracy through multiple calibration measurements, and calculate the differences △1 and △2 between the average values of F1 and F2 and the average value of F0, as well as the measurement uncertainties U1 and U2. When △1, △2, U1, and U2 do not reach the expected value of the allowable error MPE, finely adjust the wedge angle β until △1, △2, U1, and U2 reach the expected value. This angle is the shaped wedge angle of the measuring head.

[0040] In this embodiment, the calculation method of the uncertainty U is as follows:

[0041] 1. The results obtained by verifying its accuracy through n calibration measurements are: X1, X2... X n ;

[0042] 2. Measurement average value

[0043] 3. The uncertainty U with a coverage factor of 2 is:

[0044]

[0045] In this embodiment, the expected value MPE is an error range, which is set according to the precision requirements of the instrument and equipment. In the regulations or specifications of legal calibration or verification, the MPE of each instrument is specifically stipulated according to the precision of the instrument and equipment, and can be obtained by looking up the table according to the relevant regulations or specifications, so it will not be elaborated here.

[0046] The determination of whether △1, △2, U1, and U2 reach the expected value MPE should meet one of the following conditions:

[0047] Condition 1: △1 ≤ MPE, △2 ≤ MPE, U1 ≤ MPE / 3, U2 ≤ MPE / 3;

[0048] Condition 2: △1 ≤ MPE, △2 ≤ MPE, △1 + U1 ≤ MPE, △2 + U2 ≤ MPE.

[0049] Select β = 49.5°. After repeated calibration measurements for verification, the experimental data results are shown in the following table:

[0050] Table of calibration results of force application error

[0051]

[0052]

[0053] There are slight differences in the left and right errors between the climbing door force F1 of the left climbing door force sensor and the right climbing door force calibration F2; this may be caused by slight errors in the symmetric dimensions of the first wedge surface 111 and the second wedge surface 112 of the two working surfaces of the measuring head 1 during measurement operations or processing, as well as slight differences in the surface friction coefficient. The degree of these slight differences in left and right errors is completely acceptable and meets the measurement requirements.

[0054] In this embodiment, the measuring head 1 further includes a sliding frame 12 movably arranged on the wedge head 11 and a displacement sensor 13 arranged on the sliding frame 12. The displacement sensor 13 is communicatively connected to the host 2. Specifically, the displacement sensor 13 and the host 2 can adopt existing wired communication connections or wireless communication connections. This can be achieved by using existing sensor devices. Preferably, the displacement sensor 13 adopts a grating card reading displacement sensor.

[0055] During measurement, the head of the wedge head 11 is inserted into the gap of the door seam near the sill position. The larger the door seam, the deeper the insertion depth of the wedge head 11, and the sliding frame 12 drives the displacement sensor 13 to retreat; the amount of retreat is collected by the displacement sensor 13 on the sliding frame 12 and transmitted to the host 2. The host 2 converts the displacement amount of the sliding frame 12 into the size of the door seam gap. Specifically, the length of the wedge head 11 at the front end of the sliding frame 12 is the initial displacement. The displacement of the sliding frame 12 plus the initial displacement gives the total displacement. When the β angle is known, the size of the seam gap (i.e., the length of the base of the triangle) can be calculated using trigonometric relationships; and it is displayed through the display screen module 23, and the door seam gap when the force sensor 22 applies a force of 150 N is captured.

[0056] In this embodiment, the wedge head 11 is provided with a sliding groove 113 extending from the head to the tail. The sliding frame 12 is provided with a slider 121. The sliding frame 12 and the displacement sensor 13 are slidably installed in the sliding groove 113 by the slider 121. Using the installation structure of the slider 121 and the sliding groove 113, firstly, it is convenient for the installation and displacement measurement of the displacement sensor 13; secondly, the sliding frame 12 abuts against the door, and the sliding groove 113 guides the force application direction, making the force application directionality good and reducing the measurement error.

[0057] In this embodiment, the sliding frame 12 includes an upper frame member 122 and a lower frame member 123 connected to the upper frame member 122. The slider 121 is installed between the upper frame member 122 and the lower frame member 123. The displacement sensor 13 is installed on the upper frame member 122. The sliding frame 12 adopts a split assembly structure design, which is convenient for the installation and replacement of the displacement sensor 13.

[0058] In this embodiment, first alignment and installation parts 1221 are provided at both ends of the upper mounting part 122, and second alignment and installation parts 1231 which are used for fitting and installing with the first alignment and installation parts 1221 are provided at both ends of the lower mounting part 123, so that the upper mounting part 122 and the lower mounting part 123 can be quickly positioned and assembled, and there will be no relative sliding or misaligned rotation, making their connection reliable and the structure stable.

[0059] In this embodiment, the displacement sensor 13, the upper mounting part 122, the slider 121 and the lower mounting part 123 are tightly connected by a first screw 14; after the first alignment and installation part 1221 and the second alignment and installation part 1231 are fitted and installed, they are tightly connected by a second screw 15, and their installation and disassembly are convenient and the connection is reliable.

[0060] In this embodiment, scales are provided on the upper mounting part 122 and / or the lower mounting part 123, so that the gap between the door seams can be manually read, or the numbers read by the displacement sensor 13 can be verified through these scales.

[0061] In this embodiment, a battery compartment 24 is provided inside the main body housing 21, which is used for installing a power supply battery to facilitate power supply to the main body 2. A key area 25 is also provided on the main body housing 21 to facilitate the operation of the main body 2.

[0062] The above are only preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention is disclosed above in preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art, within the scope of the technical solution of the present invention, when making some changes or modifications to the above-disclosed technical content to form equivalent embodiments of equivalent changes, as long as the technical solution content of the present invention is not departed from, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention shall fall within the scope of the technical solution of the present invention.

Claims

1. An elevator landing door gap force application measuring instrument, characterized in that: It includes a measuring head (1) and a main unit (2); The main unit (2) includes a main unit housing (21), a force sensor (22) installed inside the main unit housing (21), and a display module (23) provided on the main unit housing (21); The measuring head (1) includes a wedge head (11) connected to the force sensor (22). On both sides of the wedge head (11), a first wedge surface (111) and a second wedge surface (112) are symmetrically arranged. The first wedge surface (111) and the second wedge surface (112) form a wedge angle β, and the wedge angle β is less than 180°.

2. The force application measuring instrument for elevator landing door clearance according to claim 1, characterized in that: The wedge angle β is 45° to 53°.

3. The force application measuring instrument for elevator landing door clearance according to claim 1, characterized in that: The measuring head (1) further includes a sliding frame (12) movably arranged on the wedge head (11) and a displacement sensor (13) provided on the sliding frame (12). The displacement sensor (13) is communicatively connected to the main unit (2).

4. The force application measuring instrument for elevator landing door clearance according to claim 3, characterized in that: The displacement sensor (13) uses grating card reading displacement sensing.

5. An elevator landing door gap force application measuring instrument according to claim 3, characterized in that: The wedge head (11) is provided with a sliding groove (113) extending from the head to the tail. The sliding frame (12) is provided with a slider (121). The sliding frame (12) and the displacement sensor (13) are slidably installed in the sliding groove (113) by means of the slider (121).

6. The force application measuring instrument for elevator landing door clearance according to claim 5, characterized in that: The sliding frame (12) includes an upper frame member (122) and a lower frame member (123) connected to the upper frame member (122). The slider (121) is installed between the upper frame member (122) and the lower frame member (123), and the displacement sensor (13) is installed on the upper frame member (122).

7. An elevator landing door gap force application measuring instrument according to claim 6, characterized in that: Both ends of the upper frame member (122) are provided with first alignment installation parts (1221), and both ends of the lower frame member (123) are provided with second alignment installation parts (1231) that are aligned and installed with the first alignment installation parts (1221).

8. An elevator landing door gap force application measuring instrument according to claim 7, characterized in that: The displacement sensor (13), the upper frame member (122), the slider (121), and the lower frame member (123) are tightly connected by a first screw (14); After the first alignment installation part (1221) and the second alignment installation part (1231) are aligned and installed, they are tightly connected by a second screw (15).

9. An elevator landing door gap force application measuring instrument according to claim 7, characterized in that: Scales are provided on the upper frame member (122) and / or the lower frame member (123).

10. An elevator landing door gap force application measuring instrument according to claim 7, characterized in that: A battery compartment (24) is provided inside the main unit housing (21), and a key area (25) is also provided on the main unit housing (21).

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