Portable detection device for detecting speed difference between handrails and stairs of escalator

Abstract

The invention discloses a portable detection device for the speed difference between a handrail and stairs of an escalator, and the portable detection device comprises a first detection box and a second detection box, the first detection box is provided with a roller, the second detection box is provided with a fixing part, and the fixing part can detachably fix the second detection box and the handrail; the first detection box internally comprises a rope collection winding drum and a screw rod, the screw rod is fixedly arranged, the axis of the screw rod coincides with the center line of the rope collection winding drum, at least one side wall, through which the screw rod penetrates, of the rope collection winding drum is provided with an internal thread, and the internal thread is matched with an external thread on the screw rod; a measuring rope is arranged on the rope collecting winding drum, and one end of the measuring rope is connected with the second detection box; a volute spiral spring is further arranged between the rope collecting winding drum and the screw. The device is simple in structure, and the speed difference between the handrail and the stairs can be rapidly detected.

Description

Technical Field

[0001] The invention relates to the technical field of detectors, in particular to a portable detection device for speed difference between a handrail and a step of an escalator. Background Art

[0002] According to the requirements of relevant industry standards, the handrail speed of the escalator needs to be greater than the step speed, and the speed difference between the two needs to be controlled within a certain range to reduce the occurrence of passenger falls on the escalator. As for the speed difference of the escalator, most of them currently use wheel-type speed measuring devices, but their disadvantage is that wheel-type devices are prone to slipping, resulting in distortion of measurement data; at the same time, this type of device is bulky and can only be used for maintenance, and is difficult to measure during daily use. Summary of the invention

[0003] To solve at least one of the above problems, the present invention provides a portable detection device for the speed difference between a handrail and steps of an escalator.

[0004] The technical solution of the present invention is: a portable detection device for the speed difference between the handrail and the steps of an escalator, comprising a first detection box and a second detection box, wherein the first detection box is provided with a roller, and the second detection box is provided with a fixing member, wherein the fixing member can detachably fix the second detection box and the handrail; The first detection box includes a rope gathering drum and a screw rod, the screw rod is fixedly arranged, and the axis of the screw rod coincides with the center line of the rope gathering drum, and at least one side wall of the rope gathering drum passed by the screw rod is provided with an internal thread, and the internal thread cooperates with the external thread on the screw rod; A measuring rope is provided on the rope gathering drum, and one end of the measuring rope is connected to the second detection box. A volute spring is also provided between the rope gathering drum and the screw rod, and the measuring rope between the first detection box and the second detection box is straightened by the volute spring, and the external measuring rope is recovered into the rope gathering drum by the volute spring after the measurement is completed.

[0005] One embodiment of the present invention is that the first detection box also includes a cylindrical linear guide rail, the screw rod passes through the cylindrical linear guide rail and the cylindrical linear guide rail can rotate around the screw rod; a limit device is provided between the linear guide rail and the rope gathering drum, and the limit device allows relative displacement in the horizontal direction between the linear guide rail and the rope gathering drum; a spiral groove is provided on the outer wall of the rope gathering drum, and the pitch of the spiral groove is equal to that of the external thread and the rotation direction is opposite; one end of the spiral spring is provided on the screw rod, and the other end is provided on the inner wall of the linear guide rail.

[0006] An implementation manner of the present invention is that the first detection box further includes an encoding disc, and the encoding disc is used to detect the angular velocity of the rope gathering drum.

[0007] An implementation manner of the present invention is that the internal structure of the second detection box is the same as the internal structure of the first detection box.

[0008] An implementation manner of the present invention is that a guide pulley block is provided at the measuring rope outlet of the first detection box, and one end of the measuring rope is connected to the second detection box via the guide pulley block.

[0009] Beneficial effects: The device of the present invention has a simple structure and can quickly detect the speed difference between the handrail and the steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 Schematic diagram of the overall structure of this embodiment; Figure 2 is a schematic diagram of the internal structure of the first detection box; Figure 3 This is a schematic diagram of the rope gathering drum structure; Figure 4 It is a schematic diagram of the assembly structure of the scroll spring, the linear guide rail and the rope gathering drum; Figure 5 Schematic diagram of the assembly structure of the encoding disk.

[0011] In the figure, 1 is a first detection box, 2 is a second detection box, 3 is a handrail, 4 is a measuring rope, 5 is a rope collection drum, 6 is a linear guide rail, 7 is a volute spring, 8 is a screw, 9 is a rotating bearing, 10 is an encoding disk, and 11 is a guide pulley block; 501 is a spiral groove, 502 is a slide groove; 601 is a slider. DETAILED DESCRIPTION

[0012] The specific implementation modes of the present invention will be described clearly and completely below with reference to examples and drawings. Obviously, the described examples are only some embodiments of the present invention, rather than all embodiments.

[0013] like Figure 1-5 As shown, a portable detection device for the speed difference between the handrail and the steps of an escalator comprises a first detection box 1 and a second detection box 2, wherein the first detection box 1 is provided with a roller, and the second detection box 2 is provided with a fixing member, wherein the fixing member can detachably fix the second detection box 2 and the handrail 3; The first detection box 1 includes a rope gathering drum 5 and a screw 8, the screw 8 is fixedly arranged, and the axis of the screw 8 coincides with the center line of the rope gathering drum 5, and at least one side wall of the rope gathering drum 5 passed by the screw 8 is provided with an internal thread, and the internal thread cooperates with the external thread on the screw 8; A measuring rope 4 is provided on the rope gathering drum 5, and one end of the measuring rope 4 is connected to the second detection box 2; a volute spring 7 is also provided between the rope gathering drum 5 and the screw rod 8, and the measuring rope 4 between the first detection box 1 and the second detection box 2 is straightened by the volute spring 7, and the external measuring rope 4 is recovered into the rope gathering drum 5 by the volute spring 7 after the measurement is completed.

[0014] Specifically, in this embodiment, the specific internal structures of the first detection box 1 and the second detection box 2 can be the same, but can also be different. When the internal structures of the two are different, for the second detection box 2, its interior is a small-sized empty shell, that is, it is not provided with any components, and it only serves as a fixing part and a mounting part for the measuring rope 4; when the internal structures of the two are the same, the internal structure of the second detection box 2 is exactly the same as the internal structure of the first detection box 1, for example, both are provided with a rope gathering drum 5, a screw 8, a spiral spring 7, etc. In this embodiment, the internal structure of the second detection box 2 is exactly the same as the internal structure of the first detection box 1. This has the advantage that escalators with faster and slower handrails 3 can be detected at the same time.

[0015] At the same time, for the first test box 1, the roller provided therein is mainly to ensure that the first test box 1 can be moved on the armrest 3; the fixing part provided on the second test box 2 is mainly to ensure that the second test box 2 can be fixedly set on the armrest 3 within the required time period. At the same time, we require that the fixing part can be disassembled, and when the measurement is finished, the first test box 1 and the second test box 2 can be quickly removed. For the fixing part, a commonly used suction cup or the like can be selected, and technical personnel in this field can select the remaining fixing parts according to actual conditions.

[0016] For the rope gathering drum 5 and the screw 8, such a configuration is mainly to enable the rope gathering drum 5 to rotate around its axis. Under normal conditions, we can set two side walls on the rope gathering drum 5. These two side walls plus the peripheral side wall of the rope gathering drum make the rope gathering drum 5 form a hollow cylinder; of course, only one side wall can be set, and this side wall plus the peripheral side wall of the rope gathering drum form an uncovered cylinder. When the measuring rope 4 on the rope gathering drum 5 is pulled out due to the speed difference, the rope gathering drum 5 rotates.

[0017] In order to make the measuring rope 4 straight during the test and to retract the measuring rope 4 onto the rope gathering drum 5 after the test, a spiral spring 7 is also provided. When the measuring rope 4 is subjected to external force, the spiral spring 7 is tightened and stores energy, and the measuring rope 4 is pulled out. When the external force disappears, the storage capacity of the spiral spring 7 makes the spiral spring 7 recover, thereby retracting the measuring rope 4.

[0018] In some embodiments, since the speed difference between the steps and the handrail is very small, usually 0.1-2 cm / s, and the movement time of the entire escalator from bottom to top is usually several seconds to tens of seconds. Therefore, even if the diameter of the measuring rope 4 is very small, if the measuring rope 4 is repeatedly stacked on the rope drum 5, the error will become larger. In order to solve this problem, a cylindrical linear guide rail 6 is also provided in the first detection box 1.

[0019] The cylindrical linear guide 6 is arranged concentrically with the rope gathering drum 5, and the screw 8 passes through the cylindrical linear guide 6 and the cylindrical linear guide 6 can rotate around the screw 8, but the cylindrical linear guide 6 has a corresponding rotating bearing 9 at one end, and the two can rotate relatively freely. A limiting device is provided between the linear guide 6 and the rope gathering drum 5, and the limiting device allows a relative displacement in the horizontal direction between the linear guide 6 and the rope gathering drum 5. Usually, the limiting device can be provided as a slide groove 502 and a slider 601, for example, a slide groove 502 is provided on the inner wall of the rope gathering drum 5, and a slider 601 is provided on the outer wall of the linear guide 6. Of course, those skilled in the art can use other limiting devices that can achieve the same purpose. A spiral groove 501 is provided on the outer wall of the rope gathering drum 5. The pitch of the spiral groove 501 is equal to that of the external thread, and the rotation direction is opposite. One end of the spiral spring 7 is provided on the screw rod 8, and the other end is provided on the inner wall of the linear guide rail 6. When in use, the measuring rope 4 is arranged on the rope gathering drum 5 according to the spiral direction of the spiral groove 501. The linear guide rail 6 allows the rope gathering drum 5 to move horizontally along the linear guide rail 6 due to the threaded connection between the spiral groove 501 and the screw rod 8 when the measuring rope 4 is retracted and released to avoid repeated stacking.

[0020] Under such a setting, when the measuring rope 4 is subjected to external force, the rope gathering drum 5 starts to rotate under the action of the external force. When the rope gathering drum 5 rotates, due to the existence of the internal thread and the external thread, the rope gathering drum 5 also has the function of horizontal displacement along the screw 8; at the same time, since a corresponding limiting device is arranged between the rope gathering drum 5 and the linear guide 6, and the pitch of the spiral groove is equal to the pitch of the external thread, when the rope gathering drum 5 moves in the horizontal direction, and the measuring rope 4 is arranged according to the spiral direction of the spiral groove 501, the outlet direction of the measuring rope 4 remains unchanged, thereby reducing the error caused by the change in the outlet of the measuring rope 4, and avoiding the problem of repeated accumulation of the measuring rope 4 on the rope gathering drum 5; when the measurement is completed, the measuring rope 4 is recovered, and the recovered measuring rope 4 can still be set on the rope gathering drum 5 according to the spiral direction of the spiral groove 501.

[0021] In order to make the measuring rope 4 more stable when being pulled out, at least one set of guide pulley group 11 is also provided at the outlet of the measuring rope 4. The guide pulley group 11 includes two fixed pulleys. When the measuring rope 4 is pulled out, the two fixed pulleys will adjust the pulling direction and state of the measuring rope 4. This is a conventional setting in this field.

[0022] The above device can measure the speed difference between the step and the handrail by combining the time and the length of the rope pulled out, but it requires an additional time monitor, which is troublesome. For this reason, we also set an encoder disk 10 on the first detection box, which is set at one end of the linear guide 6 and is used to measure the angular velocity of the linear guide 6. Through the angular velocity and the diameter of the rope drum 5, we can get the speed difference between the handrail and the step at any time.

[0023] In some cases, we can also set a corresponding power supply module and Bluetooth module in the first measuring box. The power supply module is used to power the encoder disk and the Bluetooth module, and the Bluetooth module is used to send the measured value to the mobile terminal. This belongs to the conventional technology in this field.

[0024] When in use, the second detection box is fixed on the handrail, the tester stands on the steps and remains motionless, and the tester holds the first detection box with one hand and places the roller of the first detection box on the handrail. When there is a speed difference between the steps and the handrail, the test rope on the wire gathering drum is pulled out, and then the real-time speed difference between the steps and the handrail can be calculated based on the angular velocity record on the encoder disk and the diameter of the rope gathering drum.

[0025] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A portable detection device for the speed difference between handrails and steps of an escalator, characterized in that: It comprises a first detection box and a second detection box, wherein the first detection box is provided with a roller, and the second detection box is provided with a fixing piece, and the fixing piece can detachably fix the second detection box and the armrest; The first detection box includes a rope gathering drum and a screw rod, the screw rod is fixedly arranged, and the axis of the screw rod coincides with the center line of the rope gathering drum, and at least one side wall of the rope gathering drum passed by the screw rod is provided with an internal thread, and the internal thread cooperates with the external thread on the screw rod; A measuring rope is provided on the rope gathering drum, and one end of the measuring rope is connected to the second detection box. A volute spring is also provided between the rope gathering drum and the screw rod, and the measuring rope between the first detection box and the second detection box is straightened by the volute spring, and the external measuring rope is recovered into the rope gathering drum by the volute spring after the measurement is completed.

2. The device according to claim 1, characterized in that The first detection box also includes a cylindrical linear guide rail, the screw rod passes through the cylindrical linear guide rail and the cylindrical linear guide rail can rotate around the screw rod; a limit device is provided between the linear guide rail and the rope gathering drum, and the limit device allows relative displacement in the horizontal direction between the linear guide rail and the rope gathering drum; a spiral groove is provided on the outer wall of the rope gathering drum, and the pitch of the spiral groove is equal to that of the external thread and the rotation direction is opposite; one end of the volute spring is provided on the screw rod, and the other end is provided on the inner wall of the linear guide rail.

3. The device according to claim 1, characterized in that The first detection box further comprises an encoding disc, and the encoding disc is used to detect the angular velocity of the rope gathering drum.

4. The device according to claim 1, characterized in that The internal structure of the second detection box is the same as the internal structure of the first detection box.

5. The device according to claim 1, characterized in that A guide pulley block is provided at the measuring rope outlet of the first detection box, and one end of the measuring rope is connected to the second detection box via the guide pulley block.

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