Portable device for detecting speed difference between handrail and steps of escalator

Abstract

The application discloses a portable detection device for the speed difference between a handrail and steps of an escalator, which 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, the fixing part can detachably fix the second detection box and the handrail, the first detection box internally comprises a rope collecting reel and a screw rod, the screw rod is fixedly arranged, the axis of the screw rod coincides with the center line of the rope collecting reel, at least one side wall of the rope collecting reel, which is penetrated by the screw rod, is provided with an internal thread, the internal thread is matched with an external thread on the screw rod, the rope collecting reel is provided with a measuring rope, one end of the measuring rope is connected with the second detection box, and a spiral spring is further arranged between the rope collecting reel and the screw rod. The device is simple in structure and can quickly detect the speed difference between the handrail and the steps.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of detectors, in particular to a portable detection device for speed difference between handrails and steps of escalators. BACKGROUND

[0002] According to relevant industry standards, the speed of handrails of escalators needs to be greater than the speed of steps, and the speed difference between the two needs to be controlled within a certain range to reduce the occurrence of passenger falling accidents on escalators. For the speed difference of escalators, most of the current wheel type speed measuring devices are used, but the disadvantages are that the wheel type device is easy to slip, resulting in distorted measurement data; at the same time, the device is bulky and can only be used during maintenance, and it is difficult to measure during daily use. SUMMARY

[0003] To solve at least one of the above problems, the present application provides a portable detection device for speed difference between handrails and steps of escalators.

[0004] The technical scheme of the present application is as follows: a portable detection device for speed difference between handrails and steps of escalators, comprising a first detection box and a second detection box, a roller is arranged on the first detection box, a fixing member is arranged on the second detection box, and the fixing member can detachably fix the second detection box and the handrail.

[0005] The first detection box comprises a rope collecting reel and a screw rod, the screw rod is fixedly arranged, the axis of the screw rod coincides with the center line of the rope collecting reel, at least one side wall of the rope collecting reel through which the screw rod passes is provided with an internal thread, and the internal thread cooperates with an external thread on the screw rod.

[0006] A measuring rope is arranged on the rope collecting reel, one end of the measuring rope is connected to the second detection box, a spiral spring is further arranged between the rope collecting reel and the screw rod, the spiral spring straightens the measuring rope between the first detection box and the second detection box, and the spiral spring recovers the external measuring rope into the rope collecting reel after measurement.

[0007] In an embodiment of the present application, the first detection box further comprises 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 limiting device is arranged between the linear guide rail and the rope collecting reel, the limiting device allows relative displacement between the linear guide rail and the rope collecting reel in the horizontal direction, a helical groove is arranged on the outer wall of the rope collecting reel, the helical groove has the same pitch as the external thread and opposite rotation direction, one end of the spiral spring is arranged on the screw rod and the other end is arranged on the inner wall of the linear guide rail.

[0008] One embodiment of the present application is that the first detection box further comprises an encoding disc, which is used to detect the angular velocity of the rope collecting reel.

[0009] One embodiment of the present application is that the internal structure of the second detection box is the same as that of the first detection box.

[0010] One embodiment of the present application is that the first detection box is provided with a guide pulley block at the measuring rope outlet, and one end of the measuring rope is connected to the second detection box through the guide pulley block.

[0011] Beneficial effects: The device of the present application has simple structure and can quickly detect the speed difference between the handrail and the steps. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the present embodiment;

[0013] Figure 2 It is a schematic diagram of the internal structure of the first detection box;

[0014] Figure 3 It is a schematic diagram of the structure of the rope collecting reel;

[0015] Figure 4 It is a schematic diagram of the assembly structure of the spiral spring, linear guide rail and rope collecting reel;

[0016] Figure 5 It is a schematic diagram of the assembly structure of the encoding disc.

[0017] In the figure, 1 is the first detection box, 2 is the second detection box, 3 is the handrail, 4 is the measuring rope, 5 is the rope collecting reel, 6 is the linear guide rail, 7 is the spiral spring, 8 is the screw rod, 9 is the rotating bearing, 10 is the encoding disc, and 11 is the guide pulley block.

[0018] 501 is the spiral groove, and 502 is the sliding groove.

[0019] 601 is the sliding block. DETAILED DESCRIPTION

[0020] The specific embodiments of the present application will be described below in conjunction with examples and drawings. Obviously, the described examples are only part of the embodiments of the present application, not all.

[0021] As Figures 1-5 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, the first detection box 1 is provided with a roller, the second detection box 2 is provided with a fixing member, and the fixing member can detachably fix the second detection box 2 and the handrail 3.

[0022] The first detection box 1 comprises a rope collecting reel 5 and a screw rod 8, the screw rod 8 is fixedly arranged, the axis of the screw rod 8 coincides with the center line of the rope collecting reel 5, at least one side wall of the rope collecting reel 5 through which the screw rod 8 passes is provided with an internal thread, and the internal thread cooperates with an external thread on the screw rod 8;

[0023] The rope collecting reel 5 is provided with a measuring rope 4, one end of the measuring rope 4 is connected to the second detection box 2, and a volute spring 7 is further arranged between the rope collecting reel 5 and the screw rod 8, the volute spring 7 is used to straighten the measuring rope 4 between the first detection box 1 and the second detection box 2, and the volute spring 7 is used to recover the external measuring rope 4 into the rope collecting reel 5 after the measurement is completed.

[0024] Specifically, in the 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, the inside is a smaller size empty shell, that is, no components are arranged, and only serves as a fixing member and a mounting member of the measuring rope 4; when the internal structures of the two are the same, the internal structure of the second detection box 2 is completely the same as that of the first detection box 1, such as being provided with a rope collecting reel 5, a screw rod 8, a volute spring 7 and the like. In the embodiment, the internal structure of the second detection box 2 is completely the same as that of the first detection box 1. Such an advantage is that the escalator with faster and slower speeds of the handrail 3 can be detected at the same time.

[0025] At the same time, for the first detection box 1, the rollers arranged thereon are mainly used to ensure that the first detection box 1 can move on the handrail 3; the fixing member arranged on the second detection box 2 is mainly used to ensure that the second detection box 2 can be fixedly arranged on the handrail 3 within a required time period, and at the same time, we require that the fixing member can be disassembled, and when the measurement is completed, the first detection box 1 and the second detection box 2 can be quickly removed. For the fixing member, a common suction cup or the like can be selected, and a person skilled in the art can select the remaining fixing members according to the actual situation.

[0026] For the rope collecting reel 5 and the screw rod 8, such an arrangement is mainly used to enable the rope collecting reel 5 to rotate around its axis. Under normal conditions, we can arrange two side walls on the rope collecting reel 5, and the two side walls plus the circumferential side wall of the rope collecting reel form a hollow cylinder. Of course, only one side wall can also be arranged, and the side wall plus the circumferential side wall of the rope collecting reel form an open cylinder. When the measuring rope 4 on the rope collecting reel 5 is pulled out due to a speed difference, the rope collecting reel 5 rotates.

[0027] In order to make the measuring rope 4 straight during the test, and to make the measuring rope 4 be collected on the collecting reel 5 after the test, we also set a spiral spring 7. 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 stored energy of the spiral spring 7 makes the spiral spring 7 recover, thereby recovering the measuring rope 4.

[0028] In some embodiments, since the speed difference between the steps and the handrails is very small, usually 0.1-2 cm / s, and the whole escalator moves from bottom to top for several seconds to tens of seconds. Therefore, even if the diameter of the measuring rope 4 is small, but if the measuring rope 4 is repeatedly stacked on the collecting reel 5, it will cause the error to become large. In order to solve this problem, a cylindrical linear guide rail 6 is also provided in the first detection box 1.

[0029] The cylindrical linear guide rail 6 is concentrically arranged with the collecting reel 5, the screw rod 8 passes through the cylindrical linear guide rail 6 and the cylindrical linear guide rail 6 can rotate around the screw rod 8, but one end of the cylindrical linear guide rail 6 corresponds to a rotating bearing 9, and the rotation of the two is relatively free. A limiting device is arranged between the linear guide rail 6 and the collecting reel 5, which allows the linear guide rail 6 and the collecting reel 5 to produce relative displacement in the horizontal direction. Usually, the limiting device can be set as a sliding groove 502 and a sliding block 601, such as a sliding groove 502 is arranged on the inner wall of the collecting reel 5, and a sliding block 601 is arranged on the outer side wall of the linear guide rail 6. Of course, those skilled in the art can use other limiting devices that can achieve the same purpose. A helical groove 501 is arranged on the outer wall of the collecting reel 5, the pitch of the helical groove 501 is equal to the pitch of the external thread, and the rotation direction is opposite. One end of the spiral spring 7 is arranged on the screw rod 8, and the other end is arranged on the inner wall of the linear guide rail 6. In use, the measuring rope 4 is arranged on the collecting reel 5 according to the helical direction of the helical groove 501, and the linear guide rail 6 makes the collecting reel 5 move horizontally along the linear guide rail 6 to avoid repeated stacking when the measuring rope 4 is retracted or extended.

[0030] In such a setting, when the measuring rope 4 is subjected to external force, the collecting reel 5 starts to rotate under the action of the external force. When the collecting reel 5 rotates, due to the existence of the internal thread and the external thread, the collecting reel 5 also has horizontal displacement along the screw rod 8. At the same time, since the corresponding limiting device is arranged between the collecting reel 5 and the linear guide rail 6, and the pitch of the helical groove is equal to the pitch of the external thread, when the collecting reel 5 moves in the horizontal direction, and the measuring rope 4 is arranged according to the helical direction of the helical groove 501, the outlet direction of the measuring rope 4 does not change, which reduces the error caused by the change of the outlet of the measuring rope 4, and avoids the problem of repeated stacking of the measuring rope 4 on the collecting reel 5. When the measuring is completed, the measuring rope 4 is recovered, and the recovered measuring rope 4 can still be arranged on the collecting reel 5 according to the helical direction of the helical groove 501.

[0031] In order to make the measuring rope 4 more stable when being pulled out, at least one set of guide pulley blocks 11 is arranged at the outlet of the measuring rope 4, the guide pulley blocks 11 include two fixed pulleys, which adjust the pulling direction and state of the measuring rope 4 when the measuring rope 4 is pulled out, which is a conventional arrangement in the art.

[0032] The device as described above, in combination with time and the length of the measuring rope being pulled out, can measure the speed difference between the steps and the handrail, but an additional time monitor is needed, which is more troublesome. Therefore, an encoder disc 10 is further arranged on the first detection box, which is arranged at one end of the linear guide rail 6, for measuring the angular velocity of the linear guide rail 6, and through the angular velocity and the diameter of the rope collecting drum 5, the speed difference between the handrail and the steps at any time can be obtained.

[0033] In some cases, a corresponding power supply module and a Bluetooth module can also be arranged in the first detection box, the power supply module is used for supplying power to the encoder disc and the Bluetooth module, and the Bluetooth module is used for sending the measured values to the mobile terminal, which belongs to the conventional technology in the art.

[0034] In use, the second detection box is fixed to the handrail, the tester stands still on the steps, and the tester holds the first detection box with one hand and places the rollers 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 rope collecting drum is pulled out, and then according to the angular velocity recorded on the encoder disc and the diameter of the rope collecting drum, the real-time speed difference between the steps and the handrail can be calculated.

[0035] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application, any skilled person in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the technical solution of the present application, and any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the present application, all still belong to the scope of the technical solution of the present application.

Claims

1. A portable detection device for the speed difference between the handrail and the steps of an escalator, characterized in that, The application relates to a rope measuring device, which comprises a first detection box and a second detection box, wherein a roller is arranged on the first detection box, and a fixing member is arranged on the second detection box, and the fixing member can detachably fix the second detection box and a handrail. The first detection box comprises a rope collecting reel and a screw rod, the screw rod is fixedly arranged, the axis of the screw rod coincides with the center line of the rope collecting reel, at least one side wall of the rope collecting reel, which is penetrated by the screw rod, 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 reel, one end of the measuring rope is connected with the second detection box, a spiral spring is further arranged between the rope collecting reel and the screw rod, the spiral spring can straighten the measuring rope between the first detection box and the second detection box, and the spiral spring can also recover the external measuring rope into the rope collecting reel after measurement. The first detection box further comprises a cylindrical linear guide rail, the screw rod penetrates through the cylindrical linear guide rail, and the cylindrical linear guide rail can rotate around the screw rod; a limiting device is arranged between the linear guide rail and the rope collecting reel, the limiting device allows the linear guide rail and the rope collecting reel to produce relative displacement in the horizontal direction; a helical groove is arranged on the outer wall of the rope collecting reel, the helical groove has the same pitch as the external thread and opposite rotation direction; one end of the spiral spring is arranged on the screw rod, and the other end of the spiral spring is arranged on the inner wall of the linear guide rail.

2. The apparatus of claim 1, wherein, The first detection box further comprises an encoding disc, and the encoding disc is used for detecting the angular velocity of the rope collecting reel.

3. The apparatus of claim 1, wherein, The internal structure of the second detection box is the same as that of the first detection box.

4. The apparatus of claim 1, wherein, A guide pulley block is arranged at the outlet of the measuring rope of the first detection box, and one end of the measuring rope is connected with the second detection box through the guide pulley block.

Images