Location detection switch unit and location measurement method

Abstract

The present invention addresses the problem of providing a position detection switch unit and a position detection method that can be easily set up for a position detection device without reducing the accuracy of position detection. The solution of the present invention comprises: a frame (7); a switch (3) that is turned ON and OFF by moving the detection unit (30) up and down to detect the position of the detected unit (21); and a lever plate (4) that is inserted into / out of the detection unit (30) in the horizontal direction to move the detection unit (30) up and down; the lever plate (4) has: a protrusion (41) that can move in and out of the frame (7) in the horizontal direction intersecting the movement direction (X) relative to the horizontal direction of the detected unit (21); and a switch actuation unit (42) that is linked with the protrusion (41) to move in and out of the frame (7) in the horizontal direction and is inserted into / out of the detection unit (30) in the horizontal direction to turn the detection unit (30) ON and OFF.

Description

[Technical Field]

[0001] This invention relates to a position detection switch unit and a position detection method. [Previous Technology]

[0002] Conventionally, mobile machines such as switching devices housed in distribution panels are equipped with switches for detecting connection and disconnection positions. Conventionally, these switches have the following structure: A component (hereinafter referred to as a guide) for actuating the switch on the side of the switchgear, which is the switching device or other mobile machine, is mounted on the side of the switchgear's carriage. In contrast, a switch is mounted on the side of the fixed frame housing the switchgear. In this mounting method, a microswitch is used as the switch body. Based on the distance between the detection of the connection and disconnection positions of the switchgear, the microswitch is mounted on a mounting plate, and this mounting plate is mounted on the side of the track of the component that serves as the fixed frame. The switch located on the side of the carriage detects the connection position of the switchgear, and the switch located at the front detects the disconnection position of the switchgear. The switch actuation is performed by directly pushing the hinge lever of the microswitch upwards via the guide during the movement of the switch to the side of the carriage. The connection and disconnection positions of the switchgear are detected in the sequence of switch actuation (see, for example, Non-Patent Document 1). [Prior Art Documents] [Non-Patent Documents]

[0003] Non-Patent Document 1: Mitsubishi Electric, Mitsubishi High Voltage Vacuum Interruptor VF-20D / 25D / 32D / 40D Series, June 2020, pp. 07-12 [Summary of the Invention]

[0004] [Problem to be Solved by the Invention] In conventional position detection switch units and position detection methods, the upward pushing amount of the switch lever is affected by the accuracy of the guide's mounting position, the accuracy of the microswitch's mounting position on the mounting plate, and the accuracy of the mounting plate's mounting position on the fixed frame, which in turn affects the vertical dimension of each component. This causes variations in the upward pushing amount of the microswitch. Therefore, during assembly, the blocking body must be inserted into the fixed frame, requiring adjustment of the switch's upward pushing amount and confirmation of the switch's operation through assembly.

[0005] This invention discloses a method for solving the aforementioned problems, aiming to provide a position detection switch unit and a position detection method that allow for easy installation of a position detection device without reducing the accuracy of position detection. [Means for solving the problems]

[0006] The position detection switch unit disclosed in this invention detects the position of a detected part and includes: a frame; a switch that detects the position of the detected part by moving the detection part up and down to switch it on and off; and a lever plate that moves the detection part up and down by inserting / pulling it out below the detection part in a horizontal direction; the lever plate has: a protrusion that can move in and out of the frame in a horizontal direction that intersects with the direction of movement relative to the horizontal direction of the detected part; and a switch actuation part that is linked with the protrusion to move in and out of the frame in a horizontal direction to insert / pull out below the detection part in a horizontal direction to switch the detection part on and off. Furthermore, the position detection method disclosed in this invention is a position determination method for a position detection target device comprising a detected part that moves along the aforementioned moving direction, comprising: placing the aforementioned position detection switch unit described above on the path of the detected part along the aforementioned moving direction; and determining the position of the position detection target device on the aforementioned path by moving the detected part along the aforementioned moving direction to bring it into contact with the aforementioned protrusion of the aforementioned position detection switch unit. [Effects of the Invention]

[0007] According to the position detection switch unit and position detection method disclosed in this invention, the position detection target device can be easily set up without reducing the accuracy of position detection.

Implementation Method

[0009] Embodiment 1 Figure 1 is a front view showing the position detection switch unit configured according to Embodiment 1 installed in the position detection target device. Figure 2 is a top view showing the configuration of the position detection switch unit and the position detection target device shown in Figure 1. Figure 3A is a perspective view showing the configuration of the position detection switch unit shown in Figure 1 from above. Figure 3B is a front view showing the configuration of the position detection switch unit shown in Figure 3A. Furthermore, Figure 3B is conveniently shown with the other side 72 of the frame 7 described later removed. Figure 4 is a perspective view showing the configuration of the frame of the position detection switch unit shown in Figure 3 from above.

[0010] Figure 5A is a top view showing the structure of the lever plate of the position detection switch unit shown in Figure 3. Figure 5B is a left side view showing the structure of the lever plate shown in Figure 5A. Figure 5C is a perspective view showing the structure of the lever plate shown in Figure 5A from above. Figure 5D is a perspective view showing the structure of the lever plate shown in Figure 5A from below. Figure 6A is a top view showing the structure of the frame, spring, and lever plate of the position detection switch unit shown in Figure 3 in the OFF (off) state. Figure 6B is a top view showing the structure of the frame, spring, and lever plate of the position detection switch unit shown in Figure 3 in the ON (conducting) state.

[0011] Figure 7A is a top view showing the frame, spring, lever plate, and roller of the position detection switch unit shown in Figure 3 in the OFF state, and is also a top view seen from the direction of the arrow along line Z2-Z2 in Figure 7B. Figure 7B is a front view seen from the direction of the arrow along line Z1-Z1 of the position detection switch unit shown in Figure 7A. Figure 8A is a top view showing the frame, spring, lever plate, and roller of the position detection switch unit shown in Figure 3 in the ON state, and is also a top view seen from the direction of the arrow along line Z4-Z4 in Figure 8B. Figure 8B is a front view seen from the direction of the arrow along line Z3-Z3 of the position detection switch unit shown in Figure 8A.

[0012] First, an example of a position detection switch unit 1 in this embodiment 1, for instance, using a stopper as a position detection device for a detected part, will be described. As shown in Figures 1 and 2, the detected part is a trolley 21 equipped with a stopper (not shown). To limit the movement of the trolley 21 to only one direction of movement in the movement direction belonging to the horizontal direction during the entry and exit of the stopper, it moves on a track 20, which is the path formed on the fixed frame 22 for housing the stopper. In this way, the stopper itself also moves along the movement direction belonging to the horizontal direction along with the trolley 21 of the detected part. Here, the movement direction belonging to the horizontal direction is defined as the movement direction X, and the right side (front side) on the paper is defined as the rear side X1, and the left side (left side) on the paper is defined as the front side X2. Furthermore, the position detection switch unit 1 is provided above this track 20 at two parts of the fixed frame 22, separated by a predetermined distance along the movement direction X.

[0013] The two parts of the position detection switch unit 1 are used to detect the connection position and the open circuit position of the stopper. Here, the front side X2 of the position detection switch unit 1 is used for connection position detection, and the rear side X1 is used for open circuit position detection. The position of the protrusion 41 of the lever plate 4, which is located after the position detection switch unit 1 on the fixed frame 22, is set at a height lower than the upper surface of the trolley 21, and is at the height that the protrusion 41 of the lever plate 4 will contact during the movement of the trolley 21 in the moving direction X. In this way, the position of the stopper is detected as the connection position and the open circuit position.

[0014] Next, the configuration of the position detection switch unit 1 will be explained. As shown in FIG3, the position detection switch unit 1 has a frame body 7, a switch 3, a lever plate 4, and a spring part 5. The switch 3 has a body 33 and a detection part 30, and detects the position of the trolley 21 by moving the detection part 30 up and down to switch it ON and OFF. The detection part 30 has a roller part 31 and a hinge rod 32, which is provided at one end of the body 33 and pushes the roller part 31 downward by restoring force.

[0015] The main body 33 is fixed to the frame body 7 by screws 6 and through screw holes 83 described later in the frame body 7, and will not move. In this embodiment, to avoid redundancy, two switches 3 are provided in the position detection switch unit 1. However, the present invention is not limited to this example, and even a single switch 3 can detect the position. Since this is also the case in the following embodiments, its description will be omitted as appropriate.

[0016] As shown in Figure 4, the frame 7 is formed in a roughly U-shaped vertical cross-section having one side 71, another side 72, and a bottom surface 73. On the lower side of one side 71, there is a locking portion 82 protruding upwards with a partial notch, and a screw hole 83 is located on the upper side. On the lower side of the other side 72, there is a side hole 81. Furthermore, the bottom surface 73 has bottom openings 84 and 85 at two locations and arc-shaped guide holes 86.

[0017] As shown in Figure 5, the lever plate 4 has a protrusion 41 and a switch actuation part 42. The protrusion 41 can move in and out of the frame body 7 in a horizontal direction intersecting the movement direction X of the trolley 21. The switch actuation part 42 is linked with the protrusion 41 to move in and out of the frame body 7 in a horizontal direction, and is inserted / pulled out below the detection part 30 in a horizontal direction to turn the aforementioned detection part 30 ON or OFF. The switch actuation part 42 has an opening 43 and a notch 44, a guide part 45 protruding downward, and an elongated hole 46.

[0018] The state of the protrusion 41 before the external load force is applied will be explained with reference to FIG. 6A. The lever plate 4 is provided on the bottom surface 73 of the frame body 7. Furthermore, the protrusion 41 of the lever plate 4 is arranged to protrude outward from the side hole 81 of the frame body 7 (see FIG. 3), and is formed in such a way that it can enter and exit the frame body 7 to the outside in a horizontal direction that intersects with the moving direction X of the trolley 21. Furthermore, the guide portion 45 of the lever plate 4 is provided to be inserted into the guide hole 86 (see FIG. 3).

[0019] The spring part 5 is engaged with the locking part 82. The front end of one end is bent into an L-shape and inserted into the elongated hole 46 of the lever plate 4. The spring part 5 pushes the lever plate 4 in a horizontal direction, in this case, outwards towards the other side 72 of the frame body 7 (see Figure 7). In this way, when the protrusion 41 is not under load, as shown in Figure 6A, the protrusion 41 remains in the initial position protruding outwards from the side hole 81.

[0020] Furthermore, in this state, the opening 43 of the lever plate 4 is connected to the bottom opening 84 of the frame body 7 in the vertical direction, and the notch 44 of the lever plate 4 is connected to the bottom opening 85 of the frame body 7. Furthermore, as shown in FIG7B, the roller part 31 is pushed downward by the hinge rod 32. As shown in FIG7A, the roller part 31 of the switch 3 is located at the opening 43, bottom opening 84, notch 44, and bottom opening 85 connected in the vertical direction. The switch actuation part 42 is not inserted into the lower part of the roller part 31, so the switch 3 is kept OFF.

[0021] Next, the state of the protrusion 41 being subjected to external load force will be explained with reference to FIG. 6B. For the protrusion 41 of the lever plate 4, which is arranged to protrude outward from the side hole 81 of the frame body 7, when the trolley 21 is subjected to load force in the moving direction X, the protrusion 41 moves inward from the side hole 81 of the frame body 7 (see FIG. 8). Of course, a force greater than the restoring force of the spring part 5 applies to the lever plate 4 towards the inward side of the frame body 7 in the horizontal direction.

[0022] As described above, when force is applied to the protrusion 41, the guide portion 45 slides to the guide hole 86, and the switch actuation portion 42 moves. Furthermore, by moving the switch actuation portion 42, the opening portion 43, the bottom opening portion 84, the notch portion 44, and the bottom opening portion 85 become disconnected in the vertical direction.

[0023] Furthermore, as shown in FIG8A, the switch actuation part 42 is inserted below the roller part 31. As shown in FIG8B, the roller part 31 moves upward, and the switch 3 is ON. Of course, when the switch actuation part 42 is inserted below the roller part 31, a force greater than the force that pushes the roller part 31 downward by the hinge rod 32 is applied upward. Furthermore, when the switch actuation part 42 is inserted below the roller part 31, the roller part 31 rotates, and the roller part 31 can easily ride on the switch actuation part 42.

[0024] Furthermore, the amount of movement of the roller section 31 and the hinge rod 32 in the vertical direction toward the detection section 30 is determined based on the thickness of the lever plate 4 and the configuration of the frame body 7. Moreover, the thickness of the lever plate 4 and the configuration of the frame body 7 can be appropriately determined according to the state, in conjunction with the necessary vertical movement of the detection section 30 when it is ON or OFF.

[0025] Next, the position detection method of the position detection switch unit constructed using the above method will be explained. First, as shown in FIG1, position detection switch units 1 are respectively installed at the fixed frame 22 corresponding to the connection position (front side X2) and the disconnect position (rear side X1) of the stopper mounted on the detection trolley 21. In this state, as shown in FIG6A and FIG7, the roller part 31 of the switch 3 is arranged in the opening 43, the bottom opening 84 and the notch 44 and the bottom opening 85 that are connected in the vertical direction. The switch actuation part 42 is not inserted into the lower part of the roller part 31, and the switch 3 remains OFF.

[0026] Next, the trolley 21 moves forward X2 onto the track 20 in the direction of movement X. As shown in FIG2, the trolley 21 contacts the protrusion 41 of the position detection switch unit 1 on the rear X1 side. As a result, the position detection switch unit 1 on the rear X1 side changes from the state shown in FIG6A and FIG7 to the state shown in FIG6B and FIG8, the guide part 45 is guided to slide into the guide hole 86, and the protrusion 41 moves to the inside of the frame body 7. Furthermore, the switch actuation part 42 of the lever plate 4 is inserted below the roller part 31, the roller part 31 rises, and the switch 3 is ON.

[0027] At this time, although the lever plate 4 attempts to return to its initial position (the protrusion 41 protrudes outward from the side hole 81) by means of the spring part 5, the protrusion 41 remains in contact with the trolley 21 of the stopper. That is, because the protrusion 41 is kept in the state of being pushed inward, it cannot return to its initial position, the protrusion 41 remains in the state of being moved inward, and the switch 3 remains ON. In this case, the switch 3 of the position detection switch unit 1 on the front side X2 remains OFF. In this way, the switch 3 of the position detection switch unit 1 on the rear side X1 is ON, and it can be confirmed that the stopper mounted on the trolley 21 has reached the circuit break position.

[0028] Furthermore, when the trolley 21 is moved further to the front side X2, the switch 3 of the position detection switch unit 1 of the front side X2 operates in the same way as the position detection switch unit 1 of the rear side X1 described above, and the switch 3 is ON. In this way, it can be confirmed that the blocking device mounted on the trolley 21 has reached the connection position. In this case, the switch 3 of both the position detection switch unit 1 of the front side X2 and the position detection switch unit 1 of the rear side X1 is ON.

[0029] As described above, since the position detection switch unit 1 can be installed on the stopper and the position can be detected, there is no need for a new fixture to install it on the stopper. It can be installed easily, there is no need to distinguish between different types during assembly, and assembly errors can be suppressed. Furthermore, since the position detection switch unit 1 can be formed with a simple configuration, it is easy to standardize and improve mass production.

[0030] Furthermore, since position detection is performed in the manner described above, the fixed frame 22 of the position detection switch unit 1 only needs to be positioned at the point of contact with the trolley 21 in the moving direction X. As long as the protrusion 41 can move in a horizontal direction intersecting the moving direction X, even if the position of the position detection switch unit 1 is slightly offset in the vertical direction, it will not affect the ON or OFF state of the switch 3. Therefore, confirming and adjusting the position of the position detection switch unit 1 becomes simple. In addition, the resistance to the vibration of the switch 3 caused by the opening and closing impact of the circuit breaker is improved.

[0031] Furthermore, in Embodiment 1 described above, an example was shown where the position detection target device was used as a stopper and the part to be detected was used as the trolley 21. However, this is not limited to this method; it is also feasible when the position detection target device can be the part to be detected. Furthermore, in Embodiment 1, an example was shown where two position detection switch units 1 were used to detect the positions of two parts. However, this is not limited to this method; the position detection switch unit 1 can be set according to the part whose position is to be detected. That is, if the part whose position is to be detected is a single part, the position can be detected even if only one position detection switch unit 1 is set. Moreover, the position can be detected even if three or more parts are set.

[0032] Furthermore, in terms of other position detection methods, as long as switch 3 is set from ON to OFF, it can also be used to detect when the position detection object device with the detected part leaves its position.

[0033] The position detection switch unit of Embodiment 1 constructed according to the above method detects the position of the detected part and includes: a frame body; a switch that detects the position of the detected part by moving the detection part up and down to turn ON and OFF; and a lever plate that moves the detection part up and down by inserting / pulling it out horizontally below the detection part; the lever plate has: a protrusion that can move in and out of the frame body in a horizontal direction that intersects the direction of movement relative to the horizontal direction of the detected part; and a switch actuation part that moves in and out horizontally in conjunction with the protrusion to move in and out of the frame body in the horizontal direction and inserts / pulls it out horizontally below the detection part to turn the detection part ON and OFF. Therefore, the impact on the assemblability of the position detection device can be reduced.

[0034] Moreover, in the position detection switch unit of embodiment 1 constructed according to the above method, since the aforementioned detection unit has a roller part and a hinge rod, the roller part is pushed downward by restoring force, so it is easy to insert the switch action part downward to the roller part.

[0035] Moreover, in the position detection switch unit of embodiment 1 constructed according to the above method, since it has a spring portion fixed to the aforementioned frame body, the aforementioned lever plate is connected to the aforementioned spring portion, and is pushed horizontally by the restoring force of the aforementioned spring portion, the aforementioned protrusion of the aforementioned lever plate is kept in the initial position protruding outside the aforementioned frame body, so the initial position of the protrusion can be easily maintained.

[0036] Moreover, the position detection method of Embodiment 1 constructed according to the above method is a position detection method of a position detection object device having the aforementioned detected part that moves along the aforementioned moving direction. It includes: setting the aforementioned position detection switch unit on the path of the aforementioned detected part in the aforementioned moving direction, and causing the aforementioned detected part to contact the aforementioned protrusion of the aforementioned position detection switch unit by moving in the aforementioned moving direction, so as to determine the position of the aforementioned position detection object device on the aforementioned path. Therefore, it is possible to detect the position of a part of the position detection object device having the detected part that moves along the horizontal direction.

[0037] Moreover, the position detection method of Embodiment 1 constructed according to the above method is a position detection method of a position detection object device having a detected part that moves along the aforementioned moving direction. It includes: setting the aforementioned position detection switch unit described above at a plurality of positions on the path of the detected part in the aforementioned moving direction at a predetermined distance; and sequentially contacting the aforementioned protrusion of the aforementioned position detection switch unit by moving the detected part in the aforementioned moving direction, so as to sequentially determine the position of the aforementioned position detection object device on the aforementioned path. Therefore, it is possible to detect the positions of two parts of the position detection object device having a detected part that moves along the horizontal direction.

[0038] Embodiment 2 Figure 9 is a front view showing the position detection switch unit configured according to Embodiment 2 installed in the position detection object device. In the figure, the parts that are the same as those in Embodiment 1 are given the same symbols and are omitted from the description.

[0039] In Embodiment 1 described above, as shown in FIG1, an example is illustrated where two position detection switch units 1 are arranged adjacent to each other in the movement direction X. However, this is not the only possibility. Depending on the type of interruptor, as shown in FIG9, when the positional relationship between the connected position and the disconnected position is compared with Embodiment 1, it becomes a positional relationship of separation along the movement direction X. Consequently, compared with Embodiment 1, the two position detection switch units 1 are arranged in a position of separation along the movement direction X. In this way, as long as the position detection switch unit 1 is appropriately arranged at the desired detection position, the position can be detected in the same way as in Embodiment 1. Therefore, various types of interruptors or other machines can be used as long as the machine moves in the horizontal direction.

[0040] This invention discloses various exemplary embodiments and examples. However, the various features, forms, and functions described in one or more embodiments are not limited to the applicability of a particular embodiment, but can be applied to the embodiments individually or in various combinations. Therefore, numerous variations not illustrated are conceivable within the scope of the technology disclosed in this specification. For example, these include variations, additions, or omissions of at least one constituent element, and also include extracting at least one constituent element and combining it with constituent elements of other embodiments.

[0041] Hereinafter, the various aspects disclosed in this invention will be collectively described as appendices.

[0042] (Appendix 1) A position detection switch unit, which detects the position of a detected part, comprises: a frame body; a switch that detects the position of the detected part by moving the detection part up and down to switch it on and off; and a lever plate that moves the detection part up and down by inserting / pulling it out below the detection part in a horizontal direction; the lever plate has: a protrusion that can move in and out of the frame body in a horizontal direction intersecting the direction of movement relative to the horizontal direction of the detected part; and a switch actuation part that is linked with the protrusion to move in and out of the frame body in a horizontal direction to insert / pull out below the detection part in a horizontal direction to switch the detection part on and off. (Appendix 2) The position detection switch unit as described in Appendix 1, wherein the detection part comprises: a roller part; and a hinge rod that pushes the roller part downward by a restoring force. (Note 3) The position detection switch unit as described in Note 1 or Note 2 has a spring portion fixed to the aforementioned frame body. The aforementioned lever plate is connected to the aforementioned spring portion and is pushed horizontally by the restoring force of the aforementioned spring portion. The aforementioned protrusion of the aforementioned lever plate remains in an initial position protruding outside the aforementioned frame body. (Note 4) A position measurement method is a position measurement method for a position measurement object device having the aforementioned detected part moving along the aforementioned moving direction, comprising: placing the position detection switch unit described in any one of Notes 1 to 3 on the path of the aforementioned detected part in the aforementioned moving direction, and by moving the aforementioned detected part in the aforementioned moving direction, causing it to contact the aforementioned protrusion of the aforementioned position detection switch unit, thereby measuring the position of the aforementioned position detection object device on the aforementioned path. (Appendix 5) A position measurement method is a position measurement method for a detection object device having a detection part that moves along the aforementioned moving direction, comprising: placing the aforementioned position detection switch unit mentioned in any of Appendix 1 to Appendix 3 at a plurality of locations along the path of the aforementioned detection part in the aforementioned moving direction at a predetermined distance, and sequentially contacting the aforementioned protrusion of each of the aforementioned position detection switch units by moving the aforementioned detection part in the aforementioned moving direction, thereby sequentially measuring the position of the aforementioned position detection object device on the aforementioned path. [Simplified Explanation of the Diagram]

[0008] Figure 1 is a front view showing the position detection switch unit configured according to Embodiment 1 installed in the position detection target device. Figure 2 is a top view showing the configuration of the position detection switch unit and the position detection target device shown in Figure 1. Figure 3A is a perspective view of the configuration of the position detection switch unit shown in Figure 1 as seen from above. Figure 3B is a front view showing the configuration of the position detection switch unit shown in Figure 3A. Figure 4 is a perspective view of the frame of the position detection switch unit shown in Figure 3 as seen from above. Figure 5A is a top view showing the configuration of the lever plate of the position detection switch unit shown in Figure 3. Figure 5B is a left side view showing the configuration of the lever plate shown in Figure 5A. Figure 5C is a perspective view of the configuration of the lever plate shown in Figure 5A as seen from above. Figure 5D is a perspective view of the configuration of the lever plate shown in Figure 5A as seen from below. Figure 6A is a top view showing the configuration of the frame, spring, and lever plate of the position detection switch unit shown in Figure 3 when the switch is in the OFF state. Figure 6B is a top view showing the frame, spring, and lever plate of the position detection switch unit shown in Figure 3 with the switch in the ON state. Figure 7A is a top view showing the frame, spring, lever plate, and roller of the position detection switch unit shown in Figure 3 with the switch in the OFF state, and is a top view seen from the direction of the arrow along line Z2-Z2 in Figure 7B. Figure 7B is a front view seen from the direction of the arrow along line Z1-Z1 of the position detection switch unit shown in Figure 7A. Figure 8A is a top view showing the frame, spring, lever plate, and roller of the position detection switch unit shown in Figure 3 with the switch in the ON state, and is a top view seen from the direction of the arrow along line Z4-Z4 in Figure 8B. Figure 8B is a front view seen from the direction of the arrow along line Z3-Z3 of the position detection switch unit shown in Figure 8A. Figure 9 is a front view showing the position detection switch unit configured according to Embodiment 2 installed in the position detection object device.

Claims

1. A position detection switch unit for detecting the position of a detected part, comprising: a frame; a switch that detects the position of the detected part by moving a detection part up and down to switch it on and off; and a lever plate that moves the detection part up and down by inserting / removing it horizontally below the detection part; the lever plate having: a protrusion that moves in and out of the frame in a horizontal direction intersecting a direction of movement relative to the horizontal direction of the detected part, depending on whether there is contact caused by the movement of the detected part in the aforementioned direction of movement; and a switch actuation unit that moves in and out horizontally from the frame in conjunction with the protrusion to insert / remove it horizontally below the detection part to switch the detection part on and off, the lever plate being configured to rotate within a horizontal plane containing a direction of movement of the detected part and a horizontal direction intersecting that direction of movement.

2. The position detection switch unit as described in claim 1, wherein, The aforementioned detection unit includes: a roller section; and a hinge rod, which uses a restoring force to push the aforementioned roller section downward.

3. The position detection switch unit as described in claim 1 or 2 has a spring portion fixed to the aforementioned frame body, the aforementioned lever plate is connected to the aforementioned spring portion and is pushed horizontally by the restoring force of the aforementioned spring portion, and the aforementioned protrusion of the aforementioned lever plate remains in the initial position protruding outside the aforementioned frame body.

4. A position measurement method, comprising: placing a position detection switch unit as described in claim 1 or 2 on the path of the aforementioned detected part in the aforementioned moving direction, and causing the aforementioned detected part to contact the aforementioned protrusion of the aforementioned position detection switch unit by moving in the aforementioned moving direction, thereby measuring the position of the aforementioned position measurement object device on the aforementioned path.

5. A position measurement method, comprising a position measurement object device having a detected part that moves along a moving direction, comprising: setting position detection switch units as described in claim 1 or 2 at a plurality of locations on the path of the detected part in the aforementioned moving direction at a predetermined distance, and sequentially contacting the aforementioned protrusions of each of the aforementioned position detection switch units by moving the detected part in the aforementioned moving direction, thereby sequentially measuring the position of the aforementioned position measurement object device on the aforementioned path.

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