Position detection switch unit and position detection method

Abstract

This position detection switch unit comprises: a frame body (7); a switch (3) that detects the position of a part (21) to be detected by moving a detection part (30) up and down to turn it ON and OFF; and a lever plate (4) that moves the detection part (30) up and down by being inserted and removed horizontally below the detection part (30). The lever plate (4) has: a protruding part (41) that can move in and out of the frame body (7) in a horizontal direction that intersects the moving direction (X) of the part (21) to be detected in one direction in the horizontal direction; and a switch operation part (42) that is inserted and removed horizontally below the detection part (30) in conjunction with the protruding portion (41) moving in and out of the frame body (7) in the horizontal direction, thereby turning the detection part (30) ON and OFF.

Description

Position detection switch unit and position detection method

[0001] The present disclosure relates to a position detection switch unit and a position detection method.

[0002] Conventionally, mobile equipment such as switchgear housed in a distribution panel is equipped with a switch that detects the connected and disconnected positions. This switch has the following structure. A component (hereinafter referred to as a "guide") for operating the switch is attached to the side of the circuit breaker carriage on the mobile equipment side of the switchgear. In contrast, a switch is attached to the fixed frame side where the circuit breaker is housed. This installation method uses a microswitch as the switch body. The microswitches are attached to a mounting plate according to the distance at which the circuit breaker's connected and disconnected positions are detected, and this mounting plate is attached to the side of a rail, which is a part of the fixed frame. The switch located at the rear detects the circuit breaker's connected position, and the switch located at the front detects the circuit breaker's disconnected position. The switch operates when the guide directly pushes up the hinge lever of the microswitch as the circuit breaker moves toward the rear. The connected and disconnected positions of the circuit breaker are detected based on the switch's operating timing (see, for example, Non-Patent Document 1).

[0003] Mitsubishi Electric, Mitsubishi High-Voltage Vacuum Circuit Breaker VF-20D / 25D / 32D / 40D Series, June 2020, pp. 07-12

[0004] In conventional position detection switch units and position detection methods, the amount by which the switch lever of the switch is pushed upward varies depending on the accuracy of the guide mounting position, the accuracy of the position where the microswitch is mounted on the mounting plate, and the accuracy of the position where the mounting plate is mounted on the fixing frame, as these are affected by the height dimensions of each.As a result, there was a problem in that during assembly, it was necessary to insert the circuit breaker body into the fixing frame, adjust the amount by which the switch is pushed upward depending on the combination, and check the switch operation.

[0005] The present disclosure discloses technology for solving the above-mentioned problems, and aims to provide a position detection switch unit and a position detection method that can be easily installed on a device to be detected without reducing the accuracy of position detection.

[0006] The position detection switch unit disclosed herein is a position detection switch unit that detects the position of a detectable part, comprising: a frame body, a switch that detects the position of the detectable part by moving a detection part up and down to turn it ON and OFF, and a lever plate that moves the detection part up and down by inserting and removing it horizontally below the detection part, wherein the lever plate has a protrusion that can move in and out from the frame body in a horizontal direction that intersects with one horizontal movement direction of the detectable part, and a switch operating part that inserts and removes it horizontally below the detection part in conjunction with the protrusion moving in and out horizontally from the frame body to turn the detection part ON and OFF. Also, the position detection method disclosed herein is a method for measuring the position of a device to be positioned that has a detectable part that moves in the movement direction, comprising: installing the above-described position detection switch unit on a path in the movement direction of the detectable part, and measuring the position of the device to be positioned on the path by bringing the detectable part into contact with the protrusion of the position detection switch unit as the detectable part moves in the movement direction.

[0007] According to the position detection switch unit and the position detection method of the present disclosure, the position detection switch unit and the position detection method can be easily installed on a device whose position is to be detected without reducing the accuracy of position detection.

[0008] FIG. 1 is a front view showing a state in which a position detection switch unit according to embodiment 1 is attached to a device to be subjected to position detection. FIG. 2 is a plan view showing the configuration of the position detection switch unit and the device to be subjected to position detection shown in FIG. 1. FIG. 3A is a perspective view showing the configuration of the position detection switch unit shown in FIG. 1 from above. FIG. 3B is a front view showing the configuration of the position detection switch unit shown in FIG. 3A. FIG. 4 is a perspective view showing the configuration of the frame of the position detection switch unit shown in FIG. 3 from above. FIG. 5A is a plan view showing the configuration of the lever plate of the position detection switch unit shown in FIG. 3. FIG. 5B is a left side view showing the configuration of the lever plate shown in FIG. 5A. FIG. 5C is a perspective view showing the configuration of the lever plate shown in FIG. 5A from above. FIG. 5D is a perspective view showing the configuration of the lever plate shown in FIG. 5A from below. FIG. 6A is a plan view showing the configuration of the frame, spring, and lever plate of the position detection switch unit shown in FIG. 3 when the switch is in the OFF state. FIG. 6B is a plan view showing the configuration of the frame, spring, and lever plate of the position detection switch unit shown in FIG. 3 when the switch is in the ON state. 7A is a plan view showing the configuration of the frame body, spring portion, lever plate, and roller portion of the position detection switch unit shown in FIG. 3 when the switch is in the OFF state, and is a plan view seen from the direction of the arrows line Z2-Z2 in FIG. 7B. FIG. 7B is a front view of the position detection switch unit shown in FIG. 7A when the switch is in the ON state, and is a plan view seen from the direction of the arrows line Z1-Z1 in FIG. 8A. FIG. 8B is a front view of the position detection switch unit shown in FIG. 8A when the switch is in the ON state, and is a plan view seen from the direction of the arrows line Z4-Z4 in FIG. 8B. FIG. 8B is a front view of the position detection switch unit shown in FIG. 8A when the position detection switch unit according to embodiment 2 is attached to a position detection target device.

[0009] Embodiment 1. Fig. 1 is a front view showing a state in which a position detection switch unit according to embodiment 1 is attached to a device to be subjected to position detection. Fig. 2 is a plan view showing the configuration of the position detection switch unit and the device to be subjected to position detection shown in Fig. 1. Fig. 3A is a perspective view from above showing the configuration of the position detection switch unit shown in Fig. 1. Fig. 3B is a front view showing the configuration of the position detection switch unit shown in Fig. 3A. For convenience, Fig. 3B does not show the other side surface 72 of the frame 7, which will be described later. Fig. 4 is a perspective view from above showing the configuration of the frame of the position detection switch unit shown in Fig. 3.

[0010] Fig. 5A is a plan view showing the configuration of the lever plate of the position detection switch unit shown in Fig. 3. Fig. 5B is a left side view showing the configuration of the lever plate shown in Fig. 5A. Fig. 5C is a perspective view from above showing the configuration of the lever plate shown in Fig. 5A. Fig. 5D is a perspective view from below showing the configuration of the lever plate shown in Fig. 5A. Fig. 6A is a plan view showing the configuration of the frame body, spring portion, and lever plate when the switch of the position detection switch unit shown in Fig. 3 is in the OFF state. Fig. 6B is a plan view showing the configuration of the frame body, spring portion, and lever plate when the switch of the position detection switch unit shown in Fig. 3 is in the ON state.

[0011] Fig. 7A is a plan view showing the configuration of the frame body, spring portion, lever plate, and roller portion of the position detection switch unit shown in Fig. 3 when the switch is in the OFF state, and is a plan view seen from the direction of the arrows line Z2-Z2 in Fig. 7B. Fig. 7B is a front view of the position detection switch unit shown in Fig. 7A when the switch is in the ON state, and is a plan view seen from the direction of the arrows line Z1-Z1 in Fig. 8A. Fig. 8B is a front view of the position detection switch unit shown in Fig. 8A when the switch is in the ON state, and is a plan view seen from the direction of the arrows line Z4-Z4 in Fig. 8B. Fig. 8B is a front view of the position detection switch unit shown in Fig. 8A when the switch is in the ON state, and is a plan view seen from the direction of the arrows line Z3-Z3.

[0012] First, in the first embodiment, a circuit breaker will be described as an example of a position detection target device having a detection target part, in which the position detection switch unit 1 is installed. As shown in FIGS. 1 and 2 , the detection target part is a carriage 21 on which a circuit breaker (not shown) is mounted. The carriage 21 moves on a rail 20, which serves as a path formed on a fixed frame 22 for storing the circuit breaker, to limit the movement range to only one horizontal direction when inserting or removing the circuit breaker. Therefore, the circuit breaker itself moves in one horizontal direction together with the carriage 21, which is the detection target part. In this description, the horizontal movement direction is referred to as movement direction X, and the right side (near side) on the paper surface is referred to as rear side X1, and the left side (far side) on the paper surface is referred to as front side X2. The position detection switch unit 1 is installed above the rail 20 at two locations on the fixed frame 22, spaced a predetermined distance apart in the movement direction X.

[0013] The two locations where the position detection switch unit 1 is installed are positions for detecting the connected position and the disconnected position of the circuit breaker. Here, the front side X2 of the position detection switch unit 1 is for detecting the connected position, and the rear side X1 is for detecting the disconnected position. The installation height position of the protrusion 41 of the lever plate 4 (described later) of the position detection switch unit 1 installed on the fixed frame 22 is lower than the upper surface of the carriage 21, and is at a height where the protrusion 41 of the lever plate 4 comes into contact when the carriage 21 moves in the movement direction X. This allows the position of the circuit breaker to be detected as being in the connected position or the disconnected position.

[0014] Next, the configuration of the position detection switch unit 1 will be described. As shown in Figure 3, the position detection switch unit 1 has a frame 7, a switch 3, a lever plate 4, and a spring portion 5. The switch 3 has a main body 33 and a detection portion 30, and detects the position of the cart 21 by moving the detection portion 30 up and down to turn it ON and OFF. The detection portion 30 has a roller portion 31 and a hinge lever 32, one end of which is attached to the main body 33 and which urges the roller portion 31 downward by a restoring force.

[0015] The main body 33 is fixed to the frame 7 with screws 6 via screw holes 83 (described later) in the frame 7, and does not move. In this embodiment, an example is shown in which two switches 3 are installed in the position detection switch unit 1 for redundancy, but this is not limited to this, and position detection can be performed in the same way with one switch 3. This is the same in the following embodiments, so explanations thereof will be omitted as appropriate.

[0016] As shown in Figure 4, the frame 7 has one side surface 71, the other side surface 72, and a bottom surface 73, and is formed with a generally U-shaped vertical cross section. The one side surface 71 has a locking portion 82 cut out at its lower side and protruding upward, and a screw hole 83 at its upper side. The other side surface 72 has a side hole 81 at its lower side. The bottom surface 73 has bottom openings 84 and 85 and an arc-shaped guide hole 86 at two locations.

[0017] 5 , the lever plate 4 has a protrusion 41 that can move in and out of the frame 7 in a horizontal direction intersecting the moving direction X of the carriage 21, and a switch operating portion 42 that is inserted and removed horizontally below the roller portion 31 of the detection unit 30 in conjunction with the protrusion 41 moving in and out horizontally from the frame 7 to the outside, thereby turning the detection unit 30 on and off. The switch operating portion 42 has an opening 43, a notch 44, a guide portion 45 that protrudes downward, and an elongated hole 46.

[0018] The initial position in which no external force is applied to the protrusion 41 will be described with reference to Figure 6A. The lever plate 4 is installed on the bottom surface 73 of the frame 7. The protrusion 41 of the lever plate 4 is arranged to protrude outward from a side hole 81 of the frame 7 (see Figure 3), and is configured to be able to move in and out of the frame 7 in a horizontal direction intersecting the direction of movement X of the carriage 21. The guide portion 45 of the lever plate 4 is installed by being inserted into a guide hole 86 (see Figure 3).

[0019] The spring portion 5 is engaged with the engaging portion 82, and one end of the spring portion 5 is bent, for example, into an L-shape and inserted into the elongated hole 46 of the lever plate 4. The restoring force of the spring portion 5 biases the lever plate 4 in one horizontal direction, in this case, toward the outside of the other side surface 72 of the frame 7 (see FIG. 7A). As a result, when no force is applied to the protruding portion 41, the protruding portion 41 is held in its initial position protruding outward from the side surface hole 81, as shown in FIG. 6A.

[0020] In this state, opening 43 of lever plate 4 and bottom opening 84 of frame 7 are in communication with each other in the vertical direction, and notch 44 of lever plate 4 and bottom opening 85 of frame 7 are in communication with each other. As shown in Fig. 7B, roller portion 31 is urged downward by hinge lever 32, and as shown in Fig. 7A, roller portion 31 of switch 3 is positioned in opening 43, bottom opening 84, notch 44, and bottom opening 85, which are in communication with each other in the vertical direction, with switch operating portion 42 not inserted below roller portion 31, and switch 3 remains OFF.

[0021] Next, a state in which an external force is applied to the protrusion 41 will be described with reference to Fig. 6B. When the carriage 21 applies a force in the movement direction X to the protrusion 41 of the lever plate 4, which is disposed so as to protrude outward from the side hole 81 of the frame body 7, the protrusion 41 moves inward from the side hole 81 of the frame body 7 (see Fig. 4). Naturally, a force greater than the restoring force of the spring portion 5 is applied to the lever plate 4 in the horizontal direction toward the inside of the frame body 7.

[0022] In this manner, when a force is applied to the protrusion 41, the guide portion 45 slides along the guide hole 86, and the switch actuation portion 42 moves. As the switch actuation portion 42 moves, the opening 43, the bottom opening 84, the notch 44, and the bottom opening 85 do not communicate with each other in the vertical direction.

[0023] 8A, the switch actuation portion 42 is inserted below the roller portion 31, and as shown in FIG. 8B, the roller portion 31 moves upward, turning on the switch 3. Naturally, when the switch actuation portion 42 is inserted below the roller portion 31, an upward force of a magnitude greater than the force urging the roller portion 31 downward by the hinge lever 32 is applied. When the switch actuation portion 42 is inserted below the roller portion 31, the roller portion 31 rotates, making it easier for the roller portion 31 to ride up onto the switch actuation portion 42.

[0024] The amount of vertical movement of the roller portion 31 and the detection portion 30 of the hinge lever 32 is determined by the thickness of the lever plate 4 and the configuration of the frame 7. Therefore, the thickness of the lever plate 4 and the configuration of the frame 7 are appropriately determined according to the amount of vertical movement required for turning the detection portion 30 of the switch 3 ON and OFF.

[0025] Next, a position detection method using the position detection switch unit configured as described above will be described. First, as shown in Fig. 1, a position detection switch unit 1 is installed at each location on the fixing frame 22 corresponding to the connected position (front side X2) and the disconnected position (rear side X1) of the circuit breaker mounted on the bogie 21, which require position detection. In this state, as shown in Figs. 6A and 7, in each position detection switch unit 1, the roller portion 31 of the switch 3 is positioned in the opening 43, bottom opening 84, notch portion 44, and bottom opening 85, which are connected in the vertical direction. The switch operating portion 42 is not inserted below the roller portion 31, and the switch 3 remains OFF.

[0026] Next, the carriage 21 moves on the rail 20 toward the front side X2 in the movement direction X. Then, as shown in Fig. 2, the carriage 21 comes into contact with the protrusion 41 of the position detection switch unit 1 on the rear side X1. Then, the guide portion 45 of the position detection switch unit 1 on the rear side X1 slides while being guided by the guide hole 86 from the state shown in Figs. 6A and 7 to the state shown in Figs. 6B and 8, and the protrusion 41 moves inside the frame 7. Then, the switch operating portion 42 of the lever plate 4 is inserted below the roller portion 31, the roller portion 31 rises, and the switch 3 is turned ON.

[0027] At this time, the spring portion 5 causes the lever plate 4 to return to its initial position (a state in which the protrusion 41 protrudes outward from the side hole 81), but the protrusion 41 remains in contact with the circuit breaker carriage 21. In other words, the protrusion 41 remains pressed inward and cannot return to its initial position, so the protrusion 41 remains in its inward position and the switch 3 continues to be 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 turned ON, and it can be confirmed that the circuit breaker mounted on the carriage 21 has reached the disconnecting position.

[0028] Then, as the bogie 21 is further moved to the front side X2, the switch 3 of the position detection switch unit 1 on the front side X2 operates in the same manner as the position detection switch unit 1 on the rear side X1 described above, and the switch 3 is turned ON. This confirms that the circuit breaker mounted on the bogie 21 has reached the connection position. In this case, the switches 3 of both the position detection switch unit 1 on the front side X2 and the position detection switch unit 1 on the rear side X1 are turned ON.

[0029] In this way, since the position detection switch unit 1 is installed in the circuit breaker and can detect the position, no additional jig is required for installation on the circuit breaker, allowing for easy installation, eliminating the need for type classification during assembly and reducing assembly errors. Furthermore, since the position detection switch unit 1 is formed with a simple configuration, standardization is easy and mass productivity is improved.

[0030] Furthermore, because position detection is performed in this manner, the installation position of the fixed frame 22 of the position detection switch unit 1 need only be a position that makes contact with the carriage 21 in the movement direction X, and as long as the protrusion 41 can move in the horizontal direction intersecting the movement direction X, the ON / OFF state of the switch 3 will not be affected even if the installation of the position detection switch unit 1 is slightly misaligned in the vertical direction. This makes it easy to check the installation and adjust the position of the position detection switch unit 1. In addition, the resistance of the switch 3 to chattering caused by the opening and closing impact of the circuit breaker is improved.

[0031] In the above-described first embodiment, an example was shown in which the device to be inspected for position is a circuit breaker and the part to be detected is the bogie 21, but this is not limiting and the device to be inspected for position can also be the part to be detected. Also, in the first embodiment, an example was shown in which two position detection switch units 1 are used to detect the positions of two locations, but this is not limiting and the position detection switch units 1 may be installed according to the location of the position to be detected. In other words, if the location to be detected for position is one, the same position detection can be achieved by installing one position detection switch unit 1. Furthermore, the same position detection can be achieved even if there are three or more locations.

[0032] As another position detection method, when the switch 3 changes from ON to OFF, it is possible to detect that the device to be detected, which has the detection target part, has moved away from its position.

[0033] According to the position detection switch unit of embodiment 1 configured as described above, the position detection switch unit detects the position of the part to be detected and includes a frame body, a switch that detects the position of the part to be detected by moving a detection part up and down to turn it ON and OFF, and a lever plate that moves the detection part up and down by inserting and removing it horizontally under the detection part, wherein the lever plate has a protrusion that can move in and out from the frame body in a horizontal direction that intersects with the one horizontal movement direction of the part to be detected, and a switch operating part that inserts and removes it horizontally under the detection part in conjunction with the protrusion moving in and out horizontally from the frame body to the outside, to turn the detection part ON and OFF, thereby reducing the impact of the position detection device on assembling.

[0034] Furthermore, according to the position detection switch unit of embodiment 1 configured as described above, the detection unit includes a roller portion and a hinge lever that urges the roller portion downward by a restoring force, making it easy to insert the switch operating portion below the roller portion.

[0035] Furthermore, according to the position detection switch unit of embodiment 1 configured as described above, it has a spring portion fixed to the frame body, the lever plate is connected to the spring portion and is urged horizontally by the restoring force of the spring portion, and the protruding portion of the lever plate maintains its initial position protruding outside the frame body, so that the initial position of the protruding portion can be easily maintained.

[0036] Furthermore, according to the position detection method of the first embodiment configured as described above, in a method for measuring the position of a device to be positioned that has a detectable part that moves in the movement direction, the position detection switch unit described above is installed on a path in the movement direction of the detectable part, and the movement of the detectable part in the movement direction brings it into contact with the protrusion of the position detection switch unit, thereby measuring the position of the device to be positioned on the path. Therefore, it is possible to detect the position of one point on a device to be positioned that has a detectable part that moves in the horizontal direction.

[0037] Furthermore, according to the position detection method of embodiment 1 configured as described above, in the method for measuring the position of a device to be positioned that has a detectable part that moves in the movement direction, the position detection switch units described above are installed at multiple locations on the path of the movement direction of the detectable part, spaced apart by a predetermined distance, and the position of the device to be positioned that has a detectable part that moves in the movement direction is sequentially brought into contact with the protrusion of each position detection switch unit as the detectable part moves in the movement direction, thereby sequentially measuring the position of the device to be positioned that has a detectable part that moves in the horizontal direction.Therefore, it is possible to detect two positions of a device to be positioned that has a detectable part that moves in the horizontal direction.

[0038] 9 is a front view showing a state in which a position detection switch unit according to embodiment 2 is attached to a device whose position is to be detected. In the figure, parts that are the same as those in embodiment 1 above are assigned the same reference numerals and are omitted.

[0039] In the first embodiment described above, as shown in Fig. 1, an example has been shown in which two position detection switch units 1 are installed adjacent to each other in the direction of movement X, but this is not limited to this, and depending on the type of circuit breaker, the positional relationship between the connected position and the disconnected position may be farther apart in the direction of movement X than in the first embodiment, as shown in Fig. 9, and accordingly the two position detection switch units 1 may be installed at positions farther apart in the direction of movement X than in the first embodiment. In this way, by appropriately installing the position detection switch unit 1 at the position where detection is desired, position detection is possible as in the first embodiment. Therefore, the present invention can be adopted for various types of circuit breakers or other equipment as long as it is equipment that moves horizontally.

[0040] Although various exemplary embodiments and examples are described in this disclosure, the various features, aspects, and functions described in one or more embodiments are not limited to the application of a particular embodiment, but may be applied to the embodiments alone or in various combinations. Therefore, countless variations not illustrated are anticipated within the scope of the technology disclosed in this specification. For example, this includes cases where at least one component is modified, added, or omitted, or where at least one component is extracted and combined with components of another embodiment.

[0041] Various aspects of the present disclosure are summarized below as appendices.

[0042] (Supplementary Note 1) A position detection switch unit that detects the position of a detectable part, comprising: a frame body, a switch that detects the position of the detectable part by moving a detection part up and down to turn it ON and OFF, and a lever plate that moves the detection part up and down by inserting and removing it horizontally under the detection part, wherein the lever plate has: a protrusion that can move in and out from the frame body in a horizontal direction that intersects with one horizontal movement direction of the detectable part, and a switch operating part that inserts and removes it horizontally under the detection part in conjunction with the protrusion moving in and out horizontally from the frame body to turn the detection part ON and OFF. (Supplementary Note 2) The position detection switch unit according to Supplementary Note 1, wherein the detection part comprises: a roller part, and a hinge lever that urges the roller part downward by a restoring force. (Supplementary Note 3) The position detection switch unit according to Supplementary Note 1 or Supplementary Note 2, having a spring portion fixed to the frame, the lever plate being connected to the spring portion and urged horizontally by the restoring force of the spring portion, and maintaining an initial position in which the protruding portion of the lever plate protrudes outside the frame. (Supplementary Note 4) A method for measuring the position of a device to be positioned that has a detectable portion that moves in the movement direction, comprising: installing the position detection switch unit according to any one of Supplementary Note 1 to Supplementary Note 3 on a path in the movement direction of the detectable portion; and measuring the position of the device to be positioned on the path by bringing the detectable portion into contact with the protruding portion of the position detection switch unit as the detectable portion moves in the movement direction. (Supplementary Note 5) A method for measuring the position of a device to be positioned that has a detectable part that moves in the movement direction, comprising: installing the position detection switch units described in any one of Supplementary Note 1 to Supplementary Note 3 at a plurality of locations on a path in the movement direction of the detectable part, each at a predetermined distance apart; and sequentially contacting the protrusion of each position detection switch unit as the detectable part moves in the movement direction, thereby sequentially measuring the position of the device to be positioned on the path.

[0043] 1 Position detection switch unit, 20 Rail, 21 Dolly, 22 Fixed frame, 3 Switch, 30 Detection section, 31 Roller section, 32 Hinge lever, 33 Main body, 4 Lever plate, 41 Protrusion section, 42 Switch operating section, 43 Opening section, 44 Notch section, 45 Guide section, 46 Slotted hole, 5 Spring section, 6 Screw, 7 Frame body, 71 One side surface, 72 Other side surface, 73 Bottom surface, 81 Side hole, 82 Locking section, 83 Screw hole, 84 Bottom opening, 85 Bottom opening, 86 Guide hole, X Movement direction, X1 Rear side, X2 Front side.

Claims

1. A position detection switch unit that detects the position of a detectable part, comprising: a frame; a switch that detects the position of the detectable part by moving a detection part up and down to turn it ON and OFF; and a lever plate that moves the detection part up and down by inserting and removing it horizontally under the detection part, wherein the lever plate has a protrusion that can move in and out from the frame in a horizontal direction that intersects with the one horizontal movement direction of the detectable part, and a switch operating part that inserts and removes it horizontally under the detection part in conjunction with the protrusion moving in and out horizontally from the frame to the outside, turning the detection part ON and OFF.

2. A position detection switch unit as described in claim 1, wherein the detection section comprises a roller section and a hinge lever that urges the roller section downward by a restoring force.

3. A position detection switch unit as described in claim 1 or claim 2, which has a spring portion fixed to the frame body, the lever plate is connected to the spring portion and is urged horizontally by the restoring force of the spring portion, and the protruding portion of the lever plate is maintained in an initial position protruding outside the frame body.

4. A method for measuring the position of a device to be positioned that has a detectable part that moves in the movement direction, comprising: installing the position detection switch unit described in any one of claims 1 to 3 on a path in the movement direction of the detectable part; and measuring the position of the device to be positioned on the path by bringing the detectable part into contact with the protruding part of the position detection switch unit as the detectable part moves in the movement direction.

5. A method for measuring the position of a device to be positioned that has a detectable part that moves in the movement direction, comprising: installing the position detection switch units described in any one of claims 1 to 3 at a plurality of locations spaced a predetermined distance apart on a path in the movement direction of the detectable part; and sequentially measuring the position of the device to be positioned on the path by sequentially bringing the detectable part into contact with the protruding part of each position detection switch unit as it moves in the movement direction.

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