Frame body

Abstract

The invention provides a frame body. The frame body comprises a mechanism capable of adjusting the relative relation between a sensor arranged in the frame body and a detection object as a detection object of the sensor from the outside of the frame body. The housing (1) is provided with: a sensor (30) provided inside the housing (1); a detection body (12) to be detected by the sensor; and an adjustment unit (20) that adjusts the relative relationship between the sensor (30) and the detection body (12) from the outside of the housing. Thus, since the relative relationship between the sensor (30) and the detection body (12) can be adjusted from the outside of the housing (1), the relative relationship between the sensor (30) and the detection body (12) in the housing (1) can be safely adjusted even in an explosive environment.

Description

Technical Field

[0001] This invention relates to frames. Background Technology

[0002] Previously, mechanisms for adjusting the position of a sensor that detects the opening and closing of a main valve in devices equipped with a main valve were known. For example, Patent Document 1 discloses an exhaust device for a ventilation chamber that has a mechanism for adjusting the position of a limit switch that detects the opening and closing of a flow regulating valve in a ventilation chamber equipped with a flow regulating valve.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Publication No. 2003-106590 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] The exhaust device of the ventilation chamber disclosed in Patent Document 1 is configured to be able to infinitely rotate and adjust the mounting plate of the limit switch around the axis of rotation of the flow regulating valve, so as to adjust the installation position of the limit switch.

[0008] However, in Patent Document 1, when adjusting the position of the limit switch, it is necessary to remove the outer cover of the motor that operates the flow regulating valve. Therefore, when the conventional exhaust device is placed in an explosive gas vapor environment generated by flammable and combustion-supporting substances, if the outer cover is removed, the part that could cause an electric spark to ignite or overheating due to electrical equipment failure (the ignition source) will be exposed to the explosive gas vapor environment. Therefore, there is a problem that, in order to prevent fire or explosion, the outer cover of the frame cannot be removed to adjust the setting position of sensors such as limit switches in the frame.

[0009] In addition, not only do exhaust devices with limit switches have the following problems as mentioned above, but the housing with sensors also has the following problems: even if it is not exposed to explosive gases, the outer cover needs to be removed. Furthermore, depending on the situation, other parts need to be removed in order to remove the outer cover, so the maintainability is poor and the relative relationship between the sensor and the object being detected cannot be easily adjusted.

[0010] The present invention was made in view of this situation, and its object is to provide a frame having a mechanism for adjusting the relative relationship between the sensor and the detection object from the outside of the frame without disassembling the outer cover of the frame in which sensors such as limit switches are installed.

[0011] Solution to the problem

[0012] The present invention is an invention that solves the above-mentioned problems. One embodiment of the present invention involves a frame comprising: a sensor disposed inside the frame; a detection body, which is the detection object of the sensor; and an adjustment part for adjusting the relative relationship between the sensor and the detection body from outside the frame.

[0013] The effects of the invention

[0014] According to one embodiment of the present invention, a frame includes an adjustment part for adjusting the relative relationship between a sensor and a detection body disposed inside the frame from the outside of the frame.

[0015] Therefore, the relative relationship between the sensor and the detection object located inside the frame can be adjusted without disassembling the outer cover of the frame. Attached Figure Description

[0016] Figure 1 This is a front sectional view showing an example of the frame 1 according to an embodiment of the present invention.

[0017] Figure 2 This is a top sectional view showing an example of the frame 1 according to an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram illustrating the adjustment mechanism involved in an embodiment of the present invention.

[0019] Figure 4 This is an enlarged view of the cover 50 according to an embodiment of the present invention.

[0020] Figure 5 This is a front view showing an example of a fluid pressure driven valve 4 having a frame 1 according to an embodiment of the present invention. Detailed Implementation

[0021] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

[0022] (Implementation Method)

[0023] Figure 1 This is a front sectional view showing an example of the frame 1 according to an embodiment of the present invention. Figure 2 This is a top cross-sectional view showing an example of the frame 1 according to an embodiment of the present invention. Furthermore, Figure 1 It is along Figure 2 A sectional view along line ii.

[0024] The frame 1 is a box that forms the appearance or shape of the device or equipment, and usually houses electrical equipment or machinery. The frame 1 has a generally rectangular shape. The frame 1 is composed of an upper frame 2 and a lower frame 3. That is, the frame 1 can be separated into the upper frame 2 and the lower frame 3, and when the upper frame 2 is stacked on top of the lower frame 3, the interior of the frame 1 is sealed. In addition, the frame 1 is made of metal materials such as aluminum.

[0025] In this embodiment, the case where the frame 1 functions as the frame of the solenoid valve 100 will be described. That is, the solenoid valve 100 includes the frame 1 and the slide valve 101 (described later).

[0026] The frame 1 includes a rotating shaft 10 connecting the inside and outside of the frame 1, a detection body 12, a crank 11 with a crank groove 11a, a guide plate 13 with a cam groove 13a, a first sensor 30, a second sensor 31, a first adjustment part 20, and a second adjustment part 21.

[0027] The rotating shaft 10 is formed in the shape of a shaft and is configured to communicate between the interior and exterior of the frame 1. The rotating shaft 10 is connected to a main valve (described later), for example, and rotates as the main valve is opened and closed.

[0028] The detection body 12 is a movable body that can move inside the frame 1, and is the object of detection by the first sensor 30 and the second sensor 31. The detection body 12 can move with the rotation of the rotation axis 10. The detection body 12 is a rod-shaped component.

[0029] The frame 1 includes a crank 11, a crank groove 11a, a guide plate 13, and a cam groove 13a as a cam mechanism that allows the detection body 12 to move in a straight line as the rotating shaft 10 rotates.

[0030] The crank 11 is constructed from a long, plate-like component. A rotating shaft 10 extends through one end of the crank 11 along its long side. The crank 11 and the rotating shaft 10 are fixed to each other. The crank 11 rotates around the axis of the rotating shaft 10 as the shaft rotates. A straight, elongated hole, namely a crank groove 11a, is formed in the crank 11, extending away from the rotating shaft 10. The detection body 12 is movably supported in the crank groove 11a along its long side.

[0031] The guide plate 13 is made of a flat plate. The guide plate 13 is positioned below the crank 11. The guide plate 13 is supported on the lower part 3 of the frame in such a way that its surface is orthogonal to the axial direction of the rotating shaft 10. The cam groove 13a has a straight elongated hole and a semi-circular elongated hole connecting its upper and lower ends. The detection body 12 can move along the cam groove 13a as the rotating shaft 10 rotates.

[0032] That is, if the rotating axis 10 rotates counterclockwise, the detection body 12 will move in a straight line towards... Figure 2 The object moves in the direction shown on the paper. If the rotating shaft 10 rotates clockwise, the detection body 12 moves in a straight line towards the paper. Figure 2 It moves downwards from the paper.

[0033] The first sensor 30 and the second sensor 31 are sensors that detect the object 12. The first sensor 30 and the second sensor 31 detect the predetermined position of the object 12 by abutting against it. For example, the first sensor 30 and the second sensor 31 use limit switches as position detection sensors to detect the predetermined position of the object 12. The limit switch includes an actuator, a housing, an internal switch, and a switch housing. The actuator transmits the force or action received from the object 12 to the internal switch via an internal plunger. The internal switch instantaneously switches on and off via a quick-acting mechanism. An external connection is made via a cable to the terminals of the internal switch to supply power and send signals. The switch housing protects the internal switch.

[0034] The detection body 12 pushes against the actuator of the first sensor 30 or the actuator of the second sensor 31. Specifically, when the detection body 12 reciprocates linearly with the rotation of the rotating shaft 10, after the detection body 12 pushes against the actuator of the first sensor 30, the force is transmitted via a plunger to the built-in switch inside the first sensor 30. After the built-in switch is energized by the pushing operation, it sends a signal to the outside indicating that the detection body 12 has been detected.

[0035] The first adjustment unit 20 includes a first guide rail 22, a first base 24, a first drive member 26, and a first conversion mechanism 28. Similarly, the second adjustment unit 21 includes a second guide rail 23, a second base 25, a second drive member 27, and a second conversion mechanism 29. The first adjustment unit 20 and the second adjustment unit 21 adjust the predetermined position of the detection body 12 by adjusting the installation positions of the first sensor 30 and the second sensor 31 in the adjustment frame 1, respectively.

[0036] The first guide rail 22 and the second guide rail 23 are straight guide rails laid parallel to any side of the rectangular bottom surface of the frame 1. The long side direction of the straight portion of the cam groove 13a, the long side direction of the first guide rail 22, and the long side direction of the second guide rail 23 are all parallel to each other.

[0037] A first base 24 and a second base 25 are respectively supported on the first guide rail 22 and the second guide rail 23. In addition, the first base 24 and the second base 25 can move in a straight line along the long side of the straight section of the corresponding guide rail and cam groove 13a on the first guide rail 22 and the second guide rail 23, respectively.

[0038] The first base 24 and the second base 25 respectively support the first sensor 30 and the second sensor 31. That is, the first sensor 30 and the second sensor 31 are respectively mounted on the upper part of the first base 24 and the upper part of the second base 25. In addition, the first base 24 and the second base 25 each have a hole extending in a straight line. A threaded groove is formed on the inner circumference of each hole. The corresponding first drive member 26 and second drive member 27 are screwed into and pass through each hole.

[0039] The first driving member 26 and the second driving member 27 are each formed as rod-shaped members with at least one end protruding outside the frame 1, and are rotatably supported on the frame 1 about an axis in the long side direction. Threads are formed on the outer periphery of the rod-shaped members. Furthermore, a first operating portion 26a and a second operating portion 27a are formed at one end of the first driving member 26 and one end of the second driving member 27 protruding outside the frame 1, respectively. Specifically, the first operating portion 26a and the second operating portion 27a are formed with shapes conforming to tools such as screwdrivers. Therefore, tools such as screwdrivers can be connected to the first operating portion 26a or the second operating portion 27a, and the tools can be used to rotate the first driving member 26 or the second driving member 27 about their respective axes. The first drive member 26 or the second drive member 27, which rotates in a specified direction, is screwed into the corresponding first platform 24 or the second platform 25, thereby enabling the corresponding first platform 24 or the second platform 25 to move along the corresponding first guide rail 22 or the second guide rail 23.

[0040] The first conversion mechanism 28 includes threads on the outer periphery of the first drive member 26 and threaded grooves on the inner periphery of the hole in the first base 24. Through the engagement of the threaded groove in the first conversion mechanism 28 (i.e., the first base 24) with the threads on the first drive member 26, the rotational motion of the first drive member 26 can be converted into linear motion of the first base 24 along the first guide rail 22. Similarly, the second conversion mechanism 29 includes threads on the outer periphery of the second drive member 27 and threaded grooves on the inner periphery of the hole in the second base 25. Through the engagement of the threaded groove in the second conversion mechanism 29 (i.e., the second base 25) with the threads on the second drive member 27, the rotational motion of the second drive member 27 can be converted into linear motion of the second base 25 along the second guide rail 23.

[0041] The solenoid section 40 includes a solenoid housing, an electromagnetic coil (not shown) housed within the solenoid housing, and a movable iron core (not shown) movably disposed within the electromagnetic coil. When the frame 1 functions as the frame of the solenoid valve 100, the drive device 200 (described later) connected to the solenoid valve 100 is operated by switching the energization state of the solenoid section 40. The detailed operation of the solenoid valve 100 will be described below.

[0042] Figure 3 This is a schematic diagram illustrating an example of an adjustment mechanism involved in an embodiment of the present invention.

[0043] The first adjustment unit 20 and the second adjustment unit 21 adjust the placement positions of the first sensor 30 and the second sensor 31 inside the housing 1 via the first conversion mechanism 28 and the second conversion mechanism 29, respectively, thereby adjusting the predetermined position of the detection body 12. The predetermined position of the detection body 12 refers to the position of the rotating shaft 10, which rotates as the detection body 12 reciprocates linearly, in a specific state. The specific state of the rotating shaft 10 refers, for example, the state of the rotating shaft 10 when the main valve connected to the rotating shaft 10 is fully open, or the state of the rotating shaft 10 when the main valve is fully closed. That is, the first adjustment unit 20 and the second adjustment unit 21 can adjust the relative relationship between the first sensor 30 and the detection body 12 or the second sensor 31 and the detection body 12 from outside the housing 1.

[0044] Figure 3 The diagram shows the positional relationship between the cam groove 13a, the detection body 12 embedded in the cam groove 13a, the first sensor 30, and the second sensor 31 when viewed from above inside the frame 1. Figure 3 Three positional relationships are shown in the diagram. Figure 3 In the various figures, for a single cam groove 13a, two detectors 12 are shown spaced apart vertically on the paper. This figure shows the detectors 12 when they reach two predetermined positions via the rotational movement of the rotating shaft 10. In fact, as... Figure 1 and Figure 2 As shown, there is one detector, 12. Figure 3 In this design, for example, the detector 12 located below the paper surface of the cam groove 13a represents the detector 12 that has reached a predetermined position indicating that the main valve is fully open. On the other hand, the detector 12 located above the paper surface represents the detector 12 that has reached a predetermined position indicating that the main valve is fully closed. The first sensor 30 and the second sensor 31 are positioned at positions corresponding to the predetermined positions reached by the detector 12.

[0045] exist Figure 3 In the central part of the diagram, two detectors 12 are shown near the center of the cam groove 13a. A first sensor 30 and a second sensor 31 are positioned corresponding to each detector 12. Figure 3 The diagram shown on the left is the same as Figure 3 Compared to the diagram shown in the center, the positions of the two sensing bodies 12 are offset towards the top of the paper. This could occur, for example, when the rotating shaft 10 is disassembled and reinstalled during maintenance, or when the position of the main valve at full open / full closed is offset from the position of the rotating shaft 10 due to aging.

[0046] That is, in Figure 3 In the left-hand diagram, for example, a rotating shaft 10 is shown mounted counterclockwise on the main valve. In this case, it is necessary to adjust the positions of the first sensor 30 and the second sensor 31 so that the detection body 12 corresponds to a predetermined position. The method for adjusting the position of the first sensor 30 is to connect a tool such as a screwdriver to the first operating part 26a and rotate the first drive member 26 counterclockwise, for example, thereby causing the first sensor 30 to move away from the first operating part 26a, i.e., towards... Figure 3 The sensor moves in the direction above the paper. The second sensor 31 is also moved using the same position adjustment method. This allows for the adjustment of the positions of the first sensor 30 and the second sensor 31.

[0047] Figure 3 The diagram shown on the right is the same as Figure 3 Compared to the diagram shown in the center, the positions of the two detectors 12 are offset towards the lower part of the paper. Figure 3 In the diagram on the right, for example, a rotating shaft 10 is shown mounted to the main valve with a clockwise offset. In this case, it is also necessary to adjust the positions of the first sensor 30 and the second sensor 31 so that the detection body 12 corresponds to a predetermined position. A tool such as a screwdriver is connected to the first operating part 26a, and the first drive member 26 is rotated, for example, clockwise, thereby causing the first sensor 30 to move closer to the first operating part 26a, i.e., towards... Figure 3 The sensor moves in the direction below the paper. The second sensor 31 is also moved using the same position adjustment method. This allows for the adjustment of the positions of the first sensor 30 and the second sensor 31.

[0048] Furthermore, while the above description illustrates adjusting the positions of both sensors, the first sensor 30 and the second sensor 31, above or below the paper, it is also possible to adjust the position of only either sensor 30 or the second sensor 31. Additionally, the adjustment directions for the two sensors can differ; that is, the first sensor 30 can be adjusted above the paper, and the second sensor 31 can be adjusted below the paper.

[0049] Figure 4 This is an enlarged view showing an example of the cover 50 according to an embodiment of the present invention. As a matter that should be particularly explained in relation to the frame 1 according to this embodiment, the cover 50 that is installed on the side of the frame 1 is described.

[0050] The cover 50 functions to cover the first operating part 26a and the second operating part 27a. By installing the cover 50 on the first operating part 26a and the second operating part 27a, the installation position of the first sensor 30 or the second sensor 31 in the frame 1 is prevented from accidentally moving if the operator accidentally touches the first operating part 26a or the second operating part 27a. If the operator wants to adjust the installation position of the first sensor 30 or the second sensor 31, the cover 50 can be removed to adjust the position.

[0051] (Structure and implementation of fluid pressure driven valve)

[0052] Figure 5 This is a front view showing an example of a fluid pressure driven valve 4 having a frame 1 according to an embodiment of the present invention.

[0053] The frame 1 is used, for example, as the frame of the solenoid valve 100 constituting the fluid pressure driven valve 4. The fluid pressure driven valve 4 includes: a main valve 300 disposed in the middle of the piping 310; a drive device 200 that drives the rotating shaft 10 connected to the main valve 300 according to the fluid pressure of the drive fluid, thereby performing the opening and closing operation of the main valve 300; and a solenoid valve 100 that has the function of controlling the supply or discharge of drive fluid to the drive device 200.

[0054] Fluid pressure driven valve 4 is installed, for example, in piping 310 through which various gases or oils flow in plant equipment, and is used as an emergency shut-off valve to cut off the flow in piping 310 in the event of an emergency stop such as an abnormality in the plant equipment. Furthermore, the location or application of fluid pressure driven valve 4 is not limited to the examples described above.

[0055] As an example of the driving fluid, air is supplied from an air supply source (not shown) to the fluid pressure driven valve 4. The air from the air supply source is supplied to the solenoid valve 100 via a first air pipe (not shown), and further to the drive device 200 via a second air pipe 220. Additionally, the fluid pressure driven valve 4 is connected to a cable (not shown) for supplying power to the solenoid valve 100 from an external power source (not shown). Furthermore, the driving fluid is not limited to air; it can be other gases or liquids (e.g., oil).

[0056] In this embodiment, the fluid pressure driven valve 4 is an air-to-open fluid pressure driven valve. Therefore, during stable operation, air is supplied to the drive device 200 from an air supply source (not shown) via the solenoid valve 100 (intake), which fully opens the main valve 300. During emergency stop or test operation, air is discharged from the drive device 200 via the solenoid valve 100 (exhaust), which fully closes the main valve 300. Alternatively, the fluid pressure driven valve 4 can also be an air-to-close fluid pressure driven valve. In this case, the drive device 200 can be fully opened by supplying air to it, and the main valve 300 can be fully closed by discharging air from the drive device 200.

[0057] The main valve 300 is, for example, a valve called a ball valve. As an example of the structure of the main valve 300, it includes a valve housing 320 disposed midway through a piping 310, and a spherical valve body 321 rotatably disposed within the valve housing 320. The upper part of the valve body 321 is connected to the first end of a rotating shaft 10. As the rotating shaft 10 is driven to rotate from 0 degrees to 90 degrees, the valve body 321 rotates within the valve housing 320, and the main valve 300 is in a fully open state (…). Figure 5 The state shown is switched between fully closed and open. Furthermore, the valve used as the main valve 300 is not limited to a ball valve; it can also be a butterfly valve or other similar valve.

[0058] The drive unit 200 is, for example, disposed between the main valve 300 and the solenoid valve 100, and is configured as a single-acting cylinder mechanism. As an example of the structure of the drive unit 200, it includes: a cylindrical working cylinder 210; a pair of pistons 212A and 212B, which are reciprocating linearly within the working cylinder and connected via a piston rod 211; a coil spring 213 disposed on the side of the first piston 212A; an air inlet / outlet port 214 formed on the side of the second piston 212B; and a transmission mechanism 215 disposed at the portion of the rotating shaft 10 orthogonal to the piston rod 211, which is arranged to pass through the working cylinder 210 in a diametrical direction. Furthermore, the drive unit 200 is not limited to a single-acting type; for example, it may be configured as a double-acting type or other forms.

[0059] The first piston 212A is pressed against the helical spring 213 in the direction of closing the main valve 300. The second piston 212B is pushed against the pressing force of the helical spring 213 by the air supplied from the air inlet / outlet 214 (intake air) in the direction of opening the main valve 300. The transmission mechanism 215 is composed of, for example, a rack and pinion mechanism, a linkage mechanism, a cam mechanism, etc., which converts the reciprocating linear motion of the piston rod 211 into rotational motion and transmits it to the rotating shaft 10.

[0060] The rotating shaft 10 is configured to rotatably extend through the drive unit 200. A first end of the rotating shaft 10 is connected to the main valve 300, and a second end of the rotating shaft 10 is supported by the solenoid valve 100. Alternatively, the rotating shaft 10 may be a rotating shaft formed by connecting multiple drive shafts, for example, through coupling.

[0061] The solenoid valve 100 has the function of controlling the supply or discharge of air to the drive device 200, and is configured as a normally closed (open when energized, closed when not energized) two-position three-way solenoid valve. Outside the housing 1, which functions as the casing of the indoor or explosion-proof solenoid valve 100, the solenoid valve 100 includes a slide valve 101 that switches the flow path of the air. Inside the housing 1, the solenoid valve 100 includes a solenoid section (not shown) that moves the slide valve 101 according to the energized state (energized or not energized). The solenoid valve 100 is not limited to a normally closed two-position three-way solenoid valve; it can be a three-position, normally open, or four-way solenoid valve, and can be configured in various combinations. Furthermore, although in this embodiment the solenoid valve 100 is used as a pilot valve in the fluid pressure driven valve 4, its application is not limited to this.

[0062] The slide valve 101 includes an input port connected to an air supply source via a first air pipe, an output port connected to an actuator 200 via a second air pipe 220, and an exhaust port for discharging exhaust from the actuator 200.

[0063] When the solenoid is energized, it moves the slide valve 101 to connect the input port and the output port. When it is not energized, it moves the slide valve 101 to connect the output port and the exhaust port.

[0064] Therefore, when the solenoid valve 100 is energized, air (intake) from the air supply source flows in the order of the first air pipe, input port, output port, and second air pipe 220, and is supplied to the air inlet / outlet port 214. This causes the second piston 212B to be pushed, compressing the coil spring 213. Subsequently, the piston rod 211 moves with the compression of the coil spring 213. Correspondingly, after the rotating shaft 10 is driven to rotate via the piston rod 211 and the transmission mechanism 215, the valve body 321 rotates within the valve box 320, and the main valve 300 is operated to become fully open.

[0065] On the other hand, when the solenoid valve 100 is not energized, the air (exhaust) in the working cylinder 210 flows from the air inlet / outlet port 214 in the order of the second air pipe 220, the output port, and the exhaust port, and is discharged to the external gas. As a result, the pushing force of the second piston 212B decreases, and the coil spring 213 returns to its compressed state. Then, the piston rod 211 moves as the coil spring 213 returns to its compressed state. Correspondingly, after the rotating shaft 10 is rotated via the transmission mechanism 215, the valve body 321 rotates within the valve box 320, and the main valve 300 is operated to become fully closed.

[0066] (Other implementation methods)

[0067] While the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and appropriate modifications can be made without departing from the technical concept of the present invention. Moreover, these modified embodiments are all included in the technical concept of the present invention.

[0068] For example, in the above embodiment, the sensor disposed inside the frame 1 is described as a limit switch that detects a predetermined position indicating that the movable detection body 12 is in a specific state, and two sensors, a first sensor 30 and a second sensor 31, are provided. However, the first sensor 30 and the second sensor 31 can also be non-contact position detection sensors. As long as the detection object is the detection body 12, the first sensor 30 and the second sensor 31 are not limited to position detection sensors and can be other types of sensors. Moreover, the number of sensors can be one or multiple sensors.

[0069] Furthermore, although the frame 1 is described as an internally sealed container in the above embodiments, it does not necessarily need to be completely sealed; gaps or openings are also permitted. Moreover, the frame 1 can be not only sealed but also equipped with explosion-proof measures. In this case, to designate the frame 1 as an explosion-proof container, it must meet explosion-proof design requirements. For example, the gap between the mating surfaces of the first drive member 26 or the second drive member 27 opposite to the frame 1 must be less than a specified length relative to the thickness of the frame 1. The other gaps or openings mentioned above must also meet explosion-proof design requirements. In addition, the explosion-proof category only needs to meet appropriate explosion-proof design requirements consistent with the purpose of the frame, such as pressure-resistant explosion-proof, dust explosion-proof, or intrinsically safe explosion-proof.

[0070] Furthermore, although the above embodiment describes that the detection body 12 can move inside the frame 1, the detection body 12 can also move outside the frame 1, as long as the specified relative relationship between the first sensor 30 or the second sensor 31 disposed inside the frame 1 and the detection body 12 can be specified.

[0071] Furthermore, although the above embodiment describes that the frame 1 has a rotation axis 10 that connects the interior and exterior of the frame 1, the frame 1 may not have a rotation axis 10 as long as the detection body 12 is movable.

[0072] Furthermore, although the above embodiment describes that the frame 1 has a solenoid section 40 which has a coil for operating the slide valve 101, the frame 1 may also not have a solenoid section 40.

[0073] Furthermore, in the above embodiment, although it is described that after applying rotational force to one end of the first drive member 26 and one end of the second drive member 27, the first conversion mechanism 28 and the second conversion mechanism 29 convert the rotational motion of the first drive member 26 and the second drive member 27 into linear motion of the first platform 24 and the second platform 25 along the first guide rail 22 and the second guide rail 23 by the engagement of the thread teeth of the first drive member 26 and the second drive member 27 with the thread grooves of the first platform 24 and the second platform 25, any conversion mechanism that converts the rotational motion of the first drive member 26 and the second drive member 27 into linear motion of the first platform 24 and the second platform 25 along the first guide rail 22 and the second guide rail 23 by applying rotational force to one end of the first drive member 26 and one end of the second drive member 27 can also be any conversion mechanism such as a gear mechanism.

[0074] Furthermore, in the above embodiment, although the first adjustment unit 20 and the second adjustment unit 21 are provided in accordance with the number of sensors, the number of adjustment units does not need to correspond to the number of sensors. There may be one adjustment unit for multiple sensors, and the number of adjustment units may be more than the number of sensors.

[0075] As described above, the frame 1 according to the above embodiment includes: a sensor disposed inside the frame; a detection body, which is the object detected by the sensor; and an adjustment unit for adjusting the relative relationship between the sensor and the detection body from outside the frame. Therefore, even without disassembling the outer cover of the frame, the relative relationship between the sensor and the detection body disposed inside the frame can be adjusted from outside the frame. This allows for easy adjustment of the relative relationship between the sensor and the detection body within the frame. Furthermore, this means that, for example, even if the frame is placed in an explosive atmosphere, the relative relationship between the sensor and the detection body within the frame can be safely adjusted without disassembling the outer cover of the frame.

[0076] Furthermore, the sensor is a position detection sensor that detects a predetermined position of the detection object, and the adjustment unit adjusts the predetermined position of the detection object as a relative relationship. Therefore, the predetermined position of the detection object can be easily adjusted. Additionally, this allows for safe adjustment of the predetermined position of the detection object even if the frame is placed in an explosive atmosphere, for example, without disassembling the outer casing of the frame.

[0077] Furthermore, the adjustment unit adjusts the predetermined position of the detection body by adjusting the placement of the sensors within the housing. This allows for easy adjustment of the predetermined position of the detection body simply by adjusting the placement of the sensors within the housing. Additionally, this means that even if the housing is placed in an explosive atmosphere, the placement of the sensors within the housing can be adjusted without disassembling the housing's outer cover, thereby safely adjusting the predetermined position of the detection body.

[0078] Furthermore, the detector is a movable body that can move inside the frame, and the designated position of the detector indicates that the movable body is in a specific state. Therefore, by adjusting the position of the sensor within the frame, the position indicating that the detector, as a movable body, is in a specific state can be easily adjusted. Moreover, this allows for safe adjustment of the position indicating that the detector, as a movable body, is in a specific state, even if the frame is placed in an explosive atmosphere, for example.

[0079] Furthermore, the position detection sensor detects a predetermined position by contacting the detection body. Therefore, when the sensor is a position detection sensor that detects a predetermined position by contacting the detection body, the position indicating the detection body, as a movable object, is in a specific state can be easily adjusted by adjusting the sensor's installation position within the housing. Moreover, even if the housing is placed in an explosive atmosphere, and the sensor is a position detection sensor that detects a predetermined position by contacting the detection body, the sensor's installation position within the housing can be adjusted without disassembling the housing's outer cover, thereby safely adjusting the position indicating the detection body, as a movable object, is in a specific state.

[0080] Furthermore, the frame also includes a rotating shaft connecting the interior and exterior of the frame, allowing the detection body to move as the rotating shaft rotates. Therefore, when the sensor is a position detection sensor that detects a predetermined position by contacting the detection body, which moves with the rotating shaft, the position indicating the detection body's movable state can be easily adjusted by adjusting the sensor's mounting position within the frame. Moreover, this means that, for example, even if the frame is placed in an explosive atmosphere, and when the sensor is a position detection sensor that detects a predetermined position by contacting the detection body, which moves with the rotating shaft, the sensor's mounting position within the frame can be adjusted without disassembling the frame's outer cover, thereby safely adjusting the position indicating the detection body's movable state.

[0081] In addition, the frame is equipped with explosion-proof measures. Therefore, even if the frame is placed in an explosive atmosphere, the position of the sensor inside the frame can be adjusted without removing the outer cover of the frame. Thus, the specified position of the detection object can be safely adjusted while meeting explosion-proof requirements.

[0082] In addition, the housing also includes a coil for operating the slide valve. Therefore, even if the housing including the coil for operating the slide valve is placed in an explosive atmosphere, and if the sensor is a position detection sensor that detects a predetermined position by abutting against a detection body that can move with the rotation axis, the sensor's position within the housing can be adjusted without disassembling the housing. Thus, the position indicating the detection body, which is a movable body, is in a specific state can be safely adjusted while meeting explosion-proof requirements.

[0083] Furthermore, according to the frame 1 of the above embodiment, the frame includes: a rotating shaft connecting the interior and exterior of the frame; a detection body; a cam mechanism enabling the detection body to move linearly along the rotation of the rotating shaft; a sensor detecting the detection body in a specific state after it has reached a predetermined position through movement; and an adjustment unit, wherein the adjustment unit includes: a base supporting the sensor; a guide rail supporting the base linearly; a drive member formed as a rod-shaped member with at least one end exposed to the exterior of the frame and supported rotatably about an axis in the long side direction; and a conversion mechanism converting the rotational movement of the drive member into linear movement of the base along the guide rail, adjusting the sensor's position within the frame by applying a rotational force to one end, thereby adjusting the predetermined position of the detection body. Therefore, the adjustment unit, using the conversion mechanism, adjusts the sensor's position within the frame from the outside of the frame. This conversion mechanism is a mechanism that, after applying a rotational force to one end of the drive member, converts the rotational movement of the drive member into linear movement of the base along the guide rail. Therefore, the sensor placement position in the frame can be adjusted using a simple structure without the need for special mechanical devices.

[0084] Furthermore, the drive member has threads formed on its outer periphery, and the base has a hole with a corresponding threaded groove on its inner periphery that extends in a straight line. The conversion mechanism converts the rotational motion of the drive member into linear motion of the base along the guide rail through the engagement of the threads and the groove. Therefore, the adjustment unit uses the conversion mechanism to adjust the sensor's position within the frame from the outside. This mechanism converts the rotational motion of the drive member into linear motion of the base along the guide rail by engaging the threads of the drive member with the threaded groove of the base after applying a rotational force to one end of the drive member. Thus, the sensor's position within the frame can be adjusted using this simple structure of threads and grooves without the need for special mechanical devices.

[0085] Furthermore, the frame is equipped with explosion-proof measures. Therefore, the adjustment section utilizes a conversion mechanism to adjust the sensor's position within the frame from the outside. This conversion mechanism converts the rotational motion of the drive member into linear motion along the guide rail's base after applying a rotational force to one end of the drive member. Thus, the sensor's position within the frame can be safely adjusted using a simple structure without the need for special mechanical devices, while still meeting explosion-proof requirements.

[0086] Furthermore, the frame also includes a coil for operating the slide valve. Therefore, the adjustment unit utilizes a conversion mechanism to adjust the sensor's position within the frame, which includes the coil for operating the slide valve, from outside the explosion-proof frame. This conversion mechanism converts the rotational motion of the drive member into linear motion of the platform along the guide rail by engaging the threads of the drive member with the threaded grooves of the platform after applying a rotational force to one end of the drive member. Thus, even in explosive environments, for example, the sensor's position within the frame, including the coil for operating the slide valve, can be safely adjusted using a simple structure without special mechanical devices, while still meeting explosion-proof requirements.

[0087] Symbol Explanation

[0088] 1: Frame, 2: Upper part of the frame, 3: Lower part of the frame, 10: Rotating shaft, 11: Crank, 11a: Crank groove, 12: Detector, 13: Guide plate, 13a: Cam groove, 20: First adjustment part, 21: Second adjustment part, 22: First guide rail, 23: Second guide rail, 24: First base, 25: Second base, 26: First drive component, 26a: First operating part, 27: Second drive component, 27a: Second operating part, 28: First conversion mechanism, 29: Second conversion mechanism, 30: First sensor, 31: Second sensor, 40: Solenoid section, 50: Cover, 100: Solenoid valve, 101: Slide valve, 200: Drive device, 210: Working cylinder, 211: Piston rod, 212A: First piston, 212B: Second piston, 213: Helical spring, 214: Air inlet / outlet, 215: Transmission mechanism, 220: Second air piping, 300: Main valve, 310: Piping, 320: Valve box, 321: Valve body.

Claims

1. A frame, characterized in that... include: The sensor is disposed inside the frame; The detection object is the object detected by the sensor; as well as The adjustment unit adjusts the relative relationship between the sensor and the detection body from outside the frame.

2. The frame according to claim 1, characterized in that, The sensor is a position detection sensor that detects a predetermined position of the detection body. The adjustment unit adjusts the predetermined position of the detection body, which is the relative relationship.

3. The frame according to claim 2, characterized in that, The adjustment unit adjusts the specified position of the detection body by adjusting the setting position of the sensor in the frame.

4. The frame according to claim 3, characterized in that, The detection body is a movable body that can move inside the frame. The specified position of the detection body is the position in which the movable body is in a specific state.

5. The frame according to claim 4, characterized in that, The position detection sensor detects the specified position by abutting against the detection body.

6. The frame according to claim 5, characterized in that, The frame also includes a rotating shaft that connects the interior and exterior of the frame. The detection body can move as the rotating shaft rotates.

7. The frame according to any one of claims 1 to 6, characterized in that, The frame is equipped with explosion-proof measures.

8. The frame according to claim 7, characterized in that, The frame also includes a coil for operating the slide valve.

9. A frame, characterized in that... include: A rotating shaft connects the interior and exterior of the frame. Detection body; The cam mechanism enables the detection body to move in a straight line as the rotating shaft rotates; A sensor detects the detection body in a specific state by the movement of the detected object to a predetermined position. as well as Adjustment Department, among which, The adjustment unit includes: The base supports the sensor; The guide rail supports the pedestal and allows it to move along the straight line. The driving member is formed as a rod-shaped member with at least one end exposed outside the frame and is supported rotatably about an axis along its long side; and The conversion mechanism converts the rotational motion of the driving component into linear motion of the platform along the guide rail. By applying a rotational force to one end, the position of the sensor in the frame is adjusted, thereby adjusting the predetermined position of the detection body.

10. The frame according to claim 9, characterized in that, The driving member has threaded teeth formed on the outer periphery of the rod-shaped member. The base has a hole with a threaded groove corresponding to the threaded tooth formed on its inner circumference, extending along the straight line. The conversion mechanism converts the rotational motion of the driving member into linear motion of the platform along the guide rail by the interlocking action of the thread teeth and the thread groove.

11. The frame according to any one of claims 9 or 10, characterized in that, The frame is equipped with explosion-proof measures.

12. The frame according to claim 11, characterized in that, The frame also includes a coil for operating the slide valve.

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