JP5912636B2 - Valve control and electric gate and electric valve - Google Patents

Description

The present invention relates to a valve control for driving an external device by a motor, and an electric gate and an electric valve provided with the valve control.

The valve control connected to the external device transmits the power of the motor to the external device through the power transmission means to drive the external device. The valve control is provided with a mechanism for preventing power from being supplied to an external device and a mechanism for restricting power to be supplied to the external device when a predetermined load or more is generated in the power transmission means for some reason. This is to prevent the valve control and external equipment from being damaged due to a load exceeding a predetermined level.

Some of such mechanisms cut off the transmission of the rotational force of the motor to an external device when a load exceeding a certain level occurs, and specific examples thereof are described in Patent Documents 1 and 2.
Patent Documents 1 and 2 disclose that when a torque exceeding a predetermined value is generated in the valve control, the transmission of the rotational force of the motor is interrupted and the motor continues to operate, but the rotational force of the motor is not transmitted to the external device. Is described.
However, the valve control disclosed in Patent Documents 1 and 2 cannot detect abnormality in the valve control from the state of the motor.

On the other hand, Patent Document 3 describes an electric actuator in which a torque calculator is connected to a motor. If this electric actuator is applied to valve control, it is possible to provide a mechanism for stopping the motor when a torque exceeding a predetermined value is generated.
In the field where the valve control is operated remotely, a mechanism that can remotely know the operating state of the motor is adopted as standard, so that the operator can know whether there is an abnormality in the valve control from the operating state of the motor. Is possible.

By the way, in order to enable the operation of an external device connected to the valve control even when the motor is not operated, a handle that can be manually operated may be provided for the valve control.
By providing a handle connected to the power transmission means, the external device can be operated even when the motor is an electric motor and power cannot be supplied to the electric motor or when the motor malfunctions and the motor does not operate. It is effective for emergency response.

Japanese Patent Laid-Open No. 2004-261093 JP 2010-223419 A JP 2009-81935 A

However, it is assumed that the handle is operated by a person, and the operation of the handle is limited to an emergency in the first place. For this reason, there has been no idea of providing a mechanism for stopping or restricting transmission of the force of the handle when a torque exceeding a predetermined value is generated by the handle operation in the valve control.
Therefore, for example, when a torque exceeding a predetermined value is generated by a handle operation such as turning the handle by a plurality of people, it is impossible to stop the transmission of force to the external device.
The present invention has been made in view of such circumstances. A valve control that restricts transmission of force to an external device when a load greater than a predetermined value is generated by a handle operation, and an electric gate and electric motor using the valve control. The purpose is to provide a valve.

Valve control according to the first invention along the object, a motor, a power transmission means for transmitting a driving force to an external device of said motor, in the motor operation, the load of the above Jo Tokoro said power transmitting means is caused In a valve control having a torque limiter that stops the motor when the power is applied and a manual handle that supplies power to the external device via the power transmission means, a movable body that rotates integrally with the manual handle, and the power A torque transmission member connected to the transmission means; and a frictional force generating member that generates a frictional force between the movable body and the torque transmission member. A torque applied to the movable body from the manual handle is transmitted to the movable body. When the frictional force between the body and the torque transmission member is equal to or lower than the frictional force, the torque transmission member, the power transmission means, and the movable body operate integrally, Torque from $ given to movable body is, when exceeding the frictional force between the movable body and the torque transmission member is integral with the said torque transmission member and the power transmission means and the movable body is released In addition, the power transmission means includes a worm and a shaft that is attached to the worm and moves linearly with the worm when a load greater than a predetermined value is generated on the worm, and the torque limiter is coupled to the worm. is, it stop the motor by detecting the linear movement of the shaft.

In the valve control according to the first aspect of the present invention, the frictional force generating member is preferably a spring member that biases the movable body and the torque transmission member.

In the valve control according to the first aspect of the present invention, it is preferable that a nut is provided for adjusting the magnitude of the force by which the spring member biases the movable body and the torque transmission member according to the tightening position.

In the valve control according to the first aspect of the present invention, the manual handle and the movable body can be switched between a connected state and a non-connected state, and the manual handle and the movable body can be operated in the non-connected state, It is preferable that an interlock mechanism for stopping the motor when the manual handle and the movable body are connected is provided.

An electric gate according to a second aspect of the present invention, comprising: an opening / closing mechanism A provided with an elevating body that opens and closes a flow path; a motor; power transmission means for transmitting the driving force of the motor to the opening / closing mechanism A; An electric gate having a torque limiter for stopping the motor when a load exceeding a certain level is generated in the power transmission means during operation of the motor, and a manual handle for supplying power to the opening / closing mechanism A via the power transmission means A movable body that rotates integrally with the manual handle, a torque transmission member coupled to the power transmission means, and a frictional force generating member that generates a frictional force between the movable body and the torque transmission member. And when the torque applied from the manual handle to the movable body is less than the frictional force between the movable body and the torque transmission member, the torque transmission member and the power transmission means and the movable When the torque applied to the movable body from the manual handle exceeds the frictional force between the movable body and the torque transmission member, the torque transmission member and the power transmission means And the unity of the movable body is released.

The motor-operated valve according to a third aspect of the present invention is directed to an opening / closing mechanism B having a rotating body that opens and closes a flow path, a motor, a power transmission means that transmits the driving force of the motor to the opening / closing mechanism B, and A motor-operated valve having a torque limiter for stopping the motor when a load exceeding a certain level is generated in the power transmission means during operation of the motor, and a manual handle for supplying power to the opening / closing mechanism B via the power transmission means A movable body that rotates integrally with the manual handle, a torque transmission member coupled to the power transmission means, and a frictional force generating member that generates a frictional force between the movable body and the torque transmission member. And the torque transmission member, the power transmission means, and the movable body are equal when the torque applied from the manual handle to the movable body is less than the frictional force between the movable body and the torque transmission member. When the torque applied from the manual handle to the movable body exceeds the frictional force between the movable body and the torque transmission member, the torque transmission member, the power transmission means, and the movable Unity with the body is unraveled.

In the valve control according to the first invention, the electric gate according to the second invention, and the electric valve according to the third invention, the torque applied from the manual handle to the movable body is a frictional force between the movable body and the torque transmission member. In the following cases, when the torque transmission member, the power transmission means and the movable body operate integrally, and the torque applied to the movable body from the manual handle exceeds the frictional force between the movable body and the torque transmission member, Since the integrity of the torque transmission member and power transmission means and the movable body is released, the load generated on the movable body, torque transmission member, power transmission means, external equipment, etc. by manual handle operation is limited, and damage or malfunctions Occurrence can be prevented.

In the valve control according to the first aspect of the present invention, when the frictional force generating member is a spring member that biases the movable body and the torque transmission member, the force transmitted from the manual handle to the power transmission means during the manual handle operation is limited. Therefore, it is possible to simply design the mechanism to be performed and to avoid the complexity of the valve control structure.

In the valve control according to the first invention, when a nut is provided that adjusts the magnitude of the force by which the spring member biases the movable body and the torque transmission member according to the tightening position, depending on the environment in which the valve control is used, It is possible to easily adjust the frictional force between the movable body and the torque transmission member.

In the valve control according to the first aspect of the present invention, the connected state and the disconnected state of the manual handle and the movable body can be switched, the motor can be operated with the manual handle and the movable body disconnected, When an interlock mechanism that stops the motor in the connected state is provided, when the manual handle and the movable body are connected, the driving force of the motor is reliably prevented from being applied to the manual handle via the power transmission means. Therefore, it is possible to improve the safety for the person who operates the manual handle.

It is explanatory drawing of the valve control which concerns on one embodiment of this invention. It is a fragmentary sectional view of the valve control. It is the schematic of the electric gate provided with the valve control. It is the schematic of the motor operated valve provided with the valve control.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
As shown in FIGS. 1 and 2, the valve control 10 according to an embodiment of the present invention includes a motor 11, a power transmission unit 12 that transmits a driving force of the motor 11 to an external device, and the motor 11 is in operation. A torque limiter 13 that stops the motor 11 when a load exceeding a certain level is generated in the power transmission unit 12 and a manual handle 14 that supplies power to an external device via the power transmission unit 12 are provided.

As shown in FIG. 1, the power transmission means 12 includes an output shaft 15 connected to an external device. The output shaft 15 is operated by the operation of the motor 11 or by the rotation of the manual handle 14 to supply power to the external device.
External devices that are operated by receiving power from the output shaft 15 include a gate mechanism (an example of an opening / closing mechanism A) 16 shown in FIG. 3 and a butterfly mechanism (an example of an opening / closing mechanism B) 17 shown in FIG. 16 and the butterfly mechanism 17 open and close the flow path by the power transmitted from the output shaft 15.

As shown in FIG. 3, the electric gate 18 can be mainly constituted by the valve control 10 and the gate mechanism 16. The gate mechanism 16 includes an elevating body 19 that is a rectangular plate material fixed to the output shaft 15, and a frame body 20 that supports the elevating body 19. The elevator 19 moves up and down together with the output shaft 15 when the motor 11 or the manual handle 14 is operated, closes the flow path at the lower limit position, and opens the flow path by ascending from the lower limit position.

As shown in FIG. 4, the motor-operated valve 21 can be mainly configured by the valve control 10 and the butterfly mechanism 17. The butterfly mechanism 17 includes a rotating body 22 that is a circular plate member fixed to the output shaft 15 and a frame body 23 in which the rotating body 22 is disposed. The rotating body 22 rotates together with the output shaft 15 when the motor 11 or the manual handle 14 is operated, closes the flow path 23 by closing the inside of the frame body 23 at the 0-degree position, and rotates from the 0-degree position. open. Although the butterfly mechanism 17 shown in FIG. 4 does not include a speed reducer, the butterfly mechanism including the speed reducer can be connected to the valve control 10 to constitute an electric valve. In the present embodiment, the rotating body 22 is a plate material, and the motor-operated valve 21 is a so-called butterfly valve. However, a ball-shaped member can also be used for the rotating body. This is a so-called ball valve.

The electric gate 18 and the electric valve 21 are partially different in design of the valve control 10. This is because the output shaft 15 moves up and down in the motorized gate 18 whereas the output shaft 15 rotates in the motorized valve 21. In this embodiment, the valve control 10 applied to the electric gate 18 will be mainly described, and portions of the electric gate 18 and the electric valve 21 having different design of the valve control 10 will be described as appropriate.

As shown in FIG. 1, the valve control 10 includes an electric motor 11, and a gear 26 is fixed to a rotating shaft 25 of the motor 11. The gear 26 meshes with a gear 27 provided in the power transmission means 12, and the gear 27 is fixed to one end portion of a shaft 29 to which a worm 28 is attached.
A worm wheel 30 meshing with the worm 28 is fixed to a sleeve 31 that includes the output shaft 15 and has an internal thread formed inside. The sleeve 31 is rotatably attached to the bearing housing 32, and when the worm 28 rotates with the shaft 29, the sleeve 31 rotates about the output shaft 15.

In the present embodiment, the output shaft 15 is a male screw material and meshes with a female screw inside the sleeve 31. As shown in FIG. 3, the lower end portion of the output shaft 15 is fixed to the elevating body 19, and the gate mechanism 16 is designed so that the elevating body 19 cannot perform operations other than elevating, for example, rotating operation.
Therefore, the rotational force generated when the motor 11 is actuated to rotate the rotary shaft 25 is transmitted to the sleeve 31 via the gears 26, 27, the shaft 29, the worm 28 and the worm wheel 30 to rotate the sleeve 31. When the sleeve 31 rotates, the output shaft 15 meshed with the female screw of the sleeve 31 moves up and down together with the lifting body 19.

The motor 11 can switch the rotation direction of the rotary shaft 25, and the lift direction of the lift body 19 is determined by the rotation direction of the rotary shaft 25.
In the present embodiment, the power transmission means 12 is mainly constituted by the output shaft 15, gears 26 and 27, worm 28, shaft 29, worm wheel 30, sleeve 31, and bearing housing 32.

In the case of the motor-operated valve 21, the sleeve 31 and the output shaft 15 are key-connected. When the sleeve 31 is rotated by the operation of the motor 11, the output shaft 15 rotates together with the sleeve 31 to rotate the rotating body 22 fixed to the output shaft 15.
In the motor operated valve 21, the output shaft 15 does not move up and down.

Here, when an object is present below the lifting body 19 at the raised position, or when an object is sandwiched between the lifting body 19 and the frame body 20, the lifting operation of the lifting body 19 is hindered. If the operation of the motor 11 is continued in a state where the lifting operation of the lifting body 19 is hindered, the motor 11, the gears 26 and 27, the lifting body 19 or the like may be damaged or malfunctioned.

Therefore, when the motor 11 is in operation, a torque limiter 13 for stopping the operation of the motor 11 is provided in the valve control 10 when a load exceeding a predetermined value is generated in the power transmission means 12, and the devices and members provided in the electric gate 18 are damaged. And preventing problems.
In the present embodiment, the torque limiter 13 determines whether or not a predetermined load or more is generated in the power transmission unit 12 based on the position of the shaft 29.

As shown in FIGS. 1 and 2, the power transmission means 12 is provided with a housing member 33 fixed to the other end portion of the shaft 29 by a support member (not shown). A spring member 34 is disposed in the housing member 33, and the spring member 34 biases the shaft 29 in the axial direction of the shaft 29 (in the present embodiment, the direction in which the motor 11 is present).
When the motor 11 is in operation, the worm wheel 30 can be rotated together with the sleeve 31 in a state where the lifting / lowering operation of the lifting / lowering body 19 is hindered, compared to a state where the lifting / lowering operation of the lifting / lowering body 19 is not hindered. Necessary. When a load exceeding a predetermined value is generated in the worm 28 engaged with the worm wheel 30, the shaft 29 opposes the urging force of the spring material 34 and is opposite to the direction of the urging force of the spring material 34 (that is, the motor 11. Move away).

As shown in FIG. 1, the torque limiter 13 is connected to a worm 28 and designed to detect the movement of the shaft 29. The torque limiter 13 detects the movement of the shaft 29 to detect that a load exceeding a predetermined value is generated in the power transmission means 12 and stops the motor 11 in operation.
The motor 11 is connected to a remote operation terminal (not shown), and since the operation terminal can detect the state of the motor 11, when the motor 11 that has been operating is stopped, the operation terminal detects that the motor 11 has been stopped. To do. Therefore, the operator who has operated the operation terminal can know through the operation terminal that the motor 11 has stopped, and can know that an abnormality has occurred in the electric gate 18.

The valve control 10 is provided with a position detector 35 that detects the position of the elevating body 19 in the vicinity of the torque limiter 13.
The position detector 35 calculates the position of the elevating body 19 from the number of rotations of the shaft 29, detects that the elevating body 19 has reached a predetermined upper limit position or lower limit position while the motor 11 is operating, and detects the motor 11. To stop.
The torque limiter 13, the position detector 35, and the like are disposed in the casing 36 shown in FIG.

As shown in FIG. 2, the circular manual handle 14 is fixed to the housing member 33, and a slide block 38 is attached so as to cover a part of the housing member 33. The slide block 38 can advance and retreat within a predetermined range along the axial direction of the shaft 29 and is urged in a direction away from the motor 11 by a spring 39 disposed in contact with the housing member 33 and the slide block 38. ing.
Further, the slide block 38 can rotate around the shaft 29.

A handle disk 41 on which a handle catch 40 attached to the housing member 33 is hooked is fixed to the slide block 38. The slide block 38 is fixed at a position close to the motor 11 against the urging force of the spring 39 in a state where the handle catch 40 is engaged with the handle disc 41, and the handle disc 41 is engaged with the slide block 38. When it is solved, it moves to a position away from the motor 11.

A boss 42 is fixed to the end (other end) of the shaft 29 opposite to the end (one end) to which the gear 27 is attached, and the boss 42 is movable connected to the manual handle 14. A body 43 is attached. In the present embodiment, the boss 42 is key-connected to the shaft 29.
The slide block 38 has a clutch portion 44, and the movable body 43 is a clutch member designed to mesh with the clutch portion 44. In the present embodiment, a gear-type clutch is employed for the clutch portion 44 and the movable body 43 of the slide block 38.
Since the slide block 38 is disposed at a position away from the motor 11, the clutch portion 44 is engaged with the movable body 43 and connected to the movable body 43, and the movable body 43 is connected to the manual handle 14 via the slide block 38. Connect to The movable body 43 rotates integrally with the manual handle 14 by being connected to the manual handle 14.

Then, in a state where the handle catch 40 is hooked on the handle disk 41 and the slide block 38 is disposed at a position close to the motor 11, the slide block 38 is separated from the movable body 43, and the movable body 43 and the manual handle are separated. 14 is brought into a disconnected state.
Therefore, the manual handle 14 and the movable body 43 can be switched between a connected state and a non-connected state depending on the position of the slide block 38.

A perforated plate 45, 46, 47 that rotates together with the shaft 29 together with the boss 42 is attached to the boss 42, and a disc spring 48 attached to the boss 42 is disposed between the perforated plates 45, 46. Has been.
The movable body 43 is provided between the perforated plates 46 and 47, one side of the movable body 43 is in close contact with the lining 50 in contact with the perforated plate 47, and the other side of the movable body 43 is in contact with the perforated plate 46. It is in close contact with the lining 49.

In the present embodiment, the boss 42 and the perforated plates 46 and 47 constitute a torque transmission member 52 that obtains torque from the movable body 43 and applies torque to the shaft 29.
The disc spring 48 is an example of a spring member that is a frictional force generating member, and generates a frictional force between the movable body 43 and the torque transmission member 52.

The boss 42 is designed such that one side (side closer to the motor 11) is wider than the other part and the perforated plate 47 does not come off the boss 42. The boss 42 is formed with a female screw on the other side (the side far from the motor 11), and a nut 51 is attached to the female screw.
The magnitude of each force by which the disc spring 48 urges the perforated plates 45, 46, 47 and the movable body 43 is adjusted by the tightening position of the nut 51.

In the boss 42, the mounting portions of the perforated plates 45, 46, 47 are oblong when viewed in the axial direction of the shaft 29. Has been. The perforated plates 45, 46, 47 are attached to the boss 42 with the outer peripheral portions of the respective through holes being in close contact with the boss 42, and are fixed to the boss 42 in the rotational direction of the shaft 29 (with the boss 42 Rotate together). Further, the perforated plates 45, 46, 47 are fixed to the boss 42 in the axial direction of the shaft 29 by the widened portion on one side of the boss 42 and the urging force of the nut 51 and the disc spring 48. (The fixed position of the boss 42 in the axial direction is determined). The movable body 43 is designed to be rotatable with respect to the boss 42.

The disc spring 48 generates frictional force between the movable body 43 and the perforated plate 46 and between the movable body 43 and the perforated plate 47 by biasing the perforated plates 45, 46, 47 and the movable body 43. Let Specifically, between the movable body 43 and the perforated plate 46 is between the perforated plate 46 and the lining 49, between the lining 49 and the movable body 43, and between the movable body 43 and the perforated plate 47. And between the movable body 43 and the lining 50 and between the lining 50 and the perforated plate 47.
The linings 49 and 50 can be formed of a semi-metallic material, a carbon metallic material, a metallic material, or the like. In this embodiment, the linings 49 and 50 are formed of non-asbestos mixed with metal powder, aramid fiber, resin, or the like.
The linings 49 and 50 adjust the magnitude of the frictional force between the movable body 43 and the perforated plate 46 and the magnitude of the frictional force between the movable body 43 and the perforated plate 47, respectively. It is provided to adjust the torque transmitted to the perforated plate 46 and the torque transmitted from the movable body 43 to the perforated plate 47, respectively.

When the manual handle 14 rotates with the slide block 38 and the movable body 43 connected, torque is applied from the manual handle 14 to the movable body 43 via the slide block 38, and the movable body 43 rotates together with the manual handle 14.
While the movable body 43 is rotating, a frictional force is generated between the movable body 43 and the perforated plate 46 and between the movable body 43 and the perforated plate 47 in the rotational direction of the movable body 43.
The torque (rotational force) applied from the manual handle 14 to the movable body 43 is less than the frictional force between the movable body 43 and the perforated plate 46 and the frictional force (static frictional force) between the movable body 43 and the perforated plate 47. At this time, the movable body 43, the perforated plates 46 and 47, the boss 42, and the shaft 29 rotate as a unit (that is, the manual handle 14 and the power transmission means 12 operate as a unit).

While the manual handle 14 and the power transmission means 12 are operating together, a state in which the lifting and lowering body 19 is prevented from moving up and down, for example, a state in which the lifting and lowering body 19 in contact with an obstacle occurs, When the force applied to the handle 14 is increased, the torque applied to the movable body 43 from the manual handle 14 also increases.
The magnitude of torque applied from the manual handle 14 to the movable body 43 is less than the frictional force (static frictional force) generated between the movable body 43 and the perforated plate 46 and between the movable body 43 and the perforated plate 47. At this time, the movable body 43 and the perforated plates 46 and 47, the boss 42 and the shaft 29 rotate as a unit, or are brought into a state of being united and stationary.

On the other hand, the magnitude of torque applied from the manual handle 14 to the movable body 43 is a frictional force (static frictional force) generated between the movable body 43 and the perforated plate 46 and between the movable body 43 and the perforated plate 47. When exceeding the above, the integrity of the perforated plates 46 and 47, the boss 42 and the shaft 29 and the movable body 43 is released. In this state, the movable body 43 operates independently from the perforated plates 46 and 47, the boss 42 and the shaft 29, the manual handle 14, the slide block 38 and the movable body 43 rotate, and the boss 42 and the perforated plate 45. , 46, 47 and the components of the power transmission means 12 including the shaft 29 are stationary.

At this time, the torque applied from the movable body 43 to the perforated plates 46 and 47 is a friction force (dynamic friction force) generated between the movable body 43 and the perforated plate 46 and between the movable body 43 and the perforated plate 47. Limited to
Therefore, the load generated in the power transmission means 12 and the gate mechanism 16 is limited, and it is possible to prevent the power transmission means 12 and the lifting body 19 from being damaged.

In this way, the boss 42, the perforated plates 46, 47 and the disc spring 48 adjust the transmission of force from the manual handle 14 to the shaft 29.
Specifically, when the torque applied from the manual handle 14 to the movable body 43 is equal to or less than a predetermined magnitude, the torque applied from the manual handle 14 to the movable body 43 is transmitted to the power transmission means 12 without being limited. The manual handle 14 and the movable body 43, the boss 42, the perforated plates 46 and 47, and the power transmission means 12 operate integrally.
When the torque applied from the manual handle 14 to the movable body 43 exceeds a predetermined magnitude, the torque applied from the movable body 43 to the power transmission means 12 is limited, and the manual handle 14, the movable body 43, and the boss 42 are limited. The perforated plates 46 and 47 and the power transmission means 12 are operable independently of each other.

Further, as shown in FIGS. 1 and 2, an interlock mechanism 53 that stops the motor 11 is attached to the housing member 33. The interlock mechanism 53 includes a bracket 54 attached to the slide block 38 via the handle catch 40, and the bracket 54 moves forward and backward together with the slide block 38.
When the manual handle 14 and the movable body 43 are disconnected from each other, and the bracket 54 is disposed at a position close to the motor 11 together with the slide block 38, the interlock mechanism 53 makes the motor 11 operable.
Therefore, when the manual handle 14 and the movable body 43 are in a disconnected state, the motor 11 can operate to apply a rotational force to the power transmission means 12.

On the other hand, when the handle disk 41 is released from the latch state by the handle catch 40 and the bracket 54 is disposed away from the motor 11 together with the slide block 38, the interlock mechanism 53 puts the motor 11 in a stopped state. To do.
For this reason, when the manual handle 14 and the movable body 43 are connected, the motor 11 is stopped, and when the manual handle 14 is rotated, the driving force of the motor 11 is driven by the power transmission means 12 and the torque transmission member. It is prevented from being transmitted to the manual handle 14 via 52.
With this mechanism, it is possible to reliably prevent the driving force of the motor 11 from being applied to the manual handle 14 while the operator is operating the manual handle 14, which is effective from the viewpoint of safety.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and all changes in conditions and the like that do not depart from the gist are within the scope of the present invention.
For example, the spring member that biases the movable body and the torque transmission member is not limited to a disc spring, and may be a coil spring.

10: Valve control, 11: Motor, 12: Power transmission means, 13: Torque limiter, 14: Manual handle, 15: Output shaft, 16: Gate mechanism, 17: Butterfly mechanism, 18: Electric gate, 19: Lifting body, 20: Frame, 21: Motorized valve, 22: Rotating body, 23: Frame, 25: Rotating shaft, 26, 27: Gear, 28: Worm, 29: Shaft, 30: Worm wheel, 31: Sleeve, 32: Bearing housing, 33: housing material, 34: spring material, 35: position detector, 36: casing, 38: slide block, 39: spring, 40: handle catch, 41: handle disc, 42: boss, 43: movable body , 44: clutch part, 45-47: perforated plate, 48: disc spring, 49, 50: lining, 51: nut, 52: torque MEMBER, 53: interlocking mechanism, 54: bracket

Claims (6)

A motor, a power transmission means for transmitting the driving force of the motor to an external device, and a torque limiter that stops the motor when the motor is in operation, a constant or more loads Tokoro occurs in the power transmission unit, the power In a valve control having a manual handle for powering the external device via a transmission means,
A movable body that rotates integrally with the manual handle, a torque transmission member connected to the power transmission means, and a frictional force generation member that generates a frictional force between the movable body and the torque transmission member, When the torque applied from the manual handle to the movable body is less than the frictional force between the movable body and the torque transmission member, the torque transmission member, the power transmission means, and the movable body are integrated. When the torque applied to the movable body from the manual handle exceeds the frictional force between the movable body and the torque transmission member, the torque transmission member, the power transmission means, and the movable body Unity is unleashed ,
In addition, the power transmission means includes a worm and a shaft that is attached to the worm and moves linearly with the worm when a load greater than a predetermined value is generated on the worm, and the torque limiter is coupled to the worm. , valve control, characterized that you stop the motor by detecting the linear movement of the shaft. The valve control according to claim 1, wherein the frictional force generating member is a spring member that biases the movable body and the torque transmission member. 3. The valve control according to claim 2, further comprising a nut for adjusting a magnitude of a force by which the spring member biases the movable body and the torque transmission member according to a tightening position. The valve control according to any one of claims 1 to 3, wherein the manual handle and the movable body can be switched between a connected state and a non-connected state, and the manual handle and the movable body are in a non-connected state. A valve control characterized in that an interlock mechanism is provided that enables the motor to operate and stops the motor when the manual handle and the movable body are connected. An opening / closing mechanism A having a lifting body for opening and closing the flow path, a motor, power transmission means for transmitting the driving force of the motor to the opening / closing mechanism A, and a load exceeding a certain level on the power transmission means during operation of the motor In an electric gate having a torque limiter that stops the motor when the occurrence occurs, and a manual handle that supplies power to the opening / closing mechanism A via the power transmission means,
A movable body that rotates integrally with the manual handle, a torque transmission member connected to the power transmission means, and a frictional force generation member that generates a frictional force between the movable body and the torque transmission member, When the torque applied from the manual handle to the movable body is less than the frictional force between the movable body and the torque transmission member, the torque transmission member, the power transmission means, and the movable body are integrated. When the torque applied to the movable body from the manual handle exceeds the frictional force between the movable body and the torque transmission member, the torque transmission member, the power transmission means, and the movable body The electric gate is characterized by its unification. Opening / closing mechanism B having a rotating body that opens and closes the flow path, a motor, power transmission means for transmitting the driving force of the motor to the opening / closing mechanism B, and a load of a certain level or more on the power transmission means during operation of the motor In a motor-operated valve having a torque limiter that stops the motor when the engine is generated, and a manual handle that supplies power to the opening / closing mechanism B via the power transmission means,
A movable body that rotates integrally with the manual handle, a torque transmission member connected to the power transmission means, and a frictional force generation member that generates a frictional force between the movable body and the torque transmission member, When the torque applied from the manual handle to the movable body is less than the frictional force between the movable body and the torque transmission member, the torque transmission member, the power transmission means, and the movable body are integrated. When the torque applied to the movable body from the manual handle exceeds the frictional force between the movable body and the torque transmission member, the torque transmission member, the power transmission means, and the movable body A motor-operated valve characterized in that the unity is solved.

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