JPS6337580Y2 - - Google Patents

Description

[Detailed description of the invention] The invention provides a rotary handle for manual operation and a drive mechanism that are interlocked and connected to a rotary shaft for valve opening/closing operation so that the handle can be rotated. This invention relates to a valve opening/closing operation structure provided with a clutch mechanism that connects and disconnects the valve.

The valve opening/closing operation structure enables the valve opening/closing operation to be performed using either a manual handle or a drive mechanism, and also allows the connection between the handle and the rotating shaft to be severed by manual operation. This makes it possible to avoid the risk of the handle rotating unnecessarily when the drive mechanism opens and closes the valve.

However, in the conventional structure of the clutch mechanism that disconnects and disconnects the connection between the handle and the rotating shaft, as shown in FIG. Rotating a member 34 with an occlusal projection 34a which is fitted onto the outside so as to be relatively rotatable and which engages and disengages with the occlusal projection 33 connected to the handle 31 so as to rotate integrally with the occlusal projection 33 connected to the handle 31 as the handle 31 slides forward and backward. A spring 35 is provided on the support shaft 32 so as to be integrally rotatable and non-slidably fitted to the outside and elastically bias the handle 31 toward the occlusal side, and has a locking action on the handle 31 to maintain the handle 31 in the disengaged state. The locking piece 36 is provided so that it can be switched between a locking position and a locking release position by swinging around a support shaft 37, but this structure requires a large number of expensive parts. This has the disadvantage of making the structure expensive and complicated.

An object of the present invention is to simplify the clutch mechanism that connects and disconnects the handle and the rotating shaft.

The characteristic configuration of the present invention is that, in configuring a clutch mechanism that connects and disconnects the rotary handle for manual operation and the rotary shaft for valve opening/closing operation, the handle can be slid freely on a rotary support shaft that rotates integrally with the rotary shaft. , and a portion around the outer periphery of an elastic plate-like piece that is fitted onto the outside so as to be relatively rotatable and that engages and disengages from the occlusal protrusion provided on the support shaft by forward and reverse movement along the axial direction of the support shaft; , attached to the handle so as to be integrally rotatable and integrally slidable, the plate-like piece is locked and supported so as to maintain the occlusal state, and the plate-like piece is attached to the handle as the handle slides forward and backward. A locking portion that is elastically deformed in the axial direction of the support shaft and pressed so as to cross over the support shaft is provided on the support shaft so as to lock and press a portion around the inner peripheral edge of the plate-shaped piece.

Next, the effects of the feature configuration of the present invention will be described.

That is, the connection between the handle and the rotating shaft is interrupted by causing the elastic plate-like piece attached to the handle to engage and disengage from the occlusal protrusion provided on the spindle as the handle slides forward and backward; In order to suppress the accidental detachment of the elastic plate-like piece and the occlusal process when operating the handle, and to make it easier to handle,
By effectively utilizing the elastic deformation function of the elastic plate-like piece, the elastic plate-like piece itself is locked at the locking part provided on the rotating support shaft while allowing the handle to cross over when the handle slides in the forward and reverse directions. This allows the clutch mechanism to have a simple structure that does not require a large number of expensive parts.

In particular, according to the present invention, since an elastic plate-like piece that can be elastically deformed over a large range is used, for example, instead of an elastic plate-like piece, an elastic plate that is difficult to elastically deform over a large range is used. Compared to using a disc-shaped member, the elastic plate-shaped body can be locked to the locking part in a state in which the inside of the plate-shaped body protrudes significantly, and the above-mentioned occlusal state can be maintained. In addition, the outer peripheral edge portion of the elastic plate-like piece is attached to the handle, and the inner peripheral edge portion of the elastic plate-like piece is locked and pressed. Since the locking part is provided on the rotating shaft, for example,
Compared to the case where the inner circumferential edge portion of the elastic plate-like piece is attached to the rotation support shaft, and the handle is provided with a locking portion that locks and presses the outer circumferential edge portion of the elastic plate-like piece. , the elastic plate-like piece larger than the locking part can be maintained in a non-rotating state during operation by the drive mechanism,
It is possible to improve safety, which is a great practical advantage.

Next, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 1, a disc-shaped valve body 2 is provided to open and close a flow path in a valve box 1, and a pair of upper and lower valve rods 3a, 3 are provided.
b is rotatably supported on the valve box 1, and a reduction case 4 equipped with a worm reduction mechanism for rotating the upper valve stem 3a is fixed to the valve box 1, and the valve opening/closing operation is performed. The part 5 is attached to the reduction case 4 to constitute a butterfly valve.

As shown in FIG. 2, the valve opening/closing operation section 5 is constructed by making the output shaft 6 of the electric motor M project to both sides of the motor case 7, and connecting one end of the output shaft to a rotating shaft for valve opening/closing operation. 8, which is axially connected to the worm wheel in the worm reduction mechanism so that it can be operated in forward and reverse directions, and the other end of the output shaft 6 is connected to the rotation support of the rotary handle 9 for manual operation. The shaft 10 is further provided with a clutch mechanism C for connecting and disconnecting the handle 9 and the rotating shaft 8, as will be described later.
The valve body 2 is configured to be able to be operated in the forward and reverse directions by either the handle 9 or the handle 9.
By disconnecting the handle 9 from the rotating shaft 8, the handle 9 is configured to avoid unnecessary rotation when the electric motor M is operated.

As shown in FIGS. 8 to 5, the clutch mechanism C is constructed by fitting the handle 9 onto the rotating shaft 10 so as to be slidable and relatively rotatable, and using a fan-shaped elastic plate. The outer peripheral edge portions of each of the two plate-shaped pieces 11 are bolted to the handle 9 so as to be able to rotate and slide integrally, and the plate-shaped pieces 11 are engaged by forward and reverse movement along the axis direction of the spindle. With the two cylindrical occlusal protrusions 12 to be removed being engaged in the recess 14 of the cylindrical body 13 fitted onto the support shaft 10, both occlusal protrusions 12, 12, the cylindrical body 1
3, and a bolt 15 penetrating through the support shaft 10
is fixed to the support shaft 10 so as to be integrally rotatable, and locks and supports the inner peripheral edge portion of the plate-like piece 11 to maintain the above-mentioned occlusal state, and as the handle 9 slides in the forward and reverse directions, the plate-shaped piece 11 Attach the shaped piece 11 to the handle 9
Two protruding locking portions 16 are integrally formed on the cylindrical body 13, and the protruding locking portions 16 are elastically deformed in the direction of the spindle axis and pressed so that the handle 9 crosses over. A stopper 17 for receiving and regulating the movement range of the handle 9 is formed at the end of the cylindrical body 13 that receives the boss of the handle 9, and further includes a stopper 17 for receiving and regulating the movement range of the handle 9.
Stopper 1 that catches and regulates the range of movement to the side
8 is constituted by an outer wall portion of the motor case 7 that receives the boss of the handle 9.

In short, the clutch mechanism C is configured with a simple structure in which the elastic plate-like piece 11 is effectively used not only as a member for dislocating occlusion, but also as a member for maintaining the occlusal state. The elastic plate-like piece 11, which can be elastically deformed, is configured to largely protrude inwardly of the locking part 16 to ensure that the occlusal state can be maintained. It is configured to increase safety by not providing any members that increase the size in the opposite direction.

In carrying out the present invention, one or more elastic plate-like pieces 11 may be provided, and as shown in FIG. They may be formed so that they are connected to each other.

Further, the specific shape of the occlusal projection 12 can be changed in various ways, such as forming it into a square shaft shape. or,
The specific structure of the locking portion 16 can be modified in various ways, such as by arranging a plurality of protrusions in parallel at appropriate intervals in the circumferential direction.

Furthermore, to construct the elastic plate-like piece 11, a synthetic resin material such as polyethylene or polypropylene can be used.

In addition, when the rotating shaft 10 is provided to rotate integrally with the rotating shaft 8, various changes can be made, for example, by making the supporting shafts 10 formed separately from the rotating shaft 8 interlocked with the rotating shaft 8 through gears. .

Further, as the drive mechanism M, various types of mechanisms such as an electric motor, a fluid pressure cylinder, a fluid pressure motor, etc. can be used. If necessary, a clutch mechanism may be provided to connect and disconnect the drive mechanism M and the rotating shaft 8.

In addition to the butterfly valve, the opening/closing operation structure of the present invention can be applied to other rotating type valves such as ball valves, and sliding type valves such as water control doors. It can be applied not only when switching between the usage status of M is performed frequently but also when the switching is not performed frequently.

[Brief explanation of the drawing]

Figure 1 is a notched front view of the butterfly valve, Figure 2 is a notched front view of the valve opening/closing operation structure, Figure 3 is a partially expanded notched front view of the clutch mechanism, and Figure 4 is the same as in Figure 3. 5 is a rear view of the clutch mechanism, FIG. 6 is a rear view of another embodiment, and FIG. 7 is a cutaway front view of the conventional example. 8... Rotating shaft for valve opening/closing operation, 9... Rotating handle for manual operation, 10... Rotating shaft, 11... Elastic plate-like piece,
12... Occlusal projection, 16... Locking part, M... Drive mechanism,
C...Clutch mechanism.

Claims (1)

[Scope of utility model registration request] Manual operation rotary handle 9 and drive mechanism M
is interlocked and connected to a rotary shaft 8 for valve opening/closing operation so that it can be rotated, and is provided with a clutch mechanism C that disconnects and disconnects the connection between the handle 9 and the rotary shaft 8. To configure the clutch mechanism C, the handle 9 is slidably and relatively rotatably fitted onto a rotary support shaft 10 that rotates integrally with the rotary shaft 8, and
A portion around the outer periphery of the elastic plate-like piece 11 that engages and disengages from the occlusal protrusion 12 provided at the occlusal protrusion 12 along the spindle axis direction by forward and reverse movement along the spindle axis direction is attached to the handle 9.
The plate-like piece 11 is attached so as to be integrally rotatable and integrally slidable, and the plate-like piece 11 is locked and supported so as to maintain the occlusal state, and the plate-like piece 11 is supported relative to the handle 9 as the handle 9 slides forward and backward. A locking portion 16 is provided on the support shaft 10 to lock and press a portion around the inner peripheral edge of the plate-shaped piece 11, which is elastically deformed in the direction of the shaft axis and pressed so as to cross over the shaft. An operating structure for opening and closing a valve.