JPH1082472A - Controller with opening/closing display function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To read-in a fully opening condition and fully closing condition correctly, and prevent over-turning toward an opening direction and closing direction by arranging a fully opening positioning member for blocking to raise a valve rod to a fully opening position or more. SOLUTION: A valve rod 2 is rotated in a clockwise direction, and is fastened to a rated fastening torque at the time of fully closing. A correct fully closing position of the valve rod 2 is its position. When the valve rod 2 is rotated in an anti-clockcwise direction by just 180 deg., its position is a correct fully opening position. At this time, a fully opening positioning member 5 is inserted from an upper end opening of a bonnet 16, and is screwed around a female screw 18 on a valve rod inserting hole 17. Screwing is carried out until the member 5 abuts on an annular step part 29 formed between a male screw 24 of the valve rod 2 and a cylindrical part 25. Rock screws 54 are screwed around two penetrating female screws 53 opened on the bonnet 16, and the member 5 is fixed to the bonnet 16. It is thus possible to prevent the valve rod 2 from raising more comparing with the fully opening position of the valve rod 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening / closing display function in which the open / closed state of a passage can be confirmed by observing an open / closed sign provided on an open / close display member from a view window provided on a handlebar. With controller.

[0002]

2. Description of the Related Art Conventionally, as a controller with an open / close display function, a valve stem having one end protruding from a valve body and rotatably held by the valve body, a view port fixed to the protruding portion of the valve stem and a view window. And a circumference supported by the valve body so as to freely rotate about the axis of the valve stem and having a radius equal to the radius of rotation about the valve stem of the viewing window. An opening / closing display member in which the open and close symbols are displayed at a distance from each other is provided, and when the handle wheel is rotated in the forward direction in which the valve is opened in a state where the view window and the open symbol match. Engaging portions are provided on the handle wheel and the opening / closing display member, respectively, and are engaged with each other when the handle wheel is rotated in the opposite direction in which the valve is closed in a state where the sight glass matches the closing symbol. Is the steering wheel car and opening and closing display It is known that the steering wheel and the opening / closing display member are relatively rotatable when the engaging portion of the steering wheel and the engaging portion of the opening / closing display member are not engaged with each other. 62-27418
No. 2).

[0003]

In the above-mentioned conventional controller with an opening / closing display function, both the steering wheel and the opening / closing display member are rotated in a state where one of the open and closed symbols is matched with the view window. Therefore, an open sign is displayed in the view window from a little before the fully open state to the fully open state, and a close sign is displayed in the view window from a little before the fully closed state to the fully closed state. In other words, there is a problem that it is not possible to accurately determine whether the vehicle is in the fully opened state or slightly before, or whether it is in the fully closed state or slightly before it, from observation through the viewing window. In addition, since it is impossible to distinguish between a proper fully opened state and a more opened state and a proper fully closed state and a more closed state, it is called too much turning in the opening direction or too much turning in the closing direction. There were also problems.

When a plurality of such controllers with an open / close display function are used side by side, the open symbols of all the controllers are at predetermined positions (for example, at the position corresponding to the inlet of the flow path).
However, when the upper end of the valve stem and the hole formed in the handle are fitted together, the open symbol displayed on each handle is angled from a predetermined position by several degrees to several tens degrees. There was also a problem that this requirement could not be satisfied due to variations in the range.

An object of the present invention is to provide a controller with an open / close display function that can accurately read a fully open state and a fully closed state and can prevent excessive turning in the opening and closing directions. .

Another object of the present invention is to provide a controller with an open / close display function which can solve the problem of the shift of the open symbol position which occurs when the upper end of the valve stem and the hole formed in the handle are fitted. To provide.

[0007]

A controller with an open / close display function according to the present invention comprises a valve body having an upwardly-inserted valve stem insertion hole, and a valve body which is inserted into the valve stem insertion hole with its upper end protruding. A valve stem screwed to the female thread portion, an annular opening / closing display member provided at an upper end portion of the valve body, and a handle disposed above the opening / closing display member and fixed to an upper end portion of the valve stem, The passage in the valve body is opened and closed by the up and down movement of the valve stem accompanying the turning operation of the handle, and the opening and closing symbols provided on the open / close display member are observed through the view window provided on the handle to thereby control the passage. A controller with an open / close display function capable of confirming the open / close state is characterized in that a full-open positioning member is provided to prevent the valve stem from rising above the full-open position.

According to the controller with the open / close display function of the present invention, the valve stem is prevented from rising above the fully open position (correctly opened position) by the fully open positioning member. The state can be accurately read, and excessive turning in the opening direction can be prevented.

The fully open positioning member is cylindrical and is inserted into the upper part of the valve stem insertion hole so as to be vertically adjustable. The lower end of the fully opened positioning member is located at the middle of the valve stem when the valve stem is in the fully open position. It is preferable to provide an annular step that is in contact. In this way, after the valve stem is brought to the fully open position, the fully open positioning member is inserted simply by inserting the fully open positioning member into the upper portion of the valve stem insertion hole and fixing it to the valve body with a screw or the like. (Assembly) can be performed easily.

[0010] It is preferable that when the handle is rotated so as to further lower the valve stem in the fully closed position (correctly closed position), an overtightening indication sign is displayed in the view window. By doing so, the fully closed position is clear, the fully closed state can be accurately read, and the excessive turning in the closing direction is also prevented.

The handle is composed of a handle body composed of a cylindrical body and a disc-shaped top wall having an inner diameter larger than the outer diameter of the opening / closing display member, and a nameplate attached to the top wall. A relatively large arc-shaped peephole provided on the peripheral edge of the top wall and a relatively small arc-shaped peephole provided on the peripheral edge of the nameplate are overlapped. It is preferably formed by the following. In this way, after the handle body is fixed to the valve stem, the nameplate can be attached so that the center of the viewing window coincides with the open symbol, and the controller in which the open symbol always comes to a predetermined position can be easily formed. Can be manufactured.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 5 show a controller having an open / close display function according to the present invention.
A valve stem (2) inserted into the valve stem insertion hole (17) with its upper end protruding, and an annular opening / closing display member provided at the upper end of the valve body (1). (3) and open / close indication member (3)
And a cap-shaped handle (4) fixed to the upper end of the valve stem (2). Stem insertion hole (17),
The valve stem (2), the open / close display member (3) and the handle (4) all have the same central axis. The handle (4) is provided with a viewing window (10), and by observing the opening and closing symbols (34) and (35) provided on the opening / closing display member (3) through the viewing window (10), the valve is opened. The open / close state of the passages (12) and (13) in the main body (1) can be checked.

The valve body (1) is composed of a valve box (11) located at the lower end of the controller and a cylindrical bonnet (16) connected to the upper part of the valve box (11) by a cap nut (23). Become.

The valve box (11) has a valve chamber (14) having an open upper end, a left-side inlet passage (12), and a right-side outlet passage (13). The inlet passageway (12) communicates with the center of the bottom surface of the valve chamber (14), and the outlet passageway (13) communicates with the peripheral portion of the bottom surface of the valve chamber (14). On the bottom surface of the valve chamber (14), an annular valve seat (6) is arranged so as to surround the opening edge of the inlet passage (12) on the valve chamber (14) side. A disk-shaped diaphragm (7) is arranged in contact with the upper surface of the valve seat (6).

The bonnet (16) has a valve stem insertion hole (17)
The lower end is inserted into the valve chamber (14). The stem insertion hole (17) is provided with a female screw (18) extending from near the upper end to substantially the center, and the female screw (18)
Male thread of valve stem (2) inserted from below the stem insertion hole (17)
(24) is screwed. A diaphragm holder (8) is inserted into the lower end of the valve stem insertion hole (17). A flange (19) is provided in the middle of the outer periphery of the bonnet (16), and a cap nut (23) is placed over the flange (19) so that the external thread (15) of the valve box (11) is provided. ), The valve body (1) is formed. A male thread (20) is provided at the top of the flange (19) on the outer periphery of the bonnet (16),
This is fitted with a nut (9) used to attach the controller to a panel or the like.

The valve stem (2) is connected to the upper end of the male thread portion (24) and has a cylindrical portion (25) smaller in diameter than the male thread portion (24), and a prismatic portion (26) connected to the upper end of the cylindrical portion (25). ) And a small-diameter external thread portion (27) connected to the upper end of the prism portion (26).

The lower portion of the valve stem insertion hole (17) is slightly larger than the diameter of the female screw portion (18) to form an annular step (21). ) Also has a male thread (24)
It is made slightly larger to form an annular step (28). Therefore, when the valve stem (2) is screwed in from below the valve stem insertion hole (17), the valve stem (2) will rise further when the two steps (21) and (28) abut. Has been blocked.

The open / close display member (3) is provided with open and closed symbols (34) and (35) on the upper surface at an interval of 180 ° on the same circumference.
Are displayed, and the annular display plate (3)
The bonnet (16) is composed of a cylindrical body (32) extending below the inner peripheral edge of (1), and the opening symbol (34) and the inlet passage (12) of the valve body (1) corresponding to the upper and lower sides. It is fixed to. Torso
The (32) is provided with a through-thread part (33). As shown in FIG. 4, the open / close indication member (3) has the open and closed symbols (34) and (35) represented by O and C, as well as the background color of the open symbol (34). Red (36), blue (37), which is the background color of the closing sign (35), and red (38), which is on the clockwise side of blue (37) and indicates overtightening, are painted. ing.

The handle (4) has a handle body (41) consisting of a cylindrical body (42) having an inner diameter larger than the outer diameter of the open / close display member (3) and a disc-shaped top wall (43). And a nameplate (44) attached to the top wall (43). At the center of the top wall (43), a square hole (45) into which the prism (26) of the valve stem (2) fits
Is provided. In the center of the nameplate (44), this square hole (4
5) A larger circular hole (46) is provided. An arc-shaped viewing window is provided on the periphery of the top wall (43) and the nameplate (44), respectively.
(47) (48) is provided, and the viewing window (47) of the top wall (43)
Is set to be approximately 160 ° as a central angle, and the viewing window (48) of the nameplate portion (44) is set to approximately 70 ° as a central angle. These viewing windows (47) and (48) are superimposed on each other, so that the viewing angle of the handle (4) is approximately 70 ° at the center angle.
(10) is formed. The handle (4) fits the square hole (45) of the top wall (43) into the prism (26) of the valve stem (2), and the small-diameter male screw (27) on the prism (26). To nut (4
0) is fixed to the valve stem (2) by fitting.

When the handle (4) is rotated 180 ° clockwise as viewed from a plane from the open state of the controller, the valve stem (2)
Since the male thread (24) and the female thread (18) of the valve stem insertion hole (17) are screwed together, the valve stem (2) is lowered, and the lower end of the valve stem (2) is lowered. Is diaphragm holder (8)
The diaphragm (7) is pressed through. As a result, the diaphragm (7) is brought into close contact with the valve seat (6), whereby the space between the inlet passage (12) and the outlet passage (13) is shut off, and the controller is closed. The fully closed position of the controller is determined by an appropriate value of the tightening torque. The fully open position of the controller is a position where the handle (4) is rotated 180 ° counterclockwise from the fully closed position of the controller.

From the fully closed position of the controller, set the handle (4) to 1
When rotated more than 80 ° counterclockwise, the valve stem
The annular step (28) formed in the lower part of (2) is the valve stem insertion hole (1).
7) The valve stem is brought into contact with the step (21) formed at the bottom of
(2) does not rise any further. However, the position of the valve stem (2) at this time varies considerably, so that the fully open position cannot be determined accurately.

In order to accurately determine the fully open position,
Above the valve stem insertion hole (17), a short cylindrical fully open positioning member
(5) is inserted. The fully open positioning member (5) prevents the valve stem (2) from rising above the fully open position of the passage, as will be described later. On the outer periphery of the fully-open positioning member (5), a male thread (51) is provided which is screwed into the female thread (18) of the valve stem insertion hole (17). Further, a flange portion (52) is provided at the upper end of the fully open positioning member (5).

Hereinafter, the structure of the main part of the present invention and the operation and effect thereof will be described according to the assembling order.

Valve stem (2) and diaphragm holder (8)
The bonnet (16) with
(7) is inserted into the valve chamber (14) where the
6) and the valve box (11) are connected with the cap nut (23). Up to this point, the operation is almost the same as the conventional one, but since the positioning of the bonnet (16) and the valve stem (2) is not required at the time of coupling with the cap nut (23), the coupling operation can be facilitated.

Next, the valve stem (2) is rotated clockwise and tightened until it reaches the specified tightening torque when fully closed. The correct fully closed position is when the valve stem (2) is in this position.

Next, the valve stem (2) is rotated exactly 180 ° counterclockwise. This is the correct fully open position.
At this time, the fully open positioning member (5) is inserted through the upper end opening of the bonnet (16), and the female thread (18) of the valve stem insertion hole (17) is inserted.
And screw it down. Screw in the male thread (2) of the stem (2).
The process is performed until it comes into contact with the annular step (29) formed between 4) and the column (25). Then, lock screws (5) are inserted into the two internal threaded portions (53) opened in the bonnet (16).
4) Screw in fully open positioning member (5) and bonnet (16)
Fixed to This prevents the valve stem (2) from rising further than the fully open position.

Next, the open / close display member (3) is attached. When the opening / closing display member (3) is fitted over the upper end of the bonnet (16), the opening / closing display member receiving step (22) on the outer periphery of the bonnet (16) stops and stops.
The opening / closing display member (3) is turned so that the opening and the entrance passage (12) coincide with each other, and the two internal threaded portions (33) opened in the body (32) of the opening / closing display member (3) Each lock screw (39) is screwed in, and the open / close display member (3) is fixed to the bonnet (16).
At this time, the closing symbol (35) comes directly above the outlet passage (13) of the valve body (1).

Next, the square hole (45) of the top wall (43) of the handle body (41) is fitted to the prism (26) of the valve stem (2). Here, the positioning of the opening / closing display member (3) so that the opening symbol (34) and the entrance passage (12) coincide with each other at the time of (1) and (2), the handle body ( The center of the viewing window (47) opened in the top wall (43) of the window (41) does not always coincide with the open symbol (34). So, the top wall (43)
The viewing window (47) is enlarged so that the open symbol (34) can be seen even when the fitting between the valve stem (2) and the handle body (41) changes. For example, when the valve stem (2) rotates clockwise by 45 ° from the state of FIG. 2, the portion (47a) near the counterclockwise end of the viewing window (47) of the top wall (43) is opened. symbol
(34). If the cross section of the prism (26) of the valve stem (2) is square, a margin of ± 45 ° should be provided and the viewing window (43) of the top wall (43) can be set regardless of the position of the valve stem (2). The open symbol (34) can be confirmed from 47).

Next, the nameplate (44) is attached to the top wall (43). The viewing window (48) of the nameplate (44) is sized to match the opening symbol (34), and at the position where the center of the viewing window (48) matches the center of the opening symbol (34), The nameplate (44) is fixed to the top wall (43) with an adhesive. As a result, the oversized portion of the viewing window (47) of the top wall (43) is replaced by the viewing window (48) of the nameplate (44).
Is hidden in the part without. In this way, the position of the open symbol (34) coincides with the position of the inlet passage (12), preventing the valve stem (2) from rising further than the fully open position, and in the fully open position, the handle (4) is closed. Viewing window (10) center and open sign (34)
A controller with an open / close display function, which coincides with the center of, is manufactured.

Finally, the valve stem (2) is rotated clockwise and tightened until it reaches the specified tightening torque when fully closed, and the center of the viewing window (10) of the handle (4) and the closing symbol (35) are closed. To see if it matches the center. If the operations from to are performed correctly, this naturally coincides, and it can be confirmed that the product is normal.

FIG. 1 shows a state in which the valve stem (2) is in the fully opened position. The diaphragm (7) is separated from the valve seat (6), and the fully opened positioning member (5) is connected to the valve stem (2). ) Abuts the annular step (29) at the upper end of the external thread (24). On the other hand, FIG. 3 shows a state in which the valve stem (2) is in the fully closed position, the handle (4) rotates by 180 °, and the diaphragm
(7) is pressed against the valve seat (6) and the fully open positioning member (5)
Is separated from the annular step (29) at the upper end of the male thread (24) of the valve stem (2). The distance between the fully open positioning member (5) and the annular step (29) is about 0.6 to 0.7 mm.

FIG. 5 shows how the open / close symbols (34) and (35) are observed from the viewing window (10). As shown in (a), in the fully open state, with the alphabetic symbol "O",
The background is displayed in red (36). Handle (4)
Is rotated clockwise by about 40 °, a blue (37) ground starts to appear after a red (36) ground as shown in (b). Then, when the handle (4) is rotated 180 ° clockwise from the fully opened state, as shown in (c), all the backgrounds become blue (37) and the alphabetic symbol “C” is seen through the viewing window ( It is displayed in the center of 10), and it can be confirmed that it is fully closed. If the user further rotates clockwise from this state, a red (38) ground begins to appear after a blue (37) ground as shown in (d). This red
(38) is received as an overtightening display sign, and rotation is stopped, so that overtightening is prevented. When the handle (4) is rotated counterclockwise from the fully closed state shown in (c), the state becomes (a) through the state shown in (b). As described above, the handle (4) cannot be rotated counterclockwise.

In the above embodiment, the controller using the diaphragm (7) has been described as an example, but the configuration of the valve element and the valve seat is not limited to this. Further, the controller is not limited to one that opens and closes by rotating the valve stem (2) by 180 °, but may be one that opens and closes by rotating the valve stem (2) by 90 ° or 270 °. The cross section of the prism portion of the valve stem (2) is not limited to a square, but may be a regular hexagon or serration. In the case of a hexagon, a margin of ± 45 ° is required for a square, but ± 30 ° is sufficient, and serration is even less. A male screw portion (51) that is screwed into the female screw portion (18) of the valve stem insertion hole (17) is provided on the outer periphery of the fully open positioning member (5). It may have a cylindrical shape that is loosely fitted into the rod insertion hole (17).

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing a fully opened state of a controller with an open / close display function according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a longitudinal sectional view showing a fully closed state of the controller with an open / close display function.

FIG. 4 is an exploded perspective view of a main part.

FIG. 5 is a plan view sequentially showing a display state observed from a viewing window when a handle is rotated from a fully opened state.

[Explanation of symbols]

 (1) Valve body (2) Valve stem (3) Open / close indication member (4) Handle (5) Fully open positioning member (10) Viewing window (12) Inlet passage (13) Outlet passage (17) Valve stem insertion hole (18 ) Female thread (29) Annular step (34) Open symbol (35) Closed symbol (38) Over-tightening indicator color (41) Body (42) Top wall (43) Main body (44) Nameplate (47) Viewing window (48) Viewing window

Claims (4)

[Claims] 1. A valve body having an upwardly facing valve stem insertion hole (17).
(1), a valve stem (2) inserted with its upper end protruding into the valve stem insertion hole (17) and screwed into its female thread (18), and a valve body.
An annular opening / closing display member (3) provided at the upper end of (1),
A handle (4) arranged above the opening / closing display member (3) and fixed to the upper end of the valve stem (2), so that the valve stem (2) moves up and down as the handle (4) rotates. The passage in the valve body (1)
(12) (13) is opened and closed, and the open and close symbols (34) and (35) provided on the open / close display member (3) are observed through the viewing window (10) provided on the handle (4). By passage (12) (1
In the controller with the open / close display function that can check the open / close state of 3), it is necessary to provide a fully open positioning member (5) that prevents the valve stem (2) from rising above the fully open position. A controller with an open / close display function. 2. A fully open positioning member (5) is cylindrically inserted into an upper portion of a valve stem insertion hole (17) so as to be vertically adjustable,
An annular step (29) is provided in the middle of the valve stem (2), with which the lower end of the fully open positioning member (5) abuts when the valve stem (2) is in the fully open position. Item 2. A controller with an open / close display function according to item 1. 3. When the handle (4) is rotated so as to further lower the valve stem (2) in the fully closed position, an overtightening indication sign (38) is displayed in the view window (10). The controller with an open / close display function according to claim 1 or 2, wherein the controller has an open / close display function. The handle (4) has a cylindrical body (42) having an inner diameter larger than the outer diameter of the open / close display member (3) and a disk-shaped top wall (43). ) And the top wall (43)
And a nameplate (44) attached to the handle (4)
The viewing window (10) has a relatively large arc-shaped viewing window (47) provided on the periphery of the top wall (43) and a relatively small viewing window (47) provided on the periphery of the nameplate (44). Arc-shaped viewing window (47) (4
The controller with an open / close display function according to claim 1, 2 or 3, wherein the controller is formed by superimposing with (8).