JPH0419265Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a rotary rotary valve used in a scanner suction branch, which is composed of a casing with a plurality of connection ports and a cylindrical valve body with a plurality of openings. It concerns valves.

[Conventional technology and its issues]

Conventionally, improved rotary valves have been known, such as switching valves that switch between multiple flow paths and hot water switching mixing valves that allow multiple fluids to flow in and mix through multiple flow paths. No. 52-86023 discloses a rotary valve consisting of a casing and a cylindrical valve body rotatably housed within the casing, with four first connection ports arranged at equal intervals in the radial direction of the casing. Individually provided, and
One second connection port is provided in the axial direction, and two first openings are provided on the circumference of the valve body, the distance being equal to the opening interval of the first connection port, and the second connection port is provided in the axial direction. Second
A rotary valve is known in which a second opening communicating with a connection port is provided, and the first and second openings communicate with each other.

However, the rotary valve described in this publication does not have the function of increasing or decreasing the number of paths by opening all or opening them individually. It cannot be applied as

[Means to solve the problem]

Therefore, this invention was devised to solve such problems, and its gist is as follows:
A rotary valve consisting of a casing and a cylindrical valve body rotatably housed within the casing, and at least three first connection ports P1, P2, P6 are opened in the radial direction of the casing. , and one second connection port is opened in the axial direction,
Further, a first opening communicating with the first connection port is provided in a circumferential portion of the cylindrical valve body, and
In a rotary valve having a second opening that communicates with the second connection port in the axial direction, at least three first connection ports P1 and P are provided.
2, P6, the two first connection ports P1,
The remaining first connection port P6 is opened at a central angle that is an integer multiple of 2 or more of the central angle formed by P2, and the position of the first opening is changed between these first connection ports. This rotary valve is used for a suction branch path for a scanner that is opened so as to at least coincide with the opening positions of P1, P2, and P6.

〔Example〕

The configuration of the present invention will be described in detail based on embodiments shown in the accompanying drawings.

FIG. 1 is a partially sectional side view of a first embodiment of the present invention, and FIG. 2 is a sectional view taken along line A--A in FIG.

1 and 2, 1 is a rotary valve, 2 is a pulse motor that operates this rotary valve 1, and this rotary valve 1 is rotatably housed in a cylindrical casing 3 and this casing 3. , and a cylindrical valve body 4.

First, the casing 3 is composed of a bottomed cylindrical body 5 and a lid 6 that covers the cylindrical body 5, and a bearing portion 7 is provided at the bottom of the lid 6 and the cylindrical body 5, respectively. , 8 are provided, and these bearing portions 7, 8 support shaft portions 9, 10 provided on the left and right sides (FIG. 1) of the valve body 4. A flanged outlet connecting pipe 11, which can also be called a second connecting port, is fixed to the outer side of the lid body 6, and this outlet connecting pipe 11 communicates with the pipe-shaped shaft portion 9. There is. Further, the shaft portion 10 is solid and connected to the pulse motor 2 via a flexible coupling 12.

This casing 3 is provided with a large number of suction connecting pipes P1, P2, . These connecting pipes P have the same diameter, and in this embodiment, the number is four as shown in Fig. 2, and their positions are arranged at 45° intervals (this is called the center angle of the opening position of the connecting port). ), some parts are not provided in the middle of the arrangement.

Next, the cylindrical valve body 4 will be described.
This is also formed of a cylindrical body with a bottom, and a lid body 13 is provided to cover it, and the solid shaft portion 10 is protruded from the bottom thereof, and the pipe-shaped shaft portion 9 is protruded from the lid body 13. It is set up. This shaft portion 9 is
It has an opening. Further, there is a small gap between the inner diameter of the casing 3 and the outer diameter of the valve body 4.

This valve body 4 has a number of suction ports Q1, Q2, . . . , which serve as first openings, opened in its cylindrical surface.
These suction ports Q have the same opening area, and in this embodiment, four are provided as shown in FIG. 2, and their positions are also spaced at 45° intervals, with some of them not provided in the middle of the arrangement.

That is, suction connecting pipes P1, P2, P3, P4
The arrangement positions of the suction ports Q1, Q2, Q3, and Q4 are between P1 and P2 and between P3 and P4, which is the so-called center angle, and is spaced at 45° intervals, but between P1 and P4, the center angle is 45 degrees apart.
90°, the center angle between P2 and P3 is 180°,
Similarly, the center angle between Q1 and Q2 and between Q3 and Q4 is
Although the interval is 45°, the center angle between Q2 and Q3 is 90°, and Q
The center angle between 4 and Q1 is 180°.

This embodiment has the above configuration, so to explain its general usage, the suction connection pipe P
1, P2, P3, P4 and suction ports Q3, Q4, Q
1 and Q2, the rotary valve 1 is fully opened. Next, if Q1 is rotated clockwise toward P4 from the fully open state, Q1 and P4 will match and become open as shown in FIG. At the same time, Q3 and P2 match and become open, but
Q2, Q4 and P1, P3 are closed. In other words, the flow rate flowing through the rotary valve 1 can be limited to 1/2 from the fully open state.

Next, if Q1 is further rotated 45 degrees clockwise from the state shown in FIG. 2, Q1, Q3, and Q4 will all be closed, and only Q2 will match P1 and will be open. In other words, the flow rate can be limited to 1/4 from the fully open state.

Furthermore, an example will be described in which the rotary valve 1 of this embodiment is arranged at a branch of a suction pipe communicating with a recording drum of a color scanner.

That is, the recording drum of a color scanner wraps a film around the drum and uses vacuum suction to ensure adhesion. Therefore, a large number of small holes for vacuum suction are made on the entire surface of the drum, and these are connected to a suction source so that the vacuum suction works even while the drum is rotating at a high speed of, say, 10 revolutions/second. It has become a mechanism. Recently, as such recording drums have become larger, it has become possible to use film half the size of the full size for some jobs, and if full size film is used for such jobs, this film is wasted. Therefore, the present applicant has already made the following proposal in Utility Application No. 58-34472. That is, as shown in FIG. 7, the recording drum 20 is divided into four air chambers No. 1, No. 2, No. 3, and No. 4, and each air chamber No. 1 to No. 4 is divided into four air chambers.
4 has proposed a recording drum in which suction pipes are connected to an exhaust fan through respective solenoid valves, but the present invention does not use such multiple solenoid valves, and the present invention eliminates the use of such multiple solenoid valves. The suction pipes 21 to 24 are joined by a rotary valve and communicated with one exhaust fan 25. Then, the rotary valve 1 of this embodiment is arranged at the confluence point of these suction pipes 21 to 24, and P1 is placed in the air chamber No. 1.
, P2 is connected to No. 2, P3 is connected to No. 3, and P4 is connected to No. 4.

Therefore, when using the 1/4 film, the rotary valve 1 is operated to open only the air chamber No. 1. For example, in Figure 2, rotate 45 degrees clockwise from Q1 to
2 to match P1.

When using horizontal 1/2 film, air chamber No. 1 and No. 2,
In other words, P1 and P2 are opened (in Figure 2, Q1 is
90° rotation). When using vertical 1/2 film, open air chambers No. 1 and No. 3, that is, P1 and P3 (the second
Rotate Q1 by 270° in the figure). When using full-size film, air chambers No. 1 to No. 4, that is, P1,
Open P2, P3, and P4 (in Figure 2, Q1 is
315° rotation). Also, when removing the wrapped film, only air chambers No. 3 and No. 4, that is, P3 and P4 are opened, and only air chambers No. 3 and No. 4 are sucked (see Fig. 2). 180° rotation). As a result, the film can be easily removed from the recording drum 20 without falling. In the first embodiment described above, the suction port Q is connected to the Q of the first group.
Set the pitch between 1 and Q2 to 45°, and set the pitch between Q3 and Q of the 2nd group to 45°.
It is clear from the figure that the pitch between the 4th group and the 2nd group was set to 45°, and the pitch between the 1st group and the 2nd group was set to 90° (or 180°). This means that the connecting pipe P and one suction port Q are connected.

Next, a second embodiment will be described using a model diagram in FIG. 3 and a switching explanation list diagram in FIG. 4.

In the first embodiment, the suction ports in the first group and the second group had a central angle of 45°, and the pitch between the groups was 90°, but in the second example, the suction ports in the groups were centered at corner
The pitch is 36°, and the pitch between groups is set at a central angle of 72°.

In Fig. 3, the casing 3 is the outermost cylindrical shape,
The valve body 4 shown as a concentric circle is shown with its diameter changed at stopping positions at every 36° central angle. In this rotary valve 1, when the valve body 4 is rotated clockwise by 36 degrees from the origin where P1 and Q1 match, that is, from the state of 0 degrees, the open/close state of this rotary valve 1 is switched as shown in FIG. It is shown in the state explanation list diagram.
In the figure, hatched areas indicate open areas, and blank areas indicate closed areas.

Therefore, as is clear from Figure 4, the first
Unlike the embodiment described above, a fully closed state (stopping angle of 180° in FIG. 4) is possible in which all the connecting pipes P1, P4 and the suction ports Q1 to Q4 are not connected at all. the result,
If the second embodiment is used for the recording drum,
At 216°, only P1 is open, that is, only air chamber No. 1 is open.
Using 4 films, opening P1 and P2 at 252°, that is, using 1/2 film horizontally in air chambers No. 1 and No. 2,
P3 and P4 open at 108°, that is, air chambers No. 3 and No. 4
Using horizontal 1/2 film, P1 and P3 open at 324°,
In other words, use of vertical 1/2 film in air chambers No. 1 and No. 3,
At 0°, P1, P2, P3, and P4 are fully opened, that is, air chambers No. 1 to No. 4 can be used to adsorb a full size film.

In addition, in the above first and second embodiments, an example was explained in which the casing 3 was provided with four connecting pipes P, and the valve body 4 was provided with four suction ports Q, but the present invention is not limited to this. For example, as shown in the model diagram of the third embodiment in FIG. 5, eight suction connecting pipes P are arranged at equal intervals, and the number of suction ports Q is four, as in FIG. 1. That is, in FIG. 5, the casing 3 is used as an outer ring, and the valve body 4 shown as a concentric circle with the outer ring is shown with its diameter changing at stopping positions every 45 degrees. From the origin where P1 and Q1 match in the rotary valve 1, that is,
When the valve body 4 is rotated clockwise by 45 degrees from the 0 degree position, the open and close states of the rotary valve 1 are shown in the switching state explanatory list diagram of FIG. In the figure, hatched areas indicate open and blank areas indicate closed.

Therefore, as is clear from Figure 6, now,
For example, if P1, P2, P5, and P6 are used and the other P3, P4, P7, and P8 are sealed with plugs, at an angle of 0°, P6 is closed,
At 45°, P1 is closed, at 180°, P2 is closed, at 225°, P5 is closed, and the other three are open. We can provide rotary valves that are closed at one location and open at others.

In addition, as another rotary valve, P1, P
2. If you use P6 and seal the others, at a stop angle of 225°, P1, P2, and P6 will be open and the valve will be fully open, and at 135°, P1, P2, and P6 will be fully closed, and at 0°, 45°,
2 of P1, P2, P2, P6, P1, P6 at 180°
Open at each location, P6, P2, P at 90°, 270°, 315°
It is immediately clear that these are valves that open one by one.

Furthermore, if the rotary valve 1 is operated by the pulse motor 2, the stop position of the valve body 4 can be changed finely, and as a result, the opening area of the suction connection pipe P of the casing 3 and the suction port of the valve body 4 can be changed finely. Since the aperture area of Q can be matched by slightly shifting, the flow rate can be adjusted. In FIG. 1, reference numeral 15 indicates a motor support, and reference numeral 16 indicates a home position switch.

[Effect of idea]

According to the present invention, the rotary valve can be used in a state where the connection port has the maximum number of openings, a state where the connection port has a smaller number of openings, and a state where the connection port has a single opening. Since it is applied to communicating suction branch paths, for example, suction for a full-sized film and suction for a smaller-sized film can be operated by simply rotating the valve body, and a single solenoid valve is used instead of the conventional multiple solenoid valves. Since it can be replaced with a rotary valve, it does not take up much space, and it can be constructed without using other parts by simply specifying the respective opening positions of the first connection port and the first opening, resulting in an extremely simplified rotary valve. It can be done. Therefore, it can be made suitable for being incorporated into a complicated scanner device.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional side view of the first embodiment of the present invention, FIG. 2 is a sectional view taken from A to A in FIG. 1, and FIG.
The figure is a model diagram of the second embodiment, Figure 4 is a list diagram explaining switching states of the second embodiment, Figure 5 is a model diagram of the third embodiment, and Figure 6 is a diagram of the third embodiment. FIG. 7 is a partial sectional view of the recording drum of the color scanner. 1...Rotary valve, 3...Casing, 4
... Valve body, 11 ... Outlet connection pipe, P ... Suction connection pipe, Q ... Suction port.

Claims (1)

[Claims for Utility Model Registration] A rotary valve consisting of a casing and a cylindrical valve body rotatably housed within the casing;
at least three connection ports P1, P2, P6 are opened, and one second connection port is opened in the axial direction,
Further, a first opening communicating with the first connection port is provided in a circumferential portion of the cylindrical valve body, and
In a rotary valve having a second opening that communicates with the second connection port in the axial direction, of the at least three first connection ports P1, P2, and P6, two of the first The remaining first connection port P is located at a central angle that is an integral multiple of 2 or more of the central angle formed by the connection ports P1 and P2.
6, and the rotary valve used in a suction branch path for a scanner, which is opened so that the position of the first opening is at least coincident with the opening position of these first connection ports P1, P2, and P6.