JPS6331724Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a collar changer that has an air chamber and a fluid chamber separated by a notch that communicates with the outside air, and that reliably prevents the fluid in the fluid chamber from flowing into the air chamber. Regarding valves.

In painting operations, it may be necessary to sequentially change the type of coating material, such as changing the color of the paint or overspraying. A color changer device is used to select and connect them. However, in the color changer valve used in conventional color changer equipment, the air chamber into which control air is introduced and the fluid chamber into which the coating material flows are simply separated by a sealing material. Fluids such as these tend to leak into the air chamber, thus contaminating the air chamber and at the same time often causing malfunction due to hardening of the coating material.

The present invention aims to provide a collar changer valve that can solve these problems, and one embodiment thereof will be described below with reference to the drawings.

In the figure, the collar changer valve 1 of the present invention is shown.
The case 3 is provided with an air chamber 4 and a fluid chamber 5 through a notch 6 that communicates with the outside air, and a piston 9 that slides in the air chamber 4 is attached to a needle valve 7 that penetrates the inside thereof. A valve hole 12 communicating with the inlet port 10 can be opened and closed by the needle valve 7.

The case 3 consists of a prismatic front case 17 and a blind cylindrical rear case 19 that is screwed to the rear of the front case 17.The front case 17 has a central portion near the rear thereof starting from the opposing ridges. The notch part 6 is provided in a circular arc shape, and a flange plate 22 is fixed to the front end of the notch part 6 by fitting into the cylindrical part 23 and screwing a nut 24 into the notch part 6 . The front case 17 is provided with through holes 26 and 27 which pass through the notch 6 and into which the needle valve 7 is inserted.
The fluid chamber 5 is formed together with the bulge 31 provided at the tip of the fluid chamber 6 . The through hole 26 is fitted with a nut fitting 29 on the notch 6 side, and a nut fitting 30 is screwed into the through hole 27 to seal the needle valve 7, respectively.
The tip of the needle valve 7 can approach and separate from a valve hole 12 provided in a nut-shaped valve fitting 32 that is screwed into the bulged portion 31. A ring-shaped sealing material 34 surrounding the valve hole 12 is fitted to the tip of the valve fitting 32 with its front end surface slightly protruding.

The rear case 19 is provided with a cylinder chamber 35, and the cylinder chamber 35 is arranged concentrically with the needle valve 7 by screwing the rear case 19 into the front case 17.
The air chamber 4 is formed. In the cylinder chamber 35,
The piston 9, which is prevented from loosening by a cap nut 36, slides back and forth. The piston 9 is biased toward closing the valve hole 12 by a spring 39 inserted into a small hole 37 provided at the rear of the cylinder chamber 35 . The front case 17 also has a guide hole 40 on its side that communicates with the air chamber 4 and introduces control air.
An air port 41 at the tip and an inlet port 10 communicating with the through hole 26 via the guide hole 42 are bored,
The inlet port 10 communicates with the outlet port 11 at the outer end of the valve hole 12 through the valve hole 12 . Note that connectors are attached to the air port 41 and the inlet port 10.

As shown in Figs. 2 to 4, the color change valve 1 of the present invention has a body 14 having a plurality of color change valves, for example, six color change valves.
The main body 14 is made up of blocks 42, 43, and 44, each of which has a rectangular shape in plan view, the same shape as the flange plate 22, in this example.
Each block 42, 43, and 44 is a combination of the blocks 42, 43, and 44.
The front and rear surfaces of the nozzle are provided with recesses 47 into which the nut 24 can be loosely inserted and which come into contact with the sealing material 34, and a vertical hole 49 is drilled in the center of the recesses 47 which communicate with the outlet port 11. Also, on both side surfaces, there are conductive guide holes 50 which pass through the vertical hole 49.
At each end of the guide hole 50, which is the mating surface, a joint 5 is provided.
The joint 51 has a hole 52 for inserting the joint 51.
The through hole 5 has a seal 53 around its periphery that can be tightly inserted into each hole 52 and connects the guide holes 50 to each other.
Blocks 42, 43, and 44 are provided.
Through the joint metal fitting 51, the blocks 42, 43, and 44
The guiding holes 50 communicate with each other by fastening them with bolts 56 that pass through through holes 55 provided above and below the block 44. A projection 57 is provided on one side of the block 44 located at one end, and a discharge port 59 for attaching a connector is formed in the projection 56. The other end of the guiding hole 50 is appropriately closed.

Therefore, the collar changer valve 1 is connected to the inlet port 1.
0 to a fluid delivery device (not shown) such as a paint pumping tank, and an air port 41.
Each is connected to a control valve (not shown) through a connector. The control air introduced into the air chamber 4 by operating the control valve causes the piston 9 to retreat against the spring 39, so that the needle valve 7 opens the valve hole 12 and the coating material introduced from the inlet port 10 is released. outlet port 11,
The discharge port 59 passes through the vertical hole 49 of the main body 14 and the guide hole 50.
It can be discharged from A coating tool 13 such as a spray gun or a caulking gun is connected to the discharge port 59, and a desired coating material or other fluid can be applied by selecting the color changer valve 1 by switching the control valve. It can be discharged from the tool 13. Furthermore, since the air chamber 4 and the fluid chamber 5 are separated by the notch 6, even if the coating material leaks from the fluid chamber 5, the air chamber 4
There is no risk of the control air flowing into the air chamber 4, and the control air in the air chamber 4 can also be reliably prevented from entering the fluid chamber 5. Therefore, there is no hardening of the coating material in the fluid chamber 5, and stable operation over a long period of time is possible. , can be suitably employed in automatic coating equipment such as robots.

The collar changer valve 1 of the present invention has a fluid chamber 5 formed between it and the main body 14 by removing the valve fitting 32, and a valve hole 12 formed in the vertical hole 49 of the main body 14. The needle valve 7 can be modified in various ways, such as by using a spring to force the valve hole 12 to open and closing it using controlled air.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is a perspective view showing its appearance, FIG. 3 is a front view showing its usage condition, and FIG. 4 is a side view thereof. 3... Case, 4... Air chamber, 5... Fluid chamber, 6
...notch part, 7 ... needle valve, 9 ... piston, 1
0...Inlet port, 11...Outlet port, 12...
...valve hole.

Claims (1)

[Scope of utility model registration request] A needle valve is installed in a case in which an air chamber and a fluid chamber are separated by a notch that communicates with the outside air, and a needle valve that penetrates the notch and communicates with the air chamber and the fluid chamber, and in the air chamber, A piston is connected to the rear end of the needle valve and slides to move the needle valve forward and backward by the control air introduced into the air chamber, and an inlet port for introducing fluid into the fluid chamber and an inlet port connected to the inlet port of the needle valve are attached. A collar changer valve with a valve hole that opens and closes by moving forward and backward.