JP3054410B1 - Drain device - Google Patents

Abstract

An object of the present invention is to provide a drain device that prevents the drain from leaking to the outside when the drain is discharged, thereby preventing the floor and the hands of workers from being stained. SOLUTION: A piston 6 is pushed upward by a spring 7, and in this state, an outer peripheral wall portion 6b of the piston 6 and an inner peripheral wall surface 10a of the slit tube 10 come into liquid-tight contact, whereby the drain 5 It does not discharge. At this time, the connection claw 6c at the lower end of the piston 6 and the connection claw 11a at the upper end of the drain cock 11 are engaged or nearly engaged, and in the case of manual operation, the drain cock 11 is turned. The connecting claws 6c and 11a are engaged, and the piston 6 is lowered together with the drain cock 11 to discharge the drain in the directions of arrows B and C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain device, and more particularly, to a drain in a pipe (a liquid that needs to be drained).
With regard to the drain device for discharging the drain, when the drain device is operated to discharge the drain, the drain leaks and contaminates the floor surface, or when the drain device is manually opened to discharge the drain, the drain is discharged. The present invention relates to a drain device that prevents leakage and soiling of an operator's hand.

[0002]

2. Description of the Related Art FIG. 3 is a cross-sectional view for explaining an example of a conventional drain device (valve). As is well known, the upper end of the drain device has a portion where a drain of a pipe (not shown) accumulates. When the drain 5 accumulates in the housing 1 of the drain device, the float 2 rises by the drain 5, and the valve 3 rises accordingly, and the orifice 4 a of the chamber 4 opens. When the chamber orifice 4a is opened, compressed air in the pipeline is introduced into the chamber 4 through the orifice 4a as shown by an arrow A (in the chamber 4, the piston 6 sliding in the chamber 4 and the piston 6). The piston 6 and the packing 8 provided on the sliding surface of the chamber 4 are liquid-tight (the pores 6a are formed later), and the piston 6 is moved from the position shown by the dotted line at the upper end in the figure. Push down against the spring 7 to the position shown by the solid line.

When the valve 3 (orifice 4a) is open, the compressed air in the chamber 4 is discharged through a small hole 6a provided below the piston 6, so that the piston 6 is moved upward by a spring 7. Lifted to
It is held at the position shown by the dotted line in the figure. When the piston 6 is lifted upward (when it is at the position indicated by the dotted line in the figure), the outer peripheral wall portion 6a including the O-ring 9 of the piston 6
And the inner peripheral wall surface 10a of the slit tube 10 is in liquid-tight contact, so that the drain 5 is not discharged. Note that the slit tube 10 has an upper inner diameter of 10 mm.
a, the inner diameter of the lower part is large, and when the outer peripheral wall part 6a of the piston 6 is opposed to the small diameter part 10a, the small diameter wall part 10a of the slit tube 10 is formed.
When the piston 6 is depressed, a gap is formed between the outer peripheral wall 6b of the piston 6 and the large-diameter inner portion of the slit tube 10 so as to oppose the inner diameter of the slit tube 10. .

However, as described above, when the drain 5 accumulates in the housing 1 and the float 2 rises, the orifice 4a of the chamber 4 is opened, the piston 6 is pushed down, and the outer peripheral wall surface 6b of the piston 6 and the slit tube 1 are opened.
0, the liquid-tight state with the inner peripheral wall surface 10a is released, and a state shown by a solid line in the figure is obtained, and a gap is generated between the outer peripheral wall of the piston 6 and the inner peripheral wall of the slit pipe 10, and the drain 5 It is pushed by the pressurized air inside, and flows out through the lateral hole 4b of the chamber 4 and the gap as shown by an arrow B in the figure. The drain flowing through the gap is partially
As shown by an arrow C, the other part flows out of the drain device through a threaded portion between the drain cock 11 and the lock nut 12, as shown by an arrow D.

[0005] Although the case where the drain is automatically discharged has been described above, when the drain is manually discharged,
When the drain cock 11 is rotated (at this time, the piston 6
Is lifted upward, so that the connection claw 6c at the lower end of the piston 6 and the connection claw 11a at the upper end of the drain cock 11 are engaged), and the drain cock 11 moves downward and is dragged by it. The piston 6 also moves downward, whereby the outer wall 6b of the piston 6 and the small-diameter inner wall 10a of the slit tube 10 are separated from each other, as described above. The drain 5 flows out through a gap formed between the outer peripheral wall 6b of the piston 6 and the large-diameter inner peripheral wall of the slit 10.

[0006]

As described above, the conventional drain device can discharge the drain accumulated in the drain device by either automatic operation or manual operation. In any case, as described above, in any case, as shown by an arrow D, the drain leaks to the outside, and the floor is contaminated with the leaked drain. There was a problem such as soiling and was unsanitary.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and a drain device which prevents the drain from leaking to the outside at the time of drain discharge, thereby preventing the floor and the hands of workers from being stained. The purpose of this is to provide.

[0008]

According to a first aspect of the present invention, there is provided a housing in which a drain accumulates, a slit tube provided through the housing at the bottom of the housing, and slidably disposed in the slit tube. And a piston whose upper end is provided to extend above the slit tube, and is disposed between the lower surface of the upper end of the piston and the upper end surface of the slit tube, and presses the piston upward. A spring,
A drain cock slidably provided in the slit tube and provided below the piston.The piston is moved downward against the spring by moving the drain cock downward. The outer peripheral wall of the piston and the inner peripheral wall of the slit tube are in liquid-tight contact with each other, and when the piston is moved downward, the liquid-tight state is released, and drainage is performed through a gap between the released parts. Wherein the inner wall surface of the slit tube and the outer wall surface of the drain cock are in liquid-tight contact with each other, and the inner wall surface of the slit tube and the outer wall surface of the drain cock are It is characterized in that the drain does not leak outside through the space.

According to a second aspect of the present invention, in the first aspect of the present invention, an O-ring is provided on a surface of the outer surface of the drain cock which is in contact with the inner surface of the slit tube, and the O-ring is provided in the entire movement range of the drain cock. And a liquid-tight state is maintained between the inner wall of the slit and the inner wall of the slit.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the slit tube and the drain cock are connected by a lock nut screwed with a screw provided on the outer peripheral wall. By rotating the drain cock with respect to the lock nut, the drain cock is moved downward, and the piston is moved downward.

According to a fourth aspect of the present invention, in any one of the first to third aspects, a float is provided in the housing,
A valve that is opened and closed by the float, wherein when the drain collects in the housing, the float rises to open the valve, and the air pressure supplied through the valve pushes the piston downward to lower the slit. The liquid-tight state between the inner peripheral wall surface of the pipe and the outer peripheral wall surface of the piston is released.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, a chamber having an orifice which is opened and closed by the valve is provided above the piston, and when the valve is opened, the chamber and the upper end of the piston are opened. Compressed air is introduced through the orifice into the space formed by the compressed air, and the piston moves downward by the compressed air.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects of the present invention, the slit tube has a small-diameter inner wall surface above and a large-diameter inner wall surface below the small-diameter inner wall surface. The outer peripheral wall surface of the piston is always in liquid-tight contact with the small-diameter inner wall surface, and when moved downward, the outer peripheral wall surface of the piston faces the large-diameter inner wall surface of the slit tube, The drain is discharged through a gap formed between an outer peripheral wall surface of the piston and a large-diameter inner surface of the slit tube.

[0014]

1 and 2 are sectional views for explaining an embodiment of a drain device according to the present invention.
FIG. 2 is a diagram showing a state when drain is not accumulated (a state when drain discharge is not activated), and FIG. 2 is a view showing a state when drain is being discharged (state during drain discharge operation). In the figure, parts having the same functions as those of the prior art shown in FIG. 3 are denoted by the same reference numerals as in FIG. When the drain operation is not performed, as shown in FIG. 1, the piston 6 is pushed upward by the spring 7 (to a position shown by a dotted line in FIG. 3).
And the inner peripheral wall surface 10a of the slit tube 10 are in liquid-tight contact, thereby preventing drainage. At this time, the connection claw 6c at the lower end of the piston 6 and the connection claw 11a at the upper end of the drain cock 11 are engaged or almost in the engaged state. In the case of manual operation, the drain cock 11 is turned. As a result, the connecting claws 6c and 11a are engaged, and the piston 6 is lowered together with the drain cock 11 to discharge the drain.

FIG. 2 is a view showing a state when the drain operation is performed. FIG. 2 shows a state when the piston 6 is pushed down by the automatic operation. As described in the prior art shown in FIG. 3, when the float 2 is raised by the drain 5 and compressed air is introduced into the chamber 4, the piston 6 is pushed down by the compressed air, The liquid-tight contact (see FIG. 1) between the outer peripheral wall 6b of FIG. 6 and the inner peripheral wall 10a of the slit tube 10 is released, and the drain flows from the arrow B direction to the C direction through this gap. The above operation is the same as that of the prior art shown in FIG.

In the prior art shown in FIG. 3, the drain passing through the lateral hole 4b of the chamber 4 is not limited to the direction indicated by the arrow C, and the inner wall surface of the slit tube 10 and the outer wall surface of the drain cock 11 Gap between the lock nut 12
Also flows in the direction D through the gap between the threaded portion and the drain cock 11, and the drain flowing in the direction D serves as a drain for external leakage, and this drain soils the floor surface or the hand of the operator during manual operation. It was causing soiling.

The present invention is intended to prevent the drainage from flowing out in the direction D as described above, thereby eliminating the contamination of the floor surface and the operator's hands due to the leakage of the drainage. As shown in the figure, between the inner peripheral surface of the slit tube 10 and the outer peripheral surface of the drain cock 11 (preferably, the drain cock 11 slides in the slit tube 10 during manual operation, so the outer peripheral wall surface of the drain cock (On the side), an O-ring 13 is provided to form a liquid-tight state, thereby preventing the drain from flowing in the direction D shown in FIG.

In the above, an example has been described in which the present invention is applied to a drain device that can be operated either automatically or manually. However, the present invention can also be operated only by manual operation. , In that case, float 2,
The valve 3, the chamber 4, and the pores 6 a of the piston 6 are unnecessary (the upper end surface of the piston 6 is formed flat as shown by a broken line in the figure so that the drain does not leak to the upper surface of the piston 6). In this way, the drain can be discharged only manually without using the air pressure of the pipeline.

[0019]

As is apparent from the above description, according to the present invention, the drain collected in the drain device can be discharged without leaking to the outside, and the drain portion at the lower portion where the drain device is disposed is provided. It is possible to provide a drain device that can be used very hygienically without soiling the floor or soiling the hands of the operator during manual operation.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a cross-sectional configuration of a drain device according to an embodiment of the present invention when a drain operation is not performed.

FIG. 2 is a diagram illustrating a cross-sectional configuration during a drain operation for describing an embodiment of a drain device according to the present invention.

FIG. 3 is a cross-sectional configuration diagram illustrating an example of a conventional drain device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Housing, 2 ... Float, 3 ... Valve, 4 ... Chamber, 5 ... Drain, 6 ... Piston, 7 ... Spring, 8 ...
Packing (O-ring), 9 ... O-ring, 10 ... Slit tube, 11 ... Drain cock, 12 ... Lock nut, 13 ...
O-ring.

Claims (6)

(57) [Claims] 1. A housing in which a drain accumulates, a slit tube provided through the housing at the bottom of the housing, and an upper end portion slidably disposed in the slit tube and having an upper end located above the slit tube. An extended piston, a spring disposed between the lower surface of the upper end of the piston and the upper surface of the slit tube, and pressing the piston upward, so as to be slidable in the slit tube. And a drain cock provided below the piston. By moving the drain cock downward, the piston moves downward against the spring, and normally, the outer peripheral wall of the piston and the slit When the inner peripheral wall of the pipe is in liquid-tight contact with the piston and the piston is moved downward, the liquid-tight state is released, and the door is passed through a gap between the released parts. In the drain device in which the drain flows out through the drain cock, the inner wall surface of the slit tube and the outer wall surface of the drain cock are in liquid-tight contact, and the inner wall surface of the slit tube and the outer wall surface of the drain cock Wherein the drain does not leak to the outside through the gap. 2. An O-ring is provided on a surface of the drain cock outer wall surface which is in contact with the slit tube inner wall surface, and the O-ring is
The drain device according to claim 1, wherein a liquid-tight state is maintained between the drain cock and the inner wall of the slit tube in the entire movement range of the drain cock. 3. The slit pipe and the drain cock are connected by a lock nut screwed into a screw provided on the outer peripheral wall, and the drain cock is rotated by rotating the drain cock with respect to the lock nut. The drain device according to claim 1 or 2, wherein the cock is moved downward to move the piston downward. 4. A float is provided in the housing, and a valve is opened and closed by the float. When drain is accumulated in the housing, the float rises to open the valve, and is supplied through the valve. The drain according to any one of claims 1 to 3, wherein the piston is pushed down by air pressure to release a liquid-tight state between an inner peripheral wall surface of the slit tube and an outer peripheral wall surface of the piston. apparatus. 5. A chamber having an orifice at the top of the piston having the orifice opened and closed by the valve, wherein when the valve is opened, the chamber is compressed through the orifice into a space formed by the chamber and the upper end of the piston. The drain device according to claim 4, wherein air is introduced, and the piston is moved downward by the compressed air. 6. The slit tube has an inner wall surface having a small diameter upward and a large inner wall surface following the inner wall surface having a small diameter below, and the outer peripheral wall surface of the piston is always in contact with the inner wall surface having a small diameter. In liquid-tight contact, when moved downward, the outer peripheral wall surface of the piston faces the large-diameter inner wall surface of the slit tube,
The drain device according to any one of claims 1 to 5, wherein the drain is discharged through a gap formed between an outer peripheral wall surface of the piston and a large-diameter inner surface of the slit tube. .