JPH0326400Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a device for draining water accumulated in the bowl of an air filter.

Problems to be solved by conventional techniques and ideas The general structure of this type of air filter drainage device is that a cylindrical holder is fitted into a through hole formed in the bottom of the bowl so that it cannot rotate or move up and down. The lower end of the valve body protrudes below the bowl, and the valve body has a drain hole extending from the lower end to the side surface near the upper end, and has a flange at the upper end, and an elastic material is inserted between the lower surface of the flange and the bottom surface of the bowl. It is fitted into a holder with a ring-shaped valve seat sandwiched therebetween, non-rotatably but freely movable up and down, with the lower end having a male thread formed on the outer periphery protruding downwards of the holder, and fitted freely around the outer periphery of the holder. The female thread formed on the downwardly protruding part of the holder of the attached cylinder is screwed into the male thread of the valve body, and the valve seat is elastically contracted by the collar by the downward movement of the valve body due to normal rotation of the cylinder. At the same time, the valve body is moved upward by reversing the cylindrical body, thereby releasing the elastic contraction of the valve seat and opening the drain hole.

By the way, in conventional drainage devices, the upward movement of the valve body is not regulated, so when the cylinder body is reversed to move the valve body upward to discharge water, it is possible to accidentally move the valve body more than necessary. When it is moved upward, the female thread of the cylinder comes off from the male thread of the valve body, and once the screw is removed, the valve body cannot be moved down even if the cylinder is rotated in the normal direction, making it impossible to seal the drain hole. figure,
To reattach the screws that came off, you must first remove the bowl from the air filter body, insert your hand into the bowl, hold the valve body, and screw the female thread of the cylinder into the male thread of the valve body. There was a problem that took time to repair.

Means for Solving the Problems As a means for solving the above problems, the air filter drainage device of the present invention combines a valve seat with a holder and attaches the valve seat to the outer periphery of the upper part of the valve body. The valve body has a structure in which an upwardly facing stepped portion is formed in contact with the lower surface to restrict upward movement of the valve body beyond a predetermined position.

Functions and Effects of the Invention The present invention has the above-mentioned configuration, and by reversing the cylindrical body and moving the valve body upward, the elastic contraction of the valve seat is released and the drainage hole is opened, thereby draining the water accumulated in the bowl. When draining water, when the cylinder body continues to be reversed and the valve body moves up to a predetermined position, the upward step formed on the outer periphery of the upper part of the valve body connects with the holder and hits the bottom surface of the valve seat, and then If the cylinder is reversed, the valve body will move upward against the elasticity of the valve seat, making it difficult to rotate the cylinder, so do not over-rotate the cylinder until the screws come off when draining water. This can be reliably prevented, and since the valve seat is used to restrict the upward movement of the valve body, there is an effect that a new restriction component is not required.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the accompanying drawings.

In the air filter to which the present invention is applied, as shown in FIG. Moisture mixed into the air is removed while entering the inside thereof, and then flows out through the outlet 5 through the inside of the cylindrical portion 3, and the water removed by the filter element 4 is attached to the lower surface of the body 1. It is designed to drip and collect in the bowl 11.

Next, the structure of the drainage part will be explained.

A stepped through hole 12 with a reduced diameter at the lower end is formed in the center of the bottom of the bowl 11, and a cylindrical holder 21 made of hard synthetic resin is attached to the through hole 12, and a cylindrical holder 21 made of hard synthetic resin is attached to the upper end. A ring-shaped valve seat 31 made of elastic soft synthetic resin is coupled to the holder 21, and two mounting holes 22 are formed through the inner peripheral surface of the upper end of the holder 21 at an interval of 180 degrees. On the other hand, the valve seat 31 has two protrusions 33 formed on the outer circumferential surface of a fitting portion 32 formed on the lower surface side and having a reduced diameter.
2 into the upper end of the holder 21 while elastically deforming the protrusion 33 and fitting the protrusion 33 into the mounting hole 22, the valve seat 31 is integrally coupled to the upper end of the holder 21. The holder 21 that has been combined with the holder 21 is pushed in from the upper surface side of the through hole 12 of the bowl 11 while reducing the diameter of the leg portion 24 with the slot 23 inserted thereinto, so that the stepped portion of the holder 21 and the leg portion 24
By sandwiching the upper and lower mouth edges of the reduced diameter portion of the through hole 12 between the hook portions 25 formed on the outer periphery of the holder 21, the protrusion 2 formed on the outer periphery of the holder 21 is made immobile.
6 is fitted in a groove 13 formed on the inner circumferential surface of the through hole 12 so as to be non-rotatable.
A cylindrical body 41 made of hard synthetic resin with a female thread 42 formed on the constricted part of the inner circumferential surface is pushed in from the bottom side while reducing the diameter of the leg 24, and is inserted into the inner part above the female thread 42. Circumferential groove 43 formed on the circumferential surface
By fitting a locking protrusion 27 provided around the outer peripheral surface of the leg portion 24, the leg portion 24 can be freely rotated. Also, in the holder 21, a collar 5 is provided at the upper end.
A valve body 51 made of a hard synthetic resin is fitted into the valve body 51, which forms a drain hole 53 formed in the outer peripheral surface slightly below the lower end face and the upper end. A protrusion 54 that fits into the inner circumference of the slot 23 of the holder 21 is formed on the outer peripheral surface. A male thread 55 is cut in the lower part of the cylindrical body 41 to engage with the female thread 42 of the cylindrical body 41. This valve body 51 is inserted from the upper surface side of the valve seat 31, and the inclined part 57 at the lower end of the protrusion 54 is inserted into the valve seat 31 from the upper surface side. The protrusion 54 is fitted into the inner circumferential side of the slot 23 of the holder 21 by hitting the stepped part of the inner surface of the valve seat 31 and being pushed in while expanding the inner surface due to elastic deformation, and the protrusion 54 is fitted into the inner peripheral side of the slot 23 of the holder 21, and the right angle part of the upper end of the protrusion 54 is inserted. 56 passes through the inner periphery of the valve seat 31, the lower end of the male thread 55 is screwed into the upper end of the female thread 42 of the cylinder 41, and the cylinder 41 is rotated in the forward direction, so that the upper end of the protrusion 54 By pulling the valve body 51 toward the cylindrical body 41 until the right-angled portion 56 passes through the valve seat 31, the valve body 51 is fitted into the holder 21 in a non-rotatable manner and can move freely up and down. When the cylindrical body 41 is further rotated in the forward direction, the valve body 51 gradually moves downward and is drawn toward the cylindrical body 41, and the valve seat 31 is moved between the lower surface of the collar 52 of the valve body 51 and the bottom surface of the bowl 11. When the cylindrical body 41 is rotated in the opposite direction, the valve body 51 is lifted up. As the valve seat 31 moves, the valve seat 31 gradually loosens and further loosens the collar 52.
A gap is formed between the valve seat 31 and the valve seat 31, and water in the bowl 11 is discharged from the gap through the drain hole 53 of the valve body 51 to the outside.

In this embodiment, the bottom edge of the center hole of the valve seat 31 connected to the holder 21 is connected to the valve body 5.
1 moves upward, the right angle part 56 at the upper end of the protrusion 54
Since the abutment surface 34 abuts against the ridge 54, when the cylinder body 41 is rotated in the opposite direction to move the valve body 51 upward during drainage, the right-angled portion 56 of the protrusion 54 is moved upward as shown by the solid line in FIG. is the abutment surface 34 of the valve seat 31
After hitting the cylinder body 41, the rotation operation of the cylinder body 41 becomes difficult.
If the rotation of the cylindrical body 41 is stopped here, the male thread 55 of the valve body 51 and the female thread 42 of the cylindrical body 41 are maintained screwed together without coming off, as shown by the solid line in the figure, and then the cylindrical body 41 By rotating the valve in the forward direction, the valve body 51 is moved down as described above, and the collar 5 is moved downward.
2 and the bottom of the bowl 11 are sealed.

Note that when the cylinder body 41 is further rotated in the opposite direction after the right-angled portion 56 of the protrusion 54 contacts the abutment surface 34 of the valve seat 31, the reduced diameter portion 32 of the valve seat 31 is deformed against elasticity. However, if the length of the male thread 55 is short, there is a risk that it may come off from the female thread 42, but even in this case,
Due to the restoring elasticity of the reduced diameter portion 32 of the valve seat 31, the male thread 5
Since the lower end of 5 is pressed against the upper end of the female screw 42, when the cylinder 41 is rotated in the forward direction, the male screw 55 bites into the female screw 42 and screws together, causing the subsequent rotation of the cylinder 41. The valve body 51 can be moved downward by rotation in the forward direction.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an air filter to which an embodiment of the present invention is applied, Fig. 2 is an exploded perspective view of the structure of its drainage section, and Fig. 3 is a partially enlarged sectional view for explaining its operation. . 11: Bowl, 12: Through hole, 21: Holder, 2
2: Mounting hole, 31: Valve seat, 33: Protrusion, 3
4: Abutment surface, 41: Cylindrical body, 42: Female thread, 51:
Valve body, 52: Tsuba, 53: Drain hole, 54: Projection, 5
5: Male thread, 56: Right angle part (of protrusion 54).

Claims (1)

[Scope of utility model registration request] A cylindrical holder is fitted into a through hole formed in the bottom of the bowl so that it cannot rotate or move up and down, the lower end of the bowl protrudes downward, and a drainage hole is provided that is transparent from the lower end to the side surface near the upper end. A valve body having a flange at its upper end is inserted into the holder so as to be non-rotatable and freely movable up and down, with a ring-shaped valve seat made of an elastic material sandwiched between the lower surface of the flange and the bottom surface of the bowl. A lower end portion with a male thread formed on the outer periphery of the holder protrudes downward from the holder, and a female thread formed on the downwardly protruding portion of the holder of the cylindrical body rotatably fitted on the outer periphery of the holder is connected to the male thread of the valve body. screwed together,
The downward movement of the valve body due to normal rotation of the cylindrical body causes the valve seat to elastically contract at the brim, thereby sealing the drain hole, and the upward movement of the valve body due to the reverse rotation of the cylindrical body causes the valve seat to be elastically contracted by the brim, thereby sealing the drain hole. In the air filter drainage device, in which the valve seat is released from elastic contraction to open the drainage hole, the valve seat is coupled to the holder, and the valve seat is attached to the outer periphery of the upper part of the valve body. 1. A drainage device for an air filter, characterized in that an upward step is formed in contact with a lower surface of the valve body to restrict upward movement of the valve body beyond a predetermined position.