JP2516211Y2 - Packing installation structure - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing installation structure such as a U packing and an O-ring, and more particularly to a packing installation structure for preventing deformation when the packing is mounted.

[0002]

2. Description of the Related Art Packings such as U-packings and O-rings are widely used for fluid seals. To use such a packing, an annular packing is attached to the outer periphery of a cylindrical or columnar first member, and the first member together with the packing is attached to the inner hole of a second member having a circular inner hole. It is generally done by inserting.

[0003]

When the first member is inserted, there is a problem that the packing is easily damaged, the packing is kinked, and the packing is easily turned over (in the case of U packing). That is, since the outer diameter of the packing attached to the outer circumference of the first member is slightly larger than the inner diameter of the inner hole of the second member, the packing is not larger than the inner peripheral surface of the inlet portion of the inner hole. Rubbing causes the above problems to occur.

[0004]

According to the packing installation structure of the present invention, an annular packing is attached to the outer periphery of a cylindrical or cylindrical first member, and a second member having a circular inner hole is provided. In a packing installation structure in which a first member is inserted into the inner hole together with the packing, the inlet portion of the inner hole of the second member is chamfered to form a tapered surface, and the tapered surface is It is characterized in that a spiral groove for guiding a packing is inserted.

[0005]

In the packing installation structure of the present invention, the first member is inserted into the inner hole of the second member while being twisted in the same direction as the spiral. Then, the packing is guided by the spiral guide groove along the tapered surface of the inner hole,
The second member can be smoothly inserted into the inner hole, and the packing can be prevented from being damaged or deformed.

[0006]

Embodiments will be described below with reference to the drawings. FIG. 3 is a vertical cross-sectional view of a hot and cold water mixing faucet to which the structure of the present invention is applied, and FIG. FIG. 1 is a cross-sectional view of a member to which the structure according to the present invention is applied, which is used in this mixed faucet, and FIG. 4 is a cross-sectional perspective view showing the shapes of the tapered surface and the guide groove.

This mixing faucet 10 is a single lever type hot and cold water mixing faucet. By rotating the lever handle 12 vertically and horizontally and horizontally, the ceramic disc valve 14 is moved forward, backward, leftward and rightward. 1
The passage for the ceramic disc valve 16 overlapping 4 is opened / closed to adjust the amount of water discharged from the water discharge pipe 18 (including stopping water) and the temperature of the water discharge. A leg tube for hot water and a leg tube for water 22 are connected to the bottom of the faucet body 20, and water and hot water supplied from these leg tubes 22 pass through a water channel in a block 24 in the faucet body 20. It is introduced into the opening of the ceramic disc valve 16. Ceramic disc valve 1
The mixed water mixed in 4 and 16 is
A water passage 2 formed through an inner water passage 26 and between an outer peripheral surface of the block 26 and an inner peripheral surface of a column 28 surrounding the block 26.
9 is further introduced into the water discharge pipe 18 through the opening 30 on the side peripheral surface of the column 28. 32 is a water discharge pipe 18
Shows the spout at the tip of the.

The block 24 has a columnar shape, and a water channel 32 for water and a water channel 34 for hot water are vertically formed. The column 28 has a cylindrical shape that is fitted onto the cylindrical block 24, and the water discharge pipe 18 is fixed to the side peripheral surface of the column 28 by welding or the like.

In order to seal the upper and lower sides of the water passage 29, packing mounting grooves 36 and 38 are formed on the outer peripheral surface of the block 24, and U packing 40 and 40 are formed in the packing mounting grooves 36 and 38.
42 is attached. This column 28 is block 24
On the other hand, the ring 44 is inserted from above, and the ring 44 prevents the stopper from coming off.

Before this insertion, the packing 40,
42 is mounted on the block 24. Then, in order to prevent the packings 40 and 42 from being caught on the inner peripheral edge of the lower end of the column 28, the inner peripheral surface of the lower end of the column 28 is chamfered to form a tapered surface 46.

Further, as shown in FIG. 1, a spiral groove 48 for rotating the U packings 40 and 42 when the U packings 40 and 42 are inserted is formed in the tapered surface 46.

By thus providing the tapered surface 46 and the spiral groove 48, when the column 28 is fitted in the block 24, the column 28 is fitted in the block 24 while rotating the column 28 in the spiral direction of the spiral groove 48. To combine. Then, the U packings 40, 42 are guided by the spiral groove 48 and enter the inner peripheral surface of the column 28 very smoothly, and the packings 40, 42 are not twisted or damaged at all. Then, as shown in FIG. 2, the U packings 40 and 42 can be accommodated in the packing mounting groove 38 in a proper posture, and the water sealing property becomes extremely good.

In the above embodiment, the block 24
Corresponds to the first member, the column 28 corresponds to the second member, and the inner hole of the column 28 is inserted into the inner hole of the second member.

Although the above-described embodiment is applied to a mixed faucet, it is obvious that this embodiment can be applied to other various members.

Further, although the above embodiment is applied to the mounting structure of the U packing, the present invention is also applicable to the mounting structure of the O-ring.

[0016]

[Effects of the Invention] As described above, according to the packing installation structure of the present invention, deformation such as scratches and twists when mounting the U packing or O ring is reliably prevented, and the packing mounting work is extremely easy and quick. In addition to the above, the fluid sealing property can be remarkably improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a column of a mixing faucet to which an example structure is applied.

FIG. 2 is a cross-sectional view of a main part of a mixed faucet.

FIG. 3 is a cross-sectional view of a mixing faucet.

FIG. 4 is a cross-sectional view of a main part of a column.

[Explanation of symbols]

 10 Mixing Faucet 12 Lever Handle 14 Ceramic Disc Valve 16 Ceramic Disc Valve 18 Water Discharge Pipe 20 Faucet Main Body 24 Block 28 Column 36 Packing Mounting Groove 38 Packing Mounting Groove 40 U Packing 42 U Packing 46 Tapered Surface 48 Guide Groove

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takashi Kojima, 3-6, Koiemotocho, Tokoname City, Aichi Prefecture Inax Co., Ltd. (72) Inventor, Towa Kikuchi, 3-6, Koiemotocho, Tokoname City, Aichi Prefecture (56) References JP-A-3-14969 (JP, A) JP-A-2-47493 (JP, A) JP-A-48-87246 (JP, A)

Claims (1)

(57) [Scope of utility model registration request] 1. A ring-shaped packing is mounted on the outer periphery of a cylindrical or columnar first member, and the first member is inserted together with the packing into the inner hole of a second member having a circular inner hole. In the packing installation structure as described above, the inlet portion of the inner hole of the second member is chamfered to form a tapered surface, and the tapered surface has a spiral groove for guiding the packing during insertion. The packing installation structure is characterized by the provision of