JPH06307300A - Vessel having ring groove - Google Patents

Abstract

PURPOSE:To provide a vessel having a ring groove, wherein a burr or a level difference is not generated on the surface of the ring groove, and excellent in sealing performance. CONSTITUTION:This vessel 2, having a ring groove for engaging annular seal material, is divided into a first member 25 having a first groove wall 251 at one side of the ring groove and a second member 26 having a second groove wall 261 at the other side of the ring groove, and is preformed. These members 25 and 26 are joined to each other so that the first and second groove walls 251 and 261 can be adjoined to form a ring groove. The vessel 2 is used for the case, etc., of a highmolecular absorber chamber in e.g. the evaporated fuel treatment device of an automobile.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container having a ring groove, which is used in, for example, an evaporated fuel processing apparatus and has excellent sealing performance.

[0002]

2. Description of the Related Art It has been proposed to equip an automobile with an evaporated fuel processing device such as a canister in order to absorb and capture evaporated fuel in a fuel tank (for example, Japanese Patent Laid-Open No. 1-227861). As shown in FIG. 8, the vaporized fuel processing device 90 is used to prevent the vaporized fuel 80 from leaking to the atmosphere because a portion of the fuel 8 is vaporized from the fuel tank 82. The vaporized fuel processing device 90 is configured as follows, as shown in FIG. Then, there is used a container 9 containing the polymer absorbent 3 as a container having a ring groove, which is related to the present invention.

That is, as shown in FIG. 8, in this apparatus, a partition wall 2 is provided on the side surface of an activated carbon chamber 11 filled with activated carbon 4.
01 is interposed, a storage chamber 202 is provided, and the storage chamber 20
The container 9 is stored in the container 2.

The container 9 houses the polymer absorbent 3 to form a polymer chamber, and has an internal pipe 95 provided in the lower part thereof in a substantially horizontal direction. The internal pipe 95 does not pass the liquid fuel trapped as a liquid at the time of trapping the fuel but the vaporized fuel 80. Further, the internal pipe 95 is opened below the activated carbon chamber 11.

The container 9 has a cap portion 9 above it.
Have two. As shown in FIGS. 8 and 9, a seal material 291 is provided on the outer periphery of the cap portion 92 between the partition wall 201 and the outer wall 205. That is, the container 9 is as shown in FIG.
As shown in (1), it is composed of a tubular main body 91 and the cap portion 92 fitted thereon. The tubular body 91 has an inner wall 910.

Further, the cap portion 92 has a right-angled ring groove 90 provided on the upper outer periphery, a tubular portion 925, a fixing rib 923 provided on the outer periphery thereof, and an inner wall 920.
A screen 924 is provided inside the cap portion 92 to prevent the polymer absorbent 3 from popping out. The ring groove 90 is composed of groove walls 921 and 922. On the other hand, as shown in FIG. 8, the activated carbon chamber 11 is formed in the storage tank 10.

Next, the operation of the evaporated fuel processing device 90 will be described. First, as shown in FIG. 8, the fuel tank 8
The evaporated fuel 80 evaporated from 2 is introduced into the storage chamber 202 through the introduction pipe 15, and further enters the container 9 as a polymer chamber through the cap portion 92 provided above the storage chamber 202. Then, it is absorbed by the polymer absorbent 3.

On the other hand, the evaporated fuel 80 not absorbed by the polymer absorbent 3 reaches the lower space chamber 34 below the activated carbon chamber 11 through the internal pipe 95. And the evaporated fuel 80
Passes through the porous partition wall 190, enters the activated carbon chamber 11, and is adsorbed by the activated carbon 4. This state is indicated by a solid arrow in FIG.

Next, at the time of purging, the engine intake pipe 8
Due to the negative pressure at 5, as indicated by the dotted arrow in FIG.
The air 6 is taken in through the air pipe 17. Next, the air 6 enters the container 9 through the activated carbon chamber 11, the lower space chamber 34, and the internal pipe 95, and further enters the intake pipe 85 through the purge pipe 16 above the storage chamber 202. In FIG. 8, reference numerals 151 and 161 are valves.

During this time, the air causes the evaporated fuel 80 absorbed by the activated carbon 4 and the polymer absorbent 3 to be released. What is important here is that the vaporized fuel 80 or the air 6 is always brought into contact with the polymer absorbent 3 in the container 9 in any of the above-described case of capturing the fuel or purging. Therefore, the sealing by the sealing material 291 requires excellent airtightness.

[0011]

However, the above-mentioned conventional technique has the following problems. That is, as shown in FIG. 9, the sealing material 291 is attached to the ring groove 90 of the cap portion 92 of the container 9. The cap 92 is formed of synthetic resin. Further, in molding the cap portion 92, a pair of left and right molds having vertical mold divisions (partition lines) are used.

Therefore, the ring groove 90 of the cap portion 92 is
In FIG. 10, as shown in FIG. 10, burrs 98 may occur on the partition line portions of the left and right molds. As a result, when the sealing material 291 is mounted in the ring groove 90, a slight gap is generated between the sealing material 291 and the ring groove 90, and the sealing performance is deteriorated. Further, although it is necessary to deburr, since the ring groove 90 is formed by a right-angled recess in particular, deburring work is difficult.

Further, as shown in FIG. 11, a step 99 may occur at the partition line portion. In this case as well, as in the case of the burr 98 described above, a slight gap is generated to deteriorate the sealing performance. The present invention has been made in view of the above conventional problems, and an object of the present invention is to provide a container having a ring groove, which is excellent in sealing performance without causing burrs and steps on the surface of the ring groove. .

[0014]

The present invention is a container having a ring groove for fitting an annular sealing material, the container having a first groove wall of one of the ring grooves at the bottom of the ring groove. The first member and the second member having the second groove wall on the other side of the ring groove are divided into two and are preformed, and the first member and the second member are the first groove wall and the first member. A container having a sealing ring groove, wherein the two groove walls are connected to each other so as to form the ring groove adjacent to each other.

In the present invention, the most important thing is that the container is pre-formed at the bottom of the ring groove by being divided into two parts, a first member having a first groove wall and a second member having a second groove wall. That is what is being done.

The first member and the second member are resin molded bodies molded using a synthetic resin material. Therefore, the first
The member and the second member are preformed by being divided into two at the bottom of the ring groove. The bottom of the ring groove is the innermost part of the ring groove. It is preferable that each of the first groove wall and the second groove wall has an inclined surface having a taper angle of 45 degrees, for example (see FIG. 2).

With this configuration, the sealing material can be accurately attached to the ring groove having a right-angled concave shape in which the first groove wall and the second groove wall are formed so as to be adjacent to each other. The two parts are divided into, for example, two parts vertically at the bottom of the ring groove (see FIG. 1).

Further, the above-mentioned container means, for example, a case for filling a polymer absorbent in the fuel vapor processing apparatus shown in the embodiment, which has a ring groove for fitting a sealing material on its outer or inner circumference. . Further, this container means a tubular body, a tubular body with a bottom, or a cap capped on these.

[0019]

The container having the ring groove of the present invention comprises a first member having a first groove wall at the bottom of the ring groove,
It is divided into two parts including a second member having a second groove wall, and is separately molded in advance. Therefore, at the time of molding the container, a mold that can separately mold the first member and the second member is used.

Therefore, unlike the conventional container, no burr or step is formed in the longitudinal direction of the ring groove. As a result, no gap is created between the ring groove and the annular sealing material, and the sealing performance is improved. Therefore, according to the present invention, it is possible to provide a container having a ring groove, which is excellent in sealing performance without causing burrs and steps on the surface of the ring groove.

[0021]

【Example】

Example 1 A container having a ring groove according to an example of the present invention will be described with reference to FIGS. As shown in FIGS. 1 to 3, the container 2 of this example is a fuel vapor treatment system 1 for an automobile.
It is used as a polymer chamber in.

As shown in FIGS. 1 to 3, the vaporized fuel processing apparatus 1 has an internal pipe 21 in which the container 2 is arranged adjacent to an activated carbon chamber 11 and a vapor transfer communication passage 210 is formed in the container 2. Is provided. That is, as shown in FIG. 3, in the device of this example, the partition wall 2 is provided on the side surface of the activated carbon chamber 11.
01 is interposed, a storage chamber 202 is provided, and the storage chamber 20
The container 2 is arranged in the container 2.

As shown in FIG. 2, the container 2 has a ring groove 20 into which an annular sealing material 291 is fitted. As shown in FIG. 1, the ring groove 20 is divided into a first member 25 having a first groove wall 251 on one side and a second member 26 having a second groove wall 261 on the other side, as shown in FIG. It will be done.

The two members 25 and 26 are separately molded using synthetic resin. The ring groove 2
As shown in FIG. 2, the bottom portion 204 of 0 is the innermost portion of the ring groove, and the first member 25 and the second member 26 are vertically divided into two in the horizontal direction of the bottom portion 204. There is.

As shown in FIG. 2, the first member 25 and the second member 26 are the same as the first groove wall 251 and the second groove wall 261.
And are connected to each other so as to form a ring groove 20 adjacent to each other. Then, the first member 25 and the second member 26
And are joined by an adhesive, press-fitting, undercut stop, or the like to form the container 2.

Further, as shown in FIG.
Is an annular body having a quadrangular cross section, and is fitted in the ring groove 20. The sealing material 291 is made of an elastic member such as rubber or a foamed resin molded product. The first groove wall 251 and the second
The groove wall 261 has inclined surfaces each having a taper angle θ of 45 degrees (FIG. 1).

Further, as shown in FIG. 1, the first member 25
The container 2 is formed by fitting the positioning ribs 252 provided on the outer periphery of the container to the inner wall surface 260 of the cylindrical second member 26. In addition, at the bottom portion 204 of the ring groove 20, the step portion 253 of the first member 25 and the second member 26 are provided.
There is a space portion 290 formed by the step portion 262 and the step portion 262.

This space portion 290, as shown in FIG.
When the second member is housed in the absorption chamber 202 and the sealing material 291 is pushed inward, the sealing material 291 is inserted into the space 29.
A slight bite occurs within 0, further improving the sealing property.

Further, as shown in FIG. 3, the container 2 houses the polymer absorbent 3 and has an internal pipe 21 provided in the lower part thereof in a substantially horizontal direction. The internal pipe 21
Has a vapor transfer communication passage 210 through which the liquid fuel captured as a liquid at the time of fuel capture does not pass but the evaporated fuel 80 passes.

The inner pipe 21 extends in the diametrical direction of the container 2, and the steam outlet 212 thereof opens outside the container 2, that is, to the opening 203 below the activated carbon chamber 11, while the steam inlet part 211 is located in the back direction of the container 2. A space chamber 230 is provided in front of the steam inlet portion 211.

The first member 25 of the container 2 has a mesh 2 attached thereto.
A guide fin 2 is also provided on the side surface of the container 2 for positioning inside the storage chamber 202.
With 92. In the ring groove 20 in the upper part of the container 2, an annular seal material 291 is provided between the partition wall 201 and the outer wall 205.
Is installed. Further, a spring coil 207 for stably holding the container 2 is provided between the screen lid and the ceiling plate 206 of the storage chamber 202. Ceiling board 2
A purge pipe 16 and an introduction pipe 15 are connected to 06.

On the other hand, the activated carbon chamber 11 is formed by filling the storage tank 10 with the activated carbon 4. In addition, in the container 2, a space chamber 230 is provided so that the purge air is evenly aerated from the lower part to the polymer absorbent 3.

Further, the polymer absorbent 3 is used in this space chamber 230.
A non-woven fabric 235 having air permeability is attached so as not to drop off and to suck up the liquid fuel accumulated in the space chamber 230 toward the polymer absorbent. Others are the same as the conventional example.

Specific examples of the polymer absorbent include polypropylene, polyisoprene, polybutadiene, polyisobutylene, polystyrene, polynorbornene, polydimethylsiloxane, ethylene-propylene-diene copolymer, styrene-butadiene. There are copolymers, ethylene-propylene copolymers, isobutylene-isoprene copolymers, butadiene-acrylonitrile copolymers, and one or more of these are used.

The polymer absorbent may be an uncrosslinked polymer or a crosslinked polymer (polymer gel), and any of them can be used. The former uncrosslinked polymer is of a type that dissolves or expands in fuel and is generally called a hydrophobic polymer. The homopolymer such as polyisoprene and the copolymer such as styrene-butadiene copolymer are is there.

Next, the function and effect will be described. In the container 2 having the ring groove 20 of this example, as shown in FIG. 1, the first member 25 having the first groove wall 251 and the second member 2 having the second groove wall 261 at the bottom of the ring groove 20.
It is divided into 6 and 2.

Therefore, when the container 2 is molded, as shown in FIG.
As shown in FIG. 7, a mold 7 including an upper mold 71 and a lower mold 72 having horizontal (vertical) partition lines 74.
To use. The mold 7 is for molding the first member 25 and has a cavity 70 having the same shape as that of the first member 25.

Thus, the first member 25 and the second member 26
And are molded separately. Therefore, unlike the conventional container 9, no burr 98 or step 99 is formed in the vertical direction (see FIGS. 10 and 11).

As a result, the ring groove 20 and the sealing material 291 are formed.
As shown in FIG. 2, there is no gap between the and. Therefore, the sealing performance of the sealing material 291 is improved. The first groove wall 251 and the second groove wall 261 each have a taper surface θ of 45 degrees as shown in FIG.

Therefore, in the ring groove 20, as shown in FIG.
As shown in FIG. 5, the sealing material 291 can be attached accurately and easily. In addition, the function and effect of the evaporated fuel processing device are similar to those of the conventional example.

Embodiment 2 As shown in FIGS. 5 to 7, the container 2 of this embodiment is provided with a cap seal portion 2A on the upper portion thereof, and the cap seal portion 2A
It is divided into a first member 27 and a second member 28. These are fitted to the upper portion of the tubular body 26A and are then attached to the container 2
Make up.

The first member 27, as shown in FIG.
An inner wall 27 having a first fitting locking portion 272 below the main body 271 and a screen lid 259 arranged below the first locking portion 272.
Has 0.

The second member 28, as shown in FIG.
A locking collar 283 and a fitting locking portion 2 are provided below the main body 281.
84. Also, as shown in FIGS. 5 and 6, the first member 27 and the second member 28 have a first groove wall 276 and a second groove wall 286 for forming the ring groove 20.

In assembling the cap seal portion 2A, as shown in FIG. 6, first, the first fitting engagement portion 272 of the first member 27 is fitted to the fitting inner peripheral portion 285 of the second member 28. Then, the two are firmly bonded using an adhesive, press-fitting, undercut stop, etc. Next, the second member 28
The second fitting locking portion 284 is fitted to the inner wall 260 of the tubular body 26A, and these are firmly coupled (FIGS. 5 and 7).

As a result, as shown in FIG.
The container 2 in which the member 27, the second member 28, and the tubular body 26A are integrated can be obtained. Then, as shown in FIG. 7, a sealing material 291 is attached to the ring groove 20 formed by the first groove wall 276 and the second groove wall 286. Others are the same as in the first embodiment. Also in this example, the same effect as that of the first embodiment can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a container having a ring groove divided into two according to a first embodiment.

FIG. 2 is an enlarged cross-sectional view of a main part of the container according to the first embodiment.

FIG. 3 is an overall explanatory diagram showing a usage state of a container in the evaporated fuel processing apparatus according to the first embodiment.

FIG. 4 is a sectional view of a mold for molding the first member of the container according to the first embodiment.

FIG. 5 is an explanatory view showing an assembled state of the container according to the second embodiment.

FIG. 6 is an explanatory view showing an assembled state of a container having a ring groove divided into two according to the second embodiment.

FIG. 7 is an explanatory view showing a finished state of assembling the container having the ring groove according to the second embodiment.

FIG. 8 is an overall explanatory view showing a usage state of a container in a conventional evaporated fuel processing apparatus.

FIG. 9 is an enlarged view of a main part of a conventional container.

FIG. 10 is an explanatory view showing a problem at the time of molding a conventional container.

FIG. 11 is an explanatory view showing another problem at the time of molding a conventional container.

[Explanation of symbols]

 1. ． ． Evaporative fuel processing device, 2. ． ． Container, 20. ． ． Ring groove, 25, 27. ． ． First member, 251,276. ． ． First groove wall, 26, 28. ． ． Second member, 261,286. ． ． Second groove wall, 291. ． ． Seal material, 3. ． ． Polymer absorbent, 4. ． ． Activated carbon,

Claims (1)

[Claims] 1. A container having a ring groove for fitting an annular sealing material, wherein the container has a first member having a first groove wall of one of the ring grooves at the bottom of the ring groove, 2 to the second member having the other second groove wall of the ring groove
It is divided and preformed, and the first member and the second
The member is a container having a ring ring for sealing, characterized in that the first groove wall and the second groove wall are connected to each other so as to form the ring groove adjacent to each other.