JPH0228209Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a cap with a valve used, for example, in a fuel cap for an automobile.

<Prior art> A negative pressure release valve is installed in the fuel cap of an automobile to release the negative pressure inside the fuel tank.
As shown in FIG. 10, this type of cap with a negative pressure release valve has a hollow main body 31 that is screwed onto a fuel inlet part 37, and a valve body that is opened by negative pressure inside the main body 31. A fuel cap is manufactured in which the valve hole 32 is disposed in the upper part of the main body 31 (for example, see Japanese Utility Model Application Publication No. 59-22756). This fuel cap has a relatively large valve body 3 inside the main body 31.
2. Since a holding plate 33 that holds the valve body 32, a coil spring 34 and a spring holding plate 35 that bias the valve body 32 in the closing direction are built-in, the valve body 32
There is a demand for a smaller and lighter valve device including the coil spring 34 and the coil spring 34, and fuel caps in which a small valve device is provided within the main body 31 have been developed.

<Problems to be solved by the invention> However, as valve devices have become smaller and assembly robots have come to be used on the assembly line for valved caps, small valve bodies and retaining plates have to be assembled one by one inside the cap. It is difficult to assemble the valve body in an accurate position, and the mounting positions of the valve body, coil spring, etc. may shift, resulting in a problem that the assembling workability deteriorates.

<Means for Solving the Problems> The present invention was developed in consideration of the above points, and the valve unit can be easily assembled into the cap body in a pre-integrated state, and can be assembled accurately and efficiently. This provides a cap with a valve that can be assembled, and is constructed as follows.

That is, in the cap with a valve of the present invention, the main body held by the holding plate is attached to the valve hole provided in the hollow main body while being biased by the coil spring.
In a cap with a valve, in which a spring holding plate that holds one end of a coil spring is fitted and held in a fitting holding part provided in the main body, a plurality of elastic locking legs are protruded from the back side of the holding plate, and the spring holding plate holds one end of a coil spring. The stop leg is provided with a protrusion that is locked with the locking part at the tip of the assembly jig, and the spring holding plate is provided with an inner hole into which the assembly jig is inserted. When inserted into the hole, the locking part of the assembly jig engages with the protrusion of the locking leg, and the intermediate protrusion provided on the outer periphery of the intermediate part of the assembly jig comes into contact with the back side of the spring holding plate. The holding plate and the spring holding plate are configured to be integrated by an assembly jig.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 shows a sectional view of the valved cap.
The main body 1 of the cap with a valve is formed into a hollow cylindrical shape, has a male thread formed on its outer periphery, and has a valve hole 2 bored in its inner upper part. Reference numeral 3 denotes rib-shaped fitting and holding parts that stand radially in the main body 1, leaving a central part, and a notched recess 3a that fits and holds an edge of a spring holding plate 7 of a valve unit 20, which will be described later, is placed inside. is forming.

4 is a cup-shaped valve body, 5 is a holding plate that holds the valve body 4 on its upper surface, and as shown in FIGS. Two elastic locking legs 6 are provided on both sides near the center with protrusions projecting outward. As shown in FIGS. 4 and 5, the spring holding plate 7 is formed into a disk shape that is slightly larger than the holding plate and has an inner hole 7a in the center, and its peripheral edge is bent downward to fit inside the main body 1. It has a structure in which it is fitted and fixed into a notched recess 3a of the joint holding part 3. In addition, the spring holding plate 7
An annular protrusion 7b that holds the lower end of the coil spring 8 in a central position is provided on the upper surface, and an annular protrusion 7c that abuts an intermediate protrusion 13 of an assembly jig 10, which will be described later, is provided on the lower side of the annular protrusion 7b. It will be done. The assembly jig 10 is configured to hold and integrate a holding plate 5 with a valve body 4 attached thereto and a spring holding plate 7 with a coil spring 8 interposed therebetween to form a valve unit 20, as shown in FIG. , as shown in FIG. 7, the cylindrical body 11
An intermediate protrusion 13 that contacts the back side of the spring holding plate 7 is provided on the outer periphery of the spring holding plate 7, and a locking portion 12 is provided at the upper end. This locking part 12 is configured to protrude inward and engage with the locking leg 6 of the holding plate 5, and the outer diameter of the cylindrical body 11 is the inner hole 7a of the spring holding plate 7.
It is sized to fit tightly into the Cylindrical body 1
Four slits 14 are vertically inserted into the upper part of the locking part 1 to facilitate the bending of the locking part 12. 15
is a gripping protrusion provided at the lower end of the cylindrical body 11.

The valve cap constructed as described above is assembled in the following manner during manufacture.

First, the spring holding plate 7 is inserted into the assembly jig 10 so as to pass through the inner hole 7a from above, and the annular protrusion 7c of the spring holding plate 7 is brought into contact with the intermediate protrusion 13 of the assembly jig 10. After fitting the holding plate 5 holding the valve body 4 onto the upper part of the assembly jig 10 with the coil spring 8 interposed therebetween, the retaining plate 5 holding the valve body 4 and its locking leg 6 and the locking part 12 of the assembly jig 10 are attached. The valve unit 20 is made by fitting by locking.

Next, as shown in FIG. 8, this valve unit 20 is assembled into an assembly jig 10 using an assembly robot or an operator's fingers.
While grasping the lower part of the spring holding plate 7, insert it into the center of the main body 1, and insert the outer peripheral edge of the spring holding plate 7 into the main body 1.
Fit it by pushing it into the notch recess 3a of the fitting holding part 3 inside. In this state, hold plate 4
By pushing up only from the inside lower part of the assembly jig 10, the engagement between the locking leg 6 and the locking part 12 is released, and the spring force of the coil spring 8 causes the holding plate 5 to be removed.
is lifted, the valve body 4 is brought into close contact with the periphery of the valve hole 2, and finally the assembly jig 10 is attached to the spring holding plate 7.
The valve cap is pulled out from the inner hole 7a, and the assembly of the valve cap is completed as shown in FIG. In this state, the holding plate 5 holding the valve body 4 becomes vertically slidable while being guided by the upper part of the fitting holding part 3.

FIG. 9 shows a sectional view of a valve unit 25 as another embodiment. The assembly jig 26 used for this valve unit 25 has a locking part 26a projecting outwardly formed at the top of its cylindrical body.
A bulging portion 26b is provided below a. On the other hand, a locking leg 27a protruding from the lower side of the holding plate 27 that holds the valve body 4 is provided with a protrusion projecting inwardly, and this locking leg 27a is connected to the locking portion 26a of the assembly jig 26. is locked. The spring retaining plate 28 and the retaining plate 27 are assembled to the assembly jig 26 with the coil spring 8 interposed therebetween, and the valve unit 25 is inserted into the cap body in the same manner as described above. , spring retaining plate 28
is fitted into the fitting holding part 3. Then, when the assembly jig 26 is pulled out, the valve body 4 etc. are properly set in the cap body, but when the assembly jig 26 is pulled out, the bulge 26b is attached to the inner peripheral edge of the spring holding plate 28. The locking leg 27a bends inward when the upper locking portion 26a hits the
The assembly jig 26 can be easily removed from the assembly jig 26.

<Effects of the invention> As explained above, according to the valve cap of the present invention, the valve body, holding plate, coil spring, etc. are temporarily fixed to the assembly jig to create the valve unit during assembly and manufacturing. This valve unit can be fitted into the cap body, the assembly jig can be removed from it, and the valve body etc. can be set in the correct position. Therefore, compared to the conventional work of assembling each part one by one into a narrow main body, the assembly work can be done much more easily and efficiently using an assembly robot, etc., and the position of the valve body can be easily adjusted. It is possible to produce products of good quality with no deviations.

[Brief explanation of the drawing]

1 to 9 show an embodiment of the present invention, in which FIG. 1 is a partial cross-sectional view of a cap with a valve, FIG. 2 is a bottom view of a holding plate, and FIG. 3 is a cross-sectional view of FIG. FIG. 4 is a plan view of the spring holding plate 7, and FIG.
The figures are a sectional view of FIG. 4, a plan view of the assembly jig, a plan view of the assembly jig, a sectional view of FIG.
The figure is a sectional view showing the assembled state of the valve unit.
The figure is a sectional view of a valve unit of another embodiment, and FIG. 10 is a sectional view of a conventional valve cap. DESCRIPTION OF SYMBOLS 1... Main body, 2... Valve hole, 3... Fitting holding part, 4... Valve body, 5... Holding plate, 6... Locking leg, 7... Spring holding plate, 7a... Inner hole, 8... Coil spring, 10
...Assembling jig, 12...Locking part.

Claims (1)

[Claims for Utility Model Registration] A valve body held by a holding plate is attached to a valve hole provided in a hollow main body while being biased by a coil spring, and a spring holding plate holding one end of the coil spring is attached. In the cap with a valve that is fitted and held in a fitting holding portion provided in the main body, a plurality of elastic locking legs are provided protruding from the back side of the holding plate, and an assembly jig is attached to the locking legs. The spring holding plate is provided with a protrusion that is locked to a locking portion at the tip thereof, and the spring holding plate is provided with an inner hole for inserting the assembly jig, and the assembly jig is inserted into the spring holding plate. When inserted into the hole, the locking part of the assembly jig engages with the protrusion of the locking leg, and the intermediate protrusion provided on the outer periphery of the intermediate part of the assembly jig engages with the back side of the spring holding plate. A cap with a valve is configured to abut on the retaining plate and the spring retaining plate by the assembly jig.