JPH10277552A - Diaphragm body of ionic water generating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent wrinkles from being produced on a diaphragm or damage to the diaphragm at the time of ultrasonic welding by, when the diaphragm is ultrasonic-welded between two resin frames, forming a cone-shaped bead integrally on one of the resin frames and a recess groove at a portion of the other resin frame in opposition to the bead. SOLUTION: In an electrolysis vessel for use in an alkaline ionic water generator, a cathode plate, a diaphragm body 15, an anode plate, a diaphragm body 17, and a cathode plate are stacked successively between two cases. Each of the diaphragm bodies 15, 17 is formed by interposing a diaphragm 22 between resin frames 20, 21 and a bead 24 having a cone-shaped cross section is formed on one frame 20, while a fitting groove 23 for fitting engagement with the frame 20 is formed on the inner side of the frame 21. And for assembling the bodies 15, 17, both the frames 20, 21 are welded to each other by means of an ultrasonic welding machine, in which a melted portion of the bead 24 is caused to flow into a recess groove 25 to prevent an external force from acting on the diaphragm 22 so that wrinkles are prevented from being produced on the diaphragm 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diaphragm used in an electrolytic cell of an ionic water generator for generating alkaline ionized water and acidic water by electrolyzing tap water or the like.

[0002]

2. Description of the Related Art In a diaphragm used in an electrolytic cell for generating alkaline ionized water and acidic water by electrolyzing tap water or the like, a pair of resin support frames is disclosed, for example, in JP-A-3-270784. 6, a mountain-shaped bead 2 is integrally protruded from one of the support frames 1 as shown in FIG. 6, for example. And the supporting frames 1 and 4 were welded to each other.

[0003] In this case, there is a problem that the bead portion is melted during ultrasonic welding and flows out to the surroundings, and this flow causes wrinkles in the diaphragm or breakage of the diaphragm.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to prevent wrinkles and breakage of a diaphragm during ultrasonic welding of a resin frame.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a method for ultrasonically welding a diaphragm between a pair of resin frames, wherein a mountain-shaped bead is integrally provided on one of the resin frames and the other resin frame is provided. And a relief groove is formed in the bead-facing portion.

Further, in the present invention, the side wall of the escape groove is provided with a taper.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described first with reference to FIG. 1. Reference numeral 11 denotes an electrolytic cell used for an alkaline ionizer or the like, and a cathode plate 14 and a diaphragm are provided between a pair of cases 12 and 13.
15, the anode plate 16, the diaphragm 17 and the cathode plate 18 are sequentially stacked and housed, and a packing 19 is interposed around the anode plate 16.

The diaphragms 15 and 17 are formed by sandwiching a diaphragm 22 between a pair of resin frames 20 and 21 as shown in FIG.

On the other hand, for example, as shown in FIG. 3, one of the resin frames 20 and 21 is
Fitting groove inside the other frame so that it fits inside 21
23 are integrally formed, and even if one frame 20
A cross-sectionally projecting bead 24 having a mountain-like shape is formed at an appropriate position on the surface facing the other frame 21, and the portion of the other frame 21 facing the bead 24 is shallower than the height of the bead.
A cross section wider than the width of the bead has a rectangular relief groove 25 recessed.

At the time of assembling the diaphragm members 15 and 17, as shown in FIG.
After the diaphragm 22 is disposed therein, one of the frames 20 is inserted into the fitting groove 23, and the frames are welded to each other while being pressed against each other by an ultrasonic welding machine.

At this time, the bead 24 melted by the ultrasonic welding flows into the escape groove 25, and almost no external force is applied to the diaphragm 22 due to the dissolution of the bead 24. To prevent.

FIG. 4 shows another embodiment of the present invention.
The taper 26, 26 is provided on the side wall of the relief groove 25, and the bead 24 melts at the time of ultrasonic welding, and a part of the bead 24 does not increase in flow velocity or turbulent flow when flowing out from the relief groove 25 to the diaphragm 22 part. In this manner, wrinkles of the diaphragm 22 due to the flow of the beads at the time of melting are further prevented.

FIG. 5 shows another embodiment of the present invention.
By making the cross-sectional shape of the escape groove 25 into a V-shape, the flow velocity at the time of melting the bead 24 at the time of ultrasonic welding is prevented from increasing or turbulent flow is generated, and wrinkles of the diaphragm 22 are generated due to these generations It is to prevent.

[0014]

According to the structure of the present invention, a relief groove is formed in the other frame opposite to the ultrasonic welding bead formed in one frame, so that the bead portion melted during the ultrasonic welding is released. It is possible to prevent the generation of wrinkles caused by flowing into the groove and flowing out of the bead portion to the diaphragm.

Also, according to the structure of the present invention, the taper is provided on the side wall of the escape groove, so that even if a part of the bead melted by the ultrasonic welding flows out of the escape groove, the taper increases the flow velocity at the time of the outflow. And turbulence can be suppressed as much as possible, and the generation of wrinkles on the diaphragm can be prevented.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the main part.

FIG. 3 is a side longitudinal sectional view of a main part of the same.

FIG. 4 is a side longitudinal sectional view showing another embodiment.

FIG. 5 is a side longitudinal sectional view showing another embodiment.

FIG. 6 is a side longitudinal sectional view showing a conventional example.

[Explanation of symbols]

 20 Frame 21 Frame 22 Diaphragm 24 Bead 25 Escape groove

Claims (2)

[Claims] 1. A method of ultrasonically welding a diaphragm between a pair of resin frames, wherein a mountain-shaped bead is integrally formed on one of the resin frames, and the other of the resin frames is opposed to the bead. A diaphragm for an ion water generator, wherein a relief groove is formed in a recess. 2. The diaphragm of the ion water generator according to claim 1, wherein a taper is provided on a side wall of the relief groove.