JPH0644019U - Sealed storage battery liquid stopper - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent accidental removal of the liquid port plug of a sealed battery. [Structure] A liquid outlet plug 1 of a sealed storage battery, which is formed by rotatably providing a cover 5 on an upper surface of an exhaust plug 4 provided at a liquid outlet 3 of a battery case lid 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a liquid stopper of a sealed storage battery.

[0002]

[Prior art]

 The liquid plug of the conventional sealed type storage battery is an exhaust plug that is screwed to the liquid cover of the battery case lid, and a plate fused to the upper surface of the exhaust plug with an adhesive or a desired heating means. It is composed of a cover.

[0003]

[Problems to be solved by the device]

 Although the sealed storage battery equipped with the above-mentioned liquid port plug is a so-called maintenance-free battery that does not require replenishing water when used, users often mistakenly think that it is an open type storage battery that requires replenishing water in a timely manner. The plug may be untwisted. As a result, the airtightness is broken, but on the other hand, there are disadvantages such as deterioration of battery performance and shortening of life due to a decrease in electrolyte.

[0004]

[Means for Solving the Problems]

 The present invention prevents the above-mentioned inadvertent opening when using, prevents the opening even if the liquid mouth plug is twisted, and keeps the storage battery sealed at all times to maintain good battery performance. (EN) A liquid-type plug for a storage battery, comprising: an exhaust plug provided at a liquid port of a battery case lid; and a cover provided on an upper surface of the exhaust plug. A cover is rotatably provided on the exhaust plug.

[0005]

[Action]

 When the user mistakenly twists the liquid stopper to unscrew it, only the cover rotates and the exhaust plug body does not rotate. It can be prevented from coming off the mouth. In this case, by integrally molding the exhaust plug with the liquid port of the battery case lid, the exhaust gas plug can be manufactured separately, and an airtight attachment work to the liquid port can be omitted. The assembly of the liquid spout becomes easy and economical. When the flange portion is provided on the outer peripheral surface of the upper portion of the exhaust plug body and the projection provided on the inner peripheral surface of the peripheral side wall of the cap-shaped cover is fitted on the flange portion, The cover can be attached easily and quickly, and the cover can be prevented from being detached from the exhaust plug body. On the other hand, since the cover can be attached so as to be rotatable, it can be detached by twisting the liquid port plug. Can be prevented.

[0006]

【Example】

 Next, an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows an embodiment of the present invention, and 1 shows a liquid port plug of the present invention which is applied to a cylindrical liquid port portion 3 provided on a battery case lid 2 of a sealed storage battery. The liquid mouth plug 1 is composed of an exhaust plug body 4 having a thread 4a on the outer periphery thereof and a cover 5 rotatably provided on the exhaust plug body 4. As is apparent from FIGS. 2 and 3, the cover 5 is formed in a cap shape, and a plurality of locking projections 6 are arranged on the inner peripheral surface of the cylindrical peripheral side wall 5a on the circumference thereof. did. On the other hand, the exhaust plug body 4 is a circumferential cylindrical body having an exhaust hole 7 in the center thereof, and an elastic sealing valve body 8 is elastically covered on an upper part of a cylindrical portion surrounding the exhaust hole 7. The exhaust hole 7 was normally closed. In the drawing, 7a is an exhaust notch provided at the upper end of the cylindrical portion surrounding the exhaust hole 7. According to the present invention, the locking collar 9 that projects annularly is provided on the outer peripheral surface of the upper portion. Thus, in manufacturing a sealed storage battery, a predetermined amount of electrolytic solution is injected through the liquid port portion 3 of the battery case lid 2 and then charged, and then a screw thread is formed on the upper inner peripheral surface of the liquid port portion 3. When the exhaust plug 4 is screwed to the portion 3a and the cap-shaped cover 5 is fitted to the exhaust plug 4, the locking projection 6 on the inner peripheral surface of the cylindrical peripheral side wall 5a is The liquid spout 1 of the present invention is easily assembled by being attached to the lower surface of the locking collar 9 of the exhaust plug 4. Thus, when the cover 5 is pulled upward, the projection 6 is maintained in the engagement state with the flange portion 9 and cannot be detached from the exhaust plug body 4, but the cover 5 cannot be removed. , Can be freely rotated along the outer peripheral surface of the exhaust plug 4.

The cap-shaped cover 5 is made of synthetic resin, and its peripheral side wall 5 a is made so as to have flexibility such that it can be opened outward when fitted to the exhaust plug body 4. As shown in FIG. 3, the reference numeral 6 may be formed in a triangular cross section composed of an inclined surface 6a inclined downward and a locking horizontal step surface 6b that abuts the lower surface of the collar portion 9 of the exhaust plug body 4. preferable. Thus, when the cap-shaped cover 5 is press-fitted to the exhaust plug body 4, the downwardly inclined surface 6a of the projection 6 smoothly slides downward on the peripheral side surface of the flange portion 9 of the exhaust plug body 4. Further, the horizontal step surface 6b is fitted and engaged with the lower surface of the collar portion 9 due to its flexibility. Thus, from this state, the cap-shaped cover 5 cannot be pulled out upward, but it can be rotated in the rotating direction.

[0008] Thus, the sealed type storage battery provided with such a liquid stopper 1, that is, the maintenance-free battery, should be twisted and removed by the user in order to accidentally replenish water. When the liquid mouth plug 1 is twisted, only the cap-shaped cover 5 rotates, but the exhaust plug 4 does not rotate, so that removal of the liquid mouth plug 1 can be prevented. .

As shown in FIG. 4, the flange portion 9 of the exhaust plug 4 is provided with a plurality of exhaust holes 10 on the circumference by notches from the outer peripheral edge thereof, and is provided on the upper surface thereof. It is preferable to dispose a plurality of space projections 11 on the lower surface of the top wall of the cap-shaped cover 5. As a result, when a gas pressure higher than a predetermined pressure is generated inside the storage battery, the excess gas passes through the exhaust hole 7 of the exhaust plug 4, pushes open the valve body 8 on the upper surface thereof, and is discharged to the outside. , Through the gap 12 formed by the spacer projections 11, 11, ..., And downwardly flows through the exhaust hole 10 provided in the collar portion 9 on the outer periphery thereof to be discharged to the outside. After the pressure drops, the safety valve 8 closes the exhaust hole 7 again. In the drawing, 13 indicates an annular rubber packing.

FIG. 5 shows another embodiment of the present invention, in which the exhaust plug body 4 of the liquid mouth plug 1 is previously formed integrally with the liquid mouth portion 3 when the battery case lid 2 is formed. It is a thing. Therefore, it is possible to omit the cumbersome work of separately manufacturing the exhaust plug 4 having the thread 4a and airtightly applying the exhaust plug 4 to the liquid port 3 through the packing 13 as in the above-described embodiment, and the structure can be omitted. The components can be simplified. Further, by rotating the cover 5, it is possible to completely eliminate the possibility that the exhaust plug 4 will rotate together with the exhaust plug 4. Thus, the sealed storage battery provided with such a liquid port plug 1 can facilitate the manufacturing work and reduce the manufacturing cost.

[0011]

[Effect of device]

 As described above, according to the present invention, the cover provided on the upper surface of the exhaust plug body of the liquid port plug that closes the liquid port portion of the battery case lid of the storage battery is rotatably provided with respect to the exhaust plug body. Therefore, even if one tries to unscrew the liquid stopper by mistake, only the cover rotates and the exhaust plug cannot be removed, so it was a good time to remove the liquid stopper by mistake. The harmful effect can be eliminated in advance. In this case, the cover is cap-shaped, and a locking projection is provided on the inner surface of the peripheral side wall of the cover, and the projection is fitted and locked to the flange portion provided on the upper outer peripheral surface of the exhaust plug body. In this case, it is possible to easily assemble the liquid stopper, and it is possible to prevent the liquid stopper from being twisted and removed. Further, according to the present invention, when the exhaust plug body of the liquid mouth plug is formed integrally with the liquid mouth portion of the battery case lid, the assembly of the liquid mouth plug can be further simplified, and the number of components can be reduced. An easy and cheap storage battery with a liquid spout is provided.

[Brief description of drawings]

FIG. 1 is a cut side view of a main part of a storage battery having a liquid port stopper according to an embodiment of the present invention.

FIG. 2 is a rear view of the cover.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a top view of an exhaust plug.

FIG. 5 is a cut side view of a main part of a storage battery including a liquid port stopper of another embodiment.

[Explanation of symbols]

1 Liquid mouth plug 2 Battery case lid 3
Liquid port 4 Exhaust plug 5 Cover, cap-like cover 6
Locking protrusion 9 Locking collar

Claims (3)

[Scope of utility model registration request] 1. A liquid outlet plug of a storage battery comprising an exhaust plug provided at a liquid opening of a battery case lid and a cover provided on an upper surface of the exhaust plug, wherein the cover is pivoted on the exhaust plug. Seal type liquid spout plug for storage batteries that can be freely applied. 2. A locking collar portion projecting from an outer peripheral surface of an upper portion of the exhaust plug body, and a cap-shaped cover formed on the collar portion on an inner peripheral surface of a peripheral side wall thereof. 2. The liquid port plug for a sealed storage battery according to claim 1, which is rotatably fitted through a protrusion. 3. The liquid plug of a sealed storage battery according to claim 1, wherein the exhaust plug is integrally formed with the liquid opening of the battery case lid.