JPH089892Y2 - Sealed storage battery liquid stopper - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid port plug of a sealed storage battery.

[0002]

2. Description of the Related Art A liquid plug of a conventional sealed storage battery is provided with an exhaust plug which is screwed to a liquid cover of a battery case lid, and an adhesive or a desired heating means on the upper surface of the exhaust plug. It is composed of a fused plate-shaped cover.

[0003]

The sealed storage battery provided with the above-described liquid port plug is a so-called maintenance-free battery that does not require replenishing water when used, but the user often opens it in need of replenishing water in a timely manner. The liquid plug may be unscrewed by mistake with a type storage battery. 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 solution.

[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. The present invention provides a liquid outlet plug for a sealed storage battery, which can maintain good battery performance, and comprises an exhaust plug provided at the liquid mouth of a battery case lid and a cover provided on the upper surface of the exhaust plug. In the liquid outlet plug of the storage battery, the cover is rotatably provided on the exhaust plug.

[0005]

[Operation] In order for the user to unscrew the liquid stopper by mistake,
When twisting this, only the cover rotates and the exhaust plug body does not rotate, so that it is possible to prevent the liquid plug from coming off the liquid opening. In this case, by integrally molding the exhaust plug with the liquid port of the battery case lid, the exhaust plug can be manufactured separately, and an airtight attachment work to the liquid port can be omitted. Assembly of the liquid spout becomes easy and economical.
When a flange portion is provided on the outer peripheral surface of the upper portion of the exhaust plug body and a projection provided on the inner peripheral surface of the peripheral side wall of the cap-shaped cover is fitted to the flange portion, the cover to the exhaust plug body is Can be easily and quickly mounted, and the cover can be prevented from being detached from the exhaust plug body. On the other hand, since the cover is attached so as to be rotatable, it is possible to twist the liquid spout to detach it. It can be prevented.

[0006]

Embodiments of the present invention will now be described with reference to the accompanying drawings. FIG. 1 shows one embodiment of the present invention, and 1 shows a liquid spout plug of the present invention applied to a cylindrical liquid spout portion 3 provided on a battery case lid 2 of a sealed storage battery. The liquid mouth plug 1 has a thread on the outer periphery.
It is composed of an exhaust plug 4 having a 4a and a cover 5 rotatably attached to the exhaust plug. As shown in FIGS. 2 and 3, the cover 5 is formed in a cap shape, and a plurality of locking protrusions 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, has an exhaust hole 7 in the center thereof, and an elastic sealing valve body 8 is elastically covered on an upper portion 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. The exhaust plug 4 is screwed onto the portion 3a, and the cap-like cover 5 is attached to the exhaust plug 4.
, The locking projections 6 on the inner peripheral surface of the cylindrical peripheral side wall 5a are attached to the lower surface of the locking collar portion 9 of the exhaust plug body 4, and the liquid port plug 1 of the present invention is attached. Can be easily assembled. Thus, when the cover 5 is pulled upward, the projection 6 is maintained in the engagement state with the flange portion 9, and therefore the detachment from the exhaust plug body 4 is impossible, but the cover 5 is It 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 5a is made so as to have flexibility so that it can be opened outward when fitted to the exhaust plug body 4, 6 is shown in FIG.
As is clear from the above, it is preferable to form 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. 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 down on the peripheral side surface of the flange portion 9 of the exhaust plug body 4. And the horizontal step surface 6b is the collar portion 9
Due to its flexibility, it fits and engages the lower surface of the. Thus, from this state, the cap-shaped cover 5 cannot be pulled out upward, but can be rotated in the rotation direction.

[0008] Thus, the seal type storage battery provided with such a liquid spout 1, that is, a maintenance-free battery, should be twisted and removed by the user in order to erroneously replenish water. When twisting the liquid mouth plug 1, the cap-like cover 5
However, since the exhaust plug 4 does not rotate, it is possible to prevent the liquid port plug 1 from being removed.

As shown in FIG. 4, the flange 9 of the exhaust plug 4 is provided with a plurality of exhaust holes 10 on the circumference formed 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 body 4, pushes open the valve body 8 on its upper surface, and is discharged to the outside. , Passes through the gap 12 formed by the spacer projections 11, 11, ... And flows downward through the exhaust hole 10 provided in the collar portion 9 on the outer periphery of the gap 12 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 port plug 1 is previously formed integrally with the liquid port portion 3 when the battery case lid 2 is molded. It is a thing. Therefore, as in the above-described embodiment, the exhaust plug 4 having the screw 4a is separately provided.
It is possible to omit the troublesome work of producing the above and airtightly applying the same to the liquid port portion 3 through the packing 13 and simplify the constituent members. Also, by the rotation of the cover 5,
It is possible to completely eliminate the possibility that the exhaust plug 4 will rotate accordingly. Thus, the sealed storage battery provided with such a liquid port plug 1 can facilitate the manufacturing work and reduce the manufacturing cost.

[0011]

As described above, according to the present invention, the cover provided on the upper surface of the exhaust plug of the liquid port plug that closes the liquid port of the battery case lid of the storage battery is rotated with respect to the exhaust plug. Since it is designed to be applied freely, even if you accidentally try to unscrew the liquid stopper,
Since only the cover is rotated and the exhaust plug cannot be removed, it is possible to eliminate the above-mentioned adverse effects caused by accidentally removing the liquid port plug. In this case, the cover is formed into a cap shape, a locking projection is provided on the inner surface of the peripheral side wall, 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. Furthermore, according to the present invention,
When the exhaust plug body of the liquid mouth plug is integrally formed with the liquid mouth part of the battery case lid, the liquid mouth plug can be assembled more easily, the number of constituent members is small, the manufacturing is easy, and the cost is low. Bring a storage battery.

[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 to the exhaust plug. Seal type liquid spout plug for storage batteries that can be freely applied. 2. A locking collar portion projectingly provided on an upper outer peripheral surface 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.