JPS58161243A - Manufacturing method of filling plug for storage battery - Google Patents

Abstract

PURPOSE:To improve the prevention of leakage and productivity by integrating a cylindrical section whose top is closed and whose bottom is opened, with partition plates by which a number of chambers are partitioned, thermally/deforming these partition plates, so as to form spiral type curved narrow paths. CONSTITUTION:The mainframe 7 of filling plug made of a thermoplastic resin material, such as polyethylene or polypropylene is formed into a top-closed cylindrical shape. The closed top 8 is provided with a gas vent 9 and the bottom is opened. Besides, a screw 11 screwed in a container that is not illustrated is provided on the external surface of the bottom of the cylindrical section 10. Partition plates 12 that are arranged parallel to the axial direction of the cylindrical section 10 so as to partition the inside of the cylindrical section 10 into a number of chambers are provided inside the cylindrical section 10 in a body. These partition plates 12 permit their lower end edges to be thermally deformed nonlinearly most exceedingly and paths 13 between the bottom and the gas vent 9 on the top 8 to be curved narrowly in a spiral form. As a result, a filling plug for a storage bottom with excellent prevention of leakag and productivity can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a liquid spout plug for a storage battery that is excellent in hot liquid resistance and productivity.

Generally, gas is generated inside a storage battery when it is charged. Therefore, in order to prevent explosion due to increase in gas pressure, a gas escape hole is formed in the liquid port plug. By the way, when a storage battery is subjected to vibration or shock, the internal electrolytic solution leaks to the outside through the gas escape hole and corrodes external equipment. Various liquid prevention measures can be taken. However, liquid spout plugs equipped with hot liquid prevention means generally have an increased number of component parts, and also have complicated molding, resulting in poor productivity.

Figures 4a, b, and c and Figures 5a, b, and c are views showing conventional storage battery liquid spout plugs. In the one shown in FIG. 4, two splash-proof pieces 2 are provided protruding from the inner wall of the liquid spout body 1 to form a zigzag-shaped passage 3, and the electrolyte is prevented from reaching the gas escape hole 4. Although the splash pieces 2 provide resistance, it is difficult to simply form two splash-proof pieces 2 on the opposing inner walls of the liquid spout body 1 in terms of molding. Therefore, in this device, the member 5 provided with the gas escape hole 4 is formed separately from the liquid spout body 1 and is fitted into the liquid spout body 1, resulting in poor productivity. . Moreover, the structure shown in FIG. 6 has a structure in which the splash-proof plate 6 is assembled inside the liquid spout body 1, and the number of constituent members is three, which similarly has poor productivity.

The present invention solves the above-mentioned conventional drawbacks by thermally deforming a small number of components to form a spiral concave narrow passage,
The purpose of the present invention is to provide a liquid spout plug for a storage battery that has excellent liquid leakage prevention properties and productivity.

In order to achieve the above object, the present invention has a cylindrical part with a closed top and an open bottom, and a partition plate made of polyethylene, polypropylene, etc. that is parallel to the axial direction of the cylindrical part and partitions the cylindrical part into a plurality of chambers. A heated pin is inserted into each chamber, which is integrally formed from thermoplastic resin material and partitioned by a partition plate, and when the pin is pulled out, a twist is applied to deform the partition plate, and the tube is closed from the bottom of the cylindrical part. It is characterized by the formation of a spiral concave narrow path leading to the gas escape hole at the top.

Embodiments of the present invention will be described below with reference to FIGS. 1, 2, and 3.

In the figure, 7 is a liquid spout body, which is made of a thermoplastic resin material such as polyethylene or polypropylene. The liquid spout main body 7 is formed into a cylindrical shape with a closed top, has a gas escape hole 9 in the closed top 8, is open at the bottom, and has a battery container (not shown) on the outer periphery of the bottom of the cylindrical portion 1o. ). Inside the cylindrical portion 10, a partition plate 12 parallel to the axial direction of the cylindrical portion is integrally provided to partition the cylindrical portion into a plurality of chambers. As shown in FIG. 2, the lower edge of the partition plate 12 is most significantly thermally deformed into a non-linear shape, and the passage 13 from the lower part to the gas release hole 9 at the top is formed into a narrow spiral concave curve. ing.

Thermal deformation of the partition plate 12 is performed using a jig 14 shown in FIG. That is, this jig 14 has a plurality of pins 15 according to the number of chambers partitioned by the partition plate 12, and after the jig 14 is heated in advance to a temperature around the melting point of the resin material, the pins 15 are inserted into the cylindrical part 10. By inserting it into each chamber of the partition plate 12 and applying rotation (twisting) when pulling it out,
is thermally deformed, and a narrow passage 13 having the spirally turned φ is formed.

The liquid outlet plug for a storage battery manufactured by the manufacturing method of the present invention is constructed as described above, and is capable of escaping the required gas, and the partition plate is thermally deformed to reach the gas escape hole above the lower opening. The passage is spirally turned and narrow. Therefore, the electrolytic solution that tends to leak out together with the gas becomes difficult to reach the gas escape hole. In addition, this liquid spout is made of one component, so-called one piece, and the partition plate pre-formed on the cylindrical part is parallel to the axial direction of the cylindrical part, so the liquid spout can be used as a whole due to the cutting die etc. The molding is extremely simple and the productivity is good.

[Brief explanation of the drawing]

FIGS. 1a, b, and c are a top view, a cross-sectional view, and a bottom view showing the state before completion of a liquid outlet plug for a storage battery according to an embodiment of the present invention,
Figure 2 is a bottom view of the completed liquid outlet plug, Figure 3 is a jig for thermally deforming the partition plate, Figure 4 is a', b,
'c and FIGS. 5a, b, and 'c are a top view, a sectional view, and a bottom view of a conventional liquid spout plug for a storage battery. Completion...Liquid port plug body, 8...Closed top, 9...Gas escape hole, 1o...Cylindrical part, 12... Partition board, 13...Aisle. Name of agent: Patent attorney Toshio Nakao and 1 other person 1st
Figure ω, Figure 2, Figure 3, Figure 4, Figure 5, Procedural amendment (method), 1. Indication of the case, 1986 Patent Application No. 221456. 2. Name of the invention, Method for manufacturing fluid spout plugs for storage batteries. 3. Person making the amendment. Relationship to incident Patent application
Appointment Address: Bold 1006 Kadoma, Kadoma City, Osaka Prefecture
Name (582) Matsushita Electric Industrial Co., Ltd. Representative Toshihiko Yamashita 4 Agent 571 Address 1006 Oaza Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. Date of 5th Amendment Order March 29, 1980 - 6th Amendment Column 2 of the title of the invention in the subject Meikaku Book 1 2 -, -:' 7. The contents of the amendment will be amended.

Claims (1)

[Claims] A cylindrical part with a closed top and an open bottom, and a partition plate that is parallel to the axial direction of this cylindrical part and partitions it into a plurality of chambers are integrally formed from a thermoplastic resin material such as polyethylene or polypropylene, and a gas escape hole is provided in the closed top part.A heated pin is inserted into each chamber partitioned by the partition plate into the liquid outlet plug body, and the partition plate is deformed by twisting when the pin is pulled out. A method for producing a liquid spout plug for a storage battery, characterized in that the passage extending from the lower part to the upper part is a narrow spiral concave passage.