JPH0451419Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a molded body with an opening recess for placing a lid in a storage battery.

[Conventional technology]

In a conventional storage battery, as a battery lid provided on the top surface of the battery case, as shown in FIGS. 6 and 7, the battery lid has an opening for placing a lid plate that surrounds a space opening on the top surface. There is a type in which a concave portion B is formed, a peripheral portion of a cover plate is placed on the upper surface of the concave portion, and the internal space thereof is used as an exhaust chamber. That is, in more detail,
The opening recess B for placing the lid plate has an opening circumferential wall D surrounding a space opening on the top surface of the battery lid and an inner surface thereof.
It is constituted by a receiving step wall d that is shorter than the opening peripheral wall D and is integrally formed with this. The upper surface of the opening of the internal space surrounded by the opening recess B for lid placement is a flat plate-shaped lid C shown by imaginary lines, which is placed on the upper end surface of the receiving wall d to cover the internal space. The battery cover A has a flat top surface and is covered with the battery lid A. In this case, the peripheral edge of the lid C is placed on the upper end surface of the receiving wall d, and in this state, the peripheral edge is placed on the upper end surface of the receiving wall d using ultrasonic waves, and a part of it is fitted with an exhaust gas. Leave the welded part and fix it by welding, and use the internal space as an exhaust chamber.
It is configured to exhaust the gas in the exhaust chamber to the outside from the non-welded portion. E indicates an exhaust pipe that penetrates the horizontal base wall a forming the bottom surface of the exhaust chamber and communicates the inside of the cell chamber with the exhaust chamber, and the upper surface of the exhaust pipe is usually covered with an elastic valve body.

[The problem that the idea attempts to solve]

The conventional storage battery lid A is made by molding, and during the molding, the opening recess B for placing the lid is formed between the opening peripheral wall D and the receiving step wall d, which is shorter than this, as described above. When configured by integral molding, the integrally molded wall is formed with a notch step portion for receiving the lid, so that its upper end wall portion is formed into a thin wall portion consisting only of the upper end edge of the opening peripheral wall D, The lower wall portion is formed of a wall formed integrally with the opening peripheral wall D and the receiving step wall d, so that it is formed into a thick wall portion and has a different thickness as a whole. The opening recess for lid placement, which is made of integrally molded walls having different thicknesses, often produces molding sink marks on the outer surface of the thick wall, resulting in manufacturing loss and a decrease in commercial value. Further, when the cover plate C is placed on the upper end surface of the receiving step wall d, it is necessary to weld the cover plate C with consideration to leaving the unwelded portion, which is troublesome.

[Means to solve the problem]

The present invention solves the inconvenience of the conventional opening recess for placing the lid on the storage battery lid of the above type, and is not only applicable to the above-mentioned battery lid on which the lid plate is placed.
The present invention provides a molded body having a lid placement opening recess that can be applied to the top opening of a battery case on which a battery lid is placed, and includes an opening peripheral wall surrounding a space opening on the top surface of the battery lid or battery case; In the internal space of the opening peripheral wall,
Separately from the opening circumferential wall, the lid mounting opening recess is formed by a receiving step wall that stands upright from the horizontal base wall at a distance from the inner surface of the opening circumferential wall and is shorter than the opening circumferential wall.

[Effect]

The above-described opening recess for placing a lid of the present invention is composed of the opening surrounding wall and a receiving step wall that stands upright from the horizontal base wall at a distance apart from the inner surface of the opening surrounding wall. Therefore, when a battery cover or a battery case is molded, the opening peripheral wall of the opening recess for placing the lid is molded to the same thickness up to the upper end, so the lid has an opening peripheral wall with no molding sink on its outer surface. A molded body of a battery lid or a battery case having a mounting opening recess is obtained. Further, when the receiving stage walls are arranged discontinuously, even if all the upper end surfaces of the receiving stage walls are welded, exhaust can be exhausted from the gap between the receiving stage walls and the opening peripheral wall.

〔Example〕

1 to 3 show an example of the implementation of the present invention,
Reference numeral 1 indicates an exhaust-type housing-shaped battery lid molded body applied to a rectangular storage battery case, and an exhaust chamber is formed in the central region of the upper surface of the lid 1 by surrounding a space opening on the upper surface. In addition, a lid placement opening recess 2 of the present invention, which will be described later, is configured in which a lid plate is fitted and placed in the upper opening. The bottom surface of the exhaust chamber has a horizontal base wall 1a, and on the left and right sides of the horizontal base wall 1a are exhaust pipes that penetrate the horizontal base wall 1a and communicate the exhaust chamber with the left and right cell chambers below the horizontal base wall 1a. 3, 3, and thus the exhaust gas from the cell chamber flows into the exhaust chamber, which acts as an exhaust chamber where the gas is temporarily retained. The upper end of the exhaust pipe 3 is covered with an elastic cap-shaped valve (not shown), which is normally closed. Opening recess 2 for mounting according to the present invention
is constructed as follows. That is, the opening peripheral wall 2a surrounding the exhaust chamber and the opening peripheral wall 2a are separated from each other by a distance 4 separated from the inner surface of the opening peripheral wall 2a.
and a receiving step wall 2b that stands upright from the horizontal base wall 1a and is shorter than the opening peripheral wall 2a. The receiving step wall 2b has a height lower than the opening peripheral wall 2a by the thickness of the flat plate cover applied to its upper end. Incidentally, the receiving step wall 2b includes a plurality of pieces along the opening peripheral wall 2a,
A certain amount of space 6 is present and the space is discontinuously arranged.

In this way, when the opening peripheral wall 2a and the receiving step wall 2b that constitute the opening recess 2 for lid placement are arranged separately from each other, the opening recess 2 for lid placement is formed when forming the battery lid. When this is done, an opening recess 2 for lid placement consisting of the opening peripheral wall 2a and the receiving step wall 2b with no molding sinkage is obtained. On the upper surface of the opening recess 2 of the lid 1, as shown by the imaginary line in FIG. 3, a flat lid 5 is fitted onto the inner peripheral surface of the opening peripheral wall 2a.
The peripheral edge part is placed on the upper end surface of all the discontinuous receiving stage walls 2b, and the lid 5 and all the receiving stage walls 2
Even if they are thermally welded to each other by ultrasonic waves, the lid 5 covers the upper surface of the exhaust chamber while being fixed to the receiving stage wall 2b, but the gas flowing into the exhaust chamber from the exhaust pipe 3 does not flow into the receiving part. Since it is allowed to freely flow through the space 6 between 2b and the interval 4 and discharge to the outside through the gap between the peripheral edge of the lid 5 and the inner peripheral edge of the opening peripheral wall 2a, it is possible to When applying it to the top end surface, there is no need to consider making it partially non-welded.
Further, it is possible to eliminate the need to previously process and form exhaust holes and exhaust grooves on the upper end surface. In addition, step wall 2
b may be an annular receiving wall 2b extending over the entire inner circumferential surface of the opening peripheral wall 2a, but in this case, when the lid 5 and this annular receiving wall 2b are welded, the annular receiving wall 2b Consideration must be given to leaving part of the upper end surface of 2b in the non-welded area. Further, the opening peripheral wall 2a surrounds the entire peripheral edge of the lid 5, and thus serves to protect the lid 5 from contact with the outside world.

4 and 5 show an example in which the present invention is applied to a sealed storage battery case 1. In this embodiment, the case 1 has openings for placing the lid of the present invention on the upper surface of three cell chambers. The recess 2 is configured as follows. That is, an opening peripheral wall 2a consisting of a battery case peripheral wall surrounding the upper opening space of each cell chamber of the battery case, and a space 4 spaced apart from the inner surface of the opening peripheral wall 2a in the internal space thereof. The opening surrounding wall 2a stands upright from the horizontal base wall 1a extending horizontally from the inner surface of the opening surrounding wall 2a.
An opening recess 2 for placing a battery lid is formed by a receiving stage wall 2b which is shorter than a. In this embodiment, the receiving step wall 2b is an annular receiving step wall extending along the opening peripheral wall 2a. Further, the receiving step wall 2b had the same thickness as the opening peripheral wall 2a. Therefore, in molding the battery case, the opening peripheral wall 2a and the receiving step wall 2b are molded to form the opening recess 2 for lid placement, which is formed by protruding independently from each other with an interval of 4. if,
Similar to the previous embodiment, no molding sink occurs in any of the molded walls of the opening peripheral wall 2a and the receiving step wall 2b that constitute the lid placement opening in the molding.
Therefore, a good battery case molded product can be obtained. Thus, in the lid placement opening recess 2 at the top of the battery case,
A cap-shaped battery lid 5 is fitted onto the inner surface of the opening peripheral wall 2b, and its peripheral edge is placed on the upper end surface of the annular receiving wall 2b, and the annular receiving stage 2b is closed using ultrasonic waves, heat sheets, etc. The entire periphery of the lid 5 is surrounded and protected by the opening peripheral wall 2a.

[Effect of idea]

As described above, according to the present invention, as a molded body of a battery lid or a battery case having an opening recess for placing the lid, an opening peripheral wall surrounding a space opened on the upper surface, and an opening in the internal space of the opening peripheral wall are provided. Separately from the opening surrounding wall, the opening recess for placing the lid is formed by a receiving step wall that stands upright from the horizontal base wall at a distance from the inner surface thereof and is shorter than the opening surrounding wall, so that the opening recess for placing the lid is formed. It is possible to mold a molded product having an opening peripheral wall without sink marks, and a good molded product can be obtained without product loss.

In addition, if the receiving step wall is disposed on a plurality of discontinuous receiving steps walls as necessary, even if the lid is welded to the entire upper end surface of these receiving steps, the lid and the opening peripheral wall around the outer periphery may Since the battery lid can be configured to allow exhaust air from between the battery lid and the opening, there is no need for the troublesome welding work of welding between the lid and the upper end surface of the opening peripheral wall, taking into account the non-welded part for exhaust air. , it is possible to manufacture a battery lid with a lid that is easy to manufacture.

[Brief explanation of the drawing]

FIG. 1 is a top view of the battery cover of an example of the implementation of the present invention, FIG. 2 is a cross-sectional view taken along the line -- in FIG. 1, FIG. 3 is a cross-sectional view taken along the line -- in FIG. 1, and FIG. 5 is a top view of the battery cover of another embodiment, FIG. 5 is a cross-sectional view taken along the line -- in FIG. 4, FIG.
The figure shows a sectional view taken along the line -- in FIG. 1...Battery lid molded body, battery case molded body, 1a...
Horizontal base wall, 2... Opening recess for lid placement, 2a... Opening peripheral wall, 2b... Step wall, 4... Interval, 5... Plate-shaped lid, cap-shaped lid.

Claims (1)

[Scope of utility model registration request] An opening peripheral wall surrounding a space opening on the top surface of the battery lid or battery case, and a space provided within the internal space of the opening peripheral wall, separate from the opening peripheral wall, from the horizontal base wall at a distance from the inner surface thereof. A molded article having an opening recess for placing a lid in a storage battery, the opening recess for placing the lid comprising a receiving step wall that stands upright and is shorter than the peripheral wall of the opening.