JPH0129715Y2 - - Google Patents

Description

[Detailed Description of the Invention] Field of the Invention This invention relates to a storage battery equipped with a handle made of a flexible member such as a string, and more specifically relates to a storage battery with an improved attachment structure for the handle. Regarding.

Description of the Prior Art Some storage batteries are equipped with a handle made of a flexible member, such as a string. This is to facilitate handling in cases where transportation is required. FIG. 1 is a partially cutaway side view showing an example of a conventional storage battery of this type. The storage battery consists of a battery case 1 and a handle 3 with both ends attached to the battery case 1. The handle 3 is made of a flexible member such as a string. By the way, the attachment structure of the handle 3 to the battery case 1 is as follows.

The battery case 1 includes a battery case body 1a and a battery case body 1a.
The lid body 1b is joined to the lid body 1b. This lid body 1b
Through holes 4 and 5 are formed in the upper surface of. Both ends of the handle 3 are fixed to the through holes 4 and 5. As is clear from FIG. 2, which shows an enlarged view of the attachment structure between the end of the handle 3 and the through hole 4, the end of the handle 3 is inserted into the through hole 4, and the battery case 1
extends inside. Inside the battery case 1, that is, inside the part of the wall surface of the lid 1b of the battery case 1 where the through hole 4 is formed, the tip of the handle 3 is tied, and this tied part 3a is connected to the through hole 4. has a diameter larger than the inner diameter of the Therefore, when lifting the battery case 1 with the handle 3, the tip of the handle 3, that is, the tied part 3a, is locked in the through hole 4, so the handle 3 cannot be removed from the battery case 1. do not have.

By the way, as is clear from FIG. 2, a cylindrical rib 7 is formed in the inner part of the through hole 4 so as to surround the tied part 3a at the tip of the handle 3. It is filled with resin 8. The resin 8 is filled in order to prevent the electrolytic solution inside the battery case from leaking from the through hole 4 .

Since the resin 8 plays the role described above, the lid 1b and the resin 8 must be made of a material that exhibits considerable adhesion to each other.
For this reason, the lid 1b is usually made of ABS resin with excellent adhesive properties. however,
Since ABS resin is relatively expensive, it is desirable to construct it from a cheaper material such as polypropylene. However, as is well known, polypropylene is a material with extremely low adhesiveness. . Therefore, if the battery case 1 is made of polypropylene, leakage of the electrolyte cannot be prevented. As a result, the current situation has been to use expensive ABS resin.

Purpose of the invention Therefore, the purpose of the invention is to provide an inexpensive storage battery that has a handle attached thereto, is free from the risk of electrolyte leakage.

Structure of the invention In summary, this invention consists of a resin battery case with a plurality of through holes formed in the wall surface, and a flexible member whose tip is attached through the through holes of the battery case. The tip of the handle inserted into the battery case through the through-hole is configured to have a relatively larger diameter than the inner diameter of the through-hole, so that the handle is A storage battery that is designed to prevent it from coming out through the through hole, and is characterized by a resin cap that covers the tip of the handle and the through hole welded to the inside of the part of the wall of the battery case where the through hole is formed. It is a storage battery.

Other features of this invention will become clear from the following description of embodiments with reference to the drawings.

DESCRIPTION OF EMBODIMENTS FIG. 3 is a partial sectional view for explaining an embodiment of this invention, and corresponds to FIG. 2 shown in the prior art. Also in this idea,
A through hole 14 is formed in the upper wall surface of the lid 1b of the battery case 1. A handle 13 made of a flexible member is inserted into the through hole 14.
The tip portion of is tied as shown in Fig. 3.
This knot has a diameter larger than the inner diameter of the through hole 14. Therefore, the handle 13 is
Even if the handle 13 is pulled in the direction of the through hole 14, the knot locks the handle 13 around the through hole 14.
It doesn't get any better than that.

By the way, the feature of the embodiment shown in FIG. 3 is that a cap 16 made of resin is welded to the wall surface of the lid 1b of the battery case 1 so as to cover the knot and the through hole 14. Therefore, the cap 16 reliably prevents electrolyte from leaking from the through hole 14. Moreover, cap 16 is battery case 1.
Since it is welded to the wall surface of the lid body 1b,
The battery case 1 including the lid 1b can be made of an inexpensive material such as polypropylene.

The cap 16 can be "welded" by various known welding methods such as spin welding, ultrasonic welding, and thermal welding, but spin welding is preferred from the viewpoint of workability.

FIG. 4 is a partial sectional view showing a second embodiment of this invention, and corresponds to FIG. 3. Fourth
A feature of the embodiment shown in the figure is that a cylindrical rib 17 is formed inside the wall surface 11c of the lid 1b of the battery case 1. The inner diameter of the cylindrical rib 17 is chosen to be approximately equal to the outer diameter of the cap 16. Therefore, the cap 16 has a wall surface 11c of the lid body 1b.
Not only is it in contact with the inner surface of the cylindrical rib 17,
Can be welded. In the embodiment shown in FIG. 4, the area of the welded portion is enlarged compared to the embodiment shown in FIG. 3, so that leakage of the electrolyte can be more reliably prevented. The rest of the structure is the same as that of the embodiment shown in FIG. 3, so a description thereof will be omitted.

FIG. 5 is a partial sectional view showing a third embodiment of this invention. Here, double cylindrical walls 18a and 18b arranged concentrically are formed on the wall surface 11c of the lid of the battery case 1. The cap 16 is inserted into an annular groove 19 provided between the double walls 18a, 18b. The annular groove 19 between the double walls 18a and 18b is formed to have a width approximately equal to the thickness of the cap 16. Therefore, when the cap 16 is inserted into the annular groove 19, the entire side surface of the cap 16 has double walls 18a, 18.
b. Therefore, in the embodiment shown in FIG.
Since the welding area is further expanded compared to each of the embodiments shown in the figures, leakage of the electrolyte can be more reliably prevented. Moreover, the cylindrical double wall 18
Since it has a structure in which the side surface of the cap 16 is inserted between a and 18b, it is also excellent in strength.

In each of the embodiments described above, all the handles 13 are attached to the upper wall surface of the battery case 1, that is, the upper surface of the lid body 1b, but the invention is not limited to this. For example, a through hole may be formed in the side wall of the battery case body 1a (see FIG. 1), and a handle may be attached thereto. In addition, the handle 13 can be attached to any position on the battery case as long as the handle 13 can function. Further, this invention is not limited to a handle having a pair of end parts, but can also be applied to a handle having more attachment parts. That is, both ends of the handle may be further divided into a plurality of parts, and each branched end may be inserted into a through hole and fixed,
Alternatively, the present invention may be applied to a structure in which two handles are respectively attached to a pair of through holes.

Furthermore, the handle 13 is not limited to the string, but can be made of various flexible members. Further, the portion that is locked in the through hole, that is, the portion that exists inside the battery case and has a larger diameter than the inside diameter of the through hole, does not need to be a knot as shown in the above embodiment, and the portion of the handle 13 It may have a ring or the like fixed to the tip, or it may have a larger diameter by hardening adhesive.

Effects of the invention As described above, this invention has a structure in which a resin cap covering the tip of the handle and the through-hole is welded to the inside of the part of the wall surface of the battery case where the through-hole is formed. Therefore, leakage of the electrolyte can be reliably prevented, and the battery case can be constructed of an inexpensive material such as polypropylene.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional side view showing an example of a conventional storage battery that led to this invention. Second
The figure is a partial sectional view showing an enlarged view of the main part of FIG. 1. FIG. 3 is a partial sectional view showing the first embodiment of this invention, and corresponds to FIG. 2.
FIG. 4 is a partial sectional view showing a second embodiment of this invention. FIG. 5 is a partial sectional view showing a third embodiment of this invention. 1...Battery container, 11c...Wall surface of battery container, 13...
Handle, 14...through hole, 16...resin cap.

Claims (1)

[Claims for Utility Model Registration] A handle made of a resin battery case with a plurality of through holes formed in the wall surface, and a flexible member whose tip is attached through the through holes of the battery case. and
The tip portion of the handle inserted into the battery case through the through-hole is configured to have a relatively larger diameter than the inner diameter of the through-hole, so that the handle does not come out of the through-hole. In the storage battery configured so as not to allow the battery to pass through, a resin cap that covers the tip of the handle and the through hole is welded to the portion of the wall surface of the battery case where the through hole is formed. Storage battery.