JP3577811B2 - Battery case lid mounting device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a battery case cover plate mounting device that hermetically mounts a battery case cover plate such as a distribution line switch control device mounted on an upper part of a power pole.
[0002]
[Prior art]
A conventional battery case cover plate mounting apparatus will be described with reference to FIGS. 2 and 3 which show an overall cut front view and a partially enlarged view of FIG. In these figures, reference numeral 1 denotes a housing of a distribution line switch control device or the like attached to an upper part of a power pole 2 by two mounting brackets 3, and 4 denotes a cover plate which hermetically closes a lower opening 5 of the housing 1. Reference numeral 6 denotes a through-hole formed in the center of the cover plate 4. Reference numeral 7 denotes a battery case, which is composed of a long upper cylinder 8 having a closed upper end and an open lower end, and a short lower cylindrical body 9.
[0003]
Reference numeral 10 denotes a flange at the lower end of the upper cylindrical body 8. The upper cylindrical body 8 is inserted through the through hole 6 from below, and the flange 10 is in contact with the lower surface of the cover plate 4. Reference numeral 11 denotes a flange at the upper end of the lower cylindrical body 9, in which an annular O-ring groove 12 is formed. Reference numeral 13 denotes an O-ring fitted into the O-ring groove 12, and reference numeral 14 denotes a screw that penetrates the flanges 11 and 10 and is screwed into a screw hole on the lower surface of the cover plate 4 so that the flanges 10 and 11 are airtightly mounted. The two cylindrical bodies 8 and 9 are mounted on the cover plate 4.
Reference numeral 15 denotes a battery housed in the case 7, reference numeral 16 denotes a fixing sponge provided on a peripheral surface of the battery 15, and reference numeral 17 denotes two battery connection terminals that airtightly penetrate the upper plate of the upper cylinder 8. 15 are connected to both terminals.
[0004]
18 is a male screw formed on the outer peripheral surface of the lower end of the lower cylindrical body 9, 19 is a disk-shaped cap, 20 is a concave portion on the upper portion of the cap 19, 21 is a screw formed on the side wall of the concave portion 20, The cap 19 closes the lower opening of the case 7 by screwing with the external thread 18 of the lower cylinder 9. Reference numeral 22 denotes a desiccant made of silica gel placed in the concave portion 20 of the cap 19, and reference numeral 23 denotes an annular O-ring groove formed in the peripheral portion of the bottom surface of the concave portion 20 and in which the O-ring 24 is fitted. When the cap 19 closes the lower opening of the lower cylinder 9 when tightened to the cylinder 9, the O-ring 24 is pressed against the lower end surface of the lower cylinder 9, and the cap 19 is airtightly attached to the lower cylinder 9. .
[0005]
Then, the replacement of the battery 15 based on the service life is performed by the operator by detaching the cap 19 from the case 7 on the utility pole 2.
[0006]
[Problems to be solved by the invention]
In the case of the above-mentioned conventional device, when the battery 15 is replaced, the moisture absorbent 22 may fall from the cap 19.
In addition, when the cap 19 is attached to the case 7, there is a problem that the moisture absorbent 22 gets caught between the lower end surface of the lower cylinder 9 and the O-ring surface.
Further, the airtight performance may be impaired depending on how the cap 19 is tightened.
[0007]
In addition, when the cap 19 is tightened, the O-ring 24 slides on the lower end surface of the lower tubular body 9 and frictional force is applied to the O-ring 24, thereby damaging the O-ring 24 and reducing the reliability of airtightness. There is.
[0008]
The present invention, in consideration of the above points, prevents the moisture absorbent from dropping due to the attachment and detachment of the cap, prevents the moisture absorbent from biting into the O-ring surface, and prevents the O-ring from being damaged. It is an object of the present invention to provide a lid device for a battery case, which can maintain airtightness and improve airtight reliability.
[0009]
[Means for Solving the Problems]
In order to solve the above problems, a battery case cover plate mounting apparatus according to the present invention includes a cylindrical battery case that has a closed upper end and an open lower end and accommodates a battery, and is screwed to an outer surface of a lower end portion of the case. The outer cap with the opening closed, the through-hole formed in the center of the outer cap, and the peripheral surface slidingly contacting the inner surface of the lower end of the case via an O-ring, and the bottom surface rotating on the upper surface of the outer cap. An inner cap freely slidably contacting, a protruding member protruding from a central portion of a lower surface of the inner cap and inserted through the through hole, and a retaining member provided at a tip end of the protruding member and having a diameter larger than the diameter of the through hole. And a hygroscopic agent placed in the recess at the top of the inner cap.
[0010]
Therefore, when attaching the outer cap to the battery case, the upper end of the inner cap is inserted into the lower opening of the case, and the outer cap is screwed into the outer surface of the lower end of the case. As a result, the inner cap is airtightly held by the inner cap irrespective of the strength of the outer cap, and the reliability of the airtightness is improved.
In addition, when the outer cap is detached, the inner cap does not rotate, thereby preventing the O-ring from being damaged.
[0011]
Furthermore, since the desiccant is stored in the recess of the inner cap, the desiccant does not protrude from the recess of the inner cap when the outer cap is attached and detached when replacing the battery. Biting between the cap and the O-ring surface is prevented.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
One embodiment of the present invention will be described with reference to FIG. 1 showing a cut front view. 2, the same reference numerals as those in FIGS. 2 and 3 denote the same or corresponding components.
Reference numeral 25 denotes an outer cap having substantially the same shape as the cap 19, and the female screw 21 on the side wall of the concave portion 20 is screwed to the external thread 18 of the lower cylinder 9. 26 is a through hole formed in the center of the outer cap 25, 27 is an annular O-ring groove formed in the inner peripheral surface of the lower portion of the lower cylindrical body 9 and fitted with an O-ring 28, and 29 is an inner cap. The bottom surface is rotatably slid on the upper surface of the outer cap 25. Reference numeral 30 denotes a concave portion on the upper portion of the inner cap 29.
[0013]
Reference numeral 31 denotes a protruding member provided at the center of the lower surface of the inner cap 29 and inserted through the through hole 26; 32, a screw hole formed on the lower surface of the protruding member 31; The retaining body 34 having a diameter larger than the diameter of the contact hole 26 is a screw threaded through the retaining body 33 and screwed into the screw hole 32. The inner cap 29 is connected to the outer cap 25 by a retaining member 33, the desiccant 22 is placed in the concave portion 30 of the inner cap 29, and the peripheral surface of the inner cap 29 is attached to the inner surface of the lower cylindrical body 9 by an O-ring. 28, it is slidingly contacted airtightly.
[0014]
When the battery 15 is replaced, when the outer cap 25 is removed from the case 7, at the same time, the lower surface of the outer cap 25 abuts on the retaining member 33, and the inner cap 29 slides on the inner surface of the lower cylinder 9 without rotating. The O-ring 28 descends while coming into contact with the lower cylindrical body 9 and is not damaged.
[0015]
Next, after replacing the battery 15, the upper end of the inner cap 29 is inserted into the lower opening of the lower cylinder 9, and the outer cap 25 is tightened to the lower cylinder 9. It rises while sliding in airtight manner via the ring 28, and airtightness is maintained by the inner cap 29 and the O-ring 28 irrespective of the strength of the outer cap 19 tightening.
[0016]
When the outer cap 25 is attached and detached when the battery 15 is replaced, the desiccant 22 does not protrude from the concave portion 30 of the inner cap 29, and the desiccant 22 drops and the gap between the inner cap 29 and the O-ring surface of the desiccant 22. Is prevented from biting.
[0017]
【The invention's effect】
The present invention has the following effects.
In the battery case cover plate mounting apparatus of the present invention, the protrusion 31 of the inner cap 29 is inserted into the through hole 26 at the center of the outer cap 25, and the peripheral surface of the inner cap 29 is , And the bottom surface of the inner cap 29 is slidably contacted with the upper surface of the outer cap 25. When the outer cap 25 is mounted on the case 7, the inner cap 29 is attached to the inner surface of the case 7 by an O-ring 28. Because of the airtight sliding contact, the airtightness is maintained by the inner cap 29 irrespective of the strength of the fastening of the outer cap 25, and the reliability of the airtightness can be improved.
[0018]
In addition, when the outer cap 25 is attached or detached, the inner cap 29 does not rotate, so that the O-ring 28 can be prevented from being damaged.
[0019]
Moreover, since the desiccant 22 is housed in the recess 30 of the inner cap 29, the desiccant 22 does not protrude from the recess 30 of the inner cap 29 when the outer cap 25 is detached when the battery 15 is replaced. It is possible to prevent the agent 22 from falling and the hygroscopic agent 22 from being caught between the inner cap 29 and the O-ring surface.
[Brief description of the drawings]
FIG. 1 is a cut-away front view of one embodiment of the present invention.
FIG. 2 is an overall cut front view of a conventional example.
FIG. 3 is an enlarged view of a part of FIG. 2;
[Explanation of symbols]
7 Battery Case 15 Battery 25 Outer Cap 26 Through Hole 28 O-Ring 29 Inner Cap 30 Recess 31 Projection

Claims (1)

A cylindrical battery case having a closed upper end and an open lower end, and containing a battery;
An outer cap screwed to an outer surface of a lower end portion of the case and closing the opening;
A through hole provided in the center of the outer cap,
An inner cap having a peripheral surface slidably contacting an inner surface of a lower end portion of the case via an O-ring and a bottom surface slidably contacting an upper surface of the outer cap;
A projecting body projecting from the center of the lower surface of the inner cap and inserted through the through hole;
A stopper provided at a tip end of the projecting body and having a diameter larger than the diameter of the through hole;
A lid mounting device for a battery case, comprising: a hygroscopic agent placed in a concave portion above the inner cap.

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