JP6197189B2 - Circular louver device for electrical equipment storage box - Google Patents

Description

  The present invention relates to a circular louver device for electrical equipment storage boxes.

  In an electric equipment storage box installed outdoors, a ventilation opening formed in a casing is generally covered with a louver to prevent rainwater from entering the casing.

  As a louver mounting structure, a cylindrical part fitted into the opening is formed in the louver body, and in a state where this cylindrical part is fitted into the opening, a ring-like portion is formed on the screw part formed on the outer peripheral surface of the cylindrical part. A structure (for example, Patent Document 1) in which a fastening screw is screwed and fixed to a housing is widely adopted.

  Since the louver blocks the intrusion of rainwater at the angle of the slats, in order to achieve a desired waterproof function, it is essential to fit the louver body into the opening at an appropriate angle. In particular, in the case of a circular louver (a type in which a cylindrical part having the same shape as that of the opening is fitted in a circular opening), it may take time to align the fitting angle, and tightening screws after fitting. When screwing, there is a problem that the tube portion is rotated and the fitting angle is likely to be displaced.

Japanese Utility Model Publication No. 6-31197

  An object of the present invention is to solve the above-mentioned problems, easily align the fitting angle, and prevent the fitting angle from shifting when the tightening screw is screwed after fitting. Is to provide.

The circular louver device for an electric equipment storage box of the present invention made to solve the above-mentioned problems is a cylindrical portion having a circular inner peripheral surface that is fitted into a ventilation opening formed in a housing of the electric equipment storage box. And a louver main body provided with a slat covering the opening, and a tightening screw for fixing the louver main body to the housing by screwing with a screw portion formed on the outer peripheral surface of the cylindrical portion. A circular louver device for an electrical equipment storage box, which defines a fitting position of the cylindrical portion into the opening, and as a means for preventing rotational movement from the fitting position when a fastening screw is fastened, it is characterized in that it has a plurality of outer cutout portions of the threaded portion of the outer peripheral surface has notched over the longitudinal direction of the cylindrical portion.

  According to a second aspect of the present invention, in the circular louver device for an electric equipment storage box according to the first aspect, an outer straight portion in which an outer peripheral surface of the cylindrical portion is cut out linearly is formed as the outer notch portion. It is a feature.

  As in the present invention, the fitting position of the cylindrical portion to be fitted into the opening for ventilation formed in the housing of the electrical equipment storage box is defined, and the fitting position is set when the fastening screw is fastened. As a means for preventing rotational movement from the outer peripheral surface of the cylindrical portion, the outer peripheral surface of the cylindrical portion has an outer notch portion that is notched in the front-rear direction, thereby facilitating alignment of the fitting angle and fitting. The displacement of the fitting angle when the tightening screw is screwed later can be prevented.

  According to a second aspect of the present invention, by forming an outer straight portion in which the outer peripheral surface of the cylindrical portion is notched linearly over the entire front-rear direction as the outer notched portion, the ventilation space in the cylindrical portion is formed. The above-described effects can be achieved without narrowing.

Anti-rotation effect of the, the place becomes stronger in proportion to the length of the outer straight portion, by securing to Rukoto the total length of the outer straight portion as a front having a plurality of Kisotogawa straight portion, the effect It can be more powerful.

It is a disassembled perspective view of the circular louver of Embodiment 1. It is a front view of the cylindrical part of the circular louver of Embodiment 1. It is a front view of the opening part for ventilation formed in the housing | casing. It is a cylindrical part front view of the circular louver of other embodiment. It is a cylindrical part front view of the circular louver of Embodiment 2. It is a cylindrical part front view of the circular louver of Embodiment 3.

  Preferred embodiments of the present invention are shown below.

(Embodiment 1)
As shown in FIG. 1, the circular louver of the present embodiment includes an outer louver 3 having an outer blade portion 2 inclined upward toward the housing 1 side of the electrical equipment storage box, and the housing 1 side. It has a double waterproof structure composed of a louver body 5 having an inner blade portion 4 that is inclined downward.

  The louver body 5 includes a cylindrical portion 7 fitted from the outside of the housing 1 into a ventilation opening 6 formed in the housing 1, and a screw portion 8 formed on the outer peripheral surface of the cylindrical portion 7. In a state where the portion 7 is fitted in the opening 6, a ring-shaped fastening screw 9 is screwed into the screw portion 8 and is fixed to the housing 1. Note that the louver may not be a two-member configuration of the outer louver and the louver body 5, and both the outer blade portion 2 and the inner blade portion 4 may be formed on the louver body, or only the outer blade portion 2 may be formed.

  As shown in FIGS. 1 and 2, three outer straight portions 11 are formed on the outer peripheral surface 10 of the cylindrical portion 7 by linearly cutting the outer peripheral surface 10 in the front-rear direction (the arrow direction in FIG. 1). doing. As shown in FIG. 3, the cylindrical portion 7 is opened at the opening 6 of the housing 1 by forming a straight side that is a notched side 16 at a position corresponding to the outer straight portion 11. Since the fitting angle at the time of fitting in 6 is uniquely determined, positioning can be performed reliably and easily. Moreover, in the said structure, since the rotation of the cylindrical part 7 in the state which fitted the cylindrical part 7 in the opening part 6 is controlled, the shift | offset | difference of the fitting angle at the time of screwing the fastening screw 9 is avoided reliably. be able to.

  In the present embodiment, as shown in FIG. 2, the outer straight portion 11 is formed without deforming the inner peripheral shape of the cylindrical portion 7, that is, without narrowing the ventilation space in the cylindrical portion 7. The effect can be achieved while maintaining the ventilation efficiency.

  The effect of restricting the rotation of the cylindrical portion 7 becomes stronger in proportion to the length of the outer straight portion 11, but it is assumed that the outer straight portion 11 is formed without narrowing the ventilation space in the cylindrical portion 7. Then, the length of each outer straight portion 11 is limited to a range where the thickness 12 of the cylindrical portion 7 remains, and cannot be a length greater than a predetermined value. Therefore, in the present embodiment, the above-described effect is further strengthened by forming the outer straight portions at three locations and ensuring the total length of the outer straight portions.

  Although the formation place of the outer side straight part 11 is not specifically limited, as shown in FIG. 2, the outer side straight part 11 is formed in the outer peripheral surface 10 at odd places (two places on the left and right and a total of three places on the lower side in this embodiment). Thus, the fitting angle when the cylindrical portion 7 is fitted into the opening 6 can be uniquely determined.

  When the outer straight portion 11 is formed at two locations on the outer peripheral surface 10, the notch lines 13a and 13b constituting each outer straight portion 11 are arranged at positions where they are not parallel to each other, as shown in FIG. Thus, the fitting angle when the cylindrical portion 7 is fitted into the opening 6 can be uniquely determined.

(Embodiment 2)
As shown in FIG. 5, the present embodiment has an inner straight portion 15 in which an inner peripheral surface 14 facing the outer peripheral surface 10 on which the outer straight portion 11 is formed is linearly cut out.

  In the first embodiment on the premise that the outer straight portion 11 is formed without narrowing the ventilation space in the cylindrical portion 7, the length of each outer straight portion of the outer straight portion 11 is the cylindrical portion. 7 is not limited to the range in which the thickness 12 remains, and the length cannot be longer than a predetermined value, and the outer straight portions are formed at a plurality of locations to ensure the total length of the outer straight portions. In addition, since it is assumed that the inner straight portion 15 that is linearly cut out is formed on the inner peripheral surface 14 of the cylindrical portion 7, the length of each portion of the outer straight portion 11 is set to the radius of the cylindrical portion 7. It can be secured freely within the following range.

(Embodiment 3)
In any of the above-described embodiments, the cylindrical portion is defined as “means for defining the fitting position of the housing 1 in the opening 6 and preventing the rotational movement from the fitting position when the fastening screw 9 is fastened”. The outer straight surface 11 is formed by cutting out the outer peripheral surface 10 of the housing 7 linearly in the front-rear direction, but “the position of fitting into the opening 6 of the housing 1 is defined and the fastening screw 9 The means for preventing the rotational movement from the fitting position at the time of fastening is only required to be an outer notch part in which the outer peripheral surface 10 of the cylindrical part 7 is notched in the front-rear direction, and in particular, it is cut linearly. It is not limited to what was lacking, and it may be notched in a curved shape. In addition, as shown in FIG. 6, a concave groove 17 can be formed as the outer notch.

DESCRIPTION OF SYMBOLS 1 Case 2 Outer blade | wing part 3 Outer louver 4 Inner blade | wing part 5 Louver main body 6 Opening part 7 Cylindrical part 8 Screw part 9 Fastening screw 10 Outer surface 11 Outer straight part 12 Thickness 13a, 13b Notch line 14 Inner surface 15 Inner straight part 16 Notch side 17 Concave groove

Claims (2)

An inner peripheral surface fitted into a ventilation opening formed in the housing of the electrical equipment storage box is a circular cylindrical part, a louver body provided with a slat covering the opening, and an outer periphery of the cylindrical part A circular louver device for an electrical equipment storage box comprising a fastening screw that is screwed to a screw portion formed on a surface and fixes the louver body to the housing,
As a means for prescribing the fitting position of the cylindrical portion into the opening and preventing rotational movement from the fitting position when fastening screws are tightened, a part of the screw portion on the outer peripheral surface of the cylindrical portion is moved back and forth. A circular louver device for an electrical equipment storage box, comprising a plurality of outer notches cut out in a direction.   The circular louver device for an electric equipment storage box according to claim 1, wherein an outer straight portion is formed as the outer cut portion by cutting out the outer peripheral surface of the cylindrical portion in a straight line.

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