JP-7857076-B2 - Fixing structure for power lines in power equipment

Inventors

• 久野 貴大
• 猿渡 直人
• 田端 雄樹
• 奥村 慎也
• 相宮 孝政

Assignees

• オムロン株式会社

Dates

Publication Date

20260512

Application Date

20200831

Claims (3)

1. A fixing structure for electric wires in power equipment installed on the wall surface of a building, The aforementioned power equipment is The attachment, which has a smaller internal space than the aforementioned power equipment, is configured to be attachable to the bottom side of the power equipment's casing. The power equipment has a wire insertion opening provided at the bottom of the housing for inserting the electric wire into the housing, and a wire fixing member that fixes the electric wire in the state where it is inserted into the housing and seals the wire insertion opening. The aforementioned electric wire is routed from the wall side of the building through the electric wire insertion opening into the housing, and is concealed from the outside by the attachment when the attachment is installed. The wire fixing member is screwed into the housing at the wire insertion opening with the wire inserted inside, thereby fixing the wire in the state of being inserted into the housing , and protruding only toward the inside of the housing. A fixing structure for electric wires in power equipment, characterized by the above.
2. The aforementioned power equipment is a power conditioner in a solar power generation system. A wire fixing structure for power equipment according to claim 1, characterized in that
3. The aforementioned wire is a power line connected to other power equipment. A wire fixing structure for power equipment according to claim 2, characterized in that

Description

This invention relates to a fixing structure for electric wires connected to power equipment. Conventionally, when wiring power equipment to connect to the outside, means for fixing the wires and sealing the wiring connections are generally provided (for example, Patent Document 1). Patent Document 1 discloses a device installed in a junction box of a solar power generation system, in which cables wired from both sides of the housing to input/output terminals inside the housing are fixed with cable glands. As described in Patent Document 1, when wires are routed in this manner, the component through which the wires are inserted (the nut portion of the cable gland) protrudes from the outside of the equipment casing. However, this structure, where the component that secures the wires protrudes from the outside of the equipment casing, can sometimes detract from the aesthetic appearance of the equipment. Furthermore, for equipment enclosures installed outdoors and exposed to the elements, such as on the walls of buildings, a design is sometimes adopted where the wiring entry point is located on the bottom of the enclosure to prevent rainwater intrusion. In such cases, attempting to run wiring from the bottom of the equipment and secure it with a cable gland requires cramped and awkward working positions, making it difficult to visually inspect the work area. Additionally, because the work is performed from the bottom of the equipment towards the interior (i.e., against gravity), there is a risk of dropping components during the process. Furthermore, for example, when routing electrical wires into the enclosure via an attachment such as a wiring box to conceal the wiring, if there are components protruding from the outside of the enclosure, the wiring (securing the wires) work will have to be done inside the attachment. In such cases, the wiring work is forced to be done in the narrow workspace inside the attachment, which reduces work efficiency. On the other hand, if sufficient workspace is to be provided inside the attachment, the attachment will have to be made larger, which is a drawback. Japanese Patent Publication No. 2015-198484 Figure 1 is a perspective view showing a schematic configuration of a power conditioner according to an embodiment.Figure 2 shows the configuration of a power conditioner according to an embodiment, and is a front view showing the power conditioner mounted on a wall with the front cover removed.Figure 3 is a perspective view showing the schematic configuration of a wiring box according to this embodiment. The following describes embodiments relating to one aspect of this disclosure, based on the drawings. However, unless otherwise specified, the dimensions, materials, shapes, and relative arrangements of the components described in the following embodiments are not intended to limit the scope of this invention to those specific components. <Examples of application> First, examples of applications of the present invention will be described based on Figures 1 and 2. Figure 1 is a perspective view showing the configuration of a power conditioner 10 according to an embodiment. Figure 2 is a front view showing the power conditioner 10 mounted on a wall with the front cover removed. Note that in Figure 2, some components are cut out. As shown in Figures 1 and 2, the power conditioner 10 comprises a roughly rectangular main body 11, a wiring box 20 attached to the front half of the lower side of the main body 11, and a wire duct 3 located on the lower side of the main body 11 and on the rear left side of the wiring box 20. Furthermore, as shown in Figure 2, the lower (bottom) side of the main body 11 is provided with multiple wire insertion openings 12 for drawing the electric wires 4 into the main body 11, and a cable gland 15 is attached to each wire insertion opening 12. The cable gland 15 is a component that secures the electric wire 4 in the state where it is inserted into the main body 11, preventing the electric wire 4 from coming loose due to vibration or pulling, and sealing the electric wire insertion opening 12 to prevent dust and water from entering the main body 11. The cable gland 15 generally comprises a base portion 152 fixed to the housing of the main body 11, and an electric wire fixing portion 151 through which the electric wire 4 is inserted and which is screwed into the base portion 152. The electric wire fixing portion 151 has a roughly cylindrical shape that protrudes inward toward the main body 11. Thus, with the wire fixing portion 151 of the cable gland 15 protruding toward the inside of the main body 11, the worker can access the wire insertion opening 12 and the cable gland 15 from above during wiring work. This eliminates the inconveniences that occur when working from below the main body 11, such as being forced into an awkward posture, poor visibility of the work area, and the risk of dropping parts, thereby improving work efficiency. Furthermore, as in t