JP2016219536A - Plastic box for housing electrical equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plastic box for housing electrical equipment having a structure in which a roof covering an upper part of a door is formed integrally with a body to prevent rain water from entering inside the body when the door is opened.SOLUTION: A plastic box for housing electrical equipment includes a body 10 housing the electrical equipment therein and a door 11 covering the front opening thereof, in which a roof part 14 covering the upper portion of this door 11 is formed integrally with the body 10 in the upper portion of a boy ceiling face 13. The body ceiling face 13 on the lower side of the roof part 14 is an inclined face which becomes lower as it goes close to the back side. Moreover, on the back side of the roof part 14, an opening 20 for water drainage is formed.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a plastic box for storing electrical equipment that can be installed outdoors.

  The plastic box for storing electrical equipment is used, for example, for a distribution board for construction, and is sometimes installed outdoors. Such a plastic box for storing electric equipment includes a main body in which electric equipment is stored, and a door that covers a front opening of the main body.

  A packing is disposed between the door and the main body, and rainwater does not enter the main body when the door is closed. In such an electrical equipment storage box installed outdoors, in order to improve waterproofness and prevent solar radiation on the packing, as shown in Patent Document 1, an electrical equipment in which a roof portion covering the upper portion of the door is attached to the upper portion of the main body. A plastic box for storage is used.

  In the electric equipment storage plastic box of Patent Document 1, the roof part is attached to the main body by a fixing bracket and the rear part is attached to the main body by a bolt and nut. However, there are problems that the number of parts increases and that it takes time to attach the roof portion to the main body.

  In order to solve this problem, as shown in FIG. 1, the present applicant has developed a plastic box for storing electrical equipment in which a roof portion 2 covering the upper portion of the door 1 is formed integrally with the main body 3. In this electric equipment storage plastic box, as shown in FIG. 1, the upper end side 6 of the door 1 enters the under-roof space 5 formed between the lower side of the roof portion 2 and the main body ceiling surface 4. . The upper end 6 of the door 1 is provided with a gap 8 so as not to rub against the roof 2. Further, a packing 7 is attached to the inner surface of the door 1, and a waterproof seal is provided between the end surface of the opening of the main body 2.

  In order to mold the roof portion 2 having the structure shown in FIG. 1 integrally with the main body 3 with plastic, it is necessary to remove the mold for molding the under-roof space 5 in the left direction of FIG. Accordingly, the main body ceiling surface 4 on the lower side of the roof portion 2 which is the floor surface of the roof space 5 has a structure in which the front side (door side) is lowered in order to ensure a draft angle. Such a gradient that the front surface is lowered may cause rainwater that has entered the roof space 5 from the gap 8 to flow out when the door 1 is opened.

  However, when the door 1 is closed, the packing 7 is provided at the front end of the roof space 5, and rain water that has entered the roof space 5 may accumulate on the back surface of the packing 7. This rainwater dropped at the moment when the door 1 was opened and entered the inside of the main body 3 to wet the stored electrical equipment.

JP-A-8-32252

  Accordingly, the object of the present invention is to solve the above-described conventional problems, and rain water does not enter the inside of the main body when the door is opened, although the roof covering the upper part of the door is formed integrally with the main body. It is to provide a new plastic box for storing electrical equipment.

  The present invention made in order to solve the above problems includes a main body in which an electric device is accommodated and a door that covers a front opening of the main body, and a roof portion that covers the upper portion of the door is located above the ceiling surface of the main body. A plastic box for storing electrical equipment integrally formed with a main body, wherein the main body ceiling surface below the roof portion is an inclined surface that becomes lower toward the back side, and water is provided on the back side of the roof portion. A punching opening is formed.

  The invention of claim 2 is characterized in that, in the invention of claim 1, a rising side extending upward is formed at the upper end edge of the opening of the main body.

  The invention of claim 3 is characterized in that, in the invention of claim 1 or 2, a hanging side extending downward is formed on the back side of the roof portion.

  The plastic box for storing electrical equipment according to the present invention has a structure in which a roof portion covering the upper side of the door is formed integrally with the main body above the ceiling surface of the main body, and therefore has a smaller number of parts than the structure of Patent Document 1. Therefore, since the number of steps for attaching the roof portion is eliminated, the manufacturing cost can be reduced.

  In the plastic box for storing electrical equipment according to the present invention, the main body ceiling surface on the lower side of the roof portion is an inclined surface that becomes lower toward the back side, and a water drain opening is formed on the back side of the roof portion. Therefore, it can be manufactured at low cost by using a mold that is pulled out to the back side. Moreover, since rainwater that has entered the space under the roof flows out from the drainage opening to the back side of the main body and does not accumulate, there is no possibility of dripping when the door is opened.

  In the plastic box for storing electrical equipment according to the second aspect of the present invention, the rising edge extending upward is formed at the upper end edge of the opening of the main body, so that the water that has entered the space under the roof from the drain opening on the back side is It cannot enter any further due to the rising edge, and does not reach the contact portion between the door and the main body. Therefore, the waterproof effect can be enhanced.

  Since the plastic box for storing electrical equipment according to the invention of claim 3 is formed with a hanging side extending downward on the back side of the roof portion, the amount of rainwater entering the space under the roof from the drain opening on the back side is suppressed. can do.

It is principal part sectional drawing of the conventional plastic box for electrical equipment accommodation. 1 is an overall view showing an embodiment of the present invention. It is a back perspective view showing an embodiment of the present invention. It is a section perspective view of the important section showing the embodiment of the present invention. It is principal part sectional drawing which shows embodiment of this invention. It is a general view which shows other embodiment.

Embodiments of the present invention will be described below.
As shown in FIG. 2, the plastic box for storing electrical equipment according to the present invention includes a box-shaped main body 10 in which electrical equipment is stored, and a door 11 that covers the front opening of the main body 10. Both the main body 10 and the door 11 are plastic molded bodies. The door 11 is attached to the main body 10 so as to be openable and closable by a hinge (not shown). Reference numeral 12 denotes a handle for opening and closing the door 11, which has a locking function.

  Above the main body ceiling surface 13, a roof portion 14 that covers the upper side of the door 11 is formed integrally with the main body 10. As shown in FIG. 3, the roof portion 14 is formed over the entire width of the main body 10, and the widthwise ends on both sides thereof are integrated with the side wall 16 of the main body 10 by the vertical sides 15. The roof portion 14 has a bowl shape as shown in FIGS. 4 and 5 and covers the entire upper portion of the door 11. In this embodiment, the vertical sides 15 are formed at the left and right end portions, but can also be formed at the intermediate portion.

  As shown in FIGS. 4 and 5, an under-roof space 17 is formed below the roof portion 14, and the upper end side 18 enters the under-roof space 17 when the door 11 is closed. . At this time, a gap 19 is formed between the upper end side 18 of the door 11 and the roof portion 14 so that the upper end side 18 of the door 11 does not contact the roof portion 14.

  In the conventional structure shown in FIG. 1, the under-roof space 5 is formed using a mold that is pulled out to the front side (door side) of the main body 10. On the other hand, in this invention, the opening part 20 for drainage is formed in the back side of the roof part 14, and it uses a metal mold | die pulled out to the back side (opposite side of a door) through this opening part 20 for drainage. A lower space 17 was formed. For this reason, the escape angle of the mold is opposite to the conventional one, and the main body ceiling surface 13 on the lower side of the roof portion 14 is an inclined surface that becomes lower toward the back side. In addition, the broken line 21 in FIG. 5 has shown the horizontal surface.

  As shown in FIGS. 4 and 5, a rising side 22 extending upward is formed at the upper end edge of the opening of the main body 10. A packing 24 is provided between the upright side 22 and the upper vertical wall 23 of the door 11. The height of the upright side 22 is set so as not to contact the door 11. The packing 24 may be provided on the door 11 side or on the main body 10 side.

  A hanging side 25 extending downward is formed on the back side of the roof portion 14. This drooping side 25 hangs down from the upper side of the above-described drain opening 20 to reduce the opening area into which rainwater blows. The drooping side 25 has a reinforcing effect on the roof portion 14. If protruding sides similar to the hanging side 25 are formed on the left and right sides of the main body 10, rainwater can be reliably guided to the lower side of the main body 10.

  Since the plastic box for storing electrical equipment according to the present invention configured as described above has the roof portion 14 formed integrally with the main body 10, the manufacturing cost can be reduced. The roof part 14 provided with the drooping side 25 can be easily formed using a mold that is pulled out to the front side and a mold that is pulled out to the rear side.

  This plastic box for storing electrical equipment is installed outdoors as a switchboard, for example, and rainwater enters the under-roof space 17 through a gap 19 between the roof portion 14 and the upper end side 18 of the door 11 as in the conventional case. It is. However, since the main body ceiling surface 13 on the lower side of the roof portion 14 has an inclined surface that becomes lower toward the back side, the rainwater that has entered is drained to the back side through the drainage opening 20. Therefore, the water accumulated in the under-roof space 17 is not dropped when the door 11 is opened, and does not wet the electrical equipment inside the main body 10.

  Further, if the rising edge 22 extending upward is formed at the upper end edge of the opening of the main body 10 as in this embodiment, even when a jet flows from the opening 20 for drainage, it is blocked by the rising edge 22. Rainwater does not reach the opening of the main body 10. For this reason, waterproof performance can be ensured even when wind and rain blow directly. The tip position of the upright side 22 and the tip position of the drooping side 25 correspond to the height from the main body 10.

  Further, if the hanging side 25 is formed on the back side of the roof portion 14 as in the present embodiment, the opening area of the drain opening 20 into which rainwater blows can be reduced. The amount of rainwater entering the inside can be suppressed.

  In the embodiment described above, the main body ceiling surface 13 is inclined so as to become lower toward the back side, but as shown in FIG. 6, a gradient is also formed in the left-right direction so that rainwater is guided to the left and right of the main body ceiling surface 13. It may be.

DESCRIPTION OF SYMBOLS 1 Door 2 Roof part 3 Main body 4 Main body ceiling surface 5 Roof space 6 Upper end side 7 Packing 8 Crevice 10 Main body 11 Door 12 Opening / closing handle 13 Main body ceiling surface 14 Roof portion 15 Vertical side 16 Side wall 17 Under roof space 18 Upper end side 19 Clearance 20 Drain opening 21 Broken line 22 Vertical side 23 Upper vertical wall 24 Packing 25 Hanging side

Claims (3)

It is a plastic box for storing electrical equipment, which has a main body in which electrical equipment is stored and a door that covers the front opening of the main body, and a roof that covers the top of the door is formed integrally with the main body above the ceiling of the main body. And
The main body ceiling surface on the lower side of the roof portion is an inclined surface that becomes lower toward the back side,
And the drainage opening part is formed in the back side of the said roof part, The plastic box for electrical equipment accommodation characterized by the above-mentioned.   2. The plastic box for storing electrical equipment according to claim 1, wherein a rising edge extending upward is formed at an upper end edge of the opening of the main body.   3. The plastic box for storing electrical equipment according to claim 1, wherein a drooping side extending downward is formed on a back surface side of the roof portion.

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