Door panel

Abstract

Provided is a door panel wherein small ventilation holes are easily arranged while ensuring rigidity. The door panel is provided with an outer board (21) having an opening section (26); an inner board (23) having an opening section (30), which is formed by making an uneven shape to the outer board (21) by press-formation and fixing a recessed section on the inner surface of the outer board (21); and an opened uneven plate (31) attached to the inner board (23) from the rear side. The opened uneven plate (31) is a punching plate wherein many small ventilation holes are previously made in round shapes or in mesh-shape, namely, in honeycomb core shape. The opened uneven plate has recessed sections (32a) and protruding sections (32b) repeatedly formed in a region that correspond to each opening section (30) of the inner board (23).

Description

technical field [0001] The present invention relates to a door panel having an outer panel and an inner panel. Background technique [0002] Figure 9 Represents a hydraulic excavator 10 as an operating machine, on which an upper revolving body 12 is rotatably provided on an undercarriage 11, and a power unit such as a driver's cab 13, an operating device 14, and an engine is mounted on the upper revolving body 12 15. The power unit 15 is covered by an upper cover 16, a side door 17, and the like. The side door 17 is installed so as to be freely openable and closable by a hinge on one side, and is kept closed by a latch device 18 on the other side. [0003] As such a door panel structure, there is a cover structure of a double-layer structure in which an inner panel that is press-formed to be concave-convex relative to the outer panel is fixed to the inner surface of the outer panel (for example, refer to Patent Document 1). [0004] And, proposed Figure 10 and Figure...

AI Technical Summary

Problems solved by technology

Moreover, there is also a problem that the plate itself of the outer plate 21 is too large to limit the types of processing (size of processing equipment, etc.)

[0007] In addition, depending on the application, when there is a lot of flying dust, in order not to inhale the dust, it is also required to provide fine mesh-shaped ventilation holes on the outer plate 21. to deal with

[0008] In addition, a method of sandwiching a thin plate with a vent hole between the outer plate and the inner plate has also been considered. However, when the size of the required vent hole is extremely small (diameter less than 3.0mm), it is still necessary to insert a thin plate with a vent hole. The thickness of the plate is reduced to the point where the rigidity is insufficient

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