JP4626427B2 - Exterior panel structure of air conditioning unit - Google Patents

Description

  The present invention relates to an exterior panel structure of an air conditioning unit intended for an air conditioner that is installed and used in a clean room, for example.

First, FIG. 3 and FIG. 4 show an outline of the configuration of the head air-conditioning unit that is an object of the present invention. In each figure, 1 is an air conditioning unit body, 2 is a base, 3 is an exterior panel, 4 is an air suction grille, and 5 is a top plate on the discharge side of the air conditioning air. Here, the exterior panel 3 surrounds a frame (support) 6 constructed by each panel on the unit main body 1 and is fastened and fixed to its peripheral surface via bolts 7. For example, air-conditioning equipment in which a water-cooled heat exchanger) 8, a blower 9, a filter (for example, a HEPA filter) 10, etc. are mounted is mounted, and the indoor air sucked from the suction grid 4 is cooled by the cooler 8. The dust is removed by the filter 10 and discharged into the room as clean air conditioned at an appropriate temperature.
Next, the conventional structure of the exterior panel 3 described above is shown in FIGS. That is, the exterior panel 3 has a thin steel plate outer panel plate 11 which is formed into a U shape with the periphery facing the back surface side, a thin steel plate inner panel plate 12 combined with the rear surface of the outer panel plate 11, and the outer panel plate 11. It is made of foamed resin (hard urethane foam) 13 that is foam-molded in the space between the inner panel plate 12 and the inner and outer panel plates, and is bolted to the outer panel plate 11 and the inner panel plate 12 in advance at predetermined positions. An insertion hole is drilled, and the exterior panel 3 is fastened and fixed to the main body frame 6 as shown in FIG. Thus, the exterior panel 3 having a three-layer structure in which the outer panel plate 11 and the inner panel plate 12 are integrated with the foamed resin (hard urethane foam) 13 is mechanically increased in addition to the function as a heat insulating wall. .

  On the other hand, in order to assemble the outer panel 3 having the above structure, the outer panel plate 11 and the inner panel plate 12 are temporarily assembled in a jig for foam molding, and in this state, between the outer panel plate 11 and the inner panel plate 12. A molding method is adopted in which a stock solution of foamed resin is injected into the space and cast and foamed. Here, in order to prevent the foamed resin from leaking out from the butt joint between the outer panel plate 11 and the inner panel plate 12 and the bolt insertion holes drilled in the inner and outer panel plates in the casting foaming process. In the conventional structure, the seam (gap) between the peripheral edge of the inner panel plate 12 and the folded peripheral edge of the outer panel plate 11 to be abutted with the inner panel plate 12 is sealed with a seal 14, and the inner panel plate 11 and the inner panel plate A cylindrical spacer 15 that becomes a resin molded product is interposed between the panel board 12 and a temporary assembly, and a bolt insertion hole is secured after foam molding using the spacer 15 as a core, and foam resin is used in the foam molding process. Is prevented from leaking from the bolt insertion hole.

In addition, about the side wall of the refrigerated showcase which employ | adopted the structure similar to the said exterior panel 3, in order to prevent a foamed resin from leaking from the bolt insertion hole of a panel in the casting foaming process of a foamed resin, a showcase side wall A configuration in which a spacer is interposed between the outer panel plate and the inner panel plate is known (see, for example, Patent Document 1).
Japanese Patent Publication No.59-19269

By the way, the above-described exterior panel 3 has the following problems in the conventional structure described in FIG. That is, prior to the molding process of the foamed resin 13, the cylindrical spacer 15 is placed between the inner and outer panel plates by aligning the positions of the bolt insertion holes drilled in the outer panel plate 11 and the inner panel plate 12 with the exterior panel 3 temporarily assembled. If set, the spacer 15 will be displaced from the initial setting position due to the foaming pressure of the resin, and the foamed resin will leak into the bolt insertion hole from the gap formed between the end face of the spacer 15 and the panel plate. Trouble filling the hole occurs.
Further, when the exterior panel 3 is assembled to the air conditioning unit main body frame 6 of FIG. 4, the position of the bolt hole drilled in the frame 6 and the position of the bolt insertion hole drilled in the exterior panel 3 due to the dimensions and assembly errors of the frame 6. However, in this case, in the conventional structure, the direction of the bolt 7 inserted into the panel 3 is restricted by the hole diameter of the cylindrical spacer 15, so that the outer panel 3 cannot be bolted as it is. It is necessary to adjust the bolt pilot holes on site.

  The present invention has been made in view of the above points, and an object of the present invention is to reliably prevent leakage of foamed resin in conjunction with positioning and holding during temporary assembly with respect to a spacer interposed between inner and outer panel plates of an exterior panel. In addition, another object of the present invention is to provide an exterior panel structure for an air conditioning unit that is improved so that bolts can be easily tightened when assembled to a main body frame.

In order to achieve the above object, according to the present invention, there is provided an exterior panel structure of an air conditioning unit that surrounds a main body frame on which air conditioning equipment is mounted and is laid on the peripheral surface thereof. In a structure in which a foamed resin is cast and foamed in a space between the panel plate and the bolt is inserted into a bolt insertion hole drilled in the panel and fastened to the main body frame,
A cylindrical spacer for inserting a bolt between the outer panel plate and the inner panel plate with a position in the bolt insertion hole is interposed, and the spacer has a fitting portion at one end thereof, The fitting part is inserted into the bolt insertion hole of the mating panel plate and positioned and held, and the cushion seat serving as a seal is stacked on the other end surface, and the cushion seat is pressed against the inner surface of the mating panel plate to The gap is sealed (Claim 1).
In the exterior panel structure, the bolt insertion hole of the spacer is a tapered hole whose diameter increases toward the inner panel plate, so that the degree of freedom in tilting the bolt inserted into the exterior panel is increased. .

According to the above configuration, in the temporarily assembled state of the exterior panel, the spacer fitting portion interposed between the outer panel plate and the inner panel plate is fitted into the bolt insertion hole of the panel plate and positioned and held at a predetermined position. The space between the spacer and the panel plate can be surely sealed through the cushion seat overlapped on the other end side. Thereby, even if foaming pressure acts on the spacer in the subsequent foaming process of the foamed resin, the spacer is not displaced from the fixed position, and the foamed resin can be reliably prevented from leaking into the bolt insertion hole.
Furthermore, by increasing the degree of freedom in tilting the bolts inserted through the spacer bolt insertion holes as taper holes that expand toward the inner panel plate, the bolts on the frame side when assembling the exterior panel to the frame of the unit body Even if the pilot hole and the bolt insertion hole of the exterior panel are slightly deviated from each other, the bolt can be easily fastened without adjusting the bolt hole.

  Embodiments of the present invention will be described below based on the examples shown in FIGS. 1 (a) and 1 (b). In addition, in the figure of an Example, the same code | symbol is attached | subjected to the member corresponding to FIG. 2, and the detailed description is abbreviate | omitted. That is, in the illustrated exterior panel 3, the cylindrical spacer 15 that is a resin molded product interposed between the outer panel plate 11 and the inner panel plate 12 has one end side (the opposite end to the outer panel plate 11). ) Is formed on the end surface, and a flange portion 15b is formed on the end surface on the other end side (the end facing the inner panel plate 12), and the end surface of the flange portion 15b is formed on the end surface of the flange portion 15b. A perforated cushion seat (for example, a soft polyethylene sheet having a thickness of about 4 mm) 16 serving as a seal is attached with an adhesive. Further, as shown in FIG. 1B, the outer shape of the spacer 15 is a cone shape, and the bolt insertion hole penetrating in the axial direction is a tapered hole whose hole diameter increases from the outer panel plate side toward the inner panel plate side. The degree of freedom of the bolt 7 inserted through the exterior panel 3 is increased so that the bolt tip can be displaced in the direction of the arrow P shown in the figure.

Then, when the outer panel plate 11 and the inner panel plate 12 are temporarily assembled in the foam molding jig in the step of foaming the foamed resin 13, the bolt 15 is inserted into the outer panel plate 11 with the fitting portion 15 a of the spacer 15. The cushion seat 16 is pressed against the inner panel plate 12 in a temporarily assembled state, and the gap between the spacer 15 is sealed. By foaming the foamed resin 13 in this state, the foaming can be performed without the spacer 15 being displaced from the initial set position by the foaming pressure, and without the foamed resin leaking into the bolt insertion hole. In the illustrated example, the outer peripheral edge of the inner panel plate 12 and the folded portion of the outer panel plate 11 are overlapped and sealed with a seal (double-sided adhesive tape) 14.
Further, when the exterior panel 3 is assembled to the frame 6 of the unit main body of FIG. 4, even if the bolt side hole on the frame side and the bolt insertion hole of the exterior frame 3 are slightly shifted due to an assembly error or the like, as described above. By setting the hole of the frame 15 as a taper hole, the direction of the bolt 7 can be slightly tilted and screwed into the bolt hole of the frame 6 without adjusting the bolt hole.

BRIEF DESCRIPTION OF THE DRAWINGS It is principal part structure drawing of the exterior panel by the Example of this invention, (a) is sectional drawing, (b) is an expanded perspective view of the spacer in (a). FIG. 2 is a structural diagram of a conventional exterior panel, where (a) is a partially cutaway rear view, and (b) is a cross-sectional view taken along line XX in (a). External view of an air conditioning unit that is an object of the present invention Assembly structure diagram of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Air-conditioning unit main body 3 Exterior panel 6 Unit main body frame 7 Bolt 11 Outer panel board 12 Inner panel board 13 Foamed resin 15 Spacer 15a Fitting part 16 Cushion seat

Claims (2)

This is an exterior panel structure of an air conditioning unit that surrounds the body frame carrying the air conditioning equipment and is laid on the peripheral surface. The exterior panel is cast and foamed with foamed resin in the space between the outer panel plate and the inner panel plate. In the structure that is tightened to the main body frame through the bolt through the bolt insertion hole drilled in the panel,
A cylindrical spacer for inserting a bolt between the outer panel plate and the inner panel plate with a position in the bolt insertion hole is interposed, and the spacer has a fitting portion at one end thereof, The fitting part is inserted into the bolt insertion hole of the mating panel plate and positioned and held, and the cushion seat serving as a seal is stacked on the other end surface, and the cushion seat is pressed against the inner surface of the mating panel plate to An exterior panel structure of an air conditioning unit characterized by sealing the gap. 2. The exterior panel structure of an air conditioning unit according to claim 1, wherein the bolt insertion hole of the spacer is a tapered hole whose diameter is increased toward the inner panel plate.

Images