JPS6218376B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to a meat rail support device for a refrigerated trailer with column-free walls and roof panels filled with foam.

BACKGROUND OF THE INVENTION Over-the-road trailers suitable for transporting products, meat, and other goods that are suspended from the roof have different structural and thermodynamic considerations than trailers whose loads are placed directly on the trailer floor. I need. The load transfer relationship between the roof and side walls must be carefully designed to properly distribute the weight of suspended items. Such structural problems are particularly acute when the trailer is, for example, a refrigerated trailer transporting meat carcasses. Often walls and ceilings are insulated with materials that stand on their own but are not capable of supporting substantial weight. Such refrigerated trailers often have relatively thin skin walls secured to columns to support the weight of items suspended from the roof.

Objects and Arrangements of the Invention Accordingly, it is a general object of the present invention to provide a columnless wall rail support system for refrigerated trailers in which both the inner and outer skins of the walls are adapted to support the load.

providing on both side walls of the trailer an outer top rail extending the length of the trailer, the rail being fixed to the outside of the side and having a flange extending above the upper end of the side wall; and an inner top rail being fixed to the side wall and having a flange; By securing a meat rail support beam extending transversely of the trailer to the side wall through at least the flange of the inner top rail, the loads on the meat rail support beam are substantially equally directly applied to the inner and outer skins of the side wall. The purpose of the invention to communicate is achieved.

Other objects, features and advantages of the invention will become apparent from the following description taken in conjunction with the accompanying drawings.

In a first aspect of the invention, an inner top rail of a low thermal conductivity material, e.g. have. Meat rail support beams extend across the trailer and rest on the flanges of the inner and outer upper rails. A fastening device is provided intermediate the inner and outer skins of the sidewalls.

In a second embodiment, the meat rail support beam is secured to an inwardly extending flange of the inner top rail, and the plastic inner skin of the sidewall is linearly secured to the outside top rail.

In both cases, measures are taken to minimize heat transfer from the inside walls of the trailer to the outside of the trailer.

<Details of aspects> FIG. 1 shows a pair of side walls 12, 14 and a floor member 1.
6. Front wall member 18, roof member 20 and rear wall member 2
2 shows a refrigerated trailer 10 for long distance transportation.
One of the side wall members 12 or 14 or the rear wall member 22
one or more doors (not shown). A refrigeration system (not shown) is also mounted on the trailer to maintain the interior of the trailer at a desired temperature.

In a first embodiment, as shown in FIG. 2, sidewall 12 and opposing sidewall 14 are comprised of a plastic skin-foam laminate construction. The sidewall 12 has an inner plastic skin 24 and an outer plastic skin 26 with a layer of sandwiched insulation foam 28 therebetween. Foam 28 is injected or injected between the inner and outer skins 24 and 26 and is firmly secured to the panel to form a relatively lightweight insulating wall. Similarly, the roof member 20 includes a metal outer skin 30 and a plastic inner skin 32 with a layer of sandwiched insulation foam 34 therebetween.

A plurality of meat rail support beams 36 are integrally embedded within the foam structure of the roof member 20 for use as a refrigerated meat trailer. The rail support beam 36 typically comprises a metal beam that is secured in place between the inner skins 30, 32 of the roof panel before the foam is injected therebetween. The meat rail support beam 36 is
For example, by means of bolts 42 and nuts 40, side wall 1
2 and 14 are provided with holes 38 at both ends.

The outer upper rails 44 each have blind rivets 4.
6 and 48 are fixed together to the side wall 12 and the outer skin 30 of the roof member 20. In this regard, a cap strip 49 is provided to strengthen the connection between the rail 44 and the roof skin 30.

In accordance with the present invention, the outer top rail 44 includes an inwardly extending flange portion 50 that extends the length of the trailer 10 for attaching the meat rail support beam 36. An opening 52 is provided in the flange portion 50 of the upper rail 44 to receive the bolt 42.

An inner top rail 54 of non-thermal conductive material, e.g. FRP plastic, is attached to the side wall 1 by blind rivets 56.
It is fixed to the endothelium 24 of No. 2. The inner upper rail 54 has a substantially vertical flange portion 58 and a substantially horizontal flange portion 60;
The flange portion 58 is secured to the inner skin 24 of the sidewall. The flange portion 60 is attached to the side wall 12 in upper opening relation to the inwardly extending flange of the outer upper rail 44.
extends horizontally outward on the top of the A plurality of openings 62 are provided in the flange 60 of the inner upper rail 54 to receive the bolts 42.

For one side wall, outer and inner upper rails 44, 54 flanges and flesh rail support beams 36
The openings in the sidewalls are approximately the inner skin 24 and outer skin 26 of the side wall.
It can be seen that it is positioned in the middle. This aspect minimizes the loading of the inner skin 24 and outer skin 26 of the side walls 12, 14 during loading in a relatively uniform manner.

According to a second embodiment of the invention, sidewall 12 and opposing sidewall 14 have a plastic skin-foam laminate construction as described above, ie, a plastic inner skin 24 and a plastic outer skin 26 with a sandwich sandwich therebetween. It consists of a structure with a layer of foam 28 of a shaped insulating structure. Foam 28
is injected or injected between the inner and outer skins 24 and 26,
They are joined to the panels with butts to form a relatively lightweight insulating wall. Similarly, the roof member 20 includes a metal outer skin 30 and a plastic inner skin 32 with a layer of sandwiched insulation foam 34 therebetween.

The roof panel 20 includes a plurality of rail support beams 6
6, which is embedded within the foam structure of the roof panel. The flesh rail support beam 66 comprises a metal beam or the like that is secured in place between the skins 30, 32 of the roof panel before the foam is injected between the skins. The meat rail support beam 66 has holes 68 at both ends thereof,
This is used, for example, to connect by means of bolts 71 to the longitudinally extending inner upper rail 70.

The inner upper rail 70 is secured to the outer upper rail 72 by rivets 73. Cap strips 74 are provided to strengthen the connection between rails 70, 72 and roof skin 30.

In this embodiment, the outer top rail 72 has a pair of downwardly extending flanges 80, 82 which extend the length of the trailer 10 for attachment to the outer skin 26 and inner skin of the side walls by rivets 84, 86, respectively. The upright flange 88 is located between the flanges 80, 82 and thus on the inner and outer sides 24, 26 of the sidewalls.
supports the inner upper rail 70 between the planes of the inner upper rail 70 to transfer loads thereon relatively uniformly.

For convenience in injecting foam into the roof panel to form a subassembly, an inner foam bulkhead 90 of, for example, PVC plastic is attached to the inner top by means of clips 92 that engage horizontal flanges 94 of the inner rail 70. It is fixed between the rail 70 and the roof panel inner skin 32.

From the foregoing, it will be appreciated that the sidewalls 12 and roof 20 can be manufactured as subassemblies and joined by rivets 76 after assembly. The load on the meat rail support beam 66 is transmitted substantially equally to both the inner skin 24 and the outer skin 26 of the sidewalls.
In this way, uneven loading and consequent buckling of the side walls 12, 14 can be avoided.

Another feature of the invention is that the sidewall roof system does not have metal heat transfer paths between the interior and exterior of the trailer.

Although specific embodiments of the present invention have been described in particular detail, it is to be understood that the present invention may be modified in various ways in terms of structure and arrangement of parts without departing from the spirit and gist thereof. .

[Brief explanation of the drawing]

FIG. 1 shows a refrigerated trailer using the present invention.
FIG. 2 is a cross-sectional view of a first embodiment of the meat rail support device according to the present invention, taken in the direction of arrow 2--2 in FIG. FIG. 3 is a drawing similar to FIG. 2 of a second embodiment of the invention. FIG. 4 is a view taken in the direction of arrow 3--3 in FIG. 10... Trailer, 12, 14... Side wall, 16
...Floor member, 18...Front wall member, 20...Roof member, 22...Rear wall member, 24...Inner skin of side wall, 2
6...Outer skin of side wall, 28...Insulating structure foam, 3
0...Metal outer skin of the roof member, 32...Plastic inner skin of the roof member, 34...Insulating structure foam, 36...Meat rail support beam, 38... Hole,
40... Nut, 42... Bolt, 44... Outer upper rail, 46, 48... Rivet, 49...
Cap strip, 50... Flange portion of outer upper rail, 52... Opening, 54... Inner upper rail, 56... Rivet, 58... Vertical flange portion of inner upper rail, 60... Inner upper rail Horizontal flange portion, 62...opening, 66...
Flesh rail support beam, 68... hole, 70... inner upper rail, 71... bolt, 72... outer upper rail, 73... rivet, 74... cap strip, 80, 82... outer upper rail downward flange, 84, 86... rivet, 88...
Upright flange, 90... Inner foam bulkhead, 92
...Clip, 94...Horizontal flange.

Claims (1)

[Scope of Claims] 1. An improved structure for a refrigerated trailer for long-distance transportation, comprising a column-free side wall and a roof panel having an outer skin and an inner skin, and having a foam with an insulating structure between them, an outer top rail that is fixed to the side wall and has a flange extending above the upper end of the side wall; an inner top rail that is fixed to the side wall and has a flange;
a flesh rail support beam in said roof panel extending laterally of said side wall, and a fastening device extending through said flesh rail support beam and through a flange of said inner top rail, thereby securing said flesh rail support. A structure characterized in that the loads on the beam are transmitted substantially equally and directly to the inner and outer skins of said side walls. (2) an outer upper rail extending over the entire length of the trailer having a flange fixed to the outer skin of said side wall and extending inwardly above the upper end of said side wall; an inner top rail having an outwardly extending flange; a flesh rail support beam within said roof panel extending laterally of said side wall and intersecting said side wall at an upper end thereof; 2. The structure of claim 1, further comprising a fastening device extending through flanges of the intermediate outer and inner upper rails of said outer skin and inner skin. 3. The structure of claim 2, wherein said inner upper rail is formed of plastic so as to eliminate a metal heat transfer path from the interior of the trailer to the exterior. 4 an outer upper rail extending the entire length of the trailer having downwardly extending flanges fixed to the inner and outer skins of said sidewalls and upwardly extending flanges above the upper ends of said sidewalls and between said downwardly extending flanges; an inner top rail on said roof panel having an inwardly extending flange secured to an upwardly extending flange of the rail; and a flesh rail support beam within said roof panel extending laterally of said side wall. and a fastening device for securing the rail support beam to the flange of the inner upper rail. 5. The structure of claim 4, wherein a foam bulkhead extends between said inner top rail and the inner skin of the roof panel. 6. The structure of claim 5, wherein the upper edge of the foam partition is secured to the inner upper rail by a spring clip.