Patent Application
20150118951
The present disclosure relates to ventilation components, and more specifically to a one piece roll-formed damper frame and method of manufacture.
Frames can be manufactured from separate roll-formed components, but these frames can suffer from a number of problems, such as noise, rattle, looseness, leakage and other problems.
A single piece roll-formed frame is disclosed that includes a first channel having a base section and one or more legs, each leg comprising an upper side extending from the base section at a first angle and a lower side extending from the upper side at a second angle. The single piece roll-formed frame also has a second channel having a base section and one or more legs, each leg comprising an upper side extending from the base section at the first angle and a lower side extending from the upper side at the second angle. The base section of the first channel and the base section of the second channel are formed from a single piece and intersect to form a third angle, and the upper side of each leg of the first channel overlaps the upper side of each leg of the second channel.
Other systems, methods, features, and advantages of the present disclosure will be or become apparent to one with skill in the art upon examination of the following drawings and detailed description. It is intended that all such additional systems, methods, features, and advantages be included within this description, be within the scope of the present disclosure, and be protected by the accompanying claims.
Aspects of the disclosure can be better understood with reference to the following drawings. The components in the drawings are not necessarily to scale, emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views, and in which:
In the description that follows, like parts are marked throughout the specification and drawings with the same reference numerals. The drawing figures might not be to scale and certain components can be shown in generalized or schematic form and identified by commercial designations in the interest of clarity and conciseness.
This invention relates to air handling devices, and more particularly to a one piece frame construction for dampers, louvers or other suitable items, and a method of manufacturing the one piece frame.
Air handling devices are commonly utilized in buildings and other structures to control the flow of air, smoke or other gases through a particular section of the building. For example, building codes often specify that dampers that are used in air handling systems should be used in ductwork to prevent the spread of smoke and combustion air through the air handing system ductwork in the event of fire. Dampers can also or alternatively be used for temperature control, to control air flow, to control an amount of ventilation for a particular structure, or for other suitable purposes.
The construction of air handling system components must be durable to ensure that the air handling system remains operable without the need for frequent repair or replacement. Such components may need to be installed in locations that are not easy to access, and they may be exposed to harsh environmental conditions, such as extreme cold or heat.
There are a number of other constraints on such air handling system components, such as the need to keep the cost of manufacturing low, which is addressed by manufacturing such components from sheet steel that is roll formed. While one piece roll-formed frames are known, the present disclosure provides for transverse slots in the channel shaped longitudinal frame member, to allow the frame sections to be bent to define a frame opening and flanges integral with the channel, which are un-severed to provide continuous integrity throughout the frame perimeter. Tabs formed in the frame web material by extensions of the transverse slots overlap the proximal frame section across the web and are used to provide a caulking edge to seal the damper frame from leakage to the atmosphere. The overlapping material in the corners is secured by means of a rectangular clinch to hold the damper frame square.
Two opposing sides of the four-sided frame shown in
The present disclosure thus includes a method for manufacturing a single piece roll-formed frame having a first channel with a base section and one or more legs, where each leg has an upper side extending from the base section at a first angle and a lower side extending from the upper side at a second angle. A second channel has a base section and one or more legs, where each leg has an upper side extending from the base section at the first angle and a lower side extending from the upper side at the second angle. A third channel has a base section and one or more legs, where each leg has an upper side extending from the base section at the first angle and a lower side extending from the upper side at the second angle. A fourth channel has a base section and one or more legs, where each leg has an upper side extending from the base section at the first angle and a lower side extending from the upper side at the second angle. A plurality of rectangular clinches secures the overlapping upper sides of the legs. A plurality of tabs extends from the base sections of the channels at each intersection of two channels. The base section of the first channel and the base section of the second channel are formed from a single piece and intersect to form a third angle. The upper side of each leg of the first channel overlaps the upper side of each leg of the second channel. The base section of the second channel and the base section of the third channel are formed from the single piece and intersect to form a fourth angle. The upper side of each leg of the second channel overlaps the upper side of each leg of the third channel. The base section of the fourth channel and the base section of the third channel are formed from the single piece and intersect to form a fifth angle. The upper side of each leg of the fourth channel overlaps the upper side of each leg of the third channel. The base section of the fourth channel and the base section of the first channel are formed from the single piece and intersect to form a sixth angle. The upper side of each leg of the fourth channel overlaps the upper side of each leg of the first channel.
The method for manufacturing the single piece roll-formed frame described above includes forming a first tab and at least one adjacent transverse slot in a strip of material. Forming a channel having one or more legs from the sides of the strip of material, each leg having an upper portion and a lower portion, wherein the transverse slot extends into at least the upper portion. Bending the channel at the transverse slot to form a first channel section and a second channel section, wherein the first channel section and the second channel intersect at the tab and the upper portion of the leg of the first channel section overlaps with the upper portion of the leg of the second channel section. Forming a second tab and at least one adjacent transverse slot in the strip of material. Bending the channel at the transverse slot adjacent to the second tab to form a third channel section, wherein the second channel section and the third channel section intersect at the second tab and the upper portion of the leg of the second channel section overlaps with the upper portion of the leg of the third channel section. Forming a third tab and at least one adjacent transverse slot in the strip of material. Bending the channel at the transverse slot adjacent to the third tab to form a fourth channel section, wherein the third channel section and the fourth channel section intersect at the third tab and the upper portion of the leg of the third channel section overlaps with the upper portion of the leg of the fourth channel section. Forming an intersection of the fourth channel section and the first channel section at a fourth tab, where the upper portion of the leg of the fourth channel section overlaps with the upper portion of the leg of the first channel section. Coupling the overlapping the upper portions of each of the legs of the channel sections.
It should be emphasized that the above-described embodiments are merely examples of possible implementations. Many variations and modifications may be made to the above-described embodiments without departing from the principles of the present disclosure. All such modifications and variations are intended to be included herein within the scope of this disclosure and protected by the following claims.
