초록 ▼

A device for erecting roof comprises a portable platform of a size and weight easily lifted and manipulated by a single worker. The platform is configured to fit over the upper ends of the chords of a truss that has already been secured in place so that it can support a worker. By using a pair of th

A device for erecting roof comprises a portable platform of a size and weight easily lifted and manipulated by a single worker. The platform is configured to fit over the upper ends of the chords of a truss that has already been secured in place so that it can support a worker. By using a pair of the devices, the worker can move from truss to truss, from one end of the roof to the other. The worker moves the device that is not currently in use from one truss to the truss that he has just finished securing in place, and then steps from the device currently in use onto the other device so that the worker is supported on the newly secured truss, in position to guide a new truss into position so that it can be secured. This process is repeated until all trusses have been secured.

대표청구항 ▼

1. A device facilitating the erection of trusses of a building roof frame, comprising:a base for a worker to stand on;a pair of support arms attached to the base and extending upwardly therefrom and terminating at upper ends of the support arms, the attachment between the support arms and the base b

1. A device facilitating the erection of trusses of a building roof frame, comprising:a base for a worker to stand on;a pair of support arms attached to the base and extending upwardly therefrom and terminating at upper ends of the support arms, the attachment between the support arms and the base being such that when the support arms are vertical in side view the base is horizontal so as to provide a platform for the worker to stand on;wherein the base is pivotally attached to the support arms such that the base is pivotable about a horizontal axis between a working position in which the base is horizontal and a storage position in which the base is generally vertical, and further comprising an arrangement for holding the base in the working position against the weight of a worker standing thereon; anda truss grip connected to the upper end of each support arm, the support arms and truss grips being configured such that one of the truss grips is adapted to fit closely over one chord of a truss on one side of a peak thereof and the other truss grip is adapted to fit closely over another chord of the truss on an opposite side of the peak, thereby suspending the base from the truss and positioning the base in a horizontal orientation, the device being structured and arranged such that the device holds the base horizontal against the weight of a worker standing thereon using only the chords as support. 2. The device of claim 1, wherein the arrangement for holding the base in the working position comprises braces connected between the base and the support arms. 3. The device of claim 2, wherein the braces comprises two-bar linkages. 4. The device of claim 2, wherein the braces comprise flexible support members. 5. The device of claim 4, wherein the braces comprise chains. 6. The device of claim 1, wherein the arrangement for holding the base in the working position comprises a stop positioned to prevent pivotal movement of the base past the horizontal working position. 7. The device of claim 1, wherein each truss grip is attached to the respective support arm such that the truss grip is pivotal about a horizontal axis relative to the support arm so as to accommodate roof trusses of various pitches. 8. The device of claim 1, wherein the truss grips are separately formed from the support arms and are subsequently joined to the support arms. 9. A method for erecting roof trusses atop a building structure, comprising the steps of:suspending a first support platform from a first truss erected atop the building structure, and standing on the first support platform while fixing a second truss atop the building structure adjacent to and spaced from the first truss;suspending a second support platform from the second truss, and climbing from the first support platform onto the second support platform and standing on the second support platform while fixing a third truss atop the building structure adjacent to and spaced from the second truss; anddisengaging the first support platform from the first truss and suspending the first support platform from the third truss, the first and second support platforms thus being alternately used for erecting trusses one after another.