GB2274423A

GB2274423A - Folding work trestle

Info

Publication number: GB2274423A
Application number: GB9301078A
Authority: GB
Inventors: Danny Graham Oke
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-01-20
Filing date: 1993-01-20
Publication date: 1994-07-27
Anticipated expiration: 2013-01-20
Also published as: GB9301078D0; GB2274423B

Abstract

A work trestle that folds flat for storage and conveyance comprises folding legs (14) which are locked into position by a sliding rectangular collar (13). A work top (10) and a movable section (12) can be used to stand upon or when used in conjunction with screw threads (11) and handwheel nuts (15) can be used as a clamp. The sliding rectangular collar (13) can be used as an intermediate step. Bodily weight can be applied to the sliding rectangular collar (13) to stabilise the trestle when vigorous effort is being applied to the work piece held in the clamp facility. <IMAGE>

Description

A FOLDING STAN-ON WQRK TRESSSE, This invention relates to a folding stand-on work tressle.

Work tressles are a useful item of equipment for many of the trades associated with the building industry. There are two main categories of tressle.

(I) The rigid, narrow topped variety suitable for a. limited range of functions, and equally restricting in the size of material that they can accommodate with safety. The narrow top of the rigid tressle can be used for standing upon, but care and balance are needed.

(2) The other variety of tressle is the folding type with a welder work top usually incorporating a clamping device for holding the material to be worked. The clamp is operated by one or more rotating screw threads which are individually operated by means of a handle on the outside edge of the work top itself, This type of tressle is generally unsuitable for standing upono Thi6 invention provides for a robust wide topped tressle that folds to a compact size for storage and transportation. On its top it incorporates a centre section which is free moving on two screw thraads which themselves form part of the tressle structure. Each thread is fixed and therefore static.On each thread there is fitted a hand operated rotating wheel nut that when turned clockwise drives the free moving centre section in the manner of a vice or clamp. The folding pairs of legs at either end of the tressle, and which are of identical dimensions, open outwards and are locked in the operating in the operating / position by a rectangular sliding collar.

In the storage mode this collar fits around the outside of the tressle's work top and is level with the working surface.

In the working mode the rectangular sliding collar has two functions: (I) Firstly when it is locked into position on the two pairs of folding legs it provides an intermediate step prior to standing on the top surface.

(2) Secondly it provides an area of the tressle to which bodily pressure can be applied to further stabilise the tressle when vigorous work such as planing or sawing is being performed.

A tray for work tools is incorporated within the structure of the sliding rectangular collar.

A specific embodiment of the invention will now be described by way of example with reference to the accompanying drawing in which: Fig:I Illustrates in perspective the tressle with the sliding collar shown locked in the work mode, and the free sliding centre section shown centralised on the two screw threads.

Fig:2 Shows the tressle when viewed from directly above whilst in the storage mode with the sliding collar in position around the out side of the working top. The free sliding centre section is shown centralised on the centralised on the / two screw threads.

Fig:3 Shows the tressle in the work mode when viewed from end on Fig:4 Shows the tressle in working mode when viewed from side on.

Fig:5 Shows the tressle's folding action when viewed from side on with the tressle turned upside down. One pair of legs are shown folded.

The other pair of legs illustrate the folding movement. The alternated hinge arrangement is also shown.

Fig:6 Shows in perspective the folding leg arrangement. Also shown are the two screw threads with the wheel nuts thereon and the free moving centre section is shown in the centralised position on the work top.

eferring to the drawing, the work tressle comprises of the two parts of the fixed work top 10 with the two screw threads II which form part of the work top construction and upon which moves the free moving centre section I2. The rectangular sliding collar 13 is fitted around the outside of the fixed work top 10 when in the storage mode as shown in Figr2, Figs59 Fig:6.

Tg convert from storage mode to work mode place the tressle in the folded condition, upside down as in Fig:5, and raise both pairs of folding legs 14. Turn the tressle over and tressle over and / stand it upon the unfolded legs I4 and lower the rectangular sliding collar 13 into the locking position on each of the two pairs of folding legs I4 as shown in Fig:I, Fig:3, Fig:4, To use the tressle top as a clamp place the tressle in the work mode as shown in Fig:I, Fig:3, Fig:4.Rotate the two handwheel nuts I5 in an anti-clockwise direction away from the free moving centre section I2 until the limit of the screw thread II is reached, The free noving section I2 can now be manually moved to the required aperture to accommodate the piece of work to be held between itself I2, and the inner edge oEFthe fixed work top IO. The handwheel nuts I5 are now rotated clockwise on the screw threads II towards the free moving centre section I2 and drive it over the screw threads II, to firmly clamp the work piece between itself I2 and the inner edge of the fixed work top IO.

To use the tressle to stand upon, place the tressle in the mode as shown in Fig:I, Fig:3, Fig:4, and manually centralise the free moving centre section I2 on the screw threads II between the two fixed surfaces of the work top IO. The sliding rectangular collar 13 when in the locked position as shown in Fig:I, Fig:3, Fig:4, may be used as an intermediate step to assist in mounting the tressle.

To return to the storage mode as shown in Fig:2, the assembly steps are carried out in reverse sequence.

Claims

CLAIMS.

lo A folding stand-on work tressle with a wide top. Lockable folding legs at each end. Rectangular sliding collar to lock legs in the work mode. Free moving centre section on two fixed screw threads each of which is fitted with a handwheel nut, Free moving centre section which can be driven over the screw threads by the rotational action of the handwheel nuts and used as a clamp.

e A folding stand-on work tressle as claimed in Claim I wherein the sliding rectangular collar fits around the outside of the wide work top when folded and becomes an intermediate step by way of which to ascend onto the tressle and stand on the top when it is locked in the work mode A folding stand-on work tressle as claimed in Claim I or Claim 2 whereon the two screw threads on the wide work top section are an integral part of the tressle construction.

These two screw threads prove support for the free moving centre section when it is used as a clamp or when used for standing upone