| 摘要 |
The accessory mounting [P.28/29,Fig.9d[ii]] comprises a securable attachment devicejprincipally front-loading, comprising two horizontally connected pairs of vertically [with respect to a standing ladder] connected and extendible diverging rung- gripping hooks,incorporating a horizontal member,the mid-section of a toolbar with attached arms extending into the horizontal [Fig.9d[ii], 26b,26c,2 [Ui]514a]. Struts[Fig.9d[ii],18] stemming from the attachment device [Fig.9d[ii],la,27d,] connect with a cross-member joining the arms[Fig.9d[ii],14a,18,18a,17,17a ] which have the means to co-jointly mount adapted ladder accessories[Fig.9d[ii],14e]. To maximise functionality,the arms can vertically rotate selectively within the horizontal plane of a standing ladder,with a capacity for limited free rotation[Fig.9d[ii],2[iii],15d,15c],project into the horizontal at selected angles[Fig.9d[ii],14],and are adjustably extendable[Fig.9d[ii],14a,14e],the toolbar shortened [Fig.9d[ii],2[iii],2[i]a,2[i]b],the struts extendable and pivotal[Fig.9d[ii], 18, 18b, 18c, 18d, 18e]and the cross-member[Fig.9d[ii], 17, 17a] extendable. To ensure symmetrical attachment,the apparatus has a centering mechanism[Fig.9d[ii],3]. The apparatus can be stored in a toolbox which converts into a work surface and loading trestle. |
