| 摘要 |
A folding wheel chock comprises a base plate 9, a wheel support plate 21 pivotally connected about an axis adjacent one end to one end of the base plate 9, and a plate 41, forming a strut member, which is pivotally connected to the end of a said plate, as shown plate 21, remote from the axis. The pivotal connection between plates 9, 21 is provided by punching apertures in parts of the sheet material forming side cheeks 23 of the plate 21 and pressing portions of the sheet material around the apertures, to form respective spigots which are received in apertures punched in side cheeks 11 of the plate 9, alternatively a separate shelf may be used. The pivotal connection between plate 21 and plate 41 is formed by punching an aperture in plate 41 adjacent its upper edge to define, along the upper edge of the plate 41, a shaft portion 45, and by punching out from plate 21 and bending around shaft portion 45 hooks 37; modifications are disclosed. The plates 9, 21, 41 have ribs formed therein by pressing, so that when the chock is folded, by swinging plate 41 up against the underside of plate 21 and then swinging plate 21 down onto plate 9, the plates engage one another firmly to prevent rattling. <IMAGE> |
