Abstract: A case has an engagement hole formed in a side surface thereof in the width direction, a cover has a projecting piece formed thereon, the projecting piece projecting toward the case side, and a tip portion of the projecting piece is fitted into the engagement hole from the inside. A reset bar has a recessed portion formed in a preset range extending in the depth direction and the circumferential direction within the outer peripheral surface of the reset bar and, when positioned at either an initial position or an automatic reset position, prevents the tip portion from being pushed inside by having the outer peripheral surface opposed to the back side of the projecting piece. In addition, when positioned at a manual reset position, the reset bar allows the tip portion to be pushed inside by having the recessed portion opposed to the back side of the projecting piece.

Abstract: An apparatus includes a frame for receiving a pallet therein. A supporting member is operatively connected to the frame so as to be horizontally slidable in a fore-and-aft direction with respect to the frame. The supporting member is positioned at a level which is higher than the plates which are generally vertically stood on the pallet. A plurality of vertical elongate members are secured to the supporting member so as to be horizontally slidable along a major surface of the supporting member in a lateral direction. Each elongate member is vertically telescopic and has a axially extending opening formed therein in which the spacer can be received. A pair of rollers are rotatably mounted on a top of each elongate member for guiding the spacer into the opening and lowering the spacer to a first position adjacent a major surface of a first plate which is generally vertically stood on the pallet.