| 摘要 |
<p>A first plate is provided and a second plate is disposed generally normal and secured to the first plate centrally intermediate opposite marginal portions thereof with the second plate projecting outwardly from a first side of the first plate and disposed normal to a path extending between the opposite marginal portions of the first plate. An elongated abutment member including opposite end portions and intermediate portion extending between the opposite end portions is provided and the end portions of the abutment member are offset to one side of the intermediate portion thereof. The intermediate portion of the abutment member has a central opening formed therethrough and the second plate includes an elongated endwise outwardly projecting mounting portion on its outer end remote from the first plate. The abutment member is mounted on the mounting portion with the latter loosely received through the central opening and the aforementioned one side of the intermediate portion opposing the aformenentioned first side of the first plate for movement of the abutment member on the mounting portion toward and away from the first plate and the limited angular displacement of the abutment member relative to the mounting portion about an axis generally paralleling the plates. Adjustable displacement means is operatively connected between the mounting portion and the abutment member intermediate portion for adjustable displacement of the abutment member along the mounting portion toward the first plate. Adjacent marginal edges of tabletops may be clamped between the opposite ends of the first plate and the opposite ends of the abutment member, on opposite sides of the second plate, with the surfaces of the tabletops opposing the aforementioned first side of the first plate disposed substantially co-planar.</p> |
