| 摘要 |
A clamping apparatus of type to be used for clamping picture frames or the like is characterized by the speed and simplicity of operation and its ability to quickly accommodate frames of different sizes. Structurally, the preferred embodiment includes a first member, a first arm member pivotally attached to the first member, first corner confinement structure for abutment with a first corner of a frame and pivotally attached to the first arm member, a second arm member pivotally attached to the first member, second corner confinement structure for abutment with a second corner of the frame and pivotally attached to the second arm member, a second member, a third arm member pivotally attached to the third corner confinement structure for abutment with a third corner of the frame and pivotally attached to one end of the third arm member, a fourth arm member pivotally attached to the second member and pivotally attached to one end of the fourth arm member, and a mechanism for adjusting the position of the second member with respect to the first member whereby the first, second, third and fourth corner confinement structures will securely hold all parts of the frame tightly together when the adjusting mechanism is used to move the first and second members towards each other.
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