JPH0792128B2 - Elastic support mechanism - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a fulcrum mechanism for general equipment, and a parallelogrammatic link mechanism that always keeps a moving surface parallel to a reference surface. It is related to the fulcrum mechanism of the format.

(Prior Art) Various link mechanisms are known as a mechanism for swinging left and right with a surface that moves relative to a reference surface always held parallel. FIG. 6 shows a parallelogram type four-bar linkage mechanism in which each node is connected by a pin joint fulcrum 7
Is generally used. As another type of link mechanism, for example, as disclosed in Japanese Utility Model Application Laid-Open No. 52-21667, upper and lower horizontal frames are connected via a pin joint by a swing frame arranged diagonally. It is also known that one end of one swing frame can be slid horizontally instead of a pin joint.

(Problems and objects to be solved by the invention) However, in such a conventional four-bar linkage, since a plurality of members are connected by a pin joint, there is rattling and frictional load in those parts, The accuracy of the mechanism is lowered, and it is difficult to swing while maintaining the parallelism.

Therefore, in order to solve such a problem, an object of the present invention is to provide an elastic fulcrum mechanism having a structure in which a parallelogram type link mechanism is formed by pressing and bending one plate member. To propose.

(Means for Solving the Problems) The elastic fulcrum mechanism of the present invention includes a first rigid surface and a first rigid surface that extend vertically apart from each other by pressing and bending one plate-shaped member having elasticity. 2 rigid surfaces are formed, and at least two sets of at least a first rigid portion and a second rigid portion, which are parallel to each other and extend in the front-rear direction and are parallel to each other, are formed so as to be separated from each other in the left-right direction. Even if the rigid portion swings in the front-rear direction with the bent portions at the upper and lower ends of the first and second rigid portions serving as elastic fulcrums,
The parallelogram type link mechanism that always holds the second rigid surface in parallel is adopted.

(Operation) The elastic fulcrum mechanism of the present invention is formed by pressing and bending a single member having elasticity,
Each of the four bent portions formed at the upper and lower ends of the rigid portion connecting the upper and lower rigid surfaces serves as an elastic fulcrum. Therefore, unlike a link mechanism in which each part is connected by a pin joint or a link mechanism using a slide fulcrum, there is no play or frictional load in each node.
Therefore, a mechanism for swinging the first and second rigid surfaces while keeping the first and second rigid surfaces in parallel with each other with high accuracy is realized.

(Example) Below, the Example of this invention is described based on drawing.

FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a development view of the embodiment. The elastic fulcrum mechanism of this example has a second
It is formed by pressing and bending a single plate-like member having elasticity as shown in the figure.

As shown in FIG. 1, in the formed elastic fulcrum mechanism of this example, the upper rigid surface 3 is kept parallel to the lateral direction as the reference surface at the position where the lower rigid surface 4 is fixed. It can swing. That is, the upper ends of the rigid portion 5 and the rigid portion 6 are continuous with the upper rigid surface 3 via the elastic portions 1 functioning as elastic fulcrums, respectively. The lower ends of these rigid portions 5 and 6 also have elastic portions 2 that function as elastic fulcrums.
Through the lower rigid surface 4 respectively. The bending angles of the upper and lower elastic portions 1 and 2 are the same, and the bending directions are only upside down. Further, the rigid portions 5 and 6 are set to have the same length. Therefore, the rigid portions 5 and 6 are arranged in parallel with each other, and function as a swing arm that swings left and right while holding the upper and lower rigid surfaces 3 and 4 in parallel.

In this example, two sets of the rigid portions 5 and 6 arranged in parallel in the swing direction (front-back direction) are formed in the direction orthogonal to the swing direction (left-right direction). There may be three or more sets. In addition to the rigid parts 5 and 6, it is of course possible to further dispose a third rigid part on the front or rear side. In this example, the rigid surface 3 is arranged on the upper side and the rigid surface 4 is arranged on the lower side, but the vertical relationship between them is relative. Furthermore, when these rigid surfaces 3 and 4 are arranged vertically, the rigid portions 5 and 6 connecting them are arranged in the lateral direction. As described above, the up / down and left / right relations of the respective parts are for showing the relative positional relations based on one component of the link mechanism, and the positional relation of the respective parts of the present invention is unique. Is not intended to be defined as.

In addition, in this example, the rigid surfaces 3 and 4 are bent at right and left sides, respectively, to increase the rigidity in the out-of-plane direction. Similarly, the rigid portions 5 and 6 are also formed by bending the inner side surfaces at a right angle to increase the rigidity in the out-of-plane direction. Therefore, the rigid surfaces 3 and 4 and the rigid portions 5 and 6 are the elastic portions 1 and 2 that are bent portions.
The out-of-plane rigidity is remarkably larger than that of, and therefore, the elastic portions 1 and 2 reliably function as elastic hinges.

FIG. 3, FIG. 4 and FIG. 5 are schematic side views showing the movement of the elastic fulcrum mechanism of this example. The state shown in FIG. 3 and the fourth
During the state shown in the figure, the rigid surfaces 3 and 4 oscillate while being held in parallel. Note that FIG. 5 is a side view of the state viewed from the side opposite to FIG.

INDUSTRIAL APPLICABILITY The elastic fulcrum mechanism of the present invention can be used as a fulcrum mechanism of equipment that requires high accuracy, such as wire bonding.

(Effects of the Invention) As described above, according to the present invention, the simple process of pressing and bending one plate-shaped member is inexpensive, and rattling and frictional load are applied to each node. It is possible to form a parallelogram type link mechanism that does not exist. Therefore, it is possible to realize an elastic fulcrum mechanism that can be moved with high accuracy while holding parallel surfaces in general equipment.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a developed view of the embodiment, FIGS. 3, 4, and 5 are schematic side views showing the motion of the embodiment, and FIG. The figure is a partial schematic view showing a conventional link mechanism. 1, 2 ...... Elastic part 3, 4 ...... Rigid surface 5, 6 ...... Rigid part 7 ...... Pin joint

Claims (1)

[Claims] 1. A plate-shaped member having elasticity is pressed and bent to form first and second rigid surfaces which are vertically separated and extend in parallel, and are connected to each other. At least two sets of at least first and second rigid portions extending in parallel in the front-rear direction are separated from each other in the left-right direction, and the rigid portions are bent in the front-rear direction with the bent portions at the upper and lower ends of the rigid portions as elastic fulcrums. An elastic fulcrum mechanism characterized in that a parallelogram type link mechanism is formed which always keeps the first and second rigid surfaces parallel to each other even when swinging.