JPS6114735Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a connection structure that connects a plate member such as a lever and a shaft having a circular cross section in a relatively non-rotatable manner.

In the case of a structure in which a shaft with a circular cross section is connected to a plate material, such as a lever, the shaft is likely to slip, and for this reason, various connection structures have been proposed in the past. For example, a plate material is bent into a U-shape surrounding the outer periphery of the shaft, a through hole is provided in both sides to allow a screw to pass through, and both ends of the screw are fixed so that they cannot escape. There was one in which a flat part was provided on the outer periphery of a part of the board, and a plate material was placed in contact with this plan view and fixed with screws.

However, with either structure, machining is difficult, and the screw is screwed through or toward the center of the shaft, so in order to increase the bonding force between the two, the diameter of the screw must be increased. As the diameter of the screw was increased, the strength of the shaft was weakened.

Therefore, the purpose of the present invention is to create a connection structure that has a simple structure, which has a strong connection between a shaft with a circular cross section and a plate material (for example, a lever), which can stably transmit rotation without weakening the strength of the shaft. Our goal is to provide the following. Embodiments of the present invention will be described below with reference to the drawings.

A pair of linear locking grooves 2 and 3 are bored along the radial direction on the outer periphery of the shaft 1 having a circular cross section at regular intervals. The width of the locking grooves 2 and 3 is such that a plate material such as a lever 4 can be fitted therein, and the depth of the locking grooves is set to such an extent that the strength of the shaft 1 is not weakened. The shape of the bottom surfaces 2a, 3a of the locking grooves 2, 3 may be flat as shown in the drawings, or may be non-circular with respect to the center of rotation of the shaft 1, such as a chevron, concave, or zigzag surface.

Further, one end of the lever 4 is bent into a U-shape to serve as a fixed part, and the shape of this fixed part is made up of a parallel piece formed in parallel and a connecting piece 5 that connects both parallel pieces. A through hole 6, which is large enough to allow the shaft 1 to pass through, is provided in both parallel pieces.
7 has been opened. And in the through holes 6 and 7,
The edges on the opposite side of the connecting piece 5 are linear locking edges 6a, 7a that fit into the locking grooves 2, 3, and the end surfaces of these locking edges are the bottom surfaces of the locking grooves 2, 3. 2a, 3a
It is formed in a shape that allows it to come into contact with. A set screw 8 is screwed into the connecting piece 5.

By the way, in order to connect the shaft 1 and the lever 4, the shaft 1 is passed through the through holes 6 and 7, the locking edges 6a and 7a are fitted into the locking grooves 2 and 3, and the set screw 8 is screwed in. The tip of this screw presses the outer periphery of the shaft 1. As a result, the locking edges 6a, 7
The end face of a is pressed tightly against the bottom faces 2a and 3a of the locking grooves 2 and 3, and the shaft 1 and lever 4 are
Strongly connected. Furthermore, by matching the width of the locking grooves 2 and 3 to the thickness of the locking edges 6a and 7a so that they fit snugly, the connection between the shaft and the lever 4 will be even stronger. .

As described above, according to the present invention, the connection between the shaft having a circular cross section and the plate material such as the lever is strong, rotation can be transmitted stably, and the structure is simple, so the practical effects are great.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway front view, Figure 2 is Figure 1-
FIG. 1... Shaft, 2, 3... Linear locking groove, 4... Plate material, 5... Connecting piece, 6, 7... Through hole, 6a, 7a
... Straight locking edge, 8 ... Set screw.

Claims (1)

[Claims for Utility Model Registration] The ends of the plate are bent to form a fixing part with a U-shaped cross section, and a through hole through which a shaft with a circular cross section can pass is formed in both parallel pieces of the fixing part. , A linear locking edge is formed in the through hole on the opposite side of the connecting piece that connects the parallel pieces, and a pair of linear locking grooves are formed at a constant interval on the outer periphery of the shaft. , a connection structure between the plate and the shaft, which is constructed by fitting the linear locking edge into the linear locking groove, and screwing a set screw that presses the shaft into the connection piece. .