JPH0217357Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotation angle setting device, and more particularly to a device for mechanically setting the rotation angle of a rotating body.

Conventional rotating bodies are, for example, 10 rotations and 180 degrees (3780 degrees)
When a motor rotates and then stops, delicate and expensive electronic equipment such as a pulse motor is used to control it. The present invention provides a mechanical device that can set the desired rotation angle in both forward and reverse directions as described above.

Preferred embodiments of the present invention will be described in detail below with reference to the drawings.

In FIGS. 1 and 2, a rotation angle setting device 1 generally shown includes a lead screw 3 having a length corresponding to a desired rotation angle, and is supported at both ends by ball bearings 5, for example, and can be equipped with a brake. It is rotationally driven by a reversing electric motor. If the desired rotation angle is 3780 degrees as described above, the illustrated square screw 7 is provided in a range of about nine and a half pitches.

The nut member 9 which is screwed onto the lead screw 3 described above has a dog 11 projecting from a portion of its outer periphery.

In this embodiment, an actuator rest 17 is fixed on the base 13 and faces the Y-shaped groove 15, and a lead screw 3 is attached to the parallel wall portion of the Y-shaped groove.
A fixed shaft 19 parallel to the is provided.

An actuator 21 is provided which is supported downwardly by the fixed shaft 19 and is swingable around the fixed shaft. It is a protrusion 23 that can be freely engaged and detached depending on the direction of rotation of the lead screw.

An elastic material plate 25 made of, for example, rubber is attached to the surface of the Y-shaped bifurcated part where the actuator 21 comes into contact with the actuator rest 17. A protrusion 27 is provided.

The protrusion 27 passes through the elongated hole 29 of the actuator rest 17 and comes into contact with the actuator 33 of the microswitch 31, as illustrated in FIG.

In this embodiment configured as described above, the first
When the lead screw 3 is rotated in the direction shown by arrow A in Fig. 2 from the stopped state shown in the figure, the actuator 21 has been in the state shown by the two-dot chain line in Fig. During this period, the nut member 9 rotates along with the lead screw 3.

After one rotation of the nut member 9, the dog 11 of the nut member 9 hits the right side of the protrusion 23 of the actuator 21 in FIG. It swings to the state shown by the solid line in FIG.

In this state, the actuator 21 is in soft contact with the surface of the actuator rest 17 via the elastic plate 25, and furthermore, the nut member 9 is restrained from moving around. It is driven by the screw 5 and moves in the direction indicated by A' in FIG.

When the nut member 9 reaches the left end of the square screw 7 provided on the outer periphery of the lead screw 3,
When the nut member 9 changes from a screwed state to an integrated state with the lead screw 3, the dog 11 of the nut member 9 strongly presses the protrusion 23 of the actuator 21, and the protrusion 27 of the elastic plate 25 The actuator 33 of the switch 31 is actuated to issue a signal, and this signal, for example, stops the reversible electric motor with a brake and stops rotation in the A direction.

Next, when rotating in the direction indicated by arrow B in FIG. While swinging to the position indicated by the two-dot chain line and in soft contact with the surface of the actuator rest 17 via the elastic plate 25, the nut member 9 moves in the direction shown by arrow B' in FIG. When the right end of the screw 7 is reached, the micro switch 31 is activated to stop the rotation.

In the above explanation, the rotation angle at which the nut member 9 rotates is approximately one rotation, but as is clear from FIG. Since this amount of deviation can be calculated from the width of the dog 11 and the width of the protrusion 23 of the actuator 21, the length of the square screw 7 to be machined into the lead screw 3 can be calculated precisely. It is. By attaching an annular stopper to the lead screw 3 so that its position can be adjusted and fixed, the movement stop position of the nut member 9 can be arbitrarily set.

The device shown in FIG. 3 is a device for setting forward and reverse rotation around 360 degrees, in which a protruding member 37 having a dog 11 is removably fixed to the outer periphery of a rotating body 35 with bolts, etc., and a shock absorbing elastic member is attached to an actuator rest 17. By abutting the actuator 21 through the member 39, a rotation angle of around 360 degrees is set.

As is clear from Fig. 3, there is a difference of about 8 degrees between the angular position of the rotating body 35 when the actuator 21 is tilted to the left and the angular position when the actuator 21 is tilted to the right, so the rotation angle is set at 368 degrees. , by increasing the width of dog 11.
It can be set to 360 degrees or less.

Rotating body 35, protruding member 37, shock absorbing elastic material 3
The same reference numbers as in FIGS. 1 and 2 are used for parts other than 9.

The embodiment of the present invention described in detail above is capable of setting the end point in both forward and reverse directions using the first actuator when setting a rotation angle of around 360 degrees or more, and uses complicated and expensive electronic equipment. This has resulted in fewer breakdowns and easier maintenance.

[Brief explanation of drawings]

FIG. 1 is a front view of an apparatus according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the - arrow in FIG. Explanation of symbols representing main parts of the drawings: 1...Rotation angle setting device, 3...Lead screw, 9...
... Nut member, 11 ... Dog, 17 ... Actuator rest, 21 ... Actuator, 23 ... Projection, 25 ...
...Elastic material board.

Claims (1)

[Scope of utility model registration request] A lead screw with a length corresponding to the required rotation angle is provided, a nut member screwed onto the lead screw and provided with a protruding dog is provided, the nut member being parallel to the lead screw and facing the lead screw. An actuator rest with an opening groove is provided, and a fixed shaft parallel to the lead screw is provided on the parallel wall portion of the groove, and the dog of the nut member described above pushes around the fixed shaft at a fixed angle. After swinging, an actuator is provided that comes into soft contact with the actuator rest to restrain the rotation of the nut member, and the forcible rotation of the nut member by the end of the lead screw described above operates the actuator beyond the soft contact described above. A rotation angle setting device characterized by being provided with a switch that is activated by pressing against a child rest.