JPS6029024B2 - Compound rotation mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a compound rotation mechanism that rotates and linearly moves a shaft using one simple drive source, and is designed to simplify the structure and shorten the operating time.

Composite turning mechanisms are often used for turning parts, feeding devices, etc., but turning and linear movement are generally performed by separate drive sources, making the structure complex and requiring timing for long-distance movements. It was troublesome to remove, and malfunctions and breakdowns were likely to occur. Mechanisms that perform compound rotation using a single drive source have also been proposed, but these have a special or complicated configuration and are not universally applicable.

The present invention was proposed in view of these points, and uses a pinion as a drive source, and rotates the pinion and housing coaxially on the base in order to rotate and move the rattan in a straight line simply by rotating the pinion with a motor etc. The shaft is freely pivoted, the operating shaft is slidably supported on the housing, the housing and the operating shaft are biased by an expansion spring, the rack provided on the operating shaft is engaged with the pinion, and the housing is provided with a rotation locking member. The structure in which the housing and the base area are provided between separate fixed parts allows reliable compound rotational movement.

One embodiment of the present invention will be described below with reference to the drawings.
In Figure 3, a shaft 5 is rotatably supported on one side of the upper part of the base 3, which is fixed to a device, etc., and perpendicular pins 81 and 82 are fixed on the top of the other side and on the lower side of the ratchet 5 side. It is shielded.

Further, an arc-shaped notch 3a is formed in the base body 3 with the shaft 5 as the center, and a key member 6 is provided on the shaft 5 at the position of this notch 3a.
The housing 2 includes a pinion 4 integrated with the shaft 5 and a support portion 2a of the housing 2 which is rotatably mounted on the shaft 5. The housing 2 is formed with a shaft hole 2b, through which the operating shaft 1 is slidably inserted.
a is meshing with pinion 4. A coil spring 7 is wound between the housing 2 and the operating shaft 1, and is biased to expand. On both sides of the housing 2 are the perforation pins 8.
Pins 83 and 84, which correspond to 1 and 82, are fixed.
In the operation of the above configuration, the housing 2 etc. are located at the position shown in the first figure in a normal state.

When the pinion 4 is rotated via the shaft 5 by a driving source such as a motor (not shown), the driving force is transmitted to the operating axis I via the rack la, and the operating shaft 1 and pinion 2 are moved to the position indicated by the two-dot chain line in FIG. The housing 2 stops when the pinion 4 and the pinion 4 rotate integrally until the rotation pin 84 hits the rotation pin 82. When the pinion 4 further rotates, the operating shaft 1 releases the spring 7 and performs a downward linear movement. Next time to return, pinion 4
When it is reversed, the moving ball 1 is raised and the housing 2 is rotated in the reverse operation to the above, and the rotation is stopped when the perpendicular pins 81 and 83 come into contact with each other.

Therefore, if a suitable chuck member is attached to the tip of this operating shaft, rotational transfer and supply of parts can be carried out reliably. Since this mechanism operates smoothly by driving the pinion 4, it can perform fast operations reliably and smoothly, and is suitable for short tacts. However, in this case, when the pinion 4 reverses, the operating axis 1
The operation timing of the rise (backward return) and the rotation of the housing 2 is related to the expansion force of the spring 7, which is in decline, but the housing 2 is rotated while the operating shaft 1 is rising.
The operation timing differs during the round trip. This is because when the operating shaft 1 rises due to the reversal of the pinion 4, the housing 2 is stopped by the strong expansion force of the spring 7, but since the spring force of the spring 7 decreases during the ascent, the operating shaft 1 is at the rising end. The housing 2 tends to start rotating before the rotation occurs, and the timing (reciprocating trajectory) is unstable. This timing is stabilized in the modified example shown in the fourth figure, in which a stopper 10 is added to the configurations of the first to third illustrated examples. The joining part 10a faces the corner part of the base body 3 so as to be freely engageable and detachable. On the other hand, screw pins 11 and 12 are provided on the lever 9 fixed to the operating shaft 1 so as to move forward and backward with the stopper 10 interposed therebetween. FIG. 4 shows a state in which the housing 2 is rotated and the operating shaft 1 is lowered, and at the end of this downward movement, the screw pin 11 pushes down the stopper 10, causing the engaging stepped portion 10a to engage with the corner of the base 3, causing the housing 2 to rotate. is held unrotatable. If the pinion 4 is now reversed, the housing 2 cannot be rotated, so the operating shaft 1 will rise, and the screw pin 12 will rise together, and at the end of the rise, the screw pin 12 will push the stopper 10 up to the position shown by the two-dot chain line. out of alignment. Therefore, the housing 2 can be rotated, and when the pinion 4 is reversed, the housing 2 is rotated and stopped at the first illustrated position to complete the operation, so that approximate timing can be set for reciprocating. The reason why the screw pins 11 and 12 are provided so as to be able to move forward and backward is to facilitate timing setting and adjustment.
In addition, in the above example, a rotation regulating member is used as a rotation regulating member, but the purpose of the regulation part can be changed if it performs a rotation function, so for example, if a part of the housing is made a rotation regulation member, a separate rotation regulating member can be used. There is no need to provide As is clear from the above, in the present invention, a rack is provided on the operating shaft movably supported in the housing, and this rack is meshed with the pinion supported on the base, so that the combined operation of rotation and linear movement can only be performed by rotation of the pinion. The structure is simple, the number of parts is small, and the mechanism can be provided at low cost.Also, the operation can be performed mechanically without strain, and even if the operation time is shortened (short tact), it can operate reliably and fail. It has a variety of effects, such as being less likely to occur.

An application of the present invention in which a chuck is attached to the tip of the operating shaft
To explain an example with reference to FIG. 5, a chuck plate 20 is fixed to the tip of the operating shaft 1, and a pawl 21 is rotatably supported on the chuck plate 20.
A connecting plate 22 is rotatably provided between the three.

The piston rod 23 is a rod of a fluid cylinder 24 housed in the operating shaft 1, and the vertical movement of the rod 23 causes the pawl 21 to move.
The cylinder moves to close and open, and if the cylinder is operated in conjunction with the descent of the operating shaft 1, the claws 21 will chuck the component W, and if the cylinder is operated in reverse when the operating shaft 1 returns, the claws 21 will release the component W. , the component W can be rotated and fed multiple times. Of course, various types of chucks can be used.

This mechanism can also be applied to mechanisms other than chucks.

[Brief explanation of the drawing]

Fig. 1 is a side view of one embodiment of the present invention, and Fig. 2 is its A-A
3 is a sectional view taken along the line B-B in FIG. 1, FIG. 4 is a side view of a modified example, and FIG. 5 is a configuration diagram of main parts of an applied example. 1 is an operating axis, 2 is a housing, and 3 is a A base body, 4 a pinion, 7 a coil spring, and 10 a stopper. Figure 2 Figure 3 Figure 4 Figure 4

Claims (1)

[Scope of Claims] 1. A housing and a pinion are rotatably coaxially supported on a base body, a rotation regulating portion of the housing is provided on the housing and a fixing member, and an operating shaft is slidably supported on the housing. , a compound rotation mechanism configured such that a rack provided on the operating shaft is engaged with the pinion, the housing and the operating shaft are biased by an expansion spring, and the operating shaft is rotated and linearly moved by rotation of the pinion. . 2. Use a separate perforation pin as the rotation regulating part of the housing,
A compound rotation mechanism according to claim 1, which is provided on a housing and a base body.