JPH0143571Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is applicable to a reciprocating machine such as that disclosed in Japanese Patent Publication No. 47-12901, in which the speed of the casing can be arbitrarily set by arbitrarily adjusting the tilting angle of the driven rotating ring. It relates to a device that can

Conventionally, when setting the tilting angle of a driven rotary ring, as disclosed in the above-mentioned patent publication, the tilting angle of a plurality of driven rotary rings is arbitrarily set by meshing gears, or In addition, as shown in FIG. 1, a tilting arm 3 is fixed to the end of the tilting shaft 2 of the driven rotating ring 1 located at the center, so that the adjacent driven rotating rings 1 and 4, 1 and 5 are symmetrical to each other. In order to control the swing width of the tilting arm 3, that is, the inclination angle of the driven rotation ring 1, it is connected by a link mechanism so as to be linked to the position, and is rotatably supported on the housing 6, and a reverse thread is carved from the center thereof. The nuts 8 and 8' are screwed onto the respective screws of the screw shaft 7, and the interval between the nuts 8 and 8' is increased or decreased by rotating the screw shaft 7, and the tilting arm 3 is brought into contact with the nut 8 or 8'. I am making contact and setting the speed.

However, in the conventional example described above, the accuracy of setting the inclination angle of the driven rotating ring is reduced due to the backlash of the gear, and the latter is unstable in maintaining the spacing between the nuts due to loosening of the nuts. Because the interval between and the setting speed changes during the reciprocating movement of the housing 6, it is difficult to maintain the symmetry of the inclination angle of the driven rotating ring in both the outward and return trips. The disadvantage was that the speed settings could not be operated simultaneously with high precision. In FIG. 1, reference numeral 9 denotes a rotational drive shaft that penetrates the inside of the housing 12 and is pressed against a portion of the inner circumferential surface of the driven rotation rings 1, 4, and 5.

The present invention eliminates the drawbacks of the conventional speed setting device described above, and an embodiment of the present invention will be described below with reference to Figures 2 to 6. 12 is inserted into the housing 13, the tilting shafts 14', 1 of the holding members 14, 15, 16 of the driven rotation ring L are inserted.
5', 16' are rotatably supported, and each holding member 14, 15, 16 is connected to a link plate 17 shown by a phantom line.
The adjacent holding members are interlocked and connected by pins P ₁ , P ₂ , and P ₃ so as to tilt symmetrically with respect to each other.

Further, an eccentric rotation shaft 18 for regulating the tilting angle in a direction perpendicular to the rotary drive shaft 11 is disposed near the central holding member 15, and the eccentricity δ of the eccentric rotation shaft 18 is set in the vicinity of the holding member 15.
5 is perpendicular to the rotary drive shaft 11, that is, a part of the inner peripheral surface of the driven rotary ring L held by the holding member 15 is perpendicular to the outer peripheral surface of the rotary drive shaft 11, and the transmission from the rotary drive shaft is The position at which the casing 13 is stopped with zero component force in the direction of the rotation drive shaft 11 and the maximum value of the inclination angle of the holding member 15 are regulated to maximize the oblique angle of the driven rotation ring L with respect to the rotation drive shaft. The amount of tilting of the holding member 15 can be changed and adjusted between the position where a component force of the maximum movement speed in the rotational driving direction is applied to the housing 13, and the holding member 15 supports one end of the eccentric rotation shaft 18. The support shaft 18' is the third
As shown in the figure, a rotary operation plate 19 is fixed by penetrating the side wall of the casing 13, and a setting pin 20 that can be retracted and retracted is inserted through the operation plate 19. It is inserted into pin holes drilled in the shape of an arc at equal intervals on the outer wall surface, and the pin holes include, for example, 1,
Codes such as 2, 3, etc. are displayed.

Further, a support shaft 18'' that supports the other end of the eccentric rotating shaft 18 is eccentrically attached to a fine adjustment ring 21 that is rotatably fitted to the side wall of the housing 13. The position is held by pressing with the tip of a push pin 22 screwed into the bottom wall of the housing 13, and the groove 23 carved in the ring 21 is a locking groove for a tool for rotating the ring.

The eccentric rotation shaft 18 is provided with a plurality of small diameter portions 25 having inclined cut surfaces 24 at symmetrical positions from the center of the shaft toward the ends of the shaft. The sides are designed so that they come into contact with each other when tilting.

A switching arm 26 is loosely fitted to the end of the tilting shaft 15' of the central holding member 15 protruding from the bottom wall of the casing 13, and a tilting arm 27 is fixed thereto. 26' and the tip pin 27' of the tilting arm 27 are tension springs 28 that have a toggle effect.
The free end of the switching arm 26 has a pair of stoppers S spaced apart from each other on the bottom wall of the housing 13.
A pin 29 is protruded to abut against S' and a pair of strikers T and T' provided at the ends of the reciprocating movement of the housing, and the tilting arm 27 is held at the center by the biasing force of a tension spring 28. The member 15 is pressed against the inclined cut surface 24 of the eccentric rotation shaft 18.

A pair of guide rollers 30 are provided on the inner wall of the housing 13 to sandwich the reciprocating guide shaft 12 from above and below.

Therefore, parts of the inner circumferential surfaces of adjacent rings of the driven rotary rings L held by the holding members 14, 15, and 16 are alternately pressed against the outer circumferential surface and the lower part of the rotary drive shaft 11, so that the rings L are By intersecting the axis of the rotary drive shaft 11 obliquely, the housing 13 moves along the rotary drive shaft 11 like a nut screwed onto the rotary screw shaft, and the switching arm 26 is moved at the end of the movement. The protruding pin 29 at the tip presses against the striker T or T' and switches the switching arm 26 to the opposite position against the biasing force of the tension spring 28. As a result, the driven rotation ring is reversed and tilted to the symmetrical position. When crossed, the direction of movement of the housing is switched to the opposite direction.
Due to the tension spring 28, a part of the peripheral edge of the central holding member 15 is always aligned with the eccentric rotation axis 18 as shown in FIG.
By pressing against the holding member 15 and rotating the rotation operation plate 19, the eccentric rotation shaft 18 changes its inclination angle according to the amount of rotation of the rotation operation plate 19 with the holding member 15 centered around the tilt axis 15'. The holding members 14 and 16 are also connected to the link plate 1
7, the inclination angle is changed to a symmetrical position, and the reciprocating speed of the housing 13 is adjusted to increase or decrease in accordance with the inclination angle.

Therefore, by rotating the rotary operation plate 19 to a position where the desired inclination angle is obtained and fixing it with the setting pin 20, the reciprocating speed of the housing 13 can be set as desired. By slightly rotating the eccentric rotation shaft 18, the axis of the eccentric rotation shaft 18 is slightly tilted, and the inclination angle of the holding member 15 can be finely adjusted.

Furthermore, even if the holding member 15 is reversed counterclockwise from the inclined position shown in FIG. 2, the symmetrical peripheral edge portion of the holding member 15 will come into contact with the eccentric rotation shaft 18.
Since the driven rotating ring can always maintain a symmetrical posture when reversing at the end of the reciprocating motion, the reciprocating speed of the housing can be maintained at the set value, and the accuracy of the set speed can be improved by rotating the fine adjustment wheel. This can be further improved.

Furthermore, since the small diameter portion 25 of the eccentric rotation shaft 18 is provided at a symmetrical position, when changing the mounting location of the rotation operation plate 19 to the opposite wall surface of the casing, the eccentric rotation shaft 18 can be moved from the position shown in FIG. There is an advantage that even if the holding member 15 is installed in the position shown in FIG. 6 by being reversed by 180 degrees, there is no problem in adjusting the inclination of the holding member 15.

Furthermore, the tilting angle of the driven rotation ring is restricted.
Since this is done by pressing the driven rotating ring directly against the eccentric rotation shaft, the structure of the tilting angle regulating means for the driven rotating ring is simplified, and since no gears or nuts are used as the regulating means, backlash and There is no loosening of nuts, etc., and the tilting angle can be reliably regulated to improve the accuracy of reciprocating speed.

[Brief explanation of the drawing]

Fig. 1 is a front view of a conventional case, Figs. 2 to 6 show an embodiment of the present invention, Fig. 2 is a plan view showing the inside of the case, Fig. 3 is a front view of the case, and Fig. 4 is a front view of the case. back view of the housing,
5 is a left sectional view of FIG. 3, FIG. 6 is a left sectional view of the rotary operation plate attached to the rear surface of the housing, and FIG. 7 is a bottom view of FIG. 6. 11...Rotation drive shaft, 12...Reciprocating guide shaft,
13... Housing, 14, 15, 16... Driven rotating ring holding member, L... Driven rotating ring, 14',
15', 16'...Tilt axis, 17...Link board, 1
8...Eccentric rotation shaft, 19...Rotation operation plate, 21...
...Fine adjustment wheel.

Claims (1)

[Scope of utility model registration request] A reciprocating guide shaft and a rotary drive shaft are spaced parallel to each other and inserted into the housing, and a plurality of driven rotation rings having an arcuate bulging inner peripheral surface are rotatably and tiltably operated within the housing. A part of the arc-shaped bulging inner peripheral surface of the driven rotation ring is pressed against the outer periphery of the rotation drive shaft, and the casing is moved along the reciprocating guide shaft by reversing the tilting angle of the driven rotation ring. In the reciprocating actuator, an eccentric rotation shaft is provided in the vicinity of the driven rotation ring and supported by the housing to regulate the tilting angle of the driven rotation ring, and one end of the eccentric rotation shaft is attached to the side wall of the housing. A speed setting device for a housing that is eccentrically and displaceably supported by a rotatably fitted fine adjustment wheel.