JPH021710Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an automatic reel fixing mechanism, and particularly to an automatic reel fixing mechanism that automatically fixes a reel or open reel attached to a cartridge at a predetermined position on a drive device. be.

Conventionally, a mechanism for automatically fixing a reel at a predetermined position of a drive device fixes the support hole of the reel at three or more support points and determines the center position of the reel. Therefore, it is necessary that the distance from the true center to the support point of the reel is accurate, and if this distance goes out of order, the center of rotation will shift, so a fixing mechanism that always maintains the position of each support point accurately is required. This made the reel fixing device complicated and caused core up.

This idea was created in view of the above circumstances.
A positioning block is fixed to the rotating disk in advance at the position where the reel is fixed, and on the other hand, the eccentric disk is driven by a guide pin roller guided by the contour of the cam, and the support hole of the reel is aligned with the above positioning block. It has a structure in which the reel is fixed by supporting it at two points: the reel and the eccentric disc cam, and the reel rotation center can be accurately determined with a simple structure and without requiring much precision in the reel fixing mechanism itself. The purpose is to provide an automatic reel fixing mechanism. Therefore, the automatic reel fixing mechanism of the present invention includes a rotating disc fixed to the shaft of the drive device, a positioning block fixed to the rotating disc, and a positioning block provided on the rotating disc and protruding through the rotating disc. An eccentric disc cam having a guide pin roller, a positioning block and an eccentric disc cam, and an upper disc that is slidably supported in the horizontal direction with respect to the rotating disc, and is rotatably fitted to the shaft of the drive device. It is equipped with a cam that is inserted and guides the guide pin roller, and an engaging means that engages with the cam to stop the cam, and the reel that has been set and guided by the upper disk is connected to the positioning block and the eccentric disk cam. It is characterized by being configured to be fixed in place. An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a top view of the automatic reel fixing mechanism according to the present invention before the reel is fixed, FIG. 2 is a view taken in the direction of the - arrow in FIG. 1, and FIG. 4 is a view in the direction of the − arrow in FIG. 2, FIG. 5 is a top view of the automatic reel fixing mechanism according to the present invention when the reel is fixed, FIG. 6 is a view in the direction of the − arrow in FIG. 5, and FIG. Each figure shows a view taken along the - arrow in FIG.

1 to 7, a rotating disk 3 is fixed to the shaft 2 of the drive motor 1 with bolts 5, and as the drive motor 1 is driven, the rotating disk 3 is integrally connected to the shaft 2. Rotate. Rotating disk 3
A positioning block 11 is fixed on the top with screws 4, and the positioning block 11 and bolts 5
The eccentric disc cam 14 is connected to the screw 16 on the opposite side across the
It is fixed to the shaft so that it can rotate freely. The upper disk 8 is supported by the positioning block 11 and the eccentric disk cam 14 so as to be horizontally slidable relative to the rotating disk 3. That is, the positioning block 11 fixed to the rotating disk 3 with screws 4 is attached to the upper disk 8.
The upper and lower surfaces of the upper disk 8 are supported by washers 10 fitted into elongated holes 9 bored in the upper disk 8. Furthermore, since the eccentric disc cam 14 is rotatably fixed to the rotating disc 3 with a screw 16 through an elongated hole 15 bored in the upper disc 8, the eccentric disc cam 14 is also attached to the upper disc 8. It supports the upper and lower surfaces of 8.

The positioning block 11 is located at a position where the distance from the center of the shaft 2 of the drive motor 1 to the outer surface of the annular rubber band 12 hung on the tip of the positioning block 11 is the same length as the radius of the support hole of the reel 13. An annular rubber band 12 is fixed to the positioning block 11 and is attached to the end of the positioning block 11.
The radius of curvature of the outer surface of the reel 13 is the same as the radius of the support hole of the reel 13.

A guide pin roller 18 is provided at the lower end of the eccentric disc cam 14 and projects through the rotary disc 3 through an escape hole 17 formed in the rotary disc 3.

A column 6 is fixed with a screw 7 to an upper disk 8 that is supported slidably in the horizontal direction with respect to the rotating disk 3 (the lower end of the column 7 can freely slide on the upper surface of the rotating disk 3). ), an annular rubber band 12 is hung around the two pillars 6, the positioning block 11, and the eccentric disk cam 14.

A cam 20 having the shape shown in FIGS. 4 and 7 is rotatably fitted into the shaft 2 of the drive motor 1. As shown in FIG. The cam 20 has a groove 20a.
is provided, but a convex portion 20b is provided in the groove 20a.
is provided, and when the solenoid 21 is actuated, the working rod 22 extends and hits the protrusion 20b provided in the groove 20a. The convex portion 20b provided on the cam 20 in this manner is provided to stop the rotation of the cam 20. Accordingly, the solenoid 21 is activated, the action rod 22 is extended and hits the protrusion 20b provided in the groove 20a, and when the rotation of the cam 20 is stopped, the rotating disk that rotates together with the shaft 2 of the drive motor 1 3, the guide pin roller 18 extends downward from the lower end of the eccentric disc cam 14 through the rotating disc 3.
Tracing the outline of the cam 20, the eccentric disc cam 14 performs a swinging motion with the screw 16 as the axis.
For example, when the eccentric disc cam 14 expands outward due to the rocking motion of the eccentric disc cam 14,
The eccentric disc cam 14 first contacts the inner diameter of the reel 13 on the X side via the annular rubber band 12. When the eccentric disk cam 14 further expands outward, the reel 13
is moved in the direction of arrow Z shown in FIG. When the eccentric disk cam 14 further expands outward, the reel 13 and the upper disk 8 are moved in the direction of arrow Z shown in FIG. When the inner diameter of the reel 13 on the Y side comes into contact with the positioning block 11 via the annular rubber band 12, the reel 1
3 and the upper disk 8 stop moving in the direction of arrow Z. At this time, the reel 13 will be fixed at an accurate center position.

Further, when the eccentric disc cam 14 swings inward, that is, when the eccentric disc cam 14 is retracted, the positioning block 11 and the eccentric disc cam 1
Due to the tension of the annular rubber band 12 applied to the four and two columns 6, a force is applied to the column 6 in the direction of the arrow G shown in FIG. It is returned to its original position. In this way, the upper disk 8 moves (slides) in the horizontal direction with respect to the rotating disk 3.

The outer surface of the annular rubber band 12 before the reel is fixed is the first
As shown in FIGS.
3 on the rotating disk 3 (the inner diameter of the support hole of the reel 13 is slightly larger than the diameter of the upper disk 8). Then, as described above, the eccentric disc cam 14 rotates, and as the upper disc 8 is moved in the Z direction, the positioning block 11 is moved at the position where the reel 13 is fixed as shown in FIGS. 3 and 4. A circular rubber band 1 hung on the tip of
The outer surface of 2 is in the same state as the outer periphery of the upper disk 8.

Further, the outer surface of the annular rubber band 12 hung on the eccentric disk cam 14 also extends slightly outward from the outer periphery of the upper disk 8.

Note that the height from the top surface of the rotating disk 3 to the bottom surface of the upper disk 8 is made lower than the height of the reel 13, so that when the reel 13 is attached or detached, especially when it is removed, the support hole of the reel 13 is located in the upper disk. This avoids a situation in which it is difficult to remove the reel 13 due to contact with the protruding lower end surface of the reel 8.

Reference numeral 23 is a spring and a solenoid 21
is provided for retracting its working rod 22 when it is deenergized.

The operation of the automatic reel fixing mechanism of the present invention constructed as described above will now be described.

(b) When fixing the reel Place the reel 13 against the upper disk 8 and place it on the rotating disk 3.
Once set upward, solenoid 21 is actuated to extend its working rod 22 into groove 20a.
When the drive motor 1 is rotated in the direction of arrow A in FIG. 4, the rotating disk 3 and the cam 20 are also rotated in the same direction. Within half a rotation of the drive motor 1, the working rod 22 extending into the groove 20a hits the protrusion 20b provided in the groove 20a and stops the rotation of the cam 20. However, the rotating disk 3 rotates further, and the rotating disk 3
and cam 20 perform differential rotation. That is, the rotating disk 3 further rotates in the direction of arrow A in FIG. 4 with respect to the stopped cam 20. At this time, the guide pin roller 18 of the eccentric disc cam 14 traces the outline BC of the cam 20, so the eccentric disc cam 14 is moved outward about the screw 16. As the eccentric disc cam 14 moves outward, the eccentric disc cam 14 comes into contact with the inner diameter of the reel 13 on the X side via the annular rubber band 12. The eccentric disk cam 14 is further expanded outward by the guide pin roller 18 guided by the cam 20, and the reel 13 is also moved in the direction of arrow Z shown in FIG. Eventually, the inner diameter of the reel 13 on the Y side comes into contact with the positioning block 11 via the annular rubber band 12. As shown in FIGS. 5 and 6, the positioning block 11 and the eccentric disk cam 14
The outer surface of the annular rubber band 12 hung on the tip of the upper disc 8 moves relatively to the same position as the outer periphery of the upper disk 8, presses the inner surface of the support hole of the reel 13, and fixes the reel 13. . Then solenoid 2
1 is deenergized, and the working rod 22 is retracted by the elastic force of the spring 23.

(b) When releasing the fixation of the reel, operate the solenoid 21 and its operating rod 22.
is extended into the groove 20a. When the drive motor 1 is rotated in the direction opposite to the direction of arrow A in FIG.
When this happens, the rotation of the cam 20 is stopped. However, the rotating disk 3 rotates further, and the rotating disk 3 and the cam 2
0 performs differential rotation. At this time, eccentric disc cam 1
The guide pin roller 18 of No. 4 has the contour CB of the cam 20.
, and the circular rubber band 12 hung on the two pillars 6 is under tension so as to move the pillars 6 in the direction of the arrow G shown in FIG. 13 moves in the direction of arrow G.
In this way, the fixation of the reel 13 is loosened. As shown in FIGS. 1 to 3, the outer surface of the annular rubber band 12 hung on the tip of the positioning block 11 and the eccentric disc cam 14 enters inward from the outer periphery of the upper disc 8, and the reel 13 away from the inner surface of the support hole. That is, the state returns to the original state shown in FIGS. 1 to 3. The solenoid 21 is then deenergized and retracted by the elastic force of the actuating rod 23.
As a result, the fixed reel 13 is released, and the reel 13 can be removed from the upper disk 8.

As explained above, according to the present invention, one of the two support points for fixing the reel is fixed in advance at an accurate position, and the other support point is moved. Because of this, the reel can be positioned accurately and the reel can be automatically fixed without shifting the center of rotation. Since the reel is supported at two points, the reel fixing mechanism itself is simplified. Therefore, the cost of the reel fixing device can be reduced.

[Brief explanation of drawings]

FIG. 1 is a top view of the automatic reel fixing mechanism according to the present invention before the reel is fixed, FIG. 2 is a view taken in the direction of the - arrow in FIG. 1, and FIG. 4 is a view in the direction of the − arrow in FIG. 2, FIG. 5 is a top view of the automatic reel fixing mechanism according to the present invention when the reel is fixed, FIG. 6 is a view in the direction of the − arrow in FIG. 5, and FIG. Each figure shows a view taken along the - arrow in FIG. In the figure, 1 is a drive motor, 2 is a shaft, 3 is a rotating disk, 4 is a screw, 5 is a bolt, 6 is a column, 7 is a screw, 8 is an upper disk, 9 is an elongated hole, 10 is a washer,
11 is a positioning block, 12 is a circular rubber band, 1
3 is a reel, 14 is an eccentric disc cam, 15 is a long hole,
16 is a screw, 17 is an escape hole, 18 is a guide pin roller, 20 is a cam, 20a is a groove, 20b is a protrusion, 21 is a solenoid, 22 is an action rod, 23
each represents a spring.

Claims (1)

[Scope of utility model registration request] a rotating disk fixed to the shaft of the drive;
a positioning block fixed to the rotating disk; an eccentric disk cam rotatably provided on the rotating disk and having a guide pin roller protruding through the rotating disk; the positioning block; an upper disk supported by the eccentric disk cam so as to be slidable in the horizontal direction with respect to the rotating disk; a cam rotatably fitted into the shaft of the drive device and guiding the guide pin roller; and; means for engaging the cam and stopping the cam, and the reel guided by the upper disc and set on the rotating disc is fixed by the positioning block and the eccentric disc cam. Features automatic reel fixing mechanism.