JP2020101262A - Crank feeding device - Google Patents

Abstract

To provide a crank feeding device capable of moving a long stroke even with a small size, and eliminating the need of using an internal tooth gear.SOLUTION: A crank feeding device is composed of a first sun gear 11 fixed to a base 10, a first crank 15 rotation-driven coaxially with the first sun gear by a drive motor, a first planetary gear 18 journaled at a tip end of the first crank 15, a second crank 20 fixed to the first planetary gear at a base portion, and an odd number of idle gears journaled on the second crank 20 and interposed between the first sun gear 11 and the first planetary gear 18.SELECTED DRAWING: Figure 1

Description

The present invention relates to a crank feeding device that is mounted on a game board such as a pachinko machine and that uses a crank motion to move a decorative body at high speed.

As a device for moving the ornament on the board surface of the game board, there is a device described in Patent Document 1 in which two arms are opened and closed by gears. In this device, the second arm is pivotally supported by the tip of the first arm, the tip of the second arm is supported by the guide rail, and the folded arm can be horizontally extended.

However, in this structure, since the first arm and the second arm move only to one side, there is a problem that the entire size must be increased in order to perform a long stroke motion.

Further, the device of Patent Document 1 has a structure in which a sector gear having internal teeth is attached to the base portion of the first arm and the first arm is driven by meshing with the drive pinion, so that there is a problem that the manufacturing cost increases. It was

Japanese Patent No. 5048019

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned conventional problems, and to provide a crank feeding device which is small in size and can be moved in a long stroke and which does not require the use of an internal gear.

The crank feeder of the present invention made to solve the above problems includes a first sun gear fixed to a base, a first crank rotationally driven by a drive motor coaxially with the first sun gear, and a first crank. A first planetary gear that is axially supported at the tip of one crank, a second crank whose base is fixed to this first planetary gear, and a first sun gear and a first planetary gear that are axially supported on the second crank. It is characterized in that it is composed of an odd number of idle gears that are interposed therebetween.

According to a second aspect of the present invention, in addition to the configuration of the first aspect of the invention, the crank feeding device further includes a second planetary gear that is axially supported at the tip of the second crank, and a third crank whose base is fixed to the second planetary gear. A second sun gear fixed coaxially with the first planetary gear and fixed to the second crank, and an odd number of idle gears interposed between the second planetary gear and the second sun gear Is.

According to a third aspect of the present invention, in the crank feeding device of the first aspect, if the first crank and the second crank have the same length and the number of teeth of the first sun gear is twice the number of teeth of the first planetary gear. , The tip of the second crank can be moved linearly. According to a fourth aspect of the present invention, in the crank feeding device of the second aspect, the length of the second crank is equal to the sum of the lengths of the first crank and the third crank, and the number of teeth of the first sun gear is the first. If the number of teeth of one planetary gear is twice and the number of teeth of the second sun gear is equal to the number of teeth of the second planetary gear, the tip of the third crank can be moved linearly.

In any of the inventions, it is preferable that the base portion of the first crank is fixed to a drive gear that is provided coaxially with the first sun gear on the back surface of the base, and is rotationally driven.

The crank feeding device of the present invention can move the tip of the second crank with a long stroke by rotating the first crank by 180 degrees. Especially, when the first crank and the second crank are equal in length, and the number of teeth of the first sun gear is twice the number of teeth of the first planetary gear, the tip of the second crank is four times the crank length. You can make a linear motion with the stroke.

In the crank feeding device of the second aspect, the tip of the third crank can be moved with a longer stroke by rotating the first crank by 180 degrees. Particularly, the length of the second crank is made equal to the sum of the lengths of the first crank and the third crank, the number of teeth of the first sun gear is set to be twice the number of teeth of the first planetary gear, and When the number of teeth is made equal to the number of teeth of the second planetary gear, the tip of the third crank can be linearly moved with a stroke of 6 times the crank length.

As described above, the crank feeding device of the present invention is small in size and can move with a long stroke. Further, the crank feeding device of the present invention can be configured with only the external gear, and it is not necessary to use special parts, so that the crank feeding device can be easily manufactured. Further, since the cranks are aligned on a straight line in the feed direction at both ends of the stroke, there is a mechanical lock effect that prevents the cranks from rotating even when an external force is applied due to vibration or the like.

It is an external appearance perspective view of 1st Embodiment. It is an exploded perspective view of a 1st embodiment. It is a 3rd figure which shows an internal structure. It is a principle view of the mechanism of the first embodiment. It is operation|movement explanatory drawing of 1st Embodiment. It is an external appearance perspective view of 2nd Embodiment. It is a 3rd figure which shows the internal structure of 2nd Embodiment. It is a principle view of a mechanism of the second embodiment. It is a figure which shows the locus|trajectory in 2nd Embodiment. It is operation|movement explanatory drawing of 3rd Embodiment.

(First embodiment)
FIG. 1 is an external perspective view of the crank feeding device of the first embodiment, FIG. 2 is an exploded perspective view thereof, and FIG. 3 is a three-sided view showing the internal structure thereof.

In these figures, 10 is a base and 11 is a first sun gear fixed to the surface of the base 10. A through hole 12 penetrating the base 10 is formed at the center of the first sun gear 11, and a central shaft 14 of a drive gear 13 provided on the back surface of the base 10 penetrates the through hole 12 and a front surface thereof is formed. The base 15 of the first crank is fixed. As shown in FIG. 3, a drive motor 16 is provided on the back surface of the base 10, and a driving gear 17 is attached to its output shaft. Therefore, when the motor 16 is driven, the drive gear 13 is rotated by the driving gear 17, and the first crank 15 fixed to the drive gear 13 can be driven to rotate left and right coaxially with the center of the first sun gear 11. it can.

A first planetary gear 18 is rotatably supported at the tip of the first crank 15. In addition, an idle gear 19 that is interposed between the first sun gear 11 and the first planetary gear 18 is rotatably supported at an intermediate position of the first crank 15 at its center. In this embodiment, the number of teeth of the first sun gear 11 is twice the number of teeth of the first planetary gear 18. The number of teeth of the idle gear 19 is arbitrary, but the number is assumed to be an odd number such as 1 or 3.

The base of the second crank 20 is fixed to the first planetary gear 18. Further, a shaft 22 is formed at the tip of the second crank 20 for directly or indirectly attaching a decorative body via a rod 21 or the like. In this embodiment, the first crank 15 and the second crank 20 have the same length. The length of the first crank 15 is the distance from the center of the first sun gear 11 to the center of the first planetary gear 18, and the length of the second crank 20 is the distance from the center of the first planetary gear 18 to the shaft 22. Is.

As the drive motor 16, it is preferable to use a stepping motor whose rotation angle can be easily controlled. In this embodiment, a pair of left and right stoppers 23 that restrict the maximum rotation position of the second crank 20 are provided on the surface of the base 10.

FIG. 4 is a principle diagram of the mechanism described above, 11 is a fixed first sun gear, 15 is a first crank, 18 is a first planetary gear, and 20 is a second planetary gear fixed to the first planetary gear 18. It is a crank. The first crank 15 is shown by a triangle in order to clearly show that the first planetary gear 18 is on the first crank 15, but the mechanism is equivalent to the crank feeder of the first embodiment.

Here, as shown in FIG. 4, the number of teeth of the fixed first sun gear 11 is Z ₁ , the number of teeth of the first planetary gear 18 is Z ₂ , the rotation speed of the first crank 15 is N ₁ , and the second crank Assuming that the rotational speed of 20 (=rotational speed of the first planetary gear 18) is N ₂ , N ₂ =−(Z ₁ /Z ₂ −1)N _{1 according} to the calculation formula of the gear train in the mechanics. If Z ₁ /Z ₂ =2 as in the present embodiment, N ₂ =−(2-1)N ₁ , that is, N ₂ =−N ₁ , and the second crank 20 rotates in the rotational direction of the first crank 15. In the opposite direction, the first crank 15 rotates at an angular velocity equal to that of the first crank 15. However, in this calculation, the rotational direction and the rotational speed are defined for the fixed base 10 and the like, and the relative angular velocity of the second crank 20 with respect to the first crank 15 is doubled. The odd number of idle gears 19 has a role of converting the rotation direction, but the number of teeth thereof does not affect the calculation of the number of rotations.

Therefore, as shown in FIG. 5, the first crank 15 and the second crank 20 always move by drawing an isosceles triangle with the tip of the first planetary gear 18 as the apex, and the shaft of the tip of the second crank 20 is moved. 22 moves on a straight line. Further, as can be seen from FIG. 5, according to the crank feeding device of the first embodiment, by rotating the first crank 15 by 180 degrees, the shaft 21 at the tip of the second crank 20 is made four times as long as the crank length. It can be moved linearly with a stroke. In either case, since the cranks are aligned on a straight line in the feed direction at both ends of the stroke, there is a mechanical lock effect that prevents the cranks from rotating even when an external force is applied due to vibration or the like.

(Second embodiment)
The crank feeding device of the second embodiment will be described below with reference to FIG. FIG. 6 is an external perspective view of the crank feeding device of the second embodiment, and FIG. 7 is an internal structure diagram thereof. The second embodiment is obtained by adding the following configuration to the configuration of the first embodiment.

That is, in the second embodiment, as shown in FIGS. 6 and 7, the second planetary gear 30 is further pivotally supported at the tip of the second crank 20, and the base of the third crank 31 is attached to the second planetary gear 30. Fix it. Further, a second sun gear 32 fixed to the second crank 20 is provided coaxially with the first planetary gear 18. Then, the second planetary gear 32 and the second sun gear 30 are connected by an odd number of idle gears 33 arranged on the second crank 20. Here, the second planetary gear 30 and the second sun gear 32 have the same number of teeth. Further, the axial distance between the first crank 15, the second crank 20, and the third crank 31 is set to be equal.

FIG. 8 shows the principle of the mechanism. In FIG. 8, the number of teeth of the first sun gear 11 is Z ₁ , the number of teeth of the first planet gear 18 is Z ₂ , the number of teeth of the second sun gear 32 is Z ₃ , and the number of teeth of the second planet gear 30 is Z. ₄ and then, when the rotational speed of the first crank 15 N _1, the rotation speed of the third crank 31 (= rotational speed of the second planetary gear 30) and N _3, the calculation formula of the gear train in mechanics, N ₃ ={(Z ₁ /Z ₂ )(Z ₃ /Z ₄ )-1}N ₁ . If Z ₁ /Z ₂ =2 and Z ₃ =Z ₄ as in the present embodiment, N ₂ =−N ₁ and N ₃ =N ₁ . That is, the third crank 31 rotates in the same direction as the rotation direction of the first crank 15 and at the same angular velocity as the first crank 15.

FIG. 9 shows an operating state of the crank feeding device of the second embodiment. As can be seen from FIG. 9, according to the crank feeding device of the second embodiment, by rotating the first crank 15 by 180 degrees, the shaft 34 at the tip of the third crank 31 strokes six times as long as the crank length. It can be moved with. However, in the second embodiment, the locus of the shaft 34 at the tip of the third crank 31 is not a straight line but a curved line that bulges upward.

(Third Embodiment)
FIG. 10 shows a crank feeding device of the third embodiment. The crank feeding device of the third embodiment is an improvement of the crank feeding device of the second embodiment, and the locus of the shaft 34 at the tip of the third crank 31 is made straight. The change is that the length of the second crank 20 is made equal to the sum of the lengths of the first crank 15 and the third crank 31. In this embodiment, the length of the second crank 20 is 1.5 times that of the first crank 15, and the length of the third crank 31 is 0.5 times that of the first crank 15. However, the length of each crank is not limited to this, and the length of each crank may be set to first crank:second crank:third crank=1:1.2:0.2 or 1:2:1. By doing so, as shown in FIG. 10, the locus of the shaft 34 at the tip of the third crank 31 becomes a straight line.

Although it is possible to add a fourth crank to the tip of the third crank 31, it is considered that the structure is gradually complicated and the cost is high, so that it is not practical as a crank feeder for a game board. ..

As described above, the crank feeding device of the present invention has an advantage that it can be moved in a long stroke such as four times or six times the crank length while being small.

10 Base 11 First Sun Gear 12 Through Hole 13 Drive Gear 14 Center Shaft 15 First Crank 16 Drive Motor 17 Drive Gear 18 First Planetary Gear 19 Idle Gear 20 Second Crank 21 Rod 22 Shaft 30 Second Planetary Gear 31 Third Crank 32 second sun gear 33 idle gear 34 shaft

Claims (5)

The first sun gear fixed to the base, the first crank that is rotationally driven coaxially with the first sun gear by the drive motor, the first planetary gear that is axially supported at the tip of the first crank, and the base are A crank comprising: a second crank fixed to the first planetary gear; and an odd number of idle gears axially supported on the first crank and interposed between the first sun gear and the first planetary gear. Feeder. A second planetary gear pivotally supported on the tip of the second crank, a third crank whose base is fixed to the second planetary gear, and a first planetary gear are provided coaxially and fixed to the second crank. The crank feeder according to claim 1, further comprising a second sun gear and an odd number of idle gears interposed between the second planetary gear and the second sun gear. The first crank and the second crank have the same length, the number of teeth of the first sun gear is twice the number of teeth of the first planetary gear, and the tip of the second crank is linearly moved. The crank feeding device described in. The length of the second crank is equal to the sum of the lengths of the first and third cranks, the number of teeth of the first sun gear is twice the number of teeth of the first planetary gear, and the teeth of the second sun gear are The crank feed device according to claim 1, wherein the number of teeth is equal to the number of teeth of the second planetary gear, and the tip of the third crank is moved linearly. The base of the first crank is fixed to a drive gear provided coaxially with the first sun gear on the back surface of the base, and the first crank is rotationally driven. Crank feeder.