JP3138647B2 - Intermittent rotation mechanism and rotation display device using the rotation mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intermittent rotation mechanism for intermittently rotating a rotator and a rotary display device using the intermittent rotation mechanism.

[0002]

2. Description of the Related Art As a mechanism for intermittently rotating a rotating body, for example, there is an intermittent gear as shown in FIG.

[0003] The intermittent gear comprises a driving wheel 2 having a toothless cylindrical surface portion 1 and a driven wheel 3, and the driving wheel 2 has a larger diameter than the driven wheel. Further, the driving wheel 2 and the driven wheel 3 have the same number of teeth formed at the same pitch, and the cylindrical portions 1 having no teeth slide with each other.

[0004] For this reason, when the toothed portions of the driving wheel 2 and the driven wheel 3 mesh with each other and the driven wheel 3 makes one rotation, the cylindrical portions 1 without teeth come into contact with each other. Then, a slip occurs and the driven vehicle 3 stops, but the driving vehicle 2 keeps rotating. When the toothed portion of the driving wheel 2 comes into contact again, the driven wheel 3
And the driven wheel 3 starts to rotate again. Intermittent rotation can be performed by repeating such an operation.

Incidentally, as one of the devices using such an intermittent mechanism, there is a rotary display device shown in FIG.

This display device is composed of a plurality of display panels 4, and each of the display panels 4 has, for example, three display surfaces 5 having a triangular cross section in FIG. Then, by rotating the display plate 4 continuously, three different displays are performed. Therefore, in such a display device, when the display surface 5 is displayed using the intermittent mechanism, the display surface 5 is temporarily stopped to enhance the display effect.

For example, as shown in FIG. 19, the intermittent mechanism as described above and each display plate 4 are connected via an orthogonal transformation mechanism 6 using a "helical gear" or a "worm gear". Thereby, the above effect is obtained.

[0008]

However, in the above device, an orthogonal transformation mechanism 6 using a "helical gear" or a "worm gear" must be provided for each display panel.
Therefore, it is difficult to reduce the size, the size of the display device is increased, and the weight is increased.

Further, the apparatus is complicated, and it takes time to maintain the drive mechanism and to replace the display plate connected to the orthogonal transform mechanism.

[0010] Further, due to the above-mentioned problem of enlargement and maintenance of the device, for example, there is also a problem that an installation place is limited. In particular, this problem is serious for a display panel having a large number of display panels.

An object of the present invention is to provide an intermittent drive device capable of intermittently driving orthogonal axes with a simple mechanism, and a rotary display device using the drive device.

[0012]

In order to solve the above-mentioned problems, in the invention relating to the intermittent rotation mechanism, a worm in which a single V-shaped spiral groove is formed around a rotation axis, and a rotation shaft of the worm The spiral groove has a required angle range formed in the same direction as the rotation direction of the worm at the center in the circumferential direction, and both ends of the spiral groove have the rotation axis of the worm. And gradually disappears in the opposite direction and disappears, and their disappearing ends overlap in the direction of the worm rotational axis, and the edges of the partition walls connecting the both disappearing ends are linear, and the worm spirals The driven shaft does not rotate while the corner of the driven shaft is fitted in a line contact state with the groove and follows the rotation of the worm, while the corner is fitted in the same direction as the rotation direction of the spiral groove,
As the corners are fitted into the shallower portion from one end of the same orientation portion, the driven shaft is rotated by being pushed by the spiral groove side wall of the shallower portion, and the partition wall edge faces one side surface of the driven shaft. After that, one side is pushed by the edge of the partition wall edge, and the other corner is pushed by the side wall of the spiral groove of the other shallow part, and the driven shaft rotates to reach the other end of the same direction part Is adopted.

This intermittent rotation mechanism arranges display plates in the form of a regular triangular prism in a line, continuously displays one side surface of each display plate, and intermittently rotates each display plate by 120 ° by a driving device. In this case, it is preferable to apply the present invention to a rotary display device for performing the display. At this time, the driven shaft of the intermittent rotation mechanism is connected to the rotation shaft of the display plate, and the rotation shaft of the worm is connected to the drive shaft of the driving device.

With this arrangement, each worm rotates as the drive shaft rotates, the regular triangular prism driven shaft rotates intermittently, and the display plate connected to it also rotates intermittently. Three different displays can be performed without using a conversion mechanism.

In the rotary display device having this configuration, the drive shaft is polygonal and each worm is fitted to the drive shaft, and the drive shaft is formed with a predetermined twist.
If the phases of the worms located one after another in the longitudinal direction of the drive shaft are shifted in order, the movement of each worm will be
The display may be displaced sequentially in the longitudinal direction of the drive shaft, for example, causing a wave.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show a first embodiment of an intermittent rotation mechanism according to the present invention. This intermittent rotation mechanism includes a worm 10 having a single spiral V-shaped groove 12 formed around a rotation axis C1 and a driven shaft 11 having a rotation axis C2 orthogonal to the rotation axis C1 of the worm 10. Become. Driven shaft 1
Numeral 1 is a prism formed by a plurality of surfaces 13 whose corners fit into the spiral groove 12 of the worm 10 and are in line contact with the wall surface. In this embodiment, the prism 1 is a regular triangular prism.

The helical groove 12 of the worm 10 has a half-circumferential (180 °) portion 16 oriented in the same direction as the rotation direction.
Both ends are portions 15, 15 which gradually become shallower and disappear in the opposite direction of the rotation axis of the worm. The disappearing portions 15 and 15 overlap in the direction of the worm rotation axis, and the edge 14a of the partition wall 14 connecting the both disappearing ends is linear.

This embodiment is configured as described above.
Next, the operation will be described with reference to FIG.
The engagement state of the driven shaft 11 with respect to the rotation phase of the worm 10 is shown in order.

Now, as shown in FIG. 3A, in a state where the driven shaft 11 is fitted in the same direction 16 as the rotation direction of the spiral groove 12, that is, between 0 ° and 180 °,
Even when the worm 10 rotates, the driven shaft 11 is maintained in a substantially stationary state. Then, the driven shaft 11 has the same orientation portion 1
After the other end of 6 (after (b)), the driven shaft 11 is pushed by the side wall of the shallow portion 15 of the spiral groove 12 with the rotation of the worm 10 and starts rotating. Then, the worm 10 is rotated by 180 ° as shown in FIGS.
When the shaft is rotated by 90 degrees of about 270 degrees, the driven shaft 11 is almost 60 degrees.
°, and the worm 10 further moves from FIG.
When rotated, the driven shaft 11 fits into the other shallow portion 15 of the spiral groove 12 and is pushed by the side wall thereof for another 6 seconds.
It rotates by 0 ° and fits in the same direction part 16.

For this reason, the driven shaft 11 rotates 120 ° by a half rotation of the worm 10, and maintains the state for the remaining half rotation. That is, every time the worm 10 makes one rotation, the driven shaft 11 stops half a rotation while keeping one contact surface 13 on the surface (the right surface in FIG. 3A), and then makes the next contact surface 13 the surface. To rotate. At this time, since each contact surface 13 of the driven shaft 11 makes linear contact with the wall of the spiral groove 12, the contact portion with the spiral groove 12 is increased, and the load capacity can be increased. Thus, in this mechanism,
Intermittent drive of the driven shaft 11 perpendicular to the axis can be performed by a simple mechanism.

In this embodiment, the same direction portion 16 is formed as a half around the spiral groove 12, but the present invention is not limited to this. That is, it goes without saying that the intermittent time can be arbitrarily changed by changing the amount of formation of the portion 16 in the circumferential direction. Further, it is preferable that such a rotation mechanism be formed of a soft material such as a resin, because generation of noise can be prevented.

Next, FIGS. 4 to 7 show a second embodiment in which this embodiment is applied to the rotary display device described with reference to FIG.

This display device comprises a plurality of display plates 4 as described in the prior art. In the case of this embodiment, the display panel 4 is a regular triangular prism, and one end of each display panel 4 is supported by a bearing 20 as shown in FIG.
Attached to. On the other hand, the above-mentioned rotation mechanisms are attached to the other end, and each rotation mechanism is connected to one drive shaft 22 connected to the motor 21.

In each rotating mechanism, a worm 10 having the spiral groove 12 described above and a driven shaft 11 orthogonal to the worm 10 are housed in a box-shaped case 23 shown in FIG.

The box-shaped case 23 has upper and lower mounting grooves 24, and the grooves 24 are fitted into a fitting holder (not shown) provided in the case 20 of the rotary display device. It is designed to be removable. The box-shaped case 23 is provided with through holes 25 and 26 so that the worm 10 and the driven shaft 11 can be supported.

That is, as shown in FIGS. 6 and 7, the driven shaft 11 is a regular triangular prism that is in line contact with the spiral groove 12 of the worm 10, and one end of the driven shaft 11 is connected to the display plate 4 for connection. Are provided. In addition, the driven shaft 1
1 is provided with a shaft 28 at the other end, and the protrusion 27 and the shaft 28
5 to be rotatably supported.

The projection 27 has a Y-shape in plan view.
A hole that fits into the Y-shaped projection 27 is provided at the other end of the display panel 4. By using such fitting by the projections 27, the display panel 4 can be easily attached and detached with one touch, so that the display device can be easily assembled and the display panel 4 can be easily replaced after the assembly. It has become.

On the other hand, the worm 10 has the same configuration as described above, and is formed such that the wall surface of the spiral groove 12 is in line contact with each contact surface 13 of the driven shaft 11. The shaft 29 of the worm 10 is rotatably supported by being fitted into a through hole 26 provided in the box case 23 as shown in FIG. 5 and 6, a through hole 30 is provided in the shaft 29, and the drive shaft 22 connected to the motor 21 is inserted therethrough. The motor 21
In this embodiment, a geared motor is used to drive the worm 10 at a low speed.

This embodiment is configured as described above. Now, when the motor 21 starts rotating, the worms 10 of the respective rotating mechanisms connected to the drive shaft 22 simultaneously start rotating. Then, as described above, for example, each worm 10 starts rotating as shown in FIG.
The rotation is regulated by the same direction portion 16 of the helical groove 12, and is kept almost stationary during a period of 0 ° to 180 °. After 180 °, the driven shaft 11 is pushed by the side wall of the spiral groove 12 and starts rotating as the worm 10 rotates. And the worm 10 is 180 °
When the shaft is rotated by 90 degrees of about 270 degrees, the driven shaft 11 is almost 60 degrees.
° rotate. Further, the worm 10 is set at 270 ° to 360 °.
When rotated to a degree, the driven shaft 11 further rotates by 60 degrees.

Therefore, the driven shaft 11 rotates 120 ° by a half rotation of the worm 10, and maintains the state for the remaining half rotation. That is, each time the worm 10 makes one rotation, each display surface 5 of the display panel 4 rotates simultaneously. Then, the display surface 5 is temporarily stopped to enhance the display effect. In addition, the intermittent time of the temporary stop can be arbitrarily set by changing the amount of circumferential formation of the same direction portion 16 of the spiral groove 12 of the worm 10.

As described above, if this rotating mechanism is used, the orthogonally driven shaft 11 can be intermittently driven by a simple mechanism without providing an orthogonal mechanism such as a gear, so that the mechanism can be simplified. Therefore, size reduction is easy and weight reduction can be achieved. In particular, if the rotation mechanism is unitized by the box case 23 as described above, the assembly can be easily performed and the mechanism can be simplified, which is advantageous when performing maintenance or replacing the display panel. Therefore, in the case of a large number of display panels 4,
Particularly remarkable effects can be obtained.

In this embodiment, the rotation mechanism is provided for each display plate 4. However, for example, as shown in FIG. 8, pulleys 17 are attached to each display plate 4, and the pulleys 17 You may make it connect with three rotation mechanisms (box-shaped case 23) and the belt 18. In this case, cost can be reduced.

Next, a third embodiment in which the driven shaft 11 also serves as the display plate 4 will be described.

In this embodiment, as shown in FIGS. 9 to 11, the driven shaft 11 is extended to serve also as the display plate 4, and the display surface 5 is formed on each surface 13 of the extended driven shaft 11. . In this embodiment, bearings may be provided on both sides of the case 20, and shafts supported by the bearings may be provided at both ends of the driven shaft 11 so as to be rotatable in the horizontal direction as shown in FIG. It is supported.

As shown in FIG. 11, the worm 10 directly fits into the drive shaft 22 of the motor 21 by the number of the driven shafts 11 without using the box-shaped case 23, and is vertically inserted into the end of the case 20. By being attached, it is made to be orthogonal to the driven shaft 11.

The worm 10 is shown in FIGS.
As shown in FIG. 1D, the partition wall 14 of the worm 10 shown in FIG. 1 is protruded largely at both ends, so that line contact with the driven shaft 11 can be easily performed. I have.

This embodiment is configured as described above. Next, the operation will be described with reference to FIG. FIG. 13 shows the engagement state of the driven shaft 11 with respect to the rotation phase of the worm 10 in order.

Now, when the worm 10 starts rotating as shown in FIG. 13A, the rotation of the driven shaft 11 is restricted by the same direction portion 16 of the spiral groove 12, and 0 ° to 180 ° up to FIG. It is held almost stationary for a period of °. Next, after the state (b), the driven shaft 11 is pushed by the side wall of the gradually decreasing portion 15 of the spiral groove 12 and starts rotating with the rotation of the worm 10, as described above. The worm 10 is 180 ° as shown in FIG.
When rotated by 90 ° of ２270 °, the driven shaft 11
The worm 10 is rotated by 0 °, and the worm 10 is further rotated (c) to (e).
Rotating up to this point, the spiral groove 12 becomes gradually shallower.
5, the driven shaft 11 is further rotated by 60 °.

Therefore, the driven shaft rotates 120 ° by a half rotation of the worm 10, stops the remaining half rotation, and rotates intermittently. As a result, when one display surface 5 is displayed, the display surface 5 can be paused and displayed.

Further, as a fourth embodiment, as shown in FIG. 14, there is shown a display panel 4 in which the display plate 4 can be continuously rotated with a predetermined displacement.

In this method, as shown in FIG. 15, the cross-sectional shape of the drive shaft 22 connected to the motor 21 is, for example, hexagonal. This shape is not limited to a hexagon, but may be any polygon.

Next, a predetermined twist is formed on the drive shaft 22. Incidentally, this torsion can be easily formed by, for example, fixing one end of the drive shaft 22 and rotating the other end.

On the other hand, the cross section of the entrance of the through hole 30 of the worm 10 to which the drive shaft 22 communicates is made hexagonal in accordance with the drive shaft 22. Further, the outlet is formed so as to have a larger diameter than the inlet, so that the outlet is in contact with the drive shaft 22 at one point (inlet portion).

The plurality of worms 10 formed as described above
Is inserted into the twisted drive shaft 22 as shown in FIG.
As shown in FIG. 5, each worm 10 can be mounted in a slightly different phase.

Therefore, when the drive shaft 22 is rotated, each worm 10 starts to rotate from a different phase, and as shown in FIG. 14, each of the display plates 4 starts rotating with a slight delay. And, for example, since it can be rotated so as to cause a “wave”, a strong impact is given to a viewer, and the display effect can be improved.

At this time, if the amount of the twist is within 180 ° which forms the same direction portion 16 of the spiral groove 12 in this embodiment, the display is temporarily stopped in a state where the display on the display panel 4 is aligned. be able to.

FIG. 16 shows a fifth embodiment in which a holder 33 for detachably supporting a plate-like display body 32 is provided on each display surface 5 of the display plate 4 as shown in FIG.

That is, the holder 33 has a similar shape to the display panel 4. For example, in this embodiment, in the case where the display plate 4 is a triangular prism as described in the above embodiment, a triangular prism formed of a transparent resin slightly larger than the triangular prism is used.

The holder 33 is fitted into the display panel 4 to form a gap between the holder 33 and the display panel. Then, the display body 32 formed in a plate shape is fitted into the gap.

Here, the display 32 is a picture or a picture to be displayed on each display surface 5 of each display panel 4 on the surface of a film or thin plate formed in a size corresponding to the display surface. This is a display of a photograph or the like.

By replacing the display 32 according to the display content, the display content can be changed without replacing the display panel 4 body. In this way, the display content of the display panel 4 can be easily changed, so that maintenance work can be omitted.

[0053]

As described above, the present invention can provide an intermittent drive device capable of intermittently driving orthogonal axes with a simple mechanism, and a rotary display device using the drive device.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a first embodiment.

FIG. 2A is a bottom view of the worm according to the first embodiment;
(B) plan view, (c) sectional view

FIG. 3 is a diagram illustrating the operation of the first embodiment.

FIG. 4 is a cut-away front view of the second embodiment.

FIG. 5 is a perspective view of a main part of the second embodiment.

FIG. 6 is a plan view of a part of the second embodiment in which main parts are partially removed;

FIG. 7 is a partial cutaway side view of a main part of the second embodiment.

FIG. 8 is a cut-away front view showing another aspect of the second embodiment.

FIG. 9 is a cutaway front view of the third embodiment.

FIG. 10 is a cut-away partial plan view of the third embodiment.

FIG. 11 is a cut-away side view of the third embodiment.

12A is a perspective view of a worm according to a third embodiment. FIG. 12B is a left side view of the worm according to the third embodiment. FIG. 12C is a right side view of the worm according to the third embodiment. Warm top view

FIG. 13 is an operation explanatory view of the third embodiment.

FIG. 14 is a diagram illustrating the operation of the fourth embodiment.

FIG. 15 is a diagram illustrating the operation of the fourth embodiment.

FIG. 16 is an operation explanatory view of the fifth embodiment.

FIG. 17 is a plan view of a conventional example.

FIG. 18 is a perspective view of a conventional example.

FIG. 19 is a partially cutaway sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 4 Display board 5 Display surface 10 Worm 11 Drive shaft 12 Helical groove 13 Contact surface (side surface) 14a Partition edge 15 Part of spiral groove 12 becoming gradually shallow 16 Part in the same direction as the spiral direction of spiral groove 12 Drive shaft 30 Through hole 32 Display 33 Holder

Claims (3)

(57) [Claims] 1. A worm 10 formed with a single spiral groove 12 having a V-shaped cross section around a rotation axis C1, and a regular triangular prism driven shaft 11 having a rotation axis C2 orthogonal to the rotation axis C1 of the worm 10. The helical groove 12 has a required angle range formed in the same direction as the rotation direction of the worm 10 in the middle in the circumferential direction, and both ends thereof are gradually set in the opposite direction to the rotation axis C1 direction of the worm 10. And the extinguishing end overlaps in the direction of the worm rotation axis C1 and the partition edge 14a connecting the two extinguishing ends is linear, and the driven shaft 11 is driven by the spiral groove 12 of the worm 10. Are fitted in a line contact state and follow the rotation of the worm 10 while the driven shaft 11 does not rotate while the corner is fitted in the same direction portion 16 as the direction of rotation of the spiral groove 12, So As the corners of the shafts are fitted into the portions 15 that gradually become shallower from one end of the same direction portion 16, the driven shaft 11 is rotated by being pushed by the spiral groove 12 side wall of the portions 15 that become shallower, and the partition wall edge 14a is driven. After opposing one side surface 13 of the shaft 11, the one side surface 13 is pushed by the end of the partition wall edge 14a, and the helical groove 12 of another shallow portion 15 having another corner portion is formed.
The intermittent rotation mechanism characterized in that the driven shaft 11 is rotated by being pushed by the side wall of the second member to reach the other end of the same direction portion 16. 2. Display plates 4 each having a regular triangular prism shape are arranged in a line, and one side surface 5 of each display plate 4 is displayed continuously, and each display plate 4 is intermittently rotated by 120 ° by a driving device. 2. A rotary display device for performing the display by connecting the driven shaft 11 of the intermittent rotation mechanism to the rotation shaft 27 of the display plate 4 and connecting the rotation shaft of the worm 10 to the drive shaft of the driving device. 22. A rotating display device connected to the rotating display device. 3. The rotary display device according to claim 2, wherein the drive shaft 22 has a polygonal shape, and each worm 10 is fitted to the drive shaft 22. The drive shaft 22 has a predetermined twist. , The phases of the worms 10 sequentially positioned in the longitudinal direction of the drive shaft 22 are sequentially shifted.