JPH10165661A - Driving device for ornament - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drive device for an ornament, which saves power consumption without increasing its size, and efficiently transmits a power from a drive pulley to a drive belt. SOLUTION: A drive device for driving an ornament by means of a drive mechanism such as a motor through a drive belt 3 wound around a drive pulley and a driven pulley, comprises a pair of slide pins 10b, 10b for clamping the drive belt 3 at opposite sides thereof so as to uniformly apply pressing force upon two parts of the drive belt 3 on the side on which the drive belt 3 runs toward the drive pulley and on the side on which the drive belt 3 runs toward the drive pulley, and a tension member 10 having a resilient member 10c connected between the pair of slide pins 10b, 10b, and a holding member 6 held so as to be movable under the tension of the drive belt.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative body driving device for driving a decorative body by driving a driving belt around a driving pulley and a driven pulley, and more particularly, a tension for applying a pressing force to the driving belt by an elastic member. Regarding members.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, a driving belt 3 is wound around a driving pulley 1 and a driven pulley 2 to form a decorative body 5a,
There is known a decorative body driving device for driving 5b. This type of decorative body driving device rotates the drive pulley 1 forward and reverse by a motor 4 that can rotate forward and backward, and moves the decorative body 5a,
5b is reversed to entertain the viewer. In order to efficiently transmit the power from the drive pulley 1 to the drive belt 3, such a device has a slight slack in the belt 3 as shown in FIG. It is common to energize to increase. By urging the drive belt 3 in this manner, the power can be efficiently transmitted to the drive belt 3 without the drive belt 3 coming off the drive pulley 1.

In the conventional decorative body driving mechanism, a decorative body 5a is arranged on a driving pulley 1 and a decorative body 5b is also mounted on a driven pulley 2.
Is arranged. That is, the power from the motor 4 is transmitted to the pinion 1a provided on the drive pulley 1 to enable the rotation of the decorative body 5a provided on the drive pulley 1. On the other hand, since the decorative body 5 b is also arranged on the driven pulley 2, the decorative body rotates with the movement of the driven pulley 2.

FIG. 6 shows a state in which the driving pulley 1 is rotated in the forward direction. The driving belt 3 has a belt portion on the side flowing in the direction of the driving pulley 1 and a belt portion flowing in the direction of the driven pulley 2 each having one belt. The tension members 10 are arranged to face each other. This tension member 10 is shown in FIGS.
A fixed holding base 10a fixed to the frame body and provided with a long hole 10f on the upper surface as shown in FIG. 1 and a slide pin 10 guided and slid by the long hole 10f and a guide projection 10e described later.
b, a cylindrical member 10d that is loosely fitted to the slide pin 10b and comes into contact with the outer surface of the drive belt 3, and an elastic member 1 that can move the slide pin 10b to apply a pressing force to the belt.
0c. One end of the elastic member 10c is fixed to the inner surface of the fixed support 10a, and the other end is a slide pin 1
0b. A guide projection 10e is provided inside the fixed support 10a so as to move the slide pin 10b smoothly along the elongated hole 10f.

[0005]

In the above-described conventional decorative body driving device, when the driving pulley 1 is rotated forward as shown in FIG.
Due to the nature of the drive belt 3, the belt portion on the side flowing in the direction of the drive pulley 1 has a substantially straight shape without slack, but the belt portion on the side flowing in the direction of the driven pulley 2 is slightly slack and has a curved shape. Become. Conversely, as shown in FIG. 7, when the driving pulley 1 is reversed, the belt portion on the side flowing in the direction of the driving pulley 1 becomes substantially straight without slack, and the belt portion flowing in the direction of the driven pulley 2 Is slightly slack and has a curved shape. However, compared to when the drive pulley 1 is normally rotated, the two belt portions become substantially linear or slightly slack and bent when the normal rotation and the reverse rotation are performed. The shape or the shape of the belt changes.

In order to prevent the drive belt 3 from coming off the drive pulley 1, it is necessary to apply a predetermined pressing force only to the belt portion which is slack and slightly curved, as shown in FIGS. 6 and 7. In the configuration, the maximum force is applied to the belt portion (substantially linear belt portion) on the side flowing in the direction of the drive pulley 1 where no force needs to be applied. However, there is a drawback that the brake acts to hinder the movement of the drive belt 3. In order to solve the drawback, it is conceivable to use a drive device such as a motor having a large torque, but there is a drawback that the power consumption increases and the drive device becomes large.

Accordingly, the present invention has been made in view of such a conventional problem, and is a decorative body driving device in which the decorative body can be rotated forward and backward in accordance with the operation of the driving pulley, and the size of the driving device is increased. It is an object of the present invention to provide a decorative body driving device capable of efficiently transmitting power from a driving pulley to a driving belt without suppressing power consumption.

[0008]

In order to solve the above-mentioned problems, a decorative body for driving a decorative body by driving an endless drive belt around a drive pulley and a driven pulley that can be rotated forward and backward by a drive mechanism such as a motor. In the driving device, a tension member including a pair of slide pins for sandwiching both sides of the drive belt and an elastic member connected between the pair of slide pins, and the tension member is moved by a tension of the drive belt. And a holding member for holding as possible.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to FIGS. FIG. 1 is a sectional view showing a decorative body driving device according to the present invention, FIG. 2 is a plan view of a main part showing a state where a driving pulley is normally rotated, and FIG. FIG. 4 is a partial plan view, and FIG.
4A and 4B are sectional views taken along arrow E and FF shown in FIG. 3.

As shown in FIG. 1, in the decorative body driving mechanism of the present invention, a decorative body 5a is arranged on a driving pulley 1 and a decorative body 5b is also arranged on a driven pulley 2. That is, the motor 4
Is transmitted to the pinion 1a provided on the drive pulley 1 to rotate the decorative body 5a provided on the drive pulley 1.
In addition, the endless drive belt 3 is wound around the drive pulley 1 and the driven pulley 2 to transmit the power of the drive pulley to the driven pulley.

The motor 4 is a motor that can rotate forward and reverse, and is controlled by a control device such as a microcomputer (not shown) to rotate the decorations 5a and 5b via the driving pulley 1 and the driven pulley 2 in synchronization with the back music. ing.

When the drive pulley 1 is normally rotated as shown in FIG. 2, the belt portion on the side flowing in the direction of the drive pulley 1 has a substantially linear shape due to the nature of the drive belt 3 as shown in FIG. However, the belt portion on the side that flows in the direction of the driven pulley 2 has a weaker belt tension than that of the belt portion on the side that flows in the direction of the drive pulley 1 and has a slightly slack shape. Conversely, when the driving pulley 1 is rotated in the reverse direction as shown in FIG. 3, the belt portion on the side flowing in the direction of the driving pulley 1 has a substantially linear shape without slack.
The belt portion flowing in the direction of the arrow is slightly loosened and curved in comparison with the belt portion on the side flowing in the direction of the drive pulley 1.

When the driving pulley 1 is rotated forward and reversely, the two belt portions are straightened, slightly slackened and curved, or the shape of the belt is changed. Therefore, in order to prevent the drive belt 3 from coming off the drive pulley 1, it is necessary to apply a predetermined force to at least a slack and slightly curved belt portion.

FIG. 4 shows a tension member 10 for applying a force to the drive belt 3 according to the present invention, and the tension member 10
FIG. 6 is a cross-sectional view showing a configuration of a holding member 6 that guides the holding member 6 in a predetermined direction. The tension member 10 includes a pair of slide pins 1.
0b, 10b, a cylindrical member 10d which is loosely fitted to the slide pins 10b, 10b and comes into contact with the outer surface of the drive belt 3, and an elastic member 10c connected to the pair of slide pins. The holding member is a holding portion 6 that holds the tension member 10 and has a substantially U shape in cross section.
c, two guide projections 6b, 6b set to be longer than the longitudinal direction of the holding section 6c and guiding the two slide pins 10b, 10b, and the holding sections provided at both ends of the guide projections 6b, 6b. And two stoppers 6a, 6a which can be engaged with both longitudinal ends of the portion 6c.

As shown in FIG. 1, a projecting piece 6e is provided at the end of the substantially U-shaped holding section 6c in cross section so that the holding section 6c can smoothly move on the guide projections 6b. A groove 6f is provided below the guide projections 6b, 6b to engage with the projection 6e. That is, the holding member 6c holding the tension member 10 therein is movable on the guide protrusions 6b while sliding in the groove 6f.

Next, the operation of the tension member 10 of the present invention will be described. As shown in FIG. 2, when the drive pulley 1 rotates forward, the tension of the belt portion flowing in the direction of the drive pulley 1 and the tension of the belt portion flowing in the direction of the driven pulley 2 are compared. The belt portion on the side flowing in the direction becomes larger. Therefore, the belt portion on the side flowing in the direction of the drive pulley expands outward and presses one of the slide pins 10b. A slight tension acts on the belt portion on the side flowing in the direction of the driven pulley 2, and presses the other slide pin 10b. However, as a result, the tension of the belt portion on the side flowing in the direction of the drive pulley 1 is higher, so that the holding member 6c moves in the direction of the thick arrow in FIG. FIG. 3 shows a state in which the driving pulley 1 is reversed, in which case the holding member 6c moves in the direction of the thick arrow in FIG.

On the upper surface of the holding member 6c, there are provided long holes 6d, 6d through which the slide pins 10b, 10b are inserted. The length of the long holes in the longitudinal direction is as shown in FIG. It is set longer than the diameter of 10b. Therefore, the slide pins 10b, 10b and the long holes 6
A gap can be formed between the belt portion d and 6d, and the gap allows the fluid to flow in the direction of the belt portion on both sides, that is, the side that flows in the direction of the drive pulley, and the driven pulley in the claims of the present invention. The pair of slide pins 10b, 10b that sandwich the belt portion on the side can be pressed equally on both sides by a predetermined force of the elastic member 10c. As shown in FIG. 4, a pair of slide pins 10b, 10b are pushed by a drive belt and engage with the long holes 6d to hold the holding portions 6c.
The holding portion 6c can move very smoothly, but does not stop until one end engages with the stopper 6a due to inertia.

The cylindrical members 10d, 10d are not always necessary, and the drive belt may be brought into direct contact with the pair of slide pins 10d, 10d. But cylindrical member 1
When 0d and 10d are present, the cylindrical member also rotates with the movement of the drive belt, so that the loss of transmission efficiency is smaller. The holding member may be of any type as long as it can be moved by the tension of the drive belt while holding the tension member. The stoppers 6a, 6a may be provided as in the present embodiment, but the pair of slide pins are formed by the elongated holes 6d, 6d.
The slot is not necessarily required because the slot functions as a stopper for the holding portion 6c. Further, the protrusions 6e, 6e and the grooves 6f, 6f may be provided, but any structure may be used as long as the holding member 6c can move smoothly.

[0019]

As described above, according to the present invention, a pair of slide pins sandwiching both sides of a drive belt and an elastic member connected between the pair of slide pins apply a force to the drive belt. By providing the tension member and the guide member that movably holds the tension member by the tension of the drive belt, the maximum force is not applied to the belt portion on the side that flows in the direction of the drive pulley as compared with the related art. Therefore, it is possible to prevent the brake from being applied to the drive belt as much as possible, and it is possible to avoid a loss of power consumption and an increase in size of a drive mechanism such as a motor.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a decorative body driving device according to the present invention.

FIG. 2 is a plan view of a main part of the decorative body driving device according to the present invention, showing a state where a driving pulley is normally rotated.

FIG. 3 is a plan view showing a main part of the decorative body driving device according to the present invention, showing a state in which a driving pulley is reversed.

FIG. 4 shows a decorative body driving device according to the present invention, which is shown in FIG.
FIG. 4 is a cross-sectional view as seen from the arrow E and an arrow FF shown in FIG. 3.

FIG. 5 is a sectional view showing a conventional decorative body driving device.

FIG. 6 is a plan view of a main part of the conventional decorative body driving device, showing a state in which a driving pulley is normally rotated.

FIG. 7 is a plan view of a main part showing a conventional decorative body driving device and showing a state in which a driving pulley is reversed.

FIG. 8 shows a conventional decorative body driving device,
FIG. 8 is a cross-sectional view as viewed in the direction of the arrow B, and a cross-sectional view as viewed in the direction of the arrow CC in FIG. 7.

9 shows a conventional decorative body driving device,
FIG. 8 is a cross-sectional view as viewed in the direction of the arrow A, and a cross-sectional view as viewed in the direction of the arrow D-D shown in FIG. 7.

[Explanation of symbols]

 Reference Signs List 1 drive pulley 2 driven pulley 3 drive belt 4 motor 5a, 5b decorative body 6 holding member 6a stopper 6b guide protrusion 6c holding portion 6d long hole 6e protruding piece 6f groove 10 tension member 10a fixing support stand 10b slide pin 10c elastic member 10d Cylindrical member 10e Guide projection 10f Slot

Claims (1)

[Claims] 1. A decorative body driving device for driving a decorative body by driving an endless drive belt around a drive pulley and a driven pulley that can be rotated forward and backward, comprising: a pair of slide pins that sandwich both sides of the drive belt; A decorative member comprising: a tension member including an elastic member connected between the pair of slide pins; and a holding member that movably holds the tension member by the tension of the drive belt. Drive.