JPH0254078A - Speed regulator - Google Patents

Abstract

PURPOSE:To permit speeds to be regulated with good feeling by using a compact constitution in which the rotation of an input shaft with the movement of a movable body is speeded up by a speed-up means with a non-circular gear pair and transmitted to a speed regulator. CONSTITUTION:A speed regulator 10 which operates with the rotation of an input shaft 9 turning with movement of a movable body such as the cover or set of stool, door of refrigerator or building, etc., having a function of regulating the turning speed of the input shaft, is provided. A speed-up means 13 capable of changing speed-up ratios by using increasing the turning speed of the shaft 9 is set between the shaft 2 and the means 10, by which the rotation of the shaft 9 is speeded up and transmitted to the means 10. The movable body can thus be smoothly moved by changing speed-regulating action in a non-step changing manner.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention is applicable to toilet lids and seats, refrigerators and building doors,
The present invention relates to a speed regulating device that regulates the speed of a moving object such as a soft eject of a VTR.

(Prior Art) For example, a Western-style toilet bowl is provided with a toilet seat that is rotatably supported on a horizontally disposed support shaft. This toilet seat is rotatable between a horizontal position where it is in contact with the upper edge of the opening of the toilet bowl body and a vertical position where it is separated from the upper edge of the opening depending on the usage state of the toilet bowl. ing. If you let go of your hand in the middle of tilting it from the vertical position to the horizontal position, the toilet seat will fall and rotate due to its own weight and hit the top edge of the toilet, making a loud VR noise or, in the worst case, breaking it. .

In order to deal with this problem, a speed governor technology has been proposed that applies a brake to the rotation of a toilet seat as a moving object. For example, as proposed in Japanese Patent Publication No. 62-37975, an air cylinder or a brake shoe connected by a link is used.

(Problem N to be solved by the invention) Although the above device achieves the intended purpose,
For the method using the above air cylinder.

There is a problem with the hissing sound that air is released from the cylinder when it is activated. What is the link connection method?

There is a problem in that the device inevitably becomes bulkier. This is because the rotating shafts of commercially available toilet bowl lids and toilet seats are subject to a torque of approximately 20 kg/cm, so if you try to adopt a structure that can withstand this torque, each part will have to be strong. This is because you don't get it.

By the way, it is desirable for a moving body that moves at a controlled speed to have a slow final motion. The problem remains that even though the rotation speed is controlled, the rotation speed gradually increases as it approaches the horizontal position. This problem is not limited to toilet bowls, but also trash cans with lids and furniture with lids that open and close.

It also occurs in door closers, doors of refrigerators, etc., and soft ejects of VTRs.

(Means for Solving the Problems) The present invention aims to provide a speed governor that solves each of the above problems, and includes an input shaft that rotates in conjunction with the movement of a moving object, and A speed regulating means that operates in a driven manner and regulates the rotation of the input shaft, and a speed regulating means that is disposed between the speed regulating means and the input shaft and speeds up the rotation of the input shaft to control the rotation of the input shaft. The speed increasing means is characterized in that the speed increasing means is provided with non-circular gears that mesh with each other to change the speed increasing ratio of the speed increasing means.

(Function) When the input shaft rotates, the rotation of the input shaft is transmitted to the speed regulating means via the speed increasing means and operates this means. By operating the speed regulating means, rotation of the input shaft is controlled. At this time, the speed increasing ratio of the speed increasing means is changed by the non-circular gear and transmitted to the speed regulating means, and the speed is controlled while changing the rotational speed of the input shaft.

(Example) The present invention will be described in detail below based on an example in which the present invention is applied to a speed regulating device for a toilet seat and a toilet lid as movable bodies rotatably attached to a toilet bowl.

In FIG. 1, the base ends of a toilet seat 2 and a toilet lid 3 are rotatably attached to the top surface of the rear end of the toilet main body l. The provided shaft supports one end of the pivot axis of the toilet seat 2 and the toilet lid 3, and the shaft provided in the speed governor 5 (described later) supports the other end of the axis. The speed governor iI5 is fixed with mounting screws 7 (see FIG. 5) after mounting portions 6a, 6a formed at both ends of the case 6 are placed on the top surface of the toilet main body 1.

In FIGS. 2 to 9, the speed governor @5 includes a case 6, input shafts 8 and 9 with a part thereof protruding outside the case, and a speed governor 10 housed inside the case. Speed increasing means 13 including a one-way transmission clutch 11 and a non-circular gear pair 12
In the embodiment shown in FIG. 1, two input shafts 8 and 9 rotating on the same axis are used as the input shafts, since the speed of the toilet seat 2 and the toilet lid 3 as moving objects is controlled respectively. It is shown. The case 6 consists of a case body 6b and a case lid 6C that is fitted onto the case body 6b and then fixed with a tapping screw 15. In FIG. 2, reference numeral 15a indicates a screw hole formed in the case body.

Bearing hole 6ca formed in case lid 6c (see Fig. 4)
A tube shaft portion 9a of the input shaft 9 is inserted through the tube shaft portion 9a. The input shaft 8 is inserted through the tube shaft portion 9a, and its base end portion 8a is fitted into the bearing hole 6ba of the case body. The input shaft 9 is made to protrude from the cylindrical part 6cb of the case lid, and a cut-off part 9b for stopping rotation is formed on the outer peripheral surface of the protruding part 9c. The engagement hole 3a of the toilet lid 3, which is formed in a shape complementary to the cross-sectional shape of the protrusion 9c, is fitted into the protrusion 9c so as to be substantially integrated in the rotational direction (see FIGS. 8 and 9). (see figure), one end of the input shaft 8 is connected to the protrusion 9 of the input shaft 9.
It is made to protrude further from c.

A cutting portion 8c for stopping rotation is formed on the protruding portion 8b. The toilet seat 2, which has an engagement hole 2a with a complementary shape to the cross-sectional shape of the protrusion 8b, is fitted into the protrusion 8b so as to be substantially integrated in the rotating direction (see FIGS. 8 and 8). (See Figure 9).

No. 1 gears 16 and No. 1 gears 17 are integrally formed on the input shafts 8 and 9 located in the case 6, respectively, and spaced apart from each other. These No. 1 gears 16.17 may be formed separately from each input shaft and then fixed integrally with the input shafts. It consists of a partial spiral gear, which is a non-circular gear whose pitch circle gradually opens as it moves. As shown only in FIG. 2, the case body 6b has No. 1 gears 16 and 17
A stopper portion 6bb is formed to prevent overrun when the rotor rotates clockwise in FIG. 2. A No. 2 gear 19 that meshes with the No. 1 gear 16 and a No. 2 gear 20 that meshes with the No. 1 gear 17 are rotatably supported on a support shaft 18 formed in the case body 6b, spaced apart from each other. A tip 18a of the support shaft 18 is fitted into the case lid 6b. A large-diameter third gear 21 is rotatably supported on the support shaft between the second gears 19 and 20. The second gear 19,20 is a partial spiral gear having a smaller diameter than the first gear. 1st gear 16.17 and 2nd gear 19.2
0 means that the toilet seat 2 and the toilet lid 3 are disengaged from each other at the end of rotation (approximately 80 degrees from the vertical position) just before they are placed in the horizontal position, and the rotation of the input shaft 8.9 is controlled by the speed regulating means IO. The operating angle of the toilet seat 2 and toilet lid 3 (
No. 1 gear 16.17 for opening angle from vertical position)
Figure 11 shows the gear ratio between the 1st gear and the 2nd gear 19.20, and as the 1st toilet seat 2 and the toilet lid 3 approach the horizontal position, the gear ratio increases analogously to 80° in the 1st rotation stage. This indicates that both gears become disengaged in the vicinity.

A ring 22.22 is fitted into the inner circumferential surface of the cylindrical portions 19a, 20a of the second gear 19.20, and a coil spring 23.23 which is given an expansion habit is applied to the inner circumferential surface of this ring. being brought into contact with This coil spring 23°23
One end is locked to the boss portion 21a of the third gear 21, and its free end is brought into contact with the inner circumferential surface of the ring together with the coil portion. The coil springs 23 and 23 are connected to the toilet seat 2 and the toilet lid 3, that is, the input shafts 8 and 9 that are substantially integral therewith.
However, when rotating in the direction shown by the solid line in Fig. 9, the rotational force of the No. 2 gear 19 and 20 is transmitted to the No. 3 gear 21. The toilet seat and toilet lid rotate in the direction shown by the broken line in Fig. 9. At this time, the rotation of the second gear 19.20 is in the direction of tightening the coil spring 23.23, and the rotational force of the input shaft is the rotation of the third gear 21.
In other words, the one-way transmission clutch 11 is constituted by the second gear 19, 20, the coil spring 23, 23, and the third gear 21. 2nd gear 20,
As shown only in FIG. 2, a stopper 24 (only one side is shown) that determines the rotation blocking position can be brought into contact with one side 20b, 19b of 19. This stopper 24 does not necessarily need to be provided.

The large-diameter third gear 21 is always meshed with the small-diameter fourth pinion 25. The No. 4 pinion 25 is integrally molded with a worm wheel 26 as a No. 4 gear, and is rotatably supported by a support shaft 27 formed in the case body 6b. A tip 27a of the support shaft 27 is fitted into the case lid 6c. The worm wheel 26 is constantly engaged with the worm 28. The worm 28 constitutes a part of the speed regulating means 10. The rotation of the input shafts 8 and 9 is
No. 1 gear 16, 17, No. 2 gear 19, 20. No. 3 gear 2
1st and 4th binions 25. The speed increasing means 13 consisting of the worm wheel 26 and the worm 28 increases the speed and transmits the increased speed to the worm.

This speed increasing means 13 speeds up the rotation of the input shaft and transmits it to the worm 28, thereby driving the worm to rotate at a high speed.

The worm 28 has a bearing fitted into the case body 6b, one end 28a of which is supported by a block 29, and a bearing hole 30a formed in a braking cup 30 fitted into the case body.
The other end 28b is supported so that it can rotate freely once. The bearing block 29 has a groove into which one end 28a is fitted, and a shaft holding piece 6d (see No. 5 @) formed on the case lid 6c is fitted into this groove to support the shaft end of the worm. . A ratchet 31 having an expanding habit is press-fitted into the worm 28, and the distal end of the arm 31a is elastically engaged with an engagement recess 32a formed on one end surface of the friction member receiver 32. The friction member receiver 32 is loosely fitted into the worm 28. The ratchet 30 and the friction member receiver 32 constitute a torque limiter. A stopper 33 is engaged with the worm 28, and a friction member 34 made of rubber or rubber-like material is loosely fitted between the shaft and the friction member receiver 32. As shown in FIGS. 2 and 6, this friction member 34 includes an arm portion 34a extending from the boss portion in three directions, and a weight portion 34a extending from the arm portion along the inner circumferential surface of the cup 30.
It consists of b. A pin 32b formed to extend in the axial direction from the friction member receiver 32 is engaged with the arm portion 34a. Therefore, the friction member receiver 32 and the friction member 34 are connected by the pin 32b, so that they are integral in the rotational direction.

The friction member 34 is arranged so that its weight portion is close to the inner peripheral surface of the braking cup 30. When the worm 28 rotates at high speed, the weight portion 34b of the friction member slides against the inner circumferential surface of the cup due to centrifugal force to brake the rotation of the worm and regulate its speed. The control applied to the worm 28 is a brake on the gear train that rotationally drives it, that is, the input shafts 8 and 9.
Acts as a speed regulator. Warm 28. Friction member 34
and the braking cup 30 constitute speed regulating means IO 6
FIG. 12 shows the relationship between the closing speed and the operating angle when rotating the toilet seat or toilet lid from the vertical position to the horizontal position. Since the speed regulating means 10 is not effective up to about 10° from the vertical position, The closing speed increases at a steep angle, but after that, the speed regulating action of the speed regulating means increases due to the increase in the gear ratio of the 1st gear and the 2nd gear, so the closing speed gradually becomes slower and the rotation speed increases. At around the final stage of 80°, the first gear 16, 17 and the second gear 19, 20 are disengaged, so the regulating action is released and the gears close rapidly. However, since the rotation distance after the end of the 9th rotation is short, no large impact will be applied to the toilet seat or toilet lid.

The operation of the embodiment configured as described above is performed when the toilet lid 3 placed in the vertical position (open position) as shown by the chain line in FIG. 9 is rotated to the horizontal position (closed position) as shown by the solid line. This will be explained using an example. When the toilet lid 3 is in the vertical position, the first
The gear 17 and the second gear 20 are, as shown in FIG. 1O,
They have an interlocking relationship.

Now, when the toilet lid 3, which is located at the chain line position in FIG. 9, is rotated in the direction shown by the solid line arrow, the input shaft 9 rotates clockwise in FIG. The second gear 20, which is engaged with the second gear 20, is rotated counterclockwise. When the second gear 20 rotates, the coil spring 23 of the one-way transmission clutch 11 is expanded to integrate the second gear 20 and the third gear 21. This causes the third gear 21 to change to the fourth gear 25. The worm wheel 26 is rotated at increased speed. This worm wheel 26 causes the worm 28 to rotate at a higher speed.

As the operating angle when the toilet lid 3 is closed gradually increases, the gear ratio of the No. 1 gear 17 and the No. 2 gear 20 gradually increases, as shown in FIG. 13 also increases the rotation transmission speed.

When the worm 28 rotates at high speed, the friction member 34 rotates via the torque limiter, and its weight portion 34b expands in the centrifugal direction due to centrifugal force and slides against the inner peripheral surface of the cup 30, causing the worm to rotate. Apply the brakes.

The braking applied to the worm 28 is transmitted as a regulating force to the input shaft 9 via the speed increasing means 13, thereby applying a brake to the closing speed of the shaft 9, that is, the toilet lid 3. Warm 2
The rotation of the input shaft 9 gradually increases as the gear ratio changes with the rotation angle of the input shaft 9.
The braking force increases gradually. Therefore, 1 lid 3
As shown in Figure 12, the closing speed of the gear increases rapidly up to the operating angle of about 10" at the beginning of closing as it waits for the gear train to start up, but after that it gradually slows down as the braking force begins to take effect. When the operating angle of the sixth toilet lid 3 changes to around 80 degrees at the end of rotation, that is, when the first toilet lid 3 rotates to the point where it is just about to close, the second gear 20 changes as shown in FIG. The side edge 20b collides with the stopper 24 to prevent its rotation, and the first gear 17 and the second gear 20
Since the engagement with the input shaft 9 is disengaged, no braking force is applied to the input shaft 9. for that.

The toilet lid 3, which is substantially integral with the input shaft 9, rotates the remaining approximately 10 degrees at a high speed without braking, and rotates to a horizontal position where it comes into contact with the toilet seat 2 and stops. Even if it rotates through a degree angle without braking, the height it moves is small, so it descends without a big impact.

In this horizontal position, the toilet lid 3 is placed on the toilet seat 2 with its cushion 3
b, 3b (see FIG. 1), the toilet seat 2 is held in contact with the upper surface of the toilet main body 1. Note that if the stopper 24 is not provided and the non-circular gear pair 12 is configured to constantly mesh, the input shaft 9 will slowly rotate downward even after 80 degrees, which is the final stage of rotation.

For the toilet lid 3 which rotates under its own weight in the closing direction.

When this is forcibly rotated, the input shaft 9
This will forcefully drive the gear train No. 3 into rotation.

At this time, the worm 28 is rotated at high speed, so
This is braked by the friction member 34, but when the friction force between the friction member and the cup 30 exceeds a predetermined value, the arm portion 3La of the ratchet 31 is bent and engaged with the engagement recess 32a of the friction member receiver 32. is removed and the worm 28 is allowed to rotate, thereby avoiding overload on the speed increasing means 13 including the worm 28. Therefore, the toilet lid 3 can be rotated without being subjected to braking by the regulating means lO.
Even at this time, the meshing relationship between the first gear 17 and the second gear 20 does not change.

Therefore, the first gear 17 and the second gear 20 can be logarithmic gears.

Next, the operation when the toilet lid 3 placed in the horizontal position (closed position) shown by the solid line in FIG. 9 is rotated toward the vertical position (opened position) shown by the chain line will be explained.

At this time, the first gear 17 and the second gear 20 are in a disengaged state as shown in FIG.
When the toilet lid 3 is rotated in the direction shown by the dashed arrow (see FIG. 9), the input shaft 9 is rotated counterclockwise in FIG. 2. At the beginning of rotation of the input shaft, the first gear 17 and the second gear 20 do not mesh with each other, but when the input shaft rotates approximately 10 degrees, both gears mesh with each other and try to rotate the gear train of the speed increasing means 13.

However, the second gear 20 that rotates clockwise is connected to the coil spring 23 of the one-way transmission clutch 11 (see FIG. 3).
Since the spring acts in the direction of winding and tightening, this spring cannot rotate the third gear 21. Therefore,
Since the braking force of the regulating means 10 does not act on the rotation of the input shaft 9, the toilet lid 3 that is rotating in the opening direction can be opened with a light force. Furthermore, when you start opening the toilet lid,
The coil spring 23 causes the third gear 21 to rotate, but this rotation is immediately blocked.

That is, the worm wheel 26, which is rotated by the third gear 21 and the fourth pinion 25, has a worm 28 engaged therewith, which is pushed downward in FIG. As the third gear 2 is pressed against the end 29b, its rotation is prevented.
1 is prevented from rotating.

If the rotation of the third gear 21 is blocked, the coil spring 23 and the second gear 20 will slip, causing the input shaft 9
Rotation transmission between the speed regulating means 10 and the speed regulating means 10 is released. Toilet lid 3
rotates to the vertical position, the first gear and the second gear
Located as shown in Figure 0. At this time, if the toilet lid 3 rotates too much, the first gear 17 abuts the toilet lid 3 against a stopper 6bC (see FIG. 2) formed on the case body.

The above is an explanation of the action when opening and closing the toilet lid 3, but the action when opening and closing the first toilet seat 2 is also the same, and in this case, the input shaft 8 and the No. 1 gear 16 rotate, and the No. 2 gear that is linked thereto 16
The gear train rotates. Moreover, the effect is the same when one toilet seat and the toilet lid are rotated at the same time.

Note that in the above-described embodiments, the toilet seat and the toilet lid are used as speed-regulating moving objects, but the present invention does not.

It can also be applied as a speed regulating device for rotating moving objects such as refrigerator doors, building doors, video cassette soft ejectors, and the like. By connecting the input shaft to a linearly reciprocating moving body and rotating the input shaft, it is also possible to control the speed of such a moving body. Further, although the illustrated embodiment has a dual input shaft as an example, it is also possible to use only one input shaft. In this case, the structure becomes simpler and more compact. Furthermore, since the input shaft in the illustrated embodiment constitutes one end of the rotation center axis of the movable body, the speed governor can be easily removed, and parts replacement due to deterioration of the friction member is extremely difficult. It's easy to do.

In the illustrated embodiment, the gear ratio increases in the speed increasing direction of the speed increasing gear train in the combination of non-circular gear pairs, but if this is reversed, the rotation of the input shaft increases. Since speed control can be performed in which the speed increasing ratio decreases as the speed increases, in other words, the braking effect due to speed control decreases, such a gear configuration may be adopted depending on the type of the speed controlled moving body.

(Effects of the Invention) As described above, according to the speed governor of the present invention, since the speed increasing means including the non-circular gear is used, a compact configuration is possible, and the rotation of the input car by the speed governor is possible. Since the speed changes, a continuously variable speed regulating action can be performed, and a speed regulating device with a good feeling can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a toilet bowl equipped with the speed governor of the present invention, FIG. 2 is a side view showing an embodiment of the speed governor of the present invention, and FIG. 3 is a plan sectional view of the same. FIG. 4 is a longitudinal sectional front view of the same as the above, FIG. 5 is a partial sectional rear view of the same as the above, FIG. 6 is a bottom view showing an example of a speed regulating means, and FIG. 7 is a bottom view showing an example of a torque limiter. Fig. 8 is a partially cross-sectional exploded plan view showing an example of the manner in which the input shaft and the movable body are connected, Fig. 9 is a side view illustrating the rotational position of the movable body, and Fig. 10 shows the movable body in the vertical position. Side view showing the position of the input shaft and related members when placed, first
FIG. 1 is a diagram showing changes in the gear ratio of the gear train in the embodiment shown in FIG. 2, and FIG. 12 is a diagram showing changes in the moving speed of the same moving body. 2.3...Toilet seat and toilet lid as moving objects, 8,9...
Input shaft, lO... Speed governor, 11... One-way transmission clutch, 12... Non-circular gear pair. 13...speed increasing means. rW51 )'P)G mouth

Claims (1)

[Claims] An input shaft that rotates in conjunction with the movement of a moving body, a speed governor that operates in response to the rotation of the input shaft and controls the rotation of the input shaft, and the speed governor and the input shaft. and speed increasing means for increasing the rotation speed of the input shaft and transmitting the same to the speed regulating means, and the speed increasing means is provided with non-circular gears that mesh with each other to increase the rotation speed of the input shaft. A speed governor characterized by changing the speed increasing ratio of a speed means.