JP4814693B2 - Automatic switchgear - Google Patents

Description

  The present invention relates to an automatic opening / closing device that opens and closes a toilet seat and a toilet lid provided in a Western-style toilet with a driving force of a motor.

  In an automatic opening and closing device provided in a Western-style toilet, conventionally, in order to reduce driving noise, a worm gear having two or more teeth is provided on the output shaft of a motor that is a power source, and rotation of the worm gear is performed. There is one that receives a helical gear provided at the first stage of the reduction gear mechanism and transmits it to the opening / closing support shaft of the toilet seat / toilet lid (see, for example, Patent Document 1).

  However, in the automatic opening / closing device described in Patent Document 1, since the output shaft of the motor and the rotation shaft of the gear train of the reduction gear mechanism are directed in different directions, it is difficult to make the device compact and lightweight. . Therefore, the present applicant has proposed an automatic opening / closing device having a structure in which the output shaft of the motor and the rotation shaft of the gear train of the reduction gear mechanism are parallel to each other (see, for example, Patent Document 2).

Japanese Patent Laid-Open No. 10-262867 International Publication No. 03/065866 Pamphlet

  According to the automatic opening / closing device described in Patent Document 1, noise reduction can be achieved, and according to the automatic opening / closing device described in Patent Document 2, a reduction in size and weight can be achieved. It should be possible to obtain an automatic switching device that is compact, light in weight, and quiet in operation. However, as described in Patent Document 1, since the directions of the rotation shaft of the worm gear and the rotation shaft of the helical gear are different from each other, it is difficult to combine the invention described in Patent Document 1 and the invention described in Patent Document 2. Met.

  The problem to be solved by the present invention is to reduce the size, weight and noise of an automatic opening / closing device for a toilet seat and toilet lid.

The automatic opening and closing device of the present invention includes a motor in which a worm gear having two or more teeth is attached to a rotating shaft, an output shaft that opens and closes a toilet seat and a toilet lid, and the rotation of the worm gear is decelerated to the output shaft. A transmission reduction gear mechanism,
The reduction gear mechanism has a plurality of plates arranged in parallel with at least one support member interposed therebetween, and a gear group arranged between the plates,
The gear group includes at least a first helical gear that rotates in mesh with the worm gear, a sub worm gear that rotates in conjunction with the first helical gear, and a second helical gear that rotates in mesh with the sub worm gear. And ,
The support shafts of the gear group excluding the support shafts of the first helical gear and the auxiliary worm gear are supported on the plurality of plates, and the support shafts of the first helical gear and the auxiliary worm gear are supported on the support member. It is characterized by that.

  With such a configuration, the speed is reduced by the worm gear and the sub worm gear that transmit the rotational force by the frictional force, so that the noise can be reduced. Further, since the direction of the rotating shaft of the motor is changed by 90 degrees after the meshing of the worm gear and the first helical gear and the meshing of the auxiliary worm gear and the second helical gear, the first helical gear is changed by 90 degrees. Further, the support shafts of other gear groups excluding the support shaft of the auxiliary worm gear and the rotation shaft of the motor can be arranged in the same direction. It is possible to consolidate the gear group, and it is possible to reduce the size and weight.

Further , the support shafts of the gear group excluding the support shafts of the first helical gear and the auxiliary worm gear are axially supported by the plurality of plates, and the support shafts of the first helical gear and the auxiliary worm gear are supported by the support member. by the supporting, it is possible to consolidate the bearing of other gears of the spindle except for the first helical gear and the auxiliary worm gear shaft, compact, effective in weight reduction.

  On the other hand, if the rotating shaft of the motor is held by only one of the plurality of plates, the load applied to the worm gear can be reduced.

  Further, if a holding mechanism that holds the distance between the worm gear and the first helical gear is provided, the meshing accuracy between the worm gear and the first helical gear can be improved, so that the backlash amount is reduced and the backlash is reduced. It is possible to reduce noise caused by the noise. Moreover, the increase in the torque cross can be prevented by improving the meshing accuracy.

  According to the present invention, the automatic opening / closing device for the toilet seat / toilet lid can be made compact, lightweight, and quiet.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a cross-sectional view showing an automatic opening / closing apparatus according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is a partially enlarged view of FIG.

  As shown in FIGS. 1 to 3, the automatic opening / closing device 10 of this embodiment includes a motor 13 having a worm gear 11 having two or more teeth attached to a rotary shaft 12, and a toilet seat / toilet lid (not shown). ) And a reduction gear mechanism 15 that reduces the rotation of the worm gear 11 and transmits it to the output shaft 14. The reduction gear mechanism 15 includes two plates 19 and 20 arranged in parallel with the three support members 16, 17 and 18 being sandwiched therebetween, and a gear group 21 including a plurality of gears arranged between the plates 19 and 20. ,have. The gear group 21 meshes with the first helical gear 22 that rotates in mesh with the worm gear 11, the auxiliary worm gear 24 that rotates in conjunction with the same spindle 23 as the first helical gear 22, and the auxiliary worm gear 24. A rotating second helical gear 25 is provided. Further, the support shafts 26 and 27 of the gear group 21 excluding the support shaft 23 of the first helical gear 22 and the auxiliary worm gear 24 are supported by a plurality of plates 19 and 20. The support shafts 23 of the first helical gear 22 and the auxiliary worm gear 24 are supported by the support members 16 and 18.

  When the rotating shaft 12 of the motor 13 rotates, the worm gear 11 rotates and the rotational force is transmitted to the first helical gear 22, and the auxiliary worm gear 24 arranged coaxially therewith rotates. The rotational force of the auxiliary worm gear 24 is transmitted to the second helical gear 25, and the gear 28 that is coaxially linked to the second helical gear 25 rotates. When the gear 29 that meshes with the gear 28 rotates, the output shaft 14 that is coaxially connected to the support shaft 27 of the gear 29 is driven to rotate.

  With such a configuration, the speed is reduced by the worm gear 11 and the sub worm gear 24 that transmit the rotational force by the frictional force, so that the noise can be reduced. Further, as shown in FIG. 3, the support shaft 23 of the first helical gear 22 and the auxiliary worm gear 24 is supported by the support members 16 and 18, and the meshing between the worm gear 11 and the first helical gear 22 and the auxiliary worm gear 24 are performed. Since the rotation of the rotating shaft 12 of the motor 13 is changed by 90 degrees due to meshing with the second helical gear 25, the rotation is further changed by 90 degrees and transmitted, so the supporting shaft 23 of the first helical gear 22 and the auxiliary worm gear 24 is transmitted. The support shafts 26 and 27 of the other gear group except for and the rotating shaft 12 of the motor 13 can be arranged in the same direction. For this reason, the gear group 21 can be integrated and the automatic opening / closing apparatus 10 can be made compact and lightweight.

  Further, since the support shafts 26 and 27 of the gear group 21 excluding the support shaft 23 of the first helical gear 22 and the auxiliary worm gear 24 are supported on the plurality of plates 19 and 20, the support shafts 26 and 27 of the other gear group 21 are supported. Since 27 bearings can be integrated, it is effective in reducing the size and weight. Furthermore, since the rotating shaft 12 of the motor 13 is held only by the plate 20, the load applied to the worm gear 11 can be reduced.

  Next, a holding mechanism that holds the inter-axis distance between the worm gear 11 and the first helical gear 22 will be described with reference to FIGS. 4 to 9 are schematic views showing an inter-axis distance holding mechanism between the worm gear 11 and the first helical gear 22.

  In the holding mechanism shown in FIG. 4, the shaft 30 between the worm gear 11 and the first helical gear 22 is pressed by pressing a bearing 30 attached to the tip of the rotary shaft 12 of the motor toward the first helical gear 22 with a leaf spring 31. Hold the distance.

  In the holding mechanism shown in FIG. 5, the bearing 30 attached to the tip of the rotating shaft 12 of the motor is gripped by a locking member 32 slidable on the guide slope 33, and the locking member 32 is held by a spring material 34. It is pressed in the direction of the rotating shaft 12 by a screw 35 with a mark. When the pressing force in the direction of the rotary shaft 12 is increased by the screw 35, the worm gear 11 moves toward the first helical gear 22 by sliding along the guide slope 33. Further, the spring 34 absorbs the change in the inter-axis distance between the worm gear 11 and the first helical gear 22. As a result, the distance between the shafts of the worm gear 11 and the first helical gear 22 can be maintained at an appropriate distance.

  In the holding mechanism shown in FIG. 6, the bearing 30 attached to the tip of the rotating shaft 12 of the motor is held by an O-ring 36. The O-ring 36 absorbs changes in the distance between the worm gear 11 and the first helical gear 22. Thereby, the distance between the worm gear 11 and the first helical gear 22 is maintained.

  In the holding mechanism shown in FIG. 7, the bearing 30 attached to the tip of the rotating shaft 12 of the motor is held by a spring material 37. The spring material 37 absorbs the change in the inter-axis distance between the worm gear 11 and the first helical gear 22. Thereby, the distance between the worm gear 11 and the first helical gear 22 is maintained.

  In the holding mechanism shown in FIG. 8A, the eccentric bearing 38 attached to the tip of the rotating shaft 12 of the motor is rotatably attached to the casing 39, so that the interaxial distance between the worm gear 11 and the first helical gear 22 is achieved. Adjust and hold. In this case, after the attitude of the eccentric bearing 38 is adjusted, the eccentric bearing 38 may be prevented from rotating with the screw 40 shown in FIG. 8B or the screw 41 shown in FIG. 8C.

  In the holding mechanism shown in FIG. 9A, the bearing 30 attached to the tip of the rotating shaft 12 of the motor is moved to the first helical gear 22 by the wedge member 42 and the sliding member 43 urged by the spring material 40. Press towards. The spring material 48 absorbs the change in the inter-axis distance between the worm gear 11 and the first helical gear 22. As a result, the inter-axis distance between the worm gear 11 and the first helical gear 22 is maintained.

  In the holding mechanism shown in FIG. 9B, the bearing 30 attached to the tip of the rotating shaft 12 of the motor is pressed toward the first helical gear 22 with a screw 44, whereby the worm gear 11 and the first helical gear 22 are pressed. The distance between the axes is adjusted and held.

  In the holding mechanism shown in FIG. 9C, the bearing 30 attached to the tip of the rotating shaft 12 of the motor is pressed toward the first helical gear 22 by the spring material 45 to thereby cause the worm gear 11 and the first helical gear. The distance between the shafts 22 is adjusted and held.

  In the holding mechanism shown in FIG. 9 (d), the bearing 30 attached to the tip of the rotating shaft 12 of the motor is pressed toward the first helical gear 22 by the spring material 47 locked to the screw 46. The distance between the worm gear 11 and the first helical gear 22 is adjusted and held.

  If the inter-axis distance holding mechanism as shown in FIGS. 4 to 9 is provided, the meshing accuracy between the worm gear 11 and the first helical gear 22 can be improved, so the backlash amount is reduced and the noise caused by the backlash. Can be reduced. Moreover, the increase in the torque cross can be prevented by improving the meshing accuracy. In this case, if a mechanism for pressing the worm gear 11 against the first helical gear 22 with an elastic body such as the leaf spring 31 or the spring members 34, 37, 40, 44, 46 or the O-ring 36, a constant backlash amount is always maintained. As a result, a smooth rotating operation can be achieved, and an increase in backlash due to tooth wear due to repeated operations can be suppressed. 4 to 9 are examples, and the present invention is not limited to these holding mechanisms.

  The automatic opening / closing device of the present invention can be widely used in Western-style toilets such as ordinary houses and public facilities.

It is sectional drawing which shows the automatic opening / closing apparatus which is embodiment of this invention. It is the sectional view on the AA line in FIG. FIG. 3 is a partially enlarged view of FIG. 2. It is a schematic diagram which shows the center distance holding | maintenance mechanism of a worm gear and a 1st helical gear. It is a schematic diagram which shows the center distance holding | maintenance mechanism of a worm gear and a 1st helical gear. It is a schematic diagram which shows the center distance holding | maintenance mechanism of a worm gear and a 1st helical gear. It is a schematic diagram which shows the center distance holding | maintenance mechanism of a worm gear and a 1st helical gear. It is a schematic diagram which shows the center distance holding | maintenance mechanism of a worm gear and a 1st helical gear. It is a schematic diagram which shows the center distance holding | maintenance mechanism of a worm gear and a 1st helical gear.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Automatic switchgear 11 Worm gear 12 Rotating shaft 13 Motor 14 Output shaft 15 Reduction gear mechanism 16, 17, 18 Support member 19, 20 Plate 21 Gear group 22 1st helical gear 23, 26, 27 Support shaft 24 Sub worm gear 25 2nd Helical gear 28, 29 Gear 30 Bearing 31
32 Locking member 33 Guide slope 34, 37, 45, 47, 48 Spring material 35, 40, 41, 44, 46 Screw 36 O-ring 38 Eccentric bearing 39 Casing 42 Wedge member 43 Sliding member

Claims (3)

A motor in which a worm gear having two or more teeth is attached to a rotation shaft, an output shaft that opens and closes a toilet seat and a toilet lid, and a reduction gear mechanism that decelerates the rotation of the worm gear and transmits it to the output shaft. Prepared,
The reduction gear mechanism has a plurality of plates arranged in parallel with at least one support member interposed therebetween, and a gear group arranged between the plates,
The gear group includes at least a first helical gear that rotates in mesh with the worm gear, a sub worm gear that rotates in conjunction with the first helical gear, and a second helical gear that rotates in mesh with the sub worm gear. And ,
The support shafts of the gear group excluding the support shafts of the first helical gear and the auxiliary worm gear are supported on the plurality of plates, and the support shafts of the first helical gear and the auxiliary worm gear are supported on the support member. An automatic opening and closing device characterized by that. Claim 1 Symbol placement of the automatic opening and closing device is characterized in that retaining the rotation shaft of the motor one only of a plurality of said plate. The automatic opening / closing apparatus according to claim 1 or 2 , further comprising a holding mechanism that holds an inter-axis distance between the worm gear and the first helical gear.

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