JP2020097981A - Drain valve driving device - Google Patents

Abstract

To restrain intrusion of water or foreign matters to a case storing an output member to which a drain valve driving member such as a wire is connected and a driving part in a drain valve driving device.SOLUTION: A drain valve driving device 1 includes: a wire 10 to which a drain valve is connected; a pulley 11 connected to the wire 10; a motor 40 and a gear unit 2 for driving the pulley 11; and a case 20 for storing the pulley 11, the motor 40, and the gear unit 2. A water-repellent portion 24 is provided on an edge of an opening 23 for drawing the wire 10 to the outside of the case 20. Further, a connection portion between a first case 21 and a second case 22 is a fitting portion in which a first step 213 and a second step 223 are fitted, and a distal end of a second case cover 212 covering the fitting portion from the first case 21 side extends closer to the second case 22 side (+Z direction) than the first step 213 constituting the fitting portion.SELECTED DRAWING: Figure 6

Description

The present invention relates to a drain valve drive device that opens and closes a drain valve.

2. Description of the Related Art As a drain valve driving device for opening and closing a drain valve of a washing machine or the like, there is one that includes a drain valve driving member connected to the drain valve and a geared motor driving the drain valve driving member. Patent Document 1 discloses a drain valve drive device including a wire as a drain valve drive member. In Patent Document 1, the geared motor includes a case, a motor housed inside the case, and a transmission train wheel. The driving force of the motor unit is transmitted to the pulley that is an output member by the transmission train wheel.

JP, 2018-26938, A

In the drain valve driving device of Patent Document 1, the pulley that winds the wire is arranged outside the case of the geared motor. The pulley meshes with an output pinion arranged in the opening of the geared motor case. A cover case that covers the pulley is fixed to the case.

As described in Patent Document 1, a drain valve drive device in which a pulley, which is an output member, is arranged outside a case that houses a motor and a transmission train wheel and is housed in a cover case is a device whose height is equal to the case height and cover case. Since the height is the sum of the height and the height, there is a problem of increasing the size. Therefore, a structure has been proposed in which a pulley is housed in a case that houses a motor and a transmission train wheel. When the pulley is housed in the case that houses the motor and the transmission train wheel, it is necessary to provide the case with an opening for drawing out the wire.

However, if an opening that draws out the drain valve drive member such as a wire is provided in the case that houses the motor and the transmission train, water and foreign matter may enter through the opening, and the internal transmission train and motor may malfunction. May occur.

In view of such a point, an object of the present invention is to provide a drainage valve drive device including a drainage valve drive member to which a drainage valve is coupled, and a case for housing an output member to which the drainage valve drive member is coupled and a drive unit It is to suppress the intrusion of water and foreign substances into the water.

In order to solve the above problems, a drain valve driving device of the present invention is a drain valve driving member to which a drain valve is connected, an output member to which the drain valve driving member is connected, and a drive unit for driving the output member. And a case that accommodates the output member and the drive unit, the case including a first case and a second case facing each other in a first direction, and the first case includes a first side wall portion. An opening in which the first side wall is cut out, a drainage part protruding from an outer peripheral surface of the first side wall along an edge of the opening, and a side of the second case from the first side wall. A second case covering portion extending to the first case side wall, and a first step portion extending along an end of the first side wall portion inside the second case covering portion. A second side wall portion connected to the side wall portion is provided, a second step portion that is fitted to the first step portion is provided on the second side wall portion, and a direction from the first case toward the second case is When the one side is in the first direction, the tip of the second case cover is located on one side in the first direction with respect to the first step.

As described above, according to the present invention, since the drainage part is provided at the edge of the opening for drawing out the drainage valve drive member to the outside of the case, water or foreign matter is unlikely to enter through the opening. Therefore, even when the output member to which the drain valve drive member is connected is housed in the same case as the drive unit, it is possible to prevent water or foreign matter from entering the case. In addition, the connecting portion between the first case and the second case is a fitting portion in which the first step portion and the second step portion are fitted, and the fitting portion is covered from the first case side. The tip of the second case cover portion extends to the second case side (one side in the first direction) with respect to the first step portion forming the fitting portion. Therefore, even if water is splashed from the first case side, the water does not reach the fitting portion, and even if water is splashed from the second case side, the water does not easily reach the fitting portion. Therefore, it is difficult for water or foreign matter to enter through the connection between the first case and the second case. As described above, since it is possible to effectively suppress the entry of water or foreign matter into the case, it is possible to suppress malfunctions due to the entry of water or foreign matter.

In the present invention, it is preferable that a sealant is applied to a gap between the first step portion and the second step portion. Accordingly, it is possible to more effectively suppress intrusion of water or foreign matter from the connection portion (the fitting portion between the first step portion and the second step portion) between the first case and the second case.

In the present invention, the second step portion includes an inner concave portion that is recessed on an inner peripheral side of an end surface of the second side wall portion on the other side in the first direction, and the first step portion is fitted to the inner concave portion. It is preferable to provide an inner convex portion that does. When the unevenness of the fitting surface is arranged in such a manner, the distance between the fitting surface and the tip of the second case cover can be increased as compared with the case where the unevenness is reversed. Therefore, when water splashes from the second case side, it is difficult for water to reach the fitting portion. Therefore, invasion of water or foreign matter can be effectively suppressed.

In the present invention, a plate disposed between the opening and the output member is provided, the plate faces the opening, and the drain valve driving member is passed through a penetrating portion that penetrates the plate. It is preferable. With this configuration, even if water or foreign matter may enter through the opening, the plate prevents the water or foreign matter from entering, so that the water or foreign matter does not easily reach the output member or the drive unit. Therefore, it is possible to suppress malfunction of the output member and the drive unit due to the intrusion of water or foreign matter.

In the present invention, it is preferable that a sealant that seals a gap between the plate and the drain valve driving member is applied to the penetrating portion. This makes it difficult for water or foreign matter to enter the output member or the drive unit side through the gap between the plate and the drain valve drive member. Therefore, it is possible to suppress malfunction of the output member and the drive unit due to the intrusion of water or foreign matter.

In the present invention, it is preferable that the drain valve driving member is a wire and the output member is a pulley around which the wire is wound. In this way, by using the flexible wire as the drain valve driving member, it is possible to change the pulling-out direction of the wire within a range in which it does not contact the opening. Therefore, the degree of freedom in arranging the drain valve drive device increases. Further, even if the positional accuracy when fixing the drain valve driving device 1 is low, the drain valve can be opened and closed via the wire.

According to the present invention, since the drainage part is provided at the edge of the opening for drawing out the drainage valve drive member to the outside of the case, it is difficult for water or foreign matter to enter through the opening. Therefore, even when the output member to which the drain valve drive member is connected is housed in the same case as the drive unit, it is possible to prevent water or foreign matter from entering the case. In addition, the connecting portion between the first case and the second case is a fitting portion in which the first step portion and the second step portion are fitted, and the fitting portion is covered from the first case side. The tip of the second case cover portion extends to the second case side (one side in the first direction) with respect to the first step portion forming the fitting portion. Therefore, even if water is splashed from the first case side, the water does not reach the fitting portion, and even if water is splashed from the second case side, it is difficult for the water to reach the fitting portion. Therefore, it is difficult for water or foreign matter to enter through the connection between the first case and the second case. As described above, since the entry of water or foreign matter into the case can be effectively suppressed, it is possible to prevent malfunction due to the entry of water or foreign matter.

It is a perspective view of a drain valve drive device to which the present invention is applied. It is a disassembled perspective view of the drain valve drive device of FIG. It is a top view of the drainage valve drive which removed the 1st case. It is the perspective view which looked at the 1st case from one side of the 1st direction. It is a partial cross-sectional view (cross-sectional view of the AA position in FIG. 1) of the drainage valve drive storage device. FIG. 3 is a partial cross-sectional view (cross-sectional view taken along the line BB in FIG. 1) of a connection portion between the first case and the second case. It is the partial perspective view which looked at the 2nd case, a pulley, a plate, and a wire from the other side of the 1st direction. It is explanatory drawing which shows typically the arrangement|positioning of the pulley and the wire position control part seen from the opening side.

(overall structure)
Hereinafter, a drain valve drive device 1 according to an embodiment of the present invention will be described with reference to the drawings. 1 is a perspective view of a drain valve driving device 1 to which the present invention is applied, and FIG. 2 is an exploded perspective view of the drain valve driving device 1 of FIG. The drain valve drive device 1 includes a drain valve drive member connected to a drain valve (not shown), an output member connected to the drain valve drive member, and a drive unit that drives the output member. In the present embodiment, the drain valve driving member is the wire 10 and the output member is the pulley 11. The pulley 11 rotates about a rotation axis extending in the first direction Z. The drain valve driving device 1 drives the drain valve via the wire 10 by rotating the pulley 11.

In this specification, the first direction Z, the second direction Y, and the third direction X are directions orthogonal to each other. Further, one side of the first direction Z is +Z direction, the other side is −Z direction, one side of the second direction Y is +Y direction, the other side is −Y direction, and one side of the third direction X is +X direction. , And the other side is the −X direction. The CW direction and the CCW direction are the CW direction and the CCW direction when the drain valve driving device 1 is viewed from the +Z direction side.

The drain valve drive device 1 includes a case 20, and the pulley 11 and the drive unit are arranged inside the case 20. The case 20 includes a first case 21 and a second case 22 that face each other in the first direction Z. The drive unit that rotates the pulley 11 is a geared motor including the motor 40 and the gear unit 2. The motor 40 is arranged at the bottom of the second case 22 arranged on one side of the first direction Z (+Z direction). The gear unit 2 and the pulley 11 are arranged on the other side (-Z direction) of the motor 40 in the first direction Z. The first case 21 covers the gear unit 2 and the pulley 11 from the other side in the first direction Z (−Z direction).

The gear unit 2 includes an output gear 54 integrally formed with the pulley 11, as described later. The end of the wire 10 is fixed to the pulley 11, and the wire 10 is wound in the groove 12 formed on the outer peripheral surface of the pulley 11. The wire 10 is drawn out of the case 20 through an opening 23 formed on the side surface of the case 20 and connected to a drain valve (not shown). In the present embodiment, the case 20 is made of resin, and the wire 10 is made of metal such as SUS. If the wire 10, which is the drain valve driving member, is made of a material harder than the case 20, it is possible to reduce the risk of the wire 10 breaking due to contact with the case 20.

As shown in FIG. 2, the pulley 11 is arranged on one side of the output gear 54 in the first direction Z (+Z direction). The pulley 11 and the output gear 54 are movable to a first rotation position (closed position) and a second rotation position (open position) located in the CCW direction with respect to the first rotation position. When the pulley 11 rotates in the CW direction, the wire 10 is paid out. When the pulley 11 is rotated to the first rotation position (closed position), the drainage valve connected to the wire 10 closes the drainage port. Further, when the pulley 11 rotates in the CCW direction, the wire 10 is wound up. When the pulley 11 rotates to the second rotation position (open position), the drain valve separates from the drain port and drainage is started.

The drain valve driving device 1 keeps the pulley 11 and the wire 10 in a state where the pulley 11 and the output gear 54 are moved to the second rotation position (open position) while continuing to energize the motor 40 that is the drive source. To do. Further, the drain valve driving device 1 can return the pulley 11 to the first rotation position (closed position) by an external force when the holding state of the pulley 11 and the wire 10 is released by stopping the energization of the motor 40. become. For example, the pulley 11 returns to the first rotation position via the wire 10 by the biasing force such as the spring force connected to the valve body of the drain valve, and the drain valve closes the drain port.

FIG. 3 is a plan view of the drain valve driving device 1 with the first case 21 removed. The gear unit 2 includes a transmission train wheel 50 that transmits the rotation of the motor 40 to the pulley 11, and a first clutch mechanism 60 (see FIG. 2) that disconnects the transmission of the rotational torque from the motor 40 to the transmission train wheel 50. When the external load is applied to the pulley 11 via the wire 10, the rotation restricting mechanism 70 that restricts the rotation of the transmission train wheel 50 to hold the output gear 54 and the pulley 11 and the transmission train wheel 50 transmit the rotation torque. The second clutch mechanism 80 is provided for switching between the state and the non-transmitted state. The transmission train wheel 50 includes a rotor pinion 51, a planetary gear mechanism 52, a reduction gear 53, and an output gear 54. The transmission train wheel 50 transmits the driving force of the motor 40 to the pulley 11 in this order.

(Case)
As shown in FIGS. 1 and 2, the opening 23 of the case 20 faces the second direction Y. One side (+Y direction) of the second direction Y is the inside of the case 20 when viewed from the opening 23, and one side (−Y direction) of the second direction Y is the outside of the case 20 when viewed from the opening 23. .. As shown in FIG. 2, the center of rotation of the pulley 11 is at a position displaced from the front surface of the opening 23 to the other side (−X direction) in the third direction X, and the groove 12 on the outer peripheral surface of the pulley 11 is opened. Located in front of 23. Therefore, the wire 10 extends from the front surface of the opening 23 to the opening 23.

FIG. 4 is a perspective view of the first case 21 as viewed from one side (+Z direction) of the first direction Z. FIG. 5 is a partial cross-sectional view (cross-sectional view taken along the line AA in FIG. 1) of the drain valve driving device 1, and is a cross-sectional view taken at the position of the opening 23. FIG. 6 is a partial cross-sectional view (cross-sectional view taken along the line BB in FIG. 1) of a connection portion between the first case 21 and the second case 22, and is a cross-sectional view cut at a position different from the opening 23. As shown in FIGS. 4 to 6, the first case 21 includes an upper plate portion 210 that covers the pulley 11 and the gear unit 2, and an outer peripheral edge of the upper plate portion 210 to one side in the first direction Z (+Z direction). A first side wall part 211 extending and a second case cover part 212 projecting from the outer peripheral surface of the first side wall part 211 and bent at one outer peripheral side of the first side wall part 211 and extending toward the second case 22 side (+Z direction). Prepare As shown in FIGS. 4 and 6, a first step portion 213 extending along the +Z direction end of the first side wall portion 211 is provided inside the second case cover portion 212. The first step portion 213 includes an inner convex portion 214 protruding in the +Z direction and an outer concave portion 215 recessed in the −Z direction on the outer peripheral side of the inner convex portion 214.

As shown in FIGS. 2, 3, and 6, the second case 22 includes a bottom plate part 220 and a second side wall part 221 extending from the outer peripheral edge of the bottom plate part 220 to the other side in the first direction Z (−Z direction). Equipped with. As shown in FIGS. 3 and 5, the bottom plate portion 220 includes a circular recess 222 that accommodates the motor 40. As shown in FIGS. 2 and 6, a second step portion 223 that fits with the first step portion 213 of the first case 21 is formed at the end portion of the second side wall portion 221 in the −Z direction. The second step portion 223 includes an inner recess 224 that is recessed in the +Z direction, and an outer protrusion 225 that is formed by projecting the outer peripheral side of the inner recess 224 in the −Z direction.

The motor 40 is an AC synchronous motor. As shown in FIG. 5, the motor 40 includes a cup-shaped motor case 41, a support plate 42 attached to an end of the motor case 41 on the +first direction Z side, and a bobbin arranged inside the motor case 41. 43, a stator coil 44 wound around the bobbin 43, and a rotor 45 arranged on the inner peripheral side of the bobbin 43.

As shown in FIGS. 2 and 4, the first case 21 includes a rectangular opening 23 that is formed by cutting out the first side wall portion 211 and the second case cover portion 212. The first side wall portion 211 includes a flat surface portion 216 that constitutes a side surface of the first case 21 in the −Y direction, and the second case cover portion 212 includes a flat surface portion 217 that extends from the flat surface portion 216 in the +Z direction. The plane portions 216 and 217 extend in the third direction X. The opening portion 23 is a cutout portion obtained by cutting out the flat surface portion 216 and the flat surface portion 217. The first case 21 includes a water blocking portion 24 that projects in the −Y direction from the outer peripheral surfaces of the first side wall portion 211 and the second case cover portion 212 along the edge of the opening 23. In the present embodiment, the water blocking portion 24 is formed on the entire edge of the opening 23. An inclined surface 241 is provided on the outer peripheral surface of the tip portion of the water barrier 24. When the tip of the water receiving portion 24 is splashed with water, the water flows along the inclined surface 241 toward the base end side (+Y direction) of the drainage portion 24, so that the water is less likely to enter the opening 23.

When assembling the first case 21 and the second case 22 to form the case 20, as shown in FIG. 6, the first step portion 213 of the first case 21 and the second step portion of the second case 22 are formed. 223 is fitted to connect the first side wall portion 211 and the second side wall portion 221. At that time, the inner convex portion 214 of the first step portion 213 and the inner concave portion 224 of the second step portion 223 are fitted, and the outer concave portion 215 of the first step portion 213 and the outer side of the second step portion 223 are fitted together. The convex portion 225 is fitted. As a result, a connecting portion having a so-called spigot structure is formed.

In the present embodiment, among the step portions forming the spigot structure, the second step portion 223 provided in the second case 22 in which the motor 40 and the gear unit 2 are housed has a concave inner peripheral portion, The outer peripheral side is convex. Therefore, the position in the first direction Z of the fitting surface between the first case 21 and the second case 22 that is exposed inside the second case cover 212 is the position of the tip surface of the outer convex portion 225. Therefore, since the distance from the tip of the second case cover 212 in the +Z direction to the fitting surface is large, it is difficult for water to reach the fitting surface even when the case 20 is splashed with water from the +Z direction. A sealant such as grease is applied to the gap between the first step 213 and the second step 223. Therefore, the gap between the first side wall portion 211 and the second side wall portion 221 is sealed with the sealant, so that even if water is splashed on the fitting surface, it is difficult for water to enter the case 20.

When the first case 21 and the second case 22 are assembled, the outer peripheral side of the second side wall portion 221 of the second case 22 is covered with the second case cover portion 212. As shown in FIG. 6, the tip of the second case cover 212 on one side (+Z direction) in the first direction Z is located on one side (+Z direction) in the first direction Z with respect to the first step 213. .. In the present embodiment, the tip of the second case cover 212 on one side in the first direction Z (+Z direction) extends to the position of the bottom plate 220 of the second case 22, so that the entire second side wall 221 is formed. The second case cover 212 covers the outer peripheral side. As shown in FIGS. 5 and 6, a predetermined gap (for example, about 1 mm) is provided between the second side wall part 221 and the second case cover part 212. Therefore, the assemblability when assembling the first case 21 and the second case 22 is good.

When the first case 21 and the second case 22 are assembled, as shown in FIG. 1 and FIG. 5, the opening 23 is closed by the second side wall part 221 at the portion where the second case cover 212 is cut out. However, the cutout portion of the first side wall portion 211 becomes a penetrating portion that penetrates the case 20. Therefore, the wire 10 can be pulled out of the case 20 through the opening 23.

(plate)
As shown in FIGS. 2 and 5, the drain valve driving device 1 includes a flat plate 13 arranged between the opening 23 and the pulley 11. The plate 13 is made of, for example, a polyester film. A through portion 14 is formed in the plate 13, and the wire 10 is passed through the through portion 14. The wire 10 is movable in the second direction Y direction within the penetrating portion 14. Therefore, with the wire 10 passed through the penetrating portion 14, the wire 10 can be unwound and wound.

The plate 13 is arranged near the opening 23 and faces the opening 23 in the second direction Y. The plate 13 is larger than the opening 23 and is arranged in a posture substantially perpendicular to the second direction Y. Therefore, the plate 13 functions as a shielding member that shields water and foreign matter that try to enter the case 20 through the opening 23. A sealant such as grease that seals the gap between the wire 10 and the plate 13 is applied to the penetrating portion 14.

(Plate holding structure)
The plate 13 is held by the case 20 between the opening 23 and the pulley. The case 20 holds the plate 13 movably in the direction orthogonal to the second direction Y and restricts the moving range of the plate 13 in the direction orthogonal to the second direction Y (see FIGS. 3 and 4). (See) is provided. Since the wire 10 is passed through the penetrating portion 14 of the plate 13, the plate 13 functions as a guide member that guides the wire 10. The restricting unit 15 restricts the moving range of the wire 10 via the plate 13 so that the moving range of the wire 10 does not come into contact with each unit of the case 20. In the present embodiment, the regulation portion 15 regulates the movement range of the wire 10 via the plate 13 so that the movement range of the wire 10 does not come into contact with the inner peripheral edge of the opening 23 and the end portion of the second side wall portion 221 in the −Z direction.

As shown in FIGS. 3 and 4, the restriction portion 15 includes a first case-side restriction portion 16 formed in the first case 21 and a second case-side restriction portion 17 formed in the second case 22. The first case side restricting portion 16 is a protruding portion that protrudes in the +Z direction from the upper plate portion 210 of the first case 21, and includes a first groove portion 160 that extends in the third direction X. The second case side restricting portion 17 is a protruding portion that protrudes in the −Z direction from the bottom plate portion 220 of the second case 22, and includes a second groove portion 170 that extends in the third direction X. Both the first case side restriction portion 16 and the second case side restriction portion 17 are provided near the opening 23.

As shown in FIG. 5, when the first case 21 and the second case 22 are assembled, the first groove portion 160 and the second groove portion 170 face each other in the first direction Z. In the plate 13, one end (+Z direction) of the first direction Z is arranged in the first groove 160, and the other end (-Z direction) of the first direction Z is arranged in the second groove 170. It As shown in FIG. 5, the distance between the bottom of the first groove 160 and the bottom of the second groove 170 is larger than the height of the plate 13 in the first direction Z. Therefore, the plate 13 is movably supported by the first groove portion 160 and the second groove portion 170 in the first direction Z, and is movable in the first direction Z by the bottom portion of the first groove portion 160 and the bottom portion of the second groove portion 170. Is regulated. That is, the first groove portion 160 and the second groove portion 170 function as the first regulating portion 151 that regulates the movement range of the plate 13 in the first direction Z.

The first restricting portion 151 (the first groove portion 160 and the second groove portion 170) restricts the movement range of the wire 13 in the first direction Z by regulating the movement range of the plate 13 in the first direction Z. regulate. In the present embodiment, the movement range of the wire 10 in the first direction Z toward one side (+Z direction) is prior to the contact of the wire 10 with the −Z direction end of the second side wall part 221. Is regulated by coming into contact with the bottom of the second groove 170. In addition, the movement range of the wire 10 to the other side in the first direction Z (−Z direction) is such that the plate 13 has the first groove portion before the wire 10 comes into contact with the edge portion of the opening 23 in the −Z direction. It is regulated by contacting the bottom of 160.

As shown in FIG. 4, the first case side restricting portion 16 includes a first wall portion 161 extending in the third direction X on the +Y direction side of the first groove portion 160 and a third wall portion on the −Y direction side of the first groove portion 160. The second wall portion 162 extends in the direction X, and two third wall portions 163 that are bent and extend in the +Y direction from one end and the other end of the first wall portion 161 in the third direction X, respectively. The third wall portion 163 extends in the second direction Y at a position separated from the one end and the other end of the first groove portion 160 in the third direction X by a predetermined dimension, and is connected to the first side wall portion 211.

FIG. 7 is a partial perspective view of the second case 22, the pulley 11, the plate 13, and the wire 10 as viewed from the other side in the first direction Z (−Z direction). As shown in FIGS. 3 and 7, the second case side restricting portion 17 includes a first wall portion 171 extending in the third direction X on the +Y direction side of the second groove portion 170 and a −Y direction side of the second groove portion 170. In, the second wall portion 172 extending in the third direction X, and two third wall portions 173 that are bent and extend in the +Y direction from one end and the other end of the first wall portion 171 in the third direction X, respectively. As shown in FIG. 5, the first wall portion 171 and the second wall portion 172 are connected on the +Z direction side of the second groove portion 170. The third wall portion 173 extends in the second direction Y at a position separated from the one end and the other end of the second groove portion 170 in the third direction X by a predetermined dimension, and is connected to the second side wall portion 221.

As shown in FIGS. 4 and 5, the first case-side restricting portion 16 has a smaller projecting dimension (height in the first direction Z) from the upper plate portion 210 than the first side wall portion 211. On the other hand, as shown in FIG. 7, the second case side restricting portion 17 has a larger projecting dimension (height in the first direction Z) from the bottom plate portion 220 than that of the second side wall portion 221. A rectangular recess 18 recessed in the +Z direction is provided at the center of the second case side restricting portion 17 in the third direction X. The rectangular recess 18 is recessed to the same height as the tip of the second sidewall 221 in the −Z direction. Therefore, when the first case 21 and the second case 22 are assembled, the second case side restricting portion 17 is in a state in which the portions on both sides of the rectangular concave portion 18 in the third direction X protrude to the inside of the first case 21.

The rectangular recess 18 includes a first rectangular recess 181 formed in the first wall 171 and a second rectangular recess 182 formed in the second wall 172. As shown in FIG. 7, when the plate 13 is attached to the second groove portion 170 of the second case side regulation portion 17, the penetrating portion 14 through which the wire 10 is inserted is arranged inside the rectangular recess 18. The first wall portion 171 is connected to the second side wall portion 221 at two locations on one side and the other side of the first rectangular recess 181 in the third direction X, extending in the −Y direction.

When the first case 21 and the second case 22 are assembled, the third wall portion 163 of the first case side regulation portion 16 and the third wall portion 173 of the second case side regulation portion 17 face each other in the first direction Z. To do. The distance between the two third wall portions 163 in the third direction X is the same as the distance between the two third wall portions 173 in the third direction X, and the width of the plate 13 in the third direction X large. Therefore, when both ends of the plate 13 in the first direction Z are arranged in the first groove portion 160 and the second groove portion 170, the movement range of the plate 13 in the third direction X is limited by the third wall portion 163 and the third wall portion 173. Regulated. That is, the third wall portion 163 and the third wall portion 173 function as the second regulation portion 152 that regulates the movement range of the plate 13 in the third direction X.

The second restricting portion 152 (the third wall portion 163 and the third wall portion 173) restricts the movement range of the plate 13 in the third direction X, so that the wire 10 moves in the third direction X via the plate 13. Regulate the range. In the present embodiment, the movement range of the wire 10 in the one side of the third direction X (+X direction) is such that the plate 13 moves to the third wall before the wire 10 contacts the edge of the opening 23 in the +X direction. It is regulated by coming into contact with the portion 163 and the third wall portion 173. Also,
The movement range of the wire 10 to the other side (−X direction) in the third direction X is before the wire 10 comes into contact with the edge of the opening 23 in the −X direction, and the plate 13 moves to the third wall 163. It is regulated by coming into contact with the third wall portion 173.

Note that either the third wall portion 163 or the third wall portion 173 may be provided as the second restricting portion 152. Either one of the third wall portion 163 and the third wall portion 173 can regulate the movement range of the plate 13 in the third direction X. Therefore, the movement range of the wire 10 in the third direction X can be regulated via the plate 13.

(Wire position restriction unit)
As shown in FIG. 7, the second case 22 includes a wire position restricting portion 19 that projects between the second case side restricting portion 17 and the pulley 11 from the bottom plate portion 220 in the −Z direction. In the present embodiment, the wire position restricting portion 19 is a wall that linearly extends in the second direction Y, and is connected to the second wall portion 172 of the second case side restricting portion 17 on the +X direction side of the rectangular concave portion 18. .. Therefore, the wire position restricting portion 19 is arranged on the +X direction side of the wire 10.

FIG. 8 is an explanatory view schematically showing the arrangement of the pulley 11 and the wire position restricting portion 19 as seen from the opening 23 side (that is, the −Y direction). As described above, the wire 10 is arranged in the groove 12 provided in the pulley 11. The groove 12 is a groove having a substantially V-shaped cross section, which is opened on the outer peripheral surface of the pulley 11 and whose opening width in the first direction Z increases toward the outer peripheral side.

As shown in FIG. 8, there is a gap S in the third direction X between the wire position restricting portion 19 and the outer peripheral surface of the pulley 11, but the gap S is smaller than the wire diameter D. That is, the wire position restricting portion 19 is arranged at a position satisfying the condition of S<D.

Since the wire position restricting portion 19 is arranged on the +X direction side of the wire 10 from the groove 12 of the pulley 11 toward the opening 23, movement of the wire 10 in the +X direction is restricted by the wire position restricting portion 19. .. Therefore, even if the wire 10 is pulled in the +X direction outside the opening 23 and the pull-out direction of the wire 10 is tilted in the +X direction, the wire 10 moves to the +X direction side from the wire position restricting portion 19. There is no. Therefore, if the gap S between the wire position restricting portion 19 and the outer peripheral surface of the pulley 11 in the third direction X is made smaller than the wire diameter D, even if the pulling-out direction of the wire 10 is inclined to the +X direction, The wire 10 does not come off the groove 12 completely. Therefore, by providing the wire position restricting portion 19, it is possible to prevent the wire 10 from coming off the pulley 11.

(Main effects of the present invention)
As described above, the drain valve driving device 1 of the present embodiment drives the wire 10, which is the drain valve driving member connected to the drain valve, the pulley 11, which is the output member connected to the wire 10, and the pulley 11. It has a drive section (motor 40 and gear unit 2), a case 20 that houses the pulley 11, the motor 40, and the gear unit 2. The case 20 includes a first case 21 and a second case 22 that face each other in the first direction Z. The first case 21 includes a first side wall portion 211, an opening portion 23 formed by cutting out the first side wall portion 211, and a water blocking portion 24 protruding from an outer peripheral surface of the first side wall portion 211 along an edge of the opening portion 23. A second case cover part 212 extending from the first side wall part 211 to the second case 22 side, and a first case extending inside the second case cover part 212 along an end of the first side wall part 211. And a step portion 213. The second case 22 includes a second side wall portion 221 connected to the first side wall portion 211, and the second side wall portion 221 is provided with a second step portion 223 that fits with the first step portion 213. Further, when the direction from the first case 21 to the second case 22 is one side of the first direction Z (+Z direction), the tip of the second case cover portion 212 is located at a position closer to the first step portion 213 than the first step portion 213. It is located on one side of the direction Z (+Z direction).

In this embodiment, since the water blocking portion 24 is provided at the edge of the opening 23 for pulling out the wire 10 to the outside of the case 20 in this manner, water or foreign matter is unlikely to enter through the opening 23. Therefore, even when the pulley to which the wire 10 is connected is housed in the same case as the motor 40 and the gear unit 2, it is possible to prevent water or foreign matter from entering the case 20. Here, the foreign matter includes insects such as ants in addition to dust. Therefore, as compared with the case where the pulley 11 is arranged outside the case 20, the height of the drain valve driving device 1 in the first direction Z can be made smaller, which is advantageous for downsizing.

In addition, in the present embodiment, the connecting portion between the first case 21 and the second case 22 is a fitting portion in which the first step portion 213 and the second step portion 223 are fitted, and The tip of the second case covering part 212 that covers the joining part from the first case 21 side extends to the second case 22 side (+Z direction) with respect to the first step part 213 that constitutes the fitting part. Therefore, even if water is splashed from the first case 21 side, the water does not reach the fitting portion, and even if water is splashed from the second case 22 side, the water does not easily reach the fitting portion. Therefore, it is difficult for water or foreign matter to enter from the connection between the first case 21 and the second case 22. As described above, since it is possible to effectively suppress the entry of water or foreign matter into the case 20, it is possible to suppress malfunctions due to the entry of water or foreign matter.

In the present embodiment, since the sealant is applied to the gap between the first step portion 213 and the second step portion 223, the connection point between the first case 21 and the second case 22 (the first step portion 213 and It is possible to more effectively suppress the intrusion of water or foreign matter from the fitting portion with the two-step portion 223). It is also possible to adopt a configuration in which the sealant is not applied to the gap between the first step 213 and the second step 223.

In the present embodiment, the water blocking portion 24 is provided on the entire edge of the opening 23. Therefore, it is possible to effectively suppress the entry of water into the opening 23. Further, a configuration in which the water blocking portion 24 is provided on a part of the edge of the opening 23 may be adopted. In this case, the drain valve driving device is provided in an environment where water is splashed from the first case 21 side by providing at least the water blocking portion 24 at the edge of the opening 23 on the other side (-Z direction) in the first direction Z. When 1 is installed, it is possible to effectively suppress the invasion of water into the opening 23 by the water blocking portion 24.

In the present embodiment, the second step portion 223 of the second case 22 includes an inner recess 224 in which the inner peripheral side of the end surface of the second side wall portion 221 on the other side in the first direction Z (−Z direction) is recessed. The first step portion 213 of the first case 21 includes an inner convex portion 214 that fits into the inner concave portion 224. When a fitting portion having a so-called spigot structure is provided in a portion covered by the second case covering portion 212 from the first case 21 side, the unevenness of the fitting surface is arranged in such a manner that the unevenness is reversed. Compared with the case, the distance between the fitting surface and the tip of the second case cover 212 can be increased. Therefore, when water is splashed from the second case 22 side, it is difficult for water to reach the connection point (fitting point). Therefore, invasion of water or foreign matter can be effectively suppressed.

In the present embodiment, the plate 13 is arranged between the opening 23 and the pulley 11. The plate 13 faces the opening 23, and the wire 10 is passed through the penetrating portion 14 that penetrates the plate 13. Therefore, even if water or foreign matter may enter through the opening 23, the plate 13 suppresses entry of the pulley 11, the motor 40, and the gear unit 2 side. Therefore, malfunction of the motor 40 and the gear unit 2 due to the intrusion of water or foreign matter can be suppressed.

In the present embodiment, the penetrating portion 14 is a penetrating hole penetrating the center of the plate 13, but the penetrating portion 14 may be a notch-shaped groove extending from the outer peripheral edge of the plate 13 to the center of the plate 13. .. When the penetrating portion 14 is a groove, the work of inserting the wire 10 is easy. Therefore, the ease of assembly can be improved.

In the present embodiment, a sealant that seals the gap between the plate 3 and the wire 10 is applied to the penetrating portion 14 of the plate 13. This makes it difficult for water or foreign matter to enter the pulley 11, the motor 40, and the gear unit 2 through the gap between the plate 13 and the wire 10. Therefore, it is possible to suppress malfunctions due to intrusion of water or foreign matter.

In this embodiment, the drain valve driving member is a wire, and the output member is a pulley 11 that winds the wire 10. As described above, by using the flexible wire 10 as the drain valve driving member, the direction in which the wire 10 is pulled out can be changed within a range where the wire 10 is not in contact with the opening 23. Therefore, the degree of freedom in disposing the drain valve drive device 1 is increased. Further, the wire 10 and the drain valve can be connected even if the positional accuracy when fixing the drain valve driving device 1 is low.

A member other than the wire 10 can be used as the drain valve driving member. For example, a lever having a rack formed as a drain valve driving member may be used, and the lever meshing with the output gear 54 may be moved by the rotation of the output gear 54. In this case, the plate 13 and the restriction portion 15 can be omitted. Further, the wire position restricting portion 19 can be omitted.

DESCRIPTION OF SYMBOLS 1... Drain valve drive device, 2... Gear unit, 10... Wire, 11... Pulley, 12... Groove, 13... Plate, 14... Penetration part, 15... Restriction part, 16... 1st case side restriction part, 17... 2 case side regulation part, 18... Rectangular recessed part, 19... Wire position regulation part, 20... Case, 21... First case, 22... Second case, 23... Opening part, 24... Drainage part, 40... Motor, 41 ... motor case, 42... support plate, 43... bobbin, 44... stator coil, 45... rotor, 50... transmission wheel train, 51... rotor pinion, 52... planetary gear mechanism, 53... reduction gear, 54... output gear, 60 ... 1st clutch mechanism, 70... Rotation regulation mechanism, 80... 2nd clutch mechanism, 151... 1st regulation part, 152... 2nd regulation part, 160... 1st groove part, 161... 1st wall part, 162... 2nd Wall portion, 163... Third wall portion, 170... Second groove portion, 171... First wall portion, 172... Second wall portion, 173... Third wall portion, 181... First rectangular concave portion, 182... Second rectangular concave portion , 210... Upper plate part, 211... First side wall part, 212... Second case cover part, 213... First step part, 214... Inner convex part, 215... Outer concave part, 216, 217... Flat part, 220... Bottom plate 221... Second side wall part, 222... Circular concave part, 223... Second step part, 224... Inner concave part, 225... Outer convex part, 241... Inclined surface, D... Wire diameter, S... Wire position restricting part and pulley In the third direction from the outer peripheral surface of the, X... third direction, Y... second direction, Z... first direction

Claims (6)

A drain valve driving member to which the drain valve is connected,
An output member to which the drain valve driving member is connected,
A drive unit for driving the output member,
A case accommodating the output member and the drive unit,
The case includes a first case and a second case facing each other in the first direction,
The first case has a first side wall, an opening in which the first side wall is cut out, a drainage part protruding from an outer peripheral surface of the first side wall along an edge of the opening, and A second case cover portion extending from the first side wall portion toward the second case side; and a first step portion extending inside the second case cover portion along an end portion of the first side wall portion. Prepare,
The second case includes a second side wall portion that is connected to the first side wall portion, and the second side wall portion is provided with a second step portion that fits with the first step portion.
When the direction from the first case to the second case is one side in the first direction, the tip of the second case cover part is located on one side in the first direction with respect to the first step part. A drain valve driving device characterized by being located. The drain valve drive device according to claim 1, wherein a sealant is applied to a gap between the first step portion and the second step portion. The second step portion includes an inner concave portion in which the inner peripheral side of the other end surface of the second side wall portion in the first direction is concave.
The drain valve drive device according to claim 1 or 2, wherein the first step portion includes an inner convex portion that fits into the inner concave portion. A plate disposed between the opening and the output member,
The plate faces the opening,
The drain valve drive device according to any one of claims 1 to 3, wherein the drain valve drive member is passed through a penetrating portion that penetrates the plate. The drain valve driving device according to claim 4, wherein a sealant that seals a gap between the plate and the drain valve driving member is applied to the penetrating portion. The drain valve driving member is a wire,
The drainage valve drive device according to claim 1, wherein the output member is a pulley around which the wire is wound.

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