JP2015033512A - Washing machine - Google Patents

Washing machine Download PDF

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JP2015033512A
JP2015033512A JP2013166144A JP2013166144A JP2015033512A JP 2015033512 A JP2015033512 A JP 2015033512A JP 2013166144 A JP2013166144 A JP 2013166144A JP 2013166144 A JP2013166144 A JP 2013166144A JP 2015033512 A JP2015033512 A JP 2015033512A
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water
washing
washing tub
groove
respect
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JP2013166144A
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JP5689933B2 (en
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慎太郎 船見
Shintaro Funemi
慎太郎 船見
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Sharp Corp
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Sharp Corp
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Priority to JP2013166144A priority Critical patent/JP5689933B2/en
Priority to PCT/JP2014/054702 priority patent/WO2015019639A1/en
Priority to CN201480040675.7A priority patent/CN105392936B/en
Publication of JP2015033512A publication Critical patent/JP2015033512A/en
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/02—Rotary receptacles, e.g. drums
    • D06F37/12—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a vertical axis
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F23/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry 
    • D06F23/04—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry  and rotating or oscillating about a vertical axis

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine capable of enhancing dewatering force.SOLUTION: On the inner peripheral surface of a washing tub 30, there are formed a plurality of first groove parts 33a each having an upper part inclined with respect to a lower part toward the rear side of a rotation direction (a reverse rotation direction T1) during dewatering operation. The first groove parts 33a are each formed in a curved shape in which an inclination angle with respect to the horizontal is gradually increased upward. The first groove parts 33a each have the upper part inclined with respect to the lower part toward the rear side of the rotation direction during the dewatering operation, and the inclination angle with respect to the horizontal is gradually increased upward, so that water droplets scattered from laundry are smoothly raised along the first groove parts 33a. As a result, the draining of washing water is promoted during the dewatering operation, and dewatering force can be thereby enhanced.

Description

本発明は洗濯槽を備えた洗濯機に関する。   The present invention relates to a washing machine including a washing tub.

従来の洗濯機は、一例として特許文献１に開示されている。この洗濯機は上面を開口して洗濯物を収納する有底筒状の洗濯槽を有し、洗濯槽の底部には撹拌翼が回転可能に配置されている。   A conventional washing machine is disclosed in Patent Document 1 as an example. This washing machine has a bottomed cylindrical washing tub with an upper surface opened to store laundry, and a stirring blade is rotatably arranged at the bottom of the washing tub.

上記構成の洗濯機は、洗濯槽の高速回転によって脱水を行う。このとき、洗濯物から飛散した水滴は遠心力で洗濯槽の周壁内周面に沿って上昇し、周壁上端部から洗濯槽外部へと排水される。   The washing machine configured as described above performs dehydration by high-speed rotation of the washing tub. At this time, the water droplets scattered from the laundry rise along the inner peripheral surface of the peripheral wall of the washing tub by centrifugal force and are drained from the upper end of the peripheral wall to the outside of the laundry tub.

特開平７−４７１９０号公報JP 7-47190 A

しかしながら、上記従来の洗濯機によると、洗濯槽の高速回転により脱水が行われるが、より短時間で脱水を行うために脱水力の向上が求められる。   However, according to the conventional washing machine, dehydration is performed by high-speed rotation of the washing tub. However, in order to perform dehydration in a shorter time, an improvement in dehydration power is required.

本発明は脱水力の向上を図ることができる洗濯機を提供することを目的とする。   An object of this invention is to provide the washing machine which can aim at the improvement of dehydration power.

上記目的を達成するために本発明は、上面を開口して洗濯物を収納する有底筒状に形成された洗濯槽を備えた洗濯機において、前記洗濯槽が下部に対して上部を脱水動作時の回転方向後方に傾斜する複数の第１溝部を内周面に有し、第１溝部が水平に対する傾斜角を上方に向かって暫時大きくした曲線状に形成されることを特徴としている。   In order to achieve the above object, the present invention provides a washing machine including a washing tub formed in a bottomed cylindrical shape with an upper surface opened to store laundry, wherein the washing tub dehydrates the upper portion relative to the lower portion. It has a plurality of first groove portions that are inclined rearward in the rotation direction at the time on the inner peripheral surface, and the first groove portions are formed in a curved shape in which the inclination angle with respect to the horizontal is increased upward for a while.

この構成によると、脱水動作時に洗濯槽が所定方向に回転し、洗濯物から飛散した水滴が洗濯槽の内周面に設けた第１溝部に沿って上昇する。   According to this configuration, the washing tub rotates in a predetermined direction during the dehydrating operation, and water droplets scattered from the laundry rise along the first groove portion provided on the inner peripheral surface of the laundry tub.

また、本発明の洗濯機は、上記構成において、隣接する第１溝部の間に、第１***部が形成されることを特徴としている。   Moreover, the washing machine of this invention is characterized by a 1st protruding part being formed between the adjacent 1st groove parts in the said structure.

また、本発明の洗濯機は、上記構成において、前記洗濯槽が下部に対して上部を脱水動作時の回転方向前方に傾斜する複数の第２溝部を内周面に有することを特徴としている。   Moreover, the washing machine of the present invention is characterized in that, in the above-described configuration, the washing tub has a plurality of second grooves on the inner peripheral surface that incline the upper part with respect to the lower part forward in the rotation direction during the dehydrating operation.

また、本発明の洗濯機は、上記構成において、第２溝部が水平に対する傾斜角を上方に向かって暫時大きくした曲線状に形成されることを特徴としている。   Moreover, the washing machine of the present invention is characterized in that, in the above configuration, the second groove is formed in a curved shape in which the inclination angle with respect to the horizontal is increased upward for a while.

また、本発明の洗濯機は、上記構成において、隣接する第２溝部の間に、第２***部が形成されることを特徴としている。   Moreover, the washing machine of the present invention is characterized in that, in the above configuration, a second raised portion is formed between adjacent second groove portions.

本発明によると、洗濯槽の内周面に設けた第１溝部が下部に対して上部を脱水動作時の回転方向後方に傾斜し、水平に対する傾斜角が上方に向かって暫時大きいので、洗濯物から飛散した水滴が第１溝部に沿って円滑に上昇する。従って、脱水動作時の洗濯水の排水を促進して脱水力を向上することができる。   According to the present invention, the first groove portion provided on the inner peripheral surface of the washing tub is inclined upward in the rotational direction during the dehydrating operation with respect to the lower portion, and the inclination angle with respect to the horizontal direction is large upward for a while. The water droplets scattered from the water rise smoothly along the first groove. Therefore, drainage of washing water during the dehydration operation can be promoted to improve the dehydration power.

本発明の第１実施形態に係る洗濯機の概略構造を示す正面断面図Front sectional drawing which shows schematic structure of the washing machine which concerns on 1st Embodiment of this invention. 本発明の第１実施形態に係る洗濯槽を示す斜視図The perspective view which shows the washing tub which concerns on 1st Embodiment of this invention. （ａ）本発明の第１実施形態に係る洗濯槽の周壁の展開図、（ｂ）図３（ａ）中の一部を拡大して示す拡大図(A) The expanded view of the surrounding wall of the washing tub which concerns on 1st Embodiment of this invention, (b) The enlarged view which expands and shows a part in Fig.3 (a) 図３（ｂ）中のＡ−Ａ断面図AA sectional view in FIG. 脱水動作において水滴に作用する径方向の力を説明する図The figure explaining the radial direction force which acts on a water drop in dehydration operation 脱水動作において水滴に作用する回転方向の力を説明する図The figure explaining the force of the rotation direction which acts on a water drop in dehydration operation 脱水動作における水滴の軌道と水滴の直径の関係を示す図The figure which shows the relation between the trajectory of the water drop and the diameter of the water drop 本発明の第２実施形態に係る洗濯槽の周壁の一部の展開図The expanded view of a part of surrounding wall of the washing tub which concerns on 2nd Embodiment of this invention. 本発明の第３実施形態に係る洗濯槽の周壁の一部の展開図The expanded view of a part of surrounding wall of the washing tub which concerns on 3rd Embodiment of this invention.

＜第１実施形態＞
以下、本発明の第１実施形態について図面を参照して説明する。図１は、第１実施形態に係る洗濯機１の概略構造を示す正面断面図である。なお、図１の手前側が洗濯機１の正面であり、奥側が背面である。 <First Embodiment>
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front sectional view showing a schematic structure of the washing machine 1 according to the first embodiment. In addition, the near side of FIG. 1 is the front of the washing machine 1, and the back side is a back surface.

洗濯機１は全自動型のものであり、金属又は合成樹脂製の外箱１０を備える。外箱１０は直方体形状に成形され、その上面及び底面は開口部となっている。外箱１０の上面開口部には操作パネル等が設けられた合成樹脂製の上面板１１が固定されている。外箱１０の底面開口部には合成樹脂製のベース１２がネジで固定されている。ベース１２の四隅には外箱１０を床の上に支えるための脚部１３が設けられている。   The washing machine 1 is a fully automatic type and includes an outer box 10 made of metal or synthetic resin. The outer box 10 is formed in a rectangular parallelepiped shape, and the upper surface and the bottom surface are openings. A synthetic resin upper surface plate 11 provided with an operation panel or the like is fixed to the upper surface opening of the outer box 10. A synthetic resin base 12 is fixed to the bottom opening of the outer box 10 with screws. Legs 13 for supporting the outer box 10 on the floor are provided at the four corners of the base 12.

上面板１１には洗濯機１内に洗濯物を投入するための洗濯物投入口１４が開設されている。上蓋１５は洗濯機１の奧側で水平回動軸により上面板１１に枢支されている。上蓋１５を手前側に上下に回動させて洗濯物投入口１４を開閉することができる。これにより、後述する洗濯槽３０に洗濯物を投入したり、洗濯槽３０から洗濯物を取り出すことができる。   The upper surface plate 11 is provided with a laundry loading port 14 for loading laundry into the washing machine 1. The upper lid 15 is pivotally supported on the upper surface plate 11 by a horizontal rotation shaft on the heel side of the washing machine 1. The laundry input port 14 can be opened and closed by rotating the upper lid 15 up and down. Thereby, the laundry can be put into the laundry tub 30 described later, or the laundry can be taken out from the laundry tub 30.

外箱１０の内部には水槽２０と洗濯槽３０が収容されている。洗濯槽３０は水槽２０に収納され、洗剤を溶かした水またはすすぎ用の水（以下これらを総称して「洗濯水」という）を溜める。水槽２０及び洗濯槽３０はともに上面が開口した有底筒状のカップの形状を呈しており、各々軸線を垂直にして水槽２０を外側、洗濯槽３０を内側とする形で同心的に配置される。   A water tub 20 and a washing tub 30 are accommodated in the outer box 10. The washing tub 30 is stored in the water tub 20 and stores water in which detergent is dissolved or rinsing water (hereinafter collectively referred to as “washing water”). Both the water tub 20 and the washing tub 30 have the shape of a bottomed cylindrical cup with an open top surface, and are arranged concentrically with the water tank 20 on the outside and the washing tub 30 on the inside, with the axis line vertical. The

水槽２０は外箱１０に対してサスペンション部材（不図示）によって吊り下げられる。サスペンション部材は水槽２０の外面下部と外箱１０の内面コーナー部とを連結する形で計４箇所に配備され、水槽２０を水平部内で揺動できるように支持している。   The water tank 20 is suspended from the outer box 10 by a suspension member (not shown). Suspension members are provided at a total of four locations in such a manner that the lower part of the outer surface of the water tank 20 and the inner corner part of the outer box 10 are connected to support the water tank 20 so that it can swing within the horizontal part.

洗濯槽３０は底壁３０ａと底壁３０ａの周縁から上方に向かって延びる周壁３０ｂとを有している。周壁３０ｂは内径が上方に向かって暫時大きくなるように形成されている。また、周壁３０ｂ上には上端部のみに環状に配置した複数個の排水孔３１が設けられている。この排水孔３１は脱水時に洗濯物からの絞り出された水（洗濯水等を含め）を水槽２０へと排水するために設けられている。洗濯槽３０の上部開口部の縁には、洗濯物の脱水のため洗濯槽３０を高速回転させたときに振動を抑制する働きをする環状のバランサ３２が装着される。なお、バランサ３２に特許文献１に記載されているような排水孔を設けてもよい。この場合、脱水時にバランサ３２に設けた排水孔から水分が排水されるため、洗濯槽３０の上端部に上記排水孔３１を設けなくてもよい。また、上記排水孔３１に加えてバランサ３２に排水孔を設けてもよい。また、洗濯槽３０の内部底面には槽内で洗濯水の流動を生じさせるための撹拌翼７０が回転可能に配置される。   The washing tub 30 has a bottom wall 30a and a peripheral wall 30b extending upward from the periphery of the bottom wall 30a. The peripheral wall 30b is formed so that the inner diameter increases upward for a while. In addition, a plurality of drain holes 31 arranged annularly only at the upper end portion are provided on the peripheral wall 30b. The drain hole 31 is provided for draining water (including washing water) squeezed from the laundry to the water tank 20 during dehydration. An annular balancer 32 is attached to the edge of the upper opening of the washing tub 30 to suppress vibration when the washing tub 30 is rotated at a high speed for dehydrating the laundry. The balancer 32 may be provided with a drain hole as described in Patent Document 1. In this case, since water is drained from drain holes provided in the balancer 32 during dehydration, the drain holes 31 do not have to be provided at the upper end of the washing tub 30. In addition to the drain hole 31, a drain hole may be provided in the balancer 32. In addition, a stirring blade 70 for causing the washing water to flow in the tub is rotatably disposed on the inner bottom surface of the tub 30.

水槽２０の下面には駆動ユニット４０が取り付けられる。駆動ユニット４０はモータ４１、ベルト伝導機構４２及びクラッチ・ブレーキ機構４３を含んでいる。ベルト伝導機構４２はモータ４１の回転出力をクラッチ・ブレーキ機構４３に伝導する。クラッチ・ブレーキ機構４３は中心部から同軸に配される脱水軸４４と撹拌翼軸４５とが上方に突出している。脱水軸４４と撹拌翼軸４５とは二重軸構造となっており、脱水軸４４が撹拌翼軸４５の外側に配置されている。脱水軸４４は下方から上方に向かって水槽２０底面を貫き、洗濯槽３０を支持している。撹拌翼軸４５は、下方から上方に向かって水槽２０を貫通し更に洗濯槽３０の底壁３０ａを貫き、撹拌翼７０を支持している。   A drive unit 40 is attached to the lower surface of the water tank 20. The drive unit 40 includes a motor 41, a belt transmission mechanism 42, and a clutch / brake mechanism 43. The belt conduction mechanism 42 conducts the rotation output of the motor 41 to the clutch / brake mechanism 43. The clutch / brake mechanism 43 has a dewatering shaft 44 and a stirring blade shaft 45 that are coaxially arranged from the center and protrude upward. The dewatering shaft 44 and the stirring blade shaft 45 have a double shaft structure, and the dewatering shaft 44 is disposed outside the stirring blade shaft 45. The dewatering shaft 44 penetrates the bottom surface of the water tub 20 from the bottom to the top and supports the washing tub 30. The stirring blade shaft 45 penetrates the water tub 20 from the lower side to the upper side, passes through the bottom wall 30a of the washing tub 30, and supports the stirring blade 70.

撹拌翼７０は５５〜３００ｒｐｍの回転を行い、洗濯又はすすぎを行う。脱水時には撹拌翼７０が洗濯槽３０と一緒に０〜１２００ｒｐｍで回転して脱水を行う。脱水軸４４と水槽２０との間及び脱水軸４４と撹拌翼軸４５の間には、各々、水漏れを防ぐためのシール部材が配置されている。   The stirring blade 70 rotates at 55 to 300 rpm and performs washing or rinsing. At the time of dehydration, the stirring blade 70 rotates at 0 to 1200 rpm together with the washing tub 30 to perform dehydration. Seal members for preventing water leakage are arranged between the dehydrating shaft 44 and the water tank 20 and between the dewatering shaft 44 and the stirring blade shaft 45, respectively.

上面板１１内の空間には電磁的に開閉する給水弁（不図示）が配置されている。給水弁の上流側に接続され、且つ上面板１１を貫通して上方に突き出す接続管５１には水道水などの上水を供給する給水ホース（不図示）が接続される。また、給水弁の下流側は洗濯槽３０の内部に臨む位置に配置された容器状の給水口（不図示）に接続されている。   A water supply valve (not shown) that opens and closes electromagnetically is disposed in the space in the top plate 11. A water supply hose (not shown) for supplying tap water such as tap water is connected to the connection pipe 51 connected to the upstream side of the water supply valve and protruding upward through the upper surface plate 11. The downstream side of the water supply valve is connected to a container-like water supply port (not shown) arranged at a position facing the inside of the washing tub 30.

また、上面板１１内には制御部（不図示）が設けられている。制御部は上面板１１の上面に設けられた操作表示部（不図示）を通じて使用者からの操作指令を受け、駆動ユニット４０、給水弁及び排水弁６８に動作指令を発する。また、制御部は操作表示部に運転コース、各工程の所用時間等の運転内容の表示指令を発する。   A control unit (not shown) is provided in the upper surface plate 11. The control unit receives an operation command from the user through an operation display unit (not shown) provided on the upper surface of the upper surface plate 11, and issues an operation command to the drive unit 40, the water supply valve and the drain valve 68. In addition, the control unit issues a display instruction for the operation content such as the operation course and the time required for each process to the operation display unit.

水槽２０の底部には水槽２０及び洗濯槽３０の中の水を外箱１０の外に排水する排水ホース６０が取り付けられている。排水ホース６０には水槽２０底部に開口する排水管６１から水が流れ込むようになっている。脱水時に洗濯槽３０の外側へ排出された水は配水管（不図示）を通じて排水ホース６０に流される。   A drain hose 60 for draining water in the water tank 20 and the washing tank 30 out of the outer box 10 is attached to the bottom of the water tank 20. Water flows into the drain hose 60 from a drain pipe 61 that opens to the bottom of the water tank 20. The water discharged to the outside of the washing tub 30 at the time of dehydration flows into the drainage hose 60 through a water pipe (not shown).

洗濯槽３０と水槽２０の間にはパッキン（図示せず）が挟み込まれ、中心部からの水漏れを防止している。水槽２０の底面中心部にはシールホルダ６３が取り付けられ、水槽２０との間で排水管６１までを含めて排水経路が形成されている。洗濯槽３０の底部には排水口６７が円周上に４箇所設けられ、排水口６７は洗濯槽３０内部の水を排水管６１から電磁的に開閉する排水弁６８に導く。シールホルダ６３には内側においてオイルシール（不図示）が圧入されており、オイルシールが洗濯槽３０をシールすることによって、洗濯槽３０は回転可能で且つ水密構造となり、水槽２０と洗濯槽３０との間に独立した排水ダクト６６が形成されている。   A packing (not shown) is sandwiched between the washing tub 30 and the water tub 20 to prevent water leakage from the center. A seal holder 63 is attached to the center of the bottom surface of the water tank 20, and a drainage path is formed between the water tank 20 and the drain pipe 61. There are four drain outlets 67 on the circumference of the bottom of the washing tub 30. The drain outlet 67 guides water in the washing tub 30 from a drain pipe 61 to a drain valve 68 that electromagnetically opens and closes. An oil seal (not shown) is press-fitted inside the seal holder 63, and the oil seal seals the washing tub 30, so that the washing tub 30 is rotatable and has a watertight structure. An independent drainage duct 66 is formed between the two.

上記した構造によって、撹拌翼７０が回転する洗濯時には洗濯槽３０内の水は排水弁６８で止水され、洗濯槽３０内にのみ水が貯められる。このとき、洗濯槽３０と水槽２０の間には水が貯まらない。これにより、洗濯時の節水性を実現している。脱水を行うときは排水弁６８が開かれ、洗濯槽３０内の水は外部に排水される。このとき、脱水軸４４，撹拌翼軸４５と洗濯槽３０がモータ４１の駆動により回転するが、上記したオイルシールにより洗濯槽３０とシールホルダ６３は相対回転可能で且つ水密構造を取り続けることができる。   With the structure described above, the water in the washing tub 30 is stopped by the drain valve 68 at the time of washing in which the stirring blade 70 rotates, and water is stored only in the washing tub 30. At this time, no water is stored between the washing tub 30 and the water tub 20. Thereby, water saving at the time of washing is realized. When performing dehydration, the drain valve 68 is opened, and the water in the washing tub 30 is drained to the outside. At this time, the dehydrating shaft 44, the stirring blade shaft 45, and the washing tub 30 are rotated by driving the motor 41. However, the washing tub 30 and the seal holder 63 can be relatively rotated by the oil seal described above and can continue to have a watertight structure. .

次に、洗濯槽３０について詳細に説明する。図２は洗濯槽３０の斜視図であり、図３（ａ）は洗濯槽３０の周壁３０ｂの展開図であり、図３（ｂ）は図３（ａ）中の領域Ｒを拡大して示す拡大図である。洗濯槽３０の周壁３０ｂの内周面には複数の第１溝部３３ａ、第２溝部３３ｂが形成されている。第１溝部３３ａ、第２溝部３３ｂは例えば、プレス加工により成形することができる。   Next, the washing tub 30 will be described in detail. 2 is a perspective view of the washing tub 30, FIG. 3 (a) is a development view of the peripheral wall 30b of the washing tub 30, and FIG. 3 (b) shows an enlarged region R in FIG. 3 (a). It is an enlarged view. A plurality of first groove portions 33 a and second groove portions 33 b are formed on the inner peripheral surface of the peripheral wall 30 b of the washing tub 30. The first groove part 33a and the second groove part 33b can be formed by press working, for example.

第１溝部３３ａは下部に対して上部が傾斜している。つまり、脱水動作時、洗濯槽３０は正回転方向（図２中、Ｔ２方向であって上方から視て反時計回り方向）に回転するので、第１溝部３３ａは下部に対して上部が脱水動作時の回転方向後方（Ｔ１方向）に傾斜している。また、第２溝部３３ｂは下部に対して上部が洗濯槽３０の回転方向前方（Ｔ２方向）に傾斜している。   The upper part of the first groove 33a is inclined with respect to the lower part. That is, during the dewatering operation, the washing tub 30 rotates in the normal rotation direction (T2 direction in FIG. 2 and counterclockwise when viewed from above), so that the upper portion of the first groove portion 33a is dehydrated with respect to the lower portion. It is inclined backward (T1 direction) in the direction of rotation. The upper part of the second groove 33b is inclined forward (T2 direction) in the rotation direction of the washing tub 30 with respect to the lower part.

第１溝部３３ａ、第２溝部３３ｂは水平に対する傾斜角を上方に向かって暫時大きくした曲線状に形成されている。第１溝部３３ａ、第２溝部３３ｂはそれぞれ洗濯槽３０の回転方向に略等間隔で並設されている。第１溝部３３ａを形成することで、隣接する第１溝部３３ａとの間には、***する第１***部３７ａが形成される。また、第２溝部３３ｂの間にも、同様にして第２***部３７ｂが形成される。   The first groove portion 33a and the second groove portion 33b are formed in a curved shape in which the inclination angle with respect to the horizontal is increased upward for a while. The first groove portion 33 a and the second groove portion 33 b are arranged in parallel in the rotation direction of the washing tub 30 at substantially equal intervals. By forming the first groove portion 33a, a first raised portion 37a is formed between the adjacent first groove portions 33a. Similarly, a second raised portion 37b is formed between the second groove portions 33b.

図３（ｂ）に示すように、第１溝部３３ａ及び第２溝部３３ｂが交差する交点をＸ0、第１***部３７ａ及び第２***部３７ｂが交差する交点をＸ1、第１溝部３３ａと第２***部３７ｂが交差する交点をＸ2、また第２溝部３３ｂと第１***部３７ａが交差する交
点をＸ3とすれば、交点Ｘ0が洗濯槽３０の周壁内周面において最も凹んだ形状となる。また、交点Ｘ1が洗濯槽３０の周壁内周面において最も***、つまり突出した凸状の突出部となる。さらに、交点Ｘ2、Ｘ3は、交点Ｘ0より***し、交点Ｘ1より低く、凸部でもなく、凹部でもなく、交点Ｘ0とＸ1の形状の一部を合わせ持つ。例えば、最も凹んだ交点Ｘ0を基準にその比率を「０」とした場合、最も突出する交点Ｘ1は、その比率を「１」、その中間となる交点Ｘ2、Ｘ3は、その比率を「０.５」となるように形成することができる。この比率により、後述するように第１溝部３３ａに沿って水滴を円滑に上昇させながら、洗濯物の布傷みを低減することができる。なお、この比率は単なる一例であり、これに限定されるものではない。 As shown in FIG. 3B, the intersection point where the first groove portion 33a and the second groove portion 33b intersect is X 0 , the intersection point where the first ridge portion 37a and the second ridge portion 37b intersect is X 1 , and the first groove portion 33a. X 2 is the intersection where the second raised portion 37 b intersects and X 3 is the intersection where the second groove 33 b and the first raised portion 37 a intersect, and the intersection X 0 is the most on the inner peripheral surface of the peripheral wall of the washing tub 30. It becomes a concave shape. Further, the intersection point X 1 is the most protuberant, that is, a protruding protruding portion on the inner peripheral surface of the peripheral wall of the washing tub 30. Further, the intersection points X 2 and X 3 are raised from the intersection point X 0 , and are lower than the intersection point X 1 , and are not convex portions or concave portions, and have a part of the shapes of the intersection points X 0 and X 1 . For example, when the ratio is set to “0” with respect to the most concave intersection X 0 , the most projecting intersection X 1 is “1”, and the intermediate intersections X 2 and X 3 are the ratios. Can be formed to be “0.5”. With this ratio, as will be described later, it is possible to reduce the fabric damage of the laundry while smoothly raising the water droplets along the first groove portion 33a. This ratio is merely an example, and the present invention is not limited to this.

図４は図３（ｂ）中のＡ−Ａ断面図であり、第１溝部３３ａの断面形状を模式的に示している。なお、説明の都合上、理解しやすいように第２溝部３３ｂが形成されていない状態で図示している。隣接する第１溝部３３ａの間には先に説明したように第１***部３７ａが形成されている。この第１***部３７ａは両側に隣接する第１溝部３３ａへと下降するように非常に緩やかな傾斜面３６が形成される。このような形状に形成されることで、洗濯槽３０の周壁３０ｂ（図２参照）に飛散した水滴は傾斜面３６から第１溝部３３ａに円滑に導かれる。また、洗い動作において、洗濯物が洗濯槽３０の周面において第１***部３７ａと擦れ、例えば洗濯板による洗い作用と同様の擦り洗いの動作が働く。なお、第１***部３７ａは緩やかに***した形状であることから、洗濯物の布傷みを低減することができる。   FIG. 4 is a cross-sectional view taken along line AA in FIG. 3B and schematically shows the cross-sectional shape of the first groove portion 33a. For convenience of explanation, the second groove portion 33b is not formed for easy understanding. As described above, the first raised portion 37a is formed between the adjacent first groove portions 33a. The first raised portion 37a is formed with a very gentle inclined surface 36 so as to descend to the first groove portion 33a adjacent to both sides. By being formed in such a shape, water droplets scattered on the peripheral wall 30b (see FIG. 2) of the washing tub 30 are smoothly guided from the inclined surface 36 to the first groove portion 33a. Further, in the washing operation, the laundry rubs against the first raised portion 37a on the peripheral surface of the washing tub 30, and for example, the washing operation similar to the washing action by the washing board works. In addition, since the 1st protruding part 37a is the shape which raised gently, the cloth damage of the laundry can be reduced.

第２溝部３３ｂも第１溝部３３ａと同様の断面形状に形成され、隣接する第２溝部３３ｂの間が***して第２***部３７ｂが形成される。この第２***部３７ｂも、隣接するそれぞれの第２溝部３３ｂへと下降するように非常に緩やかな傾斜面が形成される。この傾斜面は、第１溝部３３ａを設けることで形成された傾斜面３６を区分する格好で形成される。すなわち、第１溝部３３ａを設けることで形成された傾斜面３６は、第２溝部３３ｂが設けられることで、隣接する第２溝部３３ｂ間で第２***部３７ｂを境に区分されて略矩形状の傾斜片３６ａが形成される。   The 2nd groove part 33b is also formed in the cross-sectional shape similar to the 1st groove part 33a, and it protrudes between the adjacent 2nd groove parts 33b, and forms the 2nd protruding part 37b. The second raised portion 37b is also formed with a very gentle inclined surface so as to descend to the respective adjacent second groove portions 33b. This inclined surface is formed so as to separate the inclined surface 36 formed by providing the first groove 33a. That is, the inclined surface 36 formed by providing the first groove portion 33a is divided into a substantially rectangular shape between the adjacent second groove portions 33b with the second raised portion 37b as a boundary by providing the second groove portion 33b. The inclined piece 36a is formed.

例えば、第１***部３７ａ、第２***部３７ｂが交差する１つの交点Ｘ1では、４つの傾斜片３６ａの各角部が集まり、この各傾斜片３６ａは各対角部分が交点Ｘ0へと下降傾斜する。したがって、その他の交点Ｘ0、Ｘ2、Ｘ3においても、４つの傾斜片３６ａの各角部が集まり形成され、交点Ｘ0においては、４つの傾斜片３６ａが、交点Ｘ1側へと上昇傾斜する。一方、交点Ｘ2、Ｘ3では、４つの傾斜片３６ａは、対角となる方向への傾斜するのではなく、隣接する角部が交点Ｘ0側へと下降傾斜し、交点Ｘ1側へと上昇傾斜する。 For example, at one intersection point X 1 where the first raised portion 37a and the second raised portion 37b intersect, each corner portion of the four inclined pieces 36a gathers, and each inclined portion 36a has each diagonal portion to the intersection point X 0 . And tilt down. Therefore, at the other intersections X 0 , X 2 , and X 3 , the corners of the four inclined pieces 36a are gathered and formed, and at the intersection X 0 , the four inclined pieces 36a rise to the intersection X 1 side. Tilt. On the other hand, at the intersections X 2 and X 3 , the four inclined pieces 36a are not inclined in the diagonal direction, but the adjacent corners are inclined downward toward the intersection X 0 side and toward the intersection X 1 side. And tilt up.

なお、図４において第１溝部３３ａ、第２溝部３３ｂの深さ、つまり第１***部３７ａの高さｈは略２ｍｍが好ましい。また、隣接する第１溝部３３ａ間（水平方向での長さ）ｗは、例えば略５０ｍｍ程度が好ましい。したがって、傾斜面３６の傾斜角度（洗濯槽３０の周壁内周面を水平とみて上昇する角度）は５°以下が好ましい。これにより、脱水動作において水滴を円滑に導きながら洗い動作において布傷みの低減を図ることができる。なお、第２溝部３３ｂ間は、脱水を目的とするものでない。このため、第２溝部３３ｂ間は第１溝部３３ａ間ｗよりも大きくても、小さくてもよい。また同一でもよい。なお、本実施形態では、間隔ｗは第２溝部３３ｂ間より大きくした例を示している。ここで、先に説明した各交点Ｘ0、Ｘ1、Ｘ2、Ｘ3の比率を基準にすれば、交点Ｘ0に対し、交点Ｘ1の高さｈは２ｍｍ、交点Ｘ2、Ｘ3は１ｍｍとなる。以上の数値は、あくまでも一例であり、本発明は、これに限定されるものではない。 In FIG. 4, the depth of the first groove 33a and the second groove 33b, that is, the height h of the first raised portion 37a is preferably about 2 mm. Further, the distance between adjacent first groove portions 33a (the length in the horizontal direction) w is preferably about 50 mm, for example. Therefore, the inclination angle of the inclined surface 36 (the angle that rises when the inner peripheral surface of the washing tub 30 is viewed horizontally) is preferably 5 ° or less. Thereby, it is possible to reduce fabric damage in the washing operation while smoothly guiding water droplets in the dehydrating operation. The space between the second groove portions 33b is not intended for dehydration. For this reason, the space between the second groove portions 33b may be larger or smaller than the space between the first groove portions 33a. They may be the same. In the present embodiment, an example in which the interval w is larger than that between the second groove portions 33b is shown. Here, based on the ratio of the intersection points X 0 , X 1 , X 2 , X 3 described above, the height h of the intersection point X 1 is 2 mm with respect to the intersection point X 0 , and the intersection points X 2 , X 3 Is 1 mm. The above numerical values are merely examples, and the present invention is not limited thereto.

次に、本発明の構成による脱水に係る作用について説明する。図５は脱水動作において水滴Ｗに作用する径方向の力を説明する図である。洗濯物から飛散した水滴Ｗには径方向（Ｒ方向）に向かって遠心力Ｆ１が働く。このとき、洗濯槽３０の周壁３０ｂは鉛直（Ｚ方向）に対して傾斜している。このため、遠心力Ｆ１が傾斜面に沿って上向きの分力Ｆ２と傾斜面に対して垂直な方向の分力Ｆ３に分解される。これにより、水滴Ｗは傾斜面に沿って上向きの分力Ｆ２によって重力Ｆ０に抗して周壁３０ｂを上昇する。   Next, the effect | action which concerns on the dehydration by the structure of this invention is demonstrated. FIG. 5 is a diagram for explaining the radial force acting on the water droplet W in the dehydrating operation. Centrifugal force F1 acts on the water droplets W scattered from the laundry in the radial direction (R direction). At this time, the peripheral wall 30b of the washing tub 30 is inclined with respect to the vertical (Z direction). For this reason, the centrifugal force F1 is decomposed into an upward component force F2 along the inclined surface and a component force F3 in a direction perpendicular to the inclined surface. As a result, the water droplet W rises on the peripheral wall 30b against the gravity F0 by the upward component force F2 along the inclined surface.

図６は脱水動作において水滴Ｗに作用する回転方向の力を説明する図である。水滴Ｗは洗濯槽３０とともに回転するが、回転方向（Ｔ２方向）と反対方向（Ｔ１方向）に空気抵抗Ｆ４を受ける。したがって、水滴Ｗには空気抵抗Ｆ４と上向きの分力Ｆ２を合成した合力Ｆ５が働く。これにより、水滴Ｗは回転方向後方（Ｔ１方向）に後退しながら周壁３０ｂを上昇する。   FIG. 6 is a diagram illustrating the rotational force acting on the water droplet W in the dehydrating operation. The water droplet W rotates with the washing tub 30, but receives an air resistance F4 in the direction opposite to the rotation direction (T2 direction) (T1 direction). Accordingly, a resultant force F5 obtained by combining the air resistance F4 and the upward component force F2 is applied to the water droplet W. Thereby, the water droplet W rises on the peripheral wall 30b while moving backward in the rotation direction (T1 direction).

図７は脱水動作における水滴Ｗの軌道ｐと水滴Ｗの直径の関係を示す図である。水滴Ｗは周壁３０ｂを周方向に回転しながら上昇する。このとき、水滴Ｗは複数の水滴と凝集しながら上昇する。このため、水滴Ｗは周壁３０ｂを上昇するに従って径が大きくなり、水滴Ｗに作用する遠心力Ｆ１及び空気抵抗Ｆ４も大きくなる。遠心力Ｆ１は水滴Ｗの重量に比例するため、水滴Ｗの半径の３乗に比例して大きくなる。空気抵抗Ｆ４は水滴の表面積に比例するため、水滴Ｗの半径の２乗に比例して大きくなる。このため、水滴Ｗの径が大きくなるに従って空気抵抗Ｆ４よりも遠心力Ｆ１が水滴Ｗに大きく作用する。したがって、水滴Ｗが周壁３０ｂを上昇する軌道ｐは水平に対する傾斜角が上方に向かって暫時大きくした曲線になる。   FIG. 7 is a diagram showing the relationship between the trajectory p of the water droplet W and the diameter of the water droplet W in the dehydrating operation. The water droplet W rises while rotating the peripheral wall 30b in the circumferential direction. At this time, the water droplet W rises while aggregating with a plurality of water droplets. For this reason, the diameter of the water droplet W increases as it moves up the peripheral wall 30b, and the centrifugal force F1 and the air resistance F4 acting on the water droplet W also increase. Since the centrifugal force F1 is proportional to the weight of the water droplet W, it increases in proportion to the cube of the radius of the water droplet W. Since the air resistance F4 is proportional to the surface area of the water droplet, it increases in proportion to the square of the radius of the water droplet W. For this reason, as the diameter of the water droplet W increases, the centrifugal force F1 acts on the water droplet W more than the air resistance F4. Accordingly, the trajectory p in which the water droplet W rises on the peripheral wall 30b is a curve whose inclination angle with respect to the horizontal is increased upward for a while.

第１溝部３３ａを水滴Ｗの軌道ｐに対応した曲線状に形成することにより、水滴Ｗが第１溝３７ａに沿って周壁３０ｂの内周面を円滑に上昇する。これにより、洗濯水の排水を促進して脱水力の向上を図ることができる。   By forming the first groove portion 33a in a curved shape corresponding to the trajectory p of the water droplet W, the water droplet W smoothly rises on the inner peripheral surface of the peripheral wall 30b along the first groove 37a. Thereby, drainage of washing water can be promoted and dehydration power can be improved.

次に、洗濯機１の洗濯・脱水工程における動作について説明する。洗濯・脱水工程は洗い動作、すすぎ動作、脱水動作を有する。洗濯物を洗濯槽３０の中に投入し、制御装置によって、運転開始を指令する。これにより、給水弁（不図示）を制御し所定水位まで給水が行われる。洗い動作に入ると、モータ４１の動力をベルト伝導機構４２、撹拌翼軸４５を通じて撹拌翼７０に伝達し、撹拌翼７０を正回転方向Ｔ２及び逆回転方向Ｔ１に反転動作させる。このとき、撹拌翼７０の動作に応じて、洗濯槽３０内の洗濯物と洗濯水が撹拌され、洗濯物の洗浄が進行する。   Next, the operation of the washing machine 1 in the washing / dehydrating process will be described. The washing / dehydrating process has a washing operation, a rinsing operation, and a dehydrating operation. The laundry is put into the washing tub 30, and the operation start is instructed by the control device. Thereby, a water supply valve (not shown) is controlled and water supply is performed to a predetermined water level. When the washing operation is started, the power of the motor 41 is transmitted to the stirring blade 70 through the belt transmission mechanism 42 and the stirring blade shaft 45, and the stirring blade 70 is reversed in the forward rotation direction T2 and the reverse rotation direction T1. At this time, according to the operation of the stirring blade 70, the laundry and the washing water in the washing tub 30 are stirred, and the washing of the laundry proceeds.

撹拌翼７０を回転させたとき、周方向に水流が発生する。このとき、洗濯物には周方向の水流によるねじりの動作が働く。また、遠心力により外周側に移動した洗濯物は洗濯槽３０の周壁３０ｂに第１溝部３３ａを形成することで、その第１溝部３３ａの間に形成された第１***部３３ａと擦れる。これにより、洗濯物の擦り洗いの動作が働き、洗浄効果が高まる。また第２***部３７ｂが形成されている場合、この第２***部３７ｂにも擦れる。これにより、洗濯物に擦り洗いの動作が働く。また、第１***部３７ａ及び第２***部３７ｂの交点Ｘ1の突出部と洗濯物との擦れも作用し、洗浄効果を高める効果が増す。このように、第１***部３７ａとは、その方向が反対であるため、擦り洗いによる動作も異なり、かつ***部の交点Ｘ1との擦り洗いを作用し、多種多様の洗い動作が行なわれ、洗浄効果がより高められる。 When the stirring blade 70 is rotated, a water flow is generated in the circumferential direction. At this time, the laundry is twisted by a circumferential water flow. Moreover, the laundry moved to the outer peripheral side by centrifugal force forms a first groove portion 33a on the peripheral wall 30b of the washing tub 30, and thus rubs against the first raised portion 33a formed between the first groove portions 33a. Thereby, the washing operation of the laundry works and the cleaning effect is enhanced. Moreover, when the 2nd protruding part 37b is formed, it also rubs against this 2nd protruding part 37b. As a result, the washing operation works on the laundry. Also, friction between the laundry and the projection of the intersection X 1 of the first ridge 37a and the second raised portion 37b also acts, the effect of enhancing the cleaning effect is increased. Thus, the first raised portion 37a, because that direction is opposite, also unlike operation by scrubbing, and act the scrubbing between the intersection X 1 of the ridges, a wide variety of washing operation is performed The cleaning effect is further enhanced.

洗い動作を開始して所定時間が経過すると撹拌翼７０を停止して排水弁６８が開かれる。これにより、洗濯槽３０内の水が排水口６７介して通り、排水管６１を通って排水ホース６０に排水される。   When a predetermined time has elapsed after the start of the washing operation, the stirring blade 70 is stopped and the drain valve 68 is opened. Thereby, the water in the washing tub 30 passes through the drain outlet 67 and drains to the drain hose 60 through the drain pipe 61.

次に脱水動作が開始する。脱水動作では、クラッチ・ブレーキ機構４３により脱水軸４４がモータ４１に連結される。これにより、モータ４１の駆動によって洗濯槽３０が正回転方向Ｔ２に高速回転して脱水動作が行われる。洗濯槽３０の高速回転によって洗濯物から飛散した水滴は第１溝部３３ａに沿って周壁３０ｂの内周面を上昇し、排水孔３１から水槽２０へと導かれる。これにより、洗濯水の排水を円滑に行って脱水力の向上を図ることができる。水槽２０へ導かれた洗濯水は水槽２０の底部に設けられた排水口６７を経由して排水ホース６０から排水される。また、第１溝部３３ａ及び第２溝部３３ｂを設けることで第１***部３７ａ及び第２***部３７ｂが形成されるため、洗濯槽３０の周壁３０ｂに貼り付く洗濯物との間に隙間が生じ、洗濯物で閉塞する状態を軽減できる。このため、水滴が上述したように溝を伝うように上昇し、洗濯水の排水を円滑、かつ早急に行なえ、水切れのよい脱水を効果的に行なえる。その結果、脱水時間が短くなると同時に、特に洗濯物に含まれる水分量を少なくでき、脱水率を向上させることができる。   Next, the dehydrating operation starts. In the dehydrating operation, the dehydrating shaft 44 is connected to the motor 41 by the clutch / brake mechanism 43. Thereby, the washing tub 30 is rotated at a high speed in the normal rotation direction T2 by the drive of the motor 41, and the dehydrating operation is performed. Water droplets scattered from the laundry due to the high-speed rotation of the washing tub 30 rise along the first groove portion 33 a on the inner peripheral surface of the peripheral wall 30 b and are guided from the drain hole 31 to the water tub 20. Thereby, drainage of washing water can be performed smoothly and improvement of dehydration power can be aimed at. The washing water guided to the water tank 20 is drained from the drain hose 60 via a drain port 67 provided at the bottom of the water tank 20. Moreover, since the 1st protruding part 37a and the 2nd protruding part 37b are formed by providing the 1st groove part 33a and the 2nd groove part 33b, a clearance gap arises between the laundry stuck on the surrounding wall 30b of the washing tub 30. Can reduce the state of being blocked with laundry. For this reason, as described above, the water droplet rises along the groove, so that the washing water can be drained smoothly and quickly, and the water can be effectively drained. As a result, the dehydration time is shortened, and at the same time, the amount of water contained in the laundry can be reduced, and the dehydration rate can be improved.

脱水動作を開始して所定時間が経過するとモータ４１が停止され、排水弁６８を閉じて給水弁（不図示）が開かれる。脱水槽３０に所定量の水が溜まると給水弁（不図示）が閉じられる。次に、洗い動作と同様に、すすぎ動作が行われる。   When a predetermined time elapses after starting the dehydrating operation, the motor 41 is stopped, the drain valve 68 is closed, and the water supply valve (not shown) is opened. When a predetermined amount of water accumulates in the dewatering tank 30, a water supply valve (not shown) is closed. Next, a rinsing operation is performed as in the washing operation.

すすぎ動作を開始して所定時間が経過すると上記の脱水動作が再度行われる。そして、脱水動作を所定時間行われると、洗濯・脱水工程が終了する。   When a predetermined time has elapsed after starting the rinsing operation, the above dehydration operation is performed again. When the dehydrating operation is performed for a predetermined time, the washing / dehydrating process is finished.

本実施形態によると、洗濯槽３０の周壁３０ｂ内周面に下部に対して上部を脱水動作時の回転方向後方（逆回転方向Ｔ１）に傾斜する複数の第１溝部３３ａを形成するとともに第１溝部３３ａを水平に対する傾斜角を上方に向かって暫時大きくした曲線状に形成する。これにより、脱水動作時に洗濯槽３０を正回転方向（反時計回り方向）Ｔ２に高速回転することにより、水滴Ｗを第１溝３３ａに沿って周壁３０ｂの内周面を円滑に上昇させることができる。したがって、洗濯水の排水を促進して脱水力の向上を図ることができる。   According to the present embodiment, a plurality of first groove portions 33a are formed on the inner peripheral surface of the peripheral wall 30b of the washing tub 30 so that the upper portion is inclined rearward in the rotation direction (reverse rotation direction T1) during the dehydrating operation. The groove portion 33a is formed in a curved shape in which the inclination angle with respect to the horizontal is increased upward for a while. As a result, by rotating the washing tub 30 at high speed in the forward rotation direction (counterclockwise direction) T2 during the dehydrating operation, the water droplets W can be smoothly raised along the first groove 33a on the inner peripheral surface of the peripheral wall 30b. it can. Therefore, drainage of washing water can be promoted to improve dewatering power.

また、第１溝部３３ａの側壁が径方向に対して傾斜した傾斜面３６から成り、隣接する第１溝部３３ａの間には***する第１***部３７ａが形成される。これにより、周壁３０ｂに飛散した水滴を傾斜面３６から第１溝部３３ａに円滑に導くことができる。また、洗い動作において、洗濯物が洗濯槽３０の周面に擦れるが、第１***部３７ａは緩やかな傾斜面３６により形成されることから、洗濯物の布傷みを低減することができる。   Moreover, the side wall of the 1st groove part 33a consists of the inclined surface 36 inclined with respect to radial direction, and the 1st protruding part 37a which protrudes is formed between the adjacent 1st groove parts 33a. Thereby, the water droplets scattered on the peripheral wall 30b can be smoothly guided from the inclined surface 36 to the first groove portion 33a. Further, in the washing operation, the laundry rubs against the circumferential surface of the washing tub 30, but since the first raised portion 37a is formed by the gently inclined surface 36, it is possible to reduce the fabric damage of the laundry.

また、下部に対して上部を脱水動作時の回転方向前方（回転方向Ｔ２）に傾斜する複数の第２溝部３３ｂを形成するとともに第２溝部３３ｂを水平に対する傾斜角を上方に向かって暫時大きくした曲線状に形成する。これにより、洗濯物が溜まる洗濯槽３０の下部において第１溝部３３ａと第２溝部３３ｂが交差する交点Ｘ0部分が凹むが、それ以外の部分が突出する形状となる。例えば、第１***部３７ａ及び第２***部３７ｂが交差する交点Ｘ1の部分が凸状に突出している。そのため、四方に傾斜片３６ａを形成した交点Ｘ1に、洗濯物が擦れる。これにより、洗い動作において、洗濯物が洗濯槽３０の周面に擦れる際、洗浄効果を向上させることができる。 In addition, a plurality of second groove portions 33b that incline the upper portion with respect to the lower portion forward in the rotation direction (rotation direction T2) during the dehydrating operation are formed, and the inclination angle of the second groove portion 33b with respect to the horizontal is temporarily increased upward. Form a curve. Thus, although the intersection X 0 portion where the first groove 33a and second groove 33b intersect recessed in the bottom of the washing tub 30 to the laundry are accumulated, a shape that the other portion protrudes. For example, the intersection point X 1 in the portion where the first ridge 37a and the second raised portion 37b intersect protrudes in a convex shape. Therefore, the laundry is rubbed against the intersection X 1 where the inclined pieces 36a are formed in the four directions. Thereby, in the washing operation, when the laundry is rubbed against the peripheral surface of the washing tub 30, the washing effect can be improved.

なお、洗濯槽３０として、上面を開口して内径を上方に向かって暫時大きくした有底筒状からなる構成を例示した。しかし、上下方向、同一径とした有底筒形状のものでも、先に説明した第１溝部３３ａを形成することで、水滴Ｗには空気抵抗Ｆ４により第１溝部３３ａに沿って回転方向後方（Ｔ１方向）に後退することで、周壁３０ｂを上昇するため、上端部側より排水される。したがって洗濯槽３０は、必ずしも上面を開口して内径を上方に向かって暫時大きくした有底筒状からなる構成である必要はない。   In addition, the structure which consists of a bottomed cylindrical shape which opened the upper surface and enlarged the internal diameter for a while as the washing tub 30 was illustrated. However, even in the case of the bottomed cylindrical shape having the same diameter in the vertical direction, by forming the first groove portion 33a described above, the water droplet W is rearward in the rotational direction along the first groove portion 33a by the air resistance F4 ( By retreating in the (T1 direction), the peripheral wall 30b is raised, so that water is drained from the upper end side. Therefore, the washing tub 30 does not necessarily need to have a bottomed cylindrical shape whose upper surface is opened and whose inner diameter is increased upward for a while.

＜第２実施形態＞
図８は第２実施形態に係る洗濯槽３０の周壁３０ｂの一部の展開図である。第２実施形態では第１溝部３３ａが水平に対する傾斜角を上方に向かって暫時大きくした曲線状に形成されているが、第２溝部３３ｂは水平に対する傾斜角が一定の直線状に形成されている。脱水動作時、洗濯槽３０は正回転方向Ｔ２のみに回転し、第１溝部３３ａを用いて排水を行う。これにより、第１実施形態と同様の効果を得ることができる。以上、脱水に関しては、少なくとも第１溝部３３ａが形成されていることで、第１実施形態での脱水に作用する同等の効果を奏する。 Second Embodiment
FIG. 8 is a development view of a part of the peripheral wall 30b of the washing tub 30 according to the second embodiment. In the second embodiment, the first groove portion 33a is formed in a curved shape with the inclination angle with respect to the horizontal being increased upward for a while, but the second groove portion 33b is formed in a linear shape with a constant inclination angle with respect to the horizontal. . During the dehydrating operation, the washing tub 30 rotates only in the forward rotation direction T2, and drains using the first groove 33a. Thereby, the effect similar to 1st Embodiment can be acquired. As described above, regarding the dehydration, at least the first groove portion 33a is formed, so that an equivalent effect that acts on the dehydration in the first embodiment is achieved.

＜第３実施形態＞
図９は第３実施形態に係る洗濯槽３０の周壁３０ｂの一部の展開図である。第３実施形態では第２溝部３３ｂが形成されていない。これにより、洗い動作において、洗濯物が洗濯槽３０の周面に擦れる際に、第２溝部３３ｂが形成されている場合に比べて洗濯物の傷みを抑えて洗浄することができる。また、脱水に関しては、少なくとも第１溝部３３ａが形成されていることで、第１実施形態での脱水に作用する同等の効果を奏する。
＜第４実施形態＞ <Third Embodiment>
FIG. 9 is a development view of a part of the peripheral wall 30b of the washing tub 30 according to the third embodiment. In the third embodiment, the second groove 33b is not formed. Thereby, in washing operation, when the laundry rubs against the peripheral surface of the washing tub 30, washing can be performed while suppressing damage to the laundry as compared with the case where the second groove portion 33b is formed. Further, with respect to dehydration, at least the first groove portion 33a is formed, so that an equivalent effect that acts on dehydration in the first embodiment is achieved.
<Fourth embodiment>

以上説明した実施形態は、排水孔３１を設けた「孔なし」タイプの洗濯槽３０を設ける洗濯機を構成したものとして説明した。しかし、洗濯槽３０の周壁３０ｂに多数の水槽２０と連通する通水孔を設ける「孔あり」タイプのものでも同様にして実施できる。上記通水孔は、それぞれの第１溝部３３ａに沿って多数設ければよい。この構成により脱水時に、脱水された水滴が第１溝部３３ａを上昇すると、その都度通水孔から排水され、水切りがさらに向上する。また、最終的に上昇する水滴は排水孔３１、またはバランサ３２に設けられた排水孔を介して排水される。したがって、水切れが良好に行なわれるため、脱水時間の大幅な短縮が期待できる。また洗濯物の洗浄効果についは、第１〜第３実施形態と同様の効果を奏する。   The embodiment described above has been described as configuring a washing machine provided with a “no hole” type washing tub 30 provided with a drain hole 31. However, the “perforated” type in which water passage holes communicating with a large number of water tanks 20 are provided in the peripheral wall 30b of the washing tub 30 can be similarly implemented. A large number of the water passage holes may be provided along the first groove portions 33a. With this configuration, when dewatered water drops rise in the first groove 33a during dehydration, the water is drained from the water passage hole each time, and drainage is further improved. Further, the finally rising water droplet is drained through the drain hole 31 or the drain hole provided in the balancer 32. Therefore, since the water is drained well, it can be expected that the dehydration time is greatly shortened. Moreover, about the washing | cleaning effect of a laundry, there exists an effect similar to 1st-3rd embodiment.

一方、第２溝部３３ｂを、第１溝部３３ａと共に設ける構成においては、上記通水孔を第１と第２溝部３３ａ、３３ｂが交差する交点Ｘ0に設ければ、脱水による水滴が即座に排水されるため、脱水効果が助長されることにもなる。
＜第５実施形態＞ On the other hand, the waste water a second groove 33b, in the configuration provided with the first groove 33a, by providing the intersection X 0 of the water flow hole the first and second grooves 33a, 33b intersect, immediately water droplets by dehydration Therefore, the dehydration effect is promoted.
<Fifth Embodiment>

なお、洗濯槽３０として、上面を開口して内径を上方に向かって暫時大きくした有底筒状からなる構成を例示した。しかし、上下方向、同一径とした有底筒形状のものでも、先に説明した第１溝部３３ａを形成し、その溝に沿って、水槽２０と洗濯槽３０が連通する通水孔を設けることができる。このような構成であっても、脱水時には水滴が第１溝部３３ａへと流れ込み、通水孔から即座に水槽側へと排水される。そのため、水切れが改善され脱水率、脱水時間の短縮を図れる。また、洗濯時には、先に説明した同等の作用効果が期待できる。   In addition, the structure which consists of a bottomed cylindrical shape which opened the upper surface and enlarged the internal diameter for a while as the washing tub 30 was illustrated. However, even in the bottomed cylindrical shape having the same diameter in the vertical direction, the first groove portion 33a described above is formed, and a water passage hole through which the water tub 20 and the washing tub 30 communicate is provided along the groove. Can do. Even with such a configuration, during dehydration, water droplets flow into the first groove 33a and are immediately drained from the water passage hole toward the water tank. As a result, water drainage is improved, and the dehydration rate and dehydration time can be shortened. In addition, the equivalent operational effect described above can be expected during washing.

以上の構成において、上下方向、同一径とした有底筒形状のものでも、先に説明した第１溝部３３ａを形成することで、水滴Ｗには空気抵抗Ｆ４により第１溝部３３ａに沿って回転方向後方（Ｔ１方向）に後退することで、周壁３０ｂを上昇するため、上端部側より排水される。したがって洗濯槽３０は、必ずしも上面を開口して内径を上方に向かって暫時大きくした有底筒状からなる構成である必要はない。   In the above configuration, even in the case of the bottomed cylindrical shape having the same diameter in the vertical direction, the water droplet W rotates along the first groove portion 33a by the air resistance F4 by forming the first groove portion 33a described above. By retreating backward in the direction (T1 direction), the peripheral wall 30b is raised, so that water is drained from the upper end side. Therefore, the washing tub 30 does not necessarily need to have a bottomed cylindrical shape whose upper surface is opened and whose inner diameter is increased upward for a while.

１ 洗濯機
１０ 外箱
１１ 上面板
１１ａ 出入口
１２ ベース
１３ 脚部
１４ 洗濯物投入口
１５ 上蓋
１６ 延設部
１６ａ 鉛直部
１６ｂ 水平部
２０ 水槽
３０ 洗濯槽
３０ａ 底壁
３０ｂ 周壁
３１ 排水孔
３２ バランサ
３３ａ 第１溝部
３３ｂ 第２溝部
３６ 傾斜面
３６ａ 傾斜片
３７ａ 第１***部
３７ｂ 第２***部
４０ 駆動ユニット
４１ モータ
４２ ベルト伝導機構
４３ クラッチ・ブレーキ機構
４４ 脱水軸
４５ 撹拌翼軸
５１ 接続管
６０ 排水ホース
６１ 排水管
６３ シールホルダ
６６ 排水ダクト
６７ 排水口
６８ 排水弁
７０ 撹拌翼 DESCRIPTION OF SYMBOLS 1 Washing machine 10 Outer box 11 Top plate 11a Entrance / exit 12 Base 13 Leg part 14 Laundry input port 15 Top cover 16 Extension part 16a Vertical part 16b Horizontal part 20 Water tank 30 Washing tank 30a Bottom wall 30b Perimeter wall 31 Drain hole 32 Balancer 33a 1st 1 groove portion 33b second groove portion 36 inclined surface 36a inclined piece 37a first raised portion 37b second raised portion 40 drive unit 41 motor 42 belt transmission mechanism 43 clutch / brake mechanism 44 dehydrating shaft 45 stirring blade shaft 51 connecting tube 60 drain hose 61 Drain pipe 63 Seal holder 66 Drain duct 67 Drain port 68 Drain valve 70 Stirring blade

Claims (5)

上面を開口して洗濯物を収納する底筒状に形成された洗濯槽を備えた洗濯機において、前記洗濯槽が下部に対して上部を脱水動作時の回転方向後方に傾斜する複数の第１溝部を内周面に有し、第１溝部が水平に対する傾斜角を上方に向かって暫時大きくした曲線状に形成されることを特徴とする洗濯機。   A washing machine having a washing tub formed in a bottom cylinder shape for opening an upper surface and storing laundry, wherein the washing tub is inclined with respect to the lower part in the rotational direction rearward during dehydrating operation. A washing machine having a groove portion on an inner peripheral surface, wherein the first groove portion is formed in a curved shape in which an inclination angle with respect to the horizontal is increased upward for a while. 隣接する第１溝部の間に、第１***部が形成されることを特徴とする請求項１に記載の洗濯機。   The washing machine according to claim 1, wherein a first raised portion is formed between the adjacent first groove portions. 前記洗濯槽が下部に対して上部を脱水動作時の回転方向前方に傾斜する複数の第２溝部を内周面に有することを特徴とする請求項１または請求項２に記載の洗濯機。   The washing machine according to claim 1 or 2, wherein the washing tub has a plurality of second grooves that are inclined forward in the rotation direction at the time of dewatering operation with respect to the lower part on the inner peripheral surface. 第２溝部が水平に対する傾斜角を上方に向かって暫時大きくした曲線状に形成されることを特徴とする請求項３に記載の洗濯機。   The washing machine according to claim 3, wherein the second groove part is formed in a curved shape in which an inclination angle with respect to the horizontal is increased upward for a while. 隣接する第２溝部の間に、第２***部が形成されることを特徴とする請求項３または請求項４に記載の洗濯機。   The washing machine according to claim 3 or 4, wherein a second raised portion is formed between adjacent second groove portions.
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