JP6037710B2 - Drum washing machine - Google Patents
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- JP6037710B2 JP6037710B2 JP2012175574A JP2012175574A JP6037710B2 JP 6037710 B2 JP6037710 B2 JP 6037710B2 JP 2012175574 A JP2012175574 A JP 2012175574A JP 2012175574 A JP2012175574 A JP 2012175574A JP 6037710 B2 JP6037710 B2 JP 6037710B2
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Description
本発明は,ドラムを内包する外槽を少なくとも懸架手段を備えた防振装置により外枠に支持した構成のドラム式洗濯機に関する。 The present invention relates to a drum type washing machine having a configuration in which an outer tub containing a drum is supported on an outer frame by a vibration isolator having at least a suspension means.
図1に従来のドラム式洗濯機の構造の一例を示す。図1(a)は従来のドラム式洗濯機を右側面から見た断面模式図であり、図1(b)は鉛直方向の上から見た時の断面模式図である。 FIG. 1 shows an example of the structure of a conventional drum type washing machine. FIG. 1A is a schematic cross-sectional view of a conventional drum-type washing machine viewed from the right side, and FIG. 1B is a schematic cross-sectional view when viewed from above in the vertical direction.
従来のドラム式洗濯機は、外枠201の前面に開口する衣類投入口を有し、ドア202によって開口部の開閉を行う。水を貯める外槽203の前方には開口部があり、外枠201前方の開口部とゴム製のパッキンであるベローズ203aで接続されており、外槽203内を水封している。外槽203は下部を一対のサスペンション204で支持されており、サスペンション204はバネ204aとダンパ204bで構成される。また、外槽203上部は前後方向に一対の懸架手段205で支持されており、前後方向に倒れるのを防止している。このように、外槽203は下部、前方、上部をそれぞれ外枠201に弾性支持されている。図中に破線で示すドラム206は外槽203内に回転自由に接続され、外槽203の背面に設置されているモータ207にシャフトを介して接続されている。図中の一点鎖線はドラム206の回転軸を示す。また,図中に懸架手段205により懸架される外槽203やドラム206、モータ207などによって構成される被懸架部である振動部の重心Gを示す。 A conventional drum-type washing machine has a clothing insertion opening that opens in front of the outer frame 201, and the door 202 opens and closes the opening. There is an opening in front of the outer tub 203 for storing water, and the opening in front of the outer frame 201 is connected to a bellows 203a, which is a rubber packing, to seal the inside of the outer tub 203 with water. The lower part of the outer tub 203 is supported by a pair of suspensions 204, and the suspension 204 includes a spring 204a and a damper 204b. The upper part of the outer tub 203 is supported by a pair of suspension means 205 in the front-rear direction, and prevents the body from falling in the front-rear direction. Thus, the outer tank 203 is elastically supported by the outer frame 201 at the lower part, the front part, and the upper part. A drum 206 indicated by a broken line in the drawing is rotatably connected in the outer tub 203 and is connected to a motor 207 installed on the back surface of the outer tub 203 via a shaft. A one-dot chain line in the figure indicates a rotation axis of the drum 206. In addition, the center of gravity G of the vibrating part, which is a suspended part constituted by the outer tank 203, the drum 206, the motor 207 and the like suspended by the suspension means 205 is shown in the figure.
ドラム206内に衣類や水が投入されると、サスペンション204が縮み、外槽203が沈み込む。この時、衣類と水の重心は外槽203やドラム206で構成される振動部の重心Gと異なる位置にあるため、外槽203が前後方向に倒れる可能性がある。そこで、特許文献1に記載の構造を前述した一例であるドラム式洗濯機に当てはめると、外槽203の第一の懸架手段205aで前方を前方上部に懸架し、外槽203の後方を第二の懸架手段205bで後方上部に懸架する懸架手段205を有する構造である。これによりドラム内に衣類と水が投入された場合でも、外槽が前後方向に倒れるのを抑制する事が可能である。 When clothes or water is put into the drum 206, the suspension 204 contracts and the outer tub 203 sinks. At this time, since the center of gravity of the clothes and water is at a position different from the center of gravity G of the vibrating part constituted by the outer tub 203 and the drum 206, the outer tub 203 may fall in the front-rear direction. Therefore, when the structure described in Patent Document 1 is applied to the drum-type washing machine as an example described above, the first suspension means 205a of the outer tub 203 suspends the front at the front upper part, and the rear of the outer tub 203 is the second. The suspension means 205 has a suspension means 205 that is suspended at the rear upper part by the suspension means 205b. Thereby, even when clothes and water are put into the drum, it is possible to suppress the outer tub from falling in the front-rear direction.
図2にドラム式洗濯機のように、回転軸に対する不釣り合いによって発生する遠心力が加振力となる場合の、一般的な振動変位と伝達力の関係を示す。図2(a)が回転速度と振動変位の関係を示し、図2(b)が回転速度と伝達力の関係を示す。バネ定数が大きくなると、振動系の剛性が高くなるため、共振回転速度が大きくなる。また、遠心力は回転速度の2乗に比例するため、共振回転速度が高い程、その時の加振力も大きくなる。図2(a)に示すように、回転速度の上昇に伴い徐々に変位が増大していき、共振時に最大となり、その後徐々に低下する。バネ定数が大きいと、回転速度が共振回転速度よりも低い場合は、バネ定数が小さい場合に比べ、振動変位が小さくなる。しかし、共振回転速度付近もしくはそれよりも高い場合は、バネ定数が大きい程振動変位が大きくなる。特に、振動変位の最大値は、バネ定数が大きい程大きい。同様に、図2(b)に示す伝達力においても、バネ定数が大きい程、伝達力の最大値が大きくなる。このように、振動部を支えるバネはバネ定数が小さい程、振動変位や伝達力を低減することができる。 FIG. 2 shows a general relationship between vibration displacement and transmission force when centrifugal force generated due to imbalance with respect to the rotation shaft becomes an excitation force as in a drum type washing machine. 2A shows the relationship between the rotational speed and the vibration displacement, and FIG. 2B shows the relationship between the rotational speed and the transmission force. As the spring constant increases, the rigidity of the vibration system increases, and the resonance rotational speed increases. Further, since the centrifugal force is proportional to the square of the rotation speed, the higher the resonance rotation speed, the greater the excitation force at that time. As shown in FIG. 2A, the displacement gradually increases as the rotational speed increases, reaches a maximum during resonance, and then gradually decreases. When the spring constant is large, when the rotational speed is lower than the resonance rotational speed, the vibration displacement becomes smaller than when the spring constant is small. However, in the vicinity of the resonance rotational speed or higher, the vibration displacement increases as the spring constant increases. In particular, the maximum value of the vibration displacement increases as the spring constant increases. Similarly, in the transmission force shown in FIG. 2B, the maximum value of the transmission force increases as the spring constant increases. Thus, the smaller the spring constant of the spring that supports the vibration unit, the more the vibration displacement and transmission force can be reduced.
また、特許文献2に記載の構造を前述した一例であるドラム式洗濯機に当てはめると、図3の内部構造を見えるようにした右側面模式図のような構造となる。このような構造とすることで、特許文献1のように外槽203の前後方向への倒れを防止する事ができる。さらに、外枠201への接続位置を第一の懸架手段305aと第二の懸架手段305bを近くに配置する事が可能になるため,外枠201側の接続に必要なスペースを小さくすることができる。 Further, when the structure described in Patent Document 2 is applied to the drum-type washing machine as an example described above, the structure shown in the right side schematic view in which the internal structure of FIG. 3 is visible is obtained. By setting it as such a structure, the fall of the outer tank 203 to the front-back direction like patent document 1 can be prevented. Furthermore, since the first suspension means 305a and the second suspension means 305b can be disposed close to the connection position to the outer frame 201, the space required for connection on the outer frame 201 side can be reduced. it can.
ドラム式洗濯機では、脱水を行う回転速度まで上昇する過程で、複数の振動モードの共振が発生する。そこで、図4にドラム式洗濯機の振動の様子の一例を示す。図4(a)は右側面から見た時の断面模式図であり、外槽203がサスペンション204との締結部を通り、紙面に垂直な軸を中心とした回転振動を示す。また、図4(b)は鉛直方向の上から見た時の断面模式図であり、重心Gを通り紙面に略垂直な軸を中心とした回転振動を示す。 In the drum type washing machine, resonance in a plurality of vibration modes occurs in the process of increasing to the rotational speed at which dehydration is performed. FIG. 4 shows an example of the vibration of the drum type washing machine. FIG. 4A is a schematic cross-sectional view when viewed from the right side surface, and shows the rotational vibration about the axis perpendicular to the paper surface as the outer tub 203 passes through the fastening portion with the suspension 204. FIG. 4B is a schematic cross-sectional view when viewed from above in the vertical direction, and shows rotational vibration about an axis that passes through the center of gravity G and is substantially perpendicular to the paper surface.
ここで、特許文献1に記載の懸架手段を組み込んだドラム式洗濯機において、図4(a)に示す振動が発生した場合の外槽203と懸架手段205の位置関係を図5に示す。図中に示す点線は、上方向に外槽203が振動した時の位置を示す。外槽203はサスペンション204との接続位置付近を中心として紙面に垂直な軸周りに振動するため、外槽203の前方は上方向に振動する。この時、外槽203の前方上部の上下変位は外槽の前後方向の中心付近の上下振動より大きくなる。従って、図5に示すように、外槽203と懸架手段205が干渉する。このような干渉が発生すると、振動した時に許容することができる振動変位が小さなり、許容する事が出来る衣類の片寄りの大きさが低下する。許容できる衣類の片寄りの大きさが小さくなると、脱水起動をやり直す確率が高くなり、脱水時間の延長などを引き起こすため望ましくない。 Here, FIG. 5 shows the positional relationship between the outer tub 203 and the suspension means 205 when the vibration shown in FIG. 4A occurs in the drum-type washing machine incorporating the suspension means described in Patent Document 1. The dotted line shown in the figure indicates the position when the outer tub 203 vibrates upward. Since the outer tub 203 vibrates around an axis perpendicular to the paper surface around the vicinity of the connection position with the suspension 204, the front of the outer tub 203 vibrates upward. At this time, the vertical displacement of the front upper portion of the outer tub 203 becomes larger than the vertical vibration near the center in the front-rear direction of the outer tub. Therefore, as shown in FIG. 5, the outer tub 203 and the suspension means 205 interfere with each other. When such interference occurs, the vibration displacement that can be tolerated when it vibrates is small, or the size of clothing that can be tolerated is reduced. If the allowable size of the clothing is reduced, the probability of restarting the dehydration is increased, which causes an increase in the dehydration time.
一方、特許文献2に示されている支持方法を図6に示す。図6は鉛直方向の上から見た時の模式図であり、図6(a)は静止時を示し、図6(b)は振動時を示している。図6(b)の点線は振動発生時の外槽203の位置を示す。特許文献2では、第一の懸架手段305aによって外槽203の前方を後方上部に懸架し、第二の懸架手段305bによって外槽203の後方を前方上部に懸架している。特許文献2のように側面から見て第一の懸架手段と第二の懸架手段がハの字(逆Vの字)となるように支持する場合、第一の懸架手段もしくは第二の懸架手段の外槽に接続する端の少なくとも一方が、振動の回転中心から遠くなる。回転方向のバネ定数は回転中心からの距離に比例するため、回転中心から遠い位置を支持すると、共振時の振動変位が増加する。さらに、回転中心から遠い位置は変位も大きいため、その位置を支持することで伝達力が大きくなる。 On the other hand, the supporting method shown in Patent Document 2 is shown in FIG. FIGS. 6A and 6B are schematic views when viewed from above in the vertical direction. FIG. 6A shows a stationary state and FIG. 6B shows a vibrating state. The dotted line in FIG. 6B shows the position of the outer tub 203 when vibration is generated. In Patent Document 2, the first suspension means 305a suspends the front of the outer tub 203 on the rear upper part, and the second suspending means 305b suspends the rear of the outer tub 203 on the front upper part. When the first suspension means and the second suspension means are supported in a letter C (reverse V-shape) when viewed from the side as in Patent Document 2, the first suspension means or the second suspension means At least one of the ends connected to the outer tub is far from the rotation center of vibration. Since the spring constant in the rotational direction is proportional to the distance from the center of rotation, supporting a position far from the center of rotation increases the vibration displacement at resonance. Further, since the position far from the center of rotation has a large displacement, supporting the position increases the transmission force.
このように、特許文献1のように外枠201の前パネルおよび後パネルに懸架手段の一端を接続すると、許容できる衣類の片寄り量が低下する一方、特許文献2のように外槽203の前後方向の端を支持すると、共振時の振動変位の増加や外枠への伝達力の増加が生じる。 In this way, when one end of the suspension means is connected to the front panel and the rear panel of the outer frame 201 as in Patent Document 1, the allowable amount of shift of the clothing is reduced, while in the outer tank 203 as in Patent Document 2, Supporting the front-rear end causes an increase in vibration displacement during resonance and an increase in transmission force to the outer frame.
本発明の目的は、運転時の振動を抑制しつつ、脱水時間の長期化を防いだドラム式洗濯機を提供することにある。 An object of the present invention is to provide a drum type washing machine that suppresses vibration during operation and prevents a prolonged dehydration time.
上記の課題を解決するために、本発明は、前方に開口部を有する外枠と、該外枠内に配置される外槽と、該外槽内に回転可能に配置されるドラムと、該ドラムを回転駆動する駆動機構と、前記外槽を前記外枠に弾性支持し,前記外槽の振動を抑制する減衰機構と、前記外槽の上部を前後方向に支持する少なくとも二組の懸架手段を有するドラム式洗濯機において、第一の懸架手段は前記外槽を前方かつ上方へ向けて懸架し、前記第一の懸架手段のうち前記外枠との接続部は前記ドラムの前端の面よりも後方に位置し、第二の懸架手段は前記外槽を後方かつ上方へ向けて懸架し、前記第二の懸架手段のうち前記外枠との接続部は前記ドラムの後端の面よりも前方に位置し、前記第一の懸架手段及び前記第二の懸架手段の前記外槽との接続部は前記ドラムの前後方向の同じ位置にある。
In order to solve the above problems, the present invention includes an outer frame having an opening in the front, an outer tank disposed in the outer frame, a drum rotatably disposed in the outer tank, A driving mechanism for rotationally driving the drum; a damping mechanism for elastically supporting the outer tub on the outer frame to suppress vibration of the outer tub; and at least two sets of suspension means for supporting the upper portion of the outer tub in the front-rear direction. The first suspension means suspends the outer tub forward and upward, and the connecting portion of the first suspension means to the outer frame is from the front end surface of the drum. The second suspension means suspends the outer tub rearward and upward, and the connecting portion of the second suspension means with the outer frame is more than the rear end surface of the drum. located in front, the connecting portion between the outer tub before Symbol first suspension means and the second suspension means before It is in the same position of the front and rear direction of the drum.
本発明によれば、懸架手段は外槽における振動変位の小さい部分を支持する事になり、前後方向の倒れを防止するとともに、外枠への伝達力が低減される。さらに、外槽が振動した際に、外槽と懸架手段とが干渉することがなくなるため、外槽と他の部材の距離を大きくすることが可能となる。従って、許容する事ができる衣類の片寄りの大きさが大きくなるため、衣類の片寄りが大きいことによって起動のやり直しをする確率が小さくなる。 According to the present invention, the suspension means supports the portion of the outer tub where the vibration displacement is small, and prevents the tilting in the front-rear direction and the transmission force to the outer frame is reduced. Furthermore, when the outer tub vibrates, the outer tub and the suspension means do not interfere with each other, so that the distance between the outer tub and other members can be increased. Accordingly, since the size of the clothing that can be tolerated is increased, the probability that the activation is re-executed due to the large clothing displacement is reduced.
以下、本発明の実施形態について、図面を参照しながら説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
図7は本実施形態に関わるドラム式洗濯乾燥機の外観図である。図8は内部構造を示すための右側面中央断面の模式図であり、図9は内部の構造を示すために外枠の一部を切断して示した右側面の模式図である。 FIG. 7 is an external view of a drum type washing and drying machine according to the present embodiment. FIG. 8 is a schematic diagram of the right-side center cross-section for showing the internal structure, and FIG. 9 is a schematic diagram of the right-side view shown by cutting a part of the outer frame to show the internal structure.
外郭を構成し前方に開口部を有する外枠1は、ベース1aの上に取り付けられており、左右の側板1b、1c、前面カバー1d、背面カバー1e、上面カバー1f、下部前面カバー1gで構成されている。左右の側板1b、1cは、コの字型(Uの字型)の上補強材1h、前補強材1i、後補強材1jで結合されており、ベース1aを含めて箱状の外枠1を形成し、外枠として十分な強度を有している。 An outer frame 1 that forms an outer shell and has an opening at the front is mounted on a base 1a, and includes left and right side plates 1b and 1c, a front cover 1d, a back cover 1e, a top cover 1f, and a lower front cover 1g. Has been. The left and right side plates 1b and 1c are connected by a U-shaped upper reinforcing material 1h, a front reinforcing material 1i, and a rear reinforcing material 1j, and a box-shaped outer frame 1 including a base 1a. And has sufficient strength as an outer frame.
ドア2は前面カバー1dの略中央に設けた衣類を出し入れするための投入口を塞ぐためのもので、前補強材1iに設けたヒンジ(図示せず)で開閉可能に支持されている。ドア開放ボタン2aを押すことでロック機構(図示せず)が外れてドアが開き、ドアを前面カバー1dに押し付けることでロックされて閉じる。前補強材1iは、後述する外槽の開口部と同心に、衣類を出し入れするための略円形の開口部を有している。 The door 2 is for closing a slot for putting in and taking out clothes provided in the approximate center of the front cover 1d, and is supported by a hinge (not shown) provided in the front reinforcing member 1i so as to be opened and closed. When the door release button 2a is pressed, the lock mechanism (not shown) is released and the door is opened, and when the door is pressed against the front cover 1d, the door is locked and closed. The front reinforcing material 1i has a substantially circular opening for putting clothes in and out, which is concentric with the opening of the outer tub described later.
外枠1の上部中央に設けた操作・表示パネル3は、電源スイッチ4、操作スイッチ5、表示器6を備える。操作・表示パネル3は外枠1下部に設けた制御装置7に電気的に接続している。 The operation / display panel 3 provided in the upper center of the outer frame 1 includes a power switch 4, an operation switch 5, and a display 6. The operation / display panel 3 is electrically connected to a control device 7 provided at the lower part of the outer frame 1.
図8に示すドラム8は回転可能に支持されており、その外周壁および底壁に通水および通風のための多数の貫通孔を有し、前側端面に衣類を出し入れするための開口部8aを設けてある。開口部8aの外側にはドラム8と一体の流体バランサ8bを備えている。外周壁の内側には軸方向に延びるリフタ8cが複数個設けてあり、洗濯、乾燥時にドラム8を回転すると、衣類はリフタ8cと遠心力で外周壁に沿って持ち上がり、重力で落下するような動きを繰り返す。ドラム8の回転中心軸は、水平または開口部8a側が高くなるように傾斜している。 The drum 8 shown in FIG. 8 is rotatably supported, has an outer peripheral wall and a bottom wall with a large number of through holes for water flow and ventilation, and has an opening 8a for putting clothes in and out on the front end face. It is provided. A fluid balancer 8b integrated with the drum 8 is provided outside the opening 8a. A plurality of lifters 8c extending in the axial direction are provided inside the outer peripheral wall. When the drum 8 is rotated during washing and drying, the clothes are lifted along the outer peripheral wall by the lifter 8c and centrifugal force and fall by gravity. Repeat the movement. The rotation center axis of the drum 8 is inclined so that the horizontal or opening 8a side becomes higher.
外枠1内に配置される円筒状の外槽10は、ドラム8を同軸上に内包し、前面は開口し、後側端面の外側中央に駆動機構としてモータ11を取り付ける。また、外槽10は開口部を有する槽カバー10aとモータが取り付けられる水槽10bに前後方向に分割する事が出来る。外槽10の前部が槽カバー10aであり、外槽10の後部が水槽10bである。モータ11の回転軸11aは、外槽10を貫通し、ドラム8と結合している。 A cylindrical outer tub 10 disposed in the outer frame 1 encloses the drum 8 coaxially, the front surface is opened, and a motor 11 is attached as a drive mechanism at the center of the rear end surface. Moreover, the outer tank 10 can be divided | segmented into the front-back direction in the tank cover 10a which has an opening part, and the water tank 10b to which a motor is attached. The front part of the outer tank 10 is a tank cover 10a, and the rear part of the outer tank 10 is a water tank 10b. A rotation shaft 11 a of the motor 11 passes through the outer tub 10 and is coupled to the drum 8.
外槽10の開口部と前補強材1iに設けた開口部は、ゴム製のベローズ10cで接続しており、ドア2を閉じることで外槽10を水封する。外槽10の底面最下部には、排水口10dが設けてあり、排水ホース10eが接続されている。排水ホース10eの途中には排水弁が設けてあり、排水弁を閉じて給水することで外槽10に水を溜め、排水弁を開いて外槽10内の水を機外へ排出する。 The opening of the outer tub 10 and the opening provided in the front reinforcing member 1i are connected by a rubber bellows 10c, and the outer tub 10 is water-sealed by closing the door 2. A drain outlet 10d is provided at the bottom bottom of the outer tub 10, and a drain hose 10e is connected thereto. A drainage valve is provided in the middle of the drainage hose 10e. Water is stored in the outer tub 10 by closing the drainage valve and supplying water, and the drainage valve is opened to discharge the water in the outer tub 10 to the outside of the machine.
外槽10は、下側をベース1aに固定された左右一対のサスペンション12で防振支持されている。サスペンション12は、外槽10と外枠1に弾性支持するコイルばね12aと、外枠10の振動を抑制する減衰機構であるダンパ12bを有している。また、外槽10の上側は上部補強部材1hに取り付けた懸架手段13で支持されており、外槽10の前後方向へ倒れを防ぐ。懸架手段13は、外槽10を前方かる上方へ向けて引っ張る第一の懸架手段13aと、外槽10を後方かつ上方へ向けて引っ張る第二の懸架手段13bで構成される。外槽10の下部には振動センサ14が設置してあり、振動センサ14の出力からドラムの回転速度の制御を行う。 The outer tub 10 is supported in an anti-vibration manner by a pair of left and right suspensions 12 whose lower side is fixed to the base 1a. The suspension 12 includes a coil spring 12 a that is elastically supported by the outer tub 10 and the outer frame 1, and a damper 12 b that is a damping mechanism that suppresses vibration of the outer frame 10. The upper side of the outer tub 10 is supported by suspension means 13 attached to the upper reinforcing member 1h to prevent the outer tub 10 from falling in the front-rear direction. The suspension means 13 includes a first suspension means 13a that pulls the outer tub 10 upward and forward, and a second suspension means 13b that pulls the outer tub 10 backward and upward. A vibration sensor 14 is installed in the lower part of the outer tub 10, and the rotational speed of the drum is controlled from the output of the vibration sensor 14.
次に、本実施形態に係わる懸架手段13の設置方法について、図10を用いて説明する。 Next, the installation method of the suspension means 13 concerning this embodiment is demonstrated using FIG.
図10(a)に示すように、前後方向に伸びる第一の懸架手段13aの外枠1側への設置位置を外槽10の前端よりも後側にし、前後方向に伸びる第二の懸架手段13bの外枠1側への設置位置を外槽10の後端よりも前側にする。このようにすることで、図6に示すような振動が発生した場合でも、外槽10と外枠1が衝突するより前に、外槽10と懸架手段13が接触する事がないため、外槽10と外枠1のすき間を最大限に振動スペースとして活用することができる。従って、衣類の片寄りが大きい場合でも脱水を起動できるため、衣類の片寄りが大きいことによる脱水のやり直しが生じる確率を低下させることが可能となる。 As shown in FIG. 10 (a), the first suspension means 13a extending in the front-rear direction is placed on the outer frame 1 side at the rear side of the front end of the outer tub 10, and the second suspension means extends in the front-rear direction. The installation position of 13b on the outer frame 1 side is set to the front side of the rear end of the outer tub 10. In this way, even when vibration as shown in FIG. 6 occurs, the outer tub 10 and the suspension means 13 do not come into contact before the outer tub 10 and the outer frame 1 collide. The gap between the tank 10 and the outer frame 1 can be utilized as a vibration space to the maximum. Accordingly, since the dehydration can be started even when the clothing offset is large, it is possible to reduce the probability of re-dehydration due to the large clothing offset.
一般的に、外槽10の前端は他の部分に比べ、外径が小さい。図8の側断面図に示すように、ドラム8の前端よりも後ろの部分はドラム8を内包するため、内径をドラム8の外径よりも大きくする必要があるが、ドラム8の前端よりも前の部分はドラム8と外槽10が干渉することがないため、外径を小さくできるからである。従って、外槽10の外径が最も大きく、最も前方となるのは、ドラム8の前端付近となる。そこで、第一の懸架手段13aのうち外枠1側との接続位置を、ドラム8の前端を含みドラム8の回転軸に垂直な面(面A1)よりも後方とすることで、より確実に外槽10と懸架手段13の接触を防止する事ができる。また、同様に、第二の懸架手段13bのうち外枠1側との接続位置を、ドラム8の後端を含みドラム8の回転軸に垂直な面(面A2)よりも前方とすることで、第二の懸架手段13bについても接触を防止することができる。 In general, the front end of the outer tub 10 has a smaller outer diameter than other portions. As shown in the side sectional view of FIG. 8, since the portion behind the front end of the drum 8 contains the drum 8, the inner diameter needs to be larger than the outer diameter of the drum 8. This is because the drum 8 and the outer tub 10 do not interfere with each other in the front part, so that the outer diameter can be reduced. Accordingly, the outer diameter of the outer tub 10 is the largest, and the frontmost portion is near the front end of the drum 8. Therefore, the connection position of the first suspension means 13a with the outer frame 1 side is more reliably set behind the surface (surface A1) including the front end of the drum 8 and perpendicular to the rotation axis of the drum 8. Contact between the outer tub 10 and the suspension means 13 can be prevented. Similarly, the connection position of the second suspension means 13b to the outer frame 1 side is set to the front of the surface (surface A2) that includes the rear end of the drum 8 and is perpendicular to the rotation axis of the drum 8. Also, contact with the second suspension means 13b can be prevented.
このように、懸架手段13を面A1、面A2の間となる範囲Aに設置することで、外槽10と懸架手段13が干渉する事がなくなるため、外槽10と他の部材距離を大きくすることができる。これに伴い、より大きい衣類の片寄りが発生した場合でも、起動させることが可能となる。 Thus, since the suspension means 13 is installed in the range A between the plane A1 and the plane A2, the outer tank 10 and the suspension means 13 do not interfere with each other, so the distance between the outer tank 10 and other members is increased. can do. As a result, even if a larger garment shift occurs, it can be activated.
また、第一の懸架手段13aと第二の懸架手段13bを共用化することで、製造時の誤組みの防止や部品の共用化によるコスト低減などの利点がある。第一の懸架手段13aと第二の懸架手段13bに発生する前後方向の力を同程度にするためには、右側面から見た時の水平な線と第一の懸架手段13aがなす角θ1と第二の懸架手段13bがなす角θ2とを略同等とする必要がある。ここで、本実施例のようにドラム8の回転軸が傾斜したドラム式洗濯機の場合、外槽10の前側と後側で,外枠1と外槽10の間の鉛直距離が異なる。従って、2つの懸架手段13の外槽10側の接続位置が離れていると、少なくとも設置角度、もしくは設置長さが変わるため、前後のバランスがとりにくい。 Further, by sharing the first suspension means 13a and the second suspension means 13b, there are advantages such as prevention of misassembly during manufacturing and cost reduction by sharing parts. In order to make the force in the front-rear direction generated in the first suspension means 13a and the second suspension means 13b approximately equal, the angle θ1 formed by the horizontal line when viewed from the right side and the first suspension means 13a. And the angle θ2 formed by the second suspension means 13b must be substantially equal. Here, in the case of a drum-type washing machine in which the rotation axis of the drum 8 is inclined as in the present embodiment, the vertical distance between the outer frame 1 and the outer tub 10 is different between the front side and the rear side of the outer tub 10. Therefore, if the connection positions of the two suspension means 13 on the outer tub 10 side are separated, at least the installation angle or the installation length changes, so that it is difficult to balance the front and rear.
そこで、側面から見た時に第一の懸架手段13aと第二の懸架手段13bを逆ハの字(Vの字)となるように設置し、2つの懸架手段13の外槽10側の接続位置を近づけることで、それぞれの設置長さや水平面と懸架手段13がなす角度を同程度とすることが容易となり、第一の懸架手段13aと第二の懸架手段13bのバネを共用化する事が可能となる。 Therefore, when viewed from the side, the first suspension means 13a and the second suspension means 13b are installed so as to have a reverse letter C (V-shape), and the connection positions of the two suspension means 13 on the outer tank 10 side. It is easy to make the installation length and the angle formed by the horizontal plane and the suspension means 13 the same, and the springs of the first suspension means 13a and the second suspension means 13b can be shared. It becomes.
次に、本実施形態に係わる懸架手段13の外槽10への接続方法について、図11を用いて説明する。図11(a)は本発明のドラム式洗濯機の懸架手段13の接続方法を示す右側断面の模式図であり、図11(b)は内部構造が分かるようにした上面模式図である。図11(b)は外槽10に重心G付近を回転中心とした振動が発生した時の外槽10の位置を点線で示す。なお、本実施形態における重心Gとは、外槽10、ドラム8、モータ11などによって構成される被懸架部である振動部の重心を意味する。図11のように本実施形態の懸架手段13は、2つの懸架手段13a、13bの外槽10との接続部を、振動部の重心Gを含みドラム8の回転軸に垂直な面(面B2)よりも前方、かつ外槽10の分割面(面B1)よりも後方に設置する。ここで、外槽10の分割面とは、前方に開口部を有する槽カバー10a(外槽前部)と、後方に駆動機構が設置され水を貯める水槽10bを前後方向に分割する、ドラムの回転軸に垂直な面である。外槽10の回転運動の振動モードは、振動部の重心Gや外槽10の支持方法によっても異なるが、振動部の重心G付近が回転中心となる。さらに、ドラム8内に衣類や水が投入されると、ドラム8の中心は振動部の重心Gよりも前方にあるため、衣類と水を投入後の振動部の重心G‘は衣類と水を投入前の振動部の重心Gよりも前方になる。従って、振動部の重心Gを含みドラム8の回転軸に垂直な面よりも前方で、懸架手段13a、13bを外槽10に設置することで、外槽10の変位が小さい部分を支持する事になり、外枠1への伝達力を低減する事が可能になる。 Next, the connection method to the outer tank 10 of the suspension means 13 concerning this embodiment is demonstrated using FIG. FIG. 11A is a schematic right side cross-sectional view showing a connection method of the suspension means 13 of the drum type washing machine of the present invention, and FIG. 11B is a schematic top view showing the internal structure. FIG. 11B shows the position of the outer tub 10 by dotted lines when vibration occurs around the center of gravity G in the outer tub 10. Note that the center of gravity G in the present embodiment means the center of gravity of a vibrating portion that is a suspended portion configured by the outer tub 10, the drum 8, the motor 11, and the like. As shown in FIG. 11, the suspension means 13 of the present embodiment has a connection portion between the two suspension means 13a and 13b with the outer tub 10 and a surface (surface B2) that includes the center of gravity G of the vibration portion and is perpendicular to the rotation axis of the drum 8. ) And behind the dividing surface (surface B1) of the outer tub 10. Here, the dividing surface of the outer tub 10 is a drum cover 10a (outer tub front) having an opening in the front and a water tub 10b in which a drive mechanism is installed in the rear and stores water in the front-rear direction. A plane perpendicular to the rotation axis. Although the vibration mode of the rotational motion of the outer tub 10 varies depending on the center of gravity G of the vibration part and the support method of the outer tub 10, the vicinity of the center of gravity G of the vibration part is the center of rotation. Further, when clothes or water is put into the drum 8, the center of the drum 8 is in front of the center of gravity G of the vibrating part. It is in front of the center of gravity G of the vibration part before being thrown in. Therefore, by installing the suspension means 13a and 13b in the outer tub 10 in front of the surface perpendicular to the rotation axis of the drum 8 including the center of gravity G of the vibration part, a portion where the displacement of the outer tub 10 is small is supported. Thus, the transmission force to the outer frame 1 can be reduced.
さらに、懸架手段13は振動部の姿勢を保持する役割も果たしているため、メンテナンス時や組み立て時に懸架手段13を取り外すと、振動部が姿勢を保てなくなる。従って、メンテナンス時や組み立て時に槽カバー10aを外した状態においても、2つの懸架手段13が接続された状態であることが望ましい。従って、懸架手段13は外槽10の分割面よりも後ろ、すなわち水槽10bに接続する事が望ましい。 Furthermore, since the suspension means 13 also plays a role of maintaining the posture of the vibration part, if the suspension means 13 is removed during maintenance or assembly, the vibration part cannot maintain the posture. Therefore, it is desirable that the two suspension means 13 be connected even when the tank cover 10a is removed during maintenance or assembly. Therefore, it is desirable that the suspension means 13 is connected to the rear side of the outer tank 10, that is, the water tank 10b.
このような理由から、外槽10への接続は外槽10の分割面(面B1)より後となる水槽に設置し、さらに振動部の重心Gを含み、ドラム8の回転軸に垂直な面(面B2)よりも前方となる図のBの範囲に設置する事が望ましい。 For this reason, the connection to the outer tub 10 is installed in a water basin after the dividing surface (surface B1) of the outer tub 10, and further includes a center of gravity G of the vibration part and a surface perpendicular to the rotation axis of the drum 8. It is desirable to install in the range of B in the figure which is ahead of (surface B2).
図12に懸架手段13の外槽10への接続部を拡大した右側面断面図を示す。第一の懸架手段13aおよび第二の懸架手段13bの外槽10側の接続位置は前後方向の同じ位置にあることで、より振動変位の小さい部分に設置する事が可能になる。懸架手段13を左右方向にずらして設置することで、ほぼ同じ位置に設置する事が可能になる。しかし、地面に垂直な軸に対して対称ではないため、初期状態でモーメントが発生する。さらに、ドラム8内に衣類や水が入ることで外槽10が沈み込むと、よりモーメントが大きくなるため、外槽10の開口部と外枠1側の開口部が左右方向にずれてしまう。このように、第一の懸架手段13aと第二の懸架手段13bの外槽10側の接続位置は外槽10の左右方向の中心を支持する事が望ましい。前後方向および左右方向ともに同じ位置とすると、懸架手段同士が干渉するため、前後方向に少なくとも、第一の懸架手段13aの外槽10側固定具13cと第二の懸架手段13bの外槽10側固定具13bの距離L1を、第一の懸架手段13aおよび第二の懸架手段13bのフック部の大きさL2よりも大きくする必要がある。 FIG. 12 shows an enlarged right side cross-sectional view of the connection portion of the suspension means 13 to the outer tub 10. Since the connection position on the outer tub 10 side of the first suspension means 13a and the second suspension means 13b is at the same position in the front-rear direction, it can be installed in a portion with a smaller vibration displacement. By suspending the suspension means 13 in the left-right direction, the suspension means 13 can be installed at substantially the same position. However, since it is not symmetrical with respect to an axis perpendicular to the ground, a moment is generated in the initial state. Furthermore, when the outer tub 10 sinks due to the clothing or water entering the drum 8, the moment increases, and the opening of the outer tub 10 and the opening on the outer frame 1 side shift in the left-right direction. Thus, it is desirable that the connection position of the first suspension means 13a and the second suspension means 13b on the outer tank 10 side supports the center of the outer tank 10 in the left-right direction. If the front and rear direction and the left and right direction are the same position, the suspension means interfere with each other. Therefore, at least the outer tank 10 side fixture 13c of the first suspension means 13a and the outer tank 10 side of the second suspension means 13b in the front and rear direction. It is necessary to make the distance L1 of the fixture 13b larger than the size L2 of the hook portions of the first suspension means 13a and the second suspension means 13b.
また、従来技術によると、懸架手段13を3本以上のバネで構成する方法が提案されている。このような構成とすることで、衣類や水の量が変わっても外槽10の姿勢を維持できる。しかし、外槽10と外枠1を接続する弾性体が多くなると、力の伝達経路が多くなり,外枠1の振動が大きくなり,床への伝達力も大きくなる。そこで、懸架手段13を2本のバネで構成することで、外枠1への伝達力を低減し、静かな運転を実現することが可能となる。 Further, according to the prior art, a method in which the suspension means 13 is constituted by three or more springs has been proposed. By setting it as such a structure, even if the quantity of clothing and water changes, the attitude | position of the outer tank 10 can be maintained. However, as the elastic body connecting the outer tub 10 and the outer frame 1 increases, the force transmission path increases, the vibration of the outer frame 1 increases, and the transmission force to the floor also increases. Therefore, by configuring the suspension means 13 with two springs, it is possible to reduce the transmission force to the outer frame 1 and realize a quiet operation.
次に、別の実施形態について、懸架手段の外枠1側の接続部付近を拡大して示す図13を用いて説明する。図13(a)は従来構造の支持方法を示し、図13(b)は本実施形態の支持方法を示す。従来の第一の懸架手段101および第二の懸架手段102はそれぞれ、上部補強部材103に接続される。第一の懸架手段101を上補強部材103に取り付けるための第一のホルダ104、第二の懸架手段102を上補強部材103に取り付けるための第二のホルダ105は、上部補強部材103の前後方向の中心よりも前方になるように設置されている。このような構造の場合、上部補強部材103の前方にのみ下向きの力が発生するため、上部補強部材103が反時計回りにねじれてしまう。 Next, another embodiment will be described with reference to FIG. 13 showing an enlarged view of the vicinity of the connecting portion on the outer frame 1 side of the suspension means. FIG. 13A shows a support method of a conventional structure, and FIG. 13B shows a support method of this embodiment. The conventional first suspension means 101 and second suspension means 102 are each connected to the upper reinforcing member 103. The first holder 104 for attaching the first suspension means 101 to the upper reinforcing member 103 and the second holder 105 for attaching the second suspension means 102 to the upper reinforcing member 103 are the longitudinal direction of the upper reinforcing member 103. It is installed in front of the center. In such a structure, since a downward force is generated only in front of the upper reinforcing member 103, the upper reinforcing member 103 is twisted counterclockwise.
そこで、本実施形態の支持方式は図13(b)に示すように、第一の懸架手段111を上補強部材113の前後方向の中心よりも前側に第一のホルダ114を介して接続し、第二の懸架手段112を上補強部材113の前後方向の中心よりも後側に第二のホルダ115を介して設置する。このように設置することで、第一の懸架手段111および第二の懸架手段112によって上補強部材113に力が作用したとしても、紙面に垂直な軸に対して力が釣り合うため、上補強部材113がねじれにくくなる。 Therefore, as shown in FIG. 13B, the support system of the present embodiment connects the first suspension means 111 to the front side of the upper reinforcing member 113 in the front-rear direction via the first holder 114, The second suspension means 112 is installed via the second holder 115 behind the center of the upper reinforcing member 113 in the front-rear direction. By installing in this way, even if force is applied to the upper reinforcing member 113 by the first suspension means 111 and the second suspension means 112, the force is balanced against the axis perpendicular to the paper surface. 113 becomes difficult to twist.
さらに、第一のホルダ114と第二のホルダ115を上補強部材113の前後方向の中心に対して略対称とすることで,より上補強部材113のねじれを防止することができる。 Furthermore, the upper reinforcement member 113 can be prevented from being twisted more by making the first holder 114 and the second holder 115 substantially symmetric with respect to the center of the upper reinforcement member 113 in the front-rear direction.
1 外枠
1h 上補強部材
2 ドア
7 制御装置
8 ドラム
10 外槽
13 懸架手段
13a 第一の懸架手段
13b 第二の懸架手段
DESCRIPTION OF SYMBOLS 1 Outer frame 1h Upper reinforcement member 2 Door 7 Control apparatus 8 Drum 10 Outer tank 13 Suspension means 13a First suspension means 13b Second suspension means
Claims (4)
第一の懸架手段は前記外槽を前方かつ上方へ向けて懸架し、前記第一の懸架手段のうち前記外枠との接続部は前記ドラムの前端の面よりも後方に位置し、第二の懸架手段は前記外槽を後方かつ上方へ向けて懸架し、前記第二の懸架手段のうち前記外枠との接続部は前記ドラムの後端の面よりも前方に位置し、前記第一の懸架手段及び前記第二の懸架手段の前記外槽との接続部は前記ドラムの前後方向の同じ位置にあることを特徴とするドラム式洗濯機。 An outer frame having an opening in the front, an outer tub disposed in the outer frame, a drum rotatably disposed in the outer tub, a drive mechanism for rotationally driving the drum, and the outer tub In the drum-type washing machine having a damping mechanism that elastically supports the outer frame and suppresses vibration of the outer tub, and at least two sets of suspension means that support the upper portion of the outer tub in the front-rear direction.
The first suspension means suspends the outer tub forward and upward, and the connection portion of the first suspension means with the outer frame is located behind the front end surface of the drum, the suspension means is suspended toward the outer tub backward and upward, connecting portions between the outer frame of said second suspension means is located in front of the plane of the rear end of the drum, front Symbol first The drum-type washing machine, wherein the connection portions of the first suspension means and the second suspension means with the outer tub are at the same position in the front-rear direction of the drum.
前記外槽は前記ドラムの回転軸に略垂直な面で水槽と槽カバーとに前後に分割が可能で、前記槽カバーは前方に開口部を有する外槽前部、前記水槽は後方に駆動機構を設置する外槽後部であり、前記第一の懸架手段および第二の懸架手段の前記外槽との接続部が、前記外槽の分割面よりも後ろである前記水槽に位置することを特徴とするドラム式洗濯機。 In the drum type washing machine according to claim 1,
The outer tub can be divided into a water tank and a tank cover in a front-rear direction on a surface substantially perpendicular to the rotation axis of the drum, the tank cover has a front part having an opening in the front, and the water tank has a drive mechanism in the rear. The connecting portion of the first suspension means and the second suspension means to the outer tank is located in the water tank that is behind the dividing surface of the outer tank. A drum-type washing machine.
前記第二の懸架手段のうち前記外槽との接続部は、前記外枠内部に前記懸架手段により懸架される被懸架部の重心を含み前記ドラムの回転軸に垂直な面よりも前方に位置することを特徴とするドラム式洗濯機。 The drum type washing machine according to claim 1 or 2,
Of the second suspension means, the connecting portion with the outer tub is located in front of the surface perpendicular to the rotation axis of the drum including the center of gravity of the suspended portion suspended by the suspension means inside the outer frame. A drum type washing machine.
前記懸架手段は前記第一の懸架手段と前記第二の懸架手段でのみ構成されることを特徴とするドラム式洗濯機。 In the drum type washing machine according to claim 1,
The drum type washing machine according to claim 1, wherein the suspension means comprises only the first suspension means and the second suspension means.
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