JP4710539B2 - Drum washing machine - Google Patents

Description

  The present invention relates to a drum-type washing machine that performs various processes such as washing, rinsing, and dewatering in a rotating drum having a rotating shaft in a horizontal direction or an oblique direction.

  FIG. 11 is a longitudinal sectional view of a conventional drum-type washing machine, and the configuration will be described below with reference to FIG.

  A water receiving tank 102 in which a rotating drum 103 having a large number of water draining small holes 108 formed on the outer periphery thereof is rotatably disposed therein, and a motor 104 for driving the rotating drum 103 is fixed to an outer bottom portion. In addition, it is supported by the spring body 109 so as to be swingable and anti-vibrated from the outer box 101 which is the main body of the washing machine. The water receiving tank 102 is connected to a water supply hose 112 for supplying washing water from a water supply valve 106 at an upper portion, and a drain port 114 connected to a drain valve 113 is formed at a lower bottom portion. The rotary drum 103 has a protrusion 107 for stirring clothes, and an opening 103a through which the clothes are taken in and out corresponds to a lid 105 that can be opened and closed in the outer box 101 (for example, Patent Document 1). reference).

  A second opening 102 a is formed at the position of the water receiving tank 102 corresponding to the opening 103 a of the rotating drum 103 and the lid 105, and between the second opening 102 a and the opening on the front surface of the outer box 101. Is provided with a packing member 115 made of a flexible material such as a substantially cylindrical rubber. The packing member 115 is fixed in a watertight manner to the second opening 102a of the water receiving tank 102, and contacts the outer box 101 in a watertight manner when the lid 105 is closed.

  The control device 116 is arranged on the upper front surface of the outer box 101, and controls the operation of the motor 104, the water supply valve 106, the drain valve 113, etc., and the control means and input means for sequentially controlling a series of processes such as washing, rinsing and dehydration, It consists of display means.

The operation of the above configuration will be described. The lid 105 is opened, the laundry clothes are put into the rotating drum 103, the power switch (not shown) is turned on, and then a start switch (not shown) provided in the control device 116. When the operation is started, the water supply valve 106 operates to supply water, and when a predetermined water level is detected by a water level detection means (not shown), the water supply is stopped and the motor 104 is driven. In the washing process, the rotary drum 103 rotates at a relatively low speed, and the clothes inside are lifted by the protrusions 107 and the like, dropped from an appropriate height, and washed by the impact force. The rotation of the rotary drum 103 depends on the shape of the protrusion 107, but in general, it is rotated forward and backward in order to reduce tangling of clothing.
When the washing process is completed, the washing water in the water receiving tub 102 is drained through the drain valve 113, and the rinsing process is performed. Water injection rinsing for operating the water supply valve 106 and the like is performed. In the dehydration process, the rotating drum 103 is rotated at a high speed after draining, and the moisture of the laundry is centrifugally dehydrated.

  The drum-type washing machine having such a configuration has the advantage that the amount of washing water can be reduced. On the other hand, the washing method based on the falling weight of the laundry has insufficient stirring power and does not contain enough washing water. Since the state washing process is performed, there is a problem that the process takes time to ensure a lack of cleaning power, uneven cleaning, and a certain level of cleaning power.

In order to solve these problems, as a conventional technique, washing water collected in the water receiving tub 102 is sucked up by a circulation pump and returned to the rotating drum, so that the washing water is sufficiently supplied to the laundry to increase the washing power. There is a technique (for example, see Patent Document 2).
JP 09-215894 A JP 09-215893 A

  However, in the conventional configuration, since the amount of water that can be circulated by the circulation pump is affected by the capacity of the circulation pump, a large-scale circulation pump is required to sufficiently supply washing water to the laundry. On the other hand, there was a problem that the main body of the washing machine had to be made compact. As a result, the circulation pump had to be made small, and therefore there was a problem that a sufficient amount of circulating water could not be obtained. Further, since a new configuration called a circulation pump is required, the configuration becomes complicated, and there are problems in productivity and manufacturing cost.

  The present invention solves the above-described conventional problems, and by returning the washing water in the outer tub to the rotating drum without using a circulation pump or the like, it is possible to improve the cleaning power and reduce the unevenness of washing. It is an object of the present invention to provide a drum-type washing machine having a configuration that does not reduce productivity and keeps manufacturing costs low.

In order to achieve the above object, a drum type washing machine of the present invention includes a bottomed cylindrical water receiving tub that is included in a washing machine body and has a first opening for entering and exiting clothing, and the water receiving tub is rotatable. A cylindrical rotating drum with a bottom having a second opening that is included in the first opening and corresponding to the first opening, and a rotating shaft that is inclined in the horizontal direction or the horizontal direction, and a motor that rotationally drives the rotating drum; The water receiving tank includes a water intake port for the washing water that rotates in the water receiving tank as the rotating drum rotates, a circulation water channel that communicates with the water intake port at one end, and the other end of the circulation water channel. A plurality of outlets for discharging washing water into the rotating drum, a drum fixing member for rotating and supporting the rotating drum on the outer surface side of the rotating drum; and a rib formed on the water receiving tank bottom side With a substantially arc box-shaped rib mounting member The drum fixing member is formed with an extending portion for connecting with the rib attaching member, and the rib attaching member is formed with an extending rib portion for connecting with the extending portion, and the extending portion is formed. Is located on the bottom side of the water receiving tub with respect to the extending rib portion, and the extending portion and the extending portion are positioned so that the extending rib portion is positioned on the first opening side with respect to the extending portion. By connecting the ribs in an overlapping manner , a wash water circulation channel that rotates as the rotating drum rotates is constructed, and the wash water taken from the intake port is taken into the intake port provided in the water receiving tank. It is discharged from the discharge port into the rotating drum, and the washing water is sprinkled on the laundry and circulated. In addition, the construction that achieves the pump function of circulating the washing water through the circulation channel is configured as a structure that is easy to assemble using a highly productive member on the back surface of the rotating drum, thereby reducing the manufacturing cost.

  The drum type washing machine of the present invention improves the washing power and the rinsing performance by circulating the washing water in the water receiving tub into the rotating drum without using a circulation pump or the like and sprinkling the laundry in a shower shape. Can be achieved on the outer bottom surface of the rotating drum with a configuration that can easily and reliably suppress the manufacturing cost.

A first aspect of the invention is a bottomed cylindrical water receiving tub that is included in a washing machine body and has a first opening for clothes in and out, and a water receiving tub that is rotatably included in the water receiving tub and corresponds to the first opening. A bottomed cylindrical rotary drum having a second opening that is open and a horizontal axis or a rotary shaft inclined from the horizontal direction, a motor that rotationally drives the rotary drum, and the water receiving tank A water intake port through which washing water that rotates in the water receiving tank enters as it rotates, a circulating water channel that communicates with one end of the water intake channel, and another end of the circulating water channel that discharges the washing water into the rotating drum. A drum fixing member for rotating and supporting the rotating drum on the outer surface side of the bottom of the rotating drum, and a plurality of substantially arc box-shaped rib mounting members having ribs formed on the bottom of the water receiving tank. The drum fixing member has the rib attachment Forming a extended portion for coupling with product, said rib mounting member to form a extended rib portion for coupling with the extended portion, the water than the extending portion is the extending rib portions The extension part and the extension rib part are overlapped and connected so that the extension rib part is located closer to the first opening part than the extension part while being located on the bottom side of the receiving tank It is.

  With this configuration, the washing water in the water receiving tub is rotated with the rotation of the rotating drum, the rotating washing water is taken into the water intake provided in the water receiving tub, and the washing water taken in from the water intake is discharged. By returning to the rotating drum from the outlet to the shower shape, the washing water is applied to the laundry many times, so that it becomes easy to be included in the laundry, and the cleaning power can be improved and washing unevenness can be eliminated.

  Further, according to the above configuration, in the assembly configuration of the rotating drum, the rib mounting member, and the drum fixing member, the drum fixing member is first set at a predetermined position such as a jig, and then the rib protruding to the outer tank bottom side is provided. The substantially arc box-shaped rib mounting member is set on the outer peripheral portion of the rotating drum so as to have a substantially donut shape, and can be connected to the drum fixing member with a screw or the like from the opening side.

  As a result, the rotating drum can be attached to the drum fixing member from above, so that the bottom outer peripheral flange portion of the rotating drum is attached to the drum fixing member without reversing the drum fixing member, and a screw or the like is attached to the drum fixing member. As a result, the assembly can be performed smoothly.

According to a second aspect of the present invention, the extending portion is formed on a side surface of the drum fixing member, and is disposed so that the extending portion and the extending rib portion are opposed to each other. Boss holes for mounting screws are alternately arranged, and through-holes with different diameters are alternately arranged in the extending rib portion, so that the front and back of the substantially arc box-shaped rib mounting member are mistakenly attached to the drum fixing member. upon cornerstone, since the positioning pins extending portion of the through hole and a drum fixing member extending rib portion of a substantially circular arc box-rib attachment member is interference, such as automated assembly since it is possible to prevent assembly errors Productivity can be improved.

  According to a third aspect of the present invention, the rib attachment member has one or a plurality of boss holes on the outer wall, and a small hole is provided on the outer peripheral wall of the rotating drum corresponding to the boss hole. Since the rotating drum and the rib mounting member can be fixed from the same direction as the direction in which the drum fixing member and the rotating drum are attached with the screw, the automation equipment can be simplified and the productivity can be improved.

According to a fourth aspect of the present invention, a convex portion is formed at the center portion of the bottom outer plane of the rib mounting member, the convex portion is brought into contact with the bottom of the rotating drum, and the inner peripheral vertical wall surface of the extending rib portion of the rib mounting member Are provided with triangular ribs, and the triangular ribs are pressed and fixed by a drum fixing member.

As a result, the convex portion at the center of the outer plane of the bottom of the substantially arc-shaped rib mounting member is brought into contact with the bottom surface of the drum to bend the substantially arc-shaped rib member, and is provided on the inner peripheral vertical wall surface in the longitudinal direction. By pressing and fixing the triangular rib to the drum bottom member, the substantially arc box-shaped rib mounting member can be fixed between the rotating drum and the drum fixing member. This eliminates the need for automatic assembly.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a drum type washing machine in an embodiment of the present invention. In FIG. 1, in the main body 1 of the drum type washing machine, a bottomed cylindrical water receiving tub 6 is inclined downward from the front side to the back side of the main body 1 by a suspension structure (not shown). It is supported. The water receiving tank 6 is constituted by a water receiving tank main body 2 and a water receiving tank cover 3, and is connected and fixed in a watertight manner via the first packing member 4 at the connection portion. The water receiving tub 6 rotatably supports a rotating drum 5 formed in a cylindrical shape with a bottom on the inner side so that its rotating shaft is inclined downward from the front side of the main body 1 toward the back side. .

  On the front side of the main body 1, a main body opening 1a for taking in and out the laundry is formed, and a door body 8 that covers the main body opening 1a so as to be freely opened and closed is provided.

  The main body opening receiving tank cover 3 is provided with a water receiving tank cover opening (first opening) 3a at a position corresponding to the main body opening 1a, and the rotating drum 5 includes the main body opening 1a and the water receiving tank. A rotating drum opening 5a (second opening) is provided at a position corresponding to the cover opening 3a. The laundry is put into and out of the rotating drum 5 from the outside of the main body 1 through the main body opening 1a, the water receiving tank cover opening 3a, and the rotating drum opening 5a.

  The rotating drum 5 includes a rotating drum front surface 5b provided with a rotating drum opening 5a, a rotating drum body 5c having a bottomed cylindrical shape and a plurality of drain holes 5g, and a rotating drum bottom portion constituting the bottom. 5d, and a plurality of agitation protrusions 5e are provided on the inner surface of the rotating drum body 5c, which is rotated by a drive motor 7 attached to the outside of the water receiving tank body bottom 2c of the water receiving tank body 2. It is driven and its rotation speed and left-right rotation direction are variable.

  One end of the first water supply hose 10a is connected to the first water supply valve (first water supply means) 9, and the other end of the first water supply hose 10a is connected to the water injection base part 10b, and the water injection base part 10b. Is opened in a slit shape so that water to be poured is poured into the rotating drum 5 while spreading in a substantially horizontal direction, and water is poured so as to spread into the rotating drum 5.

  One end of a second water supply hose 13a is connected to the second water supply valve (second water supply means) 11, and the other end of the second water supply hose 13a is connected to a detergent case 13c that houses the detergent 13b. One end of the third water supply hose 13d is connected to the lower part of the case 13c, and the other end of the third water supply hose 13d is connected to the water receiving tank 6 so that water can be supplied into the water receiving tank 6.

  The upper surface of the detergent case 13c is provided with a plurality of water injection holes 13e for pouring water supplied by the second water supply hose 13a into the detergent case 13c in a shower shape, and the shower-like water coming out of the water injection holes 13e is detergent. It falls onto 13b and flows into the water receiving tank 6 together with the detergent 13b. In addition, a discharge port 34 such as a circulating water channel 28 described later is formed in the vicinity of the water receiving tank cover opening 3 a below the water receiving tank 6, and is arranged to discharge the circulating water into the rotating drum 5 and the water receiving tank 6. The washing water that has flowed down into the water receiving tank 6 is drained out of the water receiving tank 6 by opening a drain valve 43 provided in the middle of the drain pipe 42 during the draining process.

FIG. 2 is a block diagram showing a configuration of the control device for the drum-type washing machine according to Embodiment 1 of the present invention. In FIG. 2, the control device 15 includes a control unit 16, a setting unit 17, a storage unit 18, a power switching unit 19, and the like. The control means 16 constituted by a microcomputer issues a control command to the power switching means 19 using a control program stored in the storage means 18 in response to a setting input such as selection of an operation course input from the setting means 17. Output. The power switching means 19 is configured by using a switching element such as an SCR (thyristor), and controls the operation of the drive motor 7, the water supply valves 9 and 11, the drain valve 43 and the like according to a control command from the control means 16. .

  The motor 7 is composed of, for example, a direct current brushless motor, and is controlled by the control means 16 and the power switching means 19 so that the forward / reverse rotation and the rotation speed can be varied. The control unit 15 controls the cloth amount detecting means 12 for detecting the amount of water, the water level detecting means 14 for detecting the level of the washing water in the water receiving tub 6 and a series of operation steps from the washing step to the dehydration step. .

  FIG. 3 is a perspective view of the water receiving tub body 2 of the drum type washing machine according to Embodiment 1 of the present invention. FIG. 4 is a perspective view of the water receiving tank cover 3. The configuration of the circulating water channel will be described below with reference to FIGS.

  The water receiving tank main body 2 is a bottomed cylindrical type having a water receiving tank main body opening 2a, a water receiving tank main body trunk 2b, and a water receiving tank main body bottom 2c.

  In the vicinity of the boundary between the water receiving tank main body bottom 2c and the water receiving tank main body 2b and on the inner surface of the water receiving tank main body bottom 2c, the water receiving tank main body bottom groove 2d is formed into a water receiving tank. It is provided in an arc shape substantially concentric with the main body barrel 2b. A water receiving tank main body groove lid 23 having a shape corresponding to the water receiving tank main body bottom groove 2d is formed on the water receiving tank main body bottom groove 2d via the second packing member 24 provided in the vicinity of the outer periphery thereof. The outer peripheral part is fixed by screwing with a screw 25, and a first circulating water channel 22 is formed by the water receiving tank main body bottom groove 2d and the water receiving tank main body groove lid 23.

  The water intake 20 which is one end of the first circulation water channel 22 communicates with the guide recess 21 whose bottom surface gradually changes from the bottom surface of the water receiving tank main body bottom groove 2d to the inner surface of the water receiving tank main body bottom 2c. Further, the water receiving tank main body 2 is integrally provided with a pipe-shaped second circulation water channel 26 that communicates from the water receiving tank main body opening 2a to the water receiving tank main body bottom 2c outside the water receiving tank main body 2b. The end of the second circulating water channel 26 on the water receiving tank main body bottom 2c side is in communication with the other end of the first circulating water channel 22.

  The structure of the water receiving tank cover 3 will be described with reference to FIG.

  The water receiving tank cover 3 has a substantially cylindrical shape having a water receiving tank cover front surface part 3b provided with a water receiving tank cover opening 3a, a water receiving tank cover body 3c, and a water receiving tank cover rear opening 3d. Is formed.

  The water receiving tank cover 3 communicates from the water receiving tank cover rear opening 3d to the water receiving tank cover front surface portion 3b at a position corresponding to the second circulation water channel 26 outside the water receiving tank cover body 3c. A third circulating water channel 27 is integrally formed.

  On the inner surface of the water receiving tank cover front face portion 3b, a water receiving tank cover front face groove portion 3e formed in a substantially concave shape is moved from the outer peripheral side of the water receiving tank cover front face portion 3b toward the water receiving tank cover opening 3a. It is provided in a substantially Y shape that is divided into two forks. A water-receiving-tank cover groove cover 29 having a shape corresponding to the shape of the water-receiving-tank cover front-side groove 3e from the inner surface side is provided in the water-receiving-tank cover front-side groove 3e. The outer peripheral portion is screwed and fixed with a screw 31. A substantially Y-shaped fourth circulation water channel 28 is formed by the water receiving tank cover front face groove portion 3e and the water receiving tank cover groove cover 29.

  One end, which is a substantially Y-shaped lower end of the fourth circulating water channel 28, communicates with an end of the third circulating water channel 27 on the water receiving tank cover front surface portion 3 b side. The water receiving tub cover groove lid 29 is provided with a discharge port 34 for discharging washing water in the vicinity of the forked portion.

  With this configuration, as shown in FIG. 1, the discharge port 34 is in the vicinity of the outer periphery of the water receiving tank cover opening 3a and on the inner surface side of the water receiving tank cover front surface 3b, and in the rotating drum opening 5a. It is arrange | positioned so that it may face.

  Further, in a state where the water receiving tank main body 2 and the water receiving tank cover 3 are connected and fixed and supported by the main body 1 as the water receiving tank 6, the discharge port 34 is positioned in the lower half of the water receiving tank cover front surface portion 3b. However, it is provided at a position lower than the water intake 20.

  Further, when the water receiving tank body 2 and the water receiving tank cover 3 are connected and fixed, the second circulating water channel 26 and the third circulating water channel 27 are connected to the water receiving tank body 2 and the water receiving tank cover 3 described above. It is connected and fixed in a watertight manner through the first packing member 4 in the same manner as the connection and fixing method.

  5 is a plan view (as viewed from the right side A in FIG. 1) of the rotating drum bottom 5d of the drum type washing machine according to Embodiment 1 of the present invention, and FIG. FIG. The structure of the rotating drum that performs the pump function for circulating the wash water in the circulation channel will be described below with reference to FIGS.

  The rotating drum bottom 5d is formed in a substantially concave shape by providing a flange portion 5f protruding outward on the outer periphery thereof, and the rear end portion of the rotating drum body 5c and the flange portion 5f are connected by caulking or welding or the like. is doing. Inside the flange portion 5f on the outer surface side of the rotating drum bottom portion 5d, there are provided a drum fixing member 35 made of aluminum die cast having three extending portions 35a substantially radially, and the three extending portions. Three generally arcuate box-shaped rib mounting members 37 are disposed in a substantially donut shape along the outer periphery of the rotating drum bottom 5d.

  The three rib attachment members 37 are formed of a plastic molded product or the like, and are provided with an outer wall 40 and an inner wall 41 that protrude rearward on the outer periphery, so that they are formed in a substantially concave shape, and the outer wall 40 and the inner wall are formed therein. A plurality of ribs 38 for connecting to the outer wall 40 and the inner wall 41 are formed at the same height and radially on the outer peripheral side, and the rib attachment members 37 are provided at both ends in the circumferential direction. The extending ribs 38a for attaching to the extending portions 35a of the 35 are provided. As shown in FIG. 5, the drum fixing member 35 is fixed to the rotating drum 5 with a screw 39 b from the outer peripheral direction and the rib mounting member 37 with a screw 39 a from the planar direction, and further extends from the motor 7. The rotation of the motor 7 is transmitted to the rotating drum 5 by being connected at the central portion 7a.

  About the drum type washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  The control means 16 rotates the rotating drum 5 at a first predetermined rotational speed by driving the motor 7 during the washing process or the rinsing process. This first predetermined rotational speed is caused by the centrifugal force accompanying the rotation of the rotating drum 5. The rotation speed is set so that the laundry sticks to the inner peripheral surface of the rotary drum 5 by centrifugal force (for example, 80 r / pm). As the rotating drum 5 rotates, the washing water is stirred by the action of the pump blades of the ribs 38 provided on the outer bottom 5d of the rotating drum 5, and rotates around the boundary between the water receiving tank body 2b and the water receiving tank main body bottom 2c. Then, it is guided to the guide recess 21 and taken into the water intake 20, passes through the first to fourth circulation water channels 22, 26, 27, and 28, and rotates from the discharge port 34 configured at a position lower than the water intake 20. The drum 5 is ejected vigorously.

  Since the laundry in the rotating drum 5 is stuck to the inner peripheral surface by centrifugal force, the circulated washing water is poured into the laundry every time the rotating drum 5 rotates, and the washing water in the washing water due to the centrifugal force flows inside the laundry. It is possible to perform the operation of the so-called shower washing process that permeates, and to allow the washing water to permeate the laundry at an early stage.

  Further, the rotational speed of the rotating drum is equal to or lower than the first predetermined rotational speed (for example, 80 r / min), and the second predetermined rotational speed (for example, 45 r / min) at which the gravity of the laundry is superior to the sticking force due to the centrifugal force. In the case of being controlled, the washing force of the washing water is low and the amount of the washing water discharged from the discharge port 34 is very small or there is no discharge amount. The agitating washing process is performed while loosening the laundry, in the same manner as the tapping washing.

  Combining the above shower washing process and the agitation washing process is effective in the operation of sprinkling washing water containing detergent on the laundry in the form of a shower and the agitation action of dropping the tangled laundry into the washing water while loosening it. You can get a good washing effect.

  Next, the assembly method of the rotating drum 5, the drum fixing member 35, and the rib mounting member 37 will be described. First, the drum fixing member 35 is set on a predetermined table such as a jig with the motor 7 side down. . Next, the three rib attachment members 37 are set so that the surface on which the ribs 38 are formed face down, and the extending ribs 38a are positioned at predetermined positions of the extending portions 35a, and are fastened and fixed by screws 39a. .

  Thereafter, the rotating drum 5 is set in a predetermined circumferential direction on the drum fixing member 35 with the rotating drum bottom 5d side down, and a screw hole provided in the extending portion 35a so as to sandwich the flange portion 5f from the outside ( The screw 39b is fastened and fixed to the outer peripheral surface (not shown). Accordingly, the bottom outer peripheral flange portion of the rotating drum is mounted on the drum fixing member and fixed with screws or the like from the outer peripheral portion without reversing the drum fixing member, so that assembly can be performed smoothly and automation is possible.

(Embodiment 2)
FIG. 7 is a longitudinal sectional view of a main part of a rotating drum of a drum type washing machine according to the second embodiment of the present invention. The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIG. 7, in the extending portion 35a of the drum fixing member 35, a cylindrical pin 35b and a screw 39c are used to hold and fix the extending rib 38a of the substantially arc box-shaped rib mounting member 37. The fastening screw holes 35c are alternately arranged and provided. Further, a pin insertion small hole 38b and a screw insertion hole 38c are formed in the extending rib 38a of the rib attachment member 37 at a position corresponding to the pin 35b and the screw hole 35c. The diameter of the pin 35b is set larger than that of the screw 39c and the screw insertion hole 38c.

  With the above configuration, when the front and back sides of the substantially arc-shaped rib mounting member 37 are mistakenly attached to the drum fixing member 35, the substantially arc-shaped box-shaped rib mounting member 37 is extended if it is not arranged at the correct position. Since the through hole of the rib 38a and the pin 35b of the extending portion 35a of the drum fixing member 35 interfere with each other, it can be easily determined. On the other hand, the pin 35b and the pin insertion small hole 38b serve as a guide at the time of assembly, thereby preventing an assembly error and improving productivity such as automation.

(Embodiment 3)
FIG. 8A is an external view of a substantially arc box-shaped rib mounting member 37 according to the third embodiment of the present invention, and FIG. FIG. The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The substantially arc box-shaped rib mounting member 37 is made of a molded plastic product or the like. As shown in FIG. 8A, a part of the outer wall 40 of the rib mounting member has a boss portion 50 and a boss on the inside thereof. A hole 42 is provided. In addition, although the said boss hole is one place in Fig.8 (a), you may form multiple. As shown in the cross-sectional view of FIG. 8B, a small hole is formed at the position of the flange portion 5f of the rotary drum 5 and the rotary drum body portion 5c connected by caulking or welding corresponding to the position of the boss hole 42. 51 is formed. The diameter and depth of the boss hole 42 are set to dimensions corresponding to the tapping screw 52 for attachment from the outer peripheral side.

  Here, a method for assembling the rotating drum 5, the drum fixing member 35, and the rib attachment member 37 will be described.

  First, the drum fixing member 35 is set on a predetermined base such as a jig with the motor side facing down, and then the three rib mounting members 37 are faced down with the surface on which the ribs 38 are formed, The extending rib 38a is set so as to be at a predetermined position of the extending portion 35a of the drum fixing member 35. Thereafter, the rotating drum 5 is set in a predetermined circumferential direction on the drum fixing member 35 with the bottom 5d side down from above, and the outer periphery of the rotating drum body 5c is shown in the plan view of FIG. The rotating drum 5 and the drum fixing member 35 are fixed by tightening a screw 39b in a screw hole provided in the extending portion 35a from the side, and the outer wall of the substantially arc box-shaped rib mounting member 37 as shown in FIG. The rib attachment member 37 is fixed to the rotating drum 5 by tightening the tapping screw 52 in the boss hole 42 provided in 40 from the outer peripheral direction.

  As a result, the rib mounting member 37 and drum fixing member 35 screw 39c proposed in FIG. 7 in the direction of the rotation axis can be eliminated, and the screw 39b in FIG. 5 and the tapping screw 52 in FIG. In assembly, the rotary drum 5, the drum fixing member 35, and the rib attachment member 37 can be assembled in one direction (from the outer peripheral direction), and the equipment for automated assembly is simplified and productivity is improved.

(Embodiment 4)
FIG. 9 is a longitudinal sectional view of an essential part of the rotating drum 5 of the drum type washing machine in the fourth embodiment of the present invention. The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The substantially arc box-shaped rib mounting member 37 is made of a molded plastic product or the like, and is provided with one or a plurality of convex portions 43 at the center portion of the bottom surface of the bottom portion. The rib mounting member 37 made of a material or the like is bent using the flexibility, and the triangular rib 44 integrally formed on the vertical wall surface of the inner peripheral wall 41 is pressed and fixed to the drum fixing member 35 so that a gap between the two members is obtained. It is possible to eliminate looseness and the like, and to fix the rib attachment member 37 tightly between the rotating drum 5 and the drum fixing member 35 without using screws. With this configuration, it is possible to eliminate the screw required to connect the substantially arc box-shaped rib mounting member proposed in FIG. 7 and the drum fixing member, and it is possible to reduce the time required for screw tightening and facilitate automation. .

(Embodiment 5)
FIG. 10 is a plan view from the outside of the rotating drum bottom 5d of the rotating drum 5 according to the fifth embodiment of the present invention.

  As shown in FIG. 10, in the present embodiment, the drum fixing member 45 is manufactured by using, for example, an aluminum die-casting member as a substantially arc-shaped rib mounting member 37. An inner peripheral wall 46 is integrally formed on the peripheral portion and an outer peripheral wall 47 is integrally formed on the outer peripheral portion, and a plurality of ribs 48 are formed between the inner peripheral wall 46 and the outer peripheral wall 47. The drum fixing member 45 fixes the rotating drum 5 from the outer peripheral direction with a screw 49.

  With this configuration, the number of parts can be greatly reduced and the time required for assembling the parts can be greatly reduced.

  As described above, since the drum type washing machine according to the present invention can be washed without using a circulation pump, it is possible to improve cleaning power and reduce cleaning unevenness. The present invention can be widely applied not only to a washing machine but also to various devices and apparatuses that perform cleaning while rotating a rotating drum.

The longitudinal cross-sectional view of the drum type washing machine in Embodiment 1 of this invention The block diagram which shows the structure of the control apparatus of the drum type washing machine Perspective view of the drum-type washing machine water receiving tank body Perspective view of the drum-type washing machine water receiving tank cover Bottom plan view of the rotating drum of the drum type washing machine (viewed from right A in FIG. 1) Sectional drawing of the principal part of the rotating drum of the drum type washing machine Sectional drawing of the principal part of the rotating drum of the drum type washing machine in Embodiment 2 of this invention. (A) External view of rib attachment member of drum type washing machine in Embodiment 3 of the present invention, (b) Main part sectional view of the same rib attachment member. Sectional drawing of the principal part of the drum-type washing machine rotary drum in Embodiment 4 of this invention. The bottom part top view of the rotating drum of the drum type washing machine in Embodiment 5 of this invention (arrow view from right side A of FIG. 1) A longitudinal sectional view showing the structure of a conventional drum-type washing machine

DESCRIPTION OF SYMBOLS 1 Washing machine main body 3a 1st opening part 5 Rotating drum 5a 2nd opening part 6 Water receiving tank 7 Motor 20 Water intake 22 1st circulating water channel 26 2nd circulating water channel 27 3rd circulating water channel 28 4th circulating water channel 34 Discharge port 35 Drum fixing member 37 Rib mounting member 38 Rib

Claims (4)

A bottomed cylindrical water receiving tub enclosed in the washing machine main body and having a first opening for entering and exiting clothes, and a second opening rotatably included in the water receiving tub and corresponding to the first opening A cylindrical rotating drum having a bottom and a horizontal axis or a rotating shaft inclined from the horizontal direction, a motor that rotationally drives the rotating drum, and the water receiving tank are configured to rotate the rotating drum. A water intake port through which washing water that rotates in the receiving tub enters, a circulation water channel that communicates with the water intake port at one end, and a discharge port that communicates with the other end of the circulation water channel and discharges the wash water into the rotary drum. A drum fixing member for rotating and supporting the rotating drum on the outer surface side of the rotating drum bottom, and a plurality of substantially arc box-shaped rib mounting members having ribs formed on the bottom of the water receiving tank. The member is connected to the rib mounting member Forming a extended portion of the eye, the rib in the mounting member to form an extended rib portion for coupling with the extended portion, a bottom portion of the water tub than the extending portion is the extending rib portions The extension part and the extension rib part are overlapped and connected so that the extension rib part is located on the first opening part side of the extension part while being located on the side. Drum type washing machine. The extending portion is formed on the side surface of the drum fixing member, and is disposed so that the extending portion and the extending rib portion are opposed to each other. The extending portion has a positioning pin and a boss hole for a mounting screw. The drum-type washing machine according to claim 1 , wherein through holes having different diameters are alternately arranged in the extending rib portion. The drum-type washing machine according to claim 1 or 2, wherein the rib attachment member has one or a plurality of boss holes in the outer wall, and a small hole is provided in the outer peripheral wall of the rotating drum corresponding to the boss hole. A convex portion is formed at the center portion of the bottom outer plane of the rib mounting member, the convex portion is brought into contact with the rotating drum bottom portion, and a triangular rib is provided on the inner peripheral vertical wall surface of the extending rib portion of the rib mounting member. The drum type washing machine according to any one of claims 1 to 3, wherein the triangular rib is pressed and fixed by a drum fixing member.

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