Washing machine

Abstract

The present invention provides a washing machine that can prevent washing water from entering the rinse water passage in the support shaft. [Solution] The dishwasher comprises a nozzle having a first injection hole for spraying wash water and a second injection hole for spraying rinse water, a support part having a shaft that rotatably supports the nozzle and forms part of the flow path for rinse water leading to the nozzle, and a header that is externally mounted on the support part and forms part of the flow path for wash water leading to the nozzle, and a bearing that is rotatably mounted on the shaft and separates the wash water flow path through which wash water flows from the rinse water flow path, and the header has a cover that covers the part of the bearing that is exposed to the wash water flow path.

Description

Technical Field

[0001] The present invention relates to a washing machine.

Background Art

[0002] Patent Document 1 discloses a washing machine including a nozzle provided in a washing chamber for accommodating an object to be washed, the nozzle spraying washing water or rinsing water into the washing chamber while rotating in one direction, and a support portion provided in the washing chamber for rotatably supporting the nozzle.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] As shown in FIG. 13, a conventional washing machine 200 includes a nozzle 210 having a first injection hole for injecting washing water and a second injection hole for injecting rinsing water, a support portion 220 that rotatably supports the nozzle 210 and forms part of a flow path for rinsing water leading to the nozzle 210, and a header 230 that is externally mounted on the support portion 220 and forms part of a flow path for washing water leading to the nozzle 210. The support portion 220 has a shaft 221 that forms part of the flow path for rinsing water. A bearing 211 is attached to the nozzle 210. The bearing 211 is externally inserted into the shaft 221 and is rotatable with respect to the shaft 221, separating a water flow path through which washing water flows from a rinsing water flow path through which rinsing water flows. The header 230 has a main body 231, an outer portion 232 that is externally mounted on the shaft 221, and an arm 233 that connects the main body 231 and the outer portion 232.

[0005] In the washing machine 200, as indicated by the arrows in Figure 13, washing water may travel along the arm 233 and the outer casing 232, enter the gap between the shaft 221 and the bearing 211, pass through the supply hole 221A of the shaft 221, and enter the flow path of the shaft 221. If washing water enters the flow path of the shaft 221 and flows back, the rinse water may be contaminated by the washing water.

[0006] The present invention aims to provide a washing machine that can prevent washing water from entering the rinse water passage in the support shaft. [Means for solving the problem]

[0007] The washing machine according to the present invention comprises a nozzle having a first injection hole for spraying washing water and a second injection hole for spraying rinsing water; a support part having a shaft that rotatably supports the nozzle and forms part of the flow path for rinsing water leading to the nozzle; and a header that is externally mounted on the support part and forms part of the flow path for washing water leading to the nozzle. The nozzle is fitted with a bearing that is rotatably mounted on the shaft and separates a washing water flow path through which washing water flows from a rinsing water flow path. The header has a cover that covers the portion of the bearing exposed to the washing water flow path.

[0008] In the cleaning machine according to the present invention, the header has a cover that covers the portion of the bearing that is exposed to the cleaning water flow path. In this way, by covering the bearing with the cover, the cleaning machine can prevent the cleaning water flowing through the cleaning water flow path from directly entering the gap between the shaft and the bearing, and can also lengthen the path the cleaning water takes to reach the gap between the shaft and the bearing. As a result, the cleaning machine can prevent the cleaning water from entering the gap between the shaft and the bearing. Therefore, the cleaning machine can prevent the cleaning water from entering the rinse water flow path in the shaft of the support part.

[0009] In the cleaning machine according to the present invention, the shape of the inner surface of the cover corresponds to the shape of the outer surface of the bearing, and a step may be provided on the inner surface of the cover. In this configuration, because a step is provided on the inner surface of the cover, the flow of the cleaning water is altered by the step, making it more difficult for the cleaning water to flow. In addition, the step allows the cleaning water to travel along the inner surface of the cover to a longer path to the gap between the shaft and the bearing. Therefore, the cleaning machine can prevent the cleaning water from entering the gap between the shaft and the bearing. [Effects of the Invention]

[0010] According to the present invention, it is possible to prevent cleaning water from entering the rinse water flow path in the support shaft. [Brief explanation of the drawing]

[0011] [Figure 1] Figure 1 is a perspective view of a dishwasher according to one embodiment. [Figure 2] Figure 2 is a cross-sectional view showing the schematic configuration of a dishwasher. [Figure 3] Figure 3 is a perspective view of the upper nozzle. [Figure 4] Figure 4 is a perspective view showing the cross-sectional configuration of the upper nozzle and upper support. [Figure 5] Figure 5(a) is a perspective view of the header, Figure 5(b) is a view of the header from above, and Figure 5(c) is a view of the header from below. [Figure 6] Figures 6(a) and 6(b) show the cross-sectional configuration of the header. [Figure 7] Figure 4 is a magnified view of a portion of Figure 4. [Figure 8] Figure 8 is a perspective view of the lower nozzle. [Figure 9] Figure 9 is a perspective view showing the cross-sectional configuration of the lower nozzle and lower support. [Figure 10] Figure 10(a) is a perspective view of the header, Figure 10(b) is a view of the header from above, and Figure 10(c) is a view of the header from below. [Figure 11] FIG. 11(a) and FIG. 11(b) are diagrams showing the cross-sectional configuration of the header. [Figure 12] FIG. 12 is a perspective view showing the cross-sectional configuration of the upper nozzle and the upper support according to another embodiment. [Figure 13] FIG. 13 is a perspective view showing the cross-sectional configuration of the nozzle, the support portion, and the header of a conventional dishwashing machine.

Mode for Carrying Out the Invention

[0012] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and overlapping descriptions are omitted. The dimensional ratios in the drawings do not necessarily match those in the description. In the following description, for the sake of convenience of explanation, the directions defined in FIG. 1 (vertical direction, front-rear direction, left-right direction (width direction)) are defined.

[0013] FIG. 1 is a perspective view of a dishwashing machine according to an embodiment. FIG. 2 is a cross-sectional view showing the schematic configuration of the dishwashing machine. As shown in FIGS. 1 and 2, the dishwashing machine (washing machine) 1 has a washing machine body 2 covered with a stainless steel panel. The washing machine body 2 is partitioned into an upper portion 2A in which a washing chamber 3 is formed and a lower portion 2B in which a machine chamber 4 is formed. At the corner portion on the back side of the washing machine body 2, columns 6 extending vertically across the upper portion 2A and the lower portion 2B are arranged, and a back panel 5 is arranged between the columns 6, 6.

[0014] In the upper portion 2A of the washing machine body 2, a box-shaped door 7 for opening and closing the washing chamber 3 is provided. This door 7 is guided to be vertically movable by a pair of stainless steel columns 6, 6 and is vertically moved by a handle 8A extending horizontally in the front.

[0015] At both ends of this handle 8A, the tips of a pair of left and right pivoting arms 8B, 8B are fixed, and the pivoting arms 8B, 8B are obliquely arranged along the side surface 7A of the door 7. One end of a link portion 8C arranged along the side surface 7A of the door 7 is rotatably connected to the pivoting arms 8B, 8B, and the other end of the link portion 8C is connected to the door 7 via a shaft pin 8D, enabling the door 7 to move up and down with respect to the rotational movement of the handle 8A. Legs 9 are attached to the four corners of the bottom surface of the cleaning machine body 2.

[0016] As shown in FIG. 2, a rack rail 10 is detachably arranged in the cleaning chamber 3, and a grid-like dish rack on which dishes (objects to be cleaned) such as plates and bowls after eating and drinking are arranged is placed on this rack rail 10. An upper nozzle 11 is arranged above the cleaning chamber 3. A lower nozzle 12 is arranged below the cleaning chamber 3.

[0017] At the bottom of the cleaning chamber 3, a cleaning water tank 15 is provided so as to project into the machine chamber 4. A filter 16 is detachably arranged between the cleaning chamber 3 and the cleaning water tank 15. A cleaning pump 17 is connected to the front surface of the cleaning water tank 15 via a cleaning water suction port. A cleaning water discharge pipe 18 is connected to the discharge port of the cleaning pump 17. The cleaning water discharge pipe 18 branches into a first cleaning water discharge pipe 18A and a second cleaning water discharge pipe 18B. The first cleaning water discharge pipe 18A is connected to the upper nozzle 11, and the second cleaning water discharge pipe 18B is connected to the lower nozzle 12.

[0018] In the machine chamber 4, a rinsing water tank 19 into which rinsing water is supplied via a water supply pipe (not shown) from the outside is arranged. A rinsing pump 21 is connected to the rinsing water tank 19 via a rinsing water suction pipe 20. A rinsing water discharge pipe 22 is connected to the discharge port of the rinsing pump 21. The rinsing water discharge pipe 22 branches into a first rinsing water discharge pipe 22A and a second rinsing water discharge pipe 22B, and the first rinsing water discharge pipe 22A is connected to the upper nozzle 11, and the second rinsing water discharge pipe 22B is connected to the lower nozzle 12.

[0019] The machine room 4 houses an electrical box (not shown) containing a controller 23 that controls the overall operation of the dishwasher 1.

[0020] Figure 3 is a perspective view of the upper nozzle 11. As shown in Figure 3, the upper nozzle 11 is located above the washing chamber 3. The upper nozzle 11 is rotatably mounted on an upper support 13 located above the washing chamber 3. The upper nozzle 11 has a main body 30 that extends radially from the base end, which is the rotation center of the rotation axis of the upper nozzle 11, to the tip. The main body 30 integrally includes a washing injection hole (first injection hole) 31 for injecting washing water stored in the washing water tank 15, a washing channel (not shown) extending from the rotation center to the washing injection hole 31 through which washing water flows, a rinsing injection hole (second injection hole) 33 for injecting rinsing water stored in the rinsing water tank 19, and a rinsing channel (not shown) extending from the rotation center to the rinsing injection hole 33 through which rinsing water flows. The upper nozzle 11 rotates when the flow of cleaning water generated in the cleaning channel or the flow of rinsing water generated in the rinsing channel is converted into rotational force.

[0021] The upper nozzle 11 is connected to a first wash water discharge pipe 18A that supplies wash water to the washing channel and a first rinse water discharge pipe 22A that supplies rinse water to the rinsing channel. The first rinse water discharge pipe 22A is located inside the first wash water discharge pipe 18A. In other words, the first wash water discharge pipe 18A and the first rinse water discharge pipe 22A form a double-pipe structure.

[0022] The upper nozzle 11 is equipped with a detachment mechanism 37 for attaching and detaching the main body 30 from the upper support 13 provided in the washing chamber 3. The detachment mechanism 37 has a pair of knobs 37a, 37a. The pair of knobs 37a, 37a protrude from the outer shape of the main body 30 along the operating direction (arrow direction). The detachment mechanism 37 can attach and detach the main body 30 from the upper support 13 by pressing both of the pair of knobs 37a, 37a toward each other along the operating direction.

[0023] Figure 4 is a perspective view showing the cross-sectional configuration of the upper nozzle 11 and the upper support 13. As shown in Figure 4, the upper support 13 has an upper support portion 130 and a header 131.

[0024] The upper support portion 130 rotatably supports the upper nozzle 11 and also forms part of the flow path for the rinse water leading to the upper nozzle 11. The upper support portion 130 includes a shaft 132 and a connecting bearing (not shown).

[0025] The shaft 132 is a hollow member. In this embodiment, the shaft 132 has a cylindrical shape. The shaft 132 is inserted into the first rinse water discharge pipe 22A. Specifically, the upper end of the shaft 132 is inserted into the lower end of the first rinse water discharge pipe 22A. The shaft 132 has a supply channel 132A and a supply hole 132B.

[0026] The supply channel 132A allows rinse water supplied from the first rinse water discharge pipe 22A to flow into the shaft 132. Rinse water is supplied to the supply channel 132A from an inlet (not shown) located at the upper end of the shaft 132. The supply hole 132B supplies rinse water to the upper nozzle 11. The supply hole 132B supplies the rinse water that has flowed in from the inlet to the rinse channel of the upper nozzle 11. In this embodiment, a plurality (for example, four) of supply holes 132B are provided. The supply holes 132B are formed to penetrate the inside and outside of the shaft 132. The supply holes 132B are arranged at predetermined intervals in the circumferential direction of the shaft 132. The supply holes 132B are, for example, circular in shape.

[0027] The connecting bearing is rotatably mounted on the shaft 132. The attachment / detachment mechanism 37 of the upper nozzle 11 is connected to the connecting bearing. The upper nozzle 11 is integrated with the connecting bearing by the engagement portion (not shown) of the attachment / detachment mechanism 37 engaging with the connecting bearing. As a result, the upper nozzle 11 is rotatably mounted on the upper support portion 130.

[0028] The upper nozzle 11 is fitted with a first bearing 34 and a second bearing 35. The first bearing 34 is inserted into the connection portion 11A of the upper nozzle 11. The first bearing 34 is slidably mounted on the shaft 132 and rotatably mounted on the shaft 132. The first bearing 34 is located at the lower end of the shaft 132.

[0029] The second bearing 35 is inserted into the connection portion 11A of the upper nozzle 11. The second bearing 35 is externally mounted so as to be slidable with respect to the shaft 132 and is rotatably mounted with respect to the shaft 132. The second bearing 35 is located at the upper end of the shaft 132. The second bearing 35 separates the washing water channel F1 through which washing water flows from the rinsing water channel F2 through which rinsing water flows. The washing water channel F1 is formed by the first washing water discharge pipe 18A and the header 131 connected to the first washing water discharge pipe 18A. The rinsing water channel F2 is formed by the connection portion 11A of the upper nozzle 11 located inside the header 131 and the shaft 132. The washing water channel F1 and the rinsing water channel F2 are formed by a double-pipe structure. The connection portion 11A of the upper nozzle 11 is part of the partition wall separating the washing water channel F1 and the rinsing water channel F2, and constitutes the tip (upper end) of the partition wall. The second bearing 35 is inserted into the tip of the connection portion 11A of the upper nozzle 11. When the upper nozzle 11 is attached to the upper support portion 130 (inserted into the shaft 132), the second bearing 35, together with the partition wall, separates the washing water channel F1 and the rinsing water channel F2.

[0030] The header 131 is externally mounted on the upper support portion 130 and forms part of the flow path for the cleaning water leading to the upper nozzle 11. The flow path for the cleaning water is formed by including the first cleaning water discharge pipe 18A and the header 131. Figure 5(a) is a perspective view of the header 131, Figure 5(b) is a view of the header 131 from above, and Figure 5(c) is a view of the header 131 from below. Figures 6(a) and 6(b) show the cross-sectional configuration of the header 131.

[0031] As shown in Figures 5(a) to 5(c), Figure 6(a) and Figure 6(b), the header 131 has a main body 135, a cover 136, and an arm 137. The main body 135 is attached to the first wash water discharge pipe 18A. The main body 135 has a cylindrical shape. The lower end of the main body 135 protrudes outward. The main body 135 is inserted into the lower end of the first wash water discharge pipe 18A. The main body 135 is fixed to the first wash water discharge pipe 18A, for example, by a screw.

[0032] The cover 136 covers the portion of the second bearing 35 of the upper nozzle 11 that is exposed to the cleaning water channel F1. Figure 7 is an enlarged view of a portion of Figure 4. As shown in Figure 7, the cover 136 covers the upper end of the second bearing 35 of the upper nozzle 11. The lower end of the cover 136 is located below the portion of the second bearing 35 that is exposed to the cleaning water channel F1. The cover 136 also covers a portion of the connection portion 11A of the upper nozzle 11. The cover 136 has an insertion hole 136H into which the shaft 132 is inserted.

[0033] The shape of the inner surface 136S of the cover 136 corresponds to the shape of the outer surface of the second bearing 35 and the outer surface of the connection portion 11A of the upper nozzle 11. Corresponding shapes mean, for example, that the shapes are generally similar, but are not limited to this. When the shapes are superimposed, if the spacing between the outlines of one shape and the other shape is generally uniform throughout, this is also included in the correspondence between the shapes. When they are generally similar, the majority of the outline of the other shape may coincide with a line that is perfectly similar to one shape, or a predetermined percentage or more of the outline of the other shape may coincide.

[0034] The inner surface 136S of the cover 136 is composed of a first surface 136A, a second surface 136B, a third surface 136C, and a fourth surface 136D. The first surface 136A is the surface facing the upper end surface of the second bearing 35. The second surface 136B is the surface facing the upper outer surface (side surface) of the second bearing 35. The second surface 136B is a continuous surface with the first surface 136A. The third surface 136C is the surface facing the outer surface (side surface) of the connection portion 11A. The third surface 136C is located radially outward of the cover 136 than the second surface 136B. That is, the diameter of the third surface 136C is larger than the diameter of the second surface 136B. The fourth surface 136D is the surface connecting the second surface 136B and the third surface 136C. A step S1 is provided on the inner surface 136S by the fourth surface 136D.

[0035] The arm 137 connects the main body 135 and the cover 136. In this embodiment, a plurality (for example, four) of arms 137 are provided. The arms 137 are arranged at predetermined intervals around the circumferential direction of the main body 135.

[0036] Next, the lower nozzle 12 and the lower support 14 will be described in detail.

[0037] Figure 8 is a perspective view of the lower nozzle 12. As shown in Figure 8, the lower nozzle 12 is located below the washing chamber 3. The lower nozzle 12 is rotatably mounted on a lower support 14 located below the washing chamber 3. The lower nozzle 12 has a main body portion 40 that extends radially from the base end, which is the rotation center of the rotation axis of the lower nozzle 12, to the tip. The main body portion 40 integrally includes a washing injection hole (first injection hole) 41 for injecting washing water stored in the washing water tank 15, a washing channel (not shown) extending from the rotation center to the washing injection hole 41 and through which washing water flows, a rinsing injection hole (second injection hole) 43 for injecting rinsing water stored in the rinsing water tank 19, and a rinsing channel (not shown) extending from the rotation center to the rinsing injection hole 43 and through which rinsing water flows. The lower nozzle 12 rotates when the flow of cleaning water generated in the cleaning channel or the flow of rinsing water generated in the rinsing channel is converted into rotational force.

[0038] The lower nozzle 12 is connected to a second wash water discharge pipe 18B that supplies wash water to the washing channel and a second rinse water discharge pipe 22B that supplies rinse water to the rinsing channel. The second rinse water discharge pipe 22B is located inside the second wash water discharge pipe 18B. In other words, the second wash water discharge pipe 18B and the second rinse water discharge pipe 22B form a double-pipe structure.

[0039] The lower nozzle 12 is equipped with a detachment mechanism 47 for attaching and detaching the main body 40 from the lower support 14 provided in the washing chamber 3. The detachment mechanism 47 has a pair of knobs 47a, 47a. The pair of knobs 47a, 47a protrude from the outer shape of the main body 40 along the operating direction (arrow direction). The detachment mechanism 47 can attach and detach the main body 40 from the lower support 14 by pressing both of the pair of knobs 47a, 47a toward each other along the operating direction.

[0040] Figure 9 is a perspective view showing the cross-sectional configuration of the lower nozzle 12 and the lower support 14. As shown in Figure 9, the lower support 14 has a lower support portion 140 and a header 141.

[0041] The lower support portion 140 rotatably supports the lower nozzle 12 and also forms part of the flow path for rinse water leading to the lower nozzle 12. The lower support portion 140 includes a shaft 142 and a connecting bearing (not shown).

[0042] The shaft 142 is a hollow member. In this embodiment, the shaft 142 has a cylindrical shape. The shaft 142 is inserted into the second rinse water discharge pipe 22B. Specifically, the lower end of the shaft 142 is inserted into the upper end of the second rinse water discharge pipe 22B. The shaft 142 has a supply channel 142A and a supply hole 142B.

[0043] The supply channel 142A allows rinse water supplied from the second rinse water discharge pipe 22B to flow into the shaft 142. Rinse water is supplied to the supply channel 142A from an inlet (not shown) located at the lower end of the shaft 142. The supply hole 142B supplies rinse water to the lower nozzle 12. The supply hole 142B supplies the rinse water that has flowed in from the inlet to the rinse channel of the lower nozzle 12. In this embodiment, a plurality of (for example, four) supply holes 142B are provided. The supply holes 142B are formed to penetrate the inside and outside of the shaft 142. The supply holes 142B are arranged at predetermined intervals in the circumferential direction of the shaft 142. The supply holes 142B are, for example, circular in shape.

[0044] The connecting bearing is rotatably mounted on the shaft 142. The attachment / detachment mechanism 47 of the lower nozzle 12 is connected to the connecting bearing. The lower nozzle 12 is integrated with the connecting bearing by the engagement portion (not shown) of the attachment / detachment mechanism 47 engaging with the connecting bearing. As a result, the lower nozzle 12 is rotatably mounted on the lower support portion 140.

[0045] The lower nozzle 12 is fitted with a first bearing 44 and a second bearing 45. The first bearing 44 is inserted into the connection portion 12A of the lower nozzle 12. The first bearing 44 is slidably mounted on the shaft 142 and rotatably mounted on the shaft 142. The first bearing 44 is located at the upper end of the shaft 142.

[0046] The second bearing 45 is inserted into the connection portion 12A of the lower nozzle 12. The second bearing 45 is slidably mounted on the shaft 142 and rotatably mounted on the shaft 142. The second bearing 45 is located at the lower end of the shaft 142. The second bearing 45 separates the washing water channel F3 through which washing water flows from the rinsing water channel F4 through which rinsing water flows. The washing water channel F3 is formed by the second washing water discharge pipe 18B and the header 141 connected to the second washing water discharge pipe 18B. The rinsing water channel F4 is formed by the connection portion 12A of the lower nozzle 12 located inside the header 141 and the shaft 142. The washing water channel F3 and the rinsing water channel F4 are formed by a double-pipe structure. The connection portion 12A of the lower nozzle 12 is part of the partition wall separating the washing water channel F3 and the rinsing water channel F4, and constitutes the tip (lower end) of the partition wall. The second bearing 45 is inserted into the tip of the connection portion 12A of the lower nozzle 12. When the lower nozzle 12 is attached to the lower support portion 140 (inserted into the shaft 142), the second bearing 45, together with the partition wall, separates the washing water channel F3 and the rinsing water channel F4.

[0047] The header 141 is externally mounted on the lower support portion 140 and forms part of the flow path for the cleaning water leading to the lower nozzle 12. The flow path for the cleaning water is formed by including the second cleaning water discharge pipe 18B and the header 141. Figure 10(a) is a perspective view of the header 141, Figure 10(b) is a view of the header 141 from above, and Figure 10(c) is a view of the header 141 from below. Figures 11(a) and 11(b) show the cross-sectional configuration of the header 141.

[0048] As shown in Figures 10(a) to 10(c), Figure 11(a), and Figure 11(b), the header 141 has a body 145, a cover 146, and an arm 147. The body 145 is attached to the second wash water discharge pipe 18B. The body 145 has a cylindrical shape. The central part of the body 145 protrudes outward. The body 145 is inserted into the upper end of the second wash water discharge pipe 18B. The body 145 is fixed to the second wash water discharge pipe 18B, for example, by a screw.

[0049] The cover 146 covers the portion of the second bearing 45 of the lower nozzle 12 that is exposed to the cleaning water flow path F3. The cover 146 covers the lower end of the second bearing 45 of the lower nozzle 12. The upper end of the cover 146 is located above the portion of the second bearing 45 that is exposed to the cleaning water flow path F3. The cover 146 also covers a portion of the connection portion 12A of the lower nozzle 12. The cover 146 has an insertion hole 146H into which the shaft 142 is inserted.

[0050] The shape of the inner surface 146S of the cover 146 corresponds to the shape of the outer surface of the second bearing 45 and the outer surface of the connection portion 12A of the lower nozzle 12. The inner surface 146S of the cover 146 is composed of a first surface 146A, a second surface 146B, a third surface 146C, and a fourth surface 146D. The first surface 146A is the surface facing the lower end surface of the second bearing 45. The second surface 146B is the surface facing the lower outer surface (side surface) of the bearing 144. The second surface 146B is a continuous surface with the first surface 146A. The third surface 146C is the surface facing the outer surface (side surface) of the connection portion 12A. The third surface 146C is located radially outward of the cover 146 than the second surface 146B. That is, the diameter of the third surface 146C is larger than the diameter of the second surface 146B. The fourth surface 146D is the surface that connects the second surface 146B and the third surface 146C. A step S2 is provided on the inner surface 146S by the fourth surface 146D.

[0051] The arm 147 connects the main body 145 and the cover 146. In this embodiment, a plurality (for example, four) of arms 147 are provided. The arms 147 are arranged at predetermined intervals around the circumferential direction of the main body 145.

[0052] As described above, in the dishwasher 1 according to this embodiment, the header 131(141) has a cover 136(146) that covers the portion of the second bearing 35(45) that is exposed to the wash water passage F1(F3). The second bearing 35(45) is rotatably positioned at the attachment / detachment portion between the upper nozzle 11 (lower nozzle 12) and the upper support portion 130 (lower support portion 140), and also serves as a component that separates the wash water passage F1 and the rinse water passage F2, making it a part that is easily exposed to wash water. In the dishwasher 1, by covering the second bearing 35(45) with the cover 136(146), it is possible to suppress the wash water flowing through the wash water passage F1(F3) from directly entering the gap between the shaft 132(142) and the second bearing 35(45), and to lengthen the path of the wash water to the gap between the shaft 132(142) and the second bearing 35(47). This prevents washing water from entering the gap between the shaft 132 (142) and the second bearing 35 (45) in the dishwasher 1. Therefore, in the dishwasher 1, it is possible to prevent washing water from entering the rinse water flow path in the shaft 132 (142) of the upper support part 130 (lower support part 140).

[0053] In the dishwasher 1 according to this embodiment, the shape of the inner surface 136S(146S) of the cover 136(146) corresponds to the shape of the outer surface of the second bearing 35(45). A step S1(S2) may be provided on the inner surface 136S(146S) of the cover 136(146). In this configuration, because a step S1(S2) is provided on the inner surface 136S(146S) of the cover 136(146), the flow of the washing water is altered by the step S1(S2), making it more difficult for the washing water to flow. In addition, in the dishwasher 1, the step S1(S2) allows the path of the washing water from the inner surface 136S(146S) of the cover 136(146) to the gap between the shaft 132(142) and the second bearing 35(45) to be made longer. Therefore, in dishwasher 1, it is possible to prevent washing water from entering the gap between the shaft 132 (142) and the second bearing 35 (45).

[0054] While embodiments of the present invention have been described above, the present invention is not necessarily limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention.

[0055] In the above embodiment, a step S1 was described as an example in which a step S1 is provided on the inner surface 136S of the cover 136 of the header 131 of the upper support 13. However, as shown in Figure 12, a step is not required on the inner surface 136S of the cover 136. Similarly, a step is not required on the inner surface 146S of the cover 146 of the header 141 of the lower support 14.

[0056] In the above embodiment, a washing machine in which the door 7 is provided to be movable in the vertical direction was described as an example. However, it can also be applied to dishwashers and the like in which the door is provided on the front side of the washing machine body, such as an oven.

[0057] The present invention may be appropriately combined as described above as embodiments, modifications, and other modifications, without departing from the spirit of the invention. [Explanation of Symbols]

[0058] 1...Dishwasher (washer), 11...Upper nozzle, 12...Lower nozzle, 31,41...Washing spray hole (first spray hole), 33,43...Rinse spray hole (second spray hole), 35,45...Second bearing, 130...Upper support part, 140...Lower support part, 131,141...Header, 132,142...Shaft, 136,146...Cover, 136S,146S...Inner surface, F1,F3...Washing water flow path, F2,F4...Rinse water flow path, S1,S2...Step.

Claims

1. A nozzle having a first spray hole for spraying cleaning water and a second spray hole for spraying rinsing water, A support portion having a shaft that rotatably supports the nozzle and forms part of the flow path of the rinse water leading to the nozzle, The support portion is enclosed by a header which forms part of the flow path for the cleaning water leading to the nozzle, The nozzle is fitted with a bearing that is rotatably mounted on the shaft and separates the washing water passage through which the washing water flows from the rinsing water passage. The header has a cover that covers the portion of the bearing that is exposed to the cleaning water channel, in the cleaning machine.

2. The shape of the inner surface of the cover corresponds to the shape of the outer surface of the bearing. The washing machine according to claim 1, wherein a step is provided on the inner surface of the cover.

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