JP2000287905A - Mounting structure of arm for dishwasher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent difficulty in taking the arm for injecting washing water off the bottom part of a washing chamber. SOLUTION: In a mounting structure C of an arm of this dishwasher, a lower part of a cylindrical support shaft 6 is fixed in a mounting hole 3k in a protruded part 3c on a bottom part 3a of a washing chamber. A mid part and an upper part of the support shaft 6 are inserted inside from a hole 5b of the arm 5 and the arm 5 is placed on the bottom part 3a. The support shaft 6 and the arm 5 are mutually fitted so that the arm 5 is positioned to be detachably placed on a carrier part 3e or the like of the protruded part 3c. Water is guided into the arm 5 while receiving a water pressure inside with a partition member 6a of the support shaft 6. The top part 51 of the arm 5 is provided with pressure bleeding holes 51f and 51g above a communication hole 6u of the partition plate 6a thereby preventing the arm 5 from slipping off.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a dishwasher for washing dishes and the like. In particular, the present invention relates to an arm mounting structure for mounting an arm having a jet port for jetting cleaning water to a cleaning chamber.

[0002]

2. Description of the Related Art In a dishwasher, for example, a dish basket is arranged inside a closed washing room, and dishes are put in the dish basket to wash. At the time of washing, water is sprayed from a spray port provided on a hollow arm below the tableware basket. The arm is rotatably provided at the bottom of the cleaning chamber,
Water is pumped into the arm from a pump provided below the cleaning chamber.

[0003] The arm is mounted as follows. That is, the cylindrical support shaft is fixed to the hole formed at the bottom of the cleaning chamber. The arm is provided with a through hole through which the support shaft extends and extends vertically. When the through-hole of the arm is passed through the support shaft, in this state, the upper end of the support shaft comes out above the arm. A male screw is formed at the upper end of the support shaft, and a nut is screwed into the male screw to fix the arm from above from the support shaft from the nut.

[0004]

However, in the structure in which the nut is screwed in and fixed, the screw may be tightly tightened, making it difficult to remove the nut. In such a case, it is difficult to remove the arm, and it is also difficult to clean the dishwasher. In addition, for manufacturing a nut, for example, a complicated mold is required for resin molding. Therefore, it is difficult to reduce the manufacturing cost, and it is preferable if such components can be eliminated.

An object of the present invention is to solve the above-mentioned technical problems and to provide a dishwasher arm mounting structure capable of easily attaching and detaching the arm and reducing the manufacturing cost.

[0006]

According to a first aspect of the present invention, there is provided an arm mounting structure for mounting an arm having a jet for spraying water in a washing room of a dishwasher to a bottom portion of the washing room. Wherein the bottom of the cleaning chamber has an upright shaft, which is inserted into a hole formed in the lower surface of the arm, and the arm is removably mounted on the bottom of the cleaning chamber. It is characterized by having.

According to this configuration, when the shaft is inserted into the hole of the arm and the arm is placed on the bottom of the cleaning chamber, the position of the arm is regulated in the horizontal direction by the shaft, so that water can be sprayed from the spray port. it can. When the water is sprayed, the reaction force pushes the arm downward, so that the arm is prevented from coming off.
Since the arm is only placed on the bottom of the cleaning chamber, it can be easily removed and the cleaning work can be reduced.

Since a simple structure for mounting is sufficient, a structure for retaining the structure can be omitted. As a result, the number of parts can be reduced and the structure can be simplified. Moreover, at the time of assembling, it is only necessary to mount the arm, so that the labor is reduced. Therefore, manufacturing costs can be reduced. Here, the arm may be mounted on a peripheral portion of the shaft, or may be mounted on the shaft.

According to a second aspect of the present invention, in the arm mounting structure of the first aspect, the arm has a hollow structure through which water passes, and the shaft is formed in a cylindrical shape. An opening through which water flows from the bottom of the washing chamber into the inside thereof, and an opening through which water flows from the inside to the inside of the arm, and a pressure receiving member receiving upward water pressure is provided above the opening to the inside of the arm. A pressure release hole is formed at a position above the pressure receiving member on the upper surface of the arm with the shaft inserted into the hole of the arm.

According to this configuration, water is sent from the bottom of the cleaning chamber to the inside of the arm through the inside of the shaft. At this time,
Water pressure is applied upward at the upper end of the shaft, but is received at the bottom of the cleaning chamber via the pressure receiving member and the shaft. As a result, the arm can be prevented from coming off. Furthermore, even if an upward water pressure is applied to the arm above the pressure receiving member, the water pressure is released through the pressure release hole, so that the arm can be reliably prevented from coming off.

[0011] Further, the detergency can be enhanced by the water blown out from the pressure release holes. Here, the pressure receiving member may be a member to which upward water pressure is applied. Claim 3
In the arm mounting structure according to claim 2, in the arm mounting structure according to claim 2, the pressure receiving member has an inclined surface that inclines upward from an inside of the shaft toward an opening into the inside of the arm; A communication hole formed at the lowest part and opening upward; and the pressure release hole is formed at a position above the communication hole of the pressure receiving member so as to be larger than the communication hole.

According to this configuration, at the time of washing, water can be smoothly sent to the injection port of the arm by the inclined surface, and washing can be performed efficiently. In addition, water that has accumulated above the pressure receiving member during cleaning can be drained downward through the communication hole when operation is stopped, so that water can be prevented from accumulating on the upper surface of the inclined surface. Further, since the pressure release hole is larger than the communication hole, even if a foreign matter passes through the communication hole, it can be smoothly discharged from the pressure release hole.

According to a fourth aspect of the present invention, there is provided the arm mounting structure according to the second or third aspect, wherein the upper surface of the arm is fitted with a portion near the upper end of the shaft with a gap therebetween. The pressure relief hole is provided at a position directly above the gap. According to this configuration,
At the end of mounting the arm, the work can be easily performed by fitting the vicinity of the upper end of the shaft to the upper surface of the arm.

Further, even if water passes through the above-described gap in the arm during washing, the water pressure applied to the arm can be reduced by the pressure release hole, so that the arm can be more reliably prevented from coming off. Furthermore, even if foreign matter in water enters the gap at the time of cleaning, the foreign matter is discharged from the gap through the pressure release hole, so that the foreign matter can be prevented from clogging the gap.

According to a fifth aspect of the present invention, in the arm mounting structure according to any one of the second to fourth aspects, the pressure release hole includes a slope having a wide outlet side. . According to this configuration, if the pressure release hole has a slope, water can be blown obliquely along the slope, so that the cleaning ability can be enhanced as compared with a case where water is blown directly above. Also, because the exit was widened,
As a result, the foreign matter can smoothly pass through the pressure release hole, thereby preventing the foreign matter from being clogged.

According to a sixth aspect of the present invention, in the arm mounting structure according to any one of the first to fifth aspects, a tableware is provided above the arm mounted on the bottom of the washing chamber. A basket is arranged, a predetermined interval is provided between the lower surface of the tableware basket and the upper surface of the arm, and the shaft enters the hole of the arm at a distance longer than the predetermined interval. I do.

According to this configuration, even if the arm is lifted by water pressure, the lifting amount is regulated by colliding with the lower surface of the tableware basket, so that the arm can be more securely removed. Can be prevented.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a dishwasher according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a side sectional view of a schematic configuration of the above-described dishwasher. The dishwasher 1 has a cabinet 2 forming an outer shape. An operation panel (not shown) for operating the dishwasher 1 is provided at a lower portion of the front surface of the cabinet 2. The operation panel is provided in a watertight state on a front surface of a case 22 disposed at a lower part of a front surface of the cabinet 2, and a circuit board 24 for operating the dishwasher 1 and the like are housed in the case 22 behind the operation panel. Have been. An opening / closing door 21 is attached above the case 22 so as to be openable and closable by an opening / closing mechanism 27. Inside the cabinet 2 at the back of the door 21, a washing room 3 for washing dishes is arranged.

The cleaning chamber 3 is formed in a box shape and has a front opening. The front opening is closed by the opening / closing door 21 at the time of cleaning. Inside the washing room 3, a dish basket 4 for holding tableware is detachably arranged, and below the dish basket 4,
An arm 5 having a plurality of injection ports 5a is arranged.
Wash water is injected from each injection port 5a of the arm 5. A pipe 11 and a solenoid valve 12 are provided behind the cleaning chamber 3, and can supply cleaning water into the cleaning chamber 3 from an external water supply facility (not shown) such as a water supply. The bottom 3a of the cleaning chamber 3 is formed in a container shape, and can store cleaning water therein. The bottom 3a of the cleaning chamber 3 has a lower step 3b, which is connected to a cleaning pump 14 via a pipe 13, and the outlet of the cleaning pump 14
5 is connected to the arm 5. Cleaning pump 1
When the operation of the cleaning chamber 4 is performed, the cleaning water is sucked from the recess 3 b of the cleaning chamber 3 and sent to the arm 5 by pressure. The arm 5 is rotatably supported around a support shaft 6 extending in the vertical direction. The arm 5 rotates the washing water from the injection port 5a while rotating due to a reaction force when the washing water is sprayed, particularly, its horizontal component. And wash the dishes evenly. Thereafter, the cleaning water returns to the bottom 3a of the cleaning chamber 3, and the cleaning is performed while circulating to the cleaning pump 14 and the arm 5. After the washing, the washing water is drained by a drain pump 16 through a drain pipe 17.

The arm 5 has a hollow structure through which water passes, and extends in the horizontal direction. The arm 5 includes an upper surface 51
And a lower surface portion 52. The peripheral portions of the upper surface portion 51 and the lower surface portion 52 are joined to each other, and water can be passed therebetween. Each of the above-mentioned injection ports 5a is provided on the upper surface portion 51, and water is injected in different directions upward or obliquely upward.

By the way, it is desirable that the arm 5 can be detached to clean the water channel of the arm 5 and the like and the inside of the washing chamber 3. In the present embodiment, the arm 5 can be easily attached to and detached from the bottom 3a of the washing chamber 3 with the following mounting structure C in a state where the tableware basket 4 is removed from the inside of the washing chamber 3. The details will be described below.

In the mounting structure C, the bottom 3a of the cleaning chamber 3 has a step 3c which is higher by one step, and the support shaft 6 is erected on the step 3c. The support shaft 6 is a tubular pipe member for sending water from the bottom 3 a of the cleaning chamber 3 to the inside of the arm 5, while positioning the arm 5 at the rotation center position at the bottom 3 a of the cleaning chamber 3. Support rotatably. As shown in FIG. 2, the support shaft 6 is inserted into the center of the arm 5 through a hole 5 b formed in the lower surface 52 of the arm 5. The support shaft 6 and the arm 5 are fitted to each other, but have a larger gap than a normal fitting gap. In this state, the arm 5 is provided with the projection 3c of the cleaning chamber 3.
Is removably mounted on the mounting portion 3e.

In particular, the arm 5 is merely placed on the bottom 3a of the cleaning chamber 3, and is not detached from the upper part by screwing or the like, and is in a detachable state. Water is passed through the arm 5. A cylindrical portion 3j extends downward from the convex portion 3c of the bottom 3a of the cleaning chamber 3. Cylindrical part 3j
A pipe 15 is fixed to an outer peripheral surface of the pipe by a fitting 18. The cylindrical portion 3j is formed with a mounting hole 3k formed of an inner peripheral surface and into which the support shaft 6 is fitted, and an annular convex portion 3d is formed at a peripheral edge of an upper end of the mounting hole 3k. This annular convex portion 3d
The mounting portion 3e described above is formed at the top of the arm 5 and contacts the contact portion 52e of the lower surface portion 52 of the arm 5.

The mounting hole 3k has a first peripheral surface 3f formed at the center in the vertical direction and formed of a circumferential surface, and a first peripheral surface 3f above the first peripheral surface 3f and having a larger diameter than the first peripheral surface 3f. 2g 3g,
It has a step surface 3h formed between the second peripheral surface 3g and the first peripheral surface 3f, and a locking recess 3i at the lower end of the first peripheral surface 3f. The locking recesses 3i are formed at a plurality of positions in the circumferential direction, and are engaged with the locking claws 6i of the support shaft 6.

The support shaft 6 has a lower portion fixed to the mounting hole 3k, a middle portion facing the water channel inside the arm 5, and an upper portion fitted into the upper surface portion 51 of the arm 5. The upper and middle portions of the support shaft 6 are inserted into the arm 5. The support shaft 6 has a partition member 6a for vertically partitioning the inside near the middle and upper boundaries. The inside of the support shaft 6 below the partition member 6a is a water passage for passing water, and an opening 6c for communicating with the pipe 15 is formed at the lower end. An opening 6b is formed in the middle peripheral surface of the support shaft 6 to allow water flowing below the partition member 6a to flow radially outward.

The lower peripheral surface of the support shaft 6 has a first peripheral surface 6f from below and a second peripheral surface 6g adjacent to the first peripheral surface 6f.
Is formed. Also,
In the middle and upper portions of the support shaft 6, a third peripheral surface 6m adjacent to the flange 6d, a fourth peripheral surface 6n provided with the third peripheral surface 6m and the opening 6b interposed therebetween, and an upper end of the fourth peripheral surface 6n An annular mounting portion 6o extending radially inward from the portion and a fifth peripheral surface 6p extending upward from an inner peripheral edge of the mounting portion 6o are formed. A sixth peripheral surface 6q extending upward from the outer peripheral edge of the upper surface of the partition member 6a is formed inside the fifth peripheral surface 6p. The upper surface 51 of the arm 5 is mounted on the mounting portion 6o. In addition, the first peripheral surface 6f to the sixth peripheral surface 6q
Are formed concentrically.

The first peripheral surface 6f of the support shaft 6 fits with the first peripheral surface 3f of the mounting hole 3k in a state where a gap is substantially removed.
The upper end of a tongue piece 6j extending downward is connected to the first peripheral surface 6f, and a hook-shaped locking claw 6i projects radially outward from the lower end of the tongue piece 6j. Since the lower end portion of the tongue piece 6j is configured to be elastically deformable in the radial direction, when the support shaft 6 is fitted into the mounting hole 3k from above, the locking claw 6i is elastically deformed inward, so that it does not interfere. Instead, it is fitted to the inside of the mounting hole 3k and enters into the locking recess 3i of the mounting hole 3k by elastic force. Utilizing this elastic force, the locking claw 6i and the locking recess 3i are securely locked.

The second peripheral surface 6g of the flange 6d has a larger diameter than the first peripheral surface 6f. The second peripheral surface 6g is fitted with the second peripheral surface 3g of the mounting hole 3k, and positions the support shaft 6 without rattling in the horizontal direction. The lower surface 6h of the flange 6d abuts on the step surface 3h of the mounting hole 3k to position the support shaft 6 in the vertical direction. The opening 6b has a flange 6
It is formed facing the inside of the arm 5 above d and is provided at a plurality of locations in the circumferential direction. The lower surface 6t of the partition member 6a is connected to the upper edge of the opening 6b.

The partitioning member 6a has a conical shape, and its outer portion is located higher than its inner portion.
At the center of the partition member 6a, there is formed a communication hole 6u communicating the upper part and the lower part of the partition member 6a, and the upper surface 6s of the partition member 6a is inclined downward toward the communication hole 6u so that water does not collect. are doing. The lower surface 6t of the partition member 6a is
It is formed substantially parallel to the upper surface 6s, while receiving the water pressure flowing downward, the inclined surface changes the direction of the water flow from above to the horizontal direction, smoothly guides the water to the opening 6b, and allows the water to flow into the arm 5. . Thus, the partition member 6a
It is a pressure receiving member that receives the downward water pressure, and is also a guide member that guides water.

The lower surface 52 of the arm 5 has the above-mentioned hole 5b at the center thereof. The hole 5b is formed inside an inner peripheral surface 52m extending in the vertical direction. Inner peripheral surface 52
m faces the third peripheral surface 6 m of the support shaft 6. Also,
An annular contact portion 52e protruding downward is formed at the peripheral edge of the inner peripheral surface 52m, and the mounting portion 3e on the bottom 3a of the cleaning chamber 3 is formed.
Is in contact with

The upper surface part 51 of the arm 5 has the following parts surrounding the upper part of the support shaft 6. That is, an inner cylindrical portion 51b surrounding above the communication hole 6u of the partition member 6a of the support shaft 6, a top surface portion 51c horizontally extending radially outward from an upper end of the inner cylindrical portion 51b, and a top surface portion. An outer cylindrical portion 51d extending downward from the peripheral edge of 51c is provided. The outer cylinder portion 51d has a lower end portion having a relatively large diameter, and has a relatively small diameter upper inner peripheral surface 51p, a relatively large diameter lower inner peripheral surface 51n, and an upper inner peripheral surface 51p. And an annular contact portion 51o that connects the lower inner peripheral surface 51n with the lower inner peripheral surface 51n. Each of these parts forms a concave part that opens downward inside the arm 5, and the upper part of the support shaft 6 is fitted into this concave part.

The contact part 51o of the outer cylinder part 51d is
Is in contact with the mounting portion 6o. Except for the two surfaces abutting, the concave portion of the upper surface portion 51 and the upper portion of the support shaft 6
A gap is provided between the surfaces. The lower inner peripheral surface 51n faces the fourth peripheral surface 6n of the support shaft 6, and the upper inner peripheral surface 51p faces the fifth peripheral surface 6p of the support shaft 6. The outer peripheral surface 51q of the inner cylindrical portion 51b is formed in a tapered shape with a lower portion having a small diameter, and faces the sixth peripheral surface 6q of the support shaft 6.

The opposing peripheral surfaces, ie, the inner peripheral surface 52m of the lower surface 52 of the arm 5, the third peripheral surface 6m of the support shaft 6, the lower inner peripheral surface 51n of the upper surface 51 of the arm 5, and The fourth peripheral surface 6n of the support shaft 6, the upper inner peripheral surface 51p, the fifth peripheral surface 6p of the support shaft 6, the outer peripheral surface 51q of the inner cylindrical portion 51b of the upper surface portion 51, and the sixth peripheral surface 6q of the support shaft 6 , Respectively, constitute a pair of fitting surfaces that fit each other.

A predetermined gap S is provided between each of the pair of fitting surfaces. This gap S is easy to fit,
The arm 5 is rotatably supported on the support shaft 6 when fitted, and is set such that water can pass through the gap. In addition, the fitting length of the pair of fitting surfaces along the vertical direction is set to a predetermined value. Here, the fitting length of the pair of fitting surfaces is a relative moving distance when the respective fitting surfaces are relatively moved from the fitted state to the released state. For example, the outer peripheral surface 51q of the inner cylindrical portion 51b of the upper surface portion 51
And the fitting length L1 of the sixth peripheral surface 6q of the support shaft 6 is longer than the distance L2 between the top surface 51c of the arm 5 and the lower surface 4a of the tableware basket 4 when measured in the vertical direction (L1>). L2)
Is set. Also, the upper inner peripheral surface 51p of the upper surface portion 51
Similarly, the fitting length L3 of the fifth peripheral surface 6p of the support shaft 6 is set to L3> L2.

As shown in the plan view of FIG. 3, a plurality of, for example,
Five pressure relief holes 51f and 51g are formed. These pressure release holes 51f and 51g are for passing the cleaning water passing through the communication hole 6u and the gap S described above, and releasing the upward water pressure caused by the cleaning water. Pressure release hole 51f
Is located immediately above the communication hole 6u and formed inside the inner cylindrical portion 51b. The depressurizing hole 51f has an inclined surface in which the diameter of the upper portion (the size DC in FIG. 2) serving as the outlet is larger than the diameter of the lower portion (the size DB in FIG. 2) (DC).
> DB). The lower end of the pressure release hole 51f has an elliptical shape in plan view. Oval small diameter (dimension D in FIG. 2)
B) is formed (DB> DA) larger than the diameter (dimension DA in FIG. 2) of the communication hole 6u. In addition, the pressure release hole 5
The lower end of 1f approaches the communication hole 6u. As a result, the water from the communication hole 6u can easily enter the pressure release hole 51f and can hardly enter the above-described gap S.
Can be suppressed from being applied to the top surface 51c.

The pressure release hole 51g is provided with a pressure release hole 51f.
Are formed on the top surface portion 51c. Each depressurizing hole 51g is located above the gap S and is formed in a circular shape. The diameter (the dimension DE in FIG. 2) of each pressure release hole 51g is larger than the diameter DA of the communication hole 6u (D
E> DA). As a result, the foreign matter is
u, even if it passes through the gap S, it surely passes through the depressurizing hole 51g and can prevent the foreign matter from being clogged.

Next, the operation will be described. During the cleaning operation, the cleaning water is pumped upward by the cleaning pump 14 in the support shaft 6. Most of the washing water changes its flow direction by the partition member 6a, flows into the arm 5, and flows into each of the injection ports 5a.
Injected from a. In addition, a part of the washing water is supplied to the communication hole 6u.
From above through the pressure release hole 51f and squirts upward including an oblique direction. Another part of the washing water is blown upward from the communication hole 6u through the gap S and the pressure release hole 51g.

By the way, in this embodiment, since the arm 5 is only mounted on the bottom 3a of the cleaning chamber 3,
It is worried that the arm 5 may come off due to the water pressure from the washing pump 14, but this is not the case. This is because the water pressure acts upward on the partition member 6a of the support shaft 6, but since the support shaft 6 is fixed to the bottom 3a of the cleaning chamber 3, the support shaft 6 does not come off. In addition, since the water pressure acts equally in all directions in the arm 5, there is no possibility that the arm 5 will come off upward. Further, when the washing water is jetted upward from the jet port 5a, the reaction force of the jet acts on the arm 5 downward, so that the arm 5 is pressed and stably supported.

At the start of cleaning, since the above-mentioned reaction force of the injection does not act, it is assumed that the arm 5 is easily pulled upward. There is no problem even in this state. I mean,
Even if water enters above the partition member 6a, the water pressure is weakened by the depressurizing holes 51f and 51g, and even if the arm 5 is pushed up, it hits the lower surface 4a of the tableware basket 4 and comes off. Never.

As described above, according to the mounting structure C of the present embodiment, the support shaft 6 is inserted into the hole 5b of the arm 5, and the arm 5 is mounted on the mounting portion 3e or the mounting portion 6o on the bottom 3a. And the arm 5 is positioned in the horizontal direction and the injection port 5a
Can be sprayed with water. Since the arm 5 is only placed on the bottom 3a, it can be easily removed and the cleaning time can be reduced.

Further, since a simple structure for mounting is sufficient, a structure for retaining the structure can be omitted. As a result, the number of parts can be reduced and the structure can be simplified. For example, a nut for preventing the arm from coming off is conventionally provided, but is omitted in the present embodiment. In addition, at the time of assembling, only the arm 5 needs to be mounted, so that there is no need for assembling.
Manufacturing costs can be reduced.

A partition member 6a as a pressure receiving member is mounted on the support shaft 6.
Is provided, the water pressure applied upward to the inside of the support shaft 6 can be received by the bottom 3 a of the cleaning chamber 3 via the support shaft 6. As a result, the arm 5 can be prevented from coming off. Furthermore, even if an upward water pressure is applied to the arm 5 above the partition member 6a, the water pressure is released through the pressure release holes 51f and 51g, so that the arm 5 can be reliably prevented from coming off. Here, the pressure receiving member is not limited to the member that receives the water pressure, but may be any member that applies an upward water pressure, and this member may have a function of guiding water or the like.

Further, since the pressure release holes 51f and 51g are located behind the partition member 6a, it is possible to alleviate the water pressure acting in the direction in which the arm 5 comes off while preventing a decrease in the water pressure sent into the arm 5. Further, in addition to the water from each injection port 5a, the detergency can be enhanced by the water blown out from the pressure release holes 51f and 51g.

Due to the inclined surface of the lower surface of the partition member 6a, which is inclined upward toward the peripheral edge, water can be smoothly sent to the injection port 5a of the arm 5 during washing, and washing can be performed efficiently. In addition, it is assumed that water at the time of washing accumulates on the partition member 6a. However, such accumulated water can be drained downward through the communication hole 6u when the operation is stopped, so that water is deposited on the upper surface 6s of the partition member 6a. Accumulation can be prevented. As a result, there is no possibility that an unusual odor due to the accumulated water is generated.

Further, since each of the pressure relief holes 51f and 51g is larger than the communication hole 6u (dimension DB> dimension DA, dimension DE> dimension DA in FIG. 2), the communication hole 6u may be contaminated by foreign matter such as dust or dirt. Even if the gas passes through the holes 51f and 51g, the clogging of foreign matter can be prevented. In the case where the above-mentioned pair of fitting surfaces are provided near the upper end of the support shaft 6, it is only necessary to fit the arm 5 at the end when the arm 5 is mounted, and the work is easy. Further, when there is a gap between the pair of fitting surfaces, the fitting is easy, and the work is further facilitated.

In particular, since the pressure relief hole 51g is provided above the gap S between the fitting surfaces, even if water passes through the gap S during washing, the water pressure applied to the arm 5 is reduced, and as a result, the arm 5 Can be more reliably prevented from coming off. Further, even if foreign matter in the water enters the gap S during the cleaning, the foreign matter is discharged from the gap S through the pressure release hole 51g, so that the foreign matter can be prevented from clogging the gap S. As a result, there is no possibility that the rotation of the arm 5 is hindered.

In addition, if the pressure release hole 51f has a slope, water can be blown out while spreading in a diagonal direction along the slope. As a result, the water can be blown out over a wide range with the rotation of the arm 5. As compared with the case where water is blown out just above, the cleaning ability can be increased. Further, since the outlet of the pressure release hole 51f is made wider than the inlet (the dimension DC> dimension DB in FIG. 2), the foreign matter can smoothly pass through the pressure relief hole 51f, so that the foreign matter can be prevented from being clogged.

The distance (dimension L5 in FIG. 2) at which the support shaft 6 enters the hole 5b of the arm 5 is determined by the lower surface 4c of the tableware basket 4.
And a distance L2 between the top surface 51c of the upper surface 51 of the arm 5 and the top surface 51c. Thereby, even if the arm 5 is lifted by water pressure, the lifting amount is regulated by hitting the lower surface 4a of the tableware basket 4, and the arm 5 is more reliably prevented from coming off. Can be.

Further, if the fitting lengths L1 and L3 of the pair of fitting surfaces near the upper end of the support shaft 6 are set longer than the above-mentioned distance L2, the arm 5 should be Since the fitting can be maintained when lifted and hit against the lower surface 4a of the tableware basket 4, when the reaction force of the water jet pushes the arm 5 downward, the arm 5 autonomously returns to the original state. As a result, cleaning can be performed without any trouble.

Here, in order to return the arm 5 to the original state, it is preferable that the arm 5 does not incline when pushed up. Therefore, the arm 5 has a fitting length between a pair of fitting surfaces near the upper end of the support shaft 6. And the shortest fitting length, for example, fitting length L
3 is preferably longer than the interval L2 described above. Also,
Since the support shaft 6 and the arm 5 are fitted at a plurality of positions which are separated from each other in the axial direction, the arm 5 is easily kept horizontal and easily returned to the original state.

By the way, as shown in FIGS. 4 and 5, the case 22 on the front of the dishwasher 1
Structural member 2 of cabinet 2 via opening / closing mechanism 27
6 attached. The case 22 is formed in a box shape opened rearward. That is, case 22
Is a front surface portion 22a on which an operation panel is provided, and an upper surface portion 22 extending rearward from a peripheral portion of the front surface portion 22a.
b, a lower surface portion 22c, a left side surface portion 22d (see FIG. 6), and a right side surface portion 22e, which are integrally formed of a resin material. The fixing of the case 22 is performed as follows. A mounting plate portion 22f substantially parallel to the upper surface portion 22b is integrally formed at a corner between the front surface portion 22a and the left and right side surface portions 22d and 22e of the case 22 on the back surface side of the case 22. The mounting plate portion 22f is connected to the upper surface portion 22b.
Are provided in a pair on the left and right below a predetermined distance from each other, and each has a locking hole 22g. The locking hole 22g is fitted in a hooking projection 73g of the support member 73 of the opening / closing mechanism 27. Further, an insertion hole 22h is formed in the lower surface portion 22c of the case 22, and a screw 28 is passed through the insertion hole 22h. The screw 28 is used for the bottom structural material 2 of the cabinet 2.
6 is screwed into a female screw hole formed at the front end, and the lower surface 22 c of the case 22 is fixed to the bottom structural member 26.

As described above, since the locking hole 22g for locking the case 22 is provided below the upper surface portion 22b, it is not necessary to open the locking hole in the upper surface portion 22b. Of the circuit board 24 and the like inside the case 22 can be reliably prevented from being splashed with water. Therefore, the waterproof structure such as the circuit board 24 can be simplified.

In addition, if the upper surface portion 22b has no hole, the case 22 can be made to look good. In particular, when the upper surface portion 22b and the mounting plate portion 22f are provided separately, the upper surface portion 2b
This is preferable for resin molding because the thickness of 2b does not need to be increased. In addition, in the conventional case, since the locking hole is opened in the upper surface portion, there is a risk that water dripping from the opening / closing door through the locking hole may enter the inside of the case.

Further, since the locking hole 22g is arranged inside the case 22, the length of hooking with the hooking projection 73g can be increased without obstructing the opening / closing door 21, so that the case 22 is securely locked. can do. In addition, in the conventional case, since the locking hole was provided on the upper surface, the hooking length was also suppressed so that the hooking projection fitted in the locking hole would not catch on the opening / closing door.

The opening / closing mechanism 27 is attached to the opening / closing door 21 via mounting brackets 71 and 74, and is provided with a pivoting center shaft 72 extending in the left-right direction. It has a helical spring 75 that biases the valve 21 to close it, and a support member 73 that rotatably supports the rotation center shaft 72 while engaging with the rotation center shaft 72. These components are provided as a pair on the left and right sides of the door 21. Support member 73
A plurality of screws 76 are provided on the outer side surfaces of the support pillars erected on the left and right sides of the bottom structural member 26 of the cabinet 2 near the front.
(Only a part is shown) is screwed into the female screw hole 26j to be fixed.

The support member 73 includes a plate-shaped main portion 73a,
A shaft holding portion 73b at the front end of the main body portion 73a for rotatably holding the rotation center shaft 72, a hook engaging portion 73c to which one end 75a of the helical spring 75 is hooked, and a bent portion at the top of the main body portion 73a. Mounting fitting 74
Locking portion 73d abutting on the end portion 74a of the bottom structure member 2
6, a plurality of screws 76 through holes 73e for fixing to
A hook projection 73g fitted into the locking hole 22g of the case 22 is provided. The main body 73a is formed of the bottom structural material 26.
When the opening and closing door 21 is opened and closed in this state, the end 74a of the mounting bracket 74 is displaced along the surface of the support member 73 and comes into contact with the locking portion 73d in the opened state of the opening and closing door 21. The open state can be stably maintained. Also,
In the open state, the restoring force of the helix spring 75 is
And the opening / closing door 21 can be easily closed.

A plurality of hook engaging portions 73c, for example,
The hook engaging portions 73c are provided at two places and are arranged in the vertical direction. This is for changing the helix spring 75 to a different one. Because the door 2
If the weight of the first spring is different, the specification of the helix spring 75,
This is because, for example, the resilient force may be changed by changing to a helical spring 75 having a different number of turns, a different length of the end portion 75a, and the like. As described above, the plurality of hook engagement portions 73
Since c is provided, a single support member 73 can correspond to a plurality of different helical springs 75.

A cover 29 for covering the circuit board 24 disposed here is fixed to the back side of the case 22. As shown in the rear view of FIG.
A wire stopper 29b for fixing a wire bundle 24a in which a number of lead wires extending from the circuit board 24 are bundled is provided. The wire rod stopper 29b is formed of a resin that can be elastically deformed integrally with the side surface 29a of the cover 29. The wire rod stopper 29b includes a main plate portion 29c for holding the wire bundle 24a between the main plate portion 29c and the side surface 29a of the cover 29.
c has a pair of legs 29d and 29e extending from both ends to the side surface 29a of the cover 29. One leg 29d
Connects one end of the main plate portion 29c and the side surface 29a. One end of the other leg 29e is connected to the other end of the main plate 29c, and the leg 29 near the side surface 29a of the cover 29.
A hook 29f is formed at the other end of e. The hook portion 29g that can be engaged with the hook portion 29f is formed on the side surface 2 of the cover 29.
9a. Each part is integrally formed with the pair of hooks 29f and 29g separated (this state is shown by a dashed line). In addition, the wire rod stopper 29b is elastically deformed to engage the pair of hooks 29f and 29g, whereby the pair of legs 29d and 29e and the main plate 29c are engaged.
The wire bundle 24a is housed in the interior surrounded by the side wall 29a and the wire bundle 24a, and the wire bundle 24a can be securely held between the main plate portion 29c and the side surface 29a (this state is shown in FIG. 6). Is shown in the figure).

In particular, the main plate portion 29c of the present embodiment is
It is composed of two inclined portions 29h and 29i, and these portions 29h and 29i are connected at the center of the main plate portion 29c. The main plate portion 29c has a central portion projecting toward the side surface 29a of the cover 29, and each portion 29h, 29i.
Are formed so as to be more distant from the side surface 29a of the cover 29 as they go from the portions connected to each other to the leg portions 29d and 29e. The wire stopper 29b is formed in a substantially M-shape as a whole.

With the wire stopper 29b having this shape, the fixed height L4 of the wire bundle 24a (the distance between the side surface 29a of the cover 29 and the portion of the wire bundle 24a opposite to the side surface 29a) can be suppressed. it can. Because the bundle 2
When 4a is clamped, the central portion of the main body plate portion 29c is pushed in the opposite clamping direction. At this time, if the main body plate 2
Even if the central portion of 9c is extruded, the central portion of the main plate portion 29c is recessed in the anti-clamping direction.
Projection in the anti-clamping direction is prevented as compared with the portions closer to 9d and 29e. Further, since the central portion of the main plate portion 29c protrudes toward the side surface 29a of the cover 29, the wire bundle 24a is more easily accommodated closer to the legs 29d and 29e than the central portion, and as a result, the central portion of the main plate portion 29c is formed. , Can be reduced. When the top of the V-shape is pressed so as to straighten the shape, the substantially V-shaped main plate portion 29c is more flexible than the straight plate-shaped one while the shape is maintained. Because it becomes difficult.

As described above, since the fixing height of the wire bundle 24a can be suppressed, the space required for fixing the wire bundle 24a can be reduced. As a result, for example, the circuit board 2
Since the space for arranging the four or the like can be increased, the number of circuit boards 24 conventionally required two can be reduced to one, the number of components can be reduced, and the structure can be simplified.

In the conventional wire rod stopper, the main plate portion is formed in a flat plate shape or in an arc shape that protrudes in the anti-clamping direction. In this case, when pinching a large number of wires, the wires push the main plate portion in the anti-clamping direction, and the fixing height of the wire bundle tends to be large, and a large space for fixing is required. Was. In the above-described embodiment, the mounting portion 3e of the convex portion 3c and the mounting portion 6o of the support shaft 6 are provided in the cleaning chamber 3. However, in order to mount the arm 5, , At least one of them is sufficient. Also, the arm 5
It may be placed via a member provided on the bottom 3 a of the cleaning chamber 3 other than the support shaft 6.

In addition, various design changes can be made without changing the gist of the present invention.

[0064]

According to the first aspect of the present invention, since the arm is placed on the bottom of the cleaning chamber, it can be easily removed and the cleaning work can be reduced. In addition, the structure can be simplified with a small number of parts, the assembling does not take time, and the manufacturing cost can be reduced. According to the second aspect of the present invention, since the pressure receiving member and the pressure release hole above the pressure receiving member are provided, it is possible to reliably prevent the arm from coming off. In addition, the detergency can be enhanced by the water blown out from the pressure release hole.

According to the third aspect of the present invention, the inclined surface of the pressure receiving member allows the water to be smoothly sent to the injection port, thereby enabling efficient cleaning. Further, water accumulated on the pressure receiving member can be drained through the communication hole when the operation is stopped.
Further, since the pressure release hole is made larger than the communication hole, it is possible to prevent foreign matter from being clogged. According to the fourth aspect of the invention, if the vicinity of the upper end of the shaft is fitted, it is easy to fit the arm when placing it. Further, since the pressure release hole is provided above the gap, the detachment of the arm can be more reliably prevented, and foreign matter can be prevented from being clogged in the gap.

According to the fifth aspect of the present invention, a depressurizing hole having a slope can increase the detergency of water from the depressurizing hole, and the depressurizing hole having a wide outlet allows clogging of foreign matter. Can be prevented. According to the sixth aspect of the present invention, since the shaft is inserted into the hole of the arm at a distance longer than the distance between the upper surface of the arm and the lower surface of the tableware basket, the arm can be more reliably prevented from coming off.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a schematic configuration of a dishwasher according to an embodiment of the present invention.

FIG. 2 is a side cross-sectional view of the arm mounting structure of the dishwasher shown in FIG.

FIG. 3 is a plan view of a central portion of the arm shown in FIG. 2;

FIG. 4 is a side sectional view showing the vicinity of an opening / closing door of the dishwasher shown in FIG. 1;

FIG. 5 is an exploded perspective view of the opening / closing mechanism shown in FIG.

FIG. 6 is a rear view of the case of the dishwasher shown in FIG. 1;

[Explanation of symbols]

 Reference Signs List 3 washing room 3a bottom of washing room 4 tableware basket 5 arm 5a injection port 5b hole 6 support shaft (shaft) 6a partition member (pressure receiving member) 6b, 6c opening 6p fifth circumferential surface (near upper end portion) 6q sixth circumference Surface (part near the upper end) 6t Lower surface (inclined surface) of partition member 6u Communication hole 51 Upper surface portion 51f, 51g Depressurizing hole C Mounting structure L2 Distance between lower surface of tableware basket and upper surface of arm S Gap

Claims (6)

[Claims] 1. An arm mounting structure for mounting an arm having an injection port for spraying water in a washing chamber of a dishwasher to a bottom of the washing chamber, wherein the bottom of the washing chamber has an upright shaft. An arm mounting structure, wherein the shaft is inserted into a hole formed in a lower surface of the arm, and the arm is detachably mounted on a bottom of the cleaning chamber. 2. The mounting structure of an arm according to claim 1, wherein the arm has a hollow structure through which water passes, and a shaft is formed in a cylindrical shape, into which water flows from the bottom of the washing chamber. A pressure receiving member that receives upward water pressure is provided above the opening to the inside of the arm, and a shaft is inserted into the hole of the arm. An arm mounting structure, wherein a pressure release hole is formed in a position above the pressure receiving member in the upper surface of the arm in a state where the arm is pressed. 3. The arm mounting structure according to claim 2, wherein the pressure receiving member is formed on a slope inclined upward from an inside of the shaft toward an opening into the arm, and a lowest portion of the slope. And a communication hole opened upward, and the pressure release hole is located at a position above the communication hole of the pressure receiving member,
An arm mounting structure characterized by being formed larger than the communication hole. 4. The mounting structure for an arm according to claim 2, wherein the upper surface of the arm is fitted with a portion near the upper end of the shaft with a gap therebetween, and the pressure release hole is formed directly above the gap. An arm mounting structure characterized by being provided at a position. 5. The arm mounting structure according to claim 2, wherein the pressure release hole includes a slope having a wide exit side. 6. An arm mounting structure according to claim 1, wherein an arm mounted on a bottom of said cleaning chamber is provided above said arm.
A dish basket is arranged, a predetermined gap is provided between the lower surface of the dish basket and the upper surface of the arm, and the shaft is inserted into the hole of the arm at a distance longer than the predetermined interval. Arm mounting structure.