JPH09238886A - Dish washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent water leakage from the vicinity of a sliding part of a washing nozzle rotated round the horizontal longitudinal direction by forming a water guide port communicated with a water feed port on the outer peripheral surface of a washing nozzle wrapped in a nozzle insert hole formed on a water supplying pipe, and providing an annular seal member in a clearance between the water supply pipe and the washing nozzle. SOLUTION: In a dish washing machine where the central part of a long washing nozzle is covered with a water supply pipe 8 and the right and left end parts are supported by shafts projected from the right and left side walls of a washing vessel, a bracket 20 for supplying washing water to the long washing nozzle at the tip of a hollow coupling 19 is welded to a water supply pipe 8, a water feed port 24 which has nozzle insert holes 23 on both sides and is communicated with the nozzle insert holes 23 is opened in the nozzle insert part of the bracket 20, and a water guide groove 25 is formed in the periphery of the nozzle insert hole 23. A sliding ring 32 as an annular seal member is interposed between the water supply pipe 8 and the right and left flanges 29 of the nozzle main body 27, and the contact surface 35 is always lightly pressed to the flanges 29 by coil springs 36 interposed in the respective clearances.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher in which a horizontally supported washing nozzle rotates about its longitudinal axis.

[0002]

2. Description of the Related Art Conventional dishwashers are generally of a type in which a washing nozzle rotates in a horizontal plane. However, in recent years, in order to put the dishwasher on the sink and use it, there is an increasing demand for downsizing of the dishwasher, and as a means for achieving this, as disclosed in JP-A-2-82931,
There is a thin cleaning tank in which the cleaning nozzle is rotated about its longitudinal direction.

[0003]

However, in that case, water leakage occurs from the gap between the cleaning nozzle and the nozzle shaft, which eventually reduces the amount of cleaning water sprayed from the cleaning nozzle, which lowers the cleaning power. There was a problem. Therefore, in view of the above points, an object of the present invention is to prevent water leakage from the vicinity of a sliding portion of a cleaning nozzle that rotates around a horizontal longitudinal direction.

[0004]

According to a first aspect of the present invention, there is provided a cylindrical cleaning nozzle which has a plurality of injection ports on an outer peripheral surface and which injects cleaning water from the injection ports while rotating about the longitudinal direction of the injection ports. A dishwasher having a water supply pipe having a nozzle insertion hole in which a water supply port to the cleaning nozzle is opened, and the cleaning nozzle is horizontally arranged by inserting the cleaning nozzle into the nozzle insertion hole of the water supply pipe, A water guide port communicating with the water supply port is formed on the outer peripheral surface of the cleaning nozzle surrounded by the insertion hole, and an annular seal member is provided in a gap between the water supply pipe and the cleaning nozzle. Therefore, water leakage from the gap between the water supply pipe and the cleaning nozzle can be prevented.

According to a second aspect of the present invention, in the first aspect, both longitudinal ends of the cleaning nozzle are rotatably supported by shafts or bearings provided inside the cleaning tank. In this case, since both ends in the longitudinal direction are supported, stable rotation can be obtained.

According to a third aspect of the present invention, in the first or second aspect, the outer peripheral surface of the cleaning nozzle has a sliding surface that is perpendicular to the rotation axis of the cleaning nozzle and faces the side surface of the water supply pipe, and the water guide port is sandwiched between the sliding surfaces. And an annular seal member is interposed between the sliding surface and the water supply pipe, and a contact portion between the sliding surface and the annular seal member is a rotary sealing surface. In this case, since the rotary seal surface is in the vertical direction and the load of the cleaning nozzle and the water supply pipe is not applied to the rotary seal surface, uneven wear of the seal surface is prevented.

According to a fourth aspect of the present invention, in the third aspect, the water seal pipe side of the annular seal member is inserted between the inner peripheral surface of the nozzle insertion hole of the water pipe and the outer peripheral surface of the cleaning nozzle. The outer peripheral surface is provided with a fitting portion that closely adheres to the inner peripheral surface of the nozzle insertion hole, and the elastic body is housed in the nozzle insertion hole of the water supply pipe. It is characterized in that it is pressed in the surface direction. In this case, the annular seal member is movable along the inner peripheral surface of the water supply pipe, and the annular seal member is always in close contact with the sliding surface of the cleaning nozzle for sealing. A coil spring or a leaf spring can be used as the elastic body. The elastic body is
It can be sandwiched between the annular seal members, or can be sandwiched between the water supply pipe and the annular seal member.

According to a fifth aspect of the present invention, in the fourth aspect, the outer end portion of the annular seal member has a larger diameter than the inner circumference of the nozzle insertion hole of the water supply pipe. In this case, when the cleaning nozzle is laterally shaken by the jetting force of the cleaning water, the outer end of the large-diameter annular seal member is sandwiched between the water supply pipe and the cleaning nozzle.

According to a sixth aspect of the present invention, in the fourth aspect, the fitting portion of the annular seal member is R-shaped. In this case, even if the water supply pipe and the shaft of the cleaning nozzle are twisted, the R shape of the annular seal member follows the inner peripheral surface of the nozzle insertion hole of the water supply pipe to maintain the close contact state.

According to a seventh aspect of the present invention, in the third or fourth aspect, the annular seal member is composed of an inner ring having a fitting portion for the water pipe and an outer ring having a rotary sealing surface for the sliding surface. The contact surface between the inner ring and the outer ring is formed in a spherical shape, and the contact surface is kept watertight even when the outer ring is inclined with respect to the inner ring. In this case, even if the axis of the water supply pipe and the axis of the cleaning nozzle are twisted, only the relative angle between the inner ring and the outer ring changes, and the position and relative angle between the inner ring and the water supply pipe do not change.

The invention of claim 8 is characterized in that, in claim 3, the annular seal member is a bellows. In this case, even if the water supply pipe and the shaft of the cleaning nozzle are twisted, the rotating seal surface follows the sliding surface of the cleaning nozzle due to the deformation of the bellows.

According to a ninth aspect of the present invention, in the third aspect, the annular seal member comprises an annular packing and one or a plurality of annular rings, and the outer peripheral surface of the annular packing is the inner peripheral surface of the water pipe. The ring ring is placed between the sliding surface of the cleaning nozzle and the outer end surface of the annular packing so that they are in close contact with each other, and the contact surface between the ring ring and the sliding surface of the cleaning nozzle or the contact surface between multiple annular rings Is a rotary seal surface. In this case, the annular packing always brings the annular ring into close contact with the sliding surface of the cleaning nozzle for sealing.

According to a tenth aspect of the present invention, in the first or second aspect, sliding surfaces perpendicular to the rotation axis of the cleaning nozzle are formed on both sides of the water supply pipe, and an annular shape is provided between the sliding surface and the cleaning nozzle. A seal member is interposed, and a contact portion between the sliding surface and the annular seal member is a rotary seal surface. In this case, since the rotary seal surface is in the vertical direction and the load of the cleaning nozzle and the water supply pipe is not applied to the rotary seal surface, uneven wear of the seal surface is prevented.

The invention of claim 11 is characterized in that the cleaning nozzle is rotatably held by the water supply pipe with the annular seal member interposed therebetween.

The invention of claim 12 is characterized in that a water guiding groove surrounding the water guiding port of the cleaning nozzle is formed in the nozzle insertion hole of the water feeding pipe. In this case, since the cleaning water is introduced from substantially the entire circumference of the cleaning nozzle, the amount of water supplied to the cleaning nozzle can be increased.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to the drawings. The dishwasher 1 incorporates a washing tank 3 inside the exterior 2 and is provided with two doors 4 on the front surface, and the table baskets 5 in the upper and lower two stages can be freely placed in and taken out from the washing tank 3. A long cleaning nozzle 6 which is horizontally arranged and rotates about the longitudinal direction is arranged between the upper and lower tableware baskets 5.
Two flat surface rotation cleaning nozzles 7 are arranged on the left and right below.

On the upper part of the rear wall of the cleaning tank 3, a water supply pipe 8 for supplying cleaning water to the long cleaning nozzle 6 and a water outlet 9 are provided at substantially the same height. The long cleaning nozzle 6 has a water pipe 8 at the center.
And the left and right ends thereof are supported by shafts 10 and 11 projecting from the left and right side walls of the washing tank 3, and rotate by the jet reaction force of the washing water. The right shaft 11 has one end mechanically connected to the long cleaning nozzle 6 and the other end connected to a shaft of a motor 12 rotating at a lower speed than the rotation speed of the long cleaning nozzle 6 to form a long cleaning nozzle. The rotation of 6 is maintained at a low speed.

Further, the lower half of the center of the lower portion of the cleaning tank 3 is largely bulged upward, and the nozzle shaft 13 of the plane rotary cleaning nozzle 7 is provided there. Further, a circulation pump 14 that circulates cleaning water to the cleaning nozzle is housed below the raised portion. The cleaning water delivered from the circulation pump 14 is supplied to the lower end of the base of a water conduit (not shown) built in the lower part of the cleaning tank 3, and then the flat rotary cleaning nozzle 7 is introduced from the tip of the water conduit.
Is supplied to the nozzle shaft 13 of each of the cleaning nozzles 6, and is also supplied to the water pipe 8 of the long cleaning nozzle 6 through the vertical water conduit 15 which is erected upward from the upper end of the base of the water conduit.
Reach 7.

A concave portion is formed on the front side of the bottom of the cleaning tank 3, and the residual food filter 16 and the residual food basket 17 cover the concave portion. A water level detection chamber (not shown) having two float switches for normal water level detection and overflow water level detection is formed integrally with the cleaning tank 3 outside the left side surface of the cleaning tank 3. It connects with the above-mentioned concave part with a hose.

On the front side of the cleaning tank 3, a horizontal rail 18 is attached on the back side of the adjacent side of the upper door 4 and the lower door 4 and at substantially the same height as the long cleaning nozzle 6.

The long cleaning nozzle 6 and the water supply pipe 8 will be described in detail below. The water pipe 8 is, as shown in FIG.
A bracket 20 for supplying cleaning water to the long cleaning nozzle 6 is welded to the tip of the hollow joint 19, and the base end of the joint 19 is connected to the vertical water pipe 15 by a union nut 21.

The bracket 20 has a nozzle insertion portion on the front end side through which the long cleaning nozzle 6 can be inserted. The nozzle insertion portion has nozzle insertion holes 23 on both sides, forms a water supply port 24 communicating with the nozzle insertion hole 23, and forms a water guide groove 25 around the nozzle insertion hole 23. The cleaning water passes through the joint 19 from the vertical conduit 15 to the conduit 25 of the bracket 20, and is introduced into the nozzle from a conduit 26 formed around a long cleaning nozzle 6 described later.

As shown in FIGS. 7 and 8, the long cleaning nozzle 6 has a nozzle body 27 formed in a cylindrical shape with a diameter decreasing toward the end, and eight jets mounted around the nozzle body 27. The mouth 28 is provided, and the wash water is jetted from the jet port 28. On the central peripheral wall of the nozzle body 27, four water guide ports 26 that receive the supply of washing water from the water supply pipe 8 are opened, and on the left and right sides thereof are larger than the nozzle insertion holes 23 of the water supply pipe 8,
Tsuba 29 whose surfaces facing each other are vertical to the rotation axis.
Is formed. In the vicinity of the water inlet 26 of the nozzle body 27,
The diameter is formed so that a gap can be formed with respect to the inner circumference of the nozzle insertion hole 23 of the water supply pipe 8. Further, at the left end of the nozzle body 27, an engaging hole 30 that is engaged with the shaft 10 formed in the cleaning tank 3 and has a slightly larger diameter than the shaft 10 is formed, and at the right end, a shaft connected to the shaft of the motor 12. A hole 31 that is mechanically connected to 11 is formed. Therefore, the nozzle body 2
7 is a two-point support that is supported by the left and right shafts 10 and 11 of the cleaning tank 3 and is not directly supported by the water supply pipe 8. Instead of projecting the left and right shafts 10 and 11 from the cleaning tank, bearings may be formed in the cleaning tank 3 and the shafts may be projectingly formed on the long cleaning nozzle 6 side.

Further, in this embodiment, the nozzle body 2
Reference numeral 7 is composed of a right side nozzle body 27a and a left side nozzle body 27b which are divided in two between the left side collar 29 and the water guide port 26, and they are integrated by screw connection. Long cleaning nozzle 6
In assembling, the right side nozzle body 27a and the left side nozzle body 27b are respectively inserted from the left and right nozzle insertion holes 23 of the water supply pipe 8, and the water supply pipe 8 is sandwiched by the collar 29 to connect the nozzle main body 27. At that time, in order to prevent water leakage between the water supply pipe 8 and the nozzle body 27, an annular seal member is interposed therebetween.

Next, a seal structure (first embodiment) between the water supply pipe 8 and the long cleaning nozzle 6 will be described with reference to FIG. In this example, sliding rings 32 are interposed as annular seal members between the water supply pipe 8 and the left and right flanges 29 of the nozzle body 27. The sliding ring 32 has a short cylindrical shape having an outer diameter slightly smaller than the nozzle insertion hole 23 and an inner diameter larger than the nozzle body 27, and has an R-shaped outer surface having an outer diameter substantially equal to the inner diameter of the nozzle insertion hole 23. Mating part 3
3 is formed so as to project, the outer side (flange side) end portion 34 is formed to have a larger diameter than the nozzle insertion hole 23, and the flange side end surface 35 is provided with the collar 29.
The contact surface with The two sliding rings 32 are
Since the coil spring 36 is compressed and sandwiched between them, the contact surface 35 is always in a state of being lightly pressed against the collar 29.

Therefore, the sliding ring 32 constitutes a seal by the fitting portion 33 into the nozzle insertion hole 23 and the abutment surface 35 against the collar 29, and the nozzle insertion hole 23 and the fitting portion 3 are formed.
Since the diameters of 3 are substantially equal, the sliding ring 32 hardly rotates with respect to the water supply pipe 8, and the contact surface 35 serves as the rotary seal surface A of the sliding ring 32. That is, the surface of the collar 29 on the side of the water supply pipe 8 serves as the sliding surface 37 of the sliding ring 32. Further, since the nozzle insertion hole 23 and the fitting portion 33 have substantially the same diameter, the sliding surface pressure has a constant value that does not depend on the internal pressure of the long cleaning nozzle 6, and the sliding resistance torque is kept constant. A good seal is obtained. The fitting portion 33
Since the claw 38 is formed on the inner side of the coil spring and both ends of the coil spring 36 are hooked there, the coil spring 36 does not come off during the assembly work of the long cleaning nozzle 6, and the assembly work can be simplified.

As described above, the long cleaning nozzle 6 is rotated by the jet reaction force of the cleaning water.
Since the nozzle body 27 is supported by the points, a stable rotation operation can be obtained. Further, the nozzle body 27 has such a small diameter that a gap is formed between the nozzle body 27 and the sliding ring 32. Tolerate. That is, even when the rotational axis of the long cleaning nozzle 6 and the center line of the water supply pipe 8 are misaligned or the rotation of the long cleaning nozzle 6 is shaken, the nozzle body 27 slides. Only the vertical position of the ring 32 is displaced, and the rotation failure of the long cleaning nozzle 6 does not occur. Further, since the fitting portion 33 of the sliding ring 32 is R-shaped, the fitting portion 33 and the nozzle insertion hole 23 of the water supply pipe 8 can be kept in close contact with each other even if the nozzle body 27 is tilted in the left-right direction. Therefore, even if the long cleaning nozzle 6 is slightly inclined, it does not adversely affect the rotation performance and the sealing performance.

Since the outer end of the sliding ring 32 forms a predetermined gap with the left and right end surfaces of the water pipe 8,
The positions of the nozzle body 27 and the water supply pipe 8 can be displaced by the amount of the gap, and axial deviation of the nozzle body 27 can be allowed.

When the number of the ejection ports 28 is different between the left and right of the long cleaning nozzle 6 as in the present embodiment, the ejection force of the long cleaning nozzle 6 is shifted to the left or right, and the nozzle body 27 is displaced in the axial direction. In that case, since the outer end of the sliding ring 32 having a diameter larger than that of the nozzle insertion hole 23 is sandwiched between the water supply pipe 8 and the long cleaning nozzle 6, the water supply pipe 8 and the long cleaning nozzle 6 are directly connected to each other. Therefore, the rotational force of the long cleaning nozzle 6 does not drop without contacting the.

Further, the long cleaning nozzle 6 is the nozzle body 2
Since the nozzle body 27 forms a gap between the nozzle body 27 and the slide ring 32, the slide ring 32 hardly rotates with respect to the water supply pipe 8, and the long cleaning nozzle 6 is supported.
It rotates with respect to the sliding surface 37 of. Therefore, since only the rotary seal surface A that is vertical to the horizontal rotary shaft slides, the load of the long cleaning nozzle 6 is not applied to the rotary seal surface A that slides. Therefore, the rotary seal surface A is not worn down due to sliding friction, and a good seal with no gaps for a long period of time can be obtained. Further, since the rotary seal surface A is constantly pressed by the coil spring 36 against the sliding surface 37, a gap is generated between the contact surface 35 and the sliding surface 37 even if the rotary seal surface A is scraped by rotational friction. And the sealing performance does not deteriorate.

Next, another example (second embodiment) of the seal structure between the water supply pipe 8 and the nozzle body 27 will be described with reference to FIG. In this example, the water pipe 8 is used as the annular seal member.
A bellows 39 that is expandable in the left-right direction is interposed between the left and right ends of the and the flange 29 (sliding surface 37) of the nozzle body 27. The bellows 39 has a water pipe side end portion which is closely fitted and attached to the water pipe 8 to form a seal, and the flange side end surface abuts the sliding surface 37 to form a rotary seal surface A.

Also in this example, the same effect as that of the first embodiment of the seal structure can be obtained. Particularly, due to the expansion and contraction action of the bellows 39, the left and right positions of the nozzle body 27 and the water supply pipe 8 can be displaced, and the axial deviation of the nozzle body 27 can be allowed. Further, since the rotary seal surface A is constantly pressed against the sliding surface 37 by the expansion and contraction action of the bellows 39, even if the rotary seal surface A is scraped by the rotational friction, a gap is generated between the sliding surface 37 and the bellows 39. The sealing performance does not deteriorate.

Next, a third seal structure example will be described with reference to FIG. In this example, the annular seal member is a fitting portion 41 to the inner surface of the nozzle insertion hole 23 of the water supply pipe 8.
And an outer ring 44 that is installed in contact with the flange side of the inner ring 42 and that has a contact surface 43 against the sliding surface 37 of the nozzle body 27. The annular seal member is pressed against the collar 29 by a coil spring 45 disposed between the flanges 44. The contact surface 46 between the inner ring 42 and the outer ring 44 is formed in a spherical shape, and the relative angle between the inner ring 42 and the outer ring 44 can be changed. The fitting portion 41 and the contact portion 46 form a fixed seal surface, and the contact surface 43 of the outer ring 44 and the sliding surface 37 form a rotary seal surface A. Therefore, even if the nozzle body 27 is slightly inclined, the sealing performance is not impaired.

Also in this example, the same effect as that of the first embodiment of the seal structure can be obtained. Further, in this example, an annular ring 47 may be interposed between the outer ring 44 and the collar 29. In that case, since the sliding surface 37 contacts the annular ring 47, the sliding surface 37 is not worn down.

Further, a fourth seal structure example will be described with reference to FIG. In this example, the annular seal member includes an annular U packing 48 and two annular rings 49 and 50 interposed between the U packing 48 and the collar 29. U
The outermost peripheral portion 51 of the packing 48 contacts the inner peripheral surface of the nozzle insertion hole 23 of the water supply pipe 8, and the first annular ring 49 contacts the flange-side end portion thereof. Further, the second annular ring 50 is arranged on the flange side. Therefore, the rotary seal surface A that slides between the first annular ring 49 and the second annular ring 50 is formed. Therefore, a sufficient seal structure can be obtained with a simple structure.

Also in this example, substantially the same effect as that of the first embodiment of the seal structure can be produced. In particular, for the left and right inclination of the long cleaning nozzle 6, the U packing 48
The expansion and contraction function of works to prevent the appearance of gaps.

The case where both ends of the long cleaning nozzle 6 are pivotally supported has been described above, but the water supply pipe 8 when only the central portion of the long cleaning nozzle 6 is gripped by the water supply pipe 8 will be described below.
An example of the seal structure between the nozzle body 27 and the nozzle body 27 will be described with reference to FIG. In this example, as the annular seal member, two annular rings 53 having different diameters are provided between the inner peripheral surface of the nozzle insertion hole 23 of the water supply pipe 8 and the outer peripheral surface of the nozzle body 27.
Is interposed. The sealing surface 5 in which the two annular rings 53 and the water supply pipe 8 or the nozzle body 27 are in close contact with each other
The rotation seal surface A slides between the 4, 55 and two annular rings to prevent water leakage between the water supply pipe 8 and the nozzle body 27.

From the above point of view, in the seal structure using the coil spring 36, the coil spring 36 is sandwiched between the two annular seal members to operate, but the water supply pipe 8 and the annular seal member operate. The same effect can be obtained even if different coil springs 36 are sandwiched between the two to act. Further, instead of the coil spring 36, a leaf spring may be formed inside the water supply pipe 8, and another elastic body may be used.

Further, in the rotary seal structure in which the annular seal member directly contacts the sliding surface 37 of the nozzle body 27,
The wear of the sliding surface 37 can be eliminated by interposing the annular ring between them.

Further, instead of forming the sliding surface 37 perpendicular to the rotation axis of the long cleaning nozzle 6 on the nozzle body 27, it may be formed on the water supply pipe 8. In this case, the elastic body that presses the annular seal member needs to act between the nozzle body 27 and the left and right annular seal members.

[0041]

According to the present invention, it is possible to prevent water from leaking from the vicinity of the sliding portion of the cleaning nozzle that rotates about the horizontal longitudinal direction, and thus to maintain the jetting force of the cleaning nozzle and achieve a high cleaning ability. Can be held. In addition, it is possible to prevent deterioration of rotation performance and sealing performance.

Particularly, by making the rotary seal surface vertical, the load of the cleaning nozzle and the water supply pipe is not applied to the rotary seal surface, so that the seal surface is prevented from being worn down and water leakage from it can be prevented for a long time. it can.

[Brief description of drawings]

FIG. 1 is a perspective view of a dishwasher showing an embodiment of the present invention.

FIG. 2 is a schematic front view showing a state where the door of the dishwasher of FIG. 1 is removed.

FIG. 3 is a schematic perspective view of FIG.

FIG. 4 is a front view horizontal cross-sectional view of the cleaning tank.

5 is a diagram showing a state in which a tableware basket is incorporated in FIG. 4. FIG.

FIG. 6 is a plan view showing the bottom of the cleaning tank.

FIG. 7 is a cross-sectional view of a long cleaning nozzle.

FIG. 8 is a diagram showing a disassembled long cleaning nozzle,
(A) is a plan view of the right nozzle, (b) is a vertical sectional view of the right nozzle, (c) is a plan view of the left nozzle, and (b) is a vertical sectional view of the left nozzle.

FIG. 9 is a view showing a water pipe, (a) is a right side view,
(B) is a plan view, (c) is a front view central longitudinal cross-sectional view.

FIG. 10 is a cross-sectional view showing a first embodiment of a seal structure for a long cleaning nozzle and a water supply pipe.

FIG. 11 is a sectional view showing a second embodiment of the seal structure for the long cleaning nozzle and the water supply pipe.

FIG. 12 is a sectional view showing a third embodiment of the seal structure for the long cleaning nozzle and the water supply pipe.

FIG. 13 is a sectional view showing a fourth embodiment of the seal structure for the long cleaning nozzle and the water supply pipe.

FIG. 14 is a cross-sectional view showing an example of a seal structure between the long cleaning nozzle and the water supply pipe when the central portion of the long cleaning nozzle is held by the water supply pipe.

[Explanation of symbols]

 1 ... Dishwasher 6 ... Washing nozzle (long washing nozzle) 8 ... Water pipe 10, 11 ... Shaft 23 ... Nozzle insertion hole 24 ... Water inlet 25 ... Water transfer Groove 26 ... Water guide port 28 ... Jet port 32 ... Sliding ring 33 ... Fitting part 36 ... Elastic body (coil spring) 37 ... Sliding surface 39 ... Bellows 42・ ・ ・ Inner ring 44 ・ ・ ・ Outer ring 46 ・ ・ ・ Contact surface 48 ・ ・ ・ Ring packing 49, 50, 53 ・ ・ ・ Ring ring A ・ ・ ・ Rotating seal surface

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hisashi Nogaki 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu City, Fukuoka Prefecture Totoki Equipment Co., Ltd.

Claims (12)

[Claims] 1. A cylindrical cleaning nozzle having a plurality of injection ports on its outer peripheral surface, which injects cleaning water from the injection ports while rotating about its longitudinal direction as an axis, and a nozzle insertion having a water supply port to the cleaning nozzle. A water washing pipe having a water supply pipe having a hole, wherein the washing nozzle is inserted into the nozzle insertion hole of the water supply pipe and the washing nozzle is horizontally arranged, wherein the washing nozzle is wrapped in the nozzle insertion hole. A dishwasher, wherein a water guide port communicating with the water feed port is formed on the outer peripheral surface, and an annular seal member is provided in a gap between the water feed pipe and the washing nozzle. 2. Both ends of the cleaning nozzle in the longitudinal direction are
The dishwasher according to claim 1, wherein the dishwasher is rotatably supported by a shaft or a bearing provided inside the washing tank. 3. A sliding surface, which is perpendicular to the rotation axis of the cleaning nozzle and faces a side surface of the water supply pipe, is formed on the outer peripheral surface of the cleaning nozzle with the water guide port interposed therebetween. The dishwasher according to claim 1 or 2, wherein the annular seal member is interposed between water pipes, and a contact portion between the sliding surface and the annular seal member is a rotary seal surface. 4. The water supply pipe side of the annular seal member is inserted between the inner peripheral surface of the nozzle insertion hole of the water supply pipe and the outer peripheral surface of the washing nozzle, and the inner peripheral surface of the nozzle insertion hole is formed on the outer peripheral surface of the annular seal member. A fitting portion that closely adheres to the peripheral surface was provided, an elastic body was housed in the nozzle insertion hole of the water supply pipe, and the outer end surface of the annular seal member was pressed in the sliding surface direction of the cleaning nozzle by the repulsive force of the elastic body. The dishwasher according to claim 3, wherein: 5. The dishwasher according to claim 4, wherein an outer end portion of the annular seal member has a diameter larger than an inner circumference of a nozzle insertion hole of the water supply pipe. 6. The dishwasher according to claim 4, wherein the fitting portion of the annular seal member has an R shape. 7. The contact surface between the inner ring and the outer ring, wherein the annular seal member is composed of an inner ring having a fitting portion for the water pipe and an outer ring having a rotary seal surface for the sliding surface. 5. The dishwasher according to claim 3, wherein the contact surface is kept watertight even when the outer ring is inclined with respect to the inner ring. 8. The dishwasher according to claim 3, wherein the annular seal member is a bellows. 9. The annular seal member comprises an annular packing and a plurality of annular rings, the outer peripheral surface of the annular packing is closely attached to the inner peripheral surface of the water pipe, and the annular ring is attached to the cleaning nozzle. 5. The tableware according to claim 3, wherein the contact surface between the annular ring and the sliding surface of the cleaning nozzle is a rotary seal surface, and is interposed between the sliding surface of the annular packing and the outer end surface of the annular packing. washing machine. 10. A sliding surface perpendicular to a rotation axis of the cleaning nozzle is formed on both sides of the water supply pipe, and the annular seal member is interposed between the sliding surface and the cleaning nozzle, and the sliding surface is provided. The dishwasher according to claim 1 or 2, wherein a contact portion between the moving surface and the annular seal member is a rotary seal surface. 11. The dishwasher according to claim 1, wherein the cleaning nozzle is rotatably held by the water supply pipe with the annular seal member interposed therebetween. 12. The dishwasher according to claim 2, wherein a water guide groove surrounding the water inlet of the cleaning nozzle is formed in the nozzle insertion hole of the water supply pipe.