JP2000033067A - Dish washer nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dish washer nozzle capable of easily positioning two nozzle members made of synthetic resin relatively and strongly welding and fixing the respective nozzle members with each other. SOLUTION: At the time of joining a first nozzle member 20 and a second nozzle member 21 with each other, a positioning groove part 23 and a positioning projection part 22 are fitted to each other at the point of time of joining the joining part 26 of the first nozzle member 20 and the joining part 30 of the second nozzle member 21, and by performing vibration welding, the respective positioning groove parts 23 and the positioning projection parts 22 are also welded together with the respective joining parts 26 and 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher nozzle formed by welding two nozzle members made of synthetic resin to each other, and in particular, to easily position each nozzle member with respect to each other. The present invention also relates to a dishwasher nozzle capable of firmly welding and fixing the nozzle members to each other.

[0002]

2. Description of the Related Art Conventionally, as a method of manufacturing a washing nozzle used in a dishwasher, for example, there is a method of integrally molding a continuous resin by using a blow molding method.
According to such a blow molding method, there is an advantage that the cleaning nozzle can be used as it is because the cleaning nozzle is integrally formed as a whole. However, in this type of washing nozzle, it is generally necessary to form the washing water jet radially with respect to the washing nozzle in order to improve the washing efficiency of the dish by jetting the washing water from the washing jet in a wide angle range. In order to form such a washing water injection port, insert molding must be used. As a result, there is a problem that the cost of the cleaning nozzle is increased.

[0003] Further, in manufacturing a washing nozzle, dishwashing is performed by forming a fitting hole in a commercially available pipe and fitting a member constituting a washing water injection port into the fitting hole. Machine nozzles also exist. However, even in this type of dishwasher nozzle, it takes time to form a fitting hole in a pipe, and as a result, the cost of the dishwasher nozzle is increased.

[0004] In view of the above-mentioned circumstances, it is common practice to form a dishwasher nozzle with two nozzle members and join the nozzle members to each other. For example, Japanese Utility Model Laid-Open No. 63-199761 discloses a two-part structure including an upper nozzle arm having an injection port formed of synthetic resin and a lower nozzle arm formed of metal. A dishwasher nozzle of a dishwasher configured by screwing a lower nozzle arm to a plurality of formed bosses is described. This dishwasher nozzle can be manufactured relatively easily because it is not necessary to use the complicated molding method as described above.

[0005]

SUMMARY OF THE INVENTION
In the dishwasher nozzle described in 3-199761, if the screw hole of each nozzle arm is slightly displaced from the boss, it becomes difficult to fasten and fix the screw to the boss.
It is necessary to match the boss with the screw. However, in this dishwasher nozzle, no member is provided for positioning the boss of the upper nozzle arm and the screw hole of the lower nozzle arm with respect to each other. Therefore, it is difficult to position the upper nozzle arm and the lower nozzle arm with respect to each other, and there is a problem that it takes time to fasten both nozzle arms.

In addition, the upper nozzle arm and the lower nozzle arm are screwed at a plurality of locations when assembled, and such screwing operation itself is complicated, and the screwing operation takes time and the assembly is complicated. I can't deny it. Further, since one of the nozzle arms is formed of metal, the weight of the dishwasher nozzle itself is increased, and it is necessary to increase the pressure of the washing water to obtain a desired rotational force.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and allows two synthetic resin nozzle members to be easily positioned relative to each other.
An object of the present invention is to provide a dishwasher nozzle capable of firmly fixing and fixing each nozzle member to each other.

[0008]

According to a first aspect of the present invention, there is provided a dishwasher nozzle according to the first aspect, wherein the first nozzle member is made of a resin and has a first joining portion around the first nozzle member. And a second resin member having a plurality of cleaning water injection ports formed around the second joint portion joined to the first joint portion of the resin, the first joint portion and the second joint portion. Is characterized by being joined to each other through vibration welding.

In the dishwasher nozzle according to the first aspect, a first joint portion is formed around a first nozzle member made of resin, and a second nozzle made of resin having a plurality of washing water injection ports formed therein. A second joining portion joined to the first joining portion of the first nozzle member is formed around the member, and the first joining portion and the second joining portion are joined when joining the first nozzle member and the second nozzle member. The first nozzle member and the second nozzle member can be easily positioned relative to each other by the cooperative action with the portion. Also,
The first nozzle member and the second nozzle member are welded to each other by vibration welding the first joint portion and the second joint portion in a state where they are positioned by the first joint portion and the second joint portion. . As described above, the first nozzle member and the second nozzle member are welded and fixed through vibration welding between the first joint portion and the second joint portion, and can be performed in a short time without performing a complicated operation such as screwing. It can be easily assembled. A dishwasher nozzle according to a second aspect of the present invention is the dishwasher nozzle according to the first aspect, wherein a first positioning portion formed on an inner wall of the first nozzle member and an inner wall of the second nozzle member are formed. A second positioning portion that positions the first nozzle member and the second nozzle member in cooperation with the first positioning portion in a state where the first bonding portion and the second bonding portion are bonded to each other; The first positioning portion and the second positioning portion are welded to each other during vibration welding.
In the dishwasher nozzle according to the second aspect, the first positioning member is formed on the first nozzle member and the second positioning portion is formed on the second nozzle member, and the first positioning member and the second positioning portion cooperate with each other. The first nozzle member and the second nozzle member are positioned and fixed in a state where the first joint portion and the second joint portion are joined based on the first nozzle member and the second nozzle member. It is possible to perform mutual positioning with a proper positional relationship. Further, the first nozzle member and the second nozzle member
At the time of vibration welding of the nozzle member, the first joint portion and the second joint portion are mutually vibration-welded, and at the same time, the first positioning portion and the second positioning portion are also mutually welded. The second nozzle member can be more securely welded and fixed. This makes it possible to prevent the dishwasher nozzle from bulging outward and deforming even when the pressure inside the dishwasher nozzle increases due to the water pressure of the washing water.

Further, the dishwasher nozzle according to claim 3 is formed substantially at the center of the first nozzle member and the second nozzle member in the dishwasher nozzle according to claim 2,
A cleaning water supply port for supplying the cleaning water into the dishwasher nozzle, wherein the first positioning portion and the second positioning portion have a predetermined shape for reducing a flow resistance of the cleaning water supplied from the cleaning water supply port; It is characterized by being formed in. In the dishwasher nozzle according to the third aspect, since both the first positioning portion and the second positioning portion are formed in a shape that reduces the water flow resistance of the cleaning water, the cleaning water supplied from the cleaning water supply port is used. When jetting from the plurality of cleaning jets formed in the second nozzle member, it is possible to prevent the jetting power of the washing water from decreasing. In addition, even if the first positioning portion and the second positioning portion exist, the water flow of the cleaning water is not obstructed by the first positioning portion and the second positioning portion. Therefore, even if a small pump is used, the cleaning performance does not decrease. Preferably, the predetermined shape is an ellipse or a wedge.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a dishwasher nozzle according to the present invention will be described in detail with reference to the drawings based on an embodiment embodying the present invention. First, a dishwasher using the dishwasher nozzle according to the present embodiment will be described with reference to FIG. FIG. 1 is a side sectional view schematically showing a dishwasher. A dishwasher 1 includes a base 2 and a base 2.
And a hood 4 for partitioning the closed cleaning chamber 3 above. The hood 4 is vertically movable with respect to the base 2 via a known vertical movement mechanism (not shown). The hood 4 is used for storing dirty tableware 5 in the washing room 3 and for the washing room. The tableware 5 is moved upward when the washed tableware 5 is taken out from the container 3, and is moved downward when the tableware 5 is washed (the position shown in FIG. 1).

A dish rack 6 is provided in the washing room 3. The dish rack 6 has many gaps so that washing water can pass in the vertical direction.
Tableware 5 is placed on the table.

A pair of dishwasher nozzles 7 and 8 having the same configuration (detailed configuration will be described later) are arranged at upper and lower positions separated from the tableware rack 6 by a fixed distance. Each dishwasher nozzle 7, 8 is provided with a washing water supply pipe 9
Is rotatably attached to the end of the dishwasher. When washing water is ejected from a plurality of washing water jets formed in the dishwasher nozzles 7 and 8, the horizontal level of the jet reaction force from the washing water jets is increased. It is rotated through a component force. These dishwasher nozzles 7 and 8 are connected to a washing pump 10 disposed on the base 2 via a washing water supply pipe 9. Further, the base 2 is provided with a washing water tank 12 for storing washing water, and the washing water tank 12 is connected to the washing pump 10. Thus, when washing the tableware 5 placed on the tableware rack 6, the washing water in the washing water tank 12 is supplied from the washing water supply pipe 9 via the washing pump 10 to each dishwasher nozzle 7, The washing water is supplied to the washing machine 8 and the washing water is sprayed from the washing water jets formed in the dishwasher nozzles 7 and 8 to the washing machine 5 to wash the washing machine 5.

A pair of rinsing nozzles 13 and 14 (having a rinsing water injection port (not shown)) are disposed adjacent to the dishwasher nozzles 7 and 8, respectively. 13 and 14 are connected to a rinse pump 16 via a rinse water supply pipe 15. Further, a rinsing water tank 17 that communicates with the rinsing pump 16 and stores rinsing water therein is disposed outside the base 2. Thus, when rinsing the washed tableware 5, the rinsing pump 16 is driven, and the rinsing water in the rinsing water tank 17 is supplied from the rinsing water supply pipe 15 to each of the rinsing nozzles 13, 14. Each rinsing nozzle 13,
The rinsing water supplied to 14 is jetted from the rinsing water jet to the tableware 5 placed on the tableware rack 6 to be rinsed.

Next, the dishwasher nozzle 7 of the present embodiment,
8 will be described with reference to FIGS. FIG.
Is a sectional view of a washing machine nozzle, FIG. 3 is an exploded explanatory view showing two first nozzle members and a second nozzle member constituting the dish washing machine nozzle from the back surface, and FIG. 4 is a first positioning portion of the first nozzle member. 5 is an enlarged plan view of a second positioning member of the second nozzle member, and FIG. 5 is a cross-sectional view showing a welding method for welding the first nozzle member and the second nozzle member to each other. Since the upper dishwasher nozzle 7 and the lower dishwasher nozzle 8 used in the dishwasher 1 have the same configuration, the lower dishwasher nozzle 8 will be described below as an example. I do.

The dishwasher nozzle 8 is constructed by joining a pair of upper and lower first nozzle members 20 and second nozzle members 21. A washing water supply port 28 is formed at the center of the dishwasher nozzle 8, and the washing water supply port 28 is attached to each of the upper and lower ends of the washing supply pipe 9 as described above. Thus, the dishwasher nozzle 8 is rotatably held with respect to the washing water supply pipe 9. The washing water nozzle 24 is provided in the dishwasher nozzle 8.
Are formed, and the washing water flowing along the water flow direction A inside the nozzle is ejected from each washing water injection port 24.

On the outer side of the first nozzle member 20, three cleaning water injection ports 24 are provided on both sides of the cleaning water supply port 28 as a reference.
Is formed, and each washing water injection port 24 has a washing water supply port 28.
The washing water flowing along the water flow direction A is jetted. The dishwasher nozzle 8 is rotated by a horizontal component of a reaction force of the spray from the wash water jets 24 generated when the wash water is jetted from the plurality of wash water jets 24.

A concave joining portion 26 is formed around the first nozzle member 20. Two concave portions 26 are formed on the inner wall surface of the first nozzle member 20 at positions substantially equidistant from the washing water supply port 28. A concave positioning groove 23 is formed. The positioning groove 23 will be described later in detail.

A convex joint 30 is formed around the second nozzle member 21.
At a position approximately equidistant from the washing water supply port 28 on the inner wall surface of
Two convex positioning projections 22 are formed corresponding to the respective positioning grooves 23 of the first nozzle member 20.
Here, the concave joint portion 26 and the convex joint portion 30 of the first nozzle member 20 are joined to each other based on their shapes, and the first nozzle member 20 is joined by the joint portions 26 and 30. , The second nozzle member 21 is joined to the second
The positioning projection 22 of the nozzle member 21 is fitted into the positioning groove 23 of the first nozzle member 20. The detailed configuration of the positioning projection 22 will be described later.

As shown in FIG. 4A, the positioning groove portion 23 is formed of a base portion 23A parallel to the water flow direction A, a front guide portion 23B crossing the water flow direction A, and a rear guide portion 23E. Grooves 23C and 23G are formed in the rear portion 23E, respectively. And the groove 23C,
Each base member 22A of the positioning projection 22 shown in FIG.
21 are positioned relative to each other. The side end 23F with respect to the base 23A has an elliptical shape, and the side surface 23D of the guide front portion 23B for the water flow is inclined with respect to the water flow direction A. Therefore, it is possible to reduce the resistance generated with respect to the water flow, and it is possible to prevent a decrease in the jetting power of the washing water when jetting from each washing jet port 24.

As shown in FIG. 4B, the positioning projection 22 has a base 22A parallel to the water flow direction A.
In order to reinforce A, it has an auxiliary portion 22B. As described above, the base portion 22A is positioned by entering the inside of the grooves 23C and 23G in FIG. Base 22
At A, the side end 22C for the water flow is elliptical, and the auxiliary portion 22B is inclined with respect to the water flow direction A. Therefore, the side end of the base 22A and the auxiliary portion 22B can reduce the resistance generated to the water flow.

As described above, the positioning grooves 23 and the positioning projections 22 reduce the flow resistance of the washing water, prevent the washing power of the washing water from being reduced when spraying from each washing outlet, and reduce the dishwashing power. Can be kept high.

First nozzle member 20 and second nozzle member 21
When the cleaning nozzle 8 is manufactured by assembling the second nozzle member 2 inside the concave joining portion 26 of the first nozzle member 20
It is tentatively assembled by fitting the one convex joint 30. At this time, the positioning groove 23 formed on the first nozzle member 20 and the positioning protrusion 22 formed on the second nozzle member 21 are fitted to each other, and the positioning protrusion 22
22A of the positioning groove 23 enters the inside of the grooves 23C and 23G. Thereby, the second nozzle member 21 is formed based on the cooperation of the positioning groove 23 and the positioning protrusion 22.
And the first nozzle member 20 are positioned with respect to each other. Therefore, the first nozzle members 20 and 21 can be temporarily assembled at an appropriate position.

First nozzle member 20 and second nozzle member 21
After the temporary assembling, as shown in FIG. 5, vibration is applied by applying vibration in the longitudinal direction with the molds K1 and K2 sandwiched therebetween. Based on this, each joint 2 of the first nozzle member 20 and the second nozzle member 21
6 and 30 are welded by vibration welding, and the grooves 23C and 23G of the positioning groove 23 of the first nozzle member 20 and the base 22A of the positioning protrusion 22 of the second nozzle member 21 are vibration-welded. The nozzle 8 becomes stronger and suppresses expansion due to the internal pressure of the water flow when the cleaning water flows in the water flow direction A. Here, the vibration welding is performed between the joint 26 of the first nozzle member 20 and the joint 30 of the second nozzle member 21 and the grooves 23A, 23 of the positioning groove 23.
G and the base 22A of the protruding portion 22 (typically, 1
(100-120 Hz) for welding.
Instead of such vibration welding, use is made of ultrasonic vibration which applies high frequency longitudinal vibration (20 to 30 kHz) and welds between the joints 26 and 30 and between the grooves 23A and 23G and the base 20A. The joints 26, 30 and the grooves 23A, 23G and the base 20A can be mutually welded by ultrasonic welding.

As described above, in the dishwasher nozzles 7 and 8 according to the present embodiment, when the first nozzle member 20 and the second nozzle member 21 are joined to each other, the joining portion 26 of the first nozzle member 20 and the 2 When the joining portion 30 of the nozzle member 21 is joined, the positioning groove 23 and the positioning protrusion 2
2 and the first nozzle member 2
0 and the second nozzle member 21 can be easily temporarily assembled. Further, as described above, the first nozzle member and the second nozzle member are temporarily assembled via the joints 26 and 30, the positioning groove 23, and the positioning protrusion 22, and are subjected to vibration welding so that each joint is formed. Since the positioning grooves 23 and the positioning projections 22 are also welded together with 26 and 30, the dishwasher nozzle 8 becomes stronger and the washing water flows in the water flow direction A.
Expansion due to the internal pressure of the water flow when flowing through the water can be suppressed.

In the positioning groove 23, the base 23
The side end 23F of A is formed in an elliptical shape, and the side surface 23D of the guide front portion 23B is inclined with respect to the water flow A. At the same time, the side end 22C of the base 22A in the positioning projection 22 has an elliptical shape. Since the auxiliary portion 22B is formed and inclined with respect to the water flow, it is possible to reduce the resistance generated with respect to the water flow. It is possible to prevent the deterioration and prevent the dishwashing power from being lowered.

The above embodiment does not limit the gist of the present invention, and it is needless to say that individual improvements and modifications can be made without departing from the gist of the present invention. For example, in the positioning groove 23, the side end 23F of the base 23A
And the side end 2 of the base 22A in the positioning projection 22
Although 2C has an elliptical shape, a similar effect can be obtained even if it has a wedge shape as shown in FIG.

Further, in the above embodiment, the dishwasher nozzle 7,
8 is shown as an example, but the same effect can be obtained with the rinsing nozzles 13 and 14.

[0029]

As described above, in the dishwasher nozzle according to the first aspect, the first nozzle member is formed around the first nozzle member made of resin.
Forming a joining portion, forming a second joining portion joined to the first joining portion of the first nozzle member around a resin second nozzle member having a plurality of cleaning water injection ports formed therein, When joining the first nozzle member and the second nozzle member, the first nozzle member and the second nozzle member can be easily positioned relative to each other by the cooperation of the first joint member and the second joint member. In addition, the first nozzle member and the second nozzle member are welded and fixed through vibration welding between the first joint portion and the second joint portion, and can be performed in a short time without performing complicated work such as screwing. Can be easily assembled. In the dishwasher nozzle according to the second aspect, the first positioning member is formed on the first nozzle member and the second positioning portion is formed on the second nozzle member, and the first positioning member and the second positioning portion cooperate with each other. The first nozzle member and the second nozzle member are positioned and fixed in a state where the first joint portion and the second joint portion are joined based on the above. Therefore, the first nozzle member and the second nozzle member are further joined. It is possible to position each other with an accurate positional relationship, and furthermore, at the time of vibration welding of the first nozzle member and the second nozzle member, the first joint portion and the second joint portion are mutually vibration-welded, Since the first positioning portion and the second positioning portion are also welded to each other, the first nozzle member portion and the second
The nozzle member can be more securely welded and fixed. This makes it possible to prevent the dishwasher nozzle from bulging outward and deforming even when the pressure inside the dishwasher nozzle increases due to the water pressure of the washing water. Furthermore, in the dishwasher nozzle according to claim 3,
Since both the first positioning portion and the second positioning portion are formed in a shape that reduces the flow resistance of the cleaning water, the cleaning water supplied from the cleaning water supply port is supplied to the plurality of cleaning water formed on the second nozzle member. It is possible to prevent the jetting power of the washing water from decreasing when jetting from each washing jet. In addition, even if the first positioning portion and the second positioning portion exist, since the water flow of the washing water is not hindered by these,
Even if a small pump is used, the cleaning ability does not decrease. As described above, the present invention provides a dishwasher nozzle capable of easily positioning two synthetic resin nozzle members with respect to each other, and capable of firmly welding and fixing the respective nozzle members to each other. Can be.

[Brief description of the drawings]

FIG. 1 is a side sectional view schematically showing a dishwasher.

FIG. 2 is a sectional view of a washing machine nozzle,

FIG. 3 is an exploded explanatory view showing two first nozzle members and a second nozzle member constituting the dishwasher nozzle from the back surface.

FIG. 4 is an enlarged plan view of a positioning groove in a first nozzle member and a positioning protrusion in a second nozzle member.

FIG. 5 is an explanatory view showing a method of welding a dishwasher nozzle.

FIG. 6 is an enlarged plan view of a positioning groove in a first nozzle member and a positioning protrusion in a second nozzle member according to another embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Dishwasher, 3 ... Wash tank, 4 ... Washer main body, 6 ... Opening and closing door 7, 8 ... Dishwasher nozzle, 20, 21 ... Nozzle member 22 ..Positioning projections, 23 positioning grooves, 24, injection ports 26, 30 joints, 28 cleaning water supply ports
A: Washing water flow direction

Claims (3)

[Claims] 1. A first resin-made first member having a first joint portion around the first member.
A nozzle member, a resin second nozzle member having a second joint portion joined to the first joint portion of the first nozzle member around the periphery, and having a plurality of washing water injection ports formed therein; A dishwasher nozzle, wherein the first joint and the second joint are joined to each other via vibration welding. A first positioning portion formed on an inner wall of the first nozzle member; and a first positioning portion formed on an inner wall of the second nozzle member, wherein the first bonding portion and the second bonding portion are bonded to each other. A second positioning portion for positioning the first nozzle member and the second nozzle member in cooperation with each other with the first positioning portion, wherein the first positioning portion and the second positioning portion are welded to each other during the vibration welding. The dishwasher nozzle according to claim 1, wherein: 3. A washing water supply port formed at a substantially central position between the first nozzle member and the second nozzle member to supply washing water into the dishwasher nozzle, wherein the first positioning portion and the second positioning member are provided. The dishwasher nozzle according to claim 2, wherein the positioning portion is formed in a predetermined shape to reduce a flow resistance of the washing water supplied from the washing water supply port.