JPH0616587Y2 - Dishwasher - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a rotary spray type dishwasher in which a spraying arm rotates by the reaction force of the cleaning liquid to wash dishes, and a single spraying arm is used for cleaning liquid. It is intended to improve the support structure of the injection arm of the one capable of supplying the rinsing liquid.

(Prior Art) Generally, in a dishwasher equipped with this type of jetting arm of a rotary jetting type, the effective space in the up-down direction of the washing chamber is determined by the facing interval between the upper and lower jetting arms. The applicant of the present application is
In order to expand the above-mentioned effective space, a cleaning arm and a rinsing arm are integrated so that the facing distance between the upper and lower injection arms can be set large (Japanese Patent Application No. 62-113699).

As shown in FIG. 9, this integral injection arm (5)
Is a bearing in which a cleaning liquid passage (20) and a rinsing liquid passage (21) are separated from each other in a hollow arm, and a central portion of the arm serves as a joint between the passages (20) and (21). It is retained by a nut body (50) that is screwed in.

(Problems to be Solved by the Invention) In the above injection arm (5), a rotating seat (51) at the center of the arm bottom wall and a rotating seat (52) provided at the proximal end of the rinse liquid passage (21) are provided. , And the shaft portions (53) and (54) on the bearing member (15) side respectively support them simultaneously. That is,
Both thrust passages (20), (2
Connection of 1) is performed. Therefore, each rotary seat (5
Due to variations in the position dimensions of 1) and (52), a gap was created in either one, and water leakage was likely to occur. In particular, the injection arm (5) is composed of three members: an arm body (13) divided into upper and lower parts, a lid body (14), and a partition body (19) fixed to the inner surface of the lid body (14). However, it is difficult to obtain the relative positional accuracy of the upper and lower rotary seats (51) and (52), and water leakage is likely to occur at the upper rotary seat (52). Also, water leakage was likely to occur at the rotary sliding contact surface (55) between the lid body (14) and the pipe body (44).

Further, in the above-mentioned injection arm (5), the retaining nut body (50) projects from the outer surface of the center of the arm. Therefore, in this type of injection arm (5), the nut body (50)
Is a factor that determines the effective space in the vertical direction of the cleaning chamber, and the nut body (5
It was desired to reduce the protrusion length of 0).

The present invention has been made in view of the above point, and by improving the support structure of the injection arm, water leakage at the rotation support portion is eliminated, and separate supply of rinse liquid and cleaning liquid is ensured. The purpose is to reduce the loss due to water leakage at the same time.

Another object of the present invention is to increase the effective space of the cleaning chamber in the vertical direction by preventing the ejection arm from being pulled out on the bottom wall side of the arm.

(Means for Solving the Problem) In the means taken by the present invention, the rinsing liquid passage (21) and the bearing member (15) are connected to each other in a radial surface-bonding manner.
Eliminates water leaks caused by variations in the positional dimensions of the rotatable passage connection parts. Further, the rotation seat (33) provided at the center of the bottom wall of the arm body (13) is retained and supported by the arm holding body (35) to eliminate the protrusion of the nut body,
The effective space can be expanded.

Specifically, as shown in FIG. 1, first, the bearing member (15) has an upper end opened and a tubular body (44) extending upwardly provided inside the bearing member (15). ), Two liquid passages (31) and (32) communicating with the cleaning liquid supply passage (10) and the rinsing liquid supply passage (11) are divided into an outer side and an inner side of the pipe body (44). There is. On the other hand, inside the injection arm (5), the partition body (19)
The two liquid passages (20) and (21) for the cleaning liquid and the rinsing liquid that extend in the longitudinal direction are separated from each other and formed. A circular port is formed in the center of the bottom wall of the injection arm (5) so as to communicate with the liquid passage (20) located on the lower side, and a rotary seat (33) is formed on the outer peripheral edge of the circular port. Further, at the center of the bottom wall of the partition body (19), an introduction tube (3) whose inside communicates with the liquid passage (21) located on the upper side.
4) is formed concentrically with the circular mouth and is formed so as to project downward, and the introduction cylinder (34) is connected to the tubular body (4) of the bearing member (15).
4) so that one of the liquid passages (21) is connected to the liquid passage (32) in the pipe body (44). In addition, the rotary seat (33) is a single arm holding body (35) fitted and fixed to the bearing member (15) or the arm holding body (3).
5) and the outer peripheral upper end surface of the bearing member (15), and by fixing the arm holding body (35) and the bearing member (15), liquid outside the other liquid passage (20) and the pipe body (44). Road (3
1) and the injection arm (5) is rotatably retained and supported by the bearing member (15).

(Operation) As described above, in the rotary seat (33), by thrust surface bonding, and also in the introduction liquid pipe (34) on the rinse liquid passage (21) side.
Then, if the passage joining is performed by the radial surface joining, it is possible to ignore the correlation of variations in the position dimensions and the like at the passage joining portion between the cleaning liquid passage (20) and the rinse liquid passage (21). Therefore, the generation of the gap in the rotation support portion is eliminated, and water leakage can be prevented.

In addition, the injection arm (5) with respect to the bearing member (15),
Since the bottom wall side is supported by the arm holder (35) for retaining, the retaining member is prevented from projecting to the upper surface of the arm, and the vertical direction of the cleaning chamber (3) corresponds to the protrusion length. The effective space can be expanded.

Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

1 to 7 show a first embodiment of the present invention,
In FIG. 2, the dishwasher (1) has a cleaning liquid tank (2) for partitioning the inside of the machine into two chambers, an upper chamber and a rack (4) for storing the dishes (A) to be washed. Rack (4) and tableware (A)
The injection arms (5) and (5) are arranged vertically opposite to each other with the injection arms interposed therebetween. Further, in the lower equipment room (6), a pump (7) for supplying a cleaning liquid, a pump (8) for supplying a rinsing liquid, a motor (not shown) for driving both pumps, and a constant temperature. Equipment such as a rinse liquid tank (9) for storing the heated rinse liquid is arranged.

The cleaning liquid pump (7) sucks and pressurizes the cleaning liquid in the cleaning liquid tank (2) through the strainer, and then the upper and lower injection arms (5) through the cleaning liquid supply passage (10).
Send to (5). Further, the rinsing liquid pump (8) sucks and pressurizes the rinsing liquid from the rinsing liquid tank (9), and the upper and lower injection arms (5), (5) through the rinsing liquid supply passage (11). To send to. A constant rate detergent is mixed in the cleaning solution, and a constant rate rinse agent is mixed in the rinse solution, and both are automatically mixed in the raw water by a detergent feeder and a rinse agent feeder (not shown).

The upper and lower spray arms (5), (5) have the same structure, and spray the cleaning liquid or rinsing liquid diagonally from above and below toward the tableware (A). As shown in FIGS. 3 to 5, the injection arm (5) is formed in a hollow container shape that is long in the left and right by an arm body (13) and a lid body (14) that are vertically divided into two parts. The central portion in the direction is rotatably supported by a bearing member (15) which also serves as a joint.
Each of the arm body (13) and the lid body (14) is formed in a propeller shape in a plan view and has a substantially U-shaped cross section orthogonal to the longitudinal direction. Then, the joint flanges (13a) and (14a) are projected from the opening peripheral edge of the arm body (13) and the lid body (14), and the joint surfaces of both the flanges (13a) and (14a) are concave and convex. The welding engagement portion (16) is formed in a circular shape.

As shown in FIG. 3, on the upper surface of the lid body (14), a group of cleaning nozzles (17) for spraying and supplying the cleaning liquid and a group of rinsing nozzles (18) for spraying and supplying the rinse liquid are arranged in rows. Are integrally formed into a shape.

As shown by the broken line in FIG. 3, the injection arm (5) is fixed by joining and fixing the auxiliary partition body (19) to the inner surface of the lid body (14) along the alignment line of the rinsing nozzle (18).
A cleaning liquid passage (20) and a rinsing liquid passage (21)
It is divided into two rooms. The auxiliary partition body (19) is formed in a gutter shape having a U-shaped cross section that opens upward, and a flange (19a) for joining is extended from the peripheral edge of the opening to form the flange (19a) and a mating partner of this flange (19a). On the inner surface of the upper wall of the lid body (14) to be formed, a welding engagement portion (22) which is fitted in a concave and convex shape is formed in a circular shape.

A circular opening is formed at the center of the bottom wall of the arm body (13), and a rotary seat (33) is formed at the peripheral edge of the circular opening. Then, from the passage base end of the rinse liquid passage (21), that is, the center of the bottom wall of the auxiliary partition body (19), the introducing cylinder (34) is integrally formed so as to project downward, and the introducing cylinder (3) is formed.
4) is located concentrically with the circular mouth, that is, the rotary seat (33).

By ultrasonically welding the flange (19a) of the auxiliary partition body (19) to the inner surface of the lid body (14) while the welding engagement portion (22) is engaged with each other, both members (14),
A rinsing liquid passage (21) is defined between (19). In order to perform positioning more accurately when fixing both members (14) and (19), claws (24) are provided so as to project from the outer surfaces of the left and right ends of the auxiliary partition body (19) and correspond to these claws (24). Then cover (1
A U-shaped engagement frame (25) is provided on the inner surface of the peripheral side wall of 4) (see FIG. 7).

After fixing the auxiliary compartment (19) to the lid (14),
The lid body (14) is welded to the arm body (13) by the welding engagement portion (1
6) Join the two members in the state of engaging each other, and
By ultrasonically welding the flanges (13a) and (14a) of 3) and (14), the cleaning liquid passage (20) occupying most of the hollow portion is defined. In this joined state, the rib (26) erected from the inner bottom surface of the arm body (13)
Is designed to receive and support the bottom wall of the auxiliary compartment (19) (see FIG. 5). This is the rinse liquid passage (2
This is because the flange (19a) of the auxiliary compartment (19) is reinforced and supported so as not to be separated from the lid (14) by the water pressure acting on 1), and as shown in FIG. ) Are provided in two places on the left and right across the center of the arm. In addition, positioning ribs (27) and (27) are provided at two front and rear positions in the middle of the auxiliary partition body (19) in the longitudinal direction, and the ribs (27) and (27) are provided as shown in FIG. By engaging with the notch (28) on the peripheral side wall of the arm body (13), positioning in the longitudinal direction can be performed.

The three members of the arm body (13), the lid body (14), and the auxiliary partition body (19) were all made of oil-impregnated polyacetal and were molded by injection molding.

In FIG. 1, the bearing member (15) also serves as a joint for connecting the cleaning liquid supply passage (10) and the rinse liquid supply passage (11) connected to the pumps (7) and (8) and the injection arm (5). The inside and outside of the liquid passages (31),
(32) is provided. The outer liquid passage (31) of the both liquid passages (31), (32) communicates with the cleaning liquid passage (20) via the rotary seat (33) at the center of the bottom wall of the arm body (13), and the inner liquid passage (31) The passage (32) is in communication with the rinsing liquid passage (21) via the introduction tube (34) of the auxiliary compartment (19).

As shown in FIG. 6, an arm holder (35) for holding the rotary seat (33) in and out is attached to the rotary seat (33). The arm holder (35) is composed of a vertically divided holding ring (36) and a holding body (37), and the rotary seat (33) is press-fitted and engaged by both members (36) and (37). By doing so, they can be assembled relative to the rotary seat (33) so as to be rotatable relative to each other. This assembling is performed before the arm body (13) and the lid body (14) are integrated. The holding body (37) is formed in a short tubular shape, and a flange (39) for tightening and loosening operation is projected on the outer surface of the holding body (37), and further a screw (40) is formed below the flange (39). .

As shown in FIG. 1, the screw (40) of the arm holder (35)
The arm holder (35) to the bearing member (15) by screwing the screw into the screw hole (42) at the upper end opening of the outer liquid path (31) of the bearing member (15), and thus the injection arm (5).
Is rotatably supported on the bearing member (15) in a thrust surface-bonded state. In this assembled state,
The cleaning liquid passes through the arm holder (35) and the cleaning liquid passage (2
0).

The inner liquid passage (32) for feeding and guiding the rinsing liquid is defined by a pipe body (44) which is watertightly inserted and connected to the inner boss (43) of the bearing member (15). After the tube body (44) is connected to the inner boss (43), it is fixed with a screw (45) and integrated with the bearing member (15). As described above, when the arm holder (35) is assembled to the bearing member (15), the introduction tube (34) provided on the rinse liquid passage (21) side is fitted into the tube body (44), and the radial direction is increased. The inner liquid passage (32) and the rinse liquid passage (21) are connected to each other in a surface-bonded state. In this connected state, the introduction tube (34) can freely rotate with respect to the tubular body (44).

As described above, in short, in the injection arm (5), the rotating seat (33) and the introduction tube (34) are rotatably attached to the bearing member (15) via the arm holder (35) and the tube body (44), respectively. The cleaning liquid passage (20) and the rinsing liquid passage (21) are supported and are connected to the internal and external liquid passages (31) and (32) in this state. The arm holder (35) also holds and supports the entire injection arm (5) against the bearing member (15).

As described above, when the introduction cylinder (34) is fitted into the pipe body (44) in a double-cylinder shape and the rinse liquid passage (21) is connected in a radial surface-bonding manner, the rotation of this connection portion is prevented. Zodiac (3
It is not necessary to consider the positional accuracy in the vertical direction with respect to 3). Therefore, the rotating seat (33) can be rotatably supported in the bearing member (15) in an appropriate clearance state, and the introduction cylinder (34) can also be rotatably connected to the tube body (44) in an appropriate clearance state. Therefore, it is possible to clean up the water leakage at these rotation support parts. In particular, even when the injection arm (5) is composed of the arm body (13), the lid (14), and the auxiliary partition (19), water leakage at the passage connection portion of the rinse liquid passage (21) is prevented. It never happens.

The arm body (13), the lid body (14), and the auxiliary partition body (19) define a cleaning liquid passage (20) and a rinsing liquid passage (21) inside the ejection arm (5). This is because each of the above three members can have a simple cross-sectional shape that facilitates die-cutting, which can realize simplification of the structure of the molding die and improvement of moldability, and the lid body (14). Together with the fact that the auxiliary partitioning body (19), and the lid body (14) and the arm body (13) can be joined and fixed individually, and the width and shape of each joint portion can be set arbitrarily, Three members (13),
This is because the joining of (14) and (19) can be performed easily and surely.

An arm holding body (35) is attached to a rotating seat (33) provided on the bottom wall of the arm body (13), and the whole ejecting arm (5) is pulled out by this holding body (35) via the rotating seat (33). Since the stopper is performed, the protrusion of the retaining member on the upper surface of the injection arm (5) is eliminated, and the effective space in the vertical direction in the cleaning chamber (3) can be expanded by that much.

(Modification) FIG. 8 shows a modification of the arm holder (35). This is different from the above-mentioned embodiment in that the flange (47) is projected on the outer surface of the rotary seat (33) and the flange (47) is retained by the nut-shaped arm holder (35) so as not to be pulled out.
As a result of this structural change, the rotary seat (33) is attached to the bearing member (1
In 5), it is rotatably supported via a thrust ring. The arm holder (35) is divided into split nuts.

Further, the introduction tube (34) may be externally fitted to the tube body (44). Further, the joint surface between the introduction cylinder (34) and the tubular body (44) may be formed into a tapered surface.

The injection arm (5) includes an arm body (13) and a lid (1).
4) alone, the inside of the arm may be divided into a cleaning liquid passage (20) and a rinsing liquid passage (21), and the point is that both passages (20), (21) are provided in the injection arm (5). The structure is not limited as long as it is separated.

The attachment of the arm holding body (35) to the bearing member (15) can be performed by other fixing means such as press-fitting engagement and screwing, instead of using the screw (40).

(Effect of the Invention) As described above, according to the dishwasher of the present invention, an integrated rotary jet type in which the cleaning liquid passage (20) and the rinsing liquid passage (21) are separated and separated in one arm. In the injection arm (5), when the two passages (20) and (21) are rotatably connected to each other, the rotation seat (33) formed on the bottom wall of the injection arm (5) is sandwiched and the injection is performed. While holding the arm (5), an introducing cylinder (34) is provided on the bottom wall of the partition body (19), and the introducing cylinder (34) is formed into a double cylindrical shape on the tubular body (44) of the bearing member (15). Plug it in,
The passages were connected in a radial surface-bonded manner. As a result, the rotation supporting portions provided corresponding to the passages (20) and (21), that is, the introduction tube (19) and the rotation seat (3).
It is possible to ignore the variation in the mutual positional dimension with 3), and it is possible to reliably prevent water leakage from the joint gap in each rotation support portion. Therefore, the injection arm (5)
In the inside, the cleaning liquid can be prevented from flowing into the rinsing liquid passage (21) and the rinsing liquid from leaking out to the cleaning liquid passage (20), so that both liquids can be reliably separated and fed, and water leakage It has become possible to reduce the loss of liquid supply due to.

In addition, the bearing member (1) of the injection arm (5) is provided via the arm holder (35) provided on the bottom wall of the injection arm (5).
Since the retainer for 5) is carried out, the retainer member is prevented from projecting on the upper surface of the injection arm (5), and the vertical dimension of the injection arm (5) can be reduced, and the cleaning can be performed correspondingly. The effective space for accommodating tableware in the room (3) can be expanded.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 8 show an embodiment of the present invention. FIG. 1 is a vertical sectional view showing a supporting structure of a spraying arm, and FIG. 2 is a conceptual view of a dishwasher. FIG. 3 is a plan view of the injection arm, FIG. 4 is a sectional view taken along line AA in FIG. 3, FIG. 5 is a sectional view taken along line CC in FIG. 3, and FIG. FIG. 3 is a sectional view taken along the line BB in FIG. 3, and FIG. 7 is a plan view in which a part of the tip of the injection arm is cut away. FIG. 8 is a sectional view of an essential part showing a modification of the ejection arm retaining structure. FIG. 9 is a longitudinal sectional view showing a supporting structure of an injection arm applied prior to the present invention. (5) ... Injection arm, (10) ... Cleaning liquid supply passage, (11) ... Rinsing liquid supply passage, (15) ... Bearing member, (19) ... Auxiliary partition, (20) ... Cleaning liquid passage, (21) ... Rinsing liquid passage, (33) ... Rotating seat, (34) ... Introduction cylinder, (35) ... Arm holder, (44) ... Tube.

Claims (1)

[Scope of utility model registration request] 1. A dishwasher in which a bearing member (15) is rotatably supported by a jetting arm (5) which rotates by a jetting reaction force while jetting and supplying a pressurized washing liquid toward the dishware (A). In the bearing member (15), an upper end is opened, and a pipe body (44) extending upward is provided inside the bearing member (15), and the cleaning liquid supply passage (10) and the cleaning liquid supply passage (10) are provided inside the bearing member (15). Two liquid passages (31) communicating with the rinse liquid supply passage (11),
(32) is formed on the outside and inside of the pipe (44), while inside the injection arm (5) two liquids, a cleaning liquid and a rinsing liquid, which extend in the longitudinal direction by the partition (19) are formed. The passages (20) and (21) are separated and formed, and a circular port is formed in the center of the bottom wall of the injection arm (5) so as to communicate with the liquid passage (20) located on the lower side. A rotary seat (33) is formed on the outer peripheral edge of the circular opening, and an introduction tube (34) communicating with the inside of the liquid passage (21) located on the upper side is formed in the center of the bottom wall of the partition (19). It is formed concentrically with the circular port and is formed so as to project downward, and the introduction cylinder (34) is fitted into the pipe body (44) of the bearing member (15) to provide one liquid passage (21) and the pipe body (44). ), The rotary seat (33) is fitted and fixed to the bearing member (15). The arm holding body (35) is held by itself or between the arm holding body (35) and the outer peripheral upper end surface of the bearing member (15), and the other is fixed by fixing the arm holding body (35) and the bearing member (15). The liquid passage (20) and the liquid passage (31) outside the pipe body (44) communicate with each other, and the injection arm (5) is rotatably retained and supported by the bearing member (15). Characteristic dishwasher.