JP5367461B2 - Dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dishwasher wherein the number of gears is reduced to simplify its structure. <P>SOLUTION: In the dishwasher, in a mechanism 40 for linking a first door 5 for opening and closing a first opening 18 and a second door 6 for opening and closing a second opening 19, the rotation radius R1 of the first door 5 centering on a first rotary shaft 25 is smaller than the rotation radius R2 of the second door 6 centering on a second rotary shaft 35. Further, by the pitch diameter P1 of a fan-shaped first gear 45 which is smaller than the pitch diameter P2 of a fan-shaped second gear 46, the height K1 of the opening of the first door 5 is increased. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a dishwasher having left and right rotary doors that open and close in conjunction with each other.

  Conventionally, as a technology in such a field, there is Japanese Utility Model Publication No. 5-9454. The dishwasher described in this publication achieves simultaneous opening and closing of the left and right open / close doors by means of rotation transmission means comprising a gear train. In this rotation transmitting means, one concentric rotating shaft is fixed to one opening / closing door, the other rotating shaft is fixed to the other opening / closing door, and a main gear is attached to each rotating shaft. Below these main gears, two transmission gears meshing with each other are arranged at the front and rear, one main gear meshes with one transmission gear, and the other gear meshes with the other transmission gear. Accordingly, when one of the doors is lifted upward to open the door, the main gear is rotated clockwise, and the transmission gear meshing with the main gear is rotated counterclockwise. The other transmission gear that meshes with the transmission gear rotates clockwise, and the main gear that meshes with the other transmission gear rotates counterclockwise, causing the other rotary door to rotate counterclockwise. The rotation transmission means having such a configuration achieves the interlocking of the left and right doors.

Japanese Utility Model Publication No. 5-9454 JP-A-7-275176 Japanese Utility Model Publication No. 8-299246

  However, the rotation transmission means employed in the above-described conventional dishwasher is composed of a complicated gear mechanism, which increases the number of parts of the gear and deteriorates assembly workability. Moreover, in order to eliminate the rattle of the door and smoothly open and close the door, considering the meshing of gears with complicated structures, it is necessary to assemble the rotation transmission means with high accuracy, resulting in an increase in cost. At the same time, the durability may deteriorate.

  An object of the present invention is to provide a dishwasher in which the number of gears is reduced to simplify the structure.

In the present invention, the housing forming the cleaning chamber is provided with first and second pivotable doors that open and close the first and second openings disposed opposite to each other. In the dishwasher that overlaps so that the first door enters the inside of the second door in the housing when the door is opened,
A first rotating shaft fixed to the side of the first door;
A second rotating shaft fixed to the side of the second door;
A first gear fixed to the first rotating shaft;
A second gear fixed to the second rotating shaft and meshing with the first gear,
The first door and the second door can be opened and closed simultaneously in conjunction with each other,
The first gear is characterized in that the pitch circle diameter is smaller than that of the second gear.

  Since this dishwasher only uses two gears as an interlocking mechanism, the structure is extremely simple, the number of parts is small, the assembly workability is good, and the manufacturing cost can be reduced. Furthermore, in the door structure in which the first door enters the inside of the second door and overlaps, the first door that enters inside when the door is opened is located below the second door. Therefore, the height of the opening of the first door becomes lower than the height of the opening of the second door, and there is a risk that it becomes difficult to carry in the tableware from the first door side into the cleaning chamber. However, in the dishwasher according to the present invention, the height of the opening of the first door is increased only by taking measures to make the pitch circle diameter of the first gear smaller than the pitch circle diameter of the second gear. can do.

In addition, it is preferable that the second rotating shaft extends in parallel to the first rotating shaft, and the first door has a smaller radius of rotation than the second door.
Thus, since the first door located inside the housing has a smaller radius of rotation than the second door located outside, the first door and the second door can be easily overlapped. Can be matched. In addition, the shapes of the first door and the second door can be made substantially the same except for a slight difference in width, thereby making the first door and the second door have substantially the same appearance. be able to.

  According to the present invention, the structure can be simplified by reducing the number of gears.

It is a fragmentary sectional view showing one embodiment of a dishwasher concerning the present invention. It is a fragmentary sectional view which shows the dishwasher of FIG. It is a side view which shows the tableware washing machine of FIG. It is a perspective view which shows the tableware washing machine of FIG. It is a perspective view which shows the door of FIG. It is a front view which shows the interlocking mechanism of a dishwasher. It is a front view which shows the state which opened the door of the tableware washing machine which concerns on the past. It is a front view which shows the meshing state of a 1st gearwheel and a 2nd gearwheel. It is a front view which shows the state which opened the door of the dishwasher which concerns on this invention.

  Hereinafter, a preferred embodiment of a dishwasher according to the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 1 to 4, the dishwasher 1 includes a washing machine main body 2 having a stainless steel casing and a stainless steel door for opening and closing a washing chamber S formed in the washing machine main body 2. 5 and 6. This dishwasher 1 is a so-called simultaneous door open type, and can be opened and closed simultaneously by interlocking the left and right doors 5 and 6. In the dishwasher 1, the dishes arranged in the tray can be carried into and out of the washing room S with the left and right doors 5 and 6 being opened.

  The cleaning machine main body 2 includes a first housing 3 that is positioned on the lower side and surrounds the machine room, and a second housing 4 that is positioned on the upper side and forms the cleaning chamber S. This machine room accommodates a cleaning pump, a rinsing pump, a rinsing hot water storage tank, and the like (all not shown). The machine room 3 is supported by four legs 3a. A tank portion 7 that forms a part of the cleaning chamber S is provided in the upper portion of the first housing 3, and a cleaning tank 8 for storing cleaning water is provided in the lower portion of the tank portion 7.

  Inside the tank portion 7, a lower washing nozzle 9 having three arms extending radially and a lower rinsing nozzle 10 having two arms extending in a straight line are rotatably arranged on the same axis. ing. The lower cleaning nozzle 9 and the lower rinsing nozzle 10 are connected to a cleaning tank 8 and a rinsing hot water storage tank (not shown) via a double-structured pipe 11.

  An upper cleaning nozzle 12 having three arms extending radially and an upper rinsing nozzle 13 having two arms extending in a straight line are rotatably disposed on the same axis at the upper portion of the cleaning chamber S. ing. The upper cleaning nozzle 12 and the upper rinsing nozzle 13 are connected to the cleaning tank 8 and the rinsing hot water storage tank via a pipe 14 having a double structure. With such a two-stage upper and lower nozzle configuration, high cleaning efficiency and rinsing efficiency for the dishes in the cleaning chamber S can be obtained.

  The substantially gate-shaped second housing 4 includes a pair of side panels 15 and 16 and a top plate 17 that connects the upper ends of the side panels 15 and 16. Rectangular openings 18 and 19 are formed on the left and right sides of the second housing 4, and the openings 18 and 19 are opened and closed by substantially hood-like doors 5 and 6.

  As shown in FIGS. 1 to 5, the door 5 is a so-called round door that rotates freely through the opening 18. The door 5 is formed in a substantially hood shape by a main surface 21 provided with a handle 20 and a pair of side surfaces 22 and 23.

  A plate-like first connecting portion 24 protruding to the opposite side of the main surface 21 is fixed to the back side of the one side surface 22. One end of a first rotary shaft 25 that allows the door 5 to rotate is fixed to the first connecting portion 24 via a screw, and the other end side of the first rotary shaft 25 is connected to the side panel 15. It penetrates and is fixed to the gear 45.

  In addition, a plate-like third connecting portion 28 protruding to the opposite side of the main surface 21 is fixed to the back side of the other side surface 23. The third connecting portion 28 is formed with a shaft hole for rotatably supporting one end of a third rotating shaft (not shown) that allows the door 5 to rotate. The other end of the third rotation shaft is fixed to the side panel 16.

  In addition, a protrusion 26 having an L-shaped cross section for preventing the washing water from leaking from the gap between the door 5 and the side panel 15 is fixed to the side surface 22. The protrusion 26 is a stainless steel member and is fixed to the door 5 by welding. The projecting portion 26 formed in a substantially square shape in the longitudinal direction has an upper projecting portion 26a that extends along the vertical direction when the door is closed, and extends from the lower end of the upper projecting portion 26a toward the back side of the door 5. And a lower protrusion 26b extending obliquely downward. The lower projection 26b is arranged such that the lower end thereof enters the second housing 4 when the door is opened. The cleaning water adhering to the protrusion 26 at the time of cleaning flows down along the lower protrusion 26 b and then falls from the lower end to the tank portion 7 at a position away from the opening 18.

  Also, a resin stopper 27 is provided at the approximate center of the side surface 22 of the door 5 to prevent the door from opening too much by contacting the end of the door 6 when the door is opened. The side surface 23 is also provided with similar protrusions and stoppers (not shown).

  The door 6 is a round door having the same configuration as the door 5. The door 6 is formed in a substantially hood shape by a main surface 31 provided with a handle 30 and a pair of side surfaces 32 and 33. On the back side of one side surface 32, a plate-like second connecting portion 34 protruding to the opposite side of the main surface 31 is fixed. One end of a second rotating shaft 35 that enables the door 6 to rotate is fixed to the second connecting portion 34 via a screw, and the other end side of the second rotating shaft 35 is connected to the side panel 15. It penetrates and is fixed to the gear 46.

  Further, on the back side of the other side surface 33, a plate-like fourth connecting portion 38 that protrudes on the opposite side to the main surface 31 is provided. A shaft hole for rotatably supporting one end of a fourth rotating shaft (not shown) that allows the door 5 to rotate is formed in the fourth connecting portion 38. The other end of the fourth rotating shaft is fixed to the side panel 16. Further, the side surfaces 32 and 33 of the door 6 are provided with projections (not shown) having the same configuration as the projections 26.

  On the surface of the side panel 15, an interlocking mechanism 40 for opening and closing the doors 5 and 6 simultaneously is disposed. The interlocking mechanism 40 includes an L-shaped first rotating arm 41 that is fixed to the end of the first rotating shaft 25, and a first gear 45 that is fixed to the end of the first rotating arm 41. And an L-shaped second rotating arm 42 fixed to the end of the second rotating shaft 35, and fixed to the end of the second rotating arm 42 and meshed with the first gear 45. And a second gear 46.

  The first turning arm 41 and the upper end of the side panel 15 are connected by a tension spring 43 for biasing the door 5 in the opening direction. Three hook holes 41 a and 15 a are formed side by side at the end of the first rotating arm 41 and the upper end of the side panel 15, and the elasticity of the tension spring 43 is changed by hooking the hooks at both ends of the tension spring 43. The force can be changed as appropriate, whereby the opening / closing force of the doors 5 and 6 can be changed as appropriate.

  Similarly, the second rotating arm 42 and the upper end of the side panel 15 are connected by a tension spring 44 for biasing the door 6 in the opening direction. Three hook holes 42 a and 15 b are formed side by side at the end of the second rotating arm 42 and the upper end of the side panel 15, and the elasticity of the tension spring 44 is changed by hooking the hooks at both ends of the tension spring 44. The force can be changed as appropriate, whereby the opening / closing force of the doors 5 and 6 can be changed as appropriate.

  Further, the first gear 45 fixed to the first rotating shaft 25 and the second gear 46 fixed to the second rotating shaft 35 are engaged with each other, so that the door 5 and the door 6 are interlocked, The doors 5 and 6 are simultaneously opened and closed. Further, the side panel 15 is provided with a door opening / closing detection unit 48 that detects opening / closing of the doors 5 and 6. The door open / close detection unit 48 includes a movable magnet 48 </ b> A attached to the lower end of the second rotating arm 42 and a fixed detector 48 </ b> B attached to the surface of the side panel 15. In the door opening / closing detection unit 48, the magnet 48A is separated from the detector 48B, whereby the open state of the doors 5 and 6 is detected.

  An outer panel (not shown) is attached on the side panel 15 of the second housing 4 so as to cover the interlocking mechanism 40 and the door opening / closing detection unit 48. A substantially gate-shaped inner panel 49 is provided inside the second housing 4 along the second housing 4, and doors 5 and 6 are disposed between the inner panel 49 and the second housing 4. Has been.

  Since such an interlocking mechanism 40 uses only two gears 45 and 46, the structure is extremely simple, the number of parts is small, the assembly workability is good, and the manufacturing cost can be reduced. Yes.

  Furthermore, in order to overlap the first door 5 so as to enter the inside of the second door 6 in the housing 4 when the first and second doors 5 and 6 are opened, as shown in FIG. Thus, with respect to the centerline of the dishwasher 1, the position of the 1st and 2nd rotating shafts 25 and 35 is shifted to the 1st door 5 side which goes inside, and the connection part 24 of the 1st door 5 is put. And the connecting portion 34 of the second door 6 is lengthened. Accordingly, in the handles 20 and 30, the rotation radius R1 of the first door 5 centered on the first rotation shaft 25 is larger than the rotation radius R2 of the second door 6 centered on the second rotation shaft 35. The door 5 and the door 6 can be overlapped with each other.

  Further, since the rotation radius R1 of the first door 5 located inside the housing 4 is smaller than the rotation radius R2 of the second door 6 located outside, the first gear 45 and the second When the gear 46 of the first door 5 has the same pitch circle diameter, the first door 5 has a smaller radius of rotation than the second door 6 as shown in FIG. The height K1 of the opening becomes lower than the height K2 of the opening of the second door 6, and it may be difficult to carry the tray into or out of the cleaning chamber S from the first door 5 side.

  Even if the stopper 27 is not provided, the doors 5 and 6 cannot be opened more than the door 6 hits the upper edge of the opening 19, and thus the opening range of the doors 5 and 6 is limited. The opening cannot simply be increased, and the height of the opening must be increased within the limits.

  Therefore, as shown in FIG. 8, measures are taken to make the pitch circle diameter P 1 of the fan-shaped first gear 45 smaller than the pitch circle diameter P 2 of the fan-shaped second gear 46. That is, if the tooth shape and the arrangement interval of the gears 45 and 46 are substantially the same in order to make the first gear 45 and the second gear 46 mesh smoothly, the gear 46 having a larger diameter is more circumferential. The number of teeth existing within a certain angle is different, and the gear 46 having a larger diameter has a larger number of teeth. For example, within the range of 90 degrees, the number of teeth of the first gear 45 is 6, and the number of teeth of the second gear 46 is 6,5.

  Accordingly, when the teeth mesh with each other and rotate, the rotation angle of the first gear 45 becomes larger than the rotation angle of the second gear 46. Therefore, when the doors 5 and 6 are opened with either of the handles 20 and 30, the door 5 connected to the gear 45 having the smaller pitch circle diameter is connected to the gear 46 having the larger pitch circle diameter. The amount of rotation is larger than that of the door 6, and the height of the opening is increased by that amount, so that an opening height comparable to that of the door 6 located outside can be secured.

  Therefore, as shown in FIG. 9, the pitch circle diameter P1 of the first gear 45 is made smaller than the pitch circle diameter P2 of the fan-shaped second gear 46, and as shown in FIG. The opening height K1 can be increased, whereby the opening height K1 of the first door 5 and the opening height K2 of the second door 6 can be easily aligned. Therefore, it is possible to facilitate the tray loading and unloading operations. In addition, the first door 5 and the second door 6 can have substantially the same external shape except for a slight difference in width. That is, the side surfaces 22 and 23 of the first door 5 and the side surfaces 32 and 33 of the second door 6 have the same shape, and with respect to the main surfaces 21 and 31, the main surface 21 of the first door 5 entering inside. It is possible to suppress the difference only by shortening the width.

  It goes without saying that the present invention is not limited to the embodiment described above. For example, even if the first rotary shaft 25 of the left and right first doors 5 and the second rotary shaft 35 of the second door 6 are offset up and down, the door 5 can enter the door 6. .

  DESCRIPTION OF SYMBOLS 1 ... Dishwasher, 4 ... Housing, 5 ... 1st door, 6 ... 2nd door, 18 ... 1st opening part, 19 ... 2nd opening part, 25 ... 1st rotating shaft, 35 ... Second rotating shaft, 45 ... first gear, 46 ... second gear, S ... cleaning chamber, R1, R2 ... rotational radius, P1, P2 ... pitch circle diameter.

Claims (2)

The housing that forms the cleaning chamber is provided with pivotable first and second doors that open and close the first and second openings disposed opposite to each other, and the first and second doors are attached to the housing. When opened, in the dishwasher overlapping in the housing so that the first door enters inside the second door,
A first rotating shaft fixed to a side portion of the first door;
A second rotating shaft fixed to a side portion of the second door;
A first gear fixed to the first rotating shaft;
A second gear fixed to the second rotating shaft and meshing with the first gear,
The first door and the second door can be simultaneously opened and closed in conjunction with each other,
The dishwasher characterized in that the first gear has a smaller pitch circle diameter than the second gear.   The said 2nd rotating shaft is extended in parallel with respect to the said 1st rotating shaft, The said 1st door has a smaller radius of rotation than the said 2nd door. Dishwasher.

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