KR20040068235A - Drum for a linen processing machine with a domed structure directed toward the inside of said drum - Google Patents

Abstract

The invention relates to a drum (1), which is mounted to rotate within the housing of a linen processing machine, preferably a washing machine. Said drum comprises at least one bottom disc (3) as well as a shell (5). Both components are each at least partially made of sheet steel and one of said components or both have a domed structure directed toward the inside of the drum. The aim of said invention is to increase the rigidity of said components (3) and (5), in order to improve the draining capacity thereof and increase the look-and-feel thereof. Said aim is achieved, whereby the domed structure is formed from spherical caps (6) directed toward the inside of said drum.

Description

DRUM FOR A LINEN PROCESSING MACHINE WITH A DOMED STRUCTURE DIRECTED TOWARD THE INSIDE OF SAID DRUM}

Such drums are disclosed in document WO 98/20195. When referring to the publication, the protruding portion is constituted by a plurality of hexagons located at least in close proximity and arranged next to each other. In general, the projecting portion is shown as a drum having a honeycomb structure. The hexagonal edge area has holes at the corner points, and according to document WO 98/20195, the holes should have a diameter of only 2 mm and should not have multiple tulip structures in order to prevent damage to the laundry during the dehydration process. do. Edge areas with a size of 1.5 to 2.5 times the hole diameter should have a width of 3 mm to 5 mm.

The operation of producing a plate of drumshells for use in laundry drums has the problem disclosed in WO 98/20195, supra. Despite the effort of the operator, the centering operation between the protruding portion and the hole pattern formed in the following manufacturing process has a problem, and the width of the edge area should be measured somewhat generously in relation to the tolerance standard. However, this reduces the drainage capacity during the washing process and during the dehydration process the laundry is pulled into the relatively wide edge area. The action of discharging the washing liquid moving in the drum shell area to the hole is changed in the edge area.

In addition, during high-speed centrifugal dehydration, the laundry is pulled through a very small hole. As a result, the user has two problems: laundry damage is not prevented by the small holes and the small holes significantly reduce the washing liquid discharge during the dehydration process.

In addition, the work of constructing the hexagonal projecting portion by the deep drawing method has a problem, that is, the corner regions should be drawn as a baseline region over a long section. As a result, an uneven crystal structure is generated in the plated sheet region, and as a result, the materials have different strengths. The material becomes relatively stronger in the corner region where the holes are to be drilled, so that a relatively thin drill pin is applied more strongly than the drum shell of the prior art without protrusions.

The present invention relates to a drum for a washing machine, in which a drum is rotatably supported in a housing of a washing machine, and at least one base plate and a drum shell are provided, which are at least partially made of sheet metal and provided with a protrusion facing toward the drum.

1 is a perspective view of a laundry drum provided with a protrusion structure on the base plate and the drum shell in accordance with the present invention.

2 is a cross-sectional view showing an embodiment of a drum shell having straight lines and having the shape of a protruding structure of the present invention.

3 is an enlarged cross-sectional view of the projecting arch shape seen along the cutting line III-III of FIG. 2;

Figure 4 is a cross-sectional view showing an embodiment of another form of protrusion structure in accordance with the present invention having a hole molded in a tulip structure and shaped in the form shown in FIG.

FIG. 5 is an enlarged cross-sectional view showing the projecting arch shape along the cutting line VV in FIG. 4; FIG.

Figure 6 is a cross-sectional view of the base plate provided with a protrusion structure of the present invention.

* Symbol description *

1: washing drum 2: shaft

3: base plate 4: stamping part

5: drum shell 6: protrusion

It is an object of the present invention for the drum of the type described at the outset to have elements in which the protruding portion directly borders in the up and down position, holes and sufficient areas are allowed, so that the protruding portion is of sufficient size for sufficient washing liquid guidance. Has a diameter of. In addition, the manufacturing work of the protruding part should not cause problems on its own or on the action of another process. Stiffness that improves the protrusions must be maintained or improved.

For this purpose, according to the present invention, the protruding portion is constituted by a protrusion directed toward the drum, and the edge of the protrusion is formed into a circular or elliptical shape or an oval shape. Thus, a protruding structure similar to the protruding structure and the dome structure is formed, and the protruding portion directly contacts the protruding portions at positions close to the periphery of the protruding portion. Therefore, invasion of laundry to the base of the edge area is prohibited. When manufacturing the protrusions, the deep drawing process is uniform and the drum shell has a uniform structure. Based on the circular structure of the protruding portion, the edge region, which has a large plane and forms an area similar to a rectangle, allows a plurality of regions for a relatively large hole. Therefore, compared with the prior art, the protruding portion can be produced significantly simpler, and inherent tolerances do not have to be maintained when the protruding portions configured for the already manufactured holes are centered.

According to an advantageous embodiment of the invention, the protrusions are arranged in the intersections of the square pattern. The general structure of the protrusions has advantages in aesthetic value, that is, the arrangement of the shaft pattern is matched with the arrangement of the hole patterns, greatly simplifying the manufacturing operation.

According to a particularly advantageous embodiment of the invention, the patterned portions on the drum shell comprise a plurality of triangles bordering each other and having an equilateral structure. Therefore, the manufacturing operation is simplified by the plane of the edge area having a rectangular structure, that is, a triangular structure, with the smallest possible size between the protrusions that do not border each other up and down.

In order to use the structure according to the present invention for various purposes, according to the embodiment of the present invention, the alignment line of the shaft pattern portion follows the shape of the outer edge of the drum shell or the base plate and is configured in a straight line or a circle. The structure can then be best used for a laundry drum with a discoid base plate without the formation of a substantial size plane without protrusions.

According to another embodiment of the present invention for a washing drum of a washing machine, a hole for passing the washing liquid between protrusions on the drum shell surface is arranged at the intersection of the triangular midline. The advantage of the arrangement of the holes in this area is that when the moisture transferred in the area of the drum shell reaches the inner side of the drum shell during the dewatering operation, the moisture in the area where the protrusions contact is moved to the intersection more In, the recesses located between the protrusions are further enlarged to the intersection. In addition, the moisture cannot stay in the narrowest position and can be moved from that position to a wider plane at the intersection.

According to another advantageous embodiment of the present invention, the holes arranged in the intersection of the midline are configured at least in a region similar to a circle, and the periphery of the region forms a circumferential section of the protrusion in the circle. The selected structure thus increases the strength of the drum shell plane.

In the case where the flat hole at the intersection proves to be very dangerous for the laundry, according to another advantageous embodiment of the invention, the hole is provided in the plane of the recess arranged outwardly and the plane is farthest from the drum axis. Located away. The area of the intersection point is large enough to accommodate the tulip, and holes are formed outwardly from the plane of the drum shell through the tulip, in which laundry pressurized against at least the drum shell can reach the tulip. have.

Experience has shown that the minimum distance between protrusions relative to the diameter of the protrusion should be about 1/8 to 1/20. A minimum distance of about 1/10 is found to be very good.

In addition, the height of each protrusion relative to the diameter of the protrusion should be about 1/5 to 1/20. It is confirmed that the height of about 1/12 is very good.

According to an advantageous seal of the invention in the arrangement with the protrusion on the base plate of the drum, the alignment lines have a side line which decreases with the decrease in the circumference of each alignment line with respect to the center line of the base plate with the protrusion structure. Thus a uniform configuration of the protrusions is arranged on the base plate, which is advantageous for the conformity of the protrusion structure and the hole structure.

According to another advantageous embodiment of the invention, it is advantageous when the diameter of the projections and / or the distance between the projections is reduced with decreasing circumference of the arranged alignment line. The advantage of the congruence between the protruding structure and the hole structure is that the protruding structure of the base plate has the advantage, that is, a plurality of elements of various sizes form each resonator for various various audible frequencies exactly on the base plate. They greatly expand the resonance spectrum, and for this the resonance amplitude of the spectrum is significantly reduced.

According to an advantageous embodiment of the present invention, as long as a drum having a laundry moving body configured on the inner side of the drum shell is used, the surface of the laundry moving body has a protrusion structure having protrusions. As a result, it is advantageous when the laundry is mechanically washed in the washing program step.

Embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The washing drum 1 shown in FIG. 1 can be rotated on an axis 2 in at least a horizontal and approximate direction. The washing drum 1 is connected to a driving device not shown in the drawing for the rotational movement. The front side of the washing drum 1 is opened. The washing drum 1 is sealed by the front part which rotates or is supported on the front part of the upright structure. At the rear side (not shown in the figure), the washing drum is fixedly connected to the base plate 3 and a driving moment can be induced in the base plate 3. The base plate 3 has a star-shaped stamp 4, which is only partially shown in the figure and provides stability of the base plate. In addition, the stamping portion may be reinforced at the rear side into a star-shaped portion not casted in the figure. In practice, the laundry drum 1 is formed by a drum shell 5, the drum shell 5 has a plate joint is bent in a cylindrical shape and fixed to each other by a connection line in a position not shown in the figure.

Before the embodiment of the base plate 3 and the drum shell 5 have a protruding structure by a press-in tool before being connected to each other, the protruding structure follows the following description. Whereas the projections 6 have the same size in the drum shell 5, the base plate 3 has the largest projection 8 on the largest alignment line and is stepwise towards the center on all relatively small alignment lines. With projections 9 to 15 of decreasing diameter. As a result, the protrusions 6 of the drum shell 5 and the protrusions 8 to 15 of the base plate 3 are arranged in a triangular structure with each other, as confirmed in the following description.

According to the embodiment of FIG. 2, which relates to a part of the drum shell 5, a projection 6 having a spherical dome structure and a stamping portion formed inside the drum is generally arranged above the intersection of the square shaft portion or the triangle shaft portion. . The shaft portion is determined by the alignment line 16 and the other axes 17 and 18 on both sides, and the alignment line 16 is arranged parallel to the outer edge 19 of the drum shell. Both axes 17, 18 are positioned about 60 ° to the left and about 60 ° to the right relative to the alignment line 16, respectively. All axes are parallel and coincident with each other and have their distance from each other in the up and down positions. By this method a number of equilateral triangles are formed, the equilateral triangles 20 are shown in shade, with the vertices E, F, and G being the intersections of the axes 16, 17, 18 and 18-2 at the same time. The centerlines of the triangles intersect at the midpoint of the triangle, the midpoints being the intersections 22 and regions at the same time, with holes 23 arranged at the midpoints respectively.

According to this arrangement, between the projections 6 the regions 24 of the triangles E, F and G, where the triangles 24 are formed, can be filled between the hole formations and the projection structure. Due to this, the area provides a sufficient plane for constructing a sufficiently large hole 23 without the hole cutting off the perimeter of the projection 6 when the hole is not fully centered. The strength of the drum shell 5 and the base plate 3 is required, and according to the prior art, the peripheral lines of the elements of the projecting structure are cut so that the buckling strength of the drum shell and the base plate at the cutting position is damaged. The process is confirmed from FIG. 3.

According to the investigation, the distance A of the protrusions 6 is preferably about 1/8 to 1/25 or 1/10 of the diameter of the protrusions above and below each other. On the one hand, the height H of the protrusion 6 for forming an optimization in consideration of the best washing effect and on the other hand to increase the suppression of laundry damage in the dehydration process is provided by the above method, i.e., one fifth to one fifth of the diameter of the protrusion. 1/20 or 1/12 is preferred. During the dehydration process, the diameter of the hole is taken into consideration in order to obtain an optimum state in consideration of preventing damage to the laundry. In the illustrated embodiment, the diameter is about 3.5 mm. This value is chosen for good fluid flow and fluid flow is achieved through good drainage between the projections 6.

The embodiment of FIGS. 4 and 5 for the construction of the drum shell 5 takes into account the arrangement and structure of the same holes as the embodiment of FIGS. 2 and 3. This configuration of the hole improves the damage preventing action of the laundry during the dewatering operation. In the triangular region 24 between the projections 6, the holes 25 are arranged in the base plane 26 (FIG. 5) of the outward recess 27 having a tulip shape. The laundry arranged between the projections 6 during the dehydration process is heavy so that the laundry can pass through the holes and penetrate widely in the grooves 27 to reach the projecting elements at the outer edges of the holes. Just reached.

According to the above embodiment, the reason why the protruding structure of the circular, elliptical or oval according to the present invention is advantageous in comparison with the prior art is explained. Without roughly cutting around the periphery of the protruding component 6, the triangular region 24 constructed above the intersections E, F, G provides space for forming a hole 25 of sufficient size and also a hole. Provides space for additional recesses 27 for.

The embodiment of FIG. 6 for the protruding structure shows a cut away from the plate of the base plate 3 (shown in FIG. 1). At the same time, the outer edge 28 of the base plate 3 is the outer boundary of the plane in which the protruding structure can be formed. The inner boundary of the plane is determined by line 29. The base body of the protruding structure and the hole structure corresponds to the base body of FIGS. 2 and 4.

First, the alignment line 30-1 corresponding to the axis 16 of FIG. 2 and the parallel lines 30-2 and 30-3 of the alignment line have concentric axes and are circular in a position parallel to the outer edge 28. do. The other axes 31, 32 are rotated by 60 ° towards the right and left with respect to the alignment line 30-1 and bent relative to the center point, so that the sides of the triangle formed of sides are close to the center point. As it decreases, the circle center point is arranged above the intersection point M of both radial lines R shown. The sidelines K-K of another triangle F, K, L arranged inside are shorter than the sidelines E-F of another triangle E, F, G arranged outside. The same applies to other identical sidelines. The diameter of the protrusion 6 decreases as it approaches the center of gravity point M, and the alignment line 30-2 located therein is shorter than the alignment line 30-1 externally, and the number of protrusions 6 Relatively small distances are used. Thus the reduction of the triangular lateral line and the bending of the axes 31, 32 are explained.

While the drum is rotating, a laundry moving body for raising the laundry is located in the washing drum and is formed in the drum and the surface having the laundry moving body has a corresponding protrusion structure. This configuration is somewhat advantageous for mechanically working laundry.

The invention is not limited to the structure of the axes shown. Another general soccer team may be used for the same purpose. For example, it is advantageous for the axes to have a rectangular or special rectangular arrangement. Next, additional alignment lines are arranged in a rectangular area located between the protrusions, or a mixture of planar or tulip alignment lines is optionally arranged. Various shaft patterns may be mixed and used. Protruding structures of the above type can also be used in laundry drums for laundry dryers.

Claims (14)

A drum for a washing machine in which a drum is rotatably supported in a housing of the washing machine, and at least one base plate 3 and a drum shell 5 provided with at least a part made of sheet metal and provided with a protrusion facing toward the drum ( In 1), The drum of the washing machine, characterized in that the protruding portion is composed of a protruding portion (6) facing the inside of the drum, the edge of the protruding portion is circular, oval or ovoid. The drum as claimed in claim 1, characterized in that the projections (6) are arranged in the intersections (E, F, G) of the square shaft portions (16, 17, 18). 3. Washing drum according to claim 2, characterized in that on the drum shell (5) the shaft pattern portions (16, 17, 18) comprise a plurality of triangles (E-F-G) bordering each other and having an equilateral structure. 4. The drum shell (5) according to claim 2 or 3, wherein the alignment lines (16, 30-1, 30-2, 30-3) of the shaft portions (16, 17, 18 or 30, 31, 32). Or a drum for a washing machine, which follows the shape of the outer side portions 19 and 28 of the base plate 3 and is configured in a straight line or a circle. The hole 23 for passing the wash liquor between the protrusions 6 on the surface of the drum shell 5 for the washing machine or the dryer. 21) A drum for a washing machine, characterized in that it is arranged at the intersection of 21). 6. The hole (23) according to claim 5, wherein the holes (23) arranged at the intersections of the center lines (21) are constituted in at least a circle-like area (24), with the periphery of the area forming a circumferential section of the protrusion (6) inwardly. Washing machine drum, characterized in that. 7. A drum according to claim 6, characterized in that the hole (23) is provided in the plane (26) of the groove (27) arranged outwardly and the plane (26) is located farthest from the drum shaft (2). Drum for washing machine. Drum according to one of the preceding claims, characterized in that the minimum distance (A) between the projections (6) relative to the diameter of the projections is about 1/8 to 1/20. 9. A washing machine drum according to claim 8, wherein said minimum distance (A) is about 1/10. 10. A drum for a washing machine according to claim 8 or 9, characterized in that the height (H) of each projection (6) relative to the diameter of the projection is about 1/5 to 1/20. 11. A drum for a washing machine according to claim 10, wherein the height (H) of the protrusion is about 1/12. The base plate 3 having a protruding structure is formed, and the alignment lines 30-1, 30-2, and 30-3 are aligned with respect to the center line M of the base plate 3. Washing machine drum, characterized in that it has a side line (FK) is reduced with the decrease in the circumference of -1,30-2,30-3. 13. The method according to claim 8 or 9 or 12, characterized in that the diameter of the projections 6 and / or the distance A between the projections is reduced with decreasing circumference of the arranged alignment line 30-2. Drum for washing machine. The washing machine drum according to one of the preceding claims, characterized in that a laundry moving body arranged on the inner side of the drum shell (5) is constructed, and the upper surface of the laundry moving body has a protruding structure of a protrusion.