CN1306100C - Drum type washing machine - Google Patents

Abstract

Provided is a drum-type washing machine capable of suppressing the concentration of stress caused during drum rotation. In the washing machine, a rear cover 9B is an approximately rectangular member composed of a curved portion on the side of a front side 7A of an opening 7 which is arcuately curved with a curvature approximately equal to a peripheral wall 6A of a drum 6, and a plane portion on the side of a rear side 7B of the opening 7 which is not curved but is formed approximately planar, and the planar portion is formed approximately from the central part of the rear cover 9B to its rear part.

Description

front load washing machine

technical field

The present invention relates to a drum type washing machine for washing laundry in a drum.

Background technique

There is known a drum-type washing machine in which laundry is accommodated inside a substantially cylindrical drum rotatable about an axis extending substantially in the horizontal direction, and laundry is performed. This type of washing machine has, for example, an outer tank surrounding the outer side of the drum, and a predetermined amount of water is stored in the outer tank, and the drum is rotated, whereby the water in the drum is blocked by a stopper protruding from the inner surface of the drum. The laundry is lifted to make it fall naturally toward the water surface from a certain height, and this action (patting washing) is repeated, so that laundry can be realized.

This drum-type washing machine includes an opening for taking in and out laundry on its peripheral surface (for example, refer to Patent Document 1). Viewed from a plane, the opening is substantially rectangular, and its long side extends along the circumference of the drum. The opening can be opened and closed by, for example, two covers (a front cover and a rear cover) arranged in line in the circumferential direction of the drum. The front end portion of the front cover is rotatably mounted on the front end portion of the opening on the peripheral surface of the drum in a rotatable manner through a hinge. On the other hand, the rear end portion of the rear cover is rotatably mounted on the rear end edge portion of the opening on the peripheral surface of the drum in a manner to be rotatable by a hinge. By rotating each cover to the outside, the opening of the drum can be opened to a greater extent.

The front cover and the rear cover are respectively curved according to substantially the same curvature as that of the peripheral surface of the drum. If the front cover and the rear cover are closed, the outer circumference of each cover is in a state along the circumferential direction of the drum, and the hooks formed at the rear end of the front cover are locked with the snap holes formed at the front end of the rear cover.

Patent Document 1

Japanese Invention Patent Application Publication No. 2003-103095

However, when the drum of the cover having the above-mentioned structure is rotated, there is a problem that stress concentration occurs in the vicinity of the mounting position of the hinge of each cover. In particular, when the drum is rotated at a high speed to dehydrate the laundry, there is a risk of stress concentration near the mounting position of the hinge and deformation of the cover.

In addition, if the drum is rotated at a high speed, there is a risk of stress concentration at the hooks of the front cover and the snap holes of the rear cover, and deformation of the hooks and the snap holes.

Contents of the invention

The present invention has been made against such a background, and an object of the present invention is to provide a drum-type washing machine capable of suppressing stress concentration generated when the drum rotates.

Furthermore, an object of the present invention is to provide a drum type washing machine in which deformation is hardly generated even when stress is applied, and the lid can be surely closed.

The invention described in claim 1 for achieving the above object relates to a front-loading washing machine including a drum having a peripheral panel and left and right side panels that close both sides of the peripheral panel. Each central portion rotates for a rotation axis, wherein in the drum, in the peripheral panel, an opening is formed to allow laundry to enter and exit the interior of the drum, the opening is formed by a pair of sides, a front and a rear, the pair of sides Extending in the circumferential direction near the left and right sides of the peripheral panel, the front side is located at the front side of the peripheral panel in the rotation direction, the rear side is located at the rear side of the peripheral panel in the rotation direction, the opening has a first cover, and its rear part is hinged On the rear side, the front part is a free end, rotates around the hinge, and opens toward the outside of the drum; the second cover, the front part of the second cover is hinged on the front side, and the rear part is a free end, with a hinge Rotate for the center and open towards the outside of the drum;

The above-mentioned first cover is longer than the second cover along the circumferential direction of the drum, and the first cover forms a cover covering most of the opening, from the free end side of the side opposite to the hinged side, toward the rear, along the The circumferential direction is curved in an arc shape according to substantially the same curvature as that of the peripheral panel, but is substantially planar from the middle part to the hinged rear part.

According to this aspect, the stress generated by the centrifugal force of the high-speed rotation of the drum can be dispersed without being concentrated on a part of the first cover. By thus dispersing the stress acting on the first cover, deformation of the first cover during high-speed rotation of the drum can be prevented.

The invention described in Claim 2 relates to the drum-type washing machine 1 described in Claim 1, wherein the peripheral panel of the above-mentioned drum has a predetermined inner and outer diameter; The rear side of the fixed area forms a height difference from the rear toward the side of the hinged fixed area, and the circumferential panel is one section lower. The height difference is formed from the hinged fixed area formed along the rear edge of the above-mentioned opening. s position.

According to this solution, since the height difference is set at a position close to the rear of the hinged fixing area by a certain size, the stress concentrated on the hinged fixing area can be shifted toward the rear of the hinged fixing area when the drum rotates at a high speed. Thus, it is possible to prevent a situation where the hinge fixing area, on which the hinge member is mounted, is deformed.

The invention described in claim 3 relates to the front-loading washing machine described in claim 1, wherein the peripheral panel of the above-mentioned drum has a predetermined inner and outer diameter, and a hinge-fixed region is formed along the rear edge of the above-mentioned opening, where a hinge is fixed. The rear side of the area forms a height difference from the rear toward the side of the hinged fixed area, and the circumferential panel is one step lower. Standing height difference.

According to this aspect, since the height difference gradually rises toward the rear from the rear side of the hinged fixing area is provided, stress concentration in the hinged fixing area can be dispersed. Thus, it is possible to prevent deformation of the hinge fixing area on which the hinge member is mounted.

The invention according to claim 4 relates to the front-loading washing machine according to claim 2 or 3, wherein the hinge fixed to the hinged fixing region of the opening is in a state of sandwiching the hinged fixing region from the outer side and the inner side of the peripheral panel of the drum. , fixed at this hinged fixed area.

According to this aspect, by fixing the hinge member to the hinge fixing region in a clamping manner, the hinge member can be securely fixed to the hinge fixing region.

The invention described in Claim 5 relates to the front-loading-type washing machine described in Claim 4, wherein on the inner surface of the peripheral panel of the drum, at least the edge portion of the hinge fixed in a state of sandwiching the hinge fixing region is covered. way, with a stopper installed.

According to this aspect, since the end edge of the hinge can be covered by the stopper, it is possible to prevent clothes or the like from being caught on the edge of the hinge when washing or drying.

The invention according to claim 6 relates to a front-loading washing machine including a drum having a peripheral panel and left and right side panels that close both sides of the peripheral panel, and the central parts of the left and right side panels are used as rotation axes. center, wherein in the drum, in the peripheral panel, an opening is formed to allow the laundry to enter and exit the interior of the drum, the opening is formed by a pair of sides, a front and a rear, and the pair of sides are close in the peripheral panel The positions on the left and right sides extend along the circumferential direction, the front side is located at the front side of the circumferential panel in the direction of rotation, the rear side is located at the rear side of the circumferential panel in the direction of rotation, the opening has a first cover, the rear part of which is hinged to the rear side, and the front part The free end rotates around the hinge and opens toward the outside of the drum; the second cover, the front part of the second cover is hinged on the front side, and the rear part is a free end that rotates around the hinge and faces The outside of the drum is opened, and at the free end of the above-mentioned first cover, a hook or a hasp hole erected towards the outside is provided, and at the free end of the above-mentioned second cover, a free end that can be connected with the above-mentioned first cover The hook on the top, or the buckle hole of the buckle, or the hook that stands upright toward the outside, when the first cover and the second cover are closed, the free end of the first cover and the free end of the second cover coincide, and the above Hook and hasp hole snap, both covers are kept closed, said hasp hole is a laterally longer hole extending in the width direction of the cover, forming the side of the hasp hole, the middle of the side of the free end side The portion bends, or bends, away from the free end.

According to this aspect, since the end of the hook does not contact the end of the snap hole, it is possible to prevent stress from concentrating on the end of the hook and the end of the snap hole due to the centrifugal force of the high-speed rotation of the drum. Thus, it is possible to prevent deformation of the end of the hook and the end of the snap hole due to stress concentration.

The invention according to claim 7 relates to a front-loading washing machine including a drum having a peripheral panel and left and right side panels that close both sides of the peripheral panel, and the central parts of the left and right side panels serve as rotation axes. center, wherein in the drum, in the peripheral panel, an opening is formed to allow the laundry to enter and exit the interior of the drum, the opening is formed by a pair of sides, a front and a rear, and the pair of sides are close in the peripheral panel The positions on the left and right sides extend along the circumferential direction, the front side is located at the front side of the circumferential panel in the direction of rotation, the rear side is located at the rear side of the circumferential panel in the direction of rotation, the opening has a first cover, the rear part of which is hinged to the rear side, and the front part The free end rotates around the hinge and opens toward the outside of the drum; the second cover, the front part of the second cover is hinged on the front side, and the rear part is a free end that rotates around the hinge and faces The outside of the drum is opened, and at the free end of the above-mentioned first cover, a hook or a hasp hole erected towards the outside is provided, and at the free end of the above-mentioned second cover, a free end that can be connected with the above-mentioned first cover The hook on the top, or the buckle hole of the buckle, or the hook that stands upright toward the outside, when the first cover and the second cover are closed, the free end of the first cover and the free end of the second cover coincide, and the above The hook and the hasp hole are buckled, and the two covers are kept in a closed state. The above-mentioned hook is a horizontally longer hook extending along the width direction of the cover.

According to this aspect, since the end of the hook and the end of the snap hole do not contact, the stress generated by the centrifugal force of the high-speed rotation of the drum can be prevented from concentrating on the end of the hook and the end of the snap hole. Thus, it is possible to prevent deformation of the end of the hook and the end of the hasp hole due to stress concentration.

The invention according to claim 8 relates to the front-loading washing machine according to claim 6 or 7, wherein the hook is formed by a hook piece attached to the second cover.

According to this aspect, even when the stress is concentrated on the hook, the hook piece is deformed, so that the deformation of the second cover itself can be prevented.

The invention according to claim 9 relates to the front-loading-type washing machine according to claim 6 or 7, wherein the snap hole is formed to pass through the first cover and the reinforcing plate attached to the first cover.

According to this aspect, since the snap hole is formed so as to penetrate through the reinforcing plate and the first cover, the strength of the peripheral portion of the snap hole can be further increased. Thus, deformation of the peripheral portion of the snap hole can be more effectively prevented.

Description of drawings

Figure 1 is a longitudinal sectional view of a drum-type washing machine;

2 is a perspective view showing the structure of the drum with the front cover and the rear cover closed;

3 is a perspective view showing the structure of the drum with the front cover and the rear cover opened;

4 is a perspective view showing the structure of the back cover;

Fig. 5 is a sectional view schematically showing the structure in the vicinity of the drum cover;

Fig. 6 is a perspective view showing a part of the drum;

Fig. 7 is a perspective view showing the installation form of the hinge parts;

Fig. 8 is a cross-sectional view showing the connection state of the hook piece and the reinforcing plate;

Figure 9 is a top view showing the hook piece;

Figure 10 is a front view of the hook piece viewed from the hook side;

Figure 11 is a top view of the stiffener.

Detailed ways

An embodiment of the present invention will be specifically described below with reference to the accompanying drawings.

FIG. 1 is a longitudinal cross-sectional view of a front-loading washing machine 1 , showing a cross-section taken along a vertical plane along the front-rear direction as viewed from the right side.

The outer shape of the drum-type washing machine 1 is divided by a substantially rectangular parallelepiped casing 2 . On the near side of the top surface 2A in the housing 2, an inclined surface 2B is formed that is inclined so as to decrease toward the near side. An opening 3 that can be opened and closed by an outer cover not shown in the figure.

Inside the casing 2, an outer tank 4 is provided so that the axis thereof extends substantially horizontally in the left and right directions. Both ends of the outer tank 4 are closed, and the outer tank 4 has a substantially cylindrical shape. The bottom of the peripheral wall 4A of the outer tank 4 is supported by a plurality of dampers 5 . Inside the outer tank 4, a drum 6 is provided for receiving laundry therein. The drum 6 has a substantially cylindrical shape with both ends closed, is provided so that its axis extends substantially horizontally in the left and right directions, and is rotatably provided inside the outer tank 4 .

Opening 7 for taking laundry in and out is formed in peripheral wall 6A of drum 6 . In addition, an opening 8 is formed in the peripheral surface wall 4A of the outer tank 4 at a position facing the opening 3 of the housing 2 . The opening 7 of the drum 6 can be opened and closed through the outer rotatable drum cover 9 , on the other hand, the opening 8 of the outer tank 4 can be opened and closed through the outer rotatable middle cover 10 . By all opening the outer cover (not shown) of the housing 2, the middle cover 10 of the outer tank 4 and the drum cover 9 of the drum 6, relative to the drum 6, the laundry can be fed in and out.

The middle cover 10 is a component with a substantially arc-shaped cross section, and its rear end is rotatably mounted on the peripheral wall 4A of the outer tank 4 . In the state where the inner cover 10 is closed, the front end portion of the inner cover 10 is engaged with the peripheral wall 4A of the outer tank 4, and the opening 8 is sealed in a waterproof manner.

The opening 7 is substantially rectangular in plan view, and is formed such that its long sides extend along the circumferential direction of the drum 6 . The drum cover 9 for opening and closing the opening 7 is composed of a front cover 9A and a rear cover 9B. The front cover 9A is rotatably attached to the peripheral wall 6A of the drum 6 so as to extend along the front edge of the opening 7 . On the other hand, the rear cover 9B is rotatably attached to the peripheral wall 6A of the drum 6 so that the rear end thereof extends along the rear side of the opening 7 . The opening 7 is closed by the snap between the rear end portion of the front cover 9A and the front end portion of the rear cover 9B.

The front part of the front cover 9A and the rear part of the rear cover 9B are connected by, for example, a rod-shaped connecting member 11, and if one of the front cover 9A and the rear cover 9B is rotated, the other cover will also rotate along with this movement. .

In the middle of the left and right end surfaces of the drum 6 , a rotating shaft 12 is installed respectively, and the rotating shaft 12 extends along the axis of the drum 6 . The rotating shaft 12 is rotatably installed on the left and right end surfaces of the outer tank 4 . On this rotating shaft 12, according to, for example, DD (direct drive) mode, is connected with the electric motor (not shown in the drawing) of drum driving, by rotating and driving this electric motor for driving drum, the drum 6 connected with rotating shaft 12 rotates around the axis. .

Inside the washing machine, water supplied from a water supply facility is supplied to the inside of the outer tub 4 through a water supply pipe 13 connected to the rear end portion of the peripheral wall 4A of the outer tub 4 . At the bottom of the peripheral wall 4A of the outer tank 4, a drain port 14 is formed, and water is supplied with a drain valve (not shown) connected to the drain port 14 closed, whereby water can be stored in the outer tank. 4 interior.

A plurality of water passage holes (not shown) are formed in the peripheral wall 6A of the drum 6, and the water supplied to the inside of the outer tank 4 can flow into the inside of the drum 6 through the water passage holes. In addition, on the inner surface of the peripheral wall 6A of the drum 6, when the drum 6 rotates, the stoppers 15 for lifting the laundry in the drum 6 are spaced apart at a certain angle (for example, according to 120°) along the circumferential direction. spaced apart, a total of 3), protruding in a manner extending in the left and right directions respectively.

During washing, the laundry in the drum 6 is lifted up by the stopper 15 with the rotation of the drum 6 repeatedly, and falls naturally from a certain height (turning over), thus, the laundry is patted and stored in the outer tank. 4. The water surface of the inner water realizes the so-called patting washing.

In addition, the water stored in the outer tank 4 is drained out of the washing machine through the drain pipe 16 connected to the drain port 14 by opening the drain valve.

During dehydration, the drum 6 is rotated at high speed, and the water contained in the laundry inside the drum 6 is squeezed out by centrifugal force. In addition, the water squeezed out of the laundry passes through the water hole, scatters to the side of the outer tank 4, passes through the drain port 14, and is discharged out of the washing machine.

The drum-type washing machine 1 also has a function of drying dehydrated laundry. That is, after dehydration, hot air is blown from a drier (not shown) to the inside of the outer tank 4 (the inside of the drum 6 ) and the drum 6 is rotated, thereby drying the laundry.

2 and 3 are perspective views showing the structure of the drum 6 . In the peripheral wall 6A of the drum 6 , an opening 7 is formed, and the opening 7 can be opened and closed by a drum cover 9 . The opening 7 includes a front side 7A located on the front side in the rotation direction A1 of the drum 6; a rear side 7B located on the rear side in the rotation direction A1 of the drum 6; and a pair of side sides on the left and right sides. , extending along the circumferential direction, basically rectangular in plan view. In addition, the opening 7 is not limited to a substantially rectangular shape, but may be, for example, a square shape.

The length of the front cover 9A of the drum cover 9 is along the circumferential direction of the cylinder 6, less than the rear cover 9B, its front part is hinged on the front edge 7A of the opening 7 by the hinge part 18, and the rear part forms a free end, which can be centered on the hinge part 18. rotate. The length of the rear cover 9B is longer than that of the front cover 9A along the circumferential direction of the drum 6 and constitutes a cover covering more than half of the opening 7 . The rear part of the rear cover 9B is hinged on the rear edge 7B of the opening 7 through the hinge part 19 , and the front part forms a free end, which can rotate around the hinge part 19 .

A hook piece 21 is provided on the top surface of the rear portion of the front cover 9A. The hook piece 21 includes a pair of hooks 20 protruding upward and inclined toward the rotation direction A1 side of the drum 6 . The pair of hooks 20 are erected so as to be aligned with the width direction of the back cover 9B. In addition, two snap holes 22 arranged side by side in the width direction are formed in the front portion of the rear cover 9B. In addition, a reinforcing plate 24 having two snap holes 23 overlapping the snap holes 22 is attached to the bottom surface of the front portion of the rear cover 9B (not shown in FIG. 2 ). The hook 20 and the snap holes 22 and 23 respectively extend in a longer dimension along the width direction. In addition, the hook 20 may be a type in which a part of the front cover 9A protrudes. Not limited to the structure having the reinforcing plate 24, the hook 20 may also be formed in such a manner as to directly snap into a snap hole formed in the back cover 9B. In addition, it is also possible to use only the rear cover 9B as one cover.

The hook piece 21 and the reinforcing plate 24 are formed to be mounted on the front cover 9A and the rear cover 9B, so by making the hook piece 21 and the reinforcing plate 24 thick, the components of the front cover 9A and the rear cover 9B are not changed. Thickly, the strength of the hook 20 and the snap hole 23 can be increased. Thus, the connecting force of the connection between the front cover 9A and the rear cover 9B can be enhanced, and even if the hook piece 21 and the reinforcing plate 24 are damaged, the original hook piece 21 and the reinforcing plate 24 can be replaced only by replacing the hook piece 21 and the reinforcing plate 24. status.

The opening 7 is closed so that the front cover 9A is on the bottom, the rear cover 9B is on the top, and a part of them overlaps up and down. At this time, the two hooks 20 of the hook piece 21 provided on the front cover 9A are engaged with the snap holes 23 of the reinforcing plate 24, whereby the opening 7 is closed. In addition, the front cover 9A and the rear cover 9B are pressed so as to be pushed into the inside of the drum 6, whereby the hook 20 and the snap hole 23 are released, and the rear cover 9B rotates to the drum with the hinge member 19 as the center. 6, the front cover 9A is rotated to the outside of the drum 6 around the hinge member 18, thereby opening the opening 7 (see FIG. 3 ).

In addition, the front cover 9A may also be a swing plate (a swing plate with a hook 20), and the length of the cylinder 6 in the front cover is extremely short in the circumferential direction. Compared with the function as a cover, the opening and closing of the rear cover 9B is realized. At this time, the buckle of the buckle hole 23 and the hook 20 of the back cover 9B can be released, or the mode of realizing the buckle between them can be swung around the front edge 7A of the opening 7 .

FIG. 4 is a perspective view specifically showing the structure of rear cover 9B, and FIG. 5 is a cross-sectional view schematically showing the structure of drum cover 9 and its vicinity.

The rear cover 9B is a substantially rectangular member when viewed from a plane, and is composed of a curved portion 33 on the front side 7A side of the opening 7 and a flat portion 34 on the rear side 7B side of the opening 7. The surface wall 6A has substantially the same curvature and is curved in an arc shape, and the flat surface portion 34 is not curved but is substantially flat. Preferably, the plane portion 34 extends from the substantially middle portion of the rear cover 9B to the rear. In addition, on the back cover 9B, a plurality of uneven lines extending in the circumferential direction of the back cover 9B and juxtaposed in the width direction of the back cover 9B are formed. Since the back cover 9B has the concave-convex lines, the strength against stress and the like can be enhanced.

In the past, the entire rear cover 9B was curved in an arc shape. As a result of analysis, it was confirmed that the stress generated by the centrifugal force caused by the high-speed rotation of the drum 6 was concentrated near the hinge part of the rear cover 9B, and a so-called metal warp was generated. possibility of fatigue. According to the present invention, since the back cover 9B has the flat portion 34, the stress generated by the centrifugal force caused by the high-speed rotation of the drum 6 is not concentrated near the hinge portion of the back cover 9B, but dispersed. Since the stress concentrated in the vicinity of the hinge member is dispersed, deformation in the vicinity of the hinge member during high-speed rotation of the drum 6 can be prevented.

In addition, the rear cover 9B has a shape including the flat portion 34 and the curved portion 34, so the flat portion 34 is not limited to extending from the substantially middle portion of the rear cover 9B to the rear, and may also extend from the front side to the rear. The form of the rear part can also be a form extending from the rear side to the rear part. In addition, the planar portion 34 may be of a slightly curved shape including a curved surface curved with a curvature smaller than that of the curved portion 33 . The above-mentioned shape can also be used for the front cover 9A.

FIG. 6 is a perspective view showing a part of the drum 6 . The rear part of the opening 7 immediately behind the rear edge 7B constitutes a hinged fixing area 31 for mounting the hinge parts 18 and 19, and the peripheral wall 6A of the drum 6 is partially concave in the hinged fixing area 31. More specifically, the hinged fixing area 31 is formed in a lower section, and on the outer peripheral surface of the peripheral surface wall 6A, it is formed from the rear toward the side of the hinged fixing area 31. side, slowly erect towards the rear) inclined surface 6B. By forming the hinged fixing area 31 at a lower level like this, in the closed state of the back cover 9B mounted on the hinged fixing area 31 through the hinge parts 18 and 19, the outer surface (top surface) of the back cover 9B and the peripheral wall The outer peripheral surfaces of 6A are basically on the same plane.

As shown by the dotted line in Fig. 6, when the peripheral surface wall 6A is in the immediately rear of the hinged fixed area 31 and is substantially vertically concave, there is a stress concentration on the hinged fixed area 31, and when the drum 6 rotates at a high speed, etc. In this case, there is a risk of deformation of the hinged fixing area 31 . In this embodiment, since the hinge fixing region 31 and the outer peripheral surface of the peripheral wall 6A are connected by the inclined surface 6B, the stress concentration of the hinge fixing region 31 can be dispersed. Thus, the hinge fixing area 31, or the hinge members 18 and 19 mounted on the hinge fixing area 31, can be prevented from being deformed.

According to the height difference formed on the peripheral wall 6A from the rear toward the side of the hinged fixing area 31 , the height difference formed on the peripheral wall 6A may also be set at a position close to the rear of a certain size from the hinged fixing area 31 . According to this solution, when the drum 6 rotates at a high speed, the stress concentrated on the hinged fixing area 31 can be shifted to the rear of the hinged fixing area 31 . Thus, the hinge fixing area 31, or the hinge members 18 and 19 mounted on the hinge fixing area 31, can be prevented from being deformed. In this case, the surface constituting the height difference is not limited to the gentle slope 6B as in the above-mentioned embodiment, and may be a steep slope or a surface standing substantially vertically, for example.

It is not limited to the scheme of setting the inclined surface 6B behind the rear edge 7B of the opening 7, it can also be formed by setting the inclined surface 6B in front of the front edge 7A of the opening 7, or it can also be formed according to the rear of the rear edge 7B of the opening 7. The inclined surface 6B is provided on both the front side and the front side 7A.

The inclined surface 6B is not limited to being formed of a flat surface as in the present embodiment, but may be formed of, for example, a curved surface.

FIG. 7 is a perspective view showing how the hinge members 18 and 19 are mounted. The hinge parts 18 and 19 are such that the front cover 9A and the rear cover 9B are hinged on the drum 6, and the front cover 9A and the rear cover 9B rotate around one end thereof. The hinge members 18 and 19 are also provided with, for example, first hinge members 18A and 19A formed by bending metal plates. The first hinges 18A and 19A include an outer fixing surface 28 and an inner fixing surface 29 formed by folding back metal plates, which are substantially parallel to each other, and the folded-back portion constitutes a substantially cylindrically bent pin holding portion 27 . The pin holding portion 27 is formed with notches at regular intervals. In addition, the end portion of the outer fixing surface 28 is substantially cylindrically bent to form a bent end portion 30 .

According to the mode that the outer fixed surface 28 constitutes the outside of the drum 6, the peripheral surface wall 6A of the drum 6 is clamped by the outer fixed surface 28 and the inner fixed surface 29, and then, using rivets or the like, the first hinge members 18A and 19A are stacked. It is fixed on the peripheral wall 6A. Since the first hinges 18A and 19A include a structure in which the peripheral wall 6A of the drum 6 is clamped by the fixing surface 28 and the inner fixing surface 29, the first hinges 18A and 19A can be firmly fixed on the drum 6.

The hinge 19 is provided with a second hinge 35 fixed to the rear end of the rear cover 9B (see FIG. 4 ). Like the first hinge 19A, the second hinge 35 has a clamping structure formed by bending a metal plate, and a substantially cylindrically bent pin holding portion 36 is provided in the bent portion. In this pin holding portion 36 , a portion other than the position corresponding to the notch portion of the pin holding portion 27 of the first hinge 19A is notched. The pin holding portion 27 of the first hinge 19A and the pin holding portion 36 of the second hinge 35 are provided so as to be inserted into mutual notches, and the respective pin holding portions 27 and 36 are connected to each other in the left-right direction. By inserting cylindrical pins into the pin holding portions 27 and 36, the rear cover 9B is attached to the first hinge 19A so as to be rotatable around the pins.

It is also possible to adopt a structure in which the stopper 15 covers the region from the end edge of the inner fixing surface 29 to the middle part as indicated by the dotted line. According to this configuration, it is possible to prevent the clothes or the like from being caught on the edge portion of the inner fixing surface 29 when washing or drying the clothes.

FIG. 8 is a cross-sectional view specifically showing the connection state of the hook piece 21 and the reinforcing plate 24 . At the front end of the hook piece 21 provided on the top surface of the front cover 9A, there is a hook 20 protruding upward and inclined toward the rotation direction A1 side of the drum 6 . In addition, a snap hole 22 is provided on the front portion of the rear cover 9B. In addition, a cover member 32 made of resin to cover the rear cover 9B is provided at a front end middle portion of the top surface of the rear cover 9B. The reinforcing plate 24 is provided on the bottom surface of the back cover 9B in such a manner that the buckle holes 23 thereof overlap with the buckle holes 22 of the back cover 9B. If the front cover 9A and the rear cover 9B are overlapped in such a way that the front cover 9A is at the bottom and the rear cover 9B is on the top, then by making the hook 20 of the hook piece 21 arranged on the front cover 9A according to the hasp passing through the reinforcing plate 24 The way of the hole 23 is fastened, and the hook piece 21 and the reinforcing plate 24 are connected.

FIG. 9 is a top view of the hook piece 21 , and FIG. 10 is a front view of the hook piece 21 viewed from the side of the hook 20 . The hook piece 21 is formed of a plate-shaped member, and has a pair of hooks 20 protruding upward on the free end side of the front cover 9A. The hook 20 has a shape having a protruding portion 20A in which the middle portion is bowed and bulged in a direction away from the free end of the front cover 9A.

One (right side) of the hooks 20 has an inclined shape in which the inner end protrudes from the outer end in the portion protruding upward. In addition, the other (left side) of the hooks 20 protrudes upward in a herringbone shape, and the highest point of the herringbone portion further protrudes from the highest point of the protruding portion of the other hook 20 .

In addition, as shown by the dotted line, the hook 20 on the left may have an inclined shape in which the inner end protrudes from the outer end. In this case, if the highest point of the protruding part of the hook 20 on the left side protrudes further from the highest point of the protruding part of the other hook 20, then when the connecting hook piece 21 and the reinforcing plate 24 are connected, the hook 20 is easily connected. Hooked in the buckle hole 23 of the reinforcement board 24 .

FIG. 11 is a top view of the reinforcing plate 24 . The reinforcing plate 24 is formed of a plate-shaped member, and has two laterally long snap holes 23 extending in the width direction in the reinforcing plate 24 . The two snap holes 23 each have a substantially rectangular shape and are formed side by side along the width direction of the reinforcing plate 24 .

The snap hole 23 is in the shape of a protruding portion 23A having an intermediate portion of the side of the free end side of the rear cover 9B swelled in an arcuate direction in a direction away from the free end of the rear cover 9B.

In the state where the hook piece 21 and the reinforcing plate 24 are connected, the overhanging portion 20A of the hook 20 is in contact with the overhanging portion 23A of the snap hole 23 .

In the past, the hook 20 and the snap hole 23 were both flat. As a result of analysis, it was confirmed that the stress generated by the centrifugal force of the high-speed rotation of the drum 6 was concentrated on the end of the hook 20. part and the end of the snap hole 23, thereby, the hook 20 and the snap hole 23 generate so-called metal fatigue. According to the present invention, since the end of the hook 20 is not in contact with the end of the hasp hole 23, it can be prevented that the hook 20 and the hasp hole 23 are deformed under the stress caused by the centrifugal force of the high-speed rotation of the drum 6. Condition.

In addition, the shape of the hook 20 is not limited to an arcuately swollen shape, but may be, for example, a shape bent in a direction away from the free end of the front cover 9A. In addition, the shape of the buckle hole 23 is not limited to the shape that the edge of the free end side of the back cover 9B is bowed and bulging in the direction away from the free end of the back cover 9B, and may also be, for example, along the direction away from the free end of the back cover 9B. curved shape.

In addition, the hooks 20 and the snap holes 23 are not limited to being provided two at a time, and may be provided one at a time, or three at a time.

In addition, it is not limited to the scheme that the hook 20 is provided on the side of the front cover 9A, and the hasp hole 23 is provided on the side of the rear cover 9B, and the scheme that the hook 20 is provided on the side of the rear cover 9B, and the hasp hole 23 is provided on the side of the front cover 9A may also be adopted. .

The present invention is not limited to the embodiments described above, and various changes can be made.

Claims (5)

1. A drum-type washing machine, the drum-type washing machine comprising a drum, the drum has a peripheral panel and left and right side panels that close both sides of the peripheral panel, and rotates with the central parts of the left and right side panels as rotation axes, and Features: In the drum, openings are formed in the peripheral panels to allow the laundry to pass in and out of the inside of the drum; The opening is composed of a pair of sides, a front side and a rear side. The pair of side sides extend in the circumferential direction near the left and right sides of the peripheral panel. The rear side of the direction of rotation; The opening has a first cover, the rear part of which is hinged to the rear side, and the front part is a free end, which rotates around the hinge and opens toward the outside of the drum; a second cover, whose front part is hinged to the front side The side and the rear part are free ends, which rotate around the hinge and open toward the outside of the drum; The above-mentioned first cover is longer than the second cover along the circumferential direction of the drum, and the first cover forms a cover covering most of the opening, from the free end side of the side opposite to the hinged side, toward the rear, along the The circumferential direction is curved in an arc shape according to substantially the same curvature as that of the peripheral panel, but is substantially planar from the middle part to the hinged rear part. 2. The drum-type washing machine according to claim 1, characterized in that the peripheral panel of the drum has a specified inner and outer diameter; Along the rear side of the above-mentioned opening, a hinged fixed area is formed with hinged parts, and at the rear side of the hinged fixed area, a height difference is formed in a manner that the circumferential panel is lower by one section from the rear toward the hinged fixed area side; The height difference is formed at a position close to the rear of the hinged fixing area formed along the rear edge of the opening. 3. The drum type washing machine according to claim 1, characterized in that the peripheral panel of the drum has a specified inner and outer diameter; Along the rear side of the above opening, a hinged fixed area is formed with hinged parts, and at the rear side of the hinged fixed area, a height difference is formed in a manner that the circumferential panel is one section lower from the rear toward the hinged fixed area; The height difference is a height difference formed by a slope inclined toward the rear from the rear side of the hinged fixing region formed along the rear edge of the opening. 4. The drum type washing machine according to claim 2 or 3, wherein the hinges fixed to the hinged fixing area of the opening are fixed to the hinged fixing area in a state of sandwiching the hinged fixing area from the outside and inside of the peripheral panel of the drum. The hinge fixes the area. 5. The drum type washing machine according to claim 4, characterized in that, on the inner surface of the peripheral panel of the drum, at least the edge portion of the hinge member fixed in the state of clamping the hinge fixing area is installed on the inner surface of the drum. There are blockers.

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