JPH1147483A - Washing machine fixed to floor surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide such a structure that an outer tank is directly fixed to a housing at a low cost which can resist against vibration of the outer tank. SOLUTION: A U-like member 5 is secured to an outer tank 1 at an obliquely lower position, and the outer tank 1 is secured on pedestals 10 which are arranged left-right symmetrically. Main support panel members 11 and reinforcing support members 12 of the pedestals 10 are fixed to side frame 13 with vertical joint surfaces, and to front frames 14 of rear frames with horizontal joint surfaces by means of rivets. Each time when the outer tank 1 vibrates, forces transmitted to the pedestals 10, are decomposed into horizontal components and vertical components which act upon the rivets in a tensile direction. That is, the forces act in directions in which a high strength is present, thereby it is possible to toughly bear the vibration without damaging the rivets.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum-type fixed-floor washing machine mainly installed in coin laundry stores and various social welfare facilities, and more particularly, to a structure of the fixed-floor washing machine.

[0002]

2. Description of the Related Art Vibration is one of the major problems in large-sized drum-type washing machines installed in coin laundry stores, social welfare facilities such as hospitals and nursing homes, and the like.
If the laundry is unevenly dispersed in the drum, especially during dehydration where the drum rotates at high speed, not only vibration during washing and rinsing, but also very large vibration and large noise are generated. . For this reason, in this type of conventional washing machine, various countermeasures against vibration were taken structurally.

[0003] First, in order to prevent the vibration of the outer tank containing the drum from being transmitted to the housing as much as possible, the outer tank is suspended from the upper part of the housing by an elastic member such as a spring, and the lower part of the outer tank is damped. And is fixed below the housing via the
Thereby, the vibration of the outer tank is attenuated and transmitted to the housing. Further, in order to suppress the vibration itself of the outer tub, a weight is attached to the upper portion, both sides, or the lower portion of the outer tub to increase the weight of the outer tub.

Further, when the washing machine is installed, the bottom plate constituting the casing of the washing machine is directly fixed to a rigid and horizontal floor surface such as concrete with anchor bolts or the like.
Thereby, even if the vibration of the outer tub is transmitted to the housing, the housing of the washing machine is prevented from rattling or moving on the floor.

[0005]

As described above, this type of conventional washing machine requires various additional members for vibration isolation, which increases the cost and the time required for the manufacturing process. Had become. In addition, the weight of the washing machine itself became very heavy, and the transport and installation work was also very hard. For this reason, simplification of the vibration proof structure has been strongly demanded as compared with the related art.

In response to such a problem, the present applicant has made various proposals on a method of suppressing drum vibration during centrifugal dehydration, which causes particularly large vibration (for example, Japanese Patent Application No. 8-334999). . That is, in the novel centrifugal dehydrator, for example, the laundry is stretched on the inner peripheral wall of the drum by rotating the drum at a rotational speed at which the centrifugal force acting on the laundry in the drum is slightly larger than the gravity. So that it rotates. At this time, the eccentric load caused by the uneven distribution of the laundry is detected. If the eccentric load is larger than a predetermined allowable value, the rotational speed of the drum is reduced for a short time when the eccentric load reaches the upper portion of the drum. Only to drop the laundry by reducing the centrifugal force acting on the laundry. After the laundry in the drum is dispersed and arranged in a well-balanced manner, the drum is rotated at a high speed to perform the dehydration.

According to experiments conducted by the inventors of the present invention, it has been confirmed that various attempts to suppress the vibration can significantly reduce the vibration of the drum as compared with the related art. The present invention has been made in view of such a situation, and is not restricted by the conventional vibration-proof structure as described above, and has sufficient vibration-proof properties and robustness against vibrations that cannot be completely eliminated. It is an object of the present invention to provide a floor-fixed washing machine having a novel structure capable of reducing the cost and reducing the weight of the washing machine while maintaining the above conditions.

[0008]

Means for Solving the Problems, Embodiments of the Invention, and Effects of the Invention A first invention made to solve the above problems is a drum which stores laundry therein and is rotated about a horizontal axis. And a substantially cylindrical outer tub in which the drum is housed, and a housing for accommodating the outer tub, and a floor-fixed laundry for fixing and installing a bottom portion constituting the housing on a horizontal floor. In the machine, a pedestal is provided for receiving and holding the side peripheral surface of the outer tub at an obliquely lower right and left of the circumference, the pedestal is provided on the bottom side of the casing with a horizontal joining surface, and the casing is provided with a vertical joining surface. It is characterized in that it is fixed to both side surfaces of the body using fixing members penetrating the joint surfaces.

In the structure of the fixed-floor type washing machine according to the first invention, the outer tub is not suspended in the hollow inside the housing as in the conventional washing machine, but is mounted on the pedestal fixed to the housing. Fixed in a state of being placed on When the outer tub vibrates, the pedestal is pushed down obliquely, so that this force can be considered separately in the horizontal direction (swinging direction) and the vertical direction (gravity direction). The horizontal force acts substantially perpendicular to the vertical joint surface, while the vertical force acts substantially perpendicular to the horizontal joint surface. For this reason, a force in the pulling direction is applied to the fixing member that fixes each joint surface. Generally, fixing members such as rivets and screws have higher strength against tensile force than shear force, so that the fixing member does not break even when a relatively large force is applied, and the housing is robust. Is maintained.

Therefore, according to the structure of the fixed-floor type washing machine according to the first invention, in the structure in which the outer tub is directly attached to the housing without using the vibration absorbing member, the pedestal and the housing are welded. Can be fixed using a fixing member such as a rivet or a screw. For this reason, it is possible to eliminate or reduce a welding operation that requires skill in the operation and requires a long operation time.

In particular, by using a rivet as the fixing member, the number of parts is not reduced and the fixing operation is facilitated.

Further, in the fixed-floor type washing machine according to the first invention, the pedestal comprises a right pedestal and a left pedestal which are separated on the left and right sides of a side peripheral surface of the outer tub. It is preferable to adopt a configuration of being fixed. According to this configuration,
Since the pedestal can be small, the cost of the member itself can be reduced and the weight can be advantageously reduced. In addition, since the space below the center of the outer tank is a space, it is easy to arrange the motor as described later.

Further, if the pedestals are separated into left and right, when the outer tub vibrates, a force is applied to each of the left and right pedestals so as to escape outward. Therefore, in order to reduce this force as much as possible, a connecting member that connects the lower left and right pedestals on the side peripheral surface of the outer tub and the left or right pedestal farther from the position while applying a tensile force to each other is provided. It is good to have composition. According to this configuration, for example, when the outer tub vibrates to the left, a force acts to separate from the right pedestal, but a tensile force acts between the two by the connecting member,
As a result, the vibration of the outer tank is suppressed.

Further, in the fixed-floor washing machine according to the first aspect of the present invention, since the outer tub does not vibrate greatly, it is not necessary to fix the motor to the outer tub itself as in the prior art. A motor can be arranged on a motor base whose height is freely adjustable, and the rotating shaft of the motor and the rotating shaft of the drum can be connected via a rotational driving force transmitting member. Here, the rotational driving force transmitting member is a pulley, a V-belt, or a member corresponding thereto. In this configuration, for example, after attaching the outer tub, a V-belt is wound around a pulley attached to the rotating shaft of the motor and a pulley attached to the rotating shaft of the drum, and the height of the motor base is adjusted. The tension of the V-belt can be adjusted appropriately.

In addition, since such a height adjustment is sufficient in a relatively narrow adjustment range, the motor base is provided with the other end of a plate member that rotates around a rotation axis substantially parallel to the rotation axis of the motor. Can be supported and fixed. According to this configuration, the number of components can be reduced, and the height can be easily adjusted.

According to a second aspect of the present invention, there is provided a drum which stores laundry therein and is rotated about a horizontal axis, a substantially cylindrical outer tub which houses the drum, and a housing which stores the outer tub. A fixed floor-type washing machine for fixing and installing a bottom portion constituting the housing on a horizontal floor surface, wherein a predetermined thickness is provided between the installation surface of the bottom portion facing the floor surface and the floor surface. The plate member is sandwiched in a state where both sides or the periphery are supported by the plate member and a gap is present in the center, and the fixing member penetrates through the installation surface and strikes the floor surface at the portion where the gap exists. Features.

[0017] In the fixed-floor washing machine according to the second aspect of the present invention, when the fixing member is driven into the floor, the installation surface is bent downward, and the gap of the plate member is eliminated. Then, since the installation surface presses the plate members on both sides or the surroundings more strongly due to the bending, the adhesion between the installation surface and the plate members and between the plate members and the floor surface is improved. Thereby, the housing is more firmly fixed to the floor surface, and the rattling of the washing machine is suppressed even when the outer tub vibrates.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a washing machine according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing the internal structure of the washing machine of this embodiment, FIG. 2 is a right side view showing the internal structure of the washing machine of this embodiment, and FIG. 3 is an enlarged view of a portion A in FIG. In this washing machine, an outer box is formed by attaching a sheet metal member composed of a side plate and an upper plate so as to cover from above, and further attaching a front plate and a rear plate.

A drum (not shown) is provided inside the cylindrical outer tub 1, and a main shaft (not shown) attached to the rotation center of the drum is supported by a bearing 2 mounted on the rear end face of the outer tub 1. The main pulley 3 is supported and protrudes rearward, and a large-diameter main pulley 3 is attached to a tip end thereof. At the front end surface of the outer tub 1, a circular clothing input port 4 is opened, and the clothing input port 4 looks through the front opening of the drum. In addition, clothing input port 4
Is provided with a door so that the outer tub 1 is substantially sealed.

A U-shaped member 5, which is long in the depth direction, is fixed to the diagonally lower right and lower left sides of the side peripheral surface of the outer tub 1 by welding. Thereby, the outer tub 1 and the U-shaped member 5 are integrated. The outer tub 1 is held in a state of being mounted on a pedestal 10 provided at two locations on the front and rear and symmetrically (ie, four locations). The pedestal 10 has an upper surface 11b bent so as to be in close contact with the center surface of the U-shaped member 5 about a pentagonal center surface 11a, a side surface 11c bent parallel to the outer box side surface, and a floor surface bent parallel to the floor surface. Support plate member 1 made of sheet metal having a bottom surface 11d
1, a plate surface 12a in close contact with the central surface 11a of the main support plate member 11, and a side surface 12 bent parallel to the side surface of the outer box.
b) and a reinforcing plate member 12 made of sheet metal having

The upper surface 11b of the main support plate member 11 and the U-shaped member 5 are fixed by screwing a bolt and a nut together, while the central surface 11a of the main support plate member 11 and the plate surface 12a of the reinforcing plate member 12 It is fixed by rivets as described later. Further, the side surface 11c of the main support plate member 11 and the side surface 12b of the reinforcing plate member 12 are fixed to the U-shaped side frame 13 provided on the side thereof by rivets in the horizontal direction. Furthermore, the bottom surface 11d of the main support plate member 11
Is mounted on the hollow front frame 14 and the rear frame 15 which are arranged sideways, and is fixed by rivets in the vertical direction. Note that the state of fixation with the rivets in the horizontal and vertical directions is clearly shown in FIG.

The U-shaped member 5 has a downwardly projecting piece 5a near the pedestal 10, and the center of the main support plate member 11 on the side remote from the projecting piece 5a of the U-shaped member 5 on both sides. Surface 11a
Are connected to each other by a bar-shaped member 16 so as to intersect in an X-shape. Attachment portions 16a at both ends of this rod-shaped member 16
Is a protruding piece 5a and a support plate member 1 by bolts and nuts.
1, the mounting portion 16a and the central metal rod 16
b is screwed together with a screw. Therefore, this metal rod 1
When the 6b is rotated, the screwing length with the attachment portion 16a changes,
The entire length of the rod-shaped member 16 changes. Thereby, after attaching the rod-shaped member 16 to a predetermined position, the metal rod 16
By rotating b, the tensile strength can be adjusted.

A motor 6 is mounted on a motor support 20 at a rear portion below the outer tub 1, and a not-shown V is provided between a small-diameter motor pulley 8 attached to a rotating shaft 7 of the motor 6 and the main pulley 3. The belt is stretched with moderate tension,
Thereby, the rotational driving force of the motor 6 is transmitted to the drum. The motor support 20 is rotatable about a rotation shaft 21 extending in the depth direction, and the mounting height of the end is adjustable by a bolt 22 provided at the end of the support 20 opposite to the rotation shaft. It has become. Thus, after the outer tub 1 is mounted at a predetermined position in the washing machine assembling process, the mounting height of the motor 6 can be raised and lowered to appropriately adjust the tension of the V-belt.

FIG. 4 is a cross-sectional view showing an example of a rivet used for fixing two plate members in this embodiment. The rivet 40 has a core rod portion 41 made of a relatively hard metal penetrating the center, and a fixing portion 42 made of a relatively soft metal that covers the core rod portion 41 and presses the plate members 43 and 44 from both sides. Consisting of With such rivets,
When the rivet is tightened, the fixing portion 42 swells to the outer peripheral side and closely adheres to the inner periphery of the through-hole to reduce rattling.

Generally, the fixing members such as rivets and bolts have a characteristic that they are more easily broken by a shearing force than a tensile force. Therefore, the fixed-floor washing machine of the present embodiment has a structure in which the force applied to the rivet 40 when the outer tub 1 vibrates is not a shear force but a tensile force. That is, for example, when the laundry stored in the drum rotates at high speed in a state of being unbalanced around the rotation axis, the outer tub 1 also vibrates with the vibration of the drum,
Since the outer tub 1 is supported diagonally downward on both sides by the pedestal 10, this force is decomposed into two components in the horizontal direction (the swing direction) and the vertical direction (the direction of gravity) in the main support plate member 11 of the pedestal 10. can do. As described above, the main support plate member 11 and the reinforcing plate member 12 are fixed by the rivets 40 in the horizontal and vertical directions. For this reason, the horizontal force is received by the vertical fixing portion (for example, portion B in FIG. 3A) between the main support plate member 11 and the reinforcing plate member 12 and the side frame 13, while the vertical force is applied. Is applied to the horizontal fixing portion between the main support plate member 11 and the front frame 14 (for example, FIG. 3A).
Part C). For this reason, the rivet 40 is received with a relatively large strength in the pulling direction, so that even if the outer tub 1 is vibrated, the risk of the rivet 40 being damaged is extremely small.

Next, the structure for fixing the floor of the washing machine with fixed floor will be described with reference to FIG. A metal mounting surface plate member 30 that is in close contact with a horizontal floor surface 31 and a bottom surface portion 14a of a front frame body 14 and a bottom surface portion 13a of a side frame body 13 that constitute a housing are made of metal. Is sandwiched in a sandwich shape. Since the center of the shim 33 is interrupted, when the anchor bolt 32 is not driven, a slight gap is formed between the bottom plate 14a and the bottom portion 13a and the installation plate 30 as shown in FIG. 33a is present. Bottom plate 1 to fix the washing machine to the floor
When the anchor bolt 32 is driven in from the upper side of 4a, as shown in FIG. 3 (b), it is pressed by the head of the anchor bolt 32 and the bottom plate 14a around it is bent downward. Then, the shim 33 is pressed more strongly than the upper part by the elastic force of the bottom plate 14a, and the shim 33
Further, the installation surface plate member 30 presses the floor surface 31 more strongly. Thereby, the washing machine is firmly fixed to the floor surface 31.

It should be noted that the above embodiment is merely an example, and it is apparent that modifications and modifications can be made as appropriate within the scope of the present invention.

[Brief description of the drawings]

FIG. 1 is a front view showing an internal structure of a fixed-floor type washing machine according to an embodiment of the present invention.

FIG. 2 is a right side view showing the internal structure of the fixed floor washing machine.

FIG. 3 is an enlarged view of a portion A in FIG. 1;

FIG. 4 is a sectional view showing an example of a rivet used for fixing a plate member in the washing machine of the embodiment.

[Description of Signs] 1 ... Outer tub 2 ... Bearing 5 ... U-shaped member 6 ... Motor 10 ... Pedestal 11 ... Main support plate member 12 ... Reinforcement plate member 13 ... Side frame member 14 ... Front frame member 15 ... Rear part Frame 16 ... Bar-shaped member 20 ... Motor support 30 ... Installation surface plate 31 ... Floor surface 32 ... Anchor bolt 33 ... Shim 40 ... Rivet 41 ... Core rod 42 ... Fixed part

Claims (7)

[Claims] A drum that stores laundry therein and is rotated about a horizontal axis, a substantially cylindrical outer tub that houses the drum, and a housing that stores the outer tub; In a floor-fixing type washing machine in which a bottom portion constituting a housing is fixed and installed on a horizontal floor surface, a pedestal is provided for receiving and holding a side peripheral surface of an outer tub at an obliquely lower left and right of the circumference, and the pedestal is provided. Fixed to the bottom surface of the housing with the horizontal joint surface, and to both side surfaces of the housing with the vertical joint surface using fixing members penetrating the joint surfaces, respectively. Washing machine. 2. The fixed floor type washing machine according to claim 1, wherein the fixing member is a rivet. 3. The pedestal comprises a right pedestal and a left pedestal, which are separated on the left and right sides of a side peripheral surface of the outer tub, and each of the left and right pedestals is fixed to a housing, respectively. The fixed floor washing machine as described in the above. 4. A connecting member for connecting the lower left and right pedestals on the side peripheral surface of the outer tub and the left or right pedestal farther from the position while applying a tensile force to each other. 4. The fixed floor type washing machine according to 3. 5. A motor is arranged on a motor base whose height is adjustable on the bottom surface of the housing, and a rotation axis of the motor and a rotation axis of the drum are connected via a rotation driving force transmitting member. The floor-fixed washing machine according to any one of claims 1 to 4, wherein the washing machine is connected to the floor. 6. The motor base according to claim 5, wherein the motor base is fixed by cantilevering the other end of a plate member that rotates about a rotation axis substantially parallel to a rotation axis of the motor. Floor fixed washing machine. 7. A drum for accommodating laundry therein and rotated about a horizontal axis, a substantially cylindrical outer tub for housing the drum, and a housing for accommodating the outer tub. In a floor-fixed type washing machine in which the bottom part of the housing is fixed and installed on a horizontal floor, a plate member having a predetermined thickness is provided between the installation surface of the bottom part facing the floor and the floor. A floor fixing method wherein both sides or the periphery are supported by the plate member and sandwiched in a state where a gap exists in the center, and a fixing member is driven into the floor surface through a mounting surface at a portion where the gap exists. Type washing machine.